CN108869279B

CN108869279B - Pump body assembly, fluid machinery and heat exchange equipment

Info

Publication number: CN108869279B
Application number: CN201810791305.7A
Authority: CN
Inventors: 杨森; 尚文海; 马利亚; 杜忠诚; 李直; 张金圈; 许甲岿; 郭霜
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2018-07-18
Filing date: 2018-07-18
Publication date: 2024-04-16
Anticipated expiration: 2038-07-18
Also published as: CN108869279A

Abstract

The invention provides a pump body assembly, a fluid machine and heat exchange equipment. Wherein, pump body subassembly includes: an upper flange; an upper limit plate; the upper limiting plate is positioned between the upper flange and the air cylinder; the piston assembly is arranged in the cylinder and comprises a piston sleeve and a piston arranged in the piston sleeve in a sliding manner, and the upper end face of the piston sleeve is in limit fit with the lower end face of the upper limit plate so as to prevent the piston sleeve from displacing relative to the upper flange in the radial direction. The invention effectively solves the problems that the piston sleeve of the pump body assembly is easy to eccentrically rotate and the working efficiency of the pump body assembly is influenced in the prior art.

Description

A pump body assembly fluid machine and heat exchange device

Technical Field

The invention relates to the technical field of pump body components, in particular to a pump body component, a fluid machine and heat exchange equipment.

Background

At present, in the operation process of the pump body assembly, the piston sleeve is easy to eccentric and obliquely rotate, so that the piston sleeve is easy to rub with the cylinder and the piston, and the working efficiency and the working performance of the pump body assembly are seriously affected.

Disclosure of Invention

The invention mainly aims to provide a pump body assembly, a fluid machine and heat exchange equipment, so as to solve the problem that a piston sleeve of the pump body assembly is easy to eccentrically rotate and the working efficiency of the pump body assembly is influenced in the prior art.

In order to achieve the above object, according to one aspect of the present invention, there is provided a pump body assembly comprising: an upper flange; an upper limit plate; the upper limiting plate is positioned between the upper flange and the air cylinder; the piston assembly is arranged in the cylinder and comprises a piston sleeve and a piston arranged in the piston sleeve in a sliding manner, and the upper end face of the piston sleeve is in limit fit with the lower end face of the upper limit plate so as to prevent the piston sleeve from displacing relative to the upper flange in the radial direction.

Further, the upper end face of the piston sleeve is provided with a first extension part, and the first extension part stretches into the central hole of the upper limiting plate and is in limiting fit with the inner surface of the central hole of the upper limiting plate.

Further, the surface of the upper limiting plate facing the piston sleeve is provided with a fourth limiting groove, the upper end surface of the piston sleeve is provided with a first extending part, and the first extending part stretches into the fourth limiting groove and is limited and stopped by the fourth limiting groove.

Further, the surface of the upper limiting plate facing the piston sleeve is provided with a third extension part, and the third extension part stretches into the piston sleeve and is in limiting stop with the inner surface of the piston sleeve.

Further, the surface of the upper limiting plate facing the piston sleeve is provided with a third extending part, the upper end surface of the piston sleeve is provided with a first limiting groove, and the third extending part extends into the first limiting groove and is limited and stopped by the first limiting groove.

Further, the pump body assembly further comprises a lower flange positioned below the piston assembly and a lower antifriction ring arranged in the cylinder, the surface, facing the lower flange, of the piston sleeve is provided with a limiting protrusion, the lower antifriction ring is provided with a central hole, and the limiting protrusion extends into the central hole of the lower antifriction ring and is in limiting stop with the lower flange, so that the piston sleeve is prevented from displacing relative to the lower flange in the radial direction.

Further, the surface of the lower flange facing the piston sleeve is provided with a second limiting groove, and the limiting protrusion stretches into the second limiting groove so as to prevent the piston sleeve from displacing in the radial direction relative to the lower flange.

Further, the surface of the lower flange facing the piston sleeve is provided with a second extension part, and the second extension part and the limiting protrusion limit the stop, so that the piston sleeve is prevented from displacing relative to the lower flange in the radial direction.

Further, the second extension portion is located outside the limit projection.

Further, the second extension portion is located inside the limit projection.

