CN209990639U - Sealing assembly of air compressor rotor and sealing structure using same - Google Patents
Sealing assembly of air compressor rotor and sealing structure using same Download PDFInfo
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- CN209990639U CN209990639U CN201920465352.2U CN201920465352U CN209990639U CN 209990639 U CN209990639 U CN 209990639U CN 201920465352 U CN201920465352 U CN 201920465352U CN 209990639 U CN209990639 U CN 209990639U
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Abstract
The utility model belongs to the technical field of air compressor and specifically relates to a seal assembly of air compressor rotor links to each other with the axle head of air compressor rotor, and the axle head of rotor links to each other with the gear in the oil pocket, and the rotor is arranged in the air chamber among the air compressor, and the air chamber includes air inlet and gas outlet, including first sealing member and second sealing member, the second sealing member sets up between gear bearing and air chamber, makes the oil pocket form sealedly, and first sealing member sets up between second sealing member and air chamber, forms the oil seepage groove between first sealing member and the second sealing member, and the oil seepage groove position is equipped with the draining hole. The utility model has the advantages of reasonable design, make the improvement to current oil pocket structure, design out oil seepage groove between air chamber and oil pocket, utilize the air that gets into in the oil pocket from the air chamber to leak into oil seepage groove's a small amount of lubricating oil and discharge with the oil pocket, avoid lubricating oil to get into the air chamber, guarantee the oil-free state of air compressor air chamber.
Description
Technical Field
The utility model belongs to the technical field of air compressor and specifically relates to sealing assembly of air compressor rotor and use this sealing assembly's seal structure.
Background
An air compressor is a device for compressing gas, and is similar to a water pump in structure, and most of the existing air compressors are reciprocating pistons, rotating blades or rotating screws. The unique double-rotor structure of the air compressor does not allow lubricating oil in the oil cavity to leak into the air chamber, because the lubricating oil can poison the electric pile of the fuel cell, air discharged by the air compressor for the fuel cell air supply system is not allowed to contain oil, namely the lubricating oil is prevented from entering the air chamber, the gap change problem can occur after the existing oil seal structure is used for a long time, particularly the compressed air in the air chamber can slowly enter the oil cavity along the connecting gap of the oil seal structure in the working process of the air compressor, and then the clearance that leads to oil blanket structure increases, and when the air compressor switches over to low rotational speed state or the in-process that stops from high rotational speed state, air chamber and oil pocket because of the change of pressure differential, lubricating oil in the oil pocket gets into the air chamber very easily, causes the lubricating oil leakage problem.
SUMMERY OF THE UTILITY MODEL
The utility model provides a seal assembly of air compressor rotor, its structural design is reasonable, makes the improvement to current oil pocket structure, designs out the oil seepage groove between air chamber and oil pocket, utilizes to leak into a small amount of lubricating oil of oil seepage groove with the oil pocket from the air that the air chamber got into in the oil pocket and discharges, avoids lubricating oil to get into the air chamber, guarantees the oil-free state of air compressor air chamber, has solved the problem that exists among the prior art.
The utility model discloses a solve the technical scheme that above-mentioned technical problem adopted and be: the sealing assembly of the air compressor rotor is connected with the shaft end of the air compressor rotor, the shaft end of the rotor is connected with a gear in an oil cavity, the rotor is located in the air chamber in the air compressor, the air chamber comprises an air inlet and an air outlet and comprises a first sealing element and a second sealing element, the second sealing element is arranged between a gear bearing and the air chamber, the oil cavity is sealed, the first sealing element is arranged between the second sealing element and the air chamber, an oil seepage groove is formed between the first sealing element and the second sealing element, and an oil drainage hole is formed in the oil seepage groove.
Preferably, the axial surface of the first sealing element is provided with an oil return structure, and when the rotor rotates, the oil return structure of the first sealing element forms an action of conveying lubricating oil to the inside of the oil-permeable groove so as to limit the lubricating oil in the oil-permeable groove from entering the air chamber.
