Pump components, fluid machinery and heat exchange equipment

Abstract

The present invention provides a pump body assembly, a fluid machinery and a heat exchange device. The pump body assembly includes a cylinder sleeve, a cylinder and a piston. The cylinder is rotatably arranged in the cylinder sleeve, and the piston is slidably arranged in the cylinder. The pump body assembly also includes: a rotating shaft, including a matching section, the matching section is passed through the piston to drive the piston to move, and the outer surface of the matching section has two first matching planes arranged in parallel, and the first matching planes are in contact with the piston so that the rotating shaft drives the piston to move; the rotating shaft has an axial oil hole, and each first matching plane has a first oil groove, which is connected to the axial oil hole, and the extension direction of the first oil groove is perpendicular to the extension direction of the rotating shaft. The present invention effectively solves the problem that the piston and the rotating shaft of the rotary cylinder compressor in the prior art are prone to jamming, which affects the normal operation of the rotary cylinder compressor.

Description

Technical Field

[0001] The present invention relates to the technical field of pump body components, and in particular to a pump body component, a fluid machine and a heat exchange device. Background Art

[0002] At present, the rotary cylinder piston compressor is a compressor of a completely new structure. In essence, it adopts a cross slider structure principle, combines the main structure of the piston compressor with the main structure of the rotor compressor, and is a compressor obtained. The existing rotary cylinder piston compressor includes a rotating shaft, a piston sleeved outside the rotating shaft, and a cylinder sleeved outside the piston. When the rotating shaft rotates, it drives the piston to perform circular motion. The distance between the piston and the center of the cylinder runs in the range of 0 to e. The rotating shaft and the cylinder are eccentrically assembled, and the rotating shaft drives the cylinder to rotate through the piston. Due to the eccentric relationship between the rotating shaft and the cylinder, during operation, the rotating shaft and the cylinder rotate around their respective axes respectively, and the piston reciprocates relative to the cylinder to achieve gas compression.

[0003] However, in the prior art, during the reciprocating motion of the piston relative to the rotating shaft, a jamming phenomenon is likely to occur between the piston and the rotating shaft, thereby affecting the normal operation of the rotary cylinder piston compressor and increasing the energy consumption of the rotary cylinder compressor. Summary of the invention

[0004] The main purpose of the present invention is to provide a pump body assembly, a fluid machine and a heat exchange device to solve the problem in the prior art that the piston and the rotating shaft of the rotary cylinder compressor are prone to jamming, which affects the normal operation of the rotary cylinder compressor.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a pump body assembly is provided, including a cylinder liner, a cylinder and a piston, the cylinder is rotatably arranged in the cylinder liner, and the piston is slidably arranged in the cylinder, and the pump body assembly also includes: a rotating shaft, including a mating section, the mating section is penetrated in the piston to drive the piston to move, the outer surface of the mating section has two first mating planes arranged in parallel, the first mating planes are in contact with the piston, so that the rotating shaft drives the piston to move; the rotating shaft has an axial oil hole, each first mating plane has a first oil groove, the first oil groove is connected to the axial oil hole, and the extension direction of the first oil groove is perpendicular to the extension direction of the rotating shaft.

[0006] Furthermore, the mating section is a columnar structure, and the outer peripheral surface of the columnar structure includes two first mating planes, a first arcuate surface and a second arcuate surface; the first arcuate surface and the second arcuate surface are arranged opposite to each other and between the two first mating planes; wherein the first end of the first oil groove extends to the first arcuate surface, and / or the second end of the first oil groove extends to the second arcuate surface.

[0007] Furthermore, each first mating plane also has a second oil groove, which is connected to the axial oil hole and the first oil groove, and the first oil groove is connected to the axial oil hole through the second oil groove; the extension direction of the second oil groove is set at a first angle with the extension direction of the first oil groove.

[0008] Furthermore, the mating section has a radial oil hole, which is connected to the axial oil hole; the bottom of the second oil groove has an oil hole, which is connected to the axial oil hole through the radial oil hole, so that the lubricating fluid discharged from the oil hole flows into the second oil groove.

[0009] Further, the radial oil through hole and the oil through hole are coaxially arranged, or the central axis direction of the radial oil through hole and the central axis direction of the oil through hole are arranged parallel to each other.

