CN114576167A

CN114576167A - Compressor body

Info

Publication number: CN114576167A
Application number: CN202011371502.7A
Authority: CN
Inventors: 蔡江畔; 王学贵; 张军; 尹高东; 王玉
Original assignee: Fusheng Industrial Shanghai Co ltd
Current assignee: Fusheng Industrial Shanghai Co ltd
Priority date: 2020-11-30
Filing date: 2020-11-30
Publication date: 2022-06-03
Also published as: TWI771139B; TW202223242A

Abstract

The invention discloses a compressor body, which comprises an air inlet and an air outlet, and also comprises a plurality of silencing cavities, wherein the silencing cavities are arranged in the compressor body, and the pulsation of compressed air flow is attenuated by the silencing cavities. The invention designs the silencing cavity by fully utilizing the structural space of the compressor body, and forms attenuation to the pulsation of the compressed airflow, thereby effectively reducing the airflow noise of the machine.

Description

Compressor body

Technical Field

The present invention relates to a Compressor (Compressor) technology, and more particularly, to a Compressor body structure.

Background

In the traditional compressor structure, an airflow pulsation attenuation device is only designed locally, the structural space is not fully utilized, and the mechanical airflow noise is large.

Disclosure of Invention

In view of the above, an object of the present invention is to provide a compressor housing, which can effectively achieve attenuation of pulsation of a compressed air flow.

In order to achieve the above object, the present invention provides a compressor body, which includes an air inlet and an air outlet, and is characterized in that the compressor body further includes: and a plurality of muffling cavities arranged in the machine body, wherein the compressed airflow pulsation is attenuated by the plurality of muffling cavities.

In an embodiment of the present invention, the plurality of muffling chambers comprise: the first-order exhaust silencing cavity and the second-order exhaust silencing cavity are arranged on the exhaust bearing seat of the machine body and are respectively positioned on two sides of the exhaust cavity of the exhaust bearing seat.

In an embodiment of the present invention, the plurality of muffling chambers further comprise: the exhaust silencing device comprises a first-order exhaust silencing cavity, an exhaust bearing seat, a second-order exhaust silencing cavity, a third-order exhaust silencing cavity and a fourth-order exhaust silencing cavity, wherein the first-order exhaust silencing cavity and the second-order exhaust silencing cavity are arranged on the exhaust bearing seat and are located at one end of the exhaust cavity, and the third-order exhaust silencing cavity and the fourth-order exhaust silencing cavity are arranged between the first-order exhaust silencing cavity and the second-order exhaust silencing cavity.

In an embodiment of the invention, the first-order exhaust muffling cavity and the second-order exhaust muffling cavity are rectangular cavities and define a first long axis direction, and the ratio of the length of the first-order exhaust muffling cavity and the length of the second-order exhaust muffling cavity along the first long axis direction to the length of the exhaust bearing seat along the first long axis direction is 1:5 to 1:1.2, respectively.

In an embodiment of the invention, at least two first communication holes or at least two first conduction pipes are disposed between the first-order exhaust muffling chamber and the exhaust chamber, and at least two second communication holes or at least two second conduction pipes are disposed between the second-order exhaust muffling chamber and the exhaust chamber.

In an embodiment of the invention, the third-order exhaust muffling cavity and the fourth-order exhaust muffling cavity are rectangular cavities and define a second long axis direction, and the ratio of the length of the third-order exhaust muffling cavity and the length of the fourth-order exhaust muffling cavity along the second long axis direction to the length of the exhaust cavity along the second long axis direction is 1:5 to 1:2, respectively.

In an embodiment of the present invention, at least one third communicating hole or at least one third conducting pipe is disposed between the third-order exhaust muffling chamber and the exhaust chamber, and at least one fourth communicating hole or at least one fourth conducting pipe is disposed between the fourth-order exhaust muffling chamber and the exhaust chamber.

In an embodiment of the present invention, an end surface of the third-order exhaust muffling chamber away from the exhaust chamber is provided with a plurality of third through holes, and an end surface of the fourth-order exhaust muffling chamber away from the exhaust chamber is provided with a plurality of fourth through holes.

In an embodiment of the invention, an area of each of the third through holes is smaller than an area of each of the fourth through holes.