Further, the limiting bulge is a convex ring extending towards the lower flange, and the convex ring and the piston sleeve are coaxially arranged.

Further, the limit protrusions are a plurality of bosses extending towards the lower flange, and the bosses are arranged at intervals along the circumferential direction of the piston sleeve.

Further, the pump body assembly further comprises a structural member positioned below the air cylinder, and the lower end face of the piston sleeve is provided with a limiting protrusion which is in limiting fit with the structural member so as to prevent the piston sleeve from displacing in the radial direction relative to the structural member.

Further, the structural member below the cylinder is a lower flange.

Further, the surface of the lower flange facing the piston sleeve is provided with a second limit groove, and the limit protrusion extends into the second limit groove so as to prevent the piston sleeve from displacing in the radial direction relative to the lower flange.

Further, the structural member comprises a lower flange and a lower limiting plate, wherein the lower limiting plate is positioned between the air cylinder and the lower flange, and the limiting protrusion and the lower limiting plate are limited and stopped, so that the piston sleeve is prevented from displacing in the radial direction relative to the lower limiting plate.

Further, the limiting protrusion extends into the central hole of the lower limiting plate and is in limiting fit with the inner surface of the central hole of the lower limiting plate.

Further, the surface of the lower limiting plate facing the piston sleeve is provided with a third limiting groove, and the limiting protrusion extends into the third limiting groove and is limited by the third limiting groove.

Further, the pump body assembly further includes: the lower flange is positioned below the piston assembly; the rotating shaft penetrates through the upper flange, the piston sleeve and the lower flange in sequence, and the rotating shaft is coaxially arranged with the upper flange and the lower flange.

According to another aspect of the present invention, there is provided a fluid machine comprising the pump body assembly described above.

According to another aspect of the present invention there is provided a heat exchange device comprising a fluid machine as described above.

By applying the technical scheme of the invention, the pump body assembly comprises an upper flange, an upper limiting plate, a cylinder and a piston assembly. Wherein, go up the limiting plate and be located between flange and the cylinder. The piston assembly is arranged in the cylinder and comprises a piston sleeve and a piston arranged in the piston sleeve in a sliding manner, and the upper end face of the piston sleeve is in limit fit with the lower end face of the upper limit plate so as to prevent the piston sleeve from displacing relative to the upper flange in the radial direction. Like this, at the pump body subassembly operation in-process, the upper end of piston sleeve is spacing, support by last limiting plate, and then prevents that the piston sleeve from taking place radial direction's removal in the operation in-process, guarantees that the piston sleeve can normally rotate, has solved the easy eccentric rotation of taking place of piston sleeve of pump body subassembly among the prior art, has influenced the problem of pump body subassembly work efficiency, has promoted pump body subassembly's operational reliability and working property.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:

FIG. 1 shows a schematic exploded view of a first embodiment of a pump body assembly according to the present invention;

FIG. 2 shows a cross-sectional view of the pump body assembly of FIG. 1;

FIG. 3 shows a front view of a piston sleeve of the pump body assembly of FIG. 1;

FIG. 4 shows a cross-sectional view of the piston sleeve of FIG. 3;

FIG. 5 shows a schematic exploded view of a second embodiment of a pump body assembly according to the present invention;

FIG. 6 shows a cross-sectional view of the pump body assembly of FIG. 5;

FIG. 7 shows a schematic perspective view of an upper stop plate of the pump body assembly of FIG. 5;

FIG. 8 shows a cross-sectional view of the upper stop plate of FIG. 7;

FIG. 9 shows the pump body of FIG. 5 a cross-sectional view of a piston sleeve of the assembly;

FIG. 10 shows a schematic exploded view of a third embodiment of a pump body assembly according to the present invention;

FIG. 11 shows a cross-sectional view of the pump body assembly of FIG. 10;

FIG. 12 is a schematic perspective view of an upper stop plate of the pump body assembly of FIG. 10;

FIG. 13 shows a cross-sectional view of the upper stop plate of FIG. 12;

FIG. 14 shows a schematic exploded view of a fourth embodiment of a pump body assembly according to the present invention;

FIG. 15 shows the view of FIG. 14 a cross-sectional view of the pump body assembly;

FIG. 16 shows a schematic perspective view of an upper stop plate of the pump body assembly of FIG. 14;

