CN112524033A

CN112524033A - Flange structure, pump body assembly and fluid machine

Info

Publication number: CN112524033A
Application number: CN202011592329.3A
Authority: CN
Inventors: 任丽萍; 杜忠诚; 于瑞波; 李直; 张培林; 宋雪威
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: 2021-03-19
Anticipated expiration: 2040-12-29
Also published as: CN112524033B

Abstract

The invention provides a flange structure, a pump body assembly and a fluid machine. The amortization recess has been seted up towards one side of cylinder jacket to the flange structure, and the amortization recess extends and end to end non-communicating along the circumference of flange structure to form between the end to end at the amortization recess and block the structure, the flange structure still includes the flange exhaust hole, the flange exhaust hole just is located the one end of amortization recess with amortization recess intercommunication. The invention can solve the problem that the flange structure in the prior art does not have a silencing function.

Description

Flange structure, pump body assembly and fluid machine

Technical Field

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

Background

Use the revolving cylinder compressor as an example, the pump body subassembly of present compressor is for reaching the effect of noise reduction, and the outside that will go up the flange sets up extra muffler usually, goes up the flange and only provides the exhaust hole, guarantees that the gas in the cylinder can be smooth outwards flow through last flange to carry out the amortization in the muffler.

The pump body assembly of structure like this, the structure is comparatively complicated, and goes up the effect singleness of flange, can't realize the function of amortization.

From the above, in the operation process of the existing rotary cylinder compressor, the flange structure does not have the noise reduction function.

Disclosure of Invention

The invention mainly aims to provide a flange structure, a pump body assembly and a fluid machine, and aims to solve the problem that the flange structure in the prior art does not have a sound attenuation function.

In order to achieve the above object, according to one aspect of the present invention, a flange structure is provided, where a silencing groove is formed on one side of the flange structure facing a cylinder liner, the silencing groove extends along a circumferential direction of the flange structure and is not communicated end to end so as to form a blocking structure between the end and the end of the silencing groove, and the flange structure further includes a flange exhaust hole, the flange exhaust hole is communicated with the silencing groove and is located at one end of the silencing groove.

Furthermore, the lateral wall of amortization recess has the rib structure of the center pin salient to the flange structure, and the rib structure is a plurality of, and a plurality of rib structures set up along the lateral wall interval of amortization recess to make the amortization recess have the width that sets up in turn and flow through regional and the narrow region that flows through.

Further, the number of the rib-shaped structures is more than 1 and less than 5.

Further, the number of the rib-shaped structures is 3.

Further, the distance between each rib structure and the central axis of the flange structure is equal.

Furthermore, the thickness D1 of the blocking structure and the thickness G1 of the side wall of the flange structure meet the condition that G1 is not less than D1 is not less than 6G 1.

Furthermore, the blocking structure is provided with a first blocking surface and a second blocking surface which extend along the radial direction of the flange structure in the silencing groove, a diameter passing through a central shaft of the flange structure is used as a datum line, a first included angle alpha is formed between the datum line and the first blocking surface in the circumferential direction of the flange structure, and a second included angle beta is formed between the datum line and the second blocking surface in the circumferential direction of the flange structure, so that the included angle between the first blocking surface and the second blocking surface in the circumferential direction of the flange structure is beta-alpha.

Further, the flange structure is an upper flange.

According to another aspect of the present invention, a pump body assembly is provided that includes a flange structure.

Further, the pump body assembly also comprises a rotating shaft; the limiting plate is provided with a limiting plate exhaust hole; the cylinder jacket, the cylinder jacket has the cylinder jacket exhaust hole, and flange structure, limiting plate and cylinder jacket are passed in proper order to the pivot, and cylinder jacket exhaust hole, limiting plate exhaust hole and flange structure's amortization recess intercommunication.

Further, the limiting plate exhaust holes and the flange exhaust holes of the flange structure are arranged at intervals in the circumferential direction of the flange structure.