In an embodiment of the present invention, a total area of the third through holes occupies 10% to 40% of an area of the end surface of the third-order exhaust muffling cavity.

In an embodiment of the present invention, a total area of the fourth through holes accounts for 30% to 70% of an area of the end surface of the fourth-order exhaust muffler chamber.

In an embodiment of the present invention, on an orthographic projection surface of an end surface of the exhaust bearing seat far from the exhaust cavity, a total area of the first-order exhaust muffling cavity, the second-order exhaust muffling cavity, the third-order exhaust muffling cavity and the fourth-order exhaust muffling cavity accounts for 20% to 50% of an area of the end surface of the exhaust cavity.

In an embodiment of the present invention, the plurality of muffling chambers comprise: the first-order organism muffling cavity and the second-order organism muffling cavity are arranged at the periphery of the compression cavity of the organism in parallel and are positioned at one end of the exhaust cavity of the exhaust bearing seat of the organism.

In an embodiment of the present invention, at least one first body communicating hole or at least one first body conducting tube is disposed between the first-order body muffling chamber and the exhaust chamber, and at least one second body communicating hole or at least one second body conducting tube is disposed between the second-order body muffling chamber and the exhaust chamber.

In an embodiment of the present invention, the plurality of muffling chambers comprise: the first-order high-pressure silencing cavity and the second-order high-pressure silencing cavity are respectively arranged at the periphery of the exhaust bearing seat, the exhaust bearing seat is provided with two rotor positioning holes, and the first-order high-pressure silencing cavity and the second-order high-pressure silencing cavity are respectively positioned at two sides of the exhaust cavity and are respectively arranged corresponding to the two rotor positioning holes.

In an embodiment of the present invention, the first-order high-pressure muffling chamber and the second-order high-pressure muffling chamber respectively have at least one muffling hole, and the muffling hole is located in the compression chamber far away from the machine body and is adjacent to one end face of the exhaust chamber.

In an embodiment of the present invention, the plurality of muffling chambers are double-walled cavities.

In an embodiment of the present invention, a pipe-shaped muffler is further disposed at an inner edge of the air inlet and/or the air outlet of the machine body, and the pipe-shaped muffler has a hollow structure.

In an embodiment of the present invention, the pipe type muffler includes: an annular anechoic cavity concentrically surrounded by an outer ring plate and an inner ring plate, wherein the inner ring plate is provided with a plurality of perforations; a plurality of annular plates disposed opposite to each other, the annular plates being connected to one ends of the outer and inner annular plates and closing one ends of the annular muffling chambers; the outer periphery of the annular plate extends outwards to protrude out of the outer ring plate, and the annular plate forms a flange structure.

In an embodiment of the present invention, the pipe type muffler includes: and the two side edges of the partition plate are respectively connected with the outer ring plate and the inner ring plate and divide the annular silencing cavity into two spaces.

The invention designs the silencing cavity structure by fully utilizing the structural space of the compressor body, particularly the space of the exhaust bearing seat, and forms effective attenuation to the pulsation of the compressed airflow, thereby effectively reducing the airflow noise of the machine.

The above description will be described in detail by embodiments, and further explanation will be provided for the technical solution of the present invention.

Drawings

In order to make the aforementioned and other objects, features, and advantages of the invention, as well as others which will become apparent, reference is made to the following description taken in conjunction with the accompanying drawings in which:

fig. 1A is a side view of a body of a compressor of the present invention;

FIG. 1B is a cross-sectional view taken along line A-A of FIG. 1A;

fig. 2A is a top view of a compressor block of the present invention;

FIG. 2B is a cross-sectional view taken along line B-B of FIG. 2A;

fig. 3A is a top view of a compressor block of the present invention;

FIG. 3B is a cross-sectional view taken along line C-C of FIG. 3A;

fig. 4A is a top view of a compressor block of the present invention;

FIG. 4B is a cross-sectional view taken along line D-D of FIG. 4A;

FIG. 5A is a perspective view of a preferred pipe muffler of the present invention;

fig. 5B is a perspective view of another preferred pipe type muffler according to the present invention.