FIG. 17 shows a cross-sectional view of the upper stop plate of FIG. 16;

FIG. 18 shows a cross-sectional view of a piston sleeve of the pump body assembly of FIG. 14;

FIG. 19 shows an exploded view of a fifth embodiment of a pump body assembly according to the present invention;

FIG. 20 shows a cross-sectional view of the pump body assembly of FIG. 19;

FIG. 21 shows a cross-sectional view of a piston sleeve of the pump body assembly of FIG. 19;

FIG. 22 shows a top view of the lower flange of the pump body assembly of FIG. 19;

FIG. 23 shows a cross-sectional view of the lower flange of FIG. 22;

FIG. 24 shows an exploded view of a sixth embodiment of a pump body assembly according to the present invention;

FIG. 25 shows a cross-sectional view of the pump body assembly of FIG. 24;

FIG. 26 shows an exploded view of a seventh embodiment of a pump body assembly according to the present invention;

FIG. 27 shows a cross-sectional view of the pump body assembly of FIG. 26;

FIG. 28 shows an exploded view of an eighth embodiment of a pump body assembly according to the present invention;

FIG. 29 shows a cross-sectional view of the pump body assembly of FIG. 28;

FIG. 30 shows a cross-sectional view of a piston sleeve of the pump body assembly of FIG. 28;

FIG. 31 shows a schematic exploded view of a ninth embodiment of a pump body assembly according to the present invention;

FIG. 32 shows a cross-sectional view of the pump body assembly of FIG. 31;

FIG. 33 shows a cross-sectional view of a piston sleeve of the pump body assembly of FIG. 31;

FIG. 34 shows a schematic perspective view of a lower stop plate of the pump body assembly of FIG. 31; and

fig. 35 shows a cross-sectional view of the lower limiting plate of fig. 34.

Wherein the above figures include the following reference numerals:

11. an upper flange; 12. a lower flange; 121. the second limit groove; 13. a lower limit plate; 131. the third limit groove; 122. a second extension; 14. an upper limit plate; 141. a fourth limit groove; 142. a third extension; 20. a cylinder; 30. a rotating shaft; 40. a piston sleeve; 41. a first extension; 42. the first limit groove; 43. a limit protrusion; 50. a piston; 60. and a lower wear ring.

Detailed Description

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.

It is noted that all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs unless otherwise indicated.

In the present invention, unless otherwise indicated, terms of orientation such as "upper" and "lower" are used generally with respect to the orientation shown in the drawings or to the vertical, vertical or gravitational orientation; also, for ease of understanding and description, "left, right" is generally directed to the left, right as shown in the drawings; "inner and outer" refer to inner and outer relative to the outline of the components themselves, but the above-described orientation terms are not intended to limit the present invention.

In order to solve the problem that the piston sleeve of the pump body assembly is easy to eccentrically rotate and affects the working efficiency of the pump body assembly in the prior art, the application provides the pump body assembly, the fluid machinery and the heat exchange equipment.

Example 1

As shown in fig. 1 and 2, the pump body assembly includes an upper flange 11, an upper limiting plate 14, a cylinder 20, and a piston assembly. Wherein the upper limiting plate 14 is located between the upper flange 11 and the cylinder 20. The piston assembly is arranged in the cylinder 20, and comprises a piston sleeve 40 and a piston 50 slidably arranged in the piston sleeve 40, wherein the upper end surface of the piston sleeve 40 is in limit fit with the lower end surface of the upper limit plate 14 so as to prevent the piston sleeve 40 from displacing relative to the upper flange 11 in the radial direction.

By applying the technical scheme of the embodiment, in the operation process of the pump body assembly, the upper end of the piston sleeve 40 is limited and supported by the upper limiting plate 14, so that the piston sleeve 40 is prevented from moving in the radial direction in the operation process, the piston sleeve 40 is ensured to normally rotate, the problems that the piston sleeve of the pump body assembly is easy to eccentrically rotate and the working efficiency of the pump body assembly is influenced in the prior art are solved, and the operation reliability and the working performance of the pump body assembly are improved.

