CN112727736B

CN112727736B - Pump body assembly and fluid machine

Info

Publication number: CN112727736B
Application number: CN202011592480.7A
Authority: CN
Inventors: 杜忠诚; 任丽萍; 宋雪威; 张荣婷; 李直; 张培林
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2020-12-29
Filing date: 2020-12-29
Publication date: 2022-02-11
Anticipated expiration: 2040-12-29
Also published as: CN112727736A

Abstract

The invention provides a pump body assembly and a fluid machine. The pump body assembly comprises a cylinder, and the cylinder is rotatably arranged; the flange structure is located one side of the cylinder and is provided with a positioning boss extending into the cylinder, and a wall hollow concave part is arranged on the positioning boss. The pump body assembly provided by the invention is used for solving the problem that a flange structure obstructs an oil liquid circulation path in the prior art.

Description

Pump body assembly and fluid machine

Technical Field

The invention relates to the technical field related to a rotary cylinder compressor, in particular to a pump body assembly and a fluid machine.

Background

Taking a rotary cylinder compressor as an example, the rotary cylinder compressor is a novel positive displacement compressor. During the operation of the rotary cylinder compressor, the cylinder and the rotating shaft of the pump body assembly of the compressor rotate around respective centers, and the piston simultaneously reciprocates relative to the cylinder and the rotating shaft. The rotating shaft penetrates through an inner hole of the piston, the inner hole of the piston is divided into two cavities by the rotating shaft, the piston achieves periodic enlargement and reduction of the cavities relative to the reciprocating motion of the rotating shaft, and oil in the cavities continuously flows back and forth between the two cavities under the extrusion effect.

At present, a circulation path of a rotary cylinder compressor during oil pressing is two spaces above and below a piston, and a flange structure in a pump body almost fills the path of the lower half part of the circulation path after stretching into a cylinder part, so that oil is seriously hindered from flowing in the circulation path, the circulation path is only half of the original volume, frozen oil cannot be smoothly transferred, the resistance of a rotating shaft is increased, and the power consumption of the compressor is increased.

Therefore, the problem that the flange structure obstructs an oil flow path exists in the conventional rotary cylinder compressor in the use process.

Disclosure of Invention

The invention mainly aims to provide a pump body assembly and a fluid machine, and aims to solve the problem that a flange structure obstructs an oil flow path 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 including a cylinder rotatably provided; the flange structure is located one side of the cylinder and is provided with a positioning boss extending into the cylinder, and a clearance concave part is arranged on the positioning boss.

Further, the positioning boss is concentrically arranged with the center of the flange structure.

Furthermore, the flange structure is also provided with a flange hole penetrating through the positioning boss, the flange hole and the center of the flange structure are eccentrically arranged, the pump body assembly further comprises a rotating shaft, and the rotating shaft penetrates through the cylinder and the flange hole.

Furthermore, the positioning boss is in a step shape and comprises a first section and a second section, the first section is far away from the center of the cylinder relative to the second section, and the orthographic projection of the second section on the first section is not overlapped or is not overlapped completely with the outer periphery of the first section, so that a clearance concave part is formed on the step surface between the outer periphery of the second section and the first section.

Further, the clearance concave part is a crescent concave part or an annular concave part.

Further, when the clearance concave portion is an annular concave portion, an inner annular surface of the annular concave portion is concentrically or eccentrically arranged with an outer annular surface of the annular concave portion.

Furthermore, the flange structure is also provided with a flange hole penetrating through the positioning boss, the flange hole and the center of the flange structure are eccentrically arranged, and the flange hole and the second section are concentrically arranged.

Furthermore, the first section and/or the second section are/is a circular boss, the peripheral surface of the first section is matched with the inner wall surface of the cylinder, and the surface of the second section facing to one side of the center of the cylinder is used as a supporting surface to support the rotating shaft of the pump body assembly.

Further, the depth H of the clearance concave part is 5% -60% of the height H of the flange structure.

Further, the depth H of the clearance concave part is 15% -35% of the height H of the flange structure.

Further, the first section is a circular boss, and the depth h of the clearance concave part is 4% -25% of the diameter of the first section.

Further, the wall thickness D of the second section is 10-80% of the maximum wall thickness D of the first section.

