The present invention relates generally to an axial flow impeller.
As shown in
A preferred embodiment of the present invention is directed to solve technical problem(s) with regard to low generality of the existing axial flow impeller.
In order to solve the above-described problem, a preferred embodiment of the present invention adopts the following technical solutions:
An axial flow impeller according to a preferred embodiment of the present invention may include a hub and at least three base blades mounted around the hub evenly, in which the at least three base blades are capable of doing work on an external object, and a cover blade is detachably mounted in the front and/or rear of each base blade.
The hub and the base blade may be made of a stainless material. The cover blade may be made of a plastic or stainless material. The thickness of the cover blade may be uniform, and the outer edge of the cover blade may have a smooth transition shape. The shape of the cover blades may conform to the shape of the base blade. The outer edge of the cover blade may be provided with a reinforcing enveloping edge.
When the cover blade may be detachably mounted in the front or rear of the base blade, the outside of outer edge of the base blade will be surrounded with the reinforcing enveloping edge of the cover blade.
Several hooks may be evenly arranged on the cover blade, and several slits cooperating with the several hooks may be arranged on the base blade in positions corresponding to those positions where the several hooks of the cover blade are located.
When the cover blades may be detachably mounted both in the front and in the rear of the base blade, the reinforcing enveloping edges of the two cover blades are contacted and fitted with each other on the opposing sides, such that the base blade will be enclosed within a space formed by the two cover blades.
Several hooks may be evenly arranged on the cover blade positioned in the front or rear of the base blade, and several slits cooperating with the several hooks may be arranged correspondingly on the cover blade positioned in the rear or front of the base blade. The hooks and slits may be arranged on the reinforcing enveloping edges of the cover blades, respectively. The cover blade may be mounted on the base blade by means of several blots and nuts.
It can be seen from the above-mentioned technical solutions that the advantages and beneficial effects of the axial flow impeller according to a preferred embodiment of the present invention lie in that: the axial flow impeller according to a preferred embodiment of the present invention includes the base blades capable of doing work on an external object and the cover blade detachably mounted in the front and/or rear of the base blades. When the axial flow impeller is applied in a medium environment having a high density and viscosity, it will meet the requirement only by virtue of the base blade with the cover blade being removed; when the axial flow impeller is applied in a medium environment having low density and viscosity, the cover blade can be mounted in the front and/or rear of the base blade in order to improve the efficiency of the axial flow impeller. In this case, the consumption of electrical power can be reduced significantly while producing an equivalent propulsive force, thereby being advantageous for energy conservation. Therefore, the axial flow impeller according to a preferred embodiment of the present invention can be adaptable to different medium environments and efficiency requirements, and thus the axial flow impeller can have good adaptability, needs minimal investment cost and can be convenient to use.
The foregoing summary, as well as the following detailed description of the invention, will be better understood when read in conjunction with the appended drawings. For the purpose of illustrating the invention, there are shown in the drawings embodiments which are presently preferred. It should be understood, however, that the invention is not limited to the precise arrangements and instrumentalities shown. In the drawings:
Certain terminology is used in the following description for convenience only and is not limiting. The words “front” and “rear” designate directions in the drawings to which reference is made. Unless specifically set forth herein, the terms “a,” “an” and “the” are not limited to one element, but instead should be read as meaning “at least one.” The terminology includes the words noted above, derivatives thereof and words of similar import. Hereinafter, the particular embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the embodiments described herein are merely used for illustration, but not for the restriction of the invention.
As illustrated in
In the preferred embodiment of the axial flow impeller according to the present invention, a front cover blade 3 can be detachably mounted in the front 21 of each base blade 2, and a rear cover blade 4 can be detachably mounted in the rear 22 of each base blade 2. In the preferred embodiment, the thicknesses of the front and rear cover blades 3, 4 can be reduced gradually from the longitudinal center lines of the front and rear cover blades 3, 4 to the two sides thereof alternatively, the thicknesses of the front and rear cover blades 3, 4 also can be uniform, i.e., the thickness is constant everywhere, and the outer edges of the front and rear cover blades 3, 4 have a smooth transition shape, which will facilitate reducing the operation resistance. Preferably, the shapes of the front and rear cover blades 3, 4 both conform to the shape of the base blade 2, and a front reinforcing enveloping edge 31 can be formed integrally on the outer edge of the front cover blade 3, and a rear reinforcing enveloping edge 41 can be formed integrally on the outer edge of the rear cover blade 4.
