The present disclosure relates to the field of pump body technologies, and specifically, to a pump body assembly, fluid machinery, and a heat exchange device.
In the related technology, outer surfaces of two sliding blocks are separately in direct contact with an inner surface of a cylinder, and a friction pair is formed at the contact position. During a high-speed operation of a pump body assembly, the two sliding blocks are separately under the action of a centrifugal force. Consequently, the two sliding blocks and an inner wall of the cylinder are stuck tightly together, increasing the contact area therebetween and further increasing a friction force between the sliding blocks and the cylinder, leading to relatively high friction loss of the cylinder of the pump body assembly. Research results indicate that friction power consumption at the contact position between the sliding blocks and the cylinder reaches over 80% of overall mechanical power consumption.
A main objective of the present invention is to provide a pump body assembly, fluid machinery, and a heat exchange device, to solve the problem of relatively high friction loss of a cylinder during the operation of the pump body assembly in the related technology.
To achieve the above objective, according to an aspect of the present disclosure, a pump body assembly is provided, and includes an upper flange; a lower flange; a cylinder, arranged between the upper flange and the lower flange; a sliding block structure, rotatably arranged inside the cylinder, the sliding block structure includes a connecting portion and two sliding sub-blocks arranged on the connecting portion, and the two sliding sub-blocks and an inner wall surface of the cylinder form a first sliding hole; a piston, slidably arranged inside the first sliding hole, where a variable volume cavity is formed between the piston and an inner wall of the cylinder, and the piston has a second sliding hole; and a rotation shaft, where at least a portion of the rotation shaft is slidably arranged inside the second sliding hole, and a slide included angle is formed between a first sliding direction, in which the piston slides relative to the first sliding hole, and a second sliding direction, in which the rotation shaft slides relative to the second sliding hole.
Further, there is at least one connecting portion; the at least one connecting portion is provided with a first through hole; and the rotation shaft passes through the first through hole.
Further the sliding block structure is connected to the lower flange and/or the upper flange by means of pivot.
Further a first connecting portion is arranged on the connecting portion; a second connecting portion is arranged on the lower flange; and the first connecting portion and the second connecting portion are nested and fit to connect the sliding block structure with the lower flange.
Further the first connecting portion is the first through hole; the second connecting portion is a position-limiting protrusion; the position-limiting protrusion extends into the first through hole to enable the sliding block structure to pivot relative to the lower flange; the position-limiting protrusion has a second through hole; and the rotation shaft passes through the second through hole.
Further the position-limiting protrusion is a round protruding platform arranged coaxially with the lower flange; the second through hole and the round protruding platform are eccentrically arranged, and an eccentricity e is fixed; and the cylinder and the lower flange are arranged coaxially.
Further an inner cavity of the cylinder is in a shape of a circular hole; opposite surfaces of the two sliding sub-blocks are surfaces on which the piston slides, and are parallel to each other; and surfaces of the two sliding sub-blocks, which face the inner cavity, fit the shape of the inner cavity.
Further the sliding block structure is manufactured and processed through cutting.
Further an exhaust hole is disposed in a side wall of the cylinder , and the ump body assembly further includes an exhaust valve assembly, wherein the exhaust valve assembly is arranged on an outer surface of the cylinder and is arranged corresponding to the exhaust hole.
According to another aspect of the present disclosure, fluid machinery is provided, and includes the foregoing pump body assembly.
According to another aspect of the present disclosure, a heat exchange device is provided, and includes the foregoing fluid machinery.
In the technical solutions of the present disclosure, during the operation of the pump body assembly, at least a portion of the rotation shaft fits the second sliding hole of the piston and drives the piston to move, so that the piston performs a reciprocating motion along the first sliding direction relative to the rotation shaft. When the piston moves relative to the rotation shaft, the piston slides inside the first sliding hole simultaneously, and the sliding block structure is driven by the piston to move, so that the piston performs a reciprocating motion along the second sliding direction relative to the sliding block structure. The slide included angle is formed between the first sliding direction and the second sliding direction, and the piston performs a superposition movement along the first sliding direction and the second sliding direction, so the volume distribution of the variable volume cavity can be changed during the movement of the piston, thereby implementing intake, compression, and exhausting operations of the pump body assembly, and ensuring the normal operation of the pump body assembly.
In this case, the sliding block structure is an integral structure, and the two sliding sub-blocks are both arranged on the connecting portion. Compared with arrangement of two separated sliding blocks in the related technology, the foregoing structure arrangement of the sliding block structure in this application avoids the relatively high friction loss between the sliding block structure and the cylinder caused by the centrifugal forces, thereby reducing the friction loss of the cylinder, prolonging the service life of the pump body assembly, and improving the working efficiency of the pump body assembly.