Further, the wall thickness D of the second section is 20-40% of the maximum wall thickness D of the first section.

Furthermore, the first section is also provided with a supporting rib extending towards the center of the cylinder, the height of the supporting rib is not higher than that of the second section, and a clearance concave part is formed between the supporting rib and the second section.

Further, at least one side surface of the support rib is flush with the outer periphery of the first section.

Furthermore, the second section and the support rib are arranged at intervals; or at least a portion of the support rib is connected to the second section.

Further, the flange structure includes the lower flange, and pump body subassembly still includes the pivot, and the pivot has major axis section and minor axis section, and the diameter of major axis section is greater than the diameter of minor axis section to form the pivot holding surface in the interface department of major axis section and minor axis section, the pivot holding surface supports in location boss department, and the minor axis section is worn to establish in the lower flange.

Further, the pump body assembly further comprises a cylinder sleeve, and the cylinder sleeve is provided with a volume cavity; the cylinder is rotatably arranged in the volume cavity, and a piston hole is formed in the cylinder along the radial direction of the cylinder; the piston is arranged in the piston hole in a sliding manner; the piston is penetrated and the piston is driven to reciprocate along the extending direction of the piston hole by the rotating shaft, the cylinder rotates to drive the piston to rotate, the flange structure is located at the axial end of the cylinder sleeve, and at least one part of the rotating shaft penetrates through the flange structure.

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

By applying the technical scheme of the invention, the pump body assembly comprises the cylinder and the flange structure, and the cylinder is rotatably arranged; the flange structure is located one side of cylinder and has the location boss that stretches into the cylinder, is provided with the recess of keeping away on the boss of location.

From the above description, it can be seen that, in the above embodiments of the present invention, the clearance concave portion is provided on the positioning boss, so as to reduce the obstruction of the flange structure to the flow path and reduce the power consumption of the compressor. At present, the flange structure of the existing pump body seriously blocks a path close to one side of the flange structure in a circulation path inside a cylinder and a piston, so that the refrigerant oil cannot be smoothly transferred inside the circulation path, the resistance is increased in the rotation process of a rotating shaft, and the power consumption of a compressor is increased.

Specifically, the positioning boss of the flange structure extends into the cylinder, and the clearance concave part is arranged on the positioning boss, so that the obstruction of the positioning boss on the circulation path in the cylinder is reduced. In the process of rotating the cylinder, oil inside the cylinder flows back and forth inside the cylinder through the circulation path, and when the oil flows to the positioning boss, the oil can flow along the clearance concave part, so that the flowing volume is increased, the running power consumption of the compressor is reduced, and meanwhile, the noise and the vibration of the compressor are reduced.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic view showing the installation relationship of a rotating shaft with a cylinder and a lower flange in the present invention; and

FIG. 2 is a schematic view showing the installation relationship between the rotary shaft and the piston in the present invention;

FIG. 3 shows a top view of FIG. 2;

FIG. 4 is a schematic structural view illustrating the lower flange provided with a hollow-avoiding recess, wherein the hollow-avoiding recess is crescent-shaped and the outer circle of the crescent is concentric with the lower flange;

FIG. 5 shows a cross-sectional view of the clearance recess of FIG. 4;

FIG. 6 shows a structural cross-sectional view of the lower flange of FIG. 4;

FIG. 7 shows an axial cross-sectional view of the shaft, cylinder, lower flange and piston of the present invention taken perpendicular to the direction of piston movement;

FIG. 8 shows an axial cross-sectional view of the shaft, cylinder, lower flange and piston of the present invention in the direction of piston movement;

FIG. 9 is a schematic structural view of the lower flange provided with a hollow-out recess, wherein the hollow-out recess has an irregular shape;

fig. 10 shows a schematic structural diagram of the lower flange provided with the hollow-avoiding concave portion, wherein the hollow-avoiding concave portion is crescent-shaped, and the outer circle of the crescent-shaped concave portion does not coincide with the center of the lower flange.

Wherein the figures include the following reference numerals:

10. a cylinder; 106. a piston bore; 20. a piston; 30. a rotating shaft; 60. a lower flange; 6001. positioning the boss; 6002. a clearance recess; 6003. a flange hole; 6004. a first stage; 6005. a second stage; 6006. and (7) supporting ribs.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

It is noted that, unless otherwise indicated, 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.

