CN215673598U - Air compressor machine and go out two oil blanket seal structure of axle head thereof - Google Patents
Air compressor machine and go out two oil blanket seal structure of axle head thereof Download PDFInfo
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- CN215673598U CN215673598U CN202121540686.5U CN202121540686U CN215673598U CN 215673598 U CN215673598 U CN 215673598U CN 202121540686 U CN202121540686 U CN 202121540686U CN 215673598 U CN215673598 U CN 215673598U
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Abstract
The utility model relates to a shaft sealing structure of an air compressor, in particular to a double-oil-seal sealing structure of the air compressor and an outlet shaft end of the air compressor, which comprises a rotating shaft, a shaft seat, an oil seal shaft sleeve, a first oil seal, a second oil seal and an oil seal seat, wherein the rotating shaft is connected with the shaft seat through a shaft; the rotating shaft is rotatably arranged on the shaft seat, an oil seal seat is fixedly arranged on the outer side of the shaft seat, and the output end of the rotating shaft penetrates through the shaft seat and the oil seal seat to extend outwards; the output end of the rotating shaft is coated with an oil seal shaft sleeve, and a first oil seal and a second oil seal are coated on the oil seal shaft sleeve from inside to outside; the first oil seal and the second oil seal are arranged in the oil seal seat; an annular first cavity is formed among the oil seal shaft sleeve, the first oil seal, the second oil seal and the oil seal seat; a second cavity is formed between the inner side of the oil seal seat and the shaft seat, an oil inlet hole is formed in the inner side of the oil seal seat, and the oil inlet hole is communicated with the first cavity and the second cavity; the bottom of first cavity is provided with the oil outlet. This patent effectively reduces the pressure of being used in the oil blanket, prolongs the life of oil blanket.
Description
Technical Field
The utility model relates to a shaft sealing structure of an air compressor, in particular to an air compressor and a double-oil-seal sealing structure of an outlet shaft end of the air compressor.
Background
At present, due to market and energy environmental protection requirements, the requirements on the quality of an air compressor and the environmental protection performance of equipment use are higher and higher, and machines with low service life and low use environmental protection performance can only be eliminated. The sealing between the main machine and the motor of the existing oil injection screw air compressor is mainly sealed by an oil seal, but the phenomenon of oil leakage caused by failure of the oil seal easily occurs in a simple oil seal sealing mode, and the leaked oil directly enters the motor to influence the normal work of the motor and cause the motor fault. In addition, because the screw rotor of the main machine continuously rotates to generate friction heat and the heat transfer generated in the compression process, the temperature of the oil seal position continuously rises, the service life and the sealing effect of the oil seal are influenced, and in the second-stage oil seal of the two-stage compression screw structure, when the oil seal normally works, the oil seal has continuous acting pressure on the lip, the friction resistance is larger, and the phenomenon that the oil seal fails and leaks oil is easier to occur.
An existing sealing structure, for example, a chinese utility model patent (publication No. CN208364787U, published as 20190111) discloses a shaft sealing structure of a screw compressor, which includes a rotation shaft, an oil seal shaft sleeve covering the rotation shaft, a main oil seal and an auxiliary oil seal covering the rotation shaft, and an oil seal seat covering the main oil seal and the auxiliary oil seal, wherein a static seal is formed between the oil seal shaft sleeve and the rotation shaft, the oil seal seat sleeve is arranged on the outer surface of the oil seal shaft sleeve, the main oil seal, the auxiliary oil seal and the oil seal seat form a static seal, a cavity is formed between the main oil seal seat and the oil seal shaft sleeve, the oil seal seat is provided with a hole channel connecting the outside and a through hole connecting the inside, and the hole channel of the oil seal seat is communicated with the cavity via the through hole of the oil seal seat. The utility model has the advantages of simple structure, strong adaptability, low cost and convenient installation. Under severe environment conditions or during the compression of toxic media, the structure can realize effective sealing, and once leakage occurs, the leakage substances can be recovered and treated, so that the environment friendliness is greatly improved.
However, in the above structure, the inner side of the main oil seal is continuously pressed when the compressor is operated, which results in oil leakage due to oil seal failure.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems, the utility model aims to provide an air compressor and a double-oil-seal sealing structure of an outlet shaft end of the air compressor.
