CN211623805U - Sealing member, compressor and air conditioning unit - Google Patents
Sealing member, compressor and air conditioning unit Download PDFInfo
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- CN211623805U CN211623805U CN201922285971.6U CN201922285971U CN211623805U CN 211623805 U CN211623805 U CN 211623805U CN 201922285971 U CN201922285971 U CN 201922285971U CN 211623805 U CN211623805 U CN 211623805U
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- 238000007789 sealing Methods 0.000 title claims abstract description 128
- 238000004378 air conditioning Methods 0.000 title claims abstract description 12
- 244000126211 Hericium coralloides Species 0.000 claims description 12
- 238000001816 cooling Methods 0.000 abstract description 7
- 239000003507 refrigerant Substances 0.000 description 15
- 239000007788 liquid Substances 0.000 description 9
- 239000010687 lubricating oil Substances 0.000 description 6
- 239000003921 oil Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000011148 porous material Substances 0.000 description 3
- 238000005461 lubrication Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000002826 coolant Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000010726 refrigerant oil Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
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Abstract
The application provides a sealing member, a compressor and an air conditioning unit. The sealing element comprises a sealing element body, wherein a radial sealing hole structure matched with a motor shaft is formed in the sealing element body, and the radial sealing hole structure is used for sealing a gap between the sealing element body and the motor shaft. Besides, an axial sealing platform structure matched with the end face of the impeller is formed on the sealing element body, and the axial sealing platform structure is used for sealing a gap between the sealing element body and the end face of the impeller. Use the technical scheme of the utility model, can realize radial axial double seal, solve and let out the problem that the leakage rate is big when adopting radial seal alone, avoid because let out the problem that the impeller efficiency that the leakage rate is big and lead to can't further promote, the operation efficiency of promotion compressor that can furthest. Meanwhile, the problems of oil leakage, insufficient cooling and the like caused by large leakage of a shafting can be avoided, and the running reliability of the compressor is greatly improved.
Description
Technical Field
The utility model relates to a compressor technical field particularly, relates to a sealing member and compressor and air conditioning unit.
Background
In the centrifugal compressor, there are a region where the impeller rotates and compresses a gaseous refrigerant to do work, a region where the bearing is lubricated and cooled, and a region where the motor rotates to do work and a region where the motor is cooled, and each region is generally isolated and sealed by a certain measure. For example, when the bearing is cooled by using lubricating oil and the motor is cooled by using a liquid refrigerant, effective sealing measures must be adopted among the bearing, the motor and the impeller on the whole shaft system to prevent the lubricating oil from entering the areas of the impeller and the motor along the axial direction of the rotating shaft, so that the reliability problems of oil leakage and the like are avoided; meanwhile, the gaseous refrigerant on the side of the impeller is prevented from leaking to a bearing or a motor area along the axial direction of the rotating shaft, and the performance problems of low energy efficiency and the like are avoided.
In order to prevent various reliability problems and performance problems of the centrifugal compressor, it is necessary to seal various regions of the centrifugal compressor shaft system. Because the rotational speed of the centrifugal compressor is very high, there is certain interval between sealing element and the high-speed rotatory rotor generally, prevent to bump between stationary part and the movable part.
In the current centrifugal compressor, the sealing of each area on the shaft system is generally realized by adopting the parts of a labyrinth sealing structure, and the sealing is basically radial. Because the shaft seal structure of the radial seal is simple, the processing is easy to realize, and when the requirements on the reliability and the performance are not very high, the shaft seal structure adopting the radial seal can meet the requirements.
However, when the requirements for reliability and performance are high in different plants, the shaft seal structure of the single radial seal may not meet the requirement for leakage amount, so that the reliability and performance of the centrifugal compressor cannot be further improved.
Specifically, fig. 1 shows a shaft seal structure for single radial sealing of a conventional centrifugal compressor. It can be seen from the figure that, when the centrifugal compressor is in operation, the first-stage impeller 2, the support sleeve 3, the second-stage impeller 4 and the motor shaft 6 form an integral shaft system rotating at a high speed, the comb tooth sealing member 5 is a static member and is fixed on the base 1 of the compressor, wherein the comb tooth form of the comb tooth sealing adopts a labyrinth sealing mode, and the comb teeth of the comb tooth sealing member 5 realize the sealing of an independent radial surface. Although the comb seal 5 can achieve a good sealing effect in the radial direction of the motor shaft 6, it does not have a good sealing effect in the axial direction, and thus the reliability and performance of the centrifugal compressor cannot be further improved.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a sealing member and compressor and air conditioning unit to solve the not enough technical problem of sealing performance that the sealing member that the compressor used among the prior art exists.