In the present invention, unless specified to the contrary, use of the terms of orientation such as "upper, lower, top, bottom" or the like, generally refer to the orientation as shown in the drawings, or to the component itself in a vertical, perpendicular, or gravitational orientation; likewise, for ease of understanding and description, "inner and outer" refer to the inner and outer relative to the profile of the components themselves, but the above directional words are not intended to limit the invention.

In order to solve the problem that the flange structure of the rotary cylinder compressor in the prior art obstructs an oil liquid circulation path in the using process, the application provides a pump body assembly and a fluid machine.

The fluid machine includes a pump body assembly described below. In particular, the fluid machine is a compressor. Further, the compressor is a rotary cylinder compressor.

As shown in fig. 1 to 10, the pump body assembly includes a cylinder 10 and a flange structure, the cylinder 10 being rotatably provided; the flange structure is located on one side of the cylinder 10 and has a positioning boss 6001 extending into the cylinder 10, and a clearance recess 6002 is provided on the positioning boss 6001.

From the above description, it can be seen that, in the above embodiments of the present invention, the clearance recessed portion 6002 is provided on the positioning boss 6001, so as to reduce the obstruction of the flange structure to the flow path, and reduce the power consumption of the compressor. The flange structure of the conventional pump body seriously blocks a path close to the flange structure in the flow paths inside the cylinder 10 and the piston 20, so that the refrigerant oil cannot be smoothly transferred inside the flow paths, the resistance is increased in the rotation process of the rotating shaft 30, and the power consumption of the compressor is increased. Specifically, when the flange structure is the lower flange 60, the flow path near the lower portion of the flow paths is easily blocked.

Specifically, the positioning boss 6001 of the flange structure extends into the cylinder 10, and the clearance recess 6002 is provided in the positioning boss 6001, so that the obstruction of the positioning boss 6001 on the flow path inside the cylinder 10 is reduced. In the process of the rotation of the cylinder 10, oil inside the cylinder 10 flows back and forth inside the cylinder 10 through the circulation path, and when the oil flows to the positioning boss 6001, the oil can flow along the clearance concave part 6002, so that the flow volume is increased, the power consumption of the compressor is reduced, and meanwhile, the noise and the vibration of the compressor are reduced.

As shown in fig. 4-10, the locating boss 6001 is disposed concentrically with the center of the flange structure. Location boss 6001 integrated into one piece is structural at the flange, and the part stretches into cylinder 10 to fix a position cylinder 10 and avoid cylinder 10 to take place the slope at rotatory in-process, the flange structure has bearing capacity simultaneously, when location boss 6001 sets up with the flange structure is concentric, reduce the eccentric force between location boss 6001 and flange structure, increase flange structure and location boss 6001's stability, in order to improve the stability of pump body subassembly operation, also improve flange structure and location boss 6001's life.

As shown in fig. 4 to 10, the flange structure further has a flange hole 6003 penetrating through the positioning boss 6001, the flange hole 6003 is eccentrically disposed with respect to the center of the flange structure, and the pump body assembly further includes a rotating shaft 30, and the rotating shaft 30 penetrates through the cylinder 10 and the flange hole 6003.

Specifically, the pivot 30 passes in piston 20 and cylinder 10 inserts flange hole 6003, flange hole 6003 and location boss 6001 eccentric settings this moment, location boss 6001 has the effect of bearing pivot 30, consequently, eccentric settings's flange hole 6003 can effectively reduce the concentrated stress between location boss 6001 and the flange structure, be favorable to strengthening the life of flange structure, the convenient clearance concave part 6002 of seting up simultaneously on location boss 6001, clearance concave part 6002 has increased the circulation route of fluid, the resistance of fluid to pivot 30 has been reduced, the consumption of pump body subassembly is reduced.

As shown in fig. 4 to 10, the positioning boss 6001 includes a first section 6004 and a second section 6005 in a stepped shape, the first section 6004 is away from the center of the cylinder 10 relative to the second section 6005, the outer peripheral surface of the first section 6004 is fitted to the inner wall surface of the cylinder 10, the surface of the second section 6005 facing the center of the cylinder 10 serves as a supporting surface to support the rotating shaft 30 of the pump body assembly, and the flange hole 6003 penetrates through the first section 6004 and the second section 6005.