[0010] Further, the orthographic projection of the radial oil through hole on the first matching plane is the first projection, the orthographic projection of the oil through hole on the first matching plane is the second projection, and the first projection is within the second projection.

[0011] Furthermore, an extension direction of the radial oil through hole and an extension direction of the oil through hole are arranged at a second angle.

[0012] Furthermore, there are a plurality of first oil grooves, and the plurality of first oil grooves are arranged at intervals along the central axis direction of the rotating shaft.

[0013] Furthermore, the piston has a second matching plane matching with the first matching plane, and at least one of the second matching planes has an oil storage groove, which is connected to the first oil groove and / or the second oil groove.

[0014] Furthermore, the oil storage tank includes: a first tank section, the extension direction of the first tank section is consistent with the extension direction of the rotating shaft; and / or a second tank section, the extension direction of the second tank section and the extension direction of the rotating shaft are arranged perpendicular to each other; and / or a third tank section, the extension direction of the third tank section and the extension direction of the rotating shaft are arranged at a third angle, and the third angle is less than 90°.

[0015] Furthermore, the matching section is a prism structure, and two surfaces of the prism structure that are arranged parallel to each other are two first matching planes.

[0016] Furthermore, the pump body assembly also includes an upper flange, the rotating shaft also includes a long axis section, the long axis section is connected to the mating section and is inserted into the upper flange, the cylinder has a first extension portion extending toward the upper flange, and the pump body assembly also includes: an upper limit plate, which is arranged between the upper flange and the cylinder sleeve, the first extension portion extends into the upper limit plate, and the upper limit plate and the first extension portion limit stop to prevent the cylinder from radially displacing relative to the upper limit plate.

[0017] Furthermore, the rotating shaft also includes a short shaft section, which is connected to the long shaft section through a mating section. The pump body assembly also includes a lower flange, and the short shaft section is inserted into the lower flange. The cylinder has a second extension portion extending toward the lower flange. The pump body assembly also includes: a lower limit plate, which is arranged between the lower flange and the cylinder sleeve, and the second extension portion extends into the lower limit plate. The lower limit plate and the second extension portion limit stops to prevent the cylinder from radially displacing relative to the lower limit plate.

[0018] According to another aspect of the present invention, a fluid machine is provided, comprising a housing and a pump body assembly located in the housing, wherein the pump body assembly is the above-mentioned pump body assembly.

[0019] According to another aspect of the present invention, a heat exchange device is provided, comprising the above-mentioned fluid machinery.

[0020] By applying the technical solution of the present invention, the rotating shaft rotates around its central axis, the matching section of the rotating shaft drives the piston to move, and the piston drives the cylinder to rotate around the central axis of the cylinder, so that the piston reciprocates relative to the cylinder and the rotating shaft at the same time, thereby realizing the suction, compression and exhaust actions of the pump body assembly. In this way, during the operation of the pump body assembly, the first matching plane contacts the piston so that the rotating shaft drives the piston to move. The lubricating liquid enters the rotating shaft through the axial oil hole, and the lubricating liquid entering the axial oil hole flows into the first oil groove to lubricate the first matching plane and the piston, avoiding the occurrence of jamming between the piston and the rotating shaft, thereby solving the problem of the piston and the rotating shaft of the rotary cylinder compressor in the prior art that the jamming phenomenon is easy to occur and affects the normal operation of the rotary cylinder compressor. At the same time, the extension direction of the first oil groove is perpendicular to the extension direction of the rotating shaft, so that the lubricating liquid can flow in the piston, thereby reducing the friction between the piston and the rotating shaft, and achieving a good friction reduction effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0022] Figure 1 An exploded view of an embodiment of a pump assembly according to the present invention is shown;

[0023] Figure 2 Shows Figure 1 A cross-sectional view of a pump assembly in FIG.

[0024] Figure 3 Shows Figure 1 A schematic diagram of the three-dimensional structure of the rotating shaft of the pump assembly;

[0025] Figure 4 Shows Figure 3 A bottom view of the rotating shaft in FIG.

[0026] Figure 5 Shows Figure 3 A cross-sectional view of the rotating shaft in FIG.

