CN112524034B

CN112524034B - Flange structure, pump body assembly and fluid machine

Info

Publication number: CN112524034B
Application number: CN202011592502.XA
Authority: CN
Inventors: 于瑞波; 宋雪威; 杜忠诚; 任丽萍; 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: 2022-05-27
Anticipated expiration: 2040-12-29
Also published as: CN112524034A

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 along the circumference of flange structure, and the flange structure has the exhaust vent group, and the exhaust vent group has a plurality of microporous structures, and microporous structure is located the terminal surface of flange structure and communicates with the tank bottom of amortization recess. 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, there is provided a flange structure, a side of the flange structure facing a cylinder liner is provided with a silencing groove, the silencing groove extends along a circumferential direction of the flange structure, the flange structure has a vent hole group, and the vent hole group has a plurality of microporous structures, and the microporous structures are located on an end surface of the flange structure and communicate with a groove bottom of the silencing groove.

Furthermore, the ends of the silencing grooves are not communicated so as to form a blocking structure between the ends of the silencing grooves, and the exhaust hole group is positioned at one end of each silencing groove.

Further, the cross section of the pores of the microporous structure is one or more of circular, polygonal and elliptical.

Further, the plurality of microporous structures form an oval exhaust hole group; or a plurality of micropore structures form a circular exhaust hole group; or a plurality of microporous structures form a polygonal exhaust hole group; or the plurality of micropore structures form a radial exhaust hole group.

Further, the area S0 of the cross section of the pores of the microporous structure is less than or equal to 3mm²。

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 flow passage sectional area S of the narrow flow passage area, the area S0 of the pore section of the microporous structure and the number n of the microporous structures satisfy the following conditions: n S0 is less than or equal to 3S.

Further, the number of the rib-shaped structures is more than 2 and less than 5.

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

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, satisfy between the diameter E of cylinder jacket exhaust hole and the diameter D of the microporous structure of flange structure: d is not less than E and not more than 16D.

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, the sizes of the exhaust holes of the at least two limiting plates are different; and/or at least two of the plurality of cylinder liner exhaust ports 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.

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

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 facing the cylinder sleeve is provided with the silencing groove, the silencing groove extends along the circumferential direction of the flange structure, the flange structure is provided with the exhaust hole group, the exhaust hole group is provided with a plurality of microporous structures, and the microporous structures are positioned on the end surface of the flange structure and are communicated with the groove bottom of the silencing groove.

From the above description, it can be seen that the sound absorption performance of the structure can be effectively improved and the noise can be reduced by arranging the silencing groove on one side of the flange structure to increase the flow path of the high-pressure gas, arranging the microporous structure in the silencing groove to exhaust the gas, and matching the silencing groove and the microporous structure; the end face of the flange structure is provided with a plurality of micropore structures, so that the noise reduction effect is not attenuated under the condition of high-frequency motion of the rotary cylinder compressor, and the noise reduction performance is stable. Meanwhile, the rigidity of the flange structure can be improved by the micropore 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, one side of the flange structure is provided with a circumferentially extending silencing groove, and the silencing groove is provided with a vent hole group. Furthermore, the exhaust hole group is provided with a plurality of microporous structures, and the microporous structures are positioned on the end face of the flange structure and communicated with the bottom of the silencing groove. The gas enters the silencing groove through the flange structure and is discharged from the microporous structure after multiple times of internal throttling expansion. The sound absorption performance of the structure can be effectively improved and the noise can be reduced by matching the silencing groove with the micropore structure. Meanwhile, the rigidity of the flange structure can be improved by the micropore structure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiment(s) 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 shows a schematic view of the end face of the flange structure of the present invention with a micro-porous structure;

figure 4 shows a schematic view of a plate of confinement of the invention;

FIG. 5 shows a schematic view of the cross-sectional area S of the transfer channels at a narrow region in the flange structure of the invention;

FIG. 6 shows a schematic diagram of one embodiment of a set of exhaust holes in the present invention;

FIG. 7 shows a schematic diagram of another embodiment of a vent set in accordance with the present invention;

FIG. 8 is a schematic diagram of another embodiment of a vent set in accordance with the present invention;

FIG. 9 shows a schematic view of another embodiment of a vent set in accordance with the present invention;

FIG. 10 is a schematic diagram of another embodiment of a vent set in accordance with the present invention;

FIG. 11 shows a schematic diagram of another embodiment of a vent set in accordance with the present invention.

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; 5021. a blocking structure; 5031. a silencing groove; 5041. a microporous structure; 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, and 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. 1 to 4, a side of the flange structure facing the cylinder liner 40 is provided with a noise reduction groove 5031, the noise reduction groove 5031 extends along a circumferential direction of the flange structure, the flange structure has a vent hole group, and the vent hole group has a plurality of microporous structures 5041, and the microporous structures 5041 are located at an end face of the flange structure and communicate with a groove bottom of the noise reduction groove 5031.