Specifically, second section 6005 and first section 6004 cooperation are the echelonment structure, and the peripheral face of first section 6004 and the inside cooperation of cylinder 10 and do not influence the cylinder 10 rotation, and the terminal surface towards cylinder 10 center of second section 6005 supports pivot 30, and flange hole 6003 sets up with second section 6005 is concentric, and first section 6004 and the cooperation of second section 6005 form clearance concave part 6002 to increase the inside circulation route of cylinder 10, reduce the rotation hindrance of pivot 30, reduce the consumption of pump body subassembly.

It is noted that in the embodiment shown in fig. 4-10, the first section 6004 and the second section 6005 are both circular bosses. It is not necessary that the first section 6004 and the second section 6005 be circular bosses at the same time during actual manufacturing. The first section 6004 and the second section 6005 may have circular projections on only one of them, or neither of the first section 6004 and the second section 6005 may have circular projections. The first section 6004 can be fitted into the inner surface of the cylinder 10 without being obstructed, and the second section 6005 can support the shaft 30. Due to the shape and combination of the first section 6004 and the second section 6005, no further embodiments will be described.

The space saving recesses 6002 having various shapes may be formed depending on the position of the second section 6005 with respect to the first section 6004, and the combination of the shapes is not limited to a specific one because the combination of the shapes is relatively large. Different embodiments will be described below according to the shape of the relief recess 6002.

In the specific embodiment shown in fig. 4 to 8, the first section 6004 and the second section 6005 are both circular bosses, the orthographic projection of the second section 6005 on the first section 6004 is not completely overlapped with the outer peripheral edge of the first section 6004, a clearance recess 6002 is formed at a step surface between the outer peripheral edge of the second section 6005 and the first section 6004, at this time, the clearance recess 6002 is a crescent recess, and the outer circle of the crescent is concentric with the flange structure.

Specifically, first section 6004 and second section 6005 are circular bosss, because the outer peripheral edge of second section 6005 and the outer peripheral edge of first section 6004 between step face department forms clearance concave part 6002, when the outer peripheral edge of second section 6005 and the outer peripheral edge of first section 6004 partially coincide, crescent clearance concave part 6002 is formed at the outer peripheral edge of second section 6005 and the outer peripheral edge of first section 6004 between step face department, crescent clearance concave part 6002 has increased the circulation route of fluid, has reduced the hindrance of fluid to spool 30, has reduced the power consumption of pump body subassembly.

As shown in fig. 9, in the specific embodiment, the first section 6004 and the second section 6005 are both circular bosses, the orthographic projection of the second section 6005 on the first section 6004 is not completely overlapped with the outer peripheral edge of the first section 6004, the first section 6004 is further provided with a support rib 6006 extending towards one end of the center of the cylinder 10, the height of the support rib 6006 is not higher than that of the second section 6005, at least one side surface of the support rib 6006 is flush with the outer peripheral edge of the first section 6004, the support rib 6006 and the second section 6005 are arranged at intervals, a clearance recess 6002 is formed between the support rib 6006 and the second section 6005, and the clearance recess 6002 is irregular. In a specific implementation, the height of the support rib 6006 may be generally selected to be the same as the height of the second section 6005.

Specifically, the support rib 6006 is arranged on the first section 6004, the support rib 6006, the first section 6004 and the second section 6005 are matched to form an irregular clearance concave portion 6002, and the clearance concave portion 6002 can enlarge a flow path inside the cylinder 10, reduce the resistance between the rotating shaft 30 and oil, and reduce the power consumption of the pump body assembly. Meanwhile, stability between the positioning boss 6001 and the cylinder 10 can be enhanced by adding the support rib 6006.

Note that the area of the irregular shape is based on an end area not larger than an end of the first section 6004 toward the center of the cylinder 10.