[0027] Figure 6 Shows Figure 5 An enlarged schematic diagram of the rotating shaft at B;

[0028] Figure 7 Shows Figure 1 A schematic diagram of the three-dimensional structure of the rotating shaft and piston of the pump body assembly after assembly;

[0029] Figure 8 Shows Figure 7 AA section view of the rotating shaft and the piston after assembly;

[0030] Fig. 9 Shows Figure 7 A partial cross-sectional view of the piston in FIG.

[0031] Fig.10 Shows Figure 1 a cross-sectional view of a cylinder of a pump assembly in FIG. 1 ; and

[0032] Fig.11 Shows Fig.10 Top view of the cylinder in FIG.

[0033] The above drawings include the following reference numerals:

[0034] 10. Cylinder liner; 20. Cylinder; 21. First extension; 22. Second extension; 30. Piston; 31. Second matching plane; 311. First groove section; 312. Second groove section; 313. Third groove section; 40. Rotating shaft; 41. Matching section; 411. First matching plane; 4111. First oil groove; 4112. Second oil groove; 4112a. Oil hole; 412. First arc surface; 413. Second arc surface; 414. Radial oil hole; 42. Major axis section; 43. Minor axis section; 44. Axial oil hole; 50. Upper flange; 60. Lower flange; 70. Upper limit plate; 80. Lower limit plate; 91. First chamber; 92. Second chamber. DETAILED DESCRIPTION

[0035] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0036] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0037] In the present invention, unless otherwise specified, the directional words used, such as "up" and "down", usually refer to the directions shown in the drawings, or to the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above directional words are not used to limit the present invention.

[0038] In order to solve the problem in the prior art that a piston and a rotating shaft of a rotary cylinder compressor are prone to jamming, thus affecting the normal operation of the rotary cylinder compressor, the present application provides a pump body assembly, a fluid machine and a heat exchange device.

[0039] like Figures 1 to 3 As shown, the pump body assembly includes a cylinder sleeve 10, a cylinder 20 and a piston 30, wherein the cylinder 20 is rotatably disposed in the cylinder sleeve 10, and the piston 30 is slidably disposed in the cylinder 20, and the pump body assembly also includes a rotating shaft 40. The rotating shaft 40 includes a matching section 41, which is inserted into the piston 30 to drive the piston 30 to move, and the outer surface of the matching section 41 has two first matching planes 411 arranged in parallel, and the first matching planes 411 are in contact with the piston 30, so that the rotating shaft 40 drives the piston 30 to move. The rotating shaft 40 has an axial oil hole 44, and each first matching plane 411 has a first oil groove 4111, which is connected to the axial oil hole 44, and the extension direction of the first oil groove 4111 is perpendicular to the extension direction of the rotating shaft 40.

[0040] By applying the technical solution of this embodiment, the rotating shaft 40 rotates around its central axis, the matching section 41 of the rotating shaft 40 drives the piston 30 to move, and the piston 30 drives the cylinder 20 to rotate around the central axis of the cylinder 20, so that the piston 30 reciprocates relative to the cylinder 20 and the rotating shaft 40 at the same time, thereby realizing the suction, compression and exhaust actions of the pump body assembly. In this way, during the operation of the pump body assembly, the first matching plane 411 contacts the piston 30 so that the rotating shaft 40 drives the piston 30 to move. The lubricating liquid enters the rotating shaft 40 through the axial oil hole 44, and the lubricating liquid entering the axial oil hole 44 flows into the first oil groove 4111 to lubricate the first matching plane 411 and the piston 30, avoiding the occurrence of a jamming phenomenon between the piston 30 and the rotating shaft 40, thereby solving the problem that the piston and the rotating shaft of the rotary cylinder compressor in the prior art are prone to jamming and affecting the normal operation of the rotary cylinder compressor. At the same time, the extension direction of the first oil groove 4111 is perpendicular to the extension direction of the rotating shaft 40, so that the lubricating fluid can flow in the piston 30, thereby reducing the friction between the piston 30 and the rotating shaft 40, and achieving a good friction reduction effect.