Furthermore, the limiting plate exhaust hole and the flange exhaust hole are respectively located at two ends of the silencing groove of the flange structure and located at two sides of the blocking structure.

Further, the limiting plate exhaust hole and the flange exhaust hole are located on the same side of the blocking structure.

Further, the limiting plate exhaust hole is a plurality of, and a plurality of limiting plate exhaust holes interval sets up.

Further, the sizes of the at least two limiting plate exhaust holes are different.

Furthermore, the two limiting plate exhaust holes comprise large holes and small holes with different apertures, and the angles of the small holes and the flange exhaust holes in the circumferential direction of the flange structure are larger than 30 degrees and smaller than 200 degrees.

Furthermore, the two exhaust holes of the limiting plate comprise large holes and small holes with different apertures, and the large holes are close to the blocking structure of the flange structure relative to the small holes.

Further, the cylinder jacket exhaust hole is a plurality of, and the cylinder jacket has a plurality of middle chambeies, and each middle chamber all communicates through the volume chamber of the cylinder jacket exhaust hole that corresponds and cylinder jacket, and the cylinder jacket still has a plurality of cylinder jacket intercommunicating pores with each middle chamber intercommunication, and a plurality of cylinder jacket intercommunicating pores set up with a plurality of limiting plate exhaust hole one-to-one.

Further, at least two of the plurality of cylinder liner exhaust holes are different in size; and/or the intermediate cavities are not communicated with each other; and/or at least two of the plurality of cylinder liner communication holes are different in size.

Further, the cylinder liner has volume chamber pump body subassembly still includes: 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, the piston has the sliding hole, and at least a part of pivot wears to establish in the sliding hole, and the piston is along with the pivoted in-process of pivot rotation, and the piston slides in the piston hole for the pivot, and the cylinder synchronous revolution.

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, one side of the flange structure, which faces to the cylinder sleeve, is provided with the silencing groove, the silencing groove extends along the circumferential direction of the flange structure and is not communicated end to end so as to form a blocking structure between the end and the tail of the silencing groove, and the flange structure further comprises a flange exhaust hole, and the flange exhaust hole is communicated with the silencing groove and is positioned at one end of the silencing groove.

From the above description, it can be seen that, in the above embodiments of the present invention, the silencing groove is formed on one side of the flange structure, so as to increase the flow path of the high-pressure gas, reduce noise, increase the rigidity of the flange structure, and improve the stability of the flange structure. Through with flange structure and muffler integrated design, at the in-process of the pump body subassembly actual operation of commentaries on classics jar compressor, the high-pressure gas that gets into in the amortization recess can be discharged through the flange exhaust hole after the amortization route of amortization recess planning of flowing through to accomplish the process of amortization and exhaust integration.

Specifically, the flange exhaust hole on the flange structure is communicated with the silencing groove and is positioned at one end of the silencing groove. Further, the silencing groove extends along the circumferential direction of the flange structure and is not communicated end to end, so that a blocking structure is formed between the end and the end of the silencing groove. Inside gas entered into the amortization recess through the flange structure, set up in the amortization recess and block the circulating route of structure multiplicable gas in the amortization recess inside, gas is discharged from the flange exhaust hole of amortization recess after the throttle expansion in the circulating route, effective noise abatement. And meanwhile, the blocking structure has a good supporting effect, the rigidity of the flange structure is enhanced, and the flange structure is more stable in the operation process of the pump body assembly.

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 shows a cross-sectional view of the assembled components of the pump block assembly of the present invention; and

fig. 2 shows a schematic view of the cylinder liner of the present invention;

FIG. 3 is a structural diagram of the flange structure of the present invention with a sound damping groove, wherein the exhaust holes of the limiting plate and the exhaust holes of the flange are respectively located at two sides of the blocking structure;

FIG. 4 is a schematic view of the structure of the flange of the present invention with sound damping grooves formed therein, wherein the exhaust holes of the limiting plate and the exhaust holes of the flange are located on the same side of the blocking structure;

fig. 5 shows a schematic structural view of a limiting plate of the invention;

fig. 6 shows a structure diagram of the flange structure provided with the sound attenuation grooves, wherein the limiting plate exhaust holes and the flange exhaust holes are positioned at two sides of the blocking structure, and the blocking structure is thicker than that in fig. 3.

