CN217029229U

CN217029229U - Sealing piece shell and sealing structure of compressor and compressor

Info

Publication number: CN217029229U
Application number: CN202220922665.8U
Authority: CN
Inventors: 江南山; 胡斌; 吴迪; 江亚红; 王继泉
Original assignee: Shanghai Nuotong New Energy Technology Co ltd
Current assignee: Shanghai Nuotong New Energy Technology Co ltd
Priority date: 2022-04-20
Filing date: 2022-04-20
Publication date: 2022-07-22
Anticipated expiration: 2032-04-20

Abstract

The embodiment of the application relates to the technical field of compressor sealing, in particular to a sealing element shell, a sealing structure and a compressor of the compressor, wherein the sealing element shell is arranged in a shell of the compressor and is sleeved on a main shaft of the compressor, an inner wall and an outer wall opposite to the inner wall are arranged around the axial direction of the main shaft, and an assembly gap is formed between the inner wall and the main shaft; the direction of the shell from the outer wall to the inner wall is provided with at least one inlet channel and at least one outlet channel, and the inlet channel is communicated with the outlet channel through an assembly gap. Compared with the prior art, the air filling device has the advantages that assembly gaps generated by assembling the sealing shell and the main shaft of the compressor can be continuously inflated through the air inlet channel arranged on the sealing shell, so that air filling is performed, air is discharged through the air outlet channel, and the isolation effect between the compression medium side and the bearing gear side is optimized.

Description

Sealing element shell and sealing structure of compressor and compressor

Technical Field

The embodiment of the utility model relates to the technical field of compressor sealing, in particular to a sealing piece shell and a sealing structure of a compressor and the compressor.

Background

The compressor is a driven fluid machine for lifting low-pressure gas into high-pressure gas, when the compressor is used, low-temperature low-pressure gas is sucked from the air suction pipe, the piston is driven by the operation of the motor to compress the low-temperature low-pressure gas, and then the high-temperature high-pressure gas is discharged to the air discharge pipe, so that power is provided for a refrigeration cycle.

In order to ensure the isolation effect between the compressed medium side and the bearing gear side, a sealing mechanism is assembled in some current compressors. The more commonly used seal structure now includes: sealing the shaft sleeve; the sealing shaft sleeve is sleeved on the compressor main shaft and is positioned between the compression medium side and the bearing gear side to seal the two sides.

However, the inventors found that, due to the machining accuracy, there is a fitting clearance between the seal sleeve and the compressor main shaft, which results in an undesirable effect of isolating the compression medium side from the bearing gear side, and easily causes a problem that the media on the compression medium side and the bearing gear side are mixed by the fitting clearance.

SUMMERY OF THE UTILITY MODEL

An object of an embodiment of the present invention is to design a sealing housing, a sealing structure, and a compressor of a compressor, which can prevent an assembly gap generated by assembling a main shaft of the compressor with the sealing housing from affecting an isolation between a compression medium side and a bearing gear side, so as to optimize an isolation effect between the compression medium side and the bearing gear side.

In order to achieve the above object, an embodiment of the present invention provides a sealing element casing of a compressor, where the sealing element casing is arranged in a shell of the compressor and is sleeved on a main shaft of the compressor, the sealing element casing has an inner wall and an outer wall opposite to the inner wall in a direction around an axis of the main shaft, and an assembly gap exists between the inner wall and the main shaft;

the casing is followed the outer wall extremely the direction of inner wall sets up an at least intake duct and an at least gas outlet duct, the intake duct with the gas outlet duct all with the fit-up gap intercommunication.

Furthermore, each air outlet channel is far away from any side of the air inlet channel along the axial direction of the main shaft.

Further, the venthole is equipped with many, at least one the venthole is followed the axis direction of main shaft is kept away from one of them one side of intake duct sets up, at least one the venthole is followed the axis direction of main shaft is kept away from the opposite side setting of intake duct.

Furthermore, at least two air inlet channels are arranged along the axial direction of the main shaft; at least one air outlet channel is arranged between every two adjacent air inlet channels.