[0041] like Figure 3As shown, the mating section 41 is a columnar structure, and the outer peripheral surface of the columnar structure includes two first mating planes 411, a first arcuate surface 412, and a second arcuate surface 413. The first arcuate surface 412 and the second arcuate surface 413 are arranged opposite to each other and between the two first mating planes 411. Among them, the first end of the first oil groove 4111 extends to the first arcuate surface 412, and the second end of the first oil groove 4111 extends to the second arcuate surface 413. In this way, the above arrangement increases the length of the first oil groove 4111 as much as possible, so that there is sufficient lubricating liquid on the first mating plane 411, further reducing the friction between the piston 30 and the rotating shaft 40, and improving the lubricating effect of the lubricating liquid.

[0042] Specifically, during the reciprocating motion of the piston 30 relative to the rotating shaft 40, a first chamber 91 is formed between the first arcuate surface 412 and the inner wall of the piston 30, and a second chamber 92 is formed between the second arcuate surface 413 and the inner wall of the piston 30. The above-mentioned setting of the first oil groove 4111 can realize the connection between the first chamber 91 and the second chamber 92, and the lubricating liquid entering the first oil groove 4111 can enter the first chamber 91 and the second chamber 92 respectively through its two ends, and the lubricating liquid can circulate rapidly in the first chamber 91 and the second chamber 92. On the one hand, the contact surface between the piston 30 and the first mating plane 411 is well reduced in friction and lubricated, thereby reducing the energy consumption of the pump body assembly during operation; on the other hand, it prevents the generation of lubricating liquid pressure (oil pressure) in the first chamber 91 or the second chamber 92 from affecting the normal movement of the piston 30, thereby improving the operating reliability of the pump body assembly.

[0043] In other embodiments not shown in the drawings, only the first end of the first oil groove extends to the first arc-shaped surface. In this way, the above arrangement increases the length of the first oil groove as much as possible, so that there is sufficient lubricating liquid on the first matching plane, further reducing the friction between the piston and the rotating shaft, and improving the lubricating effect of the lubricating liquid.

[0044] In other embodiments not shown in the drawings, only the second end of the first oil groove extends to the second arc-shaped surface. In this way, the above arrangement increases the length of the first oil groove as much as possible, so that there is sufficient lubricating liquid on the first matching plane, further reducing the friction between the piston and the rotating shaft, and improving the lubricating effect of the lubricating liquid.

[0045] like Figure 3 , Figure 7 and Figure 8As shown, each first mating plane 411 also has a second oil groove 4112, and the second oil groove 4112 is connected to both the axial oil hole 44 and the first oil groove 4111, and the first oil groove 4111 is connected to the axial oil hole 44 through the second oil groove 4112. The extension direction of the second oil groove 4112 is arranged at a first angle to the extension direction of the first oil groove 4111. In this way, the above arrangement can further increase the amount of lubricating fluid on the first mating plane 411, thereby achieving good lubrication between the piston 30 and the mating section 41, and reducing the energy consumption of the pump body assembly.

[0046] Specifically, the first angle is 90°, the first oil groove 4111 and the second oil groove 4112 are cross-arranged and interconnected, and the lubricating fluid entering the first oil groove 4111 can flow into the second oil groove 4112, so that there is sufficient lubricating fluid on the first mating plane 411, thereby improving the lubricating effect of the lubricating fluid.

[0047] Optionally, the first end of the second oil groove 4112 extends to the first end surface of the columnar structure, and the second end of the second oil groove 4112 extends to the second end surface of the columnar structure, thereby increasing the length of the second oil groove 4112 as much as possible so that there is sufficient lubricating fluid on the first mating plane 411, further reducing the friction between the piston 30 and the rotating shaft 40 and improving the lubricating effect of the lubricating fluid.

[0048] like Figures 3 to 6 As shown, the mating section 41 has a radial oil hole 414, which is connected to the axial oil hole 44. The bottom of the second oil groove 4112 has an oil hole 4112a, which is connected to the axial oil hole 44 through the radial oil hole 414, so that the lubricating fluid discharged from the oil hole 4112a flows into the second oil groove 4112. In this way, the above arrangement ensures that the lubricating fluid entering the axial oil hole 44 can smoothly enter the first oil groove 4111 and the second oil groove 4112, improves the smoothness of the lubricating fluid circulation in the pump body assembly, and further ensures that the lubricating fluid can reduce friction and lubricate the contact surface between the first mating plane 411 and the piston 30. At the same time, the above structure is simple in structure, easy to process and realize, and reduces the processing cost of the mating section 41.