Detailed Description

For a better understanding and completeness of the description of the present invention, reference is made to the appended drawings and various embodiments described below in which like reference numerals represent the same or similar elements. In other instances, well-known elements and steps have not been described in detail in order to avoid unnecessarily obscuring the present invention. In addition, for the sake of simplicity, some conventional structures and elements are shown in the drawings in a simple schematic manner.

As shown in fig. 1A, the compressor of the present invention may be, for example, a screw compressor, which has a housing 100, wherein the housing 100 includes an air inlet 101 and an air outlet 102, the air inlet 102 is connected to a compression cavity 120 of the housing 100, and the air outlet 102 is connected to an air outlet cavity 110 of the housing 100. The housing 100 further includes an exhaust bearing seat 10, a gear 30, a rotor 40, and the like, wherein the rotor 40 is spiral, and may include, for example, a male screw 41 (or "male rotor") having convex teeth and a female screw 42 (or "female rotor") having concave grooves (as shown in fig. 3B). As shown in fig. 1B, the body 100 of the present invention further comprises a plurality of muffling chambers, which may include, for example, but not limited to,

muffling chambers

11, 12, 13, 14, 16, 17 shown in fig. 1B, wherein the pulsations of the compressed air flow are attenuated via the plurality of muffling chambers.

In the present invention, as shown in fig. 1B and fig. 2A and 2B, the muffling cavities may include, for example, a first-order exhaust muffling cavity 11 and a second-order exhaust muffling cavity 12, which are disposed on the exhaust bearing seat 10 and located at two sides of the exhaust cavity 110 of the exhaust bearing seat 10 respectively, and are used for performing first-order and second-order attenuation on the pulsation of the compressed air during the exhaust process. At least two first communication holes 111 (or at least two first conduction pipes) are formed between the first-order exhaust silencing chamber 11 and the exhaust chamber 110, and at least two second communication holes 121 (or at least two second conduction pipes) are formed between the second-order exhaust silencing chamber 12 and the exhaust chamber 110. The compressed gas can enter the first-order exhaust silencing chamber 11 and the second-order exhaust silencing chamber 12 through the first communication hole 111 (or the first conduction pipe) and the second communication hole 121 (or the second conduction pipe), and then exit from the chambers through the first communication hole 111 (or the first conduction pipe) and the second communication hole 121 (or the second conduction pipe), so that the noise energy can be attenuated by the friction of the communication holes or the conduction pipes.

In the present embodiment, the first-order exhaust muffling cavity 11 and the second-order exhaust muffling cavity 12 are located below the two rotors. Preferably, the first-order exhaust muffling cavity 11 and the second-order exhaust muffling cavity 12 may be rectangular parallelepiped cavities and define a first long axis direction L1, a ratio of a length of the first-order exhaust muffling cavity 11 along the first long axis direction L1 to a length of the exhaust bearing seat 10 along the first long axis direction L1 is 1:5 to 1:1.2, and a ratio of a length of the second-order exhaust muffling cavity 12 along the first long axis direction L1 to a length of the exhaust bearing seat 10 along the first long axis direction L1 is 1:5 to 1: 1.2. In the invention, the longer the lengths of the first-order exhaust silencing cavity 11 and the second-order exhaust silencing cavity 12 are, the larger the cavity is, and the better the effect is.

With continued reference to fig. 1B and fig. 2A and 2B, the muffling cavities may further include a third-order exhaust muffling cavity 13 and a fourth-order exhaust muffling cavity 14, which are disposed on the exhaust bearing seat 10 and located at one end, for example, the rear end, of the exhaust cavity 110. As shown in fig. 1B, the third-order exhaust muffling chamber 13 and the fourth-order exhaust muffling chamber 14 are disposed between the first-order exhaust muffling chamber 11 and the second-order exhaust muffling chamber 12, at least one third communicating hole 131 (or at least one third conducting pipe) is disposed between the third-order exhaust muffling chamber 13 and the exhaust chamber 110, and at least one fourth communicating hole 141 (or at least one fourth conducting pipe) is disposed between the fourth-order exhaust muffling chamber 14 and the exhaust chamber 110. The compressed gas may enter the third-order exhaust muffling chamber 13 and the fourth-order exhaust muffling chamber 14 through the third communicating hole 131 (or the third conducting pipe) and the fourth communicating hole 141 (or the fourth conducting pipe), respectively, and then exit from the chambers through the third communicating hole 131 (or the third conducting pipe) and the fourth communicating hole 141 (or the fourth conducting pipe), so that noise energy may be attenuated by friction between the communicating holes or the conducting pipes. The third-order exhaust silencing cavity 13 and the fourth-order exhaust silencing cavity 14 can act together with the first-order exhaust silencing cavity 11 and the second-order exhaust silencing cavity 12 and are used for carrying out first-order, second-order, third-order and fourth-order attenuation on the pulsation of the compressed airflow in the exhaust process.