Wherein the figures include the following reference numerals:

20. a piston; 30. a rotating shaft; 40. a cylinder liner; 4011. a cylinder liner communication hole; 4012. a cylinder sleeve exhaust hole; 4013. a middle cavity; 50. an upper flange; 5011. a flange vent hole; 5021. a blocking structure; 5031. a silencing groove; 70. an upper limiting plate; 7011. and a limiting plate exhaust hole.

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.

The invention provides a flange structure, a pump body assembly and a fluid machine, and aims to solve the problem that the flange structure does not have a noise reduction function in the operation process of a rotary cylinder compressor in the prior art.

The fluid machine includes a pump body assembly described below, in which a flange structure described below is a part of the 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. 3 to 4, a noise-reducing groove 5031 is formed on one side of the flange structure facing the cylinder liner 40, the noise-reducing groove 5031 extends along the circumferential direction of the flange structure and is not communicated end to end so as to form a blocking structure 5021 between the end and the end of the noise-reducing groove 5031, the flange structure further includes a flange exhaust hole 5011, and the flange exhaust hole 5011 is communicated with the noise-reducing groove 5031 and is located at one end of the noise-reducing groove 5031.

The noise reduction groove 5031 is formed in one side of the flange structure, so that the flow path of high-pressure gas is increased, noise is reduced, the rigidity of the flange structure is increased, and the stability of the flange structure is improved. Through with flange structure and muffler integrated design, at the in-process of the pump body subassembly actual operation of commentaries on classics jar compressor, the high-pressure gas that gets into in the amortization recess can be discharged through the flange exhaust hole after the amortization route of amortization recess planning of flowing through to accomplish the process of amortization and exhaust integration.

Specifically, a noise-reduction groove 5031 is formed at one side of the flange structure, and a flange exhaust hole 5011 in the flange structure is communicated with the noise-reduction groove 5031 and is located at one end of the noise-reduction groove 5031. Further, the muffling groove 5031 extends in the circumferential direction of the flange structure and is not communicated end to end, so that a blocking structure 5021 is formed between the end and the end of the muffling groove 5031. The gas enters the silencing groove 5031 through the flange structure, and the blocking structure 5021 is arranged in the silencing groove 5031 to enable the gas to flow in one direction in the silencing groove 5031, so that the flow path of the gas in the silencing groove 5031 can be increased, and the gas is throttled and expanded in the flow path and then is discharged from the flange vent hole 5011 of the silencing groove 5031, so that the noise is effectively reduced. Simultaneously, the blocking structure 5021 has a good supporting effect, the rigidity of the flange structure is enhanced, and the flange structure is more stable in the operation process of the pump body assembly.

As shown in fig. 3 to 4, the side wall of the noise-reducing groove 5031 has a plurality of rib-like structures protruding toward the central axis of the flange structure, and the plurality of rib-like structures are arranged at intervals along the side wall of the noise-reducing groove 5031, so that the noise-reducing groove 5031 has alternately arranged wide flow areas and narrow flow areas.

Specifically, the noise-canceling recess 5031 is internally formed with wide and narrow flow-passing regions alternately arranged by a plurality of rib-like structures provided at intervals on the side wall of the noise-canceling recess 5031. When the gas flows into the silencing groove 5031, the gas is throttled and expanded for multiple times when passing through a plurality of wide flow passing regions and narrow flow passing regions arranged at intervals, so as to reduce noise.