From the above description, it can be seen that the sound absorption performance of the structure can be effectively improved and the noise can be reduced by forming the noise reduction groove 5031 on one side of the flange structure to increase the flow path of the high-pressure gas, forming the microporous structure 5041 in the noise reduction groove 5031 for exhausting the gas, and using the noise reduction groove 5031 and the microporous structure 5041 in combination. And the microcellular structures 5041 may improve the rigidity 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, a circumferentially extending silencing groove 5031 is formed in one side of the flange structure, and a set of exhaust holes is formed in the silencing groove 5031. Further, the exhaust hole group has a plurality of micro-porous structures 5041, and the micro-porous structures 5041 communicate with the groove bottom of the sound absorbing groove 5031. The gas enters the noise reduction groove 5031 through the flange structure, and is discharged from the microporous structure 5041 after multiple times of internal throttling expansion. The combination of the muffling groove 5031 and the microporous structure 5041 can effectively improve the sound absorption of the structure and reduce noise. And the microcellular structures 5041 may improve the rigidity of the flange structure.

The end face of the flange structure is provided with the plurality of micro-hole structures 5041, so that the noise reduction effect is not attenuated and the noise reduction performance is stable under the condition of high-frequency motion of the rotary cylinder compressor.

As shown in fig. 3, the ends of the muffling recess 5031 are not communicated to form a blocking structure 5021 between the ends of the muffling recess 5031, and the exhaust hole group is located at one end of the muffling recess 5031. Of course, the ends of the muffling groove 5031 may be connected, and the end surface of the flange structure without the blocking structure may be provided with a set of exhaust holes.

Specifically, a structure 5021 is provided to realize that the silencing grooves 5031 are not communicated end to end, so that gas enters the silencing grooves 5031 to flow directionally, and meanwhile, the blocking structure 5021 has the effect of enhancing the rigidity of the flange structure, and the stability of the flange structure is improved.

In the present invention, the cross section of the pores of the microporous structure 5041 is one or more of circular, polygonal and elliptical. Specifically, the microporous structure 5041 may be formed by one of a circle, a polygon and an ellipse, or may be formed by matching a plurality of circles, polygons and ellipses. The design of the micro-porous structure 5041 can improve the sound absorption quantity and reduce the noise in the operation of the rotary cylinder compressor. Specifically, the polygon may be a triangle or a diamond.

The plurality of microporous structures 5041 may form an elliptical exhaust hole group, a circular exhaust hole group, a polygonal exhaust hole group, a radial exhaust hole group, or the like, and the shapes of the exhaust hole groups that the plurality of microporous structures 5041 may form are too many, which is not exemplified here. Reference may be made in particular to several embodiments illustrated in figures 6 to 11.

In the present invention, the cross-sectional area S0 of the micro-porous structure 5041 is not more than 3mm². The pore area of the microporous structure 5041 is less than or equal to 3mm²In the process, the micro-porous structure 5041 can effectively improve the low-frequency noise elimination within 1000HZ and effectively reduce the noise within 1000 HZ.

As shown in fig. 3, 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, as shown in fig. 5, the flow passage sectional area S of the narrow flow passage region, the area S0 of the hole sectional area of the microporous structure 5041, and the number n of the microporous structures 5041 satisfy: n S0 is less than or equal to 3S.

Specifically, when n × S0 is less than or equal to 3S, the gas is throttled and expanded when flowing through the wide and narrow over-flow regions, and then is discharged through the microporous structure 5041, so that noise can be effectively reduced and silenced.

In the invention, the number of the rib-shaped structures is more than 2 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 2 and less than 5, the muffling function is achieved. In this embodiment, the number of rib-like structures is 3.

It should be noted that the distance between the central axes of the rib structures and the flange structure may be 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.

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. In the present embodiment, the stopper plate is an upper stopper 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 silencing groove 5031 of the flange structure, is throttled and expanded for multiple times in the silencing groove 5031 to achieve the effects of noise reduction and silencing, and is then discharged through the microporous structure 5041.

As shown in fig. 3, the stopper plate exhaust holes 7011 are provided at intervals in the circumferential direction of the flange structure from the exhaust hole group of the flange structure. In the figure, the exhaust hole group of the limiting plate is staggered with the exhaust hole group of the flange structure, so that high-pressure gas entering from the exhaust hole 7011 of the limiting plate cannot be directly exhausted from the exhaust hole group, but flows for a certain distance inside the silencing groove 5031, 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 through the exhaust hole group.

It should be noted that, 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 structure 5021, and since the blocking structure 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 structure 5021 are not listed.

As shown in fig. 2 to 3, the diameter E of the cylinder liner exhaust hole 4012 and the diameter D of the microporous structure 5041 of the flange structure satisfy: d is not less than E and not more than 16D.

Specifically, when the diameter D of the microporous structure 5041 satisfies that D is not less than E and not more than 16D, it can be ensured that the gas is discharged from the cylinder liner exhaust holes 4012 and the gas is discharged from the upper flange 50 through the microporous structure 5041, and the microporous structure 5041 can effectively improve the sound absorption capacity, so as to reduce the total noise of the pump body assembly in the operation process.

