Compressor

Abstract

The utility model discloses a compressor. The compressor comprises a machine shell, a main bearing and a silencer. An annular protruding part which extends in the circumferential direction of the machine shell to form a ring and protrudes inwards in the radial direction is arranged in the machine shell. A compression chamber is arranged on one axial side of the annular convex part, and a motor chamber is arranged on the other axial side of the annular convex part; the silencer is attached to the side, facing the motor cavity, of the main bearing and forms an exhaust cavity in a surrounding mode. The working air pressure of the compression chamber and the exhaust chamber is greater than that of the motor chamber; the local surface of the silencer is located between the motor cavity and the exhaust cavity and matched with the annular protruding part, and a sealing piece is arranged at the matching position to form a sealing gap. The annular convex part, the silencer and the main bearing are reasonably arranged, so that the sealing gaps between the silencer and the annular convex part can be used for sealing and protecting the compression chamber and the motor chamber as well as the exhaust chamber and the motor chamber, and the number of sealing structures of the compressor can be reduced; the sealing piece can be conveniently adjusted to the silencer which is small in size, weight and installation difficulty.

Description

Technical Field

[0001] The present application relates to the technical field of compressors, and in particular to a compressor. Background Art

[0002] When the compressor is working, it sucks in low-temperature and low-pressure refrigerant gas from the suction pipe, drives the piston to compress the refrigerant gas through the operation of the motor, and discharges high-temperature and high-pressure refrigerant gas to the exhaust pipe, providing power for the refrigeration cycle.

[0003] The cavity of the compressor mainly includes a motor cavity connected to the suction pipe and a piston cavity connected to the exhaust pipe. In addition, there are some channels or other cavities for airflow between the motor cavity and the piston cavity, such as the exhaust cavity of the piston. Since the refrigerant gas in different cavities or channels has different pressures and temperatures, in order to ensure the normal operation of the compressor, it is necessary to prevent the refrigerant gas in different cavities or channels from accidentally leaking, especially to prevent the cavity or channel where the high-temperature and high-pressure gas is located from leaking gas to the cavity or channel where the low-temperature and low-pressure gas is located.

[0004] In order to prevent accidental leakage of refrigerant gas in different cavities or channels, sealing structures are currently designed between different cavities or channels. For example, sealing rings are installed at the mating parts of multiple components between the motor cavity and the piston cavity. Although this can achieve a sealing protection effect, the number of components in the compressor is large and the assembly relationship is complex, resulting in a large number of sealing rings and complex and diverse installation positions, which increases the difficulty of installation and maintenance of the compressor.

[0005] In summary, how to simplify the sealing design of different cavities or channels of the compressor, such as the motor cavity and the piston cavity, has become an urgent problem to be solved by those skilled in the art. Utility Model Content

[0006] The purpose of the present application is to provide a compressor that can simplify the sealing design of the compressor at different cavities or channels such as a motor cavity and a piston cavity.

[0007] To achieve the above-mentioned purpose, the present application provides a compressor, including a casing, a main bearing and a muffler; an annular convex portion is provided in the casing, the annular convex portion extends into a ring along the circumference of the casing and protrudes radially inward; a compression chamber is provided on one axial side of the annular convex portion, and a motor chamber is provided on the other axial side; the muffler is abutted against the side of the main bearing facing the motor chamber, and surrounds to form an exhaust chamber; the working air pressures of the compression chamber and the exhaust chamber are both greater than the working air pressure of the motor chamber; a local surface of the muffler is located between the motor chamber and the exhaust chamber and is arranged in cooperation with the annular convex portion, and a sealing member is provided at the cooperation position to construct a sealing gap.

[0008] In some embodiments, the muffler includes a first surface abutting against the main bearing; the main bearing includes a second surface abutting against the casing; the mating parts of the first surface and the second surface are both constructed as installation gaps without sealing members.

[0009] In some embodiments, the muffler further includes a third surface; the first surface and the third surface both face the main bearing, and the third surface is separated from the surface of the main bearing and surrounds and forms an exhaust cavity.

[0010] In some embodiments, the annular protrusion and the housing are integrally formed; a portion of the second surface is in contact with the annular protrusion and the remaining portion is in contact with the inner wall of the housing except the annular protrusion.