Preferably, the oil return structure comprises a reverse spiral line, and the reverse spiral line forms a reverse pushing action in the rotating process of the first sealing element, so that the lubricating oil is in the oil leakage groove.
Preferably, a connector is arranged at the liquid outlet of the oil drainage hole, and the connector can be connected with an external pipeline.
Preferably, the first sealing element is a mechanical seal.
Preferably, the second sealing element is a first rotary oil seal.
A sealing structure using the sealing assembly, provided at both ends of a rotor of an air compressor, comprising:
a proximal gear end assembly comprising the first seal and the second seal;
a distal gear end assembly including a third seal.
Preferably, the first seal of the proximal gear end assembly faces the air outlet location of the housing, and compressed air flowing from the air inlet to the air outlet of the housing impinges on the first seal location, and compressed air enters the oil-permeable groove along the first seal location.
Preferably, the distal gear end of the rotor is arranged close to an air inlet of the housing, external air enters the air chamber from the air inlet and is rapidly discharged from the air outlet after being compressed, and air at the position of the air inlet does not have the pressure condition of entering the bearing seat from the third sealing element.
Preferably, the casing comprises a driving rotor and a driven rotor, and the reverse spiral directions of the first sealing elements connected with the driving rotor and the driven rotor are opposite.
The utility model adopts the above structure beneficial effect be, its structural design is reasonable, makes the improvement to current oil pocket structure, designs out the oil seepage groove between air chamber and oil pocket, utilizes to leak into a small amount of lubricating oil of oil seepage groove from the air chamber air that gets into in the oil pocket with the oil pocket and discharges, avoids lubricating oil to get into the air chamber, guarantees the oil-free state of air compressor air chamber.
Drawings
FIG. 1 is a schematic side view of the cross-sectional structure of the present invention;
fig. 2 is a schematic top sectional view of the present invention;
in the figure, 1, an air compressor; 2. a rotor; 3. an oil chamber; 4. a gear; 5. an air chamber; 6. an air inlet; 7. an air outlet; 8. a second seal member; 9. a first seal member; 10. an oil seepage groove; 11. an oil drainage hole; 12. A reverse helix; 13. a connector; 14. a third seal member; 15. a housing; 16. a bearing seat; 17. a drive rotor; 18. a driven rotor; 19. a deep groove ball bearing; 20. a needle bearing.
Detailed Description
In order to clearly illustrate the technical features of the present invention, the present invention is explained in detail by the following embodiments in combination with the accompanying drawings.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, however, the present application may be practiced in other ways than those described herein, and therefore the scope of the present application is not limited by the specific embodiments disclosed below.
In addition, in the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships based on those shown in the drawings, are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
As shown in fig. 1-2, the sealing assembly of the air compressor rotor is connected with the shaft end of the rotor 2 of the air compressor 1, the shaft end of the rotor 2 is connected with the gear 4 in the oil chamber 3, the rotor 2 of the air compressor 1 is positioned in the air chamber 5, the air chamber 5 comprises an air inlet 6 and an air outlet 7, the sealing assembly comprises a second sealing member 8 and a first sealing member 9, the second sealing member 8 is arranged between the gear bearing and the air chamber 5 to seal the oil chamber 3, the first sealing member 9 is arranged between the second sealing member 8 and the air chamber 5, the first sealing member 9 and the second sealing member 8 form an oil-leaking groove 10, the oil-leaking groove 10 is provided with an oil-draining hole 11, the second sealing member 8 is designed to play a main sealing effect on the lubricating oil in the oil chamber 3, a small amount of the lubricating oil in the oil chamber 3 enters the oil-leaking groove 10 through the second sealing member 8 due to leakage problem, when the, the pressure of oil seepage groove 10 constantly risees, and the design of draining hole 11 can make the inside high-pressure gas of oil seepage groove 10 discharge, and gas can be in the same direction as the area along 11 discharge processes in the draining hole and discharge the lubricating oil oppression in the oil seepage groove 10.
