This application claims the priorities of Chinese Patent Application No. 201610826979.7, filed on Sep. 18, 2016, entitled “Vertical Axis Wind Turbine with its Blade Support Shielded” and Chinese Patent Application No. 201610827019.2, filed on Sep. 18, 2016, entitled “Cantilever for Vertical Axis Wind Turbine and Wind Turbine Having Same”, the contents of which are incorporated herein by reference in their entireties. This application is a 35 U.S.C. § 371 national application of international patent application PCT/CN2017/083481 filed on May 8, 2017, the content of which is also hereby incorporated by reference.
The present disclosure relates to a vertical axis wind turbine with its blade support shielded, belonging to the technical field of design and construction of wind turbines and the field of development and design of renewable energy source technology, energy conservation technology, and environmental protection technology.
It is known that most wind turbines used in wind driven generators are horizontal axis turbine type wind turbines with wind wheels having rotation axes horizontally disposed, which fall into the category of high speed wind turbines. These wind turbines have poor performance at medium and low wind speeds and thus brings low running benefit in regions having an annual mean wind speed
Characteristics of the vertical axis wind turbine include no requirement for wind direction, no aerodynamic noise, no infrasonic wave generated, taking blades in turn to transfer energy during rotation of the wind wheel, and periodic change of blade loads. These characteristics have both advantages and disadvantages, and it is important to utilize the advantages and suppress the disadvantages in order to develop the vertical axis wind turbine technology suitable for regions having an annual mean wind speed
In view of this, to address problems existing in the current vertical axis wind turbine, it is necessary to provide a vertical axis wind turbine with a shielded blade support shielded, which can have increased wind turbine performances by improving the structure of the wind wheel.
The above objective can be achieved by following technical schemes:
A vertical axis wind turbine with a shielded blade support includes a wind wheel rotatable about a vertical rotation axis and a bearing body determining the vertical rotation axis. The wind wheel includes a wheel frame and blades distributed at a periphery of the wheel frame. The wheel frame is rotatably connected to the bearing body. Wherein an upper portion and a lower portion of the wheel frame are respectively provided with one set of blade supports. A tail section or a tail end of each of the blade supports away from the vertical rotation axis is respectively connected with a baffle. The baffle is located between the tail section of a respective blade support and a respective blade, or an edge of the baffle is integrated with the tail end of a respective blade support. The baffle on the upper portion of the wheel frame vertically corresponds to the respective baffle on the lower portion of the wheel frame. A respective blade is connected between the corresponding baffles. Two ends of the blade are connected to the corresponding baffles directly or via a connecting piece.
In practical research, the applicant found that by disposing two ends of the blade on the baffles, and by shielding the tail sections of the blade supports with the baffles, or by integrating the baffles directly with the tail ends of the blade supports, which also has the shielding function, on one hand, the blade support is shielded, so that its interference to flow field, which is adverse to wind energy absorption of the blade, is eliminated; on the other hand, the baffle in such structure can be used as a mounting platform for a power controller for medium-to-large-scale wind turbines, so that the cost efficiency of the wind turbine is increased; in addition, the blade can absorb the wind energy at its entire height and have an effect of gathering wind, so that the performance loss at ends of the blade is decreased, and the driven force of the blade and the utilization efficiency of the wind energy are improved.
By adopting a preferred structure including a plate connecting piece, the configuration of the power controlling component can be optimized better, which is beneficial to improve performances of the wind turbine. When an elastic controller is adopted, the power of the wind turbine can be controlled by achieving an equilibrium of forces between the centrifugal force of the blade and the elastic force; moreover, due to the utilization of principle of decomposition of force, the precision and sensitivity requirements for an elastic piece of the elastic controller can be decreased, and thus the controlling cost is decreased. When an electric controller is adopted, the power of the wind turbine is controlled in an electric control manner.
When a plurality of wind wheels are used, wind wheels with opposite rotation directions are paired. Not only the windward plane formed by the paired wind wheels can be automatically regulated to be perpendicular to the wind direction, so that the wind wheels are prevented from being shielded by an upright column or a tower, thereby ensuring sufficient wind energy absorption of the wind wheels, but the start of the rotation of the wind wheel is facilitated, the torque and the centrifugal force load about the column or the tower are eliminated, and the overall stability of the integrated high power system is increased.
The present disclosure has following advantageous effects: by improving the structure of the wind wheel, especially improving the mounting structure of the blade, the present disclosure can eliminate interference to flow field generated by the blade supports, which is adverse to wind energy absorption of the blade, thereby increasing the utilization efficiency of the wind energy; the blade can absorb the wind energy at its entire height and have an effect of gathering wind, so that the performance loss at ends of the blade is decreased, and the driven force of the blade and the utilization efficiency of the wind energy are improved.