In the present invention, the number of the rib-like structures is more than 1 and less than 5. The plurality of ribs form the muffling grooves 5031 with wide flow areas and narrow flow areas alternately arranged to increase the throttling and expanding times, and it should be noted that the throttling and expanding times are not as many as possible, and when the number of ribs is greater than 1 and less than 5, the muffling function is achieved. In this embodiment, the number of rib-like structures is 3.

As shown in fig. 3 to 4, the distance between the central axes of the rib structures and the flange structure is equal. The plurality of rib structures are disposed inside the noise reduction groove 5031 with the central axis of the flange structure as the center, and are equidistant from the central axis of the flange structure, so as to enhance the noise reduction effect. Of course, not all of the ribs need be equidistant from the central axis of the flange structure. The distance between the central axes of different rib-shaped structures and flange structures can be partially different or totally different, and the distances are not listed, and the distances between the central axes of the rib-shaped structures and the flange structures are reasonably set on the basis of realizing the silencing function.

As shown in FIGS. 3 to 4, G1 is equal to or more than D1 is equal to or more than 6G1 is satisfied between the thickness D1 of the blocking structure 5021 and the thickness G1 of the side wall of the flange structure. The thickness D1 of the blocking structure 5021 has the effect of strengthening the structural rigidity of the flange.

Specifically, when the thickness D1 of the blocking structure 5021 is smaller than G1, the too small thickness D1 of the blocking structure 5021 affects the rigidity of the flange structure, resulting in a problem that the flange structure is easily deformed. When the thickness D1 of the blocking structure 5021 is greater than 6G1, the excessively large blocking structure 5021 affects the length of the noise-reduction groove 5031, so that the flow path of the gas is shortened, and the noise reduction effect is affected.

Therefore, the noise reduction effect can be ensured by reasonably controlling the thickness D1 of the blocking structure 5021. The thickness D1 of the blocking structure 5021 is relatively small in the particular embodiment shown in fig. 3; the thickness D1 of the blocking structure 5021 is relatively thick in the particular embodiment shown in fig. 6.

As shown in fig. 3 to 4, the blocking structure 5021 has a first blocking surface and a second blocking surface extending in the radial direction of the flange structure in the noise reduction groove 5031, and the reference line has a first included angle α with the first blocking surface in the circumferential direction of the flange structure and a second included angle β with the second blocking surface in the circumferential direction of the flange structure, with a diameter passing through the central axis of the flange structure as a reference line, so that the included angle between the first blocking surface and the second blocking surface in the circumferential direction of the flange structure is β - α.

Specifically, the angle of the blocking structure 5021 is set between α and β, and the angle of the blocking structure 5021 is smaller than α or larger than β, which may affect the sealing performance of the flange structure, thereby risking gas leakage.

The flange structure of the present invention is the upper flange 50.

As shown in fig. 1 to 2, the pump body assembly further includes a rotating shaft 30, a limiting plate and a cylinder liner 40, the limiting plate has a limiting plate exhaust hole 7011, the cylinder liner 40 has a cylinder liner exhaust hole 4012, the rotating shaft 30 sequentially passes through the flange structure, the limiting plate and the cylinder liner 40, and the cylinder liner exhaust hole 4012, the limiting plate exhaust hole 7011 and the noise reduction groove 5031 of the flange structure are communicated. The limiting plate is an upper limiting plate 70.

Of course, if the pump body assembly of design is when lower exhaust structure, the flange structure can be lower flange, and the limiting plate can be lower limiting plate.

Specifically, the gas flows through the cylinder liner exhaust holes 4012 and the limiting plate exhaust holes 7011 in sequence, enters the noise reduction groove 5031 of the flange structure, is subjected to multiple throttling expansions in the noise reduction groove 5031 to achieve the noise reduction and reduction effects, and is then discharged through the flange exhaust hole 5011.