The embodiment of the application provides a sealing member, including the sealing member body, be formed with on the sealing member body and be used for with motor shaft matched with radial seal pore structure, radial seal pore structure is used for the gap between sealing member body and the motor shaft, still is formed with the axial seal platform structure that is used for matching with the terminal surface of impeller on the sealing member body, the axial seal platform structure is used for the clearance between the terminal surface of sealed sealing member body and impeller.
In one embodiment, the axial seal land is structurally formed with a first seal groove in the form of a first comb tooth that mates with an end face of the impeller.
In one embodiment, the first seal groove is in the form of a labyrinth seal.
In one embodiment, the radial seal bore structure is formed with a second seal groove in the form of a second comb tooth.
In one embodiment, the second seal groove is in the form of a labyrinth seal.
In one embodiment, the axial sealing land structure is a bevel structure or a vertical surface structure.
The application also provides a compressor, which comprises a sealing element, wherein the sealing element is the compressor.
In one embodiment, a compressor includes: a compressor base; a motor shaft rotatably installed in the compressor base; the impeller is arranged on a motor shaft; the sealing element is sleeved on the motor shaft through the radial sealing hole structure and matched with the end face of the impeller through the axial sealing platform structure.
In one embodiment, the impeller comprises a first-stage impeller and a second-stage impeller which are arranged at intervals, the compressor further comprises a supporting sleeve, the supporting sleeve is located between the first-stage impeller and the second-stage impeller, and the axial sealing platform structure is matched with the end face of the second-stage impeller.
The application also provides an air conditioning unit, which comprises a compressor, wherein the compressor is the compressor.
In the above embodiment, in addition to the radial sealing hole structure for sealing the gap between the sealing element body and the motor shaft, the axial sealing platform structure is further adopted to be matched with the end face of the impeller, so as to seal the gap between the sealing element body and the end face of the impeller. Therefore, the radial and axial double sealing can be realized, the problem of large leakage amount when the radial sealing is adopted independently is solved, the problem that the impeller energy efficiency cannot be further improved due to the large leakage amount is avoided, and the operation energy efficiency of the compressor can be improved to a greater extent. Meanwhile, the problems of oil leakage, insufficient cooling and the like caused by large leakage of a shafting can be avoided, and the running reliability of the compressor is greatly improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. In the drawings:
FIG. 1 is a schematic cross-sectional view of a prior art centrifugal compressor;
fig. 2 is a schematic cross-sectional structure view of an embodiment of a compressor according to the present invention;
fig. 3 is a partially enlarged structural view of the compressor of fig. 2.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the following embodiments and accompanying drawings. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention.
In view of above-mentioned radial seal's bearing seal structural style not enough, the utility model provides a sealing member with radial axial double seal, the structure of this sealing member has solved the defect that lets out the unable further reduction of leakage quantity when adopting radial seal alone, can further improve centrifugal compressor's reliability, can be with the further improvement of impeller efficiency again to make centrifugal compressor's performance also obtain promoting, thereby improve the reliability and the performance of centrifugal unit operation.
Specifically, as shown in fig. 2, the sealing member includes a sealing member body 10, a radial sealing hole structure 11 is formed on the sealing member body 10 for being engaged with the motor shaft 30, and the radial sealing hole structure 11 is used for sealing a gap between the sealing member body 10 and the motor shaft 30. Besides, the seal body 10 is further formed with an axial seal land structure 12 for fitting with the end face of the impeller 40, and the axial seal land structure 12 is used for sealing a gap between the seal body 10 and the end face of the impeller 40.
Use the technical scheme of the utility model, except adopting radial seal pore structure 11 to seal the gap between sealing member body 10 and the motor shaft 30, still adopt axial seal platform structure 12 and impeller 40's terminal surface to cooperate to realize the sealed in clearance between the terminal surface to sealing member body 10 and impeller 40. Therefore, the radial and axial double sealing can be realized, the problem of large leakage amount when the radial sealing is adopted independently is solved, the problem that the energy efficiency of the impeller 40 cannot be further improved due to large leakage amount is avoided, and the operation energy efficiency of the compressor can be improved to a greater extent. Meanwhile, the problems of oil leakage, insufficient cooling and the like caused by large leakage of a shafting can be avoided, and the running reliability of the compressor is greatly improved.