In order to make the purposes, technical solutions and advantages of the present disclosure to be understood more clearly, the present disclosure will be described in further detail with the accompanying drawings and the following embodiments. It should be understood that the specific embodiments described herein are merely examples to illustrate the present disclosure, not to limit the present disclosure.
A vertical axis wind turbine with a shielded blade support of the present disclosure includes a wind wheel configured to rotate about a vertical rotation axis and a bearing body determining the vertical rotation axis. The wind wheel includes a wheel frame and blades distributed at a periphery of the wheel frame. The wheel frame is rotatably connected to the bearing body. An upper portion and a lower portion of the wheel frame are respectively provided with one set of blade supports. A tail section or a tail end of each of the blade supports away from the vertical rotation axis is respectively connected with a baffle. The baffle is located between the tail section of respective blade support and respective blade, or an edge of the baffle is integrated with the tail end of respective blade support. The baffle on the upper portion of the wheel frame vertically corresponds to the respective baffle on the lower portion of the wheel frame. A respective blade is connected between the corresponding baffles. Two ends of the blade are connected to the corresponding baffles directly or via connecting pieces.
A projected dimension of the baffle on a plane perpendicular to the vertical rotation axis satisfies: a maximum size in a radial direction of the wind wheel is 0.15 times to 0.85 times a radius of the wind wheel, and a maximum size in a direction perpendicular to the radial direction of the wind wheel is 0.7 times to 1.3 times a projected chord length of an end face of the blade on a baffle plane.
The wheel frame includes an upper connection portion and a lower connection portion, or includes an upper connection portion, an intermediate connection portion, and a lower connection portion. The upper connection portion and the lower connection portion are respectively provided with the blade support. The blade support of the upper connection portion is connected to an upper end of the blade via the baffle. The intermediate connection portion is connected to an intermediate portion of a blade. The blade support of the lower connection portion is connected to a lower end of the blade via the baffle.
A radial length of the blade support of the upper connection portion is equal to or different from a radial length of the blade support of the lower connection portion. The blade is connected between the upper connection portion and the lower connection portion vertically or at an angle inclined relative to a vertical direction.
The lower connection portion is at least two-fold rotationally symmetrical about the vertical rotation axis. The lower connection portion is shaped as a triangle or a trapezoid or a taper or a frustum. The taper is a pyramid or a cone. The frustum is a frustum of a pyramid or a cone. A vertex of the triangle or the taper, or a base edge of the trapezoid having a shorter length, or a base face of the frustum having a smaller area forms a part of the lower connection portion that is close to the upper connection portion.
The lower connection portion can use one of a first configuration, a second configuration, a third configuration, and a fourth configuration.
The first configuration: The wheel frame further includes a wheel axle with the vertical rotation axis as a center line. A lower end of the wheel axle and the lower connection portion are directly fixedly connected, or coaxially fixedly connected with a flange or a transmission body, or coaxially sleeved with a transmission body. An upper end of the wheel axle and the upper connection portion are directly fixedly connected, or coaxially fixedly connected with a flange or a transmission body, or coaxially sleeved with a transmission body. When the lower end of the wheel axle and the lower connection portion are directly fixedly connected, or coaxially fixedly connected with a flange, or coaxially sleeved with a transmission body, the upper end of the wheel axle is coaxially fixedly connected to a transmission body. When the upper end of the wheel axle and the upper connection portion are directly fixedly connected, or coaxially fixedly connected with a flange, or coaxially sleeved with a transmission body, the lower end of the wheel axle is coaxially fixedly connected to a transmission body. The transmission body is rotatably connected to the bearing body.
The lower connection portion includes a cantilever for the vertical axis wind turbine and a tensile piece. When the lower end of the wheel axle is directly fixedly connected to the lower connection portion, a support connection end of the cantilever for the vertical axis wind turbine is connected to the lower end of the wheel axle directly or via a connection segment. When the lower end of the wheel axle is coaxially fixedly connected with the flange or the transmission body, the support connection end of the cantilever for the vertical axis wind turbine is connected to the flange or the transmission body directly or via a connection segment.
A blade connection end of the cantilever for the vertical axis wind turbine is fixedly connected to the tensile piece, and a tail end of the tensile piece away from the vertical rotation axis is connected to the blade via the baffle. Or the blade connection end of the cantilever for the vertical axis wind turbine is connected to the blade via the baffle, and the tail end of the tensile piece is fixedly connected to the cantilever for the vertical axis wind turbine.