The accompanying drawings attached to the specification form a part of the present application and are intended to provide a further understanding of the present disclosure. The illustrative embodiments of the present disclosure and the description thereof are used for explanations of the present disclosure, and do not constitute improper limitations of the present disclosure. In the accompanying drawings:
The foregoing accompanying drawings include following reference numerals:
10. upper flange; 20. lower flange; 21. position-limiting protrusion; 211. second through hole; 30. cylinder; 31. first sliding hole; 32. inner cavity; 33. exhaust hole; 34. suction passage; 40. sliding block structure; 41. connecting portion; 411. first through hole; 42. sliding sub-block; 50. piston; 51. second sliding hole; 60. rotation shaft; 61. cylindrical section; 62. sliding section; 70. exhaust valve assembly; 90. liquid separator part; 100. housing assembly; 110. motor assembly; 120. pump body assembly; 130. upper cover assembly; 140. lower cover and installing plate.
It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other if no conflicts occur. The present disclosure will be described in detail below with reference to the accompanying drawings in combination with the embodiments.
It should be noted that, unless otherwise indicated, all technical and scientific terms used herein have the same meanings as commonly understood by the ordinary skilled in the art of the present application.
In the present disclosure, unless stated to the contrary, the orientation words such as “up, down” are usually used to refer to the orientations shown in the drawings, or to the component itself in the vertical, orthographic or gravity direction. Similarly, in order to facilitate the understanding and the description, “left, right” are usually used to refer to the left and right shown in the drawings, and “inner” and “outer” refer to “inner” and “outer” relative to the outline of each component itself. However, the orientation words are not given to limit the present application.
To solve the problem of relatively high friction loss of a cylinder during the operation of a pump body assembly in the related technology, a pump body assembly, fluid machinery, and a heat exchange device are provided in this application.
As shown in
During the operation of the pump body assembly, at least a portion of the rotation shaft 60 fits the second sliding hole 51 of the piston 50 and drives the piston 50 to move, so that the piston 50 performs a reciprocating motion along the first sliding direction relative to the rotation shaft 60. When the piston 50 moves relative to the rotation shaft 60, the piston 50 slides inside the first sliding hole 31, and the sliding block structure 40 is driven by the piston 50 to move, so that the piston 50 performs a reciprocating motion along the second sliding direction relative to the sliding block structure 40. Because the slide included angle is formed between the first sliding direction and the second sliding direction, and the piston 50 performs a superposition motion of the first sliding direction and the second sliding direction, a volume distribution of the variable volume cavity can be changed during the motion of the piston 50, thereby implementing intake, compression, and exhausting operations of the pump body assembly, and ensuring normal operation of the pump body assembly.
In this case, the sliding block structure 40 is an integral structure, and the two sliding sub-blocks 42 are both arranged on the connecting portion 41. Compared with arrangement of two separated sliding blocks in the related technology, the foregoing structure arrangement of the sliding block structure 40 in these embodiments can avoid relatively high friction loss between the sliding block structure 40 and the cylinder 30 caused by a centrifugal force, and the friction loss of the cylinder 30 is therefore reduced, thereby prolonging the service life of the pump body assembly, and improving the working efficiency of the pump body assembly.
In these embodiments, the two separated sliding sub-blocks 42 are connected together via the connecting portion 41, so that centrifugal forces of the two sliding sub-blocks 42 counteract each other during the operation of the pump body assembly, and a force exerted between the sliding block structure 40 and the inner wall of the cylinder 30 is reduced, thereby reducing friction power consumption between the sliding block structure 40 and the cylinder 30.
In these embodiments, the variable volume cavity includes two cavities. In the process while the piston 50 moves relative to the cylinder 30, volumes of the two cavities constantly change, thereby implementing intake, compression, and exhausting operations of the pump body assembly, and ensuring normal operation of the pump body assembly. Specifically, each cavity is formed by an arc surface of the piston 50 and the inner wall of the cylinder 30.
As shown in
The operation of the pump body assembly is described in detail below.
As shown in
Optionally, there is at least one connecting portion 41, and the connecting portion 41 is provided with a first through hole 411 for the rotation shaft 60 to pass through. As shown in
It should be noted that the quantity and position of the connecting portion 41 are not limited thereto. Optionally, there are two connecting portions 41, and the two connecting portions 41 are respectively arranged at two ends of the sliding sub-block 42.
As shown in
In other embodiments not shown in the accompanying drawings, the sliding block structure is connected to the upper flange by means of pivot. Specifically, during the operation of the pump body assembly, at least a portion of the rotation shaft fits the second sliding hole of the piston and drives the piston to move, so that the piston performs a reciprocating motion along the first sliding direction relative to the rotation shaft. While the piston is moving relative to the rotation shaft, the piston slides inside the first sliding hole simultaneously, and the sliding block structure is driven by the piston to rotate relative to the upper flange, so that the piston performs a reciprocating motion along the second sliding direction relative to the sliding block structure. The volume distribution of the variable volume cavity can be changed during the movement of the piston, thereby realizing intake, compression, and exhausting operations of the pump body assembly, and ensuring normal operation of the pump body assembly.