[0011] In some embodiments, the second surface includes a main bearing end mounting surface and a main bearing peripheral mounting surface; the main bearing end mounting surface is attached to the side of the annular protrusion facing the compression chamber, and the main bearing peripheral mounting surface is attached to the inner wall of the casing except the annular protrusion.

[0012] In some embodiments, the fitting clearance of the fitting portion where the main bearing end mounting surface is located is smaller than the fitting clearance of the fitting portion where the main bearing circumferential mounting surface is located.

[0013] In some embodiments, the muffler is nested in the annular protrusion; the outer circumference of the muffler and the inner circumference of the annular protrusion fit each other.

[0014] In some embodiments, the width of the mating portion between the muffler and the annular protrusion is not less than the width of the inner circumferential surface of the annular protrusion.

[0015] In some embodiments, a first sealing groove is provided on the outer peripheral surface of the muffler; a sealing member is filled in the first sealing groove.

[0016] In some embodiments, it also includes a main shaft; a shaft sleeve portion is provided in the middle of the main bearing, the main shaft is passed through and the fixed axis is hinged to the shaft sleeve portion; the muffler is in the shape of a ring cover, the inner circumferential surface sealing sleeve of the muffler is provided on the shaft sleeve portion, and the inner circumferential surface of the muffler is provided with a second sealing groove; the second sealing groove is filled with a sealing member.

[0017] Compared with the prior art, this application has at least the following beneficial effects:

[0018] The compressor provided in the present application includes a casing, a main bearing and a muffler; an annular convex portion is provided in the casing, the annular convex portion extends into a ring along the circumference of the casing and protrudes radially inward; a compression chamber is provided on one axial side of the annular convex portion, and a motor chamber is provided on the other axial side; the muffler is abutted against the side of the main bearing facing the motor chamber, and surrounds the exhaust chamber to form a gas chamber; the working air pressures of the compression chamber and the exhaust chamber are both greater than the working air pressure of the motor chamber; a local surface of the muffler is located between the motor chamber and the exhaust chamber and is arranged in cooperation with the annular convex portion, and a sealing member is provided at the cooperation position to construct a sealing gap.

[0019] The compressor provided in the present application rationally designs the installation relationship among the annular protrusion, the muffler and the main bearing, and arranges a seal at the mating position between the muffler and the annular protrusion, so that the mating position between the muffler and the annular protrusion is constructed to form a sealing gap, so that the aforementioned sealing gap is located on the gas leakage path between the compression chamber and the motor chamber, and also on the gas leakage path between the exhaust chamber and the motor chamber, so that the same sealing gap is used to seal and protect the two gas leakage paths of the compression chamber and the motor chamber, and the exhaust chamber and the motor chamber, which is beneficial to reducing the number of sealing structures in the compressor, facilitating the adjustment of the seal to a muffler with smaller size, lighter weight and less installation difficulty, and also beneficial to simplifying the inspection and maintenance of the sealing gap and its seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0021] Figure 1 A schematic diagram of the structure of a compressor provided in an embodiment of the present application;

[0022] Figure 2 for Figure 1 A detailed enlargement of the main bearing, muffler and annular boss.

[0023] in,

[0024] 1- housing, 11- annular convex part,

[0025] 2-main bearing, 21-second surface, 211-main bearing end mounting surface, 212-main bearing peripheral mounting surface, 22-shaft sleeve portion,

[0026] 3-muffler, 31-first surface, 32-third surface, 33-first sealing groove, 34-second sealing groove,

[0027] 4- compression chamber, 5- motor chamber, 6- exhaust chamber, 7- seal, 8- main shaft, 9- motor, 10- compression assembly. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0029] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0030] Please refer to Figure 1 and Figure 2 , Figure 1 A schematic diagram of the structure of a compressor provided in an embodiment of the present application; Figure 2 for Figure 1 A detailed enlargement of the main bearing, muffler and annular boss.