As shown in fig. 1 to 4, the upper end surface of the piston sleeve 40 has a first extension portion 41, and the first extension portion 41 extends into the central hole of the upper limiting plate 14 and is in limiting fit with the inner surface of the central hole of the upper limiting plate 14. Specifically, during operation of the pump body assembly, the upper flange 11 is fixedly connected with the upper limiting plate 14, and the first extension portion 41 extends into the central hole of the upper limiting plate 14 and can be in limiting fit with the inner surface of the central hole, so as to limit the upper end of the piston sleeve 40 in the radial direction, prevent the upper end of the piston sleeve 40 from displacing in the radial direction relative to the upper flange 11 or the upper limiting plate 14, and avoid structural interference between the piston sleeve 40 and the piston 50 or the cylinder 20 to affect normal operation of the pump body assembly. The structure is simple and easy to process and realize.

In the present embodiment, the first extension portion 41 is annular, and the first extension portion 41 is disposed coaxially with the piston sleeve 40. In this way, the above arrangement ensures that the piston sleeve 40 can rotate with respect to the upper flange 11, thus ensuring the operational reliability of the pump body assembly. The piston sleeve 40 is eccentrically arranged with the upper flange 11, and the eccentric amount is the eccentric amount e of the pump body assembly. In this way, the first extension portion 41 of the piston sleeve 40 can rotate around the central axis of the piston sleeve 40 in the central hole of the upper limiting plate 14, so that the limiting and supporting reliability of the upper limiting plate 14 to the piston sleeve 40 is ensured.

The structure of the first extension 41 is not limited to this. Alternatively, the first extension 41 is a double-layered annular structure, and the annular structure of the outermost layer performs a limit stop with the inner surface of the central hole of the upper limit plate 14. Thus, the above arrangement makes the structure of the first extension portion 41 more diversified, and further makes the processing and manufacturing of the piston sleeve 40 easier and simpler, and reduces the labor intensity of the staff.

Alternatively, the first extension 41 is a collar, which is arranged coaxially with the piston sleeve 40.

The structure of the first extension 41 is not limited to this. Optionally, the first extension 41 is at least one protrusion, and when the protrusions are plural, the plural protrusions are disposed coaxially with the piston sleeve 40 around the formed circle.

As shown in fig. 1 and 2, the pump body assembly further includes a lower flange 12 and a shaft 30. Wherein the lower flange 12 is located below the piston assembly. The rotation shaft 30 sequentially passes through the upper flange 11, the piston housing 40 and the lower flange 12, and the rotation shaft 30 is coaxially disposed with the upper flange 11 and the lower flange 12. During operation of the pump body assembly, the rotary shaft 30 rotates around the central axis of the upper flange 11, the piston sleeve 40 eccentrically rotates relative to the upper flange 11, the piston 50 only reciprocates relative to the piston sleeve 40, the piston 50 reciprocates relative to the rotary shaft 30, and the two reciprocations are mutually perpendicular, namely, the operation of the pump body assembly follows the principle of a cross slide block mechanism. With the reciprocating motion between the piston 50 and the piston sleeve 40, the head cambered surface of the piston 50, the inner surface of the cylinder 20, and the two cavity volumes formed between the guide holes of the piston sleeve 40 gradually change, thus completing the air suction, compression and exhaust processes.

As shown in fig. 2, the surface of the lower flange 12 facing the sleeve 40 is a plane having a predetermined distance from the lower end surface of the sleeve 40.

The present application also provides a fluid machine (not shown) comprising the pump body assembly described above. Alternatively, the fluid machine is a compressor.

The present application also provides a heat exchange device (not shown) comprising a fluid machine as described above. Optionally, the heat exchange device is an air conditioner.

Example two

The pump body assembly in the second embodiment is different from the first embodiment in that: the upper limiting plate 14 has a different structure.

As shown in fig. 5 to 9, the surface of the upper limiting plate 14 facing the piston sleeve 40 is provided with a fourth limiting groove 141, the upper end surface of the piston sleeve 40 is provided with a first extension part 41, and the first extension part 41 extends into the fourth limiting groove 141 and is limited and stopped by the fourth limiting groove 141. Specifically, during the operation of the pump body assembly, the first extension portion 41 extends into the fourth limiting groove 141 of the piston sleeve 40 and is in limiting stop with the fourth limiting groove 141, so that the upper limiting plate 14 is used for limiting and supporting the upper end of the piston sleeve 40, and the piston sleeve 40 and the piston 50 or the cylinder 20 are prevented from structural interference to influence the normal operation of the pump body assembly. The structure is simple and easy to process and realize.

Optionally, the fourth limiting groove 141 is an annular groove. Specifically, the annular groove is disposed coaxially with the central hole of the upper limit plate 14. The structure is simple and easy to realize.

Example III

The pump body assembly in the third embodiment is different from the first embodiment in that: the upper limiting plate 14 has different structures

As shown in fig. 10 to 13, the surface of the upper limiting plate 14 facing the piston sleeve 40 has a third extension 142, and the third extension 142 extends into the piston sleeve 40 and is in limiting stop with the inner surface of the piston sleeve 40. In this way, the third extension portion 142 of the upper limiting plate 14 extends into the piston sleeve 40 and performs a limiting stop on the upper end of the piston sleeve 40, so as to limit the upper limiting plate 14 to the radial direction of the piston sleeve 40.

In other embodiments not shown in the drawings, the inner surface of the piston sleeve is provided with a step surface, the step surface is positioned at the end of the piston sleeve facing the upper flange, and the third extension part extends into the step surface of the piston sleeve to limit the stop of the step surface so as to limit the upper limit plate to the radial direction of the piston sleeve.

Optionally, the third extension 142 is an annular structure, and the annular structure is disposed coaxially with the central hole of the upper limiting plate 14. The structure is simple and easy to realize.

The structure of the third extension portion 142 is not limited to this. Optionally, the third extension 142 is formed around a plurality of arc segments, and the plurality of arc segments are disposed coaxially with the central hole of the upper limiting plate 14 around the formed circle.

Example IV

The pump body assembly in the fourth embodiment is different from the first embodiment in that: the upper limiting plate 14 and the piston housing 40 are different in structure.

As shown in fig. 14 to 18, the surface of the upper limiting plate 14 facing the piston sleeve 40 has a third extending portion 142, the upper end surface of the piston sleeve 40 has a first limiting groove 42, and the third extending portion 142 extends into the first limiting groove 42 and is limited and stopped by the first limiting groove 42. Specifically, during the operation of the pump body assembly, the third extension portion 142 extends into the first limiting groove 42 to limit and support the first limiting groove 42, so as to limit and support the upper end of the piston sleeve 40 by the upper limiting plate 14, and avoid the structural interference between the piston sleeve 40 and the piston 50 or the cylinder 20 to affect the normal operation of the pump body assembly. The structure is simple and easy to process and realize.

Alternatively, the first limiting groove 42 is an annular groove, and the annular groove is disposed coaxially with the piston sleeve 40.

Example five

The pump body assembly in the fifth embodiment differs from the first embodiment in that: the lower flange 12 and the piston sleeve 40 are structurally different.

As shown in fig. 19 to 22, the lower end surface of the piston sleeve 40 has a stopper protrusion 43, and the stopper protrusion 43 is stopper-engaged with the structural member located below the cylinder 20 to prevent the piston sleeve 40 from being displaced in the radial direction with respect to the structural member. Wherein the structural member located below the cylinder 20 is the lower flange 12. In this way, the lower flange 12 is in limit fit with the limit projection 43 of the piston sleeve 40 to limit the piston sleeve 40 in the radial direction. Meanwhile, the upper end of the piston sleeve 40 is supported in a limiting manner by the upper limiting plate 14, so that the upper end and the lower end of the piston sleeve 40 are supported in a limiting manner, the influence on the normal operation of the pump body assembly caused by structural interference between the piston sleeve 40 and the piston 50 or the cylinder 20 is avoided, and the operation reliability and the working performance of the pump body assembly are improved.

As shown in fig. 22 and 23, the surface of the lower flange 12 facing the piston sleeve 40 has a second limiting groove 121, and the limiting protrusion 43 extends into the second limiting groove 121 to prevent the piston sleeve 40 from being displaced in a radial direction with respect to the lower flange 12. Specifically, the second limiting groove 121 is eccentrically arranged on the lower flange 12, and the limiting protrusion 43 extends into the second limiting groove 121, so that the lower flange 12 can realize the limiting stop of the piston sleeve 40.

Alternatively, the second limiting groove 121 is an annular groove, which is eccentrically disposed on the lower flange 12, and the eccentric amount is e.

Example six

The pump body assembly in the sixth embodiment is different from the fifth embodiment in that: the pump body components are structurally different.

As shown in fig. 24 and 25, the pump body assembly further includes a lower wear ring 60 disposed in the cylinder 20, the surface of the piston sleeve 40 facing the lower flange 12 has a limiting protrusion 43, the lower wear ring 60 has a central hole, and the limiting protrusion 43 extends into the central hole and is in limiting stop with the lower flange 12 to prevent the piston sleeve 40 from being displaced in a radial direction relative to the lower flange 12. Thus, the limiting protrusion 43 extends into the central hole of the lower wear ring 60 and is in limiting fit with the lower flange 12, so that the lower flange 12 can limit the piston sleeve 40 in the radial direction, so as to limit the lower end of the piston sleeve 40. Meanwhile, the upper end of the piston sleeve 40 is supported by the upper flange 11 in a limiting manner, so that the upper end and the lower end of the piston sleeve 40 are supported in a limiting manner, the influence on the normal operation of the pump body assembly caused by structural interference between the piston sleeve 40 and the piston 50 or the cylinder 20 is avoided, and the operation reliability and the working performance of the pump body assembly are improved.

Specifically, the outer surface of the lower wear ring 60 is matched with the inner circular surface of the cylinder 20, the inner surface of the lower wear ring 60 is matched with the limit protrusion 43 of the piston sleeve 40, the lower wear ring 60 rotates relative to the cylinder 20 and the limit protrusion 43, and the rotation speed of the lower wear ring 60 relative to the cylinder 20 and the rotation speed of the lower wear ring 60 relative to the limit protrusion 43 are smaller than the rotation speed of the rotating shaft 30, and the power consumption of the pump body assembly is reduced due to the fact that the power consumption of the friction pair is proportional to the square of the rotation speed.

As shown in fig. 24 and 25, the surface of the lower flange 12 facing the piston sleeve 40 has a second limiting groove 121, the stopper protrusion 43 protrudes into the second stopper groove 121 to prevent the piston sleeve 40 from being displaced in a radial direction with respect to the lower flange 12. Specifically, the second limiting groove 121 is eccentrically disposed on the lower flange 12, and the limiting protrusion 43 penetrates through the central hole of the lower wear ring 60 and extends into the second limiting groove 121, so as to realize the limiting stop of the lower flange 12 on the piston sleeve 40.

In the present embodiment, the limiting protrusion 43 is a protruding ring extending toward the lower flange 12, and the protruding ring is disposed coaxially with the piston sleeve 40. In particular, the collar provides for a more uniform and stable force bearing of the piston sleeve 40 during the limit stop of the collar and the lower flange 12, thereby making the operation of the piston sleeve 40 smoother and improving the operational reliability of the pump body assembly.

Note that the structure of the stopper projection 43 is not limited to this. Alternatively, the limiting projection 43 is a plurality of bosses extending toward the lower flange 12, and the plurality of bosses are disposed at intervals along the circumferential direction of the piston sleeve 40. The above arrangement not only reduces the mass of the piston sleeve 40, but also makes the structure of the piston sleeve 40 simpler and reduces the processing cost of the piston sleeve 40.

Example seven

The pump body assembly in the seventh embodiment differs from that in the sixth embodiment in that: the lower flange 12 is of different construction.

As shown in fig. 26 and 27, the surface of the lower flange 12 facing the piston sleeve 40 has a second extension 122, and the second extension 122 is stopped by the stop protrusion 43 to prevent the piston sleeve 40 from being displaced in the radial direction relative to the lower flange 12. Specifically, the side surface of the second extension portion 122 and the side surface of the limiting protrusion 43 can be in limit fit, so that radial displacement between the side surface of the second extension portion 122 and the side surface of the limiting protrusion is prevented, further displacement of the piston sleeve 40 in the radial direction relative to the lower flange 12 is prevented, stable operation of the piston sleeve 40 is ensured, and operation reliability and working efficiency of the pump body assembly are improved.

As shown in fig. 26 and 27, the second extension 122 is located outside the limit projection 43. Specifically, the inner side of the second extension 122 performs a limit stop against the surface of the limit projection 43 on the side away from the center of the piston sleeve 40, preventing radial displacement therebetween.

Optionally, a predetermined distance is provided between the inner side surface of the second extension 122 and the surface of the limit protrusion 43 on the side away from the center of the piston sleeve 40, and the predetermined distance is 5um or more and 40um or less. Like this, the above-mentioned numerical range both guarantees that second extension 122 can radially spacing protruding 43, still makes spacing protruding 43 can rotate for second extension 122, and then promotes the operational reliability of pump body subassembly.

Alternatively, the second extension 122 is an eccentric boss, and the eccentric boss is eccentric to the lower flange 12 by an amount e.

Example eight

The pump body assembly in the eighth embodiment differs from that in the fifth embodiment in that: pump body assembly the structures are different.

As shown in fig. 28 to 30, the pump body assembly further includes a structural member located below the cylinder 20, and the lower end surface of the piston sleeve 40 has a limiting protrusion 43, and the limiting protrusion 43 is in limiting fit with the structural member to prevent the piston sleeve 40 from being displaced in a radial direction relative to the structural member. The structural member includes a lower flange 12 and a lower limiting plate 13, the lower limiting plate 13 is located between the cylinder 20 and the lower flange 12, and the limiting protrusion 43 and the lower limiting plate 13 limit the stop, so as to prevent the piston sleeve 40 from displacing in the radial direction relative to the lower limiting plate 13. Specifically, the lower limit plate 13 is in limit fit with the limit projection 43 of the piston sleeve 40 to limit the piston sleeve 40 in the radial direction. Meanwhile, the upper end of the piston sleeve 40 is supported by the upper flange 11 in a limiting manner, so that the upper end and the lower end of the piston sleeve 40 are supported in a limiting manner, the influence on the normal operation of the pump body assembly caused by structural interference between the piston sleeve 40 and the piston 50 or the cylinder 20 is avoided, and the operation reliability and the working performance of the pump body assembly are improved.

As shown in fig. 29, the limiting projection 43 extends into the center hole of the lower limiting plate 13 and is in limiting engagement with the inner surface of the center hole of the lower limiting plate 13. Specifically, the lower limiting plate 13 is fixedly connected with the lower flange 12, the outer surface of the limiting protrusion 43 and the inner surface of the central hole of the lower limiting plate 13 are in limiting stop, so that the limiting stop of the lower limiting plate 13 to the limiting protrusion 43 (the piston sleeve 40) is realized, the piston sleeve 40 is prevented from displacing in the radial direction relative to the lower limiting plate 13 or the lower flange 12, and the operation reliability of the pump body assembly is further improved.

Example nine

The pump body assembly in the ninth embodiment differs from the eighth embodiment in that: the lower limiting plate 13 has a different structure.

As shown in fig. 31 to 35, the surface of the lower limiting plate 13 facing the piston sleeve 40 is provided with a third limiting groove 131, and the limiting protrusion 43 extends into the third limiting groove 131 and is in limiting stop with the third limiting groove 131. Specifically, the limiting protrusion 43 is in limiting fit with the groove wall of the third limiting groove 131, so that the lower limiting plate 13 limits the radial direction of the piston sleeve 40, the piston sleeve 40 operates more stably, and the operation reliability of the pump body assembly is improved.

Optionally, the third limiting groove 131 is an annular groove, and the annular groove is coaxially disposed with the central hole of the lower limiting plate 13. The structure is simple and easy to realize and process.

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

in the operation process of the pump body component, the upper end of the piston sleeve is limited and supported by the upper limiting plate, so that the piston sleeve is prevented from moving in the radial direction in the operation process, the piston sleeve is ensured to normally rotate, the problems that the piston sleeve of the pump body component is easy to eccentrically rotate and the working efficiency of the pump body component is influenced in the prior art are solved, and the operation reliability and the working performance of the pump body component are improved.

It will be apparent that the embodiments described above are merely some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be implemented in sequences other than those illustrated or described herein.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A pump body assembly, comprising:

an upper flange (11);

an upper limit plate (14);

a cylinder (20), the upper limiting plate (14) is positioned between the upper flange (11) and the cylinder (20);

the piston assembly is arranged in the air cylinder (20) and comprises a piston sleeve (40) and a piston (50) arranged in the piston sleeve (40) in a sliding manner, and the upper end surface of the piston sleeve (40) is in limit fit with the lower end surface of the upper limit plate (14) so as to prevent the piston sleeve (40) from displacing relative to the upper flange (11) in the radial direction;

the upper end of the piston sleeve (40) is limited and supported by the upper limiting plate (14);

the surface of the upper limiting plate (14) facing the piston sleeve (40) is provided with a third extending part (142), the upper end surface of the piston sleeve (40) is provided with a first limiting groove (42), and the third extending part (142) stretches into the first limiting groove (42) and is in limiting stop with the first limiting groove (42).

2. Pump body assembly according to claim 1, characterized in that it further comprises a lower flange (12) located below the piston assembly and a lower wear ring (60) arranged in the cylinder (20), the surface of the piston sleeve (40) facing the lower flange (12) being provided with a limit projection (43), the lower wear ring (60) being provided with a central hole, the limit projection (43) extending into the central hole of the lower wear ring (60) and being in limit stop with the lower flange (12) for preventing a radial displacement of the piston sleeve (40) relative to the lower flange (12).

3. Pump body assembly according to claim 2, characterized in that the surface of the lower flange (12) facing the piston sleeve (40) has a second limit groove (121), the limit projection (43) extending into the second limit groove (121) to prevent displacement of the piston sleeve (40) in radial direction with respect to the lower flange (12).

4. Pump body assembly according to claim 2, characterized in that the surface of the lower flange (12) facing the piston sleeve (40) has a second extension (122), which second extension (122) comes into limit stop with the limit projection (43) to prevent displacement of the piston sleeve (40) in radial direction with respect to the lower flange (12).

5. Pump body assembly according to claim 4, characterized in that the second extension (122) is located outside the limit projection (43).

6. Pump body assembly according to claim 4, characterized in that the second extension (122) is located inside the limit projection (43).

7. Pump body assembly according to claim 2, characterized in that the limit projection (43) is a collar extending towards the lower flange (12), and in that the collar is arranged coaxially with the piston sleeve (40).

8. Pump body assembly according to claim 2, characterized in that the limit projection (43) is a plurality of bosses extending towards the lower flange (12), and in that a plurality of said bosses are arranged at intervals along the circumference of the piston sleeve (40).

9. Pump body assembly according to claim 1, characterized in that it further comprises a structural member located below the cylinder (20), the lower end face of the piston sleeve (40) being provided with a limit projection (43), the limit projection (43) being in limit fit with the structural member to prevent displacement of the piston sleeve (40) in a radial direction relative to the structural member.

10. Pump body assembly according to claim 9, characterized in that the structural element located below the cylinder (20) is a lower flange (12).

11. Pump body assembly according to claim 10, characterized in that the surface of the lower flange (12) facing the piston sleeve (40) has a second limit groove (121), the limit projection (43) extending into the second limit groove (121) to prevent displacement of the piston sleeve (40) in radial direction with respect to the lower flange (12).

12. Pump body assembly according to claim 9, characterized in that the structural element comprises a lower flange (12) and a lower limiting plate (13), the lower limiting plate (13) being located between the cylinder (20) and the lower flange (12), the limiting projection (43) limiting stop with the lower limiting plate (13) to prevent displacement of the piston sleeve (40) in radial direction with respect to the lower limiting plate (13).

13. Pump body assembly according to claim 12, characterized in that the limit projection (43) extends into the central hole of the lower limit plate (13) and cooperates with the inner surface of the central hole of the lower limit plate (13) in a limit manner.

14. Pump body assembly according to claim 12, characterized in that the surface of the lower limiting plate (13) facing the piston sleeve (40) is provided with a third limiting groove (131), and the limiting projection (43) extends into the third limiting groove (131) and is in limiting stop with the third limiting groove (131).

15. The pump body assembly of claim 1, further comprising:

a lower flange (12) located below the piston assembly;

the rotating shaft (30), the rotating shaft (30) is sequentially arranged on the upper flange (11), the piston sleeve (40) and the lower flange in a penetrating mode, and the rotating shaft (30) is coaxially arranged with the upper flange (11) and the lower flange (12).

16. A fluid machine comprising a pump body assembly according to any one of claims 1 to 15.

17. A heat exchange device comprising the fluid machine of claim 16.