The cantilever for the vertical axis wind turbine constitutes a side edge of the shape of the lower connection portion. The tensile piece constitutes or is parallel to a lower base edge or a lower base face of the shape of the lower connection portion.
The second configuration: The wheel frame further includes a wheel axle with the vertical rotation axis as a center line. A lower end of the wheel axle and the lower connection portion are directly fixedly connected, or coaxially fixedly connected with a flange or a transmission body, or coaxially sleeved with a transmission body. An upper end of the wheel axle and the upper connection portion are directly fixedly connected, or coaxially fixedly connected with a flange or a transmission body, or coaxially sleeved with a transmission body. When the lower end of the wheel axle and the lower connection portion are directly fixedly connected, or coaxially fixedly connected with a flange, or coaxially sleeved with a transmission body, the upper end of the wheel axle is coaxially fixedly connected to a transmission body. When the upper end of the wheel axle and the upper connection portion are directly fixedly connected, or coaxially fixedly connected with a flange, or coaxially sleeved with a transmission body, the lower end of the wheel axle is coaxially fixedly connected to a transmission body. The transmission body is rotatably connected to the bearing body.
The lower connection portion includes a cantilever for the vertical axis wind turbine. When the lower end of the wheel axle is directly fixedly connected to the lower connection portion, a support connection end of the cantilever for the vertical axis wind turbine is connected to the lower end of the wheel axle directly or via a connection segment. When the lower end of the wheel axle is coaxially fixedly connected to the flange or the transmission body, the support connection end of the cantilever for the vertical axis wind turbine is connected to the flange or the transmission body directly or via a connection segment. A blade connection end of the cantilever for the vertical axis wind turbine is connected to the blade via the baffle. The cantilever for the vertical axis wind turbine constitutes a side edge of the shape of the lower connection portion.
The third configuration: The wheel frame further includes a transmission body rotatably connected to the bearing body.
The lower connection portion includes a cantilever for vertical axis wind turbine and a tensile piece. A support connection end of the cantilever for vertical axis wind turbine is connected to the transmission body directly or via a connection segment.
A blade connection end of the cantilever for vertical axis wind turbine is fixedly connected to the tensile piece, and a tail end of the tensile piece away from the vertical rotation axis is connected to the blade via the baffle. Or the blade connection end of the cantilever for the vertical axis wind turbine is connected to the blade via the baffle, and the tail end of the tensile piece is fixedly connected to the cantilever for the vertical axis wind turbine.
The cantilever for the vertical axis wind turbine constitutes a side edge of the shape of the lower connection portion. The tensile piece constitutes or is parallel to a lower base edge or a lower base face of the shape of the lower connection portion.
The fourth configuration: The wheel frame further includes a transmission body rotatably connected to the bearing body.
The lower connection portion includes a cantilever for the vertical axis wind turbine. A support connection end of the cantilever for the vertical axis wind turbine is connected to the transmission body directly or via a connection segment. A blade connection end of the cantilever for the vertical axis wind turbine is connected to the blade via the baffle. The cantilever for the vertical axis wind turbine constitutes a side edge of the shape of the lower connection portion.
The upper connection portion is at least two-fold rotationally symmetrical about the vertical rotation axis. The upper connection portion is shaped as triangle or trapezoid or taper or frustum. The taper is a pyramid or a cone. The frustum is a frustum of a pyramid or a cone. A vertex of the triangle or the taper, or a base edge having a shorter length of the trapezoid, or a base face having a smaller area of the frustum forms a part of the upper connection portion that is close to the lower connection portion.
The upper connection portion can use one of a fifth configuration, a sixth configuration, a seventh configuration, and an eighth configuration.
The fifth configuration: The wheel frame further includes a wheel axle with the vertical rotation axis as a center line. An upper end of the wheel axle and the upper connection portion are directly fixedly connected, or coaxially fixedly connected with a flange or a transmission body, or coaxially sleeved with a transmission body. A lower end of the wheel axle and the lower connection portion are directly fixedly connected, or coaxially fixedly connected with a flange or a transmission body, or coaxially sleeved with a transmission body. When the upper end of the wheel axle and the upper connection portion are directly fixedly connected, or coaxially fixedly connected with a flange, or coaxially sleeved with a transmission body, the lower end of the wheel axle is coaxially fixedly connected to a transmission body. When the lower end of the wheel axle and the lower connection portion are directly fixedly connected, or coaxially fixedly connected with a flange, or coaxially sleeved with a transmission body, the upper end of the wheel axle is coaxially fixedly connected to a transmission body. The transmission body is rotatably connected to the bearing body.