As shown in fig. 3 to 5, the limit plate exhaust hole 7011 and the flange exhaust hole 5011 of the flange structure are provided at an interval in the circumferential direction of the flange structure. In the figure, the exhaust hole 7011 of the limiting plate is staggered with the exhaust hole 5011 of the flange structure, so that the high-pressure gas entering from the exhaust hole 7011 of the limiting plate cannot be directly exhausted from the exhaust hole 5011 of the flange structure, but flows for a certain distance inside the silencing groove 5031, and then is subjected to multiple throttling expansion in the silencing groove 5031 to achieve the effects of noise reduction and silencing, and then is exhausted from the exhaust hole 5011 of the flange structure.

It should be noted that, in the embodiment shown in fig. 3 to fig. 4, the sound-deadening groove 5031 of the flange structure has a plurality of different structures according to the different positions and angles of the blocking structures 5021, and since the blocking structures 5021 may be at a plurality of different angles, or may be disposed at any position of the sound-deadening groove 5031, specific embodiments of combinations of different positions and angles of the blocking structures 5021 are not listed. Hereinafter, different embodiments are provided according to the distribution positions of the limit plate exhaust holes 7011 and the flange exhaust holes 5011.

In the embodiment shown in fig. 3, the limiting plate exhaust hole 7011 and the flange exhaust hole 5011 are respectively located at both ends of the noise-reduction groove 5031 of the flange structure and at both sides of the blocking structure 5021.

Specifically, the limiting plate exhaust hole 7011 and the flange exhaust hole 5011 are respectively located at both sides of the blocking structure 5021, and when gas flows through the limiting plate exhaust hole 7011 into the interior of the noise cancellation groove 5031, the gas flows from one end of the noise cancellation groove 5031 to the other end of the noise cancellation groove 5031 and is then exhausted through the flange exhaust hole 5011. At this time, the gas may be throttled and expanded several times inside the muffling groove 5031 to reduce noise and muffle sound.

In the embodiment shown in fig. 4, the limiting plate exhaust hole 7011 and the flange exhaust hole 5011 are respectively located at both ends of the sound-deadening groove 5031 of the flange structure and at the same side of the blocking structure 5021. At this time, the gas is required to flow out through the flange exhaust hole 5011 after being throttled and expanded in the silencing groove 5031. Figure 4 provides a shorter length of the flow path than in figure 3.

As shown in fig. 3 and 5, there are a plurality of the limiting plate exhaust holes 7011, and at least two of the limiting plate exhaust holes 7011 have different sizes. The plurality of limiting plate exhaust holes 7011 are provided at intervals. The plurality of limiting plate exhaust holes 7011 may be provided to discharge gas into the silencing groove 5031, so as to avoid excessively concentrating the plurality of limiting plate exhaust holes 7011 at intervals.

As shown in fig. 3 and 5, the two stopper plate exhaust holes 7011 include large holes and small holes having different diameters. The angle between the small hole and the flange exhaust hole 5011 in the circumferential direction of the flange structure is larger than 30 degrees and smaller than 200 degrees, and meanwhile, the large hole is close to the blocking structure 5021 of the flange structure relative to the small hole, so that the noise reduction and silencing effect is enhanced.

As shown in fig. 1 to 2, in the present invention, a plurality of cylinder liner exhaust holes 4012 are provided, the cylinder liner 40 has a plurality of intermediate chambers 4013, each intermediate chamber 4013 communicates with a volume chamber of the cylinder liner 40 through a corresponding cylinder liner exhaust hole 4012, the cylinder liner 40 further has a plurality of cylinder liner communication holes 4011 communicating with each intermediate chamber 4013, and the plurality of cylinder liner communication holes 4011 are provided in one-to-one correspondence with the plurality of stopper plate exhaust holes 7011.