Further, each of the air outlet channels and each of the air inlet channels are arranged perpendicular to the main shaft.

In addition, an embodiment of the present invention also provides a sealing structure of a compressor, including:

at least one seal;

a seal housing as described above; the sealing element is arranged in the sealing element shell and is sleeved on the main shaft.

The sealing elements are arranged in the axial direction of the main shaft, and each air inlet channel is located between any two adjacent sealing elements.

Wherein, the sealing member is a flexible sealing ring.

Wherein the inner wall is provided with an annular groove along the axial direction of the main shaft;

the number of the annular grooves is the same as that of the sealing elements, and the annular grooves and the sealing elements are arranged only correspondingly;

each sealing element is partially embedded in the only corresponding annular groove.

Wherein, still include: at least one outer seal;

the outer seal is sleeved on the outer wall and used for sealing the seal shell and the shell.

In addition, an embodiment of the present invention also provides a compressor, including:

a core having a main axis;

a housing inserted by the main shaft of the core and disposed coaxially with the main shaft; wherein the housing has an outer surface and an inner surface opposite to the outer surface around an axial direction of the main shaft;

a sealing structure as described above;

the shell is followed the surface extremely the direction of internal surface sets up at least one inlet port and at least one gas outlet, the quantity of inlet port with the quantity of intake duct is the same, and only corresponds the setting, the quantity of gas outlet with the quantity of gas outlet duct is the same, and only corresponds the setting, arbitrary one the inlet port sets up with only corresponding the intake duct intercommunication, arbitrary one the gas outlet sets up with only corresponding the gas outlet duct intercommunication.

Compared with the prior art, the embodiment of the utility model has the advantages that the air inlet channel and the air outlet channel are formed in the sealing element shell, when the sealing element shell is sleeved on the main shaft of the compressor, the air inlet channel and the air outlet channel can be communicated through the assembly gap generated between the sealing element shell and the main shaft, and in practical application, air is continuously injected into the assembly gap through the air inlet channel, so that the air can quickly fill the whole assembly gap, the compression medium side and the bearing gear side of the compressor are effectively isolated, a better isolation effect is realized, the overall sealing performance of the compressor is improved, the air injected into the assembly gap can be discharged through the air outlet channel, and the phenomenon that the air injected into the assembly gap is blown into the compression medium side to influence the purity of the compression medium is avoided.

Drawings

In order to more clearly describe the embodiments of the present application, a brief description will be given below of the relevant drawings. It is to be understood that the drawings in the following description are only intended to illustrate some embodiments of the present application, and that a person skilled in the art may also derive from these drawings many other technical features and connections etc. not mentioned herein.

Fig. 1 is a schematic view illustrating the assembly of a seal housing and a spindle according to a first embodiment of the present invention.

Fig. 2 is a partially enlarged view of a portion a in fig. 1 according to the first embodiment of the present invention.

Fig. 3 is a schematic diagram illustrating a position relationship between the inlet and the outlet in the first embodiment of the present invention.

Fig. 4 is a schematic diagram illustrating a positional relationship between a plurality of inlet channels and a plurality of outlet channels according to a first embodiment of the present invention.

Fig. 5 is a schematic view illustrating the assembly of a sealing member and a sealing member housing according to a second embodiment of the present invention.

FIG. 6 is a schematic view of the assembly of the outer seal with the seal housing in a second embodiment of the present invention.

Fig. 7 is a partially enlarged view of a portion B in fig. 6 according to a second embodiment of the present invention.

FIG. 8 is a schematic view of the compressor housing assembled with a sealing structure according to a third embodiment of the present invention.

The reference numerals and names in the figures are as follows:

11. a seal housing; 12. a housing; 13. a main shaft; 14. assembling gaps; 21. a seal member; 22. an outer seal;

111. an inner wall; 112. an outer wall; 113. an air inlet channel; 114. an air outlet channel; 121. an outer surface; 122. an inner surface; 123. an inlet port; 124. an air outlet; 1111. an annular groove;

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that numerous technical details are set forth in order to provide a better understanding of the present application in various embodiments of the present invention. However, the technical solution claimed in the present application can be implemented without these technical details and various changes and modifications based on the following embodiments.