Preferably, the third-order exhaust muffling cavity 13 and the fourth-order exhaust muffling cavity 14 are, for example, rectangular parallelepiped cavities and define a second long axis direction L2, and the ratio of the length of the third-order exhaust muffling cavity 13 and the fourth-order exhaust muffling cavity 14 along the second long axis direction L2 to the length of the exhaust cavity 110 along the second long axis direction L2 is 1:5 to 1:2, respectively.

As shown in fig. 2B, in the present embodiment, a plurality of third through holes 132 may be formed on an end surface of the third-order exhaust muffling chamber 13 away from the exhaust chamber 110, and a plurality of fourth through holes 142 are formed on an end surface of the fourth-order exhaust muffling chamber 14 away from the exhaust chamber 110. The third communicating hole 131 and the third through hole 132 are respectively opened at two opposite sides of the third-order exhaust muffling chamber 13, and the fourth communicating hole 141 and the fourth through hole 142 are respectively opened at two opposite sides of the fourth-order exhaust muffling chamber 14. Preferably, the area of each third through hole 131 is smaller than that of each fourth through hole 141, that is, the aperture of each third through hole 132 is smaller than that of each fourth through hole 142. More preferably, the total area of the third through holes 131 accounts for 10% to 40% of the area of the end surface of the third-order exhaust muffler chamber 13. The total area of the fourth through holes 141 accounts for 30 to 70 percent of the area of the end surface of the fourth-order exhaust muffler chamber 14.

Generally, the larger the cavity volume of the muffling cavity, the lower the attenuated frequency under the same conditions; and the larger the aperture of the perforations in the muffling chamber, the higher the frequency of attenuation. In general, if a large cavity corresponds to a small aperture, the corresponding frequency is relatively low, and if a large aperture corresponds to a large cavity, the attenuated frequency deviates from the target frequency. In the present invention, since the third order frequency is smaller than the fourth order frequency, the cavity volume of the third order exhaust muffling cavity 13 can be made larger and the aperture of the third through hole 131 can be made smaller by design.

As shown in fig. 2B, in this embodiment, on an orthographic projection surface of an end surface of the exhaust bearing seat 10 far from the exhaust cavity 110, a total area of the first-order exhaust muffling cavity 11, the second-order exhaust muffling cavity 12, the third-order exhaust muffling cavity 13 and the fourth-order exhaust muffling cavity 14 occupies 20% to 50% of an area of the end surface of the exhaust cavity 110.

In the present invention, as shown in fig. 3A and 3B, with reference to fig. 1B, the plurality of muffling chambers may further include a first-order body muffling chamber 16 and a second-order body muffling chamber 17, which are juxtaposed at the periphery of the compression chamber 120 of the body 100 and located at one end of the exhaust chamber 110 of the exhaust bearing housing 10 of the body 100, for example, at the front end of the exhaust chamber 110. In addition, at least one first body communication hole 161 (or at least one first body conduction pipe, as shown in fig. 1B) is provided between the first-order body muffling chamber 16 and the exhaust chamber 110, and at least one second body communication hole 171 (or at least one second body conduction pipe, as shown in fig. 1B) is provided between the second-order body muffling chamber 17 and the exhaust chamber 110. It should be noted that although both the first body communication hole 161 and the second body communication hole 171 are shown in fig. 1B, the first body communication hole 161 and the second body communication hole 171 are actually located in different cross sections (i.e., they should not actually be present in the same cross section), and for the sake of omitting the drawings, the second body communication hole 171 that is actually visible in the cross section along the line a-a in fig. 1A is shown in solid lines in fig. 1B, and the first body communication hole 161 that is not actually visible in the cross section along the line a-a in fig. 1A is shown in broken lines. The compressed gas can respectively enter the first-order body silencing chamber 16 and the second-order body silencing chamber 17 through the first body communicating hole (or the first body conducting pipe) and the second body communicating hole 171 (or the second body conducting pipe), and then exit from the first body communicating hole (or the first body conducting pipe) and the second body communicating hole 171 (or the second body conducting pipe), and the noise energy is attenuated by the friction of the communicating holes or the conducting pipes. The first order body muffling chamber 16 and the second order body muffling chamber 17 can be used to provide first and second order attenuation of the compressed air flow pulsations.