The upper connection portion includes a cantilever for the vertical axis wind turbine and a tensile piece, or includes a diagonal tensile piece and a tensile piece. When the upper end of the wheel axle is directly fixedly connected to the upper connection portion, a lower end of the diagonal tensile piece is fixedly connected to the upper end of the wheel axle, or a support connection end of the cantilever for the vertical axis wind turbine is connected to the upper end of the wheel axle directly or via a connection segment. When the upper end of the wheel axle is coaxially fixedly connected with the flange or the transmission body, the lower end of the diagonal tensile piece is fixedly connected to the flange or the transmission body, or the support connection end of the cantilever for the vertical axis wind turbine is connected to the flange or the transmission body directly or via a connection segment.
The upper end of the diagonal tensile piece or a blade connection end of the cantilever for the vertical axis wind turbine is fixedly connected to the tensile piece, and a tail end away from the vertical rotation axis of the tensile piece is connected to the blade directly via the baffle. Or the upper end of the diagonal tensile piece is connected to the blade via the baffle, or the blade connection end of the cantilever for the vertical axis wind turbine is connected to the blade via the baffle, and the tail end of the tensile piece is fixedly connected to diagonal tensile piece.
The diagonal tensile piece or the cantilever for the vertical axis wind turbine constitutes a side edge of the shape of the upper connection portion. The tensile piece constitutes or is parallel to an upper base edge or an upper base face of the shape of the upper connection portion.
The sixth configuration: The wheel frame further includes a wheel axle with the vertical rotation axis as a center line. An upper end of the wheel axle and the upper connection portion are directly fixedly connected, or coaxially fixedly connected with a flange or a transmission body, or coaxially sleeved with a transmission body. A lower end of the wheel axle and the lower connection portion are directly fixedly connected, or coaxially fixedly connected with a flange or a transmission body, or coaxially sleeved with a transmission body. When the upper end of the wheel axle and the upper connection portion are directly fixedly connected, or coaxially fixedly connected with a flange, or coaxially sleeved with a transmission body, the lower end of the wheel axle is coaxially fixedly connected to a transmission body. When the lower end of the wheel axle and the lower connection portion are directly fixedly connected, or coaxially fixedly connected with a flange, or coaxially sleeved with a transmission body, the upper end of the wheel axle is coaxially fixedly connected to a transmission body. The transmission body is rotatably connected to the bearing body.
The upper connection portion includes a diagonal tensile piece or a cantilever for the vertical axis wind turbine. When the upper end of the wheel axle is fixedly connected to the upper connection portion, a lower end of the diagonal tensile piece is fixedly connected to the upper end of the wheel axle, or a support connection end of the cantilever for the vertical axis wind turbine is connected to the upper end of the wheel axle directly or via a connection segment. When the upper end of the wheel axle is coaxially fixedly connected with the flange or the transmission body, the lower end of the diagonal tensile piece is fixedly connected to the flange or the transmission body, or the support connection end of the cantilever for the vertical axis wind turbine is connected to the flange or the transmission body directly or via a connection segment. An upper end of the diagonal tensile piece is connected to the blade via the baffle, or the support connection end of the cantilever for the vertical axis wind turbine is connected to the blade via the baffle. The diagonal tensile piece or the cantilever for the vertical axis wind turbine constitutes a side edge of the shape of the upper connection portion.
The seventh configuration: The wheel frame further includes a transmission body rotatably connected to the bearing body.
The upper connection portion includes a cantilever for the vertical axis wind turbine and a tensile piece, or includes a diagonal tensile piece and a tensile piece. A lower end of the diagonal tensile piece is fixedly connected to the transmission body, or a support connection end of the cantilever for the vertical axis wind turbine is connected to the transmission body directly or via a connection segment.
An upper end of the diagonal tensile piece or a blade connection end of the cantilever for the vertical axis wind turbine is fixedly connected to the tensile piece, and a tail end of the tensile piece away from the vertical rotation axis is connected to the blade via the baffle. Or the upper end of the diagonal tensile piece is connected to the blade via the baffle, or the blade connection end of the cantilever for the vertical axis wind turbine is connected to the blade via the baffle, and the tail end of the tensile piece is fixedly connected to the diagonal tensile piece.
The diagonal tensile piece or the cantilever for the vertical axis wind turbine constitutes a side edge of the shape of the upper connection portion. The tensile piece constitutes or is parallel to an upper base edge or an upper base face of the shape of the upper connection portion.
The eighth configuration: The wheel frame further includes a transmission body rotatably connected to the bearing body.