[0049] Specifically, each first mating plane 411 has a second oil groove 4112, and there are two radial oil holes 414, which are arranged one-to-one with the two second oil grooves 4112. The lubricating liquid entering the axial oil hole 44 enters the two radial oil holes 414 respectively, and the lubricating liquid in each radial oil hole 414 enters the oil hole 4112a of the corresponding second oil groove 4112, and enters the second oil groove 4112 through the oil hole 4112a. Afterwards, the lubricating liquid entering the second oil groove 4112 flows into the first oil groove 4111, so that the first mating plane 411 has sufficient lubricating liquid.

[0050] like Figure 6 As shown, the central axis direction of the radial oil hole 414 is parallel to the central axis direction of the oil hole 4112a. Thus, the above arrangement makes the processing of the radial oil hole 414 and the oil hole 4112a easier and more convenient, and reduces the processing cost of the matching section 41.

[0051] Specifically, the two radial oil holes 414 are arranged parallel to each other, so that the internal force of the mating section 41 is more uniform, the structural strength of the mating section 41 is improved, and the service life of the mating section 41 and the rotating shaft 40 is extended. The central axis direction of the radial oil hole 414 is arranged perpendicular to the first mating plane 411, and the groove width of the second oil groove 4112 is greater than the inner diameter of the radial oil hole 414, so that the structural profile of the intersection of the second oil groove 4112 and the radial oil hole 414 is simpler, so as to reduce the sharpness of the structural profile, improve the structural strength of the mating section 41, and improve the structural reliability of the mating section 41.

[0052] It should be noted that the positional relationship between the central axis direction of the radial oil hole 414 and the central axis direction of the oil hole 4112a is not limited thereto. Optionally, the radial oil hole 414 and the oil hole 4112a are coaxially arranged.

[0053] like Figure 6 As shown, the orthographic projection of the radial oil hole 414 on the first mating plane 411 is the first projection, and the orthographic projection of the oil hole 4112a on the first mating plane 411 is the second projection, and the first projection is within the second projection. Specifically, the inner diameter of the radial oil hole 414 is D1, and the inner diameter of the oil hole 4112a is D2, and D2 is less than D1, so that the intersection of the radial oil hole 414 and the oil hole 4112a forms a simple structural profile, thereby reducing the burrs generated during the processing of the mating section 41, reducing the difficulty of burr grinding, and improving the reliability of the shaft 40.

[0054] It should be noted that in other embodiments not shown in the drawings, the extension direction of the radial oil hole is arranged at a second angle to the extension direction of the oil hole. Optionally, the two radial oil holes are arranged coaxially. In this way, the above arrangement makes it easier and simpler for the staff to process the two radial oil holes, reduces the processing difficulty, and shortens the processing cycle.

[0055] Optionally, there are multiple first oil grooves 4111, and the multiple first oil grooves 4111 are arranged at intervals along the central axis direction of the rotating shaft 40. In this way, the above arrangement further ensures that there is sufficient lubricating fluid between the first matching plane 411 and the piston 30, thereby reducing the friction between the piston 30 and the rotating shaft 40, reducing the wear degree of the piston 30 and the rotating shaft 40, and extending the service life of the pump body assembly.

[0056] like Fig. 9 As shown, the piston 30 has a second mating plane 31 mating with the first mating plane 411, and at least one of the second mating planes 31 has an oil storage groove, which is connected to the first oil groove 4111 and the second oil groove 4112. In this way, the lubricating liquid entering the first oil groove 4111 and the second oil groove 4112 can be stored in the oil storage groove, and even if the lubricating liquid supply is insufficient, sufficient lubricating liquid can be provided between the first mating plane 411 and the second mating plane 31, thereby improving the lubricating effect of the lubricating liquid.

[0057] like Fig. 9 As shown, the oil storage tank includes a first tank section 311, a second tank section 312 and a third tank section 313. The extension direction of the first tank section 311 is consistent with the extension direction of the rotating shaft 40. The extension direction of the second tank section 312 and the extension direction of the rotating shaft 40 are arranged perpendicular to each other. The extension direction of the third tank section 313 and the extension direction of the rotating shaft 40 are arranged at a third angle, and the third angle is less than 90°. In this way, during the reciprocating motion of the piston 30 relative to the rotating shaft 40, the lubricating liquid in the first oil tank 4111 can enter the second tank section 312, and the lubricating liquid in the second oil tank 4112 can enter the first tank section 311 and the third tank section 313, so that the lubricating liquid is stored in the first tank section 311, the second tank section 312 and the third tank section 313, thereby ensuring that there is sufficient lubricating liquid between the first mating plane 411 and the second mating plane 31.

