CN108799109B

CN108799109B - Pump body assembly, fluid machinery and heat exchange equipment

Info

Publication number: CN108799109B
Application number: CN201810793005.2A
Authority: CN
Inventors: 杜忠诚; 梁社兵; 任丽萍; 杨森; 李直; 张荣婷; 史正良; 丁宁; 许甲岿; 马利亚
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: 2024-04-02
Anticipated expiration: 2038-07-18
Also published as: CN108799109A

Abstract

The invention provides a pump body assembly, a fluid machine and heat exchange equipment. Wherein, pump body subassembly includes: at least two structural members; the cylinder is arranged between the two structural members; 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, an extending part is arranged on the upper end face of a structural member positioned below the piston sleeve, and the structural member is in limit fit with the piston sleeve through the extending part so as to prevent the piston sleeve from displacing relative to the structural member 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: at least two structural members; the cylinder is arranged between the two structural members; 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, an extending part is arranged on the upper end face of a structural member positioned below the piston sleeve, and the structural member is in limit fit with the piston sleeve through the extending part so as to prevent the piston sleeve from displacing relative to the structural member in the radial direction.

Further, the structural member includes 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 upper end face of the piston sleeve is in limit fit with the lower end face of the structural member above the piston sleeve, so that the piston sleeve is prevented from displacing in the radial direction relative to the structural member.

Further, the structural member above the piston sleeve is an upper flange.

Further, the upper end face of the piston sleeve is provided with a first extension part, the lower end face of the upper flange is provided with a concave part, and the first extension part extends into the concave part and is limited and stopped with the concave part in the radial direction of the piston sleeve.

Further, the lower end face of the upper flange is provided with a limiting part extending towards the piston sleeve, and the limiting part and the piston sleeve limit stops so as to prevent the piston sleeve from displacing in the radial direction relative to the upper flange.

Further, the limiting part stretches into the piston sleeve and is limited and stopped with the inner surface of the piston sleeve.

Further, the upper end face of the piston sleeve is provided with a first limiting groove, and the limiting part stretches into the first limiting groove and is limited and stopped with the first limiting groove.

Further, the structural member comprises an upper flange and an upper limiting plate, wherein the upper limiting plate is positioned between the upper flange and the cylinder, and the upper end face of the piston sleeve is in limiting fit with the lower end face of the upper limiting plate so as to prevent the piston sleeve from displacing in the radial direction relative to the upper flange.

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 structure comprises an upper flange and an upper limiting plate, the upper limiting plate is located between the upper flange and the cylinder, the upper end face of the piston sleeve is provided with a first extending portion, and the first extending portion stretches into a central hole of the upper limiting plate and is in limiting fit with the lower end face of the upper flange so as to prevent the piston sleeve from displacing in the radial direction relative to the upper flange.

Further, the lower end face of the upper flange is provided with a concave part, and the first extension part extends into the concave part and is limited and stopped with the concave part in the radial direction of the piston sleeve.

Further, the lower end face of the upper flange is provided with a limiting part extending towards the piston sleeve, and the limiting part and the first extending part limit the stop, so that the piston sleeve is prevented from displacing in the radial direction relative to the upper flange.

Further, the at least two structural members further include an upper flange located above the piston assembly, and the pump body assembly further includes: 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 at least two structural members, a cylinder and a piston assembly. Wherein the cylinder is disposed between the two structural members. The piston assembly is arranged in the cylinder, the piston assembly comprises a piston sleeve and a piston arranged in the piston sleeve in a sliding manner, an extension part is arranged on the upper end face of a structural member positioned below the piston sleeve, and the structural member 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. Like this, in the pump body subassembly operation in-process, the extension that is located the structure of piston sleeve below can carry out limit stop to the piston sleeve, and then avoids the piston sleeve to take 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 the piston sleeve of pump body subassembly among the prior art, has influenced pump body subassembly work efficiency's problem, 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 perspective view of a first embodiment of a pump body assembly according to the invention;

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

FIG. 3 shows a top view of a lower flange 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 cross-sectional view of the lower stop plate of the pump body assembly of FIG. 4;

FIG. 7 shows a schematic exploded view of a third embodiment of a pump body assembly according to the present invention;

FIG. 8 shows a cross-sectional view of the pump body assembly of FIG. 7;

FIG. 9 shows a cross-sectional view of the lower stop plate of the pump body assembly of FIG. 7;

FIG. 10 shows a cross-sectional view of a piston sleeve of the pump body assembly of FIG. 7;