The upper connection portion includes a diagonal tensile piece and a cantilever for the vertical axis wind turbine. A lower end of the diagonal tensile piece is fixedly connected to the transmission body, or a support connection end of the cantilever for the vertical axis wind turbine is connected to the transmission body directly or via a connection segment. An upper end of the diagonal tensile piece is connected to the blade via the baffle, or a blade connection end of the cantilever for the vertical axis wind turbine is connected to the blade via the baffle. The diagonal tensile piece or the cantilever for the vertical axis wind turbine constitutes a side edge of the shape of the upper connection portion.
The intermediate connection portion is at least two-fold rotationally symmetrical about the vertical rotation axis. The intermediate connection portion is shaped as triangle or trapezoid or taper or frustum. The taper is a pyramid or a cone. The frustum is a frustum of a pyramid or a cone. A vertex of the triangle or the taper, or a base edge having a shorter length of the trapezoid, or a base face having a smaller area of the frustum forms a part of the intermediate connection portion that is close to the lower or upper connection portion.
The intermediate connection portion can use one of a ninth configuration, a tenth configuration, an eleventh configuration, and a twelfth configuration.
The ninth configuration: The wheel frame further includes a wheel axle with the vertical rotation axis as a center line. A lower end of the wheel axle and the lower connection portion are directly fixedly connected, or coaxially fixedly connected with a flange or a transmission body, or coaxially sleeved with a transmission body. An upper end of the wheel axle and the upper connection portion are directly fixedly connected, or coaxially fixedly connected with a flange or a transmission body, or coaxially sleeved with a transmission body. When the lower end of the wheel axle and the lower connection portion are directly fixedly connected, or coaxially fixedly connected with a flange, or coaxially sleeved with a transmission body, the upper end of the wheel axle is coaxially fixedly connected to a transmission body. When the upper end of the wheel axle and the upper connection portion are directly fixedly connected, or coaxially fixedly connected with a flange, or coaxially sleeved with a transmission body, the lower end of the wheel axle is coaxially fixedly connected to a transmission body. The transmission body is rotatably connected to the bearing body.
The intermediate connection portion includes a cantilever for the vertical axis wind turbine and a tensile piece. There is at least one intermediate connection portion. Each intermediate connection portion is respectively located at the upper end of the wheel axle, at the lower end of the wheel axle, or between the upper and lower ends of the wheel axle.
When the intermediate connection portion is located at the upper end of the wheel axle, if the upper end of the wheel axle is directly fixedly connected to the intermediate connection portion, then a support connection end of the cantilever for the vertical axis wind turbine is connected to the upper end of the wheel axle directly or via a connection segment; if the upper end of the wheel axle is coaxially fixedly connected with a flange or a transmission body or is coaxially sleeved with a transmission body, then the support connection end of the cantilever for the vertical axis wind turbine is connected to the flange or the transmission body directly or via a connection segment.
When the intermediate connection portion is located at the lower end of the wheel axle, if the lower end of the wheel axle is directly fixedly connected to the intermediate connection portion, then the support connection end of the cantilever for the vertical axis wind turbine is connected to the lower end of the wheel axle directly or via a connection segment; if the lower end of the wheel axle is coaxially fixedly connected with a flange or a transmission body or is coaxially sleeved with a transmission body, then the support connection end of the cantilever for the vertical axis wind turbine is connected to the flange or the transmission body directly or via a connection segment.
When the intermediate connection portion is located between the upper and lower ends of the wheel axle, the support connection end of the cantilever for the vertical axis wind turbine is connected to the wheel axle directly or via a connection segment, or the support connection end of the cantilever for the vertical axis wind turbine is connected to the flange or the transmission body directly or via a connection segment.
A blade connection of the cantilever for the vertical axis wind turbine is fixedly connected to the tensile piece, a tail end of the tensile piece away from the vertical rotation axis is connected to the blade directly or via the baffle. Or the blade connection of the cantilever for the vertical axis wind turbine is connected to the blade directly or via a connection portion or a connecting piece, and the tail end of the tensile piece is fixedly connected to the cantilever for the vertical axis wind turbine.
The cantilever for the vertical axis wind turbine constitutes a side edge of the shape of the intermediate connection portion. The tensile piece constitutes or is parallel to a base edge or a base face of the shape of the intermediate connection portion.
The tenth configuration: The wheel frame further includes a wheel axle with the vertical rotation axis as a center line. A lower end of the wheel axle and the lower connection portion are directly fixedly connected, or coaxially fixedly connected with a flange or a transmission body, or coaxially sleeved with a transmission body. An upper end of the wheel axle and the upper connection portion are directly fixedly connected, or coaxially fixedly connected with a flange or a transmission body, or coaxially sleeved with a transmission body. When the lower end of the wheel axle and the lower connection portion are directly fixedly connected, or coaxially fixedly connected with a flange, or coaxially sleeved with a transmission body, the upper end of the wheel axle is coaxially fixedly connected to a transmission body. When the upper end of the wheel axle and the upper connection portion are directly fixedly connected, or coaxially fixedly connected with a flange, or coaxially sleeved with a transmission body, the lower end of the wheel axle is coaxially fixedly connected to a transmission body. The transmission body is rotatably connected to the bearing body.