In the specific embodiment shown in fig. 10, the first section 6004 and the second section 6005 are circular bosses, the orthographic projection of the second section 6005 on the first section 6004 is not completely overlapped with the outer peripheral edge of the first section 6004, the first section 6004 is further provided with a support rib 6006 extending towards one end of the center of the cylinder 10, the height of the support rib 6006 is not higher than that of the second section 6005, at least one side surface of the support rib 6006 is flush with the outer peripheral edge of the first section 6004, and at least one part of the support rib 6006 and the second section 6005 are connected, a clearance recess 6002 is formed between the support rib 6006 and the second section 6005, at this time, the clearance recess 6002 is crescent-shaped, and the outer circle of the crescent shape is eccentrically arranged with the flange structure.

Specifically, the support ribs 6006 are added between the second section 6005 and the first section 6004 to enhance the stability between the positioning boss 6001 and the cylinder 10, so as to prevent the cylinder 10 from tilting. Meanwhile, the clearance concave part 6002 formed between the first section 6004, the second section 6005 and the support rib 6006 can enlarge the flow path inside the cylinder 10, reduce the resistance between the rotating shaft 30 and oil, and reduce the power consumption of the pump body assembly.

In one embodiment, not shown, the first section 6004 and the second section 6005 are circular bosses, and the orthographic projection of the second section 6005 on the first section 6004 is completely misaligned with the outer periphery of the first section 6004, so that a clearance recess 6002 is formed at the step surface between the outer periphery of the second section 6005 and the first section 6004, and the clearance recess 6002 is an annular recess.

Specifically, the outer peripheries of the first section 6004 and the second section 6005 are not overlapped, an annular clearance recess 6002 is formed at the stepped surface between the outer periphery of the second section 6005 and the first section 6004, and the annular clearance recess 6002 can enlarge the flow path, reduce the obstruction of the flange structure to the flow path, and reduce the power consumption of the pump assembly.

When the clearance recessed portion 6002 is an annular recessed portion, the inner annular surface and the outer annular surface of the annular recessed portion may be disposed concentrically or eccentrically. When the inner ring surface and the outer ring surface are concentrically arranged or eccentrically arranged, the same technical effect can be achieved, namely, the annular clearance concave part 6002 can enlarge a flow path and reduce the obstruction of oil to the rotating shaft 30. Therefore, the concentric or eccentric arrangement of the inner and outer annular surfaces is not separately described herein.

As shown in fig. 6, the depth h of the relief recess 6002 is 4% -25% of the diameter of the first section 6004. Specifically, the depth of the clearance recess 6002 is limited by the diameter of the first section 6004, so that the excessive depth of the clearance recess 6002 is prevented from affecting the stability of the fitting of the positioning boss 6001 and the flange structure with the rotating shaft 30 and the cylinder 10. When the depth h of the clearance recess 6002 is 4% -25% of the diameter of the first section 6004, the clearance recess 6002 can increase the flow path of the oil, reduce the rotational resistance of the rotating shaft 30, reduce power consumption, and do not affect the stability of the operation of the pump body assembly.

As shown in fig. 6, the wall thickness D of the second section 6005 is 10% -80% of the maximum wall thickness D of the first section 6004. Because second section 6005 and flange structure eccentric settings, first section 6004 and flange structure concentric setting, consequently second section 6005 and first section 6004 eccentric settings. It should be noted that when the wall thickness of the second section 6005 is 10% -80% of the maximum wall thickness of the first section 6004, the eccentricity ratio of the second section 6005 with respect to the first section 6004 is fixed, and does not change with the change of the ratio of the wall thickness of the first section 6004 to the maximum wall thickness of the second section 6005, and the wall thickness of the second section 6005 is fixed, the wall thickness of the first section 6004 can be changed, and the effect of expanding the flow path is achieved by providing the clearance concave portion 6002 on the stepped surface between the second section 6005 and the first section 6004, so as to reduce the power consumption of the pump body.

Further, the wall thickness D of the second section 6005 is 20% -40% of the maximum wall thickness D of the first section 6004. Specifically, by further limiting the wall thickness D of the second section 6005 and the maximum wall thickness D of the first section 6004, it can be seen that when the wall thickness D of the second section 6005 is 20% to 40% of the maximum wall thickness D of the first section 6004, the oil is best circulated in the circulation path, the resistance of the rotating shaft 30 by the oil is minimum, and the power consumption of the pump body assembly is minimum.