[0031] For reference Figure 1 and Figure 2 The present application provides a compressor, comprising a casing 1, a main bearing 2 and a muffler 3; an annular convex portion 11 is provided in the casing 1, and the annular convex portion 11 extends into a ring along the circumference of the casing 1 and protrudes inwardly along the radial direction of the casing 1; the cavity in the casing 1 comprises a compression chamber 4 and a motor chamber 5, the compression chamber 4 is provided on one axial side of the annular convex portion 11, and can be used to install a compression assembly 10, and the motor chamber 5 is provided on the other axial side of the annular convex portion 11, and can be used to install a motor 9; the main bearing 2 and the muffler 3 are both installed in the casing 1; the muffler 3 is abutted against a side of the main bearing 2 facing the motor chamber 5, and the abutting portion of the two can surround and form an exhaust chamber 6; a partial surface of the muffler 3 is between the motor chamber 5 and the exhaust chamber 6, the aforementioned surface of the muffler 3 is matched with the annular convex portion 11 and a sealing member 7 is provided at the matching portion, so that the aforementioned matching portion is constructed as a sealing gap.

[0032] In this embodiment, the working air pressure of the compression chamber 4 and the working air pressure of the exhaust chamber 6 are both greater than the working air pressure of the motor chamber 5. For example, the motor chamber 5 is connected to the air inlet of the housing 1, and the working air pressure of the motor chamber 5 is equal to the air inlet pressure of the compressor, which is usually equal to the atmospheric pressure; the compression chamber 4 is connected to the exhaust port of the housing 1, and the working air pressure of the motor chamber 5 is equal to the exhaust pressure of the compressor. Since the compressor is a fluid machine that increases low-pressure gas to high-pressure gas, the exhaust pressure is significantly greater than the intake pressure. Accordingly, the working air pressure of the compression chamber 4 is greater than the working air pressure of the motor chamber 5. The muffler 3 and the main bearing 2 surround the exhaust chamber 6 at the contacting part of the two. The exhaust chamber 6 forms a connected air path with the compression assembly 10, or in other words, the exhaust chamber 6 can be regarded as the cavity of the compression assembly 10, which is used to meet the exhaust requirements of the compression assembly 10. Since the compression assembly 10 can compress the gas to do work, the air pressure of the gas flowing through the compression assembly 10 is greater than the intake air pressure of the compressor. Correspondingly, the working air pressure of the exhaust chamber 6 is also greater than the working air pressure of the motor chamber 5. For the compression chamber 4 and the exhaust chamber 6, usually, the gas flowing out of the exhaust chamber 6 flows through the oil separator and diffuses into the compression chamber 4, so the air pressure of the exhaust chamber 6 is equal to or slightly greater than the air pressure of the compression chamber 4.

[0033] Based on the relationship between the working air pressures of the compression chamber 4, the exhaust chamber 6 and the motor chamber 5, the compressor may have at least two gas leaks: ① The gas in the compression chamber 4 may leak toward the motor chamber 5; ② The gas in the exhaust chamber 6 may leak toward the motor chamber 5. The above two leaks will seriously affect the working efficiency of the compressor, so it is necessary to design a seal for the above two positions. To this end, this embodiment designs an annular convex portion 11, and reasonably adjusts the installation relationship between the annular convex portion 11, the muffler 3 and the main bearing 2. The relevant settings are as follows:

[0034] (i) A compression chamber 4 is arranged on one axial side of the annular protrusion 11, and a motor chamber 5 is arranged on the other axial side of the annular protrusion 11. It can be seen that the compression chamber 4 and the motor chamber 5 are respectively arranged at the two axial ends of the annular protrusion 11; at the same time, the muffler 3 is abutted against the side of the main bearing 2 facing the motor chamber 5, and the muffler 3 and the main bearing 2 are surrounded by an exhaust chamber 6 at the abutting position of the two. It can be seen that, viewed along the axial direction of the annular protrusion 11, the muffler 3 is located between the motor chamber 5 and the main bearing 2, the main bearing 2 is located between the muffler 3 and the compression chamber 4, and the exhaust chamber 6 is located between the muffler 3 and the main bearing 2.

[0035] As can be seen from the above, the compression chamber 4, the main bearing 2, the muffler 3 and the motor chamber 5 are sequentially distributed along the axial direction of the annular convex portion 11. In addition, based on the molding method of the exhaust chamber 6, it can be seen that the contacting parts of the muffler 3 and the main bearing 2 can separate the motor chamber 5 and the exhaust chamber 6, and of course, the compression chamber 4 and the exhaust chamber 6 can also be separated.