The intermediate connection portion includes a cantilever for the vertical axis wind turbine. There is at least one intermediate connection portion. Each intermediate connection portion is respectively located at the upper end of the wheel axle, at the lower end of the wheel axle, or between the upper and lower ends of the wheel axle.
When the intermediate connection portion is located at the upper end of the wheel axle, if the upper end of the wheel axle is directly fixedly connected to the intermediate connection portion, then a support connection end of the cantilever for the vertical axis wind turbine is connected to the upper end of the wheel axle directly or via a connection segment; if the upper end of the wheel axle is coaxially fixedly connected with a flange or a transmission body or is coaxially sleeved with a transmission body, then the support connection end of the cantilever for the vertical axis wind turbine is connected to the flange or the transmission body directly or via a connection segment.
When the intermediate connection portion is located at the lower end of the wheel axle, if the lower end of the wheel axle is directly fixedly connected to the intermediate connection portion, then the support connection end of the cantilever for the vertical axis wind turbine is connected to the lower end of the wheel axle directly or via a connection segment; if the lower end of the wheel axle is coaxially fixedly connected with a flange or a transmission body or is coaxially sleeved with a transmission body, then the support connection end of the cantilever for the vertical axis wind turbine is connected to the flange or the transmission body directly or via a connection segment.
When the intermediate connection portion is located between the upper and lower ends of the wheel axle, the support connection end of the cantilever for the vertical axis wind turbine is connected to the wheel axle directly or via a connection segment, or the support connection end of the cantilever for the vertical axis wind turbine is connected to the flange or the transmission body directly or via a connection segment.
A blade connection of the cantilever for the vertical axis wind turbine is connected to the blade directly or via a connection portion or a connecting piece. The cantilever for the vertical axis wind turbine constitutes a side edge of the shape of the intermediate connection portion.
The eleventh configuration: The wheel frame further includes a wheel axle with the vertical rotation axis as a center line. A lower end of the wheel axle and the lower connection portion are directly fixedly connected, or coaxially fixedly connected with a flange or a transmission body, or coaxially sleeved with a transmission body. An upper end of the wheel axle and the upper connection portion are directly fixedly connected, or coaxially fixedly connected with a flange or a transmission body, or coaxially sleeved with a transmission body. When the lower end of the wheel axle and the lower connection portion are directly fixedly connected, or coaxially fixedly connected with a flange, or coaxially sleeved with a transmission body, the upper end of the wheel axle is coaxially fixedly connected to a transmission body. When the upper end of the wheel axle and the upper connection portion are directly fixedly connected, or coaxially fixedly connected with a flange, or coaxially sleeved with a transmission body, the lower end of the wheel axle is coaxially fixedly connected to a transmission body. The transmission body is rotatably connected to the bearing body.
The intermediate connection portion includes a diagonal tensile piece and a horizontal tensile piece. There is at least one intermediate connection portion. Each intermediate connection portion is respectively located at the upper end of the wheel axle, at the lower end of the wheel axle, or between the upper and lower ends of the wheel axle.
When the intermediate connection portion is located at the upper end of the wheel axle, an upper end of the diagonal tensile piece is fixedly connected to the upper connection portion, and one end of the horizontal tensile piece is fixedly connected to the wheel axle or the flange or the transmission body.
A lower end of the diagonal tensile piece is fixedly connected to the horizontal tensile piece, and the other end of the horizontal tensile piece is directly connected to the blade. Or the lower end of the diagonal tensile piece is directly connected to the blade, and the other end of the horizontal tensile piece is fixedly connected to diagonal tensile piece.
When the intermediate connection portion is located at the lower end of the wheel axle, the lower end of the diagonal tensile piece is fixedly connected to the lower connection portion, and one end of the horizontal tensile piece is fixedly connected to the wheel axle or the flange or the transmission body.
The upper end of the diagonal tensile piece is fixedly connected to the horizontal tensile piece, and the other end of the horizontal tensile piece is directly connected to the blade. Or the upper end of the diagonal tensile piece is directly connected to the blade, and the other end of the horizontal tensile piece is fixedly connected to diagonal tensile piece.
When the intermediate connection portion is located between the upper and lower ends of the wheel axle, one end of the diagonal tensile piece and one end of the horizontal tensile piece are respectively fixedly connected to the wheel axle or the transmission body.