In the present embodiment, the first-order body muffling cavity 16 is, for example, located below the female screw 42, and has a relatively large space, and the second-order body muffling cavity 17 is, for example, located below the male screw 41, so that the cavity volume of the first-order body muffling cavity 16 is larger than the cavity volume of the second-order body muffling cavity 17. In general, the cavity volumes of the first and second order

body muffling cavities

16 and 17 may be as large as possible to fill the available space of the compression cavity 120. However, it is understood that the body 100 may be disposed at the side or above the rotor as the structure of the body allows, and these are not intended to limit the present invention.

As shown in fig. 4A and 4B, in the present invention, the plurality of muffling chambers may further include a first-order high-pressure muffling chamber 18 and a second-order high-pressure muffling chamber 19, which are respectively disposed at the periphery of the exhaust bearing housing 10. The exhaust bearing seat 10 has two rotor positioning holes 411, 421 for respectively and fixedly mounting the two rotors, i.e. the male screw 41 and the female screw 42. The first-order high-pressure muffling cavity 18 and the second-order high-pressure muffling cavity 19 are respectively located at two sides of the exhaust cavity 110 and are respectively arranged corresponding to the two rotor positioning holes 41 and 421. Preferably, the first-order high-pressure muffling chamber 18 and the second-order high-pressure muffling chamber 19 can respectively have at least one

muffling hole

181, 191 which is located at an end surface of the compression chamber 120 far away from the machine body 100 and adjacent to the exhaust chamber 110. The first-order high-pressure muffling chamber 18 and the second-order high-pressure muffling chamber 19 can be used for first-order and second-order attenuation of the pulsation of the compressed air flow during the compression process.

In the present invention, the plurality of muffling chambers, including, for example, muffling

chambers

11, 12, 13, 14, 16, 17, 18, 19, may be double-walled cavities for forming double-walled separation of the compressed air stream. Preferably, the muffling

cavities

11, 12, 13, 14, 16, 17, 18, 19 may be Helmholtz resonators (Helmholtz resonators). During the compression process and the exhaust process, the compression airflow pulsation can be attenuated through the silencing

chambers

11, 12, 13, 14, 16, 17, 18, 19, so that the airflow noise of the machine can be effectively reduced.

Referring back to fig. 1A in conjunction with fig. 2A, 5A and 5B, in the present invention, a pipe type muffler 21 may be further provided at an inner edge of the air inlet 101 of the machine body 100, and/or a pipe type muffler 22 may be further provided at an inner edge of the air outlet 102 of the machine body 100, and the

pipe type mufflers

21, 22 may be of a hollow structure, for example.

As shown in fig. 5A, with reference to fig. 1A, the pipe-type muffler 21 may include, for example, an annular muffling chamber 210 concentrically surrounded by an outer ring plate 212 and an inner ring plate 211, wherein the inner ring plate 211 has a plurality of

perforations

2111 and 2112. The pipe-type muffler 21 may further include a plurality of annular plates, for example, an annular plate 213 and an annular plate 214, which are disposed opposite to each other, and the

annular plates

213 and 214 are connected to one ends of the outer and inner

annular plates

212 and 211 and close one end of the annular muffling chamber 210, for example, the annular plate 213 may close an upper end of the annular muffling chamber 210, and the annular plate 214 may close a lower end of the annular muffling chamber 210.

In this embodiment, referring to fig. 1A and 2A in combination, the outer periphery of the annular plate 213 may further extend outward to protrude from the outer annular plate 212, so that the annular plate 213 may form a flange structure.