[0058] In other embodiments not shown in the drawings, the oil storage tank only includes the first tank section, and the extension direction of the first tank section is consistent with the extension direction of the shaft. In this way, during the reciprocating motion of the piston relative to the shaft, the lubricating liquid in the second oil tank can enter the first tank section, so that the lubricating liquid is stored in the first tank section, thereby ensuring that there is sufficient lubricating liquid between the first mating plane and the second mating plane.

[0059] In other embodiments not shown in the drawings, the oil storage tank only includes the second tank section, and the extension direction of the second tank section is consistent with the extension direction of the shaft. In this way, during the reciprocating motion of the piston relative to the shaft, the lubricating liquid in the first oil tank can enter the second tank section, so that the lubricating liquid is stored in the second tank section, thereby ensuring that there is sufficient lubricating liquid between the first mating plane and the second mating plane.

[0060] In other embodiments not shown in the drawings, the oil storage tank only includes the third tank section, and the extension direction of the third tank section is arranged at a third angle with the extension direction of the rotating shaft. In this way, during the reciprocating motion of the piston relative to the rotating shaft, the lubricating liquid in the second oil tank can enter the third tank section, so that the lubricating liquid is stored in the third tank section, thereby ensuring that there is sufficient lubricating liquid between the first mating plane and the second mating plane.

[0061] In other embodiments not shown in the drawings, the matching segment is a prism structure, and two surfaces of the prism structure arranged parallel to each other are two first matching planes.

[0062] like Figures 1 to 3 , Fig.10 and Fig.11 As shown, the pump body assembly also includes an upper flange 50, the rotating shaft 40 also includes a long shaft section 42, the long shaft section 42 is connected to the matching section 41, and is inserted into the upper flange 50, the cylinder 20 has a first extension portion 21 extending toward the upper flange 50, and the pump body assembly also includes an upper limit plate 70. Among them, the upper limit plate 70 is arranged between the upper flange 50 and the cylinder sleeve 10, the first extension portion 21 extends into the upper limit plate 70, and the upper limit plate 70 and the first extension portion 21 are limited and stopped to prevent the cylinder 20 from being displaced in the radial direction relative to the upper limit plate 70. In this way, the upper limit plate 70 can support the cylinder 20, prevent the cylinder 20 from being displaced in the radial direction, ensure that the cylinder 20 always rotates around its central axis, and ensure that the pump body assembly can achieve normal suction, compression and exhaust actions.

[0063] Specifically, the upper flange 50 is fixedly connected to the cylinder sleeve 10, and the upper limit plate 70 is connected to the upper flange 50 by fasteners. The upper limit plate 70 has a first through hole for the first extension portion 21 to extend into, and the first extension portion 21 extends into the first through hole and stops with the inner wall of the first through hole, thereby realizing the upper limit plate 70 limiting the cylinder 20.

[0064] In this embodiment, the first extension portion 21 is a circular ring structure, and the circular ring structure is coaxially arranged with the cylinder 20. It should be noted that the structure of the first extension portion 21 is not limited thereto. Optionally, the first extension portion 21 is a plurality of circular arcs, and each circular arc is coaxially arranged with the cylinder 20.

[0065] like Figures 1 to 3 and Fig.10As shown, the rotating shaft 40 also includes a short shaft section 43, and the short shaft section 43 is connected to the long shaft section 42 through the matching section 41. The pump body assembly also includes a lower flange 60, and the short shaft section 43 is inserted into the lower flange 60. The cylinder 20 has a second extension portion 22 extending toward the lower flange 60, and the pump body assembly also includes a lower limit plate 80. Among them, the lower limit plate 80 is arranged between the lower flange 60 and the cylinder sleeve 10, and the second extension portion 22 extends into the lower limit plate 80. The lower limit plate 80 and the second extension portion 22 limit the stop to prevent the cylinder 20 from being displaced in the radial direction relative to the lower limit plate 80. In this way, the lower limit plate 80 can support the cylinder 20, prevent the cylinder 20 from being displaced in the radial direction, ensure that the cylinder 20 always rotates around its central axis, and ensure that the pump body assembly can achieve normal suction, compression and exhaust actions.