Specifically, a plurality of cylinder liner exhaust holes 4012 and a plurality of intermediate chambers 4013 are provided inside the cylinder liner 40, the plurality of cylinder liner exhaust holes 4012 can increase exhaust efficiency, the plurality of cylinder liner exhaust holes 4012 discharge gas inside the volume chamber into the intermediate chamber 4013, the intermediate chamber 4013 has a buffering effect, and then the gas inside the intermediate chamber 4013 is discharged into the silencing groove 5031 through the plurality of cylinder liner communication holes 4011 and the plurality of stopper plate exhaust holes 7011 in sequence. The plurality of cylinder liner exhaust holes 4012 expedites the discharge of gases, while the plurality of intermediate chambers 4013 function as a buffer gas.

Further, at least two of the cylinder liner exhaust holes 4012 of the plurality of cylinder liner exhaust holes 4012 are different sizes. The intermediate chambers 4013 do not communicate with each other. At least two of the cylinder liner communication holes 4011 of the plurality of cylinder liner communication holes 4011 are different in size.

In the embodiment shown in fig. 2, there are two cylinder liner exhaust ports 4012, and one larger and one smaller cylinder liner exhaust port 4012 may also be a pressure relief port. Since the cylinder liner communication holes 4011 need to correspond one-to-one to the stopper plate exhaust holes 7011, the two cylinder liner communication holes 4011 are also large and small.

Of course, the two intermediate chambers 4013 can be connected to each other, so that the flow path of the gas can be increased, and the gas can be properly arranged according to the requirement.

As shown in fig. 1, in the present invention, the pump body assembly further includes a cylinder and a piston 20, the cylinder is rotatably disposed in the volume cavity of the cylinder sleeve 40, a piston hole is radially opened on the cylinder, the piston 20 has a sliding hole, at least a portion of the rotating shaft 30 is inserted into the sliding hole, during the rotation of the piston 20 along with the rotating shaft 30, the piston 20 slides in the piston hole relative to the rotating shaft 30, and the cylinder rotates synchronously.

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

Specifically, a noise-reduction groove 5031 is formed at one side of the flange structure, and a flange exhaust hole 5011 in the flange structure is communicated with the noise-reduction groove 5031 and is located at one end of the noise-reduction groove 5031. Further, the muffling groove 5031 extends in the circumferential direction of the flange structure and is not communicated end to end, so that a blocking structure 5021 is formed between the end and the end of the muffling groove 5031. The gas enters the silencing groove 5031 through the flange structure, the blocking structure 5021 arranged in the silencing groove 5031 can increase the flow path of the gas in the silencing groove 5031, and the gas is throttled and expanded in the flow path and then is discharged from the flange vent 5011 of the silencing groove 5031, so that the noise is effectively reduced. Simultaneously, the blocking structure 5021 has a good supporting effect, the rigidity of the flange structure is enhanced, and the flange structure is more stable in the operation process of the pump body assembly.

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. The flange structure is characterized in that one side, facing a cylinder sleeve (40), of the flange structure is provided with a noise reduction groove (5031), the noise reduction groove (5031) extends in the circumferential direction of the flange structure and is not communicated end to end, so that a blocking structure (5021) is formed between the end and the end of the noise reduction groove (5031), the flange structure further comprises a flange exhaust hole (5011), and the flange exhaust hole (5011) is communicated with the noise reduction groove (5031) and is located at one end of the noise reduction groove (5031).

2. The flange structure according to claim 1, wherein the side wall of the noise-damping groove (5031) has a plurality of rib-like structures protruding toward the central axis of the flange structure, and the plurality of rib-like structures are arranged at intervals along the side wall of the noise-damping groove (5031) so that the noise-damping groove (5031) has alternately arranged wide and narrow flow-through regions.

3. A flange structure according to claim 2, characterized in that the number of said rib-like structures is more than 1 and less than 5.

4. A flange structure according to claim 3, characterized in that the number of said rib-like structures is 3.

5. A flange structure according to claim 2, wherein the distance between each web structure and the central axis of the flange structure is equal.

6. The flange structure according to claim 1, characterized in that a thickness D1 of the blocking structure (5021) and a side wall thickness G1 of the flange structure satisfy G1 ≦ D1 ≦ 6G 1.