As an alternative embodiment, as shown in fig. 3, the axial sealing table structure 12 is formed with a first sealing groove 121 in the form of a first comb tooth that is engaged with the end surface of the impeller 40. More preferably, the first seal groove 121 is in the form of a labyrinth seal. Optionally, in the technical solution of this embodiment, a second seal groove 111 in the form of a second comb tooth is formed on the radial seal hole structure 11. More preferably, the second seal groove 111 is in the form of a labyrinth seal. The labyrinth seal structures are arranged on the axial sealing platform structure 12 and the radial sealing hole structure 11, so that the sealing performance can be further improved, the reliability of the compressor is further improved, the efficiency of the impeller 40 can be further improved, and the performance of the compressor is further improved.
As an alternative embodiment, as shown in fig. 3, in the solution of the present embodiment, the axial sealing land structure 12 is a bevel structure, and the structure is set according to the end surface shape of the impeller 40 of the present embodiment. As another alternative embodiment, the axial sealing land structure 12 is a vertical face structure. As another alternative embodiment, the axial sealing platform structure 12 may also be an irregular arc surface, and it should be noted that, the axial sealing platform structure 12 mainly determines which type of axial comb tooth sealing type is used according to the structure of the axial end surface of the movable element to be sealed, and of course, the more complicated the axial surface, the more complicated the processing of the comb tooth sealing is, the more difficult it is to implement.
The utility model also provides a compressor, this compressor include foretell sealing member, adopt the compressor of above-mentioned sealing member. The operation energy efficiency of the compressor can be improved to a greater extent, and the performance of the whole air conditioning unit is improved to a great extent.
As shown in fig. 2, in the solution of the present embodiment, the compressor includes a compressor base 20, a motor shaft 30 and an impeller 40. The motor shaft 30 is rotatably installed in the compressor base 20, the impeller 40 is installed on the motor shaft 30, and the sealing member is sleeved on the motor shaft 30 through the radial sealing hole structure 11 and matched with the end face of the impeller 40 through the axial sealing platform structure 12. When in use, the radial sealing hole structure 11 seals a gap between the sealing element body 10 and the motor shaft 30, and the axial sealing platform structure 12 is matched with the end face of the impeller 40 to seal a gap between the sealing element body 10 and the end face of the impeller 40. Therefore, the radial and axial double sealing can be realized, the problem of large leakage amount when the radial sealing is adopted independently is solved, the problem that the energy efficiency of the impeller 40 cannot be further improved due to large leakage amount is avoided, and the operation energy efficiency of the compressor can be improved to a greater extent.
Optionally, in the technical solution of this embodiment, the impeller 40 includes a first-stage impeller 41 and a second-stage impeller 42 that are arranged at an interval, the compressor further includes a support sleeve 50, the support sleeve 50 is located between the first-stage impeller 41 and the second-stage impeller 42, and the axial sealing platform structure 12 is matched with an end face of the second-stage impeller 42. As other alternative embodiments, more stages of impellers may be designed according to actual working requirements, and only the axial sealing platform structure 12 needs to be matched with and sealed with the final stage of impeller.
It should be noted that the technical solution of the present invention is particularly suitable for sealing of a centrifugal compressor. Use the utility model discloses a afterwards, the sealed more reliable that becomes of each region on the centrifugal compressor shafting, the leakage quantity between each region also can be controlled at very little within range, thereby make lubricating oil and refrigerant among the centrifugal compressor can both seal the furthest's in effectual region performance, guarantee the reliability of centrifugal compressor operation, also make still less that impeller 40 department gaseous state refrigerant reveals, impeller 40 does work efficiency and improves greatly, guarantee that centrifugal compressor operation is under fine efficiency state, guarantee that centrifugal unit is reliable and efficient operation.
By adopting the technical scheme, the centrifugal compressor mainly has the following application states:
the working state I is as follows: when the centrifugal compressor bearing and the motor are both cooled by liquid refrigerant, the pneumatic working area on the left side of the sealing element is separated from the cooling area on the right side of the sealing element. At the left side, the first-stage impeller 41 and the second-stage impeller 42 of the centrifugal compressor rotate at high speed to compress gaseous refrigerants in the centrifugal compressor, and the middle of the two impellers is positioned through the supporting sleeve 50; the right motor shaft 30 and its bearings are cooled by liquid coolant. The radial sealing hole structure 11 is mainly used for preventing the liquid refrigerant on the right side from leaking to cause the cooling effect to be reduced, the inclined axial sealing platform structure 12 on the upper portion of the sealing element is mainly used for preventing the gaseous refrigerant on the position of the secondary impeller 42 from leaking too much to cause the energy efficiency to be lower, and the sealing element is fixed on the compressor base 20. Therefore, the centrifugal compressor sealing structure with radial and axial double sealing can enable the compressor to have high reliability and good performance.