Implementation mode one

As shown in fig. 1 and 2, the seal housing 11 is provided in a casing 12 of the compressor, and has an inner wall 111 and an outer wall 112 opposed to the inner wall around an axial direction of a main shaft 13, and the inner wall 111 is fitted to the main shaft 13 of the compressor. Between the inner wall 111 and the main shaft 13 of the compressor, there is a fitting gap 14 for reasons of machining accuracy. The fitting clearance 14 occurs in the housing 12 in the axial direction of the main shaft 13, and therefore affects the effect of isolating the compression medium side and the bearing gear side from each other.

In order to avoid the influence of the fitting gap 14 on the effect of isolating the compression medium side from the bearing gear side, the sealing performance between the compression medium side and the bearing gear side is improved, and the media in the compression medium side and the bearing gear side are prevented from being mixed in series through the fitting gap 14. As shown in fig. 1, at least one inlet duct 113 and at least one outlet duct 114 are provided in the direction from the outer wall 112 to the inner wall 111 of the seal housing 11, and the inlet duct 113 and the outlet duct 114 communicate with the fitting clearance 14. The intake duct 113 is constantly filled with air for filling the fitting gap 14, and the air gradually fills the fitting gap 14 to improve the isolation effect between the compression medium side and the bearing gear side. And the filling gas is continuously discharged through the gas outlet channel 114, thereby avoiding the communication and mixing of media in the compression medium side and the bearing gear side, and realizing better isolation effect between the compression medium side and the bearing gear side.

Specifically, as shown in fig. 1, each of the gas outlet passages 114 is provided away from either side of the gas inlet passage 113 in the axial direction of the main shaft 13 for discharging the gas in the fitting clearance 14. A passage is formed through which gas enters the fitting clearance 14 from the inlet passage 113 and exits the fitting clearance 14 from the outlet passage 114. This arrangement can guide the gas to be discharged from the fitting gap 14 at a constant speed during the period in which the fitting gap 14 is filled with the gas from the gas inlet 113, thereby preventing the gas from flowing to the compressed medium side and the bearing gear side, and also can ensure that the gas pressures on the compressed medium side and the bearing gear side are balanced with the atmospheric pressure outside, thereby preventing the gas from flowing back to the gas inlet 113 or entering the compressed medium side and the bearing gear side.

In addition, as shown in fig. 3, preferably, in order to further improve the purity of the compressed medium on the compressed medium side, a plurality of outlet channels 114 may be provided, and at least one outlet channel 114 is provided away from one side of the inlet channel 113 in the axial direction of the main shaft 13, and at least one outlet channel 114 is provided away from the other side of the inlet channel in the axial direction of the main shaft 13. By arranging the plurality of gas outlet channels 114, the discharge rate of gas from the gas outlet channels 114 can be increased, the pressure regulation range of the gas outlet channels 114 to the assembly gap 14 is enlarged, and the problems that gas flows to the compression medium side and the bearing gear side or the gas flows back to the gas inlet channel 113 are further avoided. In practical application, the gas entering the assembly gap 14 is continuously discharged from the outlet channels 114 on both sides of the inlet channel 113, so that dynamic supplement of the inlet channel 113 continuously charging the assembly gap 14 is satisfied.