7. The flange structure according to claim 1, wherein the blocking structure (5021) has a first blocking surface and a second blocking surface extending in a radial direction of the flange structure in the noise cancellation groove (5031), and a diameter passing through a central axis of the flange structure is used as a reference line, the reference line has a first included angle α with the first blocking surface in a circumferential direction of the flange structure, and the reference line has a second included angle β with the second blocking surface in the circumferential direction of the flange structure, so that an included angle of the first blocking surface and the second blocking surface in the circumferential direction of the flange structure is β - α.

8. A flange structure according to any one of claims 1-7, characterized in that the flange structure is an upper flange (50).

9. A pump body assembly, characterized by comprising a flange structure according to any one of claims 1 to 8.

10. The pump body assembly of claim 9, further comprising:

a rotating shaft (30);

a limiting plate having a limiting plate vent (7011);

cylinder jacket (40), cylinder jacket (40) have cylinder jacket exhaust hole (4012), pivot (30) pass in proper order the flange structure the limiting plate with cylinder jacket (40), cylinder jacket exhaust hole (4012) limiting plate exhaust hole (7011) with amortization recess (5031) intercommunication of flange structure.

11. The pump body assembly according to claim 10, wherein the limit plate vent hole (7011) is spaced from the flange vent hole (5011) of the flange structure in a circumferential direction of the flange structure.

12. The pump body assembly according to claim 11, characterized in that the limit plate vent hole (7011) and the flange vent hole (5011) are respectively located at both ends of the noise-deadening groove (5031) of the flange structure and at both sides of the blocking structure (5021).

13. The pump body assembly according to claim 11, characterized in that the limit plate vent (7011) and the flange vent (5011) are located on the same side of the blocking structure (5021).

14. The pump body assembly according to claim 11, wherein the stopper plate vent hole (7011) is provided in plurality, and the plurality of stopper plate vent holes (7011) are provided at intervals.

15. The pump body assembly according to claim 14, wherein at least two of the limit plate vent holes (7011) are of different sizes.

16. The pump body assembly according to claim 14, wherein the limit plate vent hole (7011) is two and includes a large hole and a small hole having different hole diameters, the small hole being angled more than 30 degrees and less than 200 degrees from the flange vent hole (5011) in a circumferential direction of the flange structure.

17. The pump body assembly according to claim 14, characterized in that the limit plate vent holes (7011) are two and comprise a large hole and a small hole with different diameters, the large hole being close to the blocking structure (5021) of the flange structure with respect to the small hole.

18. The pump body assembly according to claim 14, wherein the cylinder liner exhaust hole (4012) is plural, the cylinder liner (40) has a plurality of intermediate chambers (4013), each of the intermediate chambers (4013) communicates with the volume chamber of the cylinder liner (40) through the corresponding cylinder liner exhaust hole (4012), the cylinder liner (40) further has a plurality of cylinder liner communication holes (4011) communicating with each of the intermediate chambers (4013), and the plurality of cylinder liner communication holes (4011) are provided in one-to-one correspondence with the plurality of stopper plate exhaust holes (7011).

19. The pump body assembly of claim 18,

at least two of the cylinder liner exhaust ports (4012) of the plurality of cylinder liner exhaust ports (4012) are different sizes; and/or

The intermediate cavities (4013) are not communicated with each other; and/or

At least two of the cylinder liner communication holes (4011) of the plurality of cylinder liner communication holes (4011) are different in size.

20. The pump body assembly according to claim 10, characterized in that said cylinder liner (40) has a volume cavity, said pump body assembly further comprising:

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 (20), the piston (20) has the sliding hole, at least a part of pivot (30) wear to establish in the sliding hole, in the piston (20) along with pivot (30) pivoted process, the piston (20) for pivot (30) slide in the piston hole, and the cylinder rotates in step.

21. A fluid machine comprising a pump body assembly according to any one of claims 9 to 20.