[0066] Specifically, the lower flange 60 is fixedly connected to the cylinder sleeve 10, and the lower limit plate 80 is connected to the lower flange 60 by fasteners. The lower limit plate 80 has a second through hole for the second extension portion 22 to extend into, and the second extension portion 22 extends into the second through hole and stops with the inner wall of the second through hole, thereby realizing the lower limit plate 80 limiting the cylinder 20.

[0067] Specifically, the working principle of the pump assembly is as follows:

[0068] A variable volume chamber is formed between the cylinder 20 and the piston 30. The cylinder 20 and the rotating shaft 40 rotate around their respective central axes, and the piston 30 reciprocates simultaneously relative to the cylinder 20 and the rotating shaft 40. The reciprocating motion of the piston 30 relative to the cylinder 20 realizes the periodic enlargement and reduction of the variable volume chamber. The cylinder 20 rotates relative to the cylinder sleeve 10, realizing the communication between the variable volume chamber and the suction channel or the exhaust channel respectively. The above two composite motions realize the suction, compression and exhaust process of the pump body assembly.

[0069] The present application also provides a fluid machine (not shown), comprising a housing and a pump assembly located in the housing, wherein the pump assembly is the above-mentioned pump assembly. Optionally, the fluid machine is a compressor.

[0070] The present application also provides a heat exchange device (not shown), comprising the above-mentioned fluid machinery. Optionally, the heat exchange device is an air conditioner.

[0071] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0072] The rotating shaft rotates around its central axis, the matching section of the rotating shaft drives the piston to move, and the piston drives the cylinder to rotate around the central axis of the cylinder, so that the piston reciprocates relative to the cylinder and the rotating shaft at the same time, thereby realizing the suction, compression and exhaust actions of the pump body assembly. In this way, during the operation of the pump body assembly, the first matching plane contacts the piston so that the rotating shaft drives the piston to move. The lubricating liquid enters the rotating shaft through the axial oil hole, and the lubricating liquid entering the axial oil hole flows into the first oil groove to lubricate the first matching plane and the piston, avoiding the occurrence of jamming between the piston and the rotating shaft, thereby solving the problem of jamming between the piston and the rotating shaft of the rotary cylinder compressor in the prior art, which affects the normal operation of the rotary cylinder compressor. At the same time, the extension direction of the first oil groove is perpendicular to the extension direction of the rotating shaft, so that the lubricating liquid can flow in the piston, thereby reducing the friction between the piston and the rotating shaft, and achieving a good friction reduction effect.

[0073] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0074] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0075] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0076] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A pump assembly, comprising a cylinder sleeve (10), a cylinder (20) and a piston (30), wherein the cylinder (20) is rotatably disposed in the cylinder sleeve (10), and the piston (30) is slidably disposed in the cylinder (20), characterized in that: The pump assembly also includes: A rotating shaft (40) comprises a matching section (41), wherein the matching section (41) is inserted into the piston (30) to drive the piston (30) to move, and an outer surface of the matching section (41) has two first matching planes (411) arranged in parallel, wherein the first matching planes (411) are in contact with the piston (30), so that the rotating shaft (40) drives the piston (30) to move; The rotating shaft (40) has an axial oil hole (44), and each of the first matching planes (411) has a first oil groove (4111), the first oil groove (4111) is connected to the axial oil hole (44), and the extension direction of the first oil groove (4111) is perpendicular to the extension direction of the rotating shaft (40); The mating section (41) is a columnar structure, and the outer peripheral surface of the columnar structure includes two first mating planes (411), a first arcuate surface (412) and a second arcuate surface (413); the first arcuate surface (412) and the second arcuate surface (413) are arranged opposite to each other and between the two first mating planes (411); wherein the first end of the first oil groove (4111) extends to the first arcuate surface (412), and / or the second end of the first oil groove (4111) extends to the second arcuate surface (413).