The other end of the diagonal tensile piece is fixedly connected to the horizontal tensile piece, and the other end of the horizontal tensile piece is directly connected to the blade. Or the other end of the diagonal tensile piece is directly connected to the blade, and the other end of the horizontal tensile piece is fixedly connected to the diagonal tensile piece.
The diagonal tensile piece constitutes a side edge of the shape of the intermediate connection portion. The horizontal tensile piece constitutes a base edge or a base face of the shape of the intermediate connection portion.
The cantilever for the vertical axis wind turbine includes a first main body component and a second main body component which are fixedly connected via a reinforcing piece. On end of the first main body component and one end of the second main body component are fixedly connected to each other, in contact with each other, or spaced from each other and together form the blade connection end of the cantilever. The other end of the first main body component and the other end of the second main body component are fixedly connected to, in contact with, or spaced from each other and together form the support connection end of the cantilever.
Shapes of the first and second main body components are respectively and independently selected from straight line shape and arc shape. The first and second main body components are aligned vertically or horizontally or diagonally.
When the blade connection end is connected to the blade of the wind wheel of the vertical axis wind turbine via a connection segment, the connection segment includes first bending segments respectively extending from the one ends of the first and second main body components. The first bending segments are parallel to each other, intersected and fixedly connected with each other, or overlapped with each other. When the first bending segments are parallel to each other or intersected and fixedly connected with each other, a reinforcing piece is disposed or no reinforcing piece is disposed between the first bending segments.
When the support connection end is connected to the wheel axle of the wind wheel of the vertical axis wind turbine, the transmission body, or the flange via a connection segment, the connection segment includes second bending segments respectively extending from the other end of the first main body component and the other end of the second main body component. The second bending segments are parallel to each other, intersected and fixedly connected with, each other or overlapped with each other. When the second bending segments are parallel to each other or intersected and fixedly connected with each other, a reinforcing piece is disposed or no reinforcing piece is disposed between the second bending segments.
The cantilever for the vertical axis wind turbine is formed by two sub-cantilevers fixedly connected via a reinforcing piece.
The sub-cantilever includes a first main body component and a second main body component which are fixedly connected via a reinforcing piece. On end of the first main body component and one end of the second main body component are fixedly connected to each other, in contact with each other, or spaced from each other and together form a first end of the sub-cantilever. The other end of the first main body component and the other end of the second main body component are fixedly connected to each other, in contact with each other, or spaced from each other and together form a second end of the sub-cantilever.
The first ends of the two sub-cantilevers are fixedly connected to each other, in contact with each other, or spaced from each other and together form the blade connection end of the cantilever. The second ends of the two sub-cantilevers are fixedly connected to each other, in contact with each other, or spaced from each other and together form the support connection end of the cantilever.
In the sub-cantilever, shapes of the first and second main body components are respectively and independently selected from straight line shape and arc shape. The first and second main body components are aligned vertically or horizontally or diagonally.
The two sub-cantilevers are aligned vertically or horizontally or diagonally.
When the blade connection end is connected to the blade of the wind wheel of the vertical axis wind turbine via a connection segment, the connection segment includes first bending segments respectively extending from one end of the first main body component and one end of the second main body component. The first bending segments are parallel to, intersected and fixedly connected with, or overlapped with each other. When the first bending segments are parallel to or intersected and fixedly connected with each other, a reinforcing piece is disposed or no reinforcing piece is disposed between the first bending segments.
When the support connection end is connected to the wheel axle of the wind wheel of the vertical axis wind turbine, the transmission body, or the flange via a connection segment, the connection segment includes second bending segments respectively extending from the other end of the first main body component and the other end of the second main body component. The second bending segments are parallel to, intersected and fixedly connected with, or overlapped with each other. When the second bending segments are parallel to or intersected and fixedly connected with each other, a reinforcing piece is disposed or no reinforcing piece is disposed between the second bending segments.
The reinforcement is shaped as straight line or X.
When the diagonal tensile piece is used, the diagonal tensile piece adopts a diagonal bracing structure or a bending cantilever structure.
The diagonal bracing structure: the diagonal tensile piece includes a straight line-shaped or arc-shaped main body component. A first bending segment is extended from one end of the main body component and fixedly connected to the wheel axle, the transmission body, or the flange. A second bending segment is extended from the other end of the main body component and fixedly connected to the tensile piece or the horizontal tensile piece.
The bending cantilever structure: the diagonal tensile piece includes a straight line-shaped or arc-shaped main body component. A first bending segment is extended from one end of the main body component and fixedly connected to the wheel axle, the transmission body, or the flange, or one end of the main body component is directly fixedly connected to the wheel axle, the transmission body, or the flange. A second bending segment is extended from the other end of the main body component and connected to the blade via the baffle, or the other end of the main body component is directly connected to the blade via the baffle.