FIG. 11 shows a schematic exploded view of a fourth embodiment of a pump body assembly according to the present invention;

FIG. 12 shows a cross-sectional view of the pump body assembly of FIG. 11;

FIG. 13 shows a schematic perspective view of the upper flange of the pump body assembly of FIG. 11;

FIG. 14 shows a top view of the lower flange of the pump body assembly of FIG. 11;

FIG. 15 shows an exploded view of a fifth embodiment of a pump body assembly according to the present invention;

FIG. 16 shows a cross-sectional view of the pump body assembly of FIG. 15;

FIG. 17 shows a schematic perspective view of the upper flange of the pump body assembly of FIG. 15;

FIG. 18 shows a cross-sectional view of a piston sleeve of the pump body assembly of FIG. 15;

FIG. 19 shows a top view of the lower flange of the pump body assembly of FIG. 15;

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 schematic perspective view of the upper flange of the pump body assembly of FIG. 20;

FIG. 23 shows a cross-sectional view of the lower stop plate of the pump body assembly of FIG. 20;

FIG. 24 shows a cross-sectional view of a piston sleeve of the pump body assembly of FIG. 20;

FIG. 25 shows an exploded view of a seventh embodiment of a pump body assembly according to the present invention;

FIG. 26 shows a cross-sectional view of the pump body assembly of FIG. 25;

FIG. 27 shows a cross-sectional view of the lower stop plate of the pump body assembly of FIG. 25;

FIG. 28 shows a cross-sectional view of the upper stop plate of the pump body assembly of FIG. 25;

FIG. 29 shows a cross-sectional view of a piston sleeve of the pump body assembly of FIG. 25;

FIG. 30 shows an exploded view of an eighth 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 cross-sectional view of the upper stop plate of the pump body assembly of FIG. 30;

FIG. 33 shows a cross-sectional view of the lower stop plate of the pump body assembly of FIG. 30;

FIG. 34 shows a cross-sectional view of a piston sleeve of the pump body assembly of FIG. 30;

FIG. 35 shows a schematic exploded view of a ninth embodiment of a pump body assembly according to the present invention;

FIG. 36 shows a cross-sectional view of the pump body assembly of FIG. 35;

FIG. 37 shows a cross-sectional view of the upper stop plate of the pump body assembly of FIG. 35;

FIG. 38 shows a cross-sectional view of the lower stop plate of the pump body assembly of FIG. 35;

FIG. 39 shows a cross-sectional view of a piston sleeve of the pump body assembly of FIG. 35;

FIG. 40 shows a schematic exploded view of an embodiment of a pump body assembly according to the present invention;

FIG. 41 shows a cross-sectional view of the pump body assembly of FIG. 40;

FIG. 42 shows a bottom view of the upper flange of the pump body assembly of FIG. 40;

FIG. 43 shows a cross-sectional view of the upper flange of FIG. 42;

FIG. 44 shows a cross-sectional view of the lower stop plate of the pump body assembly of FIG. 40; and

fig. 45 shows a cross-sectional view of a piston sleeve of the pump body assembly of fig. 40.

Wherein the above figures include the following reference numerals:

11. an upper flange; 111. a concave portion; 112. a limit part; 12. a lower flange; 13. a lower limit plate; 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; 44. a step surface; 45. a sixth limit groove; 50. a piston; 80. an extension.

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 two structural members, a cylinder 20, and a piston assembly. Wherein the cylinder 20 is arranged between two structural members. 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, an extension part 80 is arranged on the upper end surface of a structural member positioned below the piston sleeve 40, and the structural member 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.

By applying the technical scheme of the embodiment, in the operation process of the pump body assembly, the extension part 80 of the structural part below the piston sleeve 40 can limit the piston sleeve 40, 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. 3, the structural member includes a lower flange 12. Specifically, the extension portion 80 is disposed on an upper end surface of the lower flange 12, and limit stop of the lower flange 12 to the radial direction of the piston sleeve 40 is achieved through limit fit between the extension portion 80 and the piston sleeve 40. In the operation process of the pump body assembly, the extension part 80 extends into the piston sleeve 40 and is in limit stop with the inner surface of the piston sleeve 40 so as to limit stop the piston sleeve 40 in the radial direction, prevent the lower end of the piston sleeve 40 from displacing in the radial direction relative to the lower flange 12, avoid the structural interference of the piston sleeve 40 and the piston 50 or the cylinder 20 to influence the normal operation of the pump body assembly, and improve the operation reliability and the working performance of the pump body assembly.