As another preferable mode, as shown in fig. 4, at least two inlet channels 113 are provided along the axial direction of the main shaft 13 on the compression medium side and the bearing gear side, and at least not less than one outlet channel 114 is provided between each adjacent two inlet channels 113. The plurality of air inlets 113 can fill the assembly gap 14 with air relatively quickly, and ensure that the air filled in the assembly gap 14 has a certain pressure, so that the compressed medium on the compressed medium side can provide air with sufficient pressure to the movement process of the assembly gap 14, and the compressed medium is prevented from entering the assembly gap 14. And all be provided with between the adjacent inlet duct 113 and be no less than an outlet duct 114, guaranteed that when sealing member casing 11 is longer, or inlet velocity is very fast for inlet duct 113, still can be through setting up the gas outlet duct 114 exhaust gas between adjacent inlet duct 113, guarantee that the inside atmospheric pressure of compression medium side and bearing gear side is even. In practical applications, negative pressure often occurs on the compression medium side. At this time, in order to ensure the purity of the compressed medium on the compressed medium side, the compressed medium is introduced into the first inlet 113 adjacent to the compressed medium side at a pressure higher than atmospheric pressure, and the gas is introduced into the other inlet 113. Since the compressed medium introduced from the first inlet 113 has a higher introduction pressure than the gas introduced from the other inlet 113, a part of the compressed medium moves toward the compressed medium side and the other part moves away from the compressed medium side in the fitting clearance 14 and is discharged from the outlet channel 114. This also ensures the purity of the compressed medium on the compressed medium side.

In addition, it is worth mentioning that, in the present embodiment, each of the outlet channels 114 and each of the inlet channels 113 are disposed perpendicular to the main shaft 13. By the arrangement mode, the shortest distance between each air outlet channel 114 and each air inlet channel 113 to the assembly gap 14 can be ensured, and the air inlet and outlet efficiency of each air outlet channel 114 and each air inlet channel 113 is the highest.

Example two

A second embodiment of the present invention relates to a seal structure, as shown in fig. 5, including: at least one seal 21, and a seal housing 11 as described in the first embodiment.

The sealing member 21 is disposed in the sealing member housing 11 and is sleeved on the main shaft 13. The seal 21 is located between the main shaft 13 and the inner wall 111 for partially further filling the assembly gap 14 in cooperation with the seal housing 11 to improve the insulation effect on the compression medium side and the bearing gear side.

More specifically, as shown in fig. 5, a plurality of seals 21 are provided along the axial direction of the main shaft 13, and each intake duct 113 is located between any adjacent two seals 21. In short, at least two seal members 21 are provided in all the seal members 21 in the axial direction of the main shaft 13, and each intake duct 113 is provided between the two seal members 21. The gas entering the fitting clearance 14 from the inlet duct 113 is blocked by the sealing members 21 on both sides of the inlet duct 113, and is isolated from the compression medium side and the bearing gear side.

In addition, when the sealing member 21 is a sealing ring, the sealing member 21 may be a flexible sealing ring. The principle of the flexible sealing ring is that the flexible sealing ring deforms by extrusion between the main shaft 13 and the inner wall 111, and further achieves the effect of being assembled with the assembling gap 14 more tightly. And because of the good elasticity of the elastic rubber, the elastic rubber can be used for a long time without being damaged by the working environment.

In order to allow the packing 21 to be stably fitted into the packing housing 11, as shown in fig. 6 and 7, the inner wall 111 may have an annular groove 1111 in the axial direction of the main shaft. The number of the annular grooves 1111 is the same as that of the sealing elements, and the annular grooves 1111 are arranged only correspondingly. The sealing member 21 is positioned and fixed by the position of the annular groove 1111 when it is installed. The arrangement ensures that the sealing element 21 and the sealing element shell 11 are assembled quickly, cannot be easily displaced and has better sealing effect.

In order to ensure the sealing performance between the seal housing 11 and the housing 12 when the seal housing 11 and the housing 12 are mounted, the sealing structure may further include: at least one outer seal 22, wherein the outer seal 22 is sleeved to the outer wall 112. In this embodiment, the outer seal 22 is an O-ring seal. However, other sealing components may be used in practical applications, and in the present embodiment, the type of the outer seal 22 is not particularly limited.