In order to further ensure the sealing performance of the first sealing element 9 and prevent the lubricating oil in the oil-leakage groove 10 from entering the air chamber 5, the axial surface of the first sealing element 9 is provided with an oil return structure, and when the rotor 2 rotates, the oil return structure of the first sealing element 9 performs the action of conveying the lubricating oil to the inside of the oil-leakage groove 10 so as to limit the lubricating oil in the oil-leakage groove 10 from entering the air chamber 5.
The oil return structure comprises a reverse spiral line 12, the reverse spiral line 12 forms a reverse pushing action in the rotating process of the first sealing element 9, a small amount of lubricating oil leaking from the second sealing element 8 is prevented from entering the air chamber 5, the lubricating oil is enabled to be in the oil leakage groove 10, and meanwhile, the lubricating oil is prevented from entering the air chamber 5 by high-pressure air in the air chamber 5.
The liquid outlet of the oil drainage hole 11 is provided with a connector 13, and the connector 13 can be connected with an external pipeline. Specifically, an oil discharge pipeline connected with the connector 13 can be designed, so that lubricating oil discharged from the oil discharge hole 11 can be reasonably collected and utilized.
Specifically, the first sealing element 9 is a mechanical seal.
Specifically, the second sealing element 8 is a first rotary oil seal.
A seal structure using seal assemblies is arranged at two ends of a rotor of an air compressor and comprises a proximal gear assembly and a distal gear assembly, wherein the proximal gear assembly comprises a first seal 9 and a second seal 8; the distal gear end assembly includes a third seal 14. The far gear assemblies and the near gear assemblies at the two ends of the rotor 2 are matched to form complete sealing for lubricating oil, so that the lubricating oil is prevented from entering the air chamber 5.
Specifically, the third seal 14 may be a second rotary oil seal.
The mechanical seal of the proximal gear end assembly faces the air outlet 7 of the housing 15, and compressed air flowing from the air inlet 6 to the air outlet 7 of the housing 15 impinges on the first seal 9, and the compressed air enters the oil-permeable groove 10 along the first seal 9. In the working process of the air compressor 1, because the pressure of the air outlet 7 is large, a pressure difference is formed between two sides of the first sealing element 9, a small amount of compressed air can enter the oil seepage groove 10 through the first sealing element 9, and a small amount of leaked oil in the oil seepage groove 10 is blown out.
The far gear end of the rotor 2 is arranged close to the air inlet 6 of the casing 15, external air enters the air chamber 5 from the air inlet 6 and is rapidly discharged from the air outlet 7 after being compressed, and the air at the position of the air inlet 6 does not have the pressure condition of entering the bearing seat 16 from the third sealing element 14.
The casing 15 contains a driving rotor 17 and a driven rotor 18 of the air compressor, and because the driving rotor 17 and the driven rotor 18 rotate in opposite directions, the reverse spiral lines 12 of the first sealing element 9 connected with the driving rotor 17 and the driven rotor 18 are arranged in opposite directions.
The near gear end of the rotor 2 is connected with a deep groove ball bearing 19. The deep groove ball bearing is the most representative rolling bearing, compared with other types of bearings with the same size, the deep groove ball bearing is small in friction coefficient, high in limit rotating speed, simple in structure, low in manufacturing cost, high in precision, free of frequent maintenance, large in size range and multiple in form, mainly bears radial load from a rotor, can bear certain axial load, and is suitable for being installed at the end, close to a gear, of the rotor of an air compressor.
The distal gear end of the rotor 2 is connected to a needle bearing 20. The needle roller bearing is provided with a thin and long roller, so the radial structure is compact, the inner diameter size and the load capacity are the same as those of other types of bearings, the outer diameter is the smallest, the needle roller bearing is particularly suitable for a bearing structure with limited radial installation size, can bear a certain axial load while bearing a high radial load, and is suitable for being installed at the far gear end of an air compressor rotor.