And a second working state: when the centrifugal compressor bearing is cooled by lubricating oil and the motor is cooled by liquid refrigerant, the pneumatic working area on the left side of the sealing element is separated from the oil lubrication and refrigerant cooling area on the right side of the sealing element, and similarly, the bearing oil lubrication in the right side area and the motor liquid refrigerant lubricating liquid need to be separated through the shaft seal. At the left side, the first-stage impeller 41 and the second-stage impeller 42 of the centrifugal compressor rotate at high speed to compress gaseous refrigerants in the centrifugal compressor, and the middle of the two impellers is positioned through the supporting sleeve 50; the right motor shaft 30 and the bearings on the shaft are cooled by liquid refrigerant and lubricating oil, respectively. The radial sealing hole structure 11 is mainly used for preventing the cooling effect from being reduced due to the leakage of lubricating oil or liquid refrigerant on the right side, the inclined axial sealing platform structure 12 on the upper portion of the sealing element is mainly used for preventing the energy efficiency from being low due to the excessive leakage of gaseous refrigerant on the secondary impeller 42, and the sealing element is fixed on the compressor base 20. Therefore, the centrifugal compressor sealing structure with radial and axial double sealing can enable the compressor to have high reliability and good performance.
The utility model also provides an air conditioning unit, this air conditioning unit include foretell compressor. The air conditioning unit adopting the compressor can improve the operation energy efficiency of the compressor to a greater extent, so that the performance of the whole air conditioning unit is improved to a great extent.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, and it will be apparent to those skilled in the art that various modifications and variations can be made in the embodiments of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The sealing element comprises a sealing element body (10), wherein a radial sealing hole structure (11) matched with a motor shaft (30) is formed in the sealing element body (10), the radial sealing hole structure (11) is used for sealing a gap between the sealing element body (10) and the motor shaft (30), and the sealing element is characterized in that an axial sealing platform structure (12) matched with the end face of an impeller (40) is further formed in the sealing element body (10), and the axial sealing platform structure (12) is used for sealing the gap between the sealing element body (10) and the end face of the impeller (40).
2. A seal according to claim 1, characterized in that the axial sealing land structure (12) is formed with a first sealing groove (121) in the form of a first comb tooth cooperating with an end face of the impeller (40).
3. The seal according to claim 2, characterized in that the first sealing groove (121) is in the form of a labyrinth seal.
4. Seal according to claim 1, characterized in that the radial seal bore structure (11) is formed with a second seal groove (111) in the form of a second comb tooth.
5. Seal according to claim 4, characterized in that said second sealing groove (111) is in the form of a labyrinth seal.
6. A seal according to claim 1, wherein the axial sealing land structure (12) is a ramp structure or a vertical surface structure.
7. A compressor comprising a seal, characterized in that the seal is a compressor according to any one of claims 1 to 6.
8. The compressor of claim 7, comprising:
a compressor base (20);
a motor shaft (30) rotatably mounted within the compressor base (20);
an impeller (40) mounted on the motor shaft (30);
the sealing element is sleeved on the motor shaft (30) through a radial sealing hole structure (11) and matched with the end face of the impeller (40) through an axial sealing platform structure (12).
9. The compressor of claim 8, wherein the impeller (40) includes a primary impeller (41) and a secondary impeller (42) spaced apart from each other, the compressor further including a support sleeve (50), the support sleeve (50) being located between the primary impeller (41) and the secondary impeller (42), the axial seal land structure (12) being engaged with an end surface of the secondary impeller (42).
10. Air conditioning assembly comprising a compressor, characterized in that it is a compressor according to any one of claims 7 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922285971.6U CN211623805U (en) | 2019-12-18 | 2019-12-18 | Sealing member, compressor and air conditioning unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922285971.6U CN211623805U (en) | 2019-12-18 | 2019-12-18 | Sealing member, compressor and air conditioning unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211623805U true CN211623805U (en) | 2020-10-02 |
Family
ID=72630233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922285971.6U Active CN211623805U (en) | 2019-12-18 | 2019-12-18 | Sealing member, compressor and air conditioning unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211623805U (en) |
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2019
- 2019-12-18 CN CN201922285971.6U patent/CN211623805U/en active Active
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