In the present embodiment, the extension 80 is an eccentric boss, and the eccentric amount of the eccentric boss on the lower flange 12 is e.

As shown in fig. 1 and 2, the pump body assembly further includes an upper flange 11 and a rotary shaft 30. Wherein the upper flange 11 is located above the piston assembly. The rotating shaft 30 sequentially penetrates through the upper flange 11, the piston sleeve 40 and the lower flange 12, and the rotating shaft 30 is coaxially arranged 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 rotates around the central axis of the concave part 111, the piston 50 only reciprocates relative to the piston sleeve 40, the piston 50 reciprocates relative to the rotary shaft 30, and the two reciprocating motions 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.

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 structure of the structural members is different.

As shown in fig. 4 to 6, 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 extension 80 is disposed on an upper end surface of the lower limiting plate 13. Specifically, the extension portion 80 on the lower limiting plate 13 extends into the piston sleeve 40 and is in limit stop with the inner surface of the piston sleeve 40, so as to limit stop the piston sleeve 40 in the radial direction, prevent the lower end of the piston sleeve 40 from displacing in the radial direction relative to the lower limiting plate 13 and the lower flange 12, avoid the piston sleeve 40 from interfering with the piston 50 or the cylinder 20 in a structure to affect the normal operation of the pump body assembly, and improve the operation reliability and the working performance of the pump body assembly.

Alternatively, the extension 80 is an annular protrusion, and the annular protrusion is disposed coaxially with the central hole of the lower limiting plate 13.

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 III

The pump body assembly in the third embodiment differs from the second embodiment in that: the structure of the piston sleeve 40 and the arrangement position of the extension 80 are different.

As shown in fig. 7 to 10, the extension portion 80 is disposed on the lower limiting plate 13, 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 limit stop with the sixth limiting groove 45. Specifically, in the operation process of the pump body assembly, the lower limiting plate 13 is fixedly connected with the lower flange 12, the extension portion 80 of the lower limiting plate 13 extends into the sixth limiting groove 45 of the piston sleeve 40, and limiting stop is performed on the sixth limiting groove 45, so that the lower end of the piston sleeve 40 is limited and supported by the lower limiting plate 13, the lower end of the piston sleeve 40 is supported and limited by the lower limiting plate 13, the normal operation of the pump body assembly is prevented from being influenced by structural interference between the piston sleeve 40 and the piston 50 or the cylinder 20, and the operation reliability and the working performance of the pump body assembly are improved.

Alternatively, the extension portion 80 and the sixth limiting groove 45 are in an annular structure, and the extension portion 80 and the center hole of the lower limiting plate 13 are coaxially disposed, and the extension portion 80 and the sixth limiting groove 45 are coaxially disposed. The structure is simple and easy to realize.

The structure of the extension 80 is not limited to this. Optionally, the extension 80 is formed from a plurality of arcuate segments, with the plurality of arcuate segments being spaced apart.

Example IV

The pump body assembly in the fourth embodiment is different from the first embodiment in that: the upper flange 11 has a different structure.

As shown in fig. 11 to 14, the upper end surface of the sleeve 40 is in a limit fit with the lower end surface of the structural member located above the sleeve 40 to prevent displacement of the sleeve 40 in the radial direction relative to the structural member. Wherein the structural member above the piston sleeve 40 is the upper flange 11. Specifically, the upper flange 11 can perform a limit stop in the radial direction on the upper end of the piston sleeve 40. Meanwhile, the lower flange 12 can limit and stop the lower end of the piston sleeve 40 in the radial direction, so that the upper end and the lower end of the piston sleeve 40 are both limited and supported, and the operation reliability and the operation stability of the pump body assembly are improved.

Specifically, the upper end surface of the piston sleeve 40 has a first extension 41, the lower end surface of the upper flange 11 has a recess 111, and the first extension 41 extends into the recess 111 and comes into a limit stop with the recess 111 in the radial direction of the piston sleeve 40. In this way, the first extension 41 of the piston sleeve 40 extends into the recess 111 of the upper flange 11 and stops with the recess 111, so as to realize radial limitation of the upper flange 11 to the piston sleeve 40. In the operation process of the pump body assembly, the concave part 111 and the first extension part 41 limit the stop, so that the first extension part 41 is guaranteed to rotate in the concave part 111, and the first extension part 41 cannot shift in the radial direction, so that the upper flange 11 is used for limiting and supporting the upper end of the piston sleeve 40, the piston sleeve 40 is prevented from eccentric and oblique rotation, the normal operation of the pump body assembly is guaranteed, and the working reliability of the pump body assembly is improved.