As shown in fig. 6, the depth H of the relief recess 6002 is 5% to 60% of the height H of the flange structure. Specifically, when the depth H of the clearance concave portion 6002 is less than 5% -60% of the height H of the flange structure, the depth of the clearance concave portion 6002 on the positioning boss 6001 is too small, the first section 6004 of the positioning boss 6001 blocks the flow of oil in the flow path, and the oil blocks the rotation of the rotating shaft 30, so that the power consumption of the pump body assembly is increased. When the depth H of the clearance concave portion 6002 is greater than 5% -60% of the height H of the flange structure, the depth of the clearance concave portion 6002 on the positioning boss 6001 is too large, so that the strength of the positioning boss 6001 is reduced, the stability is reduced in the operation process of the pump body assembly, and the problem of the deviation of the rotating shaft 30 and the cylinder 10 is likely to occur.

Further, the depth H of the clearance recess 6002 is 15% -35% of the height H of the flange structure. Specifically, the depth H of the clearance recess 6002 is 15% -35% of the height H of the flange structure, which further limits that the depth H of the clearance recess 6002 is 5% -60% of the height H of the flange structure, and when the depth H of the clearance recess 6002 is 15% -35% of the height H of the flange structure, the clearance recess 6002 can effectively enlarge the flow path of the oil, reduce the obstruction of the oil on the rotating shaft 30 in the rotating process of the rotating shaft 30, and reduce the power consumption of the pump body assembly.

The flange structure of the present invention includes a lower flange 60, the shaft 30 has a long shaft section and a short shaft section, the diameter of the long shaft section is larger than that of the short shaft section to form a shaft supporting surface at the interface of the long shaft section and the short shaft section, the shaft supporting surface is supported at the positioning boss 6001, and the short shaft section is inserted into the lower flange 60.

Specifically, the second section 6005 of the positioning boss 6001 on the lower flange 60 supports the rotating shaft supporting surface of the rotating shaft 30, and during the rotation of the rotating shaft 30, the clearance concave portion 6002 on the lower flange 60 enlarges the flow path of the oil inside the cylinder 10, so that the obstruction of the oil on the rotating shaft 30 is reduced, and the power consumption is reduced.

The pump body assembly further comprises a cylinder sleeve, the cylinder sleeve is provided with a volume cavity, the cylinder 10 is rotatably arranged in the volume cavity, a piston hole 106 is formed in the cylinder 10 along the radial direction of the cylinder, the piston 20 is slidably arranged in the piston hole 106, the rotating shaft 30 penetrates through the piston 20 and drives the piston 20 to reciprocate along the extending direction of the piston hole 106, the cylinder 10 rotates to drive the piston 20 to rotate, the flange structure is located at the axial end of the cylinder sleeve, and at least one part of the rotating shaft 30 penetrates through the flange structure.

Specifically, the cylinder 10 rotates in the cylinder liner in synchronization with the rotation shaft 30, and the piston 20 reciprocates inside the piston hole 106. Relative motion between the piston 20 and the rotating shaft 30 realizes the transfer of oil in two circulation paths formed by matching the cylinder 10, the piston 20 and the rotating shaft 30, the two circulation paths are periodically enlarged and reduced along with the reciprocating motion of the piston 20 so as to drive the transfer of the oil, and the positioning boss 6001 of the lower flange 60 is provided with the clearance concave part 6002, so that the obstruction of the positioning boss 6001 on the flow of the oil in the circulation path can be reduced, the resistance between the rotating shaft 30 and the oil is reduced, and the power consumption of the pump body assembly is reduced.

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

the positioning boss 6001 is provided with a clearance recess 6002, so that the obstruction of the flange structure to the flow path is reduced, and the power consumption of the compressor is reduced. The flange structure of the conventional pump body seriously blocks the lower part of the flow path inside the cylinder 10 and the piston 20, so that the refrigerant oil cannot be smoothly transferred inside the flow path, the resistance is increased during the rotation of the rotating shaft 30, and the power consumption of the compressor is increased.