EXAMPLE III

A third embodiment of the present invention relates to a compressor, as shown in fig. 8, which may include: a core and a sealing structure as described in the second embodiment. Wherein the core has a main shaft 13 and is assembled with the main shaft 13 inserted into the housing 12. The housing is provided coaxially with the main shaft 13, and has an outer surface 121 and an inner surface 122 opposed to the outer surface 121 around the axial direction of the main shaft 13. In order to facilitate the communication between the inlet channels 113 and the outlet channels 114, at least one inlet port 123 and at least one outlet port 124 are disposed in a direction from the outer surface 121 to the inner surface 122 of the casing 12, the number of the inlet ports 123 is the same as that of the inlet channels 113 and is uniquely corresponding to that of the inlet channels, and the number of the outlet ports 124 is the same as that of the outlet channels 114 and is uniquely corresponding to that of the outlet channels 114. Any one of the inlet ports 123 is communicated with the inlet channel 113 which is arranged only correspondingly, and any one of the outlet ports 124 is communicated with the outlet channel 114 which is arranged only correspondingly. In actual use, the air inlet channel 113 can be inflated through the air inlet 123 exposed on the outer surface 121, and the air discharged from the air outlet channel 114 can be collected through the air outlet 124 exposed on the outer surface 121, so that the problems of environmental pollution and the like are avoided.

It will be evident to those skilled in the art that the present application is not limited to the details of the foregoing illustrative embodiments, and that the present application may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. A sealing element shell of a compressor is arranged in a shell of the compressor and is sleeved on a main shaft of the compressor, and the sealing element shell is characterized in that the sealing element shell is provided with an inner wall and an outer wall opposite to the inner wall in the axial direction of the main shaft, and an assembly gap is formed between the inner wall and the main shaft;

the sealing element casing is followed the outer wall extremely the direction of inner wall sets up at least one intake duct and at least one gas outlet duct, the intake duct with the gas outlet duct all with the fit-up gap intercommunication.

2. The seal housing of a compressor of claim 1, wherein each of said outlet channels is disposed away from either side of said inlet channel in the direction of the axis of said main shaft.

3. The compressor seal housing of claim 2, wherein the outlet channel is provided with a plurality of outlet channels, at least one of the outlet channels is disposed along one side of the main shaft away from the inlet channel, and at least one of the outlet channels is disposed along the other side of the main shaft away from the inlet channel.

4. The seal housing of a compressor according to claim 3, wherein the inlet passage is provided with at least two in an axial direction of the main shaft; every two adjacent sets up between the intake duct and is no less than one the gas outlet channel.

5. The seal housing of a compressor according to any one of claims 1 to 4, wherein each of said outlet passages and each of said inlet passages are arranged perpendicular to said main axis.

6. A sealing structure of a compressor, comprising:

at least one seal;

the seal housing of any one of claims 1-5; the sealing element is arranged in the sealing element shell and is sleeved on the main shaft.

7. The sealing structure of a compressor according to claim 6, wherein a plurality of the sealing members are provided along the axial direction of the main shaft, and each of the inlet passages is located between any adjacent two of the sealing members.

8. A sealing structure of a compressor according to claim 6, wherein the sealing member is a flexible gasket.

9. The sealing structure of a compressor according to claim 6, wherein said inner wall has an annular groove in an axial direction of said main shaft; the number of the annular grooves is the same as that of the sealing elements, and the annular grooves are only arranged correspondingly;

10. A sealing structure of a compressor according to claim 6, further comprising: at least one outer seal;

11. A compressor, comprising:

a core having a main axis;

a housing inserted by the main shaft of the core body and disposed coaxially with the main shaft; wherein the housing has an outer surface and an inner surface opposite to the outer surface around an axial direction of the main shaft;

a sealing structure according to any one of claims 6-10;

wherein, the shell is followed the surface extremely the direction of internal surface sets up at least one inlet port and at least one gas outlet, inlet port's quantity with the quantity of intake duct is the same, and only corresponds the setting, the quantity of gas outlet with the quantity of ventiduct is the same, and only corresponds the setting, arbitrary one inlet port and only correspond the setting the intake duct intercommunication, arbitrary one the gas outlet corresponds the setting with only the ventiduct intercommunication.