When a horizontal tensile piece is used, the horizontal tensile piece adopts a straight line-shaped cantilever structure.
The straight line-shaped cantilever structure: The horizontal tensile piece includes a straight line-shaped main body component, one end of the main body component is connected to the blade via the baffle or integrated with the baffle. The other end of the main body component is directly fixedly connected to the wheel axle, or a bending segment is extended from the other end of the main body component and fixedly connected to the wheel axle.
When a tensile piece is used, the tensile piece adopts one of a straight form structure, a polygonal structure, and a special-shaped structure.
The straight form structure: The tensile piece includes at least one straight line shaped main body component. The main body component is located between adjacent two blades or two baffles or two diagonal tensile pieces or two cantilevers for the vertical axis wind turbine. Two ends of the main body component are respectively fixedly connected to corresponding baffle or diagonal tensile piece or cantilever for the vertical axis wind turbine.
The polygonal structure: The tensile piece is shaped as a polygon. A vertex of the polygon is corresponding to the blade or the baffle. The vertex of the polygon is fixedly connected to the corresponding baffle or diagonal tensile piece or cantilever for the vertical axis wind turbine.
The special-shaped structure: There is at least one tensile piece respectively located between adjacent two blades or baffles. The tensile piece is formed by two parallel straight line-shaped components or intersected bending line-shaped components which are fixedly connected via a reinforcement rib. The tail end of the straight line-shaped component or the bending line-shaped component is fixedly connected to the corresponding baffle.
When a transmission body is used, the transmission body adopts a structural body to connect with the bearing body and provide a transmitting function, including a cylinder, a circular tube, a flange, a circular ring, a component with a circular inner edge and a polygonal outer edge, or a vertically arranged double-layered or multilayered structural body formed by any combination of the flange and the circular ring and the component with the circular inner edge and the polygonal outer edge.
Two ends of the blade are fixedly connected to or rotatably connected to the corresponding baffle directly;
or
two ends of the blade are respectively fixedly connected to a connecting piece, the connecting piece is a rod-shaped component, and the rod-shaped component is fixedly connected to or rotatably connected to the corresponding baffle;
or
two ends of the blade are respectively fixedly connected to a connecting piece, the connecting piece is a plate, the plate is fixedly connected to or rotatably connected to the corresponding baffle via a mounting shaft; when the plate is rotatably connected to the corresponding baffle, the plate is provided with a connection hole to connect with an output of a power controller directly or in a transmission body way via a connecting rod; the power controller is placed on the corresponding baffle; the power controller is resilient controller or an electric controller;
or
the bearing body is a structure body including at least one of an upright column, a cross-bar, or a truss, vertical shaft;
or
the bearing body is selected from: an upright column or a tower; a cross-bar or a truss rotatably or fixedly connected to a tower or on an upright column; a cross-bar or a truss rotatably or fixedly connected to an upright column or on a tower, and a vertical shaft fixedly connected to the cross-bar or the truss; a floating buoy tower with an upright column; a cross-bar or a truss rotatably or fixedly connected to a floating buoy tower or on an upright column; a cross-bar or a truss rotatably or fixedly connected to a floating buoy tower or on an upright column, and a vertical shaft fixedly connected to the cross-bar or the truss;
or
there is at least one wind wheel; when there are at least two wind wheels, the least two wind wheels include a pair of wind wheels arranged symmetrically at two sides of a symmetry axis or include wind wheels located on a symmetry axis; rotation directions of the pair of wind wheels are opposite.
At first, cantilever type structures of the diagonal tensile piece and the horizontal tensile piece and an integrated structure of the tensile structure will be detailed described.
Next, structures of the wheel frame of the present disclosure will be described.
A first type of wheel frame includes the wheel axle (such as embodiment shown in
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Specific embodiments are described as below.
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The wheel frame of the present disclosure is not limited to the above described. Some components of the wheel frames as shown in
What is described above are embodiments of the present disclosure, although relatively concrete and detailed, they are not intended to limit the scope of the present disclosure. It will be understood by those skilled in the art that various modifications and improvements can be made without departing from the conception of the present disclosure, and all these modifications and improvements are within the scope of the present disclosure. The scope of the present disclosure shall be subject to the claims attached.
Number | Date | Country | Kind |
---|---|---|---|
201610826979.7 | Sep 2016 | CN | national |
201610827019.2 | Sep 2016 | CN | national |
Filing Document | Filing Date | Country | Kind |
---|---|---|---|
PCT/CN2017/083481 | 5/8/2017 | WO | 00 |