Preferably, as shown in fig. 5A, the pipe-type muffler 21 may further include a partition plate 215 disposed between the annular plate 213 and the annular plate 214, two sides of the partition plate 215 are respectively connected to the outer annular plate 212 and the inner annular plate 211, and the annular muffling chamber 210 is divided into two spaces, for example, a first space 210-1 located at an upper portion and a second space 210-2 located at a lower portion, and the inner annular plate 211 corresponding to the first space 210-1 has a plurality of through holes 2111, and the inner annular plate 211 corresponding to the second space 210-2 has a plurality of through holes 2112, so as to form a two-stage muffler. More preferably, the ratio of the length H1 of the first space 210-1 to the length H2 of the second space 210-2 along the long axis direction of the pipe-shaped muffler 21 (i.e., H1: H2) is 1:1 to 2: 1. However, it is understood that in other embodiments, the annular muffling chamber 210 can be divided into three or more spaces to form mufflers with more muffling orders, which is not intended to limit the present invention.

As shown in fig. 5B, the pipe-type muffler 22 may include an annular muffling chamber 220 concentrically surrounded by an outer ring plate 222 and an inner ring plate 221, and the inner ring plate 221 has a plurality of perforations 2211. The pipe type muffler 22 may further include a plurality of annular plates 223, for example, an annular plate 223 and an annular plate 224, which are disposed opposite to each other, and the

annular plates

223 and 224 are connected to one ends of the outer ring plate 222 and the inner ring plate 221 and close one end of the annular muffling chamber 220, for example, the annular plate 223 may close an upper end of the annular muffling chamber 220, and the annular plate 224 may close a lower end of the annular muffling chamber 220. Preferably, the outer periphery of the annular plate 223 may further extend outward to protrude from the outer annular plate 221, so that the annular plate 223 may form a flange structure.

In the present embodiment, the structure of the pipe-shaped muffler 22 provided at the exhaust port 102 is different from the structure of the pipe-shaped muffler 21 provided at the intake port 101, i.e., does not have a partition plate. However, it is understood that in other embodiments, the structure of the pipe-type muffler 22 provided at the exhaust port 102 may be the same as that of the pipe-type muffler 21 provided at the intake port 101, that is, the structure shown in fig. 5A, which is not intended to limit the present invention.

The invention designs the structure of a plurality of silencing cavities by fully utilizing the structural space of the compressor body, particularly the space of the exhaust bearing seat, and can form double-wall isolation to compressed airflow and attenuation to the pulsation of the compressed airflow, thereby effectively reducing the airflow noise of machinery.

Although the present invention has been described with reference to the above embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a compressor's organism, its is including air inlet and gas vent, its characterized in that, the organism still includes:

and a plurality of muffling cavities arranged in the machine body, wherein the compressed airflow pulsation is attenuated by the plurality of muffling cavities.

2. The airframe as recited in claim 1, wherein said plurality of muffling chambers comprise:

the first-order exhaust silencing cavity and the second-order exhaust silencing cavity are arranged on the exhaust bearing seat of the machine body and are respectively positioned on two sides of the exhaust cavity of the exhaust bearing seat.

3. The airframe as recited in claim 2, wherein said plurality of muffling chambers further comprise:

the exhaust silencing device comprises a first-order exhaust silencing cavity, an exhaust bearing seat, a second-order exhaust silencing cavity, a third-order exhaust silencing cavity and a fourth-order exhaust silencing cavity, wherein the first-order exhaust silencing cavity and the second-order exhaust silencing cavity are arranged on the exhaust bearing seat and are located at one end of the exhaust cavity, and the third-order exhaust silencing cavity and the fourth-order exhaust silencing cavity are arranged between the first-order exhaust silencing cavity and the second-order exhaust silencing cavity.

4. The airframe as recited in claim 2, wherein said first order exhaust muffler chamber and said second order exhaust muffler chamber are rectangular parallelepiped cavities and define a first long axis direction, and a ratio of a length of said first order exhaust muffler chamber and said second order exhaust muffler chamber along said first long axis direction to a length of said exhaust bearing housing along said first long axis direction is 1:5 to 1:1.2, respectively.