In the present embodiment, the first extension portion 41 and the recess 111 are annular, and the first extension portion 41, the recess 111, and the piston sleeve 40 are coaxially disposed. Thus, the piston sleeve 40 is eccentrically disposed from 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 (or the central axis of the recess 111) in the recess 111 of the upper flange 11, so as to ensure the limit and support reliability of the upper flange 11 to the piston sleeve 40.

The structure of the first extension 41 is not limited to this. Optionally, the first extension 41 is a double-layer annular structure, and at least one layer of annular structure performs a limit stop with the inner groove wall or the outer groove wall of the recess 111. 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.

In other embodiments not shown in the drawings, the first extension is a plurality of boss structures, and the plurality of bosses are disposed at intervals along the circumferential direction of the piston sleeve.

In the present embodiment, the recess 111 is a groove. The structure is simple and easy to process and realize.

In the present embodiment, the groove width of the groove is larger than the thickness of the first extension 41. Like this, above-mentioned setting guarantees that first extension 41 is located the recess, and then guarantees that the recess can carry out limit stop to first extension 41, promotes the spacing reliability of flange 11 to piston sleeve 40, promotes the operational reliability of pump body subassembly.

In the present embodiment, a predetermined distance is provided between the inner groove wall of the groove and the surface of the first extension 41 on the side close to the center of the piston sleeve 40, and the predetermined distance is 5um or more and 40um or less. Specifically, the inner groove wall of the groove performs a limit stop on the surface of the first extension 41 on the side close to the center of the piston sleeve 40, preventing radial displacement therebetween. Meanwhile, in order to ensure that the piston sleeve 40 can normally rotate, a predetermined distance is reserved between the inner side groove wall of the groove and the surface of the first extension portion 41, which is close to the center side of the piston sleeve 40, so that the groove can radially limit the first extension portion 41, the first extension portion 41 can rotate relative to the groove, and the operation reliability of the pump body assembly is further improved.

In the present embodiment, the concave portion 111 is provided eccentrically to the upper flange 11, and the eccentric amount is e. Therefore, the eccentric amount of the pump body assembly is determined in the mode, so that the eccentric amount of the pump body assembly is easier to ensure, and the determination of the eccentric amount e is more reliable and simpler.

Example five

The pump body assembly in the fifth embodiment differs from the fourth embodiment in that: the upper flange 11 and the piston housing 40 are different in structure.

As shown in fig. 15 to 19, the lower end surface of the upper flange 11 has a limiting portion 112 extending toward the piston sleeve 40, and the limiting portion 112 is in limiting stop with the piston sleeve 40 to prevent the piston sleeve 40 from being displaced in the radial direction relative to the upper flange 11. Specifically, the limiting part 112 extends into the piston sleeve 40 and is in limiting stop with the inner surface of the piston sleeve 40, the inner surface of the piston sleeve 40 is provided with the step surface 44, the step surface 44 is positioned at the end part of the piston sleeve 40, which faces the upper flange 11, and the limiting part 112 is in limiting fit with the step surface 44, so that the radial limiting of the upper flange 11 to the piston sleeve 40 is realized, the piston sleeve 40 is prevented from shifting in the radial direction, the limiting and supporting of the upper flange 11 to the upper end of the piston sleeve 40 are realized, the piston sleeve 40 is prevented from eccentric and oblique rotation, the normal running of a pump body assembly is ensured, and the working reliability of the pump body assembly is improved.

In the present embodiment, the limiting portion 112 has an annular structure and is disposed coaxially with the piston sleeve 40. The limiting portion 112 is eccentrically disposed with respect to the upper flange 11, and the eccentric amount is e. Therefore, the eccentric amount of the pump body assembly is determined in the mode, so that the eccentric amount of the pump body assembly is easier to ensure, and the determination of the eccentric amount e is more reliable and simpler.

Example six

The pump body assembly in the sixth embodiment is different from the second embodiment in that: the structure of the structural member, the piston sleeve 40 and the upper flange 11 are different.