[0036] (ii) A partial surface of the muffler 3 is located between the motor chamber 5 and the exhaust chamber 6 and is arranged in cooperation with the annular convex portion 11. The sealing member 7 is arranged at the cooperation position and can be constructed as a sealing gap. It can be seen that a partial surface of the muffler 3 is arranged in cooperation with the annular convex portion 11. Then, in combination with the above point (i), it can be known that a partial surface of the muffler 3 is in contact with the main bearing 2 and a partial surface is arranged in cooperation with the annular convex portion 11.

[0037] For the convenience of description, the following text will regard the surface of the silencer that is in contact with the main bearing 2 as the first silencer surface, and the surface of the silencer that is arranged in cooperation with the annular protrusion 11 as the second silencer surface. Obviously, the first silencer surface and the second silencer surface are two different surfaces of the silencer 3. According to the above point (a), the compression chamber 4, the main bearing 2, the silencer 3 and the motor chamber 5 are distributed in sequence along the axial direction of the annular protrusion 11, wherein the first silencer surface of the silencer 3 faces the main bearing 2 and the compression chamber 4, and the second silencer surface of the silencer 3 is arranged in cooperation with the annular protrusion 11. The following is divided into two situations to explain the relative position relationship between the first silencer surface and the second silencer surface in the three chambers of the compression chamber 4, the motor chamber 5 and the exhaust chamber 6:

[0038] Assuming that the second muffler surface and the first muffler surface are on different sides of the muffler 3, the first muffler surface facing the main bearing 2 and the compression chamber 4 is closer to the main bearing 2 and the compression chamber 4 than other surfaces of the muffler 3, that is, the first muffler surface is closer to the main bearing 2 and the compression chamber 4 than the second muffler surface, in other words, the second muffler surface is closer to the motor chamber 5 than the first muffler surface. It can be seen that along the axial direction of the annular convex portion 11, the compression chamber 4, the main bearing 2, the first muffler surface, the second muffler surface and the motor chamber 5 are distributed in sequence; wherein, since the second muffler surface and the annular convex portion 11 are cooperatively set as a sealing gap, the distribution position of the second muffler surface in the aforementioned positional relationship can be equivalent to the distribution position of the sealing gap in the aforementioned positional relationship, and it can be seen that the sealing gap is between the compression chamber 4 and the motor chamber 5 along the axial direction of the annular convex portion 11. In addition, the exhaust chamber 6 is located between the main bearing 2 and the first muffler surface, and naturally between the main bearing 2 and the second muffler surface. It is known that the position of the second muffler surface can be equivalent to the position of the sealing gap. Then, the sealing gap is located between the exhaust chamber 6 and the motor chamber 5 along the axial direction of the annular protrusion 11.

[0039] Assuming that the second muffler surface and the first muffler surface are on the same side of the muffler 3, considering the arrangement of the annular convex portion 11 in the housing 1 and the molding of the exhaust chamber 6, it can be known that the second muffler surface is outside the exhaust chamber 6 and is also outside the contact area between the main bearing 2 and the muffler 3, so that the second muffler surface and the annular convex portion 11 can be arranged in coordination. It can be seen that the coordination area between the second muffler surface and the annular convex portion 11, the contact area between the main bearing 2 and the muffler 3, and the exhaust chamber 6 are distributed in sequence from the outside to the inside. Since the muffler 3 is located between the motor chamber 5 and the main bearing 2, from the side of the motor chamber 5, the motor chamber 5, the coordination area between the second muffler surface and the annular convex portion 11, the contact area between the main bearing 2 and the muffler 3, and the exhaust chamber 6 are distributed in sequence from the outside to the inside. Among them, the matching part between the second muffler surface and the annular convex part 11 is the sealing gap, therefore, the motor chamber 5, the sealing gap, the contact part between the main bearing 2 and the muffler 3, and the exhaust chamber 6 are distributed in sequence from the outside to the inside. It should be noted that the aforementioned "inside" and "outside" can be understood as: radiating from the exhaust chamber 6 as the midpoint to the surroundings, the closer to the exhaust chamber 6, the closer to the inside, and the farther away from the exhaust chamber 6, the closer to the outside.