The above-mentioned specific embodiments can not be regarded as the restriction to the scope of protection of the utility model, to technical personnel in this technical field, it is right the utility model discloses any replacement improvement or transform that embodiment made all fall within the scope of protection of the utility model.
The parts of the present invention not described in detail are the known techniques of those skilled in the art.
Claims (10)
1. The sealing assembly of the air compressor rotor is connected with the shaft end of the air compressor rotor, the shaft end of the rotor is connected with a gear in an oil cavity, the rotor is located in the air chamber in the air compressor, the air chamber comprises an air inlet and an air outlet, the sealing assembly is characterized by comprising a first sealing element and a second sealing element, the second sealing element is arranged between a gear bearing and the air chamber, the oil cavity is sealed, the first sealing element is arranged between the second sealing element and the air chamber, an oil seepage groove is formed between the first sealing element and the second sealing element, and an oil drainage hole is formed in the oil seepage groove.
2. The air compressor rotor seal assembly of claim 1, wherein the axial surface of the first seal member is provided with an oil return structure, the oil return structure of the first seal member providing a pumping action of the oil into the oil-permeable groove to restrict the oil in the oil-permeable groove from entering the air chamber when the rotor rotates.
3. The air compressor rotor seal assembly of claim 2, wherein the oil return structure includes a reverse helix that provides a reverse thrust action during rotation of the first seal to place the lubricant in the sump.
4. The sealing assembly of an air compressor rotor as claimed in claim 2 or 3, wherein a connector is arranged at the liquid outlet of the oil drain hole, and the connector can be connected with an external pipeline.
5. The air compressor rotor seal assembly of claim 4, wherein the first seal is a mechanical seal.
6. The air compressor rotor seal assembly of claim 5, wherein the second seal is a first rotary oil seal.
7. A sealing structure using the seal assembly as set forth in any one of claims 1 to 6, provided at both ends of a rotor of a roots type compressor, comprising:
a proximal gear end assembly comprising the first seal and the second seal;
a distal gear end assembly including a third seal.
8. The seal structure of claim 7, wherein the first seal of the proximal gear end assembly faces the air outlet location of the housing, and wherein compressed air flowing from the air inlet to the air outlet of the housing impinges on the first seal location, and wherein compressed air enters the oil-weep cavity along the first seal location.
9. The seal of claim 8, wherein the distal geared end of the rotor is disposed adjacent to an air inlet of the housing, external air entering the air chamber from the air inlet being compressed and then rapidly exiting the air outlet, the air at the air inlet being at a location that is free of pressure conditions for entering the housing from the third seal.
10. A sealing arrangement according to claim 8 or 9, wherein the housing includes a driving rotor and a driven rotor therein, the opposing helices of the first seal associated with the driving and driven rotors being oppositely disposed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920465352.2U CN209990639U (en) | 2019-04-04 | 2019-04-04 | Sealing assembly of air compressor rotor and sealing structure using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920465352.2U CN209990639U (en) | 2019-04-04 | 2019-04-04 | Sealing assembly of air compressor rotor and sealing structure using same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209990639U true CN209990639U (en) | 2020-01-24 |
Family
ID=69291129
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920465352.2U Active CN209990639U (en) | 2019-04-04 | 2019-04-04 | Sealing assembly of air compressor rotor and sealing structure using same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209990639U (en) |
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2019
- 2019-04-04 CN CN201920465352.2U patent/CN209990639U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: The sealing component of air compressor rotor and the sealing structure using the sealing component Effective date of registration: 20200928 Granted publication date: 20200124 Pledgee: Shandong Qixia Rural Commercial Bank Co.,Ltd. Pledgor: YANTAI DONGDE INDUSTRIAL Co.,Ltd. Registration number: Y2020980006551 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |