CN108799107B

CN108799107B - Pump body assembly, fluid machinery and heat exchange equipment

Info

Publication number: CN108799107B
Application number: CN201810793001.4A
Authority: CN
Inventors: 徐嘉; 杜忠诚; 杨森; 李直; 任丽萍; 梁社兵; 张荣婷; 史正良; 刘喜兴
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: 2024-06-18
Anticipated expiration: 2038-07-18
Also published as: CN108799107A

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 wear ring; the upper antifriction ring is positioned in the cylinder, and the upper flange is positioned above 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 upper wear-reducing ring 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

Pump body assembly, fluid machinery and heat exchange equipment

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 wear ring; the upper antifriction ring is positioned in the cylinder, and the upper flange is positioned above 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 upper wear-reducing ring 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 antifriction ring and is in limit fit with the inner surface of the central hole of the upper antifriction ring.

Further, the surface of the upper antifriction ring facing the piston sleeve is provided with a fifth limit groove, the upper end surface of the piston sleeve is provided with a first extension part, and the first extension part stretches into the fifth limit groove and is limited and stopped by the fifth limit groove.

Further, the surface of the upper wear ring facing the piston sleeve is provided with a fourth extension part which extends into the piston sleeve and is in limit stop with the inner surface of the piston sleeve.

Further, the surface of the upper antifriction ring facing the piston sleeve is provided with a fourth extension part, the upper end surface of the piston sleeve is provided with a first limit groove, and the fourth extension part stretches into the first limit groove and is limited and stopped by the first limit groove.

Further, the pump body assembly further comprises a structural member positioned below the air cylinder, and the upper end face of the structural member is provided with an extension part and is in limit fit with the piston sleeve through the extension part so as to prevent the piston sleeve from displacing relative to the structural member in the radial direction.

Further, the structural member is a 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 extension part is arranged on the upper end face of the lower limiting plate or the lower flange.

Further, the extension portion extends into the piston sleeve and is in limit stop with the inner surface of the piston sleeve.

Further, the lower end face of the piston sleeve is provided with a sixth limiting groove, and the extension part extends into the sixth limiting groove and is limited and stopped with the sixth 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, and the lower end face of the piston sleeve is in limit fit with the lower antifriction ring so as to prevent the piston sleeve from displacing in the radial direction relative to the lower flange.

Further, the surface of the piston sleeve facing the lower wear ring is provided with a limiting protrusion, and the limiting protrusion extends into the central hole of the lower wear ring and is in limiting fit with the inner surface of the central hole of the lower wear ring.

Further, the surface of the piston sleeve facing the lower antifriction ring is provided with a limiting protrusion, the surface of the lower antifriction ring facing the piston sleeve is provided with a seventh limiting groove, and the limiting protrusion extends into the seventh limiting groove and is in limiting stop with the seventh limiting groove.

Further, the surface of the lower wear ring facing the piston sleeve has a fifth extension which extends into the piston sleeve and comes into positive stop with the inner surface of the piston sleeve.

Further, the surface of the lower wear-reducing ring facing the piston sleeve is provided with a fifth extension part, the lower end surface of the piston sleeve is provided with a sixth limit groove, and the fifth extension part extends into the sixth limit groove and is in limit stop with the sixth limit 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 antifriction ring, a cylinder and a piston assembly. Wherein, the upper antifriction ring is located the cylinder, and the upper flange is located the top of 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 upper wear-reducing ring so as to prevent the piston sleeve from displacing relative to the upper flange in the radial direction. Like this, in the pump body subassembly operation in-process, the upper end of piston sleeve is spacing, support by last antifriction ring, 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 application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. 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 cross-sectional view of a piston sleeve of the pump body assembly of FIG. 1;

Fig. 4 shows a schematic exploded view of a second embodiment of a pump body assembly according to the invention;

FIG. 5 shows a cross-sectional view of the pump body assembly of FIG. 4;

FIG. 6 shows a schematic perspective view of an upper wear ring of the pump body assembly of FIG. 4;

FIG. 7 shows a cross-sectional view of a piston sleeve of the pump body assembly of FIG. 4;

FIG. 8 shows a schematic exploded view of a third embodiment of a pump body assembly according to the present invention;

FIG. 9 shows a cross-sectional view of the pump body assembly of FIG. 8;

FIG. 10 shows a schematic perspective view of an upper wear ring of the pump body assembly of FIG. 8;

FIG. 11 shows a cross-sectional view of a piston sleeve of the pump body assembly of FIG. 8;

FIG. 12 shows a schematic exploded view of a fourth embodiment of a pump body assembly according to the present invention;

FIG. 13 shows a cross-sectional view of the pump body assembly of FIG. 12;

FIG. 14 shows a schematic perspective view of an upper wear ring of the pump body assembly of FIG. 12;

FIG. 15 shows a cross-sectional view of a piston sleeve of the pump body assembly of FIG. 12;

FIG. 16 shows an exploded view of a fifth embodiment of a pump body assembly according to the present invention;

FIG. 17 shows a cross-sectional view of the pump body assembly of FIG. 16;

FIG. 18 shows a cross-sectional view of a piston sleeve of the pump body assembly of FIG. 16;

FIG. 19 shows a cross-sectional view of the lower stop plate of the pump body assembly of FIG. 16;

FIG. 20 shows an exploded view of a sixth embodiment of a pump body assembly according to the present invention;

FIG. 21 shows a cross-sectional view of the pump body assembly of FIG. 20;

FIG. 22 shows a cross-sectional view of the lower stop plate of the pump body assembly of FIG. 20;

FIG. 23 shows an exploded view of a seventh embodiment of a pump body assembly according to the present invention;

FIG. 24 shows a cross-sectional view of the pump body assembly of FIG. 23;

FIG. 25 shows a top view of the lower flange of the pump body assembly of FIG. 23;

FIG. 26 shows an exploded view of an eighth 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 a schematic perspective view of the lower wear ring of the pump body assembly of FIG. 26;

FIG. 29 shows a cross-sectional view of a piston sleeve of the pump body assembly of FIG. 26;

FIG. 30 shows a schematic exploded view of a ninth embodiment of a pump body assembly according to the present invention;

FIG. 31 shows a cross-sectional view of the pump body assembly of FIG. 30;

FIG. 32 shows a schematic perspective view of the lower wear ring of the pump body assembly of FIG. 30;

FIG. 33 shows a cross-sectional view of a piston sleeve of the pump body assembly of FIG. 30;

FIG. 34 shows a schematic exploded view of an embodiment of a pump body assembly according to the present invention;

FIG. 35 shows a cross-sectional view of the pump body assembly of FIG. 34;

FIG. 36 shows a schematic perspective view of the lower wear ring of the pump body assembly of FIG. 34; and

Fig. 37 shows a cross-sectional view of the piston sleeve of the pump body assembly of fig. 34.

Wherein the above figures include the following reference numerals:

11. An upper flange; 12. a lower flange; 13. a lower limit plate; 14. an upper limit plate; 20. a cylinder; 30. a rotating shaft; 40. a piston sleeve; 41. a first extension; 42. the first limit groove; 43. a limit protrusion; 44. a step surface; 45. a sixth limit groove; 50. a piston; 60. a lower wear ring; 61. a seventh limit groove; 62. a fifth extension; 70. an upper wear ring; 71. a fifth limit groove; 72. a fourth extension; 80. an extension.

Detailed Description

It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application 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.

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

Example 1

As shown in fig. 1 to 3, the pump body assembly includes an upper flange 11, an upper wear ring 70, a cylinder 20, and a piston assembly. Wherein the upper wear ring 70 is located within the cylinder 20 and the upper flange 11 is located above 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 upper wear ring 70 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 antifriction ring 70, 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 3, the upper end surface of the piston sleeve 40 has a first extension 41, and the first extension 41 extends into the central hole of the upper wear ring 70 and is in limit fit with the inner surface of the central hole of the upper wear ring 70. Specifically, during operation of the pump body assembly, the first extension portion 41 extends into the central hole of the upper wear ring 70 and can be in limit 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 relative to the upper flange 11 in the radial direction, 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 also includes a lower flange 12 below the cylinder 20. The upper end surface of the lower flange 12 has an eccentric boss, and the eccentric boss can extend into 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 antifriction ring 70, 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. 2, an eccentric boss provided at an upper end surface of the lower flange 12 protrudes into the piston sleeve 40 and comes into a limit stop with an inner surface of the piston sleeve 40. Specifically, the eccentric boss of the lower flange 12 extends into the inner surface of the piston sleeve 40 to perform a limit stop on the lower end of the piston sleeve 40, so as to realize the limit of the lower flange 12 to the radial direction of the piston sleeve 40.

The structure of the lower flange 12 is not limited to this. Optionally, the upper end surface of the lower flange 12 is planar.

As shown in fig. 1 and 2, the pump body assembly further includes a rotary shaft 30. The rotating shaft 30 sequentially penetrates through the upper flange 11, the piston sleeve 40 and the lower flange, and the rotating shaft 30 is coaxially arranged with the upper flange 11 and the lower flange 12. Specifically, during operation of the pump body assembly, the rotary shaft 30 rotates about the central axis of the upper flange 11, the piston sleeve 40 rotates about the central bore of the upper wear ring 70, the piston 50 reciprocates only relative to the piston sleeve 40, the piston 50 reciprocates relative to the rotary shaft 30, and the two reciprocations are perpendicular to each other, i.e., the operation of the pump body assembly follows the principles of a cross slide 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.

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

The 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 wear ring 70 and the lower flange 12 are structurally different.

As shown in fig. 4 to 7, the surface of the upper wear ring 70 facing the piston sleeve 40 has a fifth limiting groove 71, the upper end surface of the piston sleeve 40 has a first extension portion 41, and the first extension portion 41 extends into the fifth limiting groove 71 and is limited and stopped by the fifth limiting groove 71. Specifically, during the operation of the pump body assembly, the outer surface of the first extension portion 41 of the piston sleeve 40 and the groove wall of the fifth limit groove 71 are limited and stopped, so that the limit stop of the upper end of the piston sleeve 40 by the upper wear-reducing ring 70 is realized, the upper end of the piston sleeve 40 is prevented from being displaced in the radial direction relative to the upper flange 11, and the operation reliability of the pump body assembly is improved.

Optionally, the fifth limit groove 71 is an annular groove, and the annular groove is coaxially disposed with the central hole of the upper wear ring 70.

Alternatively, the first extension portion 41 has an annular structure, and the fifth limiting groove 71 is coaxially disposed with the first extension portion 41.

Example III

The pump body assembly in the third embodiment is different from the first embodiment in that: the upper wear ring 70 and the lower flange 12 are structurally different.

As shown in fig. 8 to 11, the surface of the upper wear ring 70 facing the piston sleeve 40 has a fourth extension 72, the fourth extension 72 protruding into the piston sleeve 40 and being in positive stop with the inner surface of the piston sleeve 40. Specifically, the inner surface of the piston sleeve 40 has a step surface 44, and the fourth extension 72 extends into the step surface 44 to limit the radial direction of the piston sleeve 40 by the upper wear ring 70.

Optionally, the fourth extension 72 is annular and the fourth extension 72 is coaxially disposed with the central bore of the upper wear ring 70.

The structure of the fourth extension portion 72 is not limited to this. Optionally, the fourth extension 72 is a double-layer annular structure, and the outermost annular structure performs a limit stop with the inner surface of the step surface 44. Thus, the above arrangement makes the structure of the fourth extension portion 72 more diverse, and thus makes the processing and manufacturing of the upper wear ring 70 easier and simpler, and reduces the labor intensity of workers.

Example IV

The pump body assembly in the fourth embodiment is different from the first embodiment in that: the upper wear ring 70, the piston sleeve 40 and the lower flange 12 are structurally different.

As shown in fig. 12 to 15, the surface of the upper wear ring 70 facing the piston sleeve 40 has a fourth extension 72, the upper end surface of the piston sleeve 40 has a first limit groove 42, and the fourth extension 72 extends into the first limit groove 42 and is limited and stopped by the first limit groove 42. Specifically, during the operation of the pump body assembly, the fourth extension portion 72 extends into the first limiting groove 42, so that the outer surface of the fourth extension portion 72 and the groove wall of the first limiting groove 42 limit and stop, so as to realize the limit of the upper antifriction ring 70 to the radial direction of the piston sleeve 40.

In the present embodiment, the fourth extension portion 72 and the first limiting groove 42 are annular, and the fourth extension portion 72, the first limiting groove 42 and the piston sleeve 40 are coaxially disposed. The structure is simple and easy to realize and process.

Example five

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

As shown in fig. 16 to 19, the pump body assembly further includes a structural member located below the cylinder 20, and an upper end surface of the structural member has an extension portion 80 and performs a limit fit with the piston sleeve 40 through the extension portion 80, so as to prevent the piston sleeve 40 from being displaced in a radial direction relative to the structural member. The structural member comprises a lower flange 12 and a lower limiting plate 13, wherein the lower limiting plate 13 is positioned between the air cylinder 20 and the lower flange 12, and the extension part 80 is arranged on the upper end surface of the lower limiting plate 13. Specifically, the upper flange and the lower flange are used for supporting the rotating shaft 30, the lower limiting plate 13 is used for limiting and stopping the lower end of the piston sleeve 40, so that the piston sleeve 40 is prevented from being displaced in the radial direction relative to the lower flange 12 and the lower limiting plate 13, and the working reliability of the pump body assembly is further improved.

As shown in fig. 18, the inner surface of the lower end of the piston sleeve 40 has a stepped surface 44, and the extension 80 extends into the piston sleeve 40 and is stopped by the stepped surface 44, so as to prevent the lower end of the piston sleeve 40 from being displaced in a radial direction relative to the lower stop plate 13 and the lower flange 12.

In other embodiments not shown in the drawings, the extension is provided at the upper end face of the lower flange. Specifically, the extension portion on the lower flange performs a limit stop on the lower end of the piston sleeve to prevent the lower end of the piston sleeve from being displaced in the radial direction with respect to the lower flange (lower limit plate). Meanwhile, the upper end of the piston sleeve is supported by the upper flange in a limiting manner, so that the upper end and the lower end of the piston sleeve are supported in a limiting manner, the influence on the normal operation of the pump body assembly due to structural interference between the piston sleeve and the piston or the cylinder is avoided, and the operation reliability and the working performance of the pump body assembly are improved.

Example six

The pump body assembly in the sixth embodiment is different from the fifth embodiment in that: the piston sleeve 40 is different in structure.

As shown in fig. 20 to 22, the lower end surface of the piston sleeve 40 has a sixth limiting groove 45, and the extension portion 80 extends into the sixth limiting groove 45 and is in limiting stop with the sixth limiting groove 45. Specifically, during the operation of the pump body assembly, the extension portion 80 of the lower limiting plate 13 extends into the sixth limiting groove 45 of the piston sleeve 40, so as to limit and support the lower end of the piston sleeve 40 by the lower limiting plate 13. Meanwhile, the upper end of the piston sleeve 40 is limited and stopped by the upper antifriction ring 70, so that the upper end and the lower end of the piston sleeve 40 are both supported in a limited 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 of the pump body assembly is improved.

Example seven

The pump body assembly in the seventh embodiment differs from the first embodiment in that: the pump body components are structurally different.

As shown in fig. 23 to 25, the pump body assembly further includes a lower flange 12 located below the piston assembly and a lower wear ring 60 provided in the cylinder 20, and a lower end surface of the piston sleeve 40 is in a limit fit with the lower wear ring 60 to prevent displacement of the piston sleeve 40 in a radial direction with respect to the lower flange 12. The surface of the piston sleeve 40 facing the lower wear ring 60 is provided with a limiting protrusion 43, and the limiting protrusion 43 extends into the central hole of the lower wear ring 60 and is in limiting fit with the inner surface of the central hole of the lower wear ring 60. In this way, the lower wear ring 60 is rotatably disposed within the cylinder 20, and the lower wear ring 60 provides a positive stop against the lower end of the piston sleeve 40. Meanwhile, the upper end of the piston sleeve 40 is supported in a limiting manner by the upper antifriction ring 70, 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 limiting protrusion 43 extends into the central hole of the lower wear ring 60, and the outer surface of the limiting protrusion 43 is in limiting stop with the wall of the central hole of the lower wear ring 60, so as to realize the limiting stop of the lower wear ring 60 on the limiting protrusion 43. The structure is simple and easy to realize.

Example eight

The pump body assembly in the eighth embodiment differs from that in the seventh embodiment in that: the lower wear ring 60 is structurally different.

As shown in fig. 26 to 29, the surface of the piston sleeve 40 facing the lower wear ring 60 has a limit projection 43, the surface of the lower wear ring 60 facing the piston sleeve 40 has a seventh limit groove 61, and the limit projection 43 extends into the seventh limit groove 61 and is in limit stop with the seventh limit groove 61. Specifically, during the operation of the pump body assembly, the limiting protrusion 43 of the piston sleeve 40 extends into the seventh limiting groove 61 of the lower wear ring 60, and the groove wall of the seventh limiting groove 61 and the outer surface of the limiting protrusion 43 limit stop, so as to realize the limiting fit between the lower wear ring 60 and the lower end of the piston sleeve 40, and prevent the lower end of the piston sleeve 40 from displacing in the radial direction relative to the lower flange 12.

Alternatively, the limiting protrusion 43 and the seventh limiting groove 61 are annular, and the limiting protrusion 43, the seventh limiting groove 61 and the piston sleeve 40 are coaxially disposed. Wherein the seventh limit groove 61 is arranged coaxially with the central hole of the lower wear ring 60. The structure is simple and easy to realize and process.

Example nine

The pump body assembly in the ninth embodiment differs from the eighth embodiment in that: the lower wear ring 60 is structurally different.