It is to be understood that the above-described embodiments are only a few, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection 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 according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of 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 this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement 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:

a cylinder (10), the cylinder (10) being rotatably disposed;

the flange structure, the flange structure is located one side of cylinder (10) and has and stretch into location boss (6001) of cylinder (10), be provided with on location boss (6001) and keep away empty concave part (6002), location boss (6001) are the echelonment and include first section (6004) and second section (6005), first section (6004) for second section (6005) keep away from the center of cylinder (10), the orthographic projection of second section (6005) on first section (6004) with the outer peripheral edge of first section (6004) is totally noncoincidence or incompletely coincide to make the outer peripheral edge of second section (6005) and the step face department between first section (6004) form keep away empty concave part (6002).

2. The pump body assembly according to claim 1, wherein the locating boss (6001) is disposed concentrically with the center of the flange structure.

3. The pump body assembly according to claim 1, wherein the flange structure further has a flange hole (6003) penetrating the positioning boss (6001), the flange hole (6003) being disposed eccentrically from a center of the flange structure, the pump body assembly further comprising a rotary shaft (30), the rotary shaft (30) passing through the cylinder (10) and the flange hole (6003).

4. The pump body assembly according to claim 1, wherein the clearance recess (6002) is a crescent-shaped recess or an annular recess.

5. The pump body assembly according to claim 4, wherein when the clearance recess (6002) is an annular recess, an inner annular surface of the annular recess is concentrically or eccentrically disposed from an outer annular surface of the annular recess.

6. The pump body assembly according to claim 1, wherein the flange structure further has a flange hole (6003) extending through the positioning boss (6001), the flange hole (6003) being disposed off-center from a center of the flange structure, the flange hole (6003) being disposed concentrically with the second section (6005).

7. The pump block assembly according to claim 1, wherein the first section (6004) and/or the second section (6005) are circular bosses, the outer circumferential surface of the first section (6004) is fitted to the inner wall surface of the cylinder (10), and the surface of the second section (6005) facing the center of the cylinder (10) serves as a support surface to support the rotating shaft (30) of the pump block assembly.

8. The pump body assembly according to claim 1, characterized in that the depth H of the clearance recess (6002) is 5-60% of the height H of the flange structure.

9. The pump body assembly according to claim 8, characterized in that the depth H of the clearance recess (6002) is 15-35% of the height H of the flange structure.

10. The pump body assembly according to claim 1, characterized in that said first section (6004) is a circular boss, said relief recess (6002) having a depth h comprised between 4% and 25% of the diameter of said first section (6004).

11. The pump body assembly according to claim 1, characterized in that the wall thickness D of the second section (6005) is 10% -80% of the maximum wall thickness D of the first section (6004).

12. The pump body assembly according to claim 11, characterized in that the wall thickness D of the second section (6005) is 20-40% of the maximum wall thickness D of the first section (6004).

13. The pump body assembly according to claim 1, characterized in that the first section (6004) further has a support rib (6006) projecting toward the center of the cylinder (10), the support rib (6006) has a height no higher than the second section (6005), and the clearance recess (6002) is formed between the support rib (6006) and the second section (6005).

14. The pump body assembly according to claim 13, wherein at least one side surface of the support rib (6006) is flush with an outer periphery of the first section (6004).

15. The pump body assembly according to claim 13,

the second section (6005) and the support rib (6006) are arranged at intervals; or

At least a portion of the support rib (6006) is connected to the second section (6005).

16. The pump block assembly according to claim 1, wherein the flange structure includes a lower flange (60), the pump block assembly further comprising a spindle (30), the spindle (30) having a long shaft section and a short shaft section, the long shaft section having a diameter larger than a diameter of the short shaft section to form a spindle bearing surface at an interface of the long shaft section and the short shaft section, the spindle bearing surface being supported at the positioning boss (6001), the short shaft section being inserted into the lower flange (60).

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

a cylinder liner having a volume chamber;

the cylinder (10) is rotatably arranged in the volume cavity, and a piston hole (106) is formed in the cylinder (10) along the radial direction of the cylinder;

a piston (20), the piston (20) slidably disposed within the piston bore (106);

the rotating shaft (30) penetrates through the piston (20) and drives the piston (20) to reciprocate along the extending direction of the piston hole (106), the cylinder (10) rotates to drive the piston (20) to rotate, the flange structure is located at the axial end of the cylinder sleeve, and at least one part of the rotating shaft (30) penetrates through the flange structure.

18. A fluid machine, characterized by comprising a pump body assembly according to any one of claims 1 to 17.