As shown in fig. 20 to 24, the structural member further includes an upper flange 11 and an upper limiting plate 14, the upper limiting plate 14 is located between the upper flange 11 and the cylinder 20, and an upper end surface of the piston sleeve 40 is in limiting fit with a lower end surface of the upper limiting plate 14, so as to prevent the piston sleeve 40 from being displaced in a radial direction relative to the upper flange 11. The lower limiting plate 13 has an extension portion 80, and the extension portion 80 extends into the piston sleeve 40. Like this, in the pump body subassembly operation in-process, the upper end of piston sleeve 40 is spacing, support by last limiting plate 14, and then prevents that piston sleeve 40 from taking place radial direction ascending removal in the operation in-process, guarantees that piston sleeve 40 can normally rotate, has solved the piston sleeve of the pump body subassembly among the prior art and has easily taken place eccentric rotation, influence pump body subassembly work efficiency's problem.

Specifically, 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 hole wall 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.

In this embodiment, the lower end surface of the upper flange 11 has a limiting portion 112 extending toward the piston sleeve 40, and the limiting portion 112 is located inside the first extending portion 41 to limit the first extending portion 41. Specifically, during operation of the pump body assembly, the first extension portion 41 of the piston sleeve 40 is limited by the central hole of the upper limiting plate 14 and the radial direction of the limiting portion 112, so as to further prevent the upper end of the piston sleeve 40 from being displaced in the radial direction relative to the upper flange 11.

Example seven

The pump body assembly in the seventh embodiment differs from that in the sixth embodiment in that: the upper limiting plate 14 and the upper flange 11 are different in structure.

As shown in fig. 25 to 29, 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 eight

The pump body assembly in the eighth embodiment differs from that in the sixth embodiment in that: the upper limiting plate 14 and the upper flange 11 are different in structure.

As shown in fig. 30 to 34, 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. Specifically, the inner surface of the piston sleeve 40 has a step surface 44, the step surface 44 is located at the end of the piston sleeve 40 facing the upper flange 11, and the third extension portion 142 extends into the step surface 44 of the piston sleeve 40 to limit the step surface 44 to limit the upper flange 11 to the radial direction of the piston sleeve 40.

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 nine

The pump body assembly in the ninth embodiment differs from the sixth embodiment in that: the upper flange 11, the upper limiting plate 14 and the piston bush 40 are different in structure.

As shown in fig. 35 to 39, the surface of the upper limiting plate 14 facing the piston sleeve 40 is provided with a third extending portion 142, the upper end surface of the piston sleeve 40 is provided with 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.

Examples ten

The pump body assembly in the tenth embodiment differs from the sixth embodiment in that: the structure of the structural members is different.

As shown in fig. 40 to 45, the structural member includes an upper flange 11 and an upper limiting plate 14, the upper limiting plate 14 is located between the upper flange 11 and the cylinder 20, the upper end surface of the piston sleeve 40 has a first extension portion 41, and the first extension portion 41 extends into a central hole of the upper limiting plate 14 and is in limiting fit with the lower end surface of the upper flange 11, so as to prevent the piston sleeve 40 from displacing relative to the upper flange 11 in a radial direction. Specifically, in the operation process of the pump body assembly, the first extension part 41 of the piston sleeve 40 stretches into the central hole of the upper limiting plate 14 and is in limiting fit with the lower end face of the upper flange 11, the upper flange 11 plays a role in limiting and supporting the piston sleeve 40, further, 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, and the problems that in the prior art, the piston sleeve of the pump body assembly is easy to eccentrically rotate and the working efficiency of the pump body assembly is affected are solved.

As shown in fig. 43, the lower end surface of the upper flange 11 has a recess 111, and the first extension 41 extends into the recess 111 and stops with the recess 111 to prevent the piston sleeve 40 from being displaced in the radial direction relative to the upper flange 11. In the operation process of the pump body assembly, the outer surface of the first extension part 41 and the inner wall surface of the concave part 111 can be in limit fit, so that radial displacement between the two is prevented, further, the piston sleeve 40 is prevented from being displaced in the radial direction relative to the upper flange 11, stable operation of the piston sleeve 40 is ensured, and the operation reliability and the working efficiency of the pump body assembly are improved.

Alternatively, the recess 111 is an annular groove.

Alternatively, the recess 111 is eccentrically provided on the upper flange 11, and the eccentric amount is e.

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 extension part of the structural part below the piston sleeve can limit the piston sleeve, 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:

at least two structural members;

a cylinder (20) arranged between two of said structural members;

the piston assembly is arranged in the air cylinder (20), the piston assembly comprises a piston sleeve (40) and a piston (50) arranged in the piston sleeve (40) in a sliding manner, an extension part (80) is arranged on the upper end face of the structural part below the piston sleeve (40), and the structural part 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 part in the radial direction;

the extension part (80) extends into the piston sleeve (40) and is in limit stop with the inner surface of the piston sleeve (40); or, 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).