2. The pump assembly according to claim 1, characterized in that: Each of the first mating planes (411) also has a second oil groove (4112), the second oil groove (4112) is connected to both the axial oil hole (44) and the first oil groove (4111), and the first oil groove (4111) is connected to the axial oil hole (44) through the second oil groove (4112); the extension direction of the second oil groove (4112) is arranged at a first angle to the extension direction of the first oil groove (4111).

3. The pump assembly according to claim 2, characterized in that: The mating section (41) has a radial oil hole (414), and the radial oil hole (414) is connected to the axial oil hole (44); the bottom of the second oil groove (4112) has an oil hole (4112a), and the oil hole (4112a) is connected to the axial oil hole (44) through the radial oil hole (414), so that the lubricating fluid discharged from the oil hole (4112a) flows into the second oil groove (4112).

4. The pump assembly according to claim 3, characterized in that: The radial oil through hole (414) is coaxially arranged with the oil through hole (4112a), or the central axis direction of the radial oil through hole (414) and the central axis direction of the oil through hole (4112a) are arranged parallel to each other.

5. The pump assembly according to claim 4, characterized in that: The orthographic projection of the radial oil hole (414) on the first matching plane (411) is the first projection, the orthographic projection of the oil hole (4112a) on the first matching plane (411) is the second projection, and the first projection is within the second projection.

6. The pump assembly according to claim 3, characterized in that: The extension direction of the radial oil through hole (414) and the extension direction of the oil through hole (4112a) are arranged at a second angle.

7. The pump assembly according to claim 1, characterized in that: There are a plurality of the first oil grooves (4111), and the plurality of the first oil grooves (4111) are arranged at intervals along the central axis direction of the rotating shaft (40).

8. The pump assembly according to claim 2, characterized in that: The piston (30) has a second mating plane (31) mating with the first mating plane (411), and at least one of the second mating planes (31) has an oil storage groove, and the oil storage groove is connected to the first oil groove (4111) and / or the second oil groove (4112).

9. The pump assembly according to claim 8, characterized in that: The oil storage tank comprises: a first slot section (311), wherein the extending direction of the first slot section (311) is consistent with the extending direction of the rotating shaft (40); and / or a second slot section (312), wherein the extension direction of the second slot section (312) and the extension direction of the rotating shaft (40) are arranged perpendicular to each other; and / or A third groove section (313), wherein an extension direction of the third groove section (313) and an extension direction of the rotating shaft (40) form a third angle, and the third angle is less than 90°.

10. The pump assembly according to claim 1, characterized in that: The matching section (41) is a prism structure, and two surfaces of the prism structure that are arranged parallel to each other are the two first matching planes (411).

11. The pump assembly according to claim 1, characterized in that: The pump body assembly further comprises an upper flange (50), the rotating shaft (40) further comprises a long shaft section (42), the long shaft section (42) is connected to the matching section (41) and is inserted into the upper flange (50), the cylinder (20) has a first extension portion (21) extending toward the upper flange (50), and the pump body assembly further comprises: An upper limit plate (70) is arranged between the upper flange (50) and the cylinder sleeve (10), the first extension portion (21) extends into the upper limit plate (70), and the upper limit plate (70) and the first extension portion (21) are limited stops to prevent the cylinder (20) from being displaced in a radial direction relative to the upper limit plate (70).

12. The pump assembly according to claim 11, characterized in that The rotating shaft (40) further comprises a short shaft section (43), wherein the short shaft section (43) is connected to the long shaft section (42) via the matching section (41); the pump body assembly further comprises a lower flange (60), wherein the short shaft section (43) is inserted into the lower flange (60); the cylinder (20) comprises a second extension portion (22) extending toward the lower flange (60); and the pump body assembly further comprises: A lower limit plate (80) is arranged between the lower flange (60) and the cylinder sleeve (10), the second extension portion (22) extends into the lower limit plate (80), and the lower limit plate (80) and the second extension portion (22) are limited and stopped to prevent the cylinder (20) from being displaced in a radial direction relative to the lower limit plate (80).

13. A fluid machine, characterized in that: The invention comprises a shell and a pump body assembly located in the shell, wherein the pump body assembly is the pump body assembly according to any one of claims 1 to 12.

14. A heat exchange device, characterized in that: Including the fluid machinery described in claim 13.

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