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, a plurality of stopper plate exhaust holes 7011 are provided, and the plurality of cylinder liner communication holes 4011 and the plurality of stopper plate exhaust holes 7011 are provided in one-to-one correspondence.

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, the at least two limit plate exhaust holes 7011 are different in size. At least two of the cylinder liner exhaust ports 4012 of the plurality of cylinder liner exhaust ports 4012 are sized differently. 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. 3 to 4, the limiting plate exhaust holes 7011 and the exhaust hole groups of the flange structure are respectively located at two ends of the muffling groove 5031 of the flange structure and at two sides of the blocking structure 5021 of the flange structure.

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

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 formed on the cylinder along the radial direction of the cylinder, the piston 20 has a sliding hole, at least a portion of the rotating shaft 30 penetrates through the sliding hole, during the process that the piston 20 rotates 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:

the muffling groove 5031 is formed at one side of the flange structure to increase the flow path of the high-pressure gas, the microporous structure 5041 is formed in the muffling groove 5031 to exhaust the gas, and the muffling groove 5031 and the microporous structure 5041 are matched to use, so that the sound absorption performance of the structure can be effectively improved, and the noise can be reduced. The end face of the flange structure is provided with a plurality of microporous structures 5041, so that the noise reduction effect is not attenuated under the condition of high-frequency motion of the rotary cylinder compressor, and the noise reduction performance is stable. And the microcellular structures 5041 may improve the rigidity 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, a circumferentially extending silencing groove 5031 is formed in one side of the flange structure, and a set of exhaust holes is formed in the silencing groove 5031. Further, the exhaust hole group has a plurality of micro-porous structures 5041, and the micro-porous structures 5041 communicate with the groove bottom of the noise cancellation groove 5031. The gas enters the noise reduction groove 5031 through the flange structure, and is discharged from the microporous structure 5041 after multiple times of internal throttling expansion. The combination of the muffling groove 5031 and the microporous structure 5041 can effectively improve the sound absorption of the structure and reduce noise. And the microcellular structures 5041 may improve the rigidity of the flange structure.

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 flange structure, characterized in that a noise reduction groove (5031) is formed at one side of the flange structure facing a cylinder liner (40), the noise reduction groove (5031) extends along the circumferential direction of the flange structure, the flange structure has a vent hole group, the vent hole group has a plurality of microporous structures (5041), the microporous structures (5041) are located at the end face of the flange structure and are communicated with the groove bottom of the noise reduction groove (5031), the side wall of the noise reduction groove (5031) has a plurality of rib-shaped structures protruding towards the central axis of the flange structure, the plurality of rib-shaped structures are arranged at intervals along the side wall of the noise reduction groove (5031) so that the noise reduction groove (5031) has alternately arranged wide flow areas and narrow flow areas, and gas flows from one end of the noise reduction groove (5031) to the other end of the noise reduction groove (5031), and then discharged through the exhaust hole group.

2. The flange structure according to claim 1, wherein the ends of said noise-canceling grooves (5031) are not communicated to form a blocking structure (5021) between the ends of said noise-canceling grooves (5031), and said exhaust hole group is located at one end of said noise-canceling grooves (5031).

3. The flange structure according to claim 1, wherein the cross section of the pores of the microporous structure (5041) is one or more of circular, polygonal and elliptical.

4. A flange structure according to claim 1,

a plurality of said microporous structures (5041) forming said set of gas discharge holes having an elliptical shape; or

A plurality of the microporous structures (5041) form the circular exhaust hole group; or

A plurality of said microporous structures (5041) forming said set of gas discharge holes in a polygon; or

The plurality of microporous structures (5041) form the radial exhaust hole group.

5. The flange structure according to claim 1, wherein the area S0 of the cross-section of the pores of the microporous structure (5041) is less than or equal to 3mm²。

6. The flange structure according to claim 1, wherein the flow passage cross-sectional area S of the narrow flow passage region, the area S0 of the hole cross-section of the microporous structure (5041) and the number n of the microporous structures (5041) are such that: n S0 is less than or equal to 3S.

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

8. A flange structure according to claim 7, characterized in that the number of said rib-like structures is 3.

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

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

11. The pump body assembly of claim 10, 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.

12. The pump body assembly according to claim 11, wherein a diameter E of the cylinder liner vent hole (4012) and a diameter D of the micro-porous structure (5041) of the flange structure satisfy: d is not less than E and not more than 16D.

13. The pump body assembly according to claim 11, 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 a 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), the stopper plate exhaust hole (7011) is plural, and the plurality of stopper plate exhaust holes (7011) are provided in one-to-one correspondence with the plurality of cylinder liner communication holes (4011).

14. The pump body assembly according to claim 13,

the sizes of at least two limiting plate exhaust holes (7011) are different; and/or

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.

15. The pump body assembly according to claim 11, wherein the set of limit plate vent holes (7011) and the set of flange structure vent holes are located at both ends of the flange structure sound-deadening groove (5031) and at both sides of the flange structure blocking structure (5021), respectively.

16. The pump body assembly according to claim 11, 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.

17. A fluid machine, characterized by comprising a pump body assembly according to any one of claims 10 to 16.