As shown in fig. 30 to 33, the surface of the lower wear ring 60 facing the piston sleeve 40 has a fifth extension 62, the fifth extension 62 protruding into the piston sleeve 40 and being in positive stop with the inner surface of the piston sleeve 40. Specifically, the inner surface of the piston sleeve 40 has a step surface 44, and the fifth extension 62 extends into the step surface 44 to limit the radial direction of the piston sleeve 40 by the lower wear ring 60.

Optionally, the fifth extension 62 is annular and the fifth extension 62 is coaxially arranged with the central bore of the lower wear ring 60.

The structure of the fifth extension 62 is not limited to this. Optionally, the fifth extension 62 is a double-layer annular structure, and the outermost annular structure performs a limit stop with the inner surface of the step surface 44. Thus, the above arrangement makes the structure of the fifth extension 62 more diverse, and thus makes the processing and manufacturing of the lower wear ring 60 easier and simpler, and reduces the labor intensity of workers.

Examples ten

The pump body assembly in the tenth embodiment differs from that in the seventh embodiment in that: the piston sleeve 40 is different in structure.

As shown in fig. 34 to 37, the surface of the lower wear ring 60 facing the piston sleeve 40 has a fifth extension 62, the lower end surface of the piston sleeve 40 has a sixth limit groove 45, and the fifth extension 62 extends into the sixth limit groove 45 and is in limit stop with the sixth limit groove 45. In this way, the fifth extension 62 extends into the sixth limiting groove 45, so that the pump body assembly is more compact. Meanwhile, the structure is simple and easy to realize.

Specifically, during operation of the pump body assembly, the fifth extension 62 of the lower wear ring 60 extends into the sixth limiting groove 45 of the piston sleeve 40 to limit and support the lower end of the piston sleeve 40 by the lower wear ring 60. Meanwhile, the upper end of the piston sleeve 40 is limited and stopped by the upper antifriction ring 70, so that the upper end and the lower end of the piston sleeve 40 are both supported in a limited 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 of the pump body assembly is improved.

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 antifriction ring, 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 exemplary embodiments according to 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 the 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 application described herein may be implemented in sequences other than those illustrated or otherwise 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 wear ring (70);

-a cylinder (20), said upper wear ring (70) being located inside said cylinder (20), said upper flange (11) being located above said cylinder (20);

The piston assembly is arranged in the 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 upper wear-reducing ring (70) so as to prevent the piston sleeve (40) from displacing relative to the upper flange (11) in the radial direction;

The pump body assembly further comprises a structural member positioned below the air cylinder (20), wherein the upper end surface of the structural member is provided with an extension part (80) and is in limit fit with the piston sleeve (40) through the extension part (80) so as to prevent the piston sleeve (40) from displacing relative to the structural member in the radial direction;

the lower end surface of the piston sleeve (40) is provided with a sixth limit groove (45), and the extension part (80) stretches into the sixth limit groove (45) and is in limit stop with the sixth limit groove (45);

Wherein the structural member is a lower flange (12); or the structural member comprises a lower flange (12) and a lower limiting plate (13), wherein the lower limiting plate (13) is positioned between the air cylinder (20) and the lower flange (12), and the extension part (80) is arranged on the upper end face of the lower limiting plate (13) or the lower flange (12).

2. Pump body assembly according to claim 1, characterized in that the upper end face of the piston sleeve (40) has a first extension (41), the first extension (41) extending into the central bore of the upper wear ring (70) and being in positive engagement with the inner surface of the central bore of the upper wear ring (70).

3. Pump body assembly according to claim 1, characterized in that the surface of the upper wear ring (70) facing the piston sleeve (40) is provided with a fifth limit groove (71), the upper end surface of the piston sleeve (40) is provided with a first extension (41), and the first extension (41) extends into the fifth limit groove (71) and is in limit stop with the fifth limit groove (71).

4. Pump body assembly according to claim 1, characterized in that the surface of the upper wear ring (70) facing the piston sleeve (40) has a fourth extension (72), which fourth extension (72) protrudes into the piston sleeve (40) and comes into limit stop with the inner surface of the piston sleeve (40).

5. Pump body assembly according to claim 1, characterized in that the surface of the upper wear ring (70) facing the piston sleeve (40) is provided with a fourth extension (72), the upper end surface of the piston sleeve (40) is provided with a first limit groove (42), and the fourth extension (72) extends into the first limit groove (42) and is in limit stop with the first limit groove (42).

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

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

7. A fluid machine comprising a pump body assembly according to any one of claims 1 to 6.

8. A heat exchange device comprising the fluid machine of claim 7.