2. Pump body assembly according to claim 1, characterized in that the structural member comprises a lower flange (12).

3. Pump body assembly according to claim 1, characterized in that the structural member 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 extension (80) being provided at the upper end face of the lower limiting plate (13) or the lower flange (12).

4. A pump body assembly according to any one of claims 1 to 3, wherein the upper end face of the piston sleeve (40) is in positive engagement with the lower end face of the structural member located above the piston sleeve (40) to prevent displacement of the piston sleeve (40) in a radial direction relative to the structural member.

5. Pump body assembly according to claim 4, characterized in that the structural element located above the piston sleeve (40) is an upper flange (11).

6. Pump body assembly according to claim 5, characterized in that the upper end face of the piston sleeve (40) has a first extension (41), the lower end face of the upper flange (11) has a recess (111), the first extension (41) projects into the recess (111) and comes into limit stop with the recess (111) in the radial direction of the piston sleeve (40).

7. Pump body assembly according to claim 5, characterized in that the lower end face of the upper flange (11) has a stop (112) extending towards the piston sleeve (40), the stop (112) being in a stop with the piston sleeve (40) to prevent displacement of the piston sleeve (40) in a radial direction with respect to the upper flange (11).

8. Pump body assembly according to claim 7, characterized in that the stop (112) extends into the piston sleeve (40) and stops against the inner surface of the piston sleeve (40).

9. The pump body assembly according to claim 7, wherein the upper end surface of the piston sleeve (40) is provided with a first limit groove (42), and the limit part (112) extends into the first limit groove (42) and is limited and stopped by the first limit groove (42).

10. A pump body assembly according to any one of claims 1 to 3, wherein the structural member comprises an upper flange (11) and an upper limiting plate (14), the upper limiting plate (14) being located between the upper flange (11) and the cylinder (20), an upper end face of the piston sleeve (40) being in limiting engagement with a lower end face of the upper limiting plate (14) to prevent displacement of the piston sleeve (40) in a radial direction relative to the upper flange (11).

11. Pump body assembly according to claim 10, 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 hole of the upper limit plate (14) and being in limit fit with the inner surface of the central hole of the upper limit plate (14).

12. Pump body assembly according to claim 10, characterized in that the surface of the upper limit plate (14) facing the piston sleeve (40) is provided with a fourth limit groove (141), the upper end surface of the piston sleeve (40) is provided with a first extension (41), and the first extension (41) extends into the fourth limit groove (141) and is limited to stop with the fourth limit groove (141).

13. The pump body assembly according to claim 10, wherein the surface of the upper limit plate (14) facing the piston sleeve (40) has a third extension (142), the third extension (142) extending into the piston sleeve (40) and limiting stop with the inner surface of the piston sleeve (40).

14. The pump body assembly according to claim 10, wherein a surface of the upper limit plate (14) facing the piston sleeve (40) is provided with a third extension portion (142), an upper end surface of the piston sleeve (40) is provided with a first limit groove (42), and the third extension portion (142) extends into the first limit groove (42) and is in limit stop with the first limit groove (42).

15. A pump body assembly according to any one of claims 1 to 3, wherein the structural member comprises an upper flange (11) and an upper limiting plate (14), the upper limiting plate (14) being located between the upper flange (11) and the cylinder (20), the upper end face of the piston sleeve (40) having a first extension (41), the first extension (41) extending into a central hole of the upper limiting plate (14) and into limiting engagement with a lower end face of the upper flange (11) to prevent displacement of the piston sleeve (40) in a radial direction relative to the upper flange (11).

16. Pump body assembly according to claim 15, characterized in that the lower end face of the upper flange (11) has a recess (111), the first extension (41) protruding into the recess (111) and limiting stop with the recess (111) in the radial direction of the piston sleeve (40).

17. Pump body assembly according to claim 15, characterized in that the lower end face of the upper flange (11) has a stop (112) extending towards the piston sleeve (40), the stop (112) being in stop abutment with the first extension (41) to prevent displacement of the piston sleeve (40) in radial direction with respect to the upper flange (11).

18. Pump body assembly according to claim 2, wherein at least two of said structural members further comprise an upper flange (11) above said piston assembly, said pump body assembly 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).

19. A fluid machine comprising a pump body assembly according to any one of claims 1 to 18.

20. A heat exchange device comprising the fluid machine of claim 19.