5. The machine body as claimed in claim 2, wherein at least two first communication holes or at least two first conduction pipes are provided between the first-order exhaust muffling chamber and the exhaust chamber, and at least two second communication holes or at least two second conduction pipes are provided between the second-order exhaust muffling chamber and the exhaust chamber.

6. The airframe as recited in claim 3, wherein said third order exhaust muffler chamber and said fourth order exhaust muffler chamber are rectangular parallelepiped cavities and define a second major axis direction, and a ratio of a length of said third order exhaust muffler chamber and said fourth order exhaust muffler chamber along said second major axis direction to a length of said exhaust chamber along said second major axis direction is 1:5 to 1:2, respectively.

7. The machine body as claimed in claim 3, wherein at least one third communicating hole or at least one third conducting pipe is provided between the third-order exhaust muffling chamber and the exhaust chamber, and at least one fourth communicating hole or at least one fourth conducting pipe is provided between the fourth-order exhaust muffling chamber and the exhaust chamber.

8. The airframe as recited in claim 3, wherein a plurality of third through holes are formed in an end surface of said third-order exhaust muffling chamber away from said exhaust chamber, and a plurality of fourth through holes are formed in an end surface of said fourth-order exhaust muffling chamber away from said exhaust chamber.

9. The airframe as recited in claim 8, wherein an area of each of said third perforations is less than an area of each of said fourth perforations.

10. The housing of claim 8, wherein a total area of the third plurality of perforations is between 10% and 40% of an area of the end face of the third order exhaust muffler chamber.

11. The housing of claim 8, wherein a total area of the fourth plurality of perforations is 30% to 70% of an area of the end face of the fourth order exhaust muffler chamber.

12. The airframe as recited in claim 3, wherein on an orthographic projection of an end face of said exhaust bearing housing away from said exhaust cavity, a total area of said first order exhaust muffler cavity, said second order exhaust muffler cavity, said third order exhaust muffler cavity and said fourth order exhaust muffler cavity occupies 20% to 50% of an area of said end face of said exhaust cavity.

13. The body of claim 1, 2 or 3, wherein the plurality of muffling chambers comprise:

the first-order organism muffling cavity and the second-order organism muffling cavity are arranged at the periphery of the compression cavity of the organism in parallel and are positioned at one end of the exhaust cavity of the exhaust bearing seat of the organism.

14. A combined chamber body structure as claimed in claim 13, wherein at least one first body communicating hole or at least one first body conducting pipe is provided between the first stage body muffling chamber and the exhaust chamber, and at least one second body communicating hole or at least one second body conducting pipe is provided between the second stage body muffling chamber and the exhaust chamber.

15. The body of claim 1, 2 or 3, wherein the plurality of muffling chambers comprise:

the first-order high-pressure silencing cavity and the second-order high-pressure silencing cavity are respectively arranged at the periphery of the exhaust bearing seat, the exhaust bearing seat is provided with two rotor positioning holes, and the first-order high-pressure silencing cavity and the second-order high-pressure silencing cavity are respectively positioned at two sides of the exhaust cavity and are respectively arranged corresponding to the two rotor positioning holes.

16. The composite chamber structure as claimed in claim 15, wherein the first-order and second-order high-pressure muffling chambers have at least one muffling hole respectively, the muffling hole being located at an end surface of the compression chamber remote from the housing and adjacent to the exhaust chamber.

17. The airframe as recited in claim 1, wherein said plurality of muffling chambers are double-walled cavities.

18. The machine body according to claim 1, wherein a pipe-type muffler is further provided at an inner edge of the intake port and/or the exhaust port of the machine body, and the pipe-type muffler has a hollow structure.

19. The block of claim 18, wherein the tube-type muffler comprises:

an annular anechoic chamber concentrically surrounded by an outer ring plate and an inner ring plate, wherein the inner ring plate has a plurality of perforations;

a plurality of annular plates disposed opposite to each other, the annular plates being connected to one ends of the outer and inner annular plates and closing one ends of the annular muffling chambers;

wherein, the outer periphery of the annular plate further extends outwards to protrude the outer annular plate, and the annular plate forms a flange structure.

20. The block of claim 19, wherein the tube-type muffler comprises:

and the two side edges of the partition plate are respectively connected with the outer ring plate and the inner ring plate and divide the annular silencing cavity into two spaces.