In other embodiments not shown in the accompanying drawings, the sliding block structure is connected to the upper flange and the lower flange by means of pivot. Specifically, during the operation of the pump body assembly, at least a portion of the rotation shaft fits the second sliding hole of the piston and drives the piston to move, so that the piston performs a reciprocating motion along the first sliding direction relative to the rotation shaft. While the piston is moving relative to the rotation shaft, the piston slides inside the first sliding hole simultaneously, and the sliding block structure is driven by the piston to rotate relative to the upper flange and the lower flange, so that the piston performs a reciprocating motion along the second sliding direction relative to the sliding block structure. The volume distribution of the variable volume cavity can be changed during the movement of the piston, thereby realizing intake, compression, and exhausting operations of the pump body assembly, and ensuring normal operation of the pump body assembly.
In some embodiments, a first connecting portion is arranged on the connecting portion 41; a second connecting portion is arranged on the lower flange 20; and the first connecting portion and the second connecting portion are nested and fit to connect the sliding block structure 40 with the lower flange 20. Specifically, the first connecting portion and the second connecting portion are nested and fit to implement assembly of the sliding block structure 40 and the lower flange 20, so that the inner structure of the cylinder 30 is more compact, and a structural arrangement is more reasonable. The foregoing structure is simple and easy to assemble and implement.
As shown in
In other embodiments not shown in the accompanying drawings, the first connecting portion is the position-limiting protrusion, and the second connecting portion is the first through hole. The position-limiting protrusion extends into the first through hole to enable the sliding block structure to pivot relative to the lower flange. The position-limiting protrusion has a second through hole. The rotation shaft passes through the second through hole. The foregoing structure arrangement makes the structure of the sliding block structure and the structure of the lower flange simpler, and easy to process and assemble.
As shown in
In these embodiments, through the foregoing structure arrangement, the eccentricity e of the pump body assembly is determined, so that a control manner of the eccentricity e is easier to ensure, simple and reliable.
As shown in
Optionally, the sliding block structure 40 is symmetrical. In this case, during the operation of the pump body assembly, the foregoing arrangement enables the centrifugal forces of the two sliding sub-blocks 42 to counteract each other, thereby reducing the friction loss between the sliding block structure 40 and the inner wall of the cylinder 30, and prolonging the service life of the sliding block structure 40 and the cylinder 30.
In some embodiments, the sliding block structure 40 is manufactured and processed through cutting. In this case, the foregoing arrangement can ensure that the sliding block structure 40 is an integral structure, and that the friction loss between the two sliding sub-blocks 42 and the cylinder 30 caused by the centrifugal forces is reduced. At the same time, the foregoing processing manner makes the sliding block structure 40 simpler and easier to process, thereby reducing labor intensity of staff
Specifically, the sliding block structure 40 is a cylinder structure with a certain roughness requirement and is hollowed out along a radial direction and an axial direction. A size and a shape of a hollow part along the radial direction are identical with the size and the shape of the piston 50, so that the remaining structure is two sliding sub-blocks 42. A hollow part along the axial direction is a circular hole coaxial with the outer circle of the sliding block structure 40.
As shown in
As shown in
Specifically, a motor of the pump body assembly drives the rotation shaft 60 to rotate along a central axis of the rotation shaft 60. The cylindrical section 61 rotates relative to the upper flange 10, and drives the sliding section 62 to rotate simultaneously, so that the two rotation shaft sliding surfaces of the sliding section 62 fit the groove wall of the second sliding hole 51, and that the piston 50 is driven by the rotation shaft 60 to perform a reciprocating slide along the second sliding direction.
In some embodiments, a lubrication groove is provided on each rotation shaft sliding surface. The lubrication groove is connected to a center hole of the rotation shaft 60 through an oil passage hole. An outer surface of the rotation shaft 60 is connected to an inner surface of the center hole through the oil passage hole. In this case, during the rotation of the rotation shaft 60, lubricating oil flows from the center hole into the lubrication groove through the oil passage hole, thereby ensuring that the lubricating oil can smoothly flow from the center hole into the lubrication groove, and lubricating the rotation shaft sliding surfaces. The foregoing arrangement guarantees the convenience of oiling from the center hole, and effectively avoids the friction loss caused by excessively large friction between the rotation shaft 60 and the piston 50, thereby improving movement smoothness of the rotation shaft 60 and the piston 50.