[0040] In addition, when the second muffler surface and the first muffler surface are on the same side of the muffler 3, for the compression chamber 4 and the motor chamber 5, the position of the first muffler surface can be equivalent to the position of the second muffler surface along the axial direction of the annular convex portion 11, and both can be uniformly marked with the position of the muffler 3, so the compression chamber 4, the main bearing 2, the muffler 3 and the motor chamber 5 are distributed in sequence along the axial direction of the annular convex portion 11. Among them, since the second muffler surface and the annular convex portion 11 are matched to form a sealing gap, and the compression chamber 4 and the motor chamber 5 are respectively located at the axial ends of the annular convex portion 11, the aforementioned sealing gap is located between the compression chamber 4 and the motor chamber 5 along the axial direction of the annular convex portion 11.

[0041] According to the above analysis, in this embodiment: (1) the compression chamber 4, the main bearing 2, the muffler 3 and the motor chamber 5 are distributed in sequence along the axial direction of the annular protrusion 11; (2) the contact area between the muffler 3 and the main bearing 2 can separate the motor chamber 5 and the exhaust chamber 6, and the contact area between the muffler 3 and the main bearing 2 can also separate the compression chamber 4 and the exhaust chamber 6; (3) regardless of whether the second muffler surface and the first muffler surface are on the same side or different sides of the muffler 3, if the gas leaks from the compression chamber 4 to the motor chamber 5, the gas will flow through the compression chamber 4, the sealing gap and the motor chamber 5 in turn, and if the gas leaks from the exhaust chamber 6 to the motor chamber 5, the gas will flow through the exhaust chamber 6, the sealing gap and the motor chamber 5 in turn.

[0042] The compressor provided in the present application is provided with a seal 7 at the mating position of the muffler 3 and the annular protrusion 11, so that the aforementioned mating position is structured to form a sealing gap. This sealing gap is located on the gas leakage path between the compression chamber 4 and the motor chamber 5, and also on the gas leakage path between the exhaust chamber 6 and the motor chamber 5. Therefore, the aforementioned sealing gap can simultaneously perform sealing protection on the aforementioned two gas leakage paths. Conversely, the same sealing gap can be used to achieve sealing protection on the aforementioned two gas leakage paths. The same sealing gap and its inner sealing member 7 are used to seal and protect the two gas leakage paths, which is beneficial to reduce the number of sealing structures between multiple components such as the casing 1 and its annular protrusion 11, the main bearing 2 and the muffler 3. This also makes it possible to set the sealing member 7 only on the muffler 3 instead of the main bearing 2, so that the sealing member 7 is on the muffler 3 which is smaller in size, lighter in weight and less difficult to install, rather than on the main bearing 2 which is larger in size, heavier and more difficult to install. This is also beneficial to simplify the inspection and maintenance of the sealing gap and its sealing member 7. For example, multiple sealing members 7 can be set at the matching position of the muffler 3 and the annular protrusion 11 to provide multiple sealing protections. Since these sealing members 7 are all at the matching position of the muffler 3 and the annular protrusion 11, when inspecting the aforementioned multiple sealing protection structure, only the muffler 3 and the annular protrusion 11 can be disassembled without disassembling other components in the compressor.

[0043] The compressor provided in the present application is further described below in conjunction with the accompanying drawings and implementation examples.

[0044] For reference Figure 1 and Figure 2 In some embodiments, a muffler 3 and a main bearing 2 are provided in the compressor, the muffler 3 includes a first surface 31 abutting against the main bearing 2, the main bearing 2 includes a second surface 21 abutting against the casing 1, and the matching parts of the first surface 31 and the second surface 21 are both configured as installation gaps without a seal 7. Figure 2 As shown, Figure 2 The left partial surface of the middle muffler 3 can be regarded as the first surface 31, and the first surface 31 is close to the main bearing 2; the outer peripheral surface and the right partial surface of the main bearing 2 can be regarded as the second surface 21, the outer peripheral surface of the main bearing 2 is close to the housing 1, and the right partial surface of the main bearing 2 is close to the annular protrusion 11 of the housing 1, so the second surface 21 is close to the housing 1. In this embodiment, the matching part of the muffler 3 and the annular protrusion 11 is configured as a sealing gap provided with a sealing member 7, and the matching part where the first surface 31 is located and the matching part where the second surface 21 is located are both configured as installation gaps without a sealing member 7.

[0045] In the above embodiment, the matching part where the first surface 31 is located refers to the matching part between the first surface 31 and the main bearing 2, and the matching part where the second surface 21 is located refers to the matching part between the second surface 21 and the housing 1 and its annular protrusion 11. Although the matching part where the first surface 31 is located and the matching part where the second surface 21 is located are both configured as installation gaps without the seal 7, the aforementioned installation gaps can be designed as clearance fits or interference fits according to actual needs, thereby exerting a certain degree of sealing effect.

[0046] On the basis of the above embodiment, the muffler 3 has not only the first surface 31 but also the third surface 32; wherein the first surface 31 and the third surface 32 both face the main bearing 2, the first surface 31 is close to the main bearing 2, the third surface 32 is separated from the surface of the main bearing 2, and the third surface 32 and the surface of the main bearing 2 can surround and form an exhaust chamber 6. Figure 2 The first surface 31 and the third surface 32 are both arranged on the left side of the muffler 3 and facing the main bearing 2. The third surface 32 is recessed toward the inside of the muffler 3 relative to the first surface 31, and the first surface 31 is located on the peripheral side of the third surface 32. Therefore, when the first surface 31 is close to the main bearing 2, the third surface 32 is separated from the main bearing 2, and the third surface 32 and the right side surface of the main bearing 2 can surround and form an exhaust cavity 6. The specific shape, connection relationship, etc. of the exhaust cavity 6 can be referred to Figure 1 The functional principle of the exhaust chamber 6 can refer to the relevant prior art.

[0047] For reference Figure 1 and Figure 2 In some embodiments, the annular protrusion 11 and the casing 1 are integrally formed; the second surface 21 is not only in contact with the annular protrusion 11, but also in contact with the inner wall of the casing 1 except the annular protrusion 11, so as to increase the difficulty of gas leakage between the compression chamber 4 and the exhaust chamber 6, and between the compression chamber 4 and the motor chamber 5 as much as possible.

[0048] The second surface 21 may include a main bearing end mounting surface 211 and a main bearing peripheral mounting surface 212; wherein the main bearing end mounting surface 211 is attached to the side of the annular protrusion 11 facing the compression chamber 4, and the main bearing peripheral mounting surface 212 is attached to the inner wall of the casing 1 except the annular protrusion 11. Figure 2 The main bearing end mounting surface 211 is in contact with the left shaft end surface of the annular protrusion 11, and the main bearing peripheral mounting surface 212 is in contact with the upper part of the inner wall of the casing 1 adjacent to the left shaft end surface.

[0049] Generally, the fitting clearance of the fitting part where the main bearing end mounting surface 211 is located is smaller than the fitting clearance of the fitting part where the main bearing circumferential mounting surface 212 is located. In other words, the fitting clearance between the main bearing end mounting surface 211 and the annular protrusion 11 is smaller than the fitting clearance between the main bearing circumferential mounting surface 212 and the inner wall of the housing 1 other than the annular protrusion 11. This is conducive to reducing the difficulty of installing the main bearing 2. For example, if the fitting clearance of the fitting part where the main bearing circumferential mounting surface 212 is located is relatively small, it means that the main bearing circumferential mounting surface 212 and the inner wall of the housing 1 are squeezed too much, which makes it difficult for the main bearing 2 to be safely and accurately assembled to the target position in the housing 1. Not only does it require a sufficiently large external force, but there is also a great risk of damage to the main bearing 2 or the inner wall of the housing 1. On the contrary, if only the fitting clearance of the fitting part where the main bearing end mounting surface 211 is located is relatively small, then the operator can use power equipment to squeeze the main bearing 2 so that the main bearing 2 is inserted into the housing 1 as much as possible, thereby making the main bearing 2 and the shaft end of the annular protrusion 11 fit more closely.

[0050] like Figure 2 As shown, in some of the embodiments provided above, the muffler 3 is nested in the annular protrusion 11, at this time, the outer circumferential surface of the muffler 3 and the inner circumferential surface of the annular protrusion 11 fit each other, and the fitting part of the outer circumferential surface of the muffler 3 and the annular protrusion 11 is also the matching part of the muffler 3 and the annular protrusion 11, the outer circumferential surface of the muffler 3 and the inner circumferential surface of the annular protrusion 11 fit tightly, and the seal 7 is arranged between the outer circumferential surface of the muffler 3 and the inner circumferential surface of the annular protrusion 11, so that the outer circumferential surface of the muffler 3 and the inner circumferential surface of the annular protrusion 11 form a sealing gap that can exert a sealing protection effect.

[0051] For reference Figure 2, usually, the width of the matching part between the muffler 3 and the annular protrusion 11 is not less than the width of the inner circumference of the annular protrusion 11. The matching part between the muffler 3 and the annular protrusion 11 refers to the fitting part between the outer circumference of the muffler 3 and the inner circumference of the annular protrusion 11, and the fitting part is formed by the outer circumference of the muffler 3 and the inner circumference of the annular protrusion 11. Obviously, the width of either the outer circumference of the muffler 3 or the inner circumference of the annular protrusion 11 will not be less than the width of the fitting part. In other words, the width of the fitting part cannot be greater than the width of either the outer circumference of the muffler 3 or the inner circumference of the annular protrusion 11. In this embodiment, the width of the fitting part between the muffler 3 and the annular protrusion 11 is not less than the width of the inner circumference of the annular protrusion 11, which means that the width of the outer circumference of the muffler 3 is not less than the width of the inner circumference of the annular protrusion 11, and the entire inner circumference of the annular protrusion 11 is in contact with the outer circumference of the muffler 3. At this time, the width of the fitting part between the muffler 3 and the annular protrusion 11 is equal to the width of the inner circumference of the annular protrusion 11, and the width of the fitting part between the muffler 3 and the annular protrusion 11 is equal to or less than the width of the outer circumference of the muffler 3.

[0052] It can be seen that in the above embodiment, the annular protrusion 11 fully utilizes its inner circumference to limit and constrain the muffler 3, and then limits and constrains the main bearing 2 and the main shaft 8, so that the annular protrusion 11 plays a more effective role under the limited size of the annular protrusion 11. As for the muffler 3, its specific shape and specific size can be adjusted according to the installation relationship of other surrounding components.

[0053] In the above embodiment, the outer circumference of the muffler 3 is provided with a first sealing groove 33, and the first sealing groove 33 is filled with a sealing member 7. In this embodiment, the first sealing groove 33 is provided on the outer circumference of the muffler 3, so it is not necessary to groove the inner circumference of the annular convex portion 11, which is conducive to reducing the difficulty of processing the housing 1 and its annular convex portion 11. Compared with the housing 1 and its annular convex portion 11, the size, weight and processing difficulty of the muffler 3 are relatively small, which facilitates the processing of the first sealing groove 33 and is conducive to controlling the processing accuracy of the first sealing groove 33.

[0054] In some of the embodiments provided above, the compressor provided in the present application further includes a main shaft 8; the main shaft 8 is installed in the casing 1 through the main bearing 2 and the muffler 3, which can be referred to Figure 2 A shaft sleeve portion 22 is provided in the middle of the main bearing 2, the main shaft 8 is passed through and the fixed axis is hinged to the shaft sleeve portion 22, the muffler 3 is in the shape of a ring cover, the outer circumferential surface of the muffler 3 and the inner circumferential surface of the annular protrusion 11 fit each other, and the inner circumferential surface sealing sleeve of the muffler 3 is provided on the shaft sleeve portion 22. It can be seen that both the main bearing 2 and the muffler 3 are sleeved on the main shaft 8, and the muffler 3 is fixedly connected to the annular protrusion 11 of the casing 1, so that the main bearing 2 and the muffler 3 can jointly meet the installation requirements of the main shaft 8 in the casing 1.

[0055] In the above embodiment, the inner circumference of the muffler 3 is provided with a second sealing groove 34, and the second sealing groove 34 is filled with a sealing member 7. That is to say, the second sealing groove 34 and the inner sealing member 7 can be used to seal the inner circumference of the muffler 3 and the sleeve portion 22, thereby preventing the motor chamber 5 and the exhaust chamber 6 from leaking gas from the installation gap between the muffler 3 and the sleeve portion 22.

[0056] In summary, the compressor provided by the present application embeds the muffler 3 in the annular protrusion 11 of the casing 1, and abuts the main bearing 2 against the axial side of the annular protrusion 11. Based on the installation relationship among the annular protrusion 11, the muffler 3 and the main bearing 2, the two gas leakage paths of the compression chamber 4 and the motor chamber 5, and the exhaust chamber 6 and the motor chamber 5 are sealed and protected with the same sealing gap, which is beneficial to reduce the number of sealing structures in the compressor, facilitates the adjustment of the seal 7 to the muffler 3 with smaller size, lighter weight and less installation difficulty, and is also beneficial to simplify the inspection and maintenance of the sealing gap and its seal 7.

[0057] The compressor provided by the present application is introduced in detail above. The principles and implementation methods of the present application are described in this article using specific examples. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A compressor, characterized in that: The invention comprises a casing (1), a main bearing (2) and a muffler (3); an annular convex portion (11) is provided inside the casing (1), the annular convex portion (11) extends in a ring along the circumference of the casing (1) and protrudes radially inward; a compression chamber (4) is provided on one axial side of the annular convex portion (11), and a motor chamber (5) is provided on the other axial side; the muffler (3) is abutted against a side of the main bearing (2) facing the motor chamber (5) and surrounds the muffler to form an exhaust chamber (6); the working air pressures of the compression chamber (4) and the exhaust chamber (6) are both greater than the working air pressure of the motor chamber (5); a local surface of the muffler (3) is located between the motor chamber (5) and the exhaust chamber (6) and is arranged in cooperation with the annular convex portion (11), and a sealing member (7) is arranged at the cooperation position to form a sealing gap.

2. The compressor according to claim 1, characterized in that The muffler (3) comprises a first surface (31) abutting against the main bearing (2); the main bearing (2) comprises a second surface (21) abutting against the housing (1); the mating parts of the first surface (31) and the second surface (21) are both constructed as installation gaps without sealing elements (7).

3. The compressor according to claim 2, characterized in that The muffler (3) further comprises a third surface (32); the first surface (31) and the third surface (32) both face the main bearing (2), and the third surface (32) is separated from the surface of the main bearing (2) and surrounds the exhaust chamber (6).

4. The compressor according to claim 2, characterized in that The annular protrusion (11) and the housing (1) are integrally formed; a portion of the second surface (21) is in contact with the annular protrusion (11), and the remaining portion is in contact with the inner wall of the housing (1) other than the annular protrusion (11).

5. The compressor according to claim 4, characterized in that The second surface (21) comprises a main bearing end mounting surface (211) and a main bearing circumferential mounting surface (212); the main bearing end mounting surface (211) is in contact with the side of the annular protrusion (11) facing the compression chamber (4), and the main bearing circumferential mounting surface (212) is in contact with the inner wall of the casing (1) except the annular protrusion (11).

6. The compressor according to claim 5, characterized in that The fitting clearance of the fitting part where the main bearing end mounting surface (211) is located is smaller than the fitting clearance of the fitting part where the main bearing circumferential side mounting surface (212) is located.

7. The compressor according to any one of claims 1 to 6, characterized in that: The silencer (3) is nested in the annular convex portion (11); the outer circumferential surface of the silencer (3) and the inner circumferential surface of the annular convex portion (11) are in contact with each other.

8. The compressor according to claim 7, characterized in that The width of the matching portion between the muffler (3) and the annular protrusion (11) is not less than the width of the inner circumferential surface of the annular protrusion (11).

9. The compressor according to claim 7, characterized in that The outer peripheral surface of the muffler (3) is provided with a first sealing groove (33); a sealing member (7) is filled in the first sealing groove (33).

10. The compressor according to claim 9, characterized in that The invention also comprises a main shaft (8); a shaft sleeve portion (22) is provided in the middle of the main bearing (2), the main shaft (8) is passed through and is fixedly hinged to the shaft sleeve portion (22); the muffler (3) is in the shape of a ring cover, the inner peripheral surface sealing sleeve of the muffler (3) is provided on the shaft sleeve portion (22), and the inner peripheral surface of the muffler (3) is provided with a second sealing groove (34); the second sealing groove (34) is filled with a sealing member (7).

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