The front reinforcing enveloping edge 31 of the front cover blade 3 and the rear reinforcing enveloping edge 41 of the rear cover blade 4 are contacted and fitted with each other on the opposing sides thereof. Moreover, after the front and rear reinforcing enveloping edges 31, 41 are fitted with each other, the resulting whole outer surface has a smooth transition shape. Thus, the base blade 2 is enclosed within a space formed by the front and rear cover blades 3, 4, by means of the front cover blade 3 and the front reinforcing enveloping edge 31 thereof as well as the rear cover blade 4 and the rear reinforcing enveloping edge 41 thereof. Therefore, the shape of the outer surface of the axial flow impeller blade with the front and rear cover blades 3, 4 depends on the shapes of the front and rear cover blades 3, 4 and their respective reinforcing enveloping edges.
In the preferred embodiment, the front and rear cover blades 3, 4 can be detachably mounted on the base blade 2 by means of various manners. For example, the front cover blade 3 or the rear cover blade 4 can be mounted on the base blade 2 by means of several blots and nuts. In addition, the front and rear cover blades 3, 4 can also be mounted by means of engagement of hook and slit.
As illustrated in
In another preferred embodiment of the axial flow impeller according to the present invention, the front cover blade 3 can be merely detachably mounted on the front 21 of each base blade 2; or the rear cover blade 4 can be merely detachably mounted on the rear 22 of each base blade 2. In this case, the reinforcing enveloping edge of the front cover blade 3 or the rear cover blade 4 will surround the outside of the outer edge of the base blade 2, and the outer surface of the reinforcing enveloping edge has a smooth transition shape. The front cover blade 3 or the rear cover blade 4 still can be mounted on the base blade 2 by means of several blots and nuts. When using the hook and slit connection, the hooks are arranged on the edge of a surface of the front cover blade 3 or the rear cover blade 4 in proximity to the base blade 2, and the slits can be directly arranged on the base blade 2. Other structures of this embodiment are identical to that of the first embodiment, and the description thereof will be omitted.
The axial flow propeller according to a preferred embodiment of the present invention takes the base blade 2 as its carrier, and the cover blade(s) can be detachably mounted in the front or rear of the base blade 2, or both in the front and in the rear of the base blade 2 selectively, thereby the outer profile shape of the axial flow impeller blade can be varied by changing the profile of the cover blade, such that single axial flow impeller can provide different efficiencies. Furthermore, in the axial flow propeller according to the present invention, it is also allowable to meet the requirements for different application circumstances by changing the material of the cover blade. For example, the cover blade made of plastic can be used in a liquid with high PH value or containing particular components or municipal sewage or water, and the cover blade made of stainless material can be used in an industry sewage having high density and viscosity.
The axial flow propeller according to the a preferred embodiment of the present invention can be widely applicable to the products, such as a stirrer, a flow impeller, an axial flow device and a submersible circulating pump and the like.
Although the present invention has been described with reference to several typical embodiments, it should be understood that the terms used herein are used for explanation and illustration, and not used as restrictive terms. Since the present invention can be performed in various forms without departing the spirit or the substance of the invention, it should be understood that, the above-described embodiments are not restricted to any detail set forth above, and should be construed within the spirit or the scope defined by the appended claims broadly. Thus, all the modifications and variations falling into the claims and their equivalents should be covered by the appended claims.
It will be appreciated by those skilled in the art that changes could be made to the embodiments described above without departing from the broad inventive concept thereof. It is understood, therefore, that this invention is not limited to the particular embodiments disclosed, but it is intended to cover modifications within the spirit and scope of the present invention as defined by the appended claims.
Number | Date | Country | Kind |
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201010284956.0 | Sep 2010 | CN | national |
This application is a Section 371 of International Application No. PCT/EP2011/065845, filed Sep. 13, 2011, which was published in the English language on Mar. 22, 2012, under International Publication No. WO 2012/035008 A2 and the disclosure of which is incorporated herein by reference.
Filing Document | Filing Date | Country | Kind | 371c Date |
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PCT/EP2011/065845 | 9/13/2011 | WO | 00 | 5/24/2013 |