As shown in
In some embodiments, an outlet of the suction passage 34 is arc-shaped. The arc-shaped outlet can not only weaken the gas vortex phenomenon, but also reduce noise generated during intake, thereby improving user's use experience. The foregoing structure is simple and easy to process.
Specifically, by using one of the cavities as an example, the intake, compression, and exhausting process of the pump body assembly is described as follows: when the cavity is in communication with the suction passage 34, gas enters the variable volume cavity through the outlet, and suction starts; the rotation shaft 60 continues to drive the piston 50 and the sliding block structure 40 to rotate clockwise; when the cavity is separated from the suction passage 34, the whole suction ends; in this case, the cavity is completely sealed, and compression starts; the piston 50 continues to rotate, and the gas is constantly being compressed; when the cavity is in communication with the exhaust hole 33, the gas is exhausted through the exhaust hole 33; the piston 50 continues to rotate, and the gas is constantly being compressed and exhausted at the same time, till the cavity is completely separated from the exhaust hole 33, to complete the entire intake, compression, and exhausting process; and subsequently, after rotating for a certain angle, the cavity is connected to the suction passage 34 again, to enter a next cycle.
In the pump body assembly in these embodiments, the assembly process of the pump body assembly is specifically as follows:
The sliding block structure 40 is placed into the cylinder 30 first, and the first through hole 411 of the sliding block structure 40 fits the round protruding platform of the lower flange 20. A lower end of the rotation shaft 60 extends into the second sliding hole 51 of the piston 50, and the rotation shaft 60 fits the round protruding platform of the lower flange 20. Then, the piston 50 is installed inside a radial hole of the sliding block structure having a same shape as the piston 50. Then, the cylinder 30 is sleeved on an integral structure formed by the rotation shaft 60, the piston 50, the sliding block structure 40 and the exhaust valve assembly 70. Finally, the upper flange 10 and the lower flange 20 are connected to the cylinder 30 through fasteners to complete the assembly of the pump body assembly.
As shown in
Optionally, the foregoing parts are connected by means of welding, thermal sleeving, or cold pressing.
A heat exchange device (not shown) is further provided in this application and includes the foregoing fluid machinery. Optionally, the heat exchange device is an air conditioner.
In view of the above description, it can be seen that, the foregoing embodiments of the present disclosure achieve the following technical effects.
During the operation of the pump body assembly, at least a portion of the rotation shaft fits the second sliding hole of the piston and drives the piston to move, so that the piston performs a reciprocating motion along the first sliding direction relative to the rotation shaft. When the piston moves relative to the rotation shaft, the piston slides inside the first sliding hole simultaneously, and the sliding block structure is driven by the piston to move, so that the piston performs a reciprocating motion along the second sliding direction relative to the sliding block structure. The slide included angle is formed between the first sliding direction and the second sliding direction, and the piston performs a superposition motion of the first sliding direction and the second sliding direction, so the volume distribution of the variable volume cavity can be changed during the movement of the piston, thereby implementing intake, compression, and exhausting operations of the pump body assembly, and ensuring the normal operation of the pump body assembly.
In this case, the sliding block structure is an integral structure, and the two sliding sub-blocks are both arranged on the connecting portion. Compared with arrangement of two separated sliding blocks in the related technology, the foregoing structure arrangement of the sliding block structure in this application avoids the relatively high friction loss between the sliding block structure and the cylinder caused by the centrifugal forces, thereby reducing the friction loss of the cylinder, prolonging the service life of the pump body assembly, and improving the working efficiency of the pump body assembly.
Apparently, the embodiments described above are merely part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present disclosure.
It should be noted that terms used herein are only for the purpose of describing specific embodiments and not intended to limit the exemplary embodiments of the disclosure. The singular of a term used herein is intended to include the plural of the term unless the context otherwise specifies. In addition, it should also be appreciated that when terms “include” and/or “comprise” are used in the description, they indicate the presence of features, steps, operations, devices, components and/or their combination.
It should be noted that the terms “first”, “second”, and the like in the description, claims and drawings of the present disclosure are used to distinguish similar objects, and are not necessarily used to describe a specific order or time order. It should be appreciated that such terms can be interchangeable if appropriate, so that the embodiments of the disclosure described herein can be implemented, for example, in an order other than those illustrated or described herein.
The above descriptions are merely some embodiments of the present disclosure, and are not intended to limit the present disclosure. For those skilled in the art, various modifications and changes can be made for the present disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the spirits and the principles of the present disclosure are included within the scope of the present disclosure.
Number | Date | Country | Kind |
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201810792233.8 | Jul 2018 | CN | national |
Filing Document | Filing Date | Country | Kind |
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PCT/CN2018/120659 | 12/12/2018 | WO | 00 |