For the purpose of the utility model, the following technical scheme is adopted for implementation:
a double oil seal sealing structure of an outlet shaft end of an air compressor comprises a rotating shaft, a shaft seat, an oil seal shaft sleeve, a first oil seal, a second oil seal and an oil seal seat; the rotating shaft is rotatably arranged on the shaft seat, an oil seal seat is fixedly arranged on the outer side of the shaft seat, and the output end of the rotating shaft penetrates through the shaft seat and the oil seal seat to extend outwards; the output end of the rotating shaft is coated with an oil seal shaft sleeve, and a first oil seal and a second oil seal are coated on the oil seal shaft sleeve from inside to outside; the first oil seal and the second oil seal are arranged in the oil seal seat; an annular first cavity is formed among the oil seal shaft sleeve, the first oil seal, the second oil seal and the oil seal seat; a second cavity is formed between the inner side of the oil seal seat and the shaft seat, an oil inlet hole is formed in the inner side of the oil seal seat, and the oil inlet hole is communicated with the first cavity and the second cavity; the bottom of the first cavity is provided with an oil outlet, and the oil outlet is used for leading the oil-gas mixture back to the low-pressure end of the air suction port of the air compressor.
Preferably, the rotating shaft is rotatably disposed on the shaft seat through a bearing.
Preferably, the bearing and the oil seal shaft sleeve are separated by a spacer.
Preferably, the oil inlet end of the oil inlet hole is 8mm in diameter, and the oil outlet end of the oil inlet hole is 1.5mm in diameter.
Preferably, the oil outlet hole has a diameter of 6 mm.
Preferably, a first positioning hole for positioning the first oil seal and a second positioning hole for positioning the second oil seal are arranged on the inner side of the oil seal seat, and the first positioning hole and the second positioning hole are separated by the accommodating hole.
Preferably, an inner hole is formed along the axial inner side of the first positioning hole, and the inner hole is communicated with the second cavity.
Preferably, an outer hole is arranged along the outer side of the second positioning hole in the axial direction, and a channel which extends downwards and is provided with an outlet at the lower part of the oil seal seat is arranged at the bottom of the outer hole; the passage is used for sucking the oil leaked from the second oil seal back into the air compressor head.
Preferably, a dustproof ring is arranged at the joint of the outer end of the oil seal seat and the rotating shaft.
The utility model provides an air compressor machine, this air compressor machine's play axle head seal structure adopts foretell two oil blanket seal structure of an air compressor machine play axle head.
In conclusion, the utility model has the advantages that: the oil-gas mixture body that the second cavity has continuation operating pressure acts on first oil blanket, and the oil-gas mixture body in the second cavity passes through the inlet port and gets into first cavity, reaches the effect that steps down, and the shape of inlet port plays the effect of damming. Simultaneously, get into the oil-gas mixture body in the first cavity, provide lubricated and the compressed oil of cooling for the second oil blanket, guaranteed the operational reliability of second oil blanket, increase of service life. The outlet end of the channel is provided with an oil leakage prevention and return device, so that leaked oil can be sucked back into the machine head after the second oil seal is lost, and the leaked oil does not flow outside to influence the quality of a machine.
Drawings
Fig. 1 is a sectional view of a sealing structure of an outlet end of an air compressor.
Detailed Description
The utility model provides an air compressor machine, this air compressor machine's play axle head seal structure adopts following two oil blanket seal structure of an air compressor machine play axle head.
As shown in figure 1, the double-oil seal sealing structure of the outlet shaft end of the air compressor comprises a rotating shaft 1, a shaft seat 2, an oil seal shaft sleeve 3, a first oil seal 4, a second oil seal 5 and an oil seal seat 6. The rotating shaft 1 is rotatably arranged on the shaft seat 2 through a bearing 11. The outer side of the shaft seat 2 is fixedly provided with an oil seal seat 6, the output end of the rotating shaft 1 penetrates through the shaft seat 2 and the oil seal seat 6 to extend outwards, and a dust ring 9 is arranged at the joint of the outer end of the oil seal seat 6 and the rotating shaft 1. The output end of the rotating shaft 1 is coated with an oil seal shaft sleeve 3, and the bearing 11 and the oil seal shaft sleeve 3 are separated by a spacer 12. The oil seal shaft sleeve 3 is coated with a first oil seal 4 and a second oil seal 5 from inside to outside. The first oil seal 4 and the second oil seal 5 are disposed in the oil seal holder 6. An annular first cavity 7 is formed among the oil seal shaft sleeve 3, the first oil seal 4, the second oil seal 5 and the oil seal seat 6. A second cavity 8 is formed between the inner side of the oil seal seat 6 and the shaft seat 2, an oil inlet 61 is formed in the inner side of the oil seal seat 6, and the oil inlet 61 is communicated with the first cavity 7 and the second cavity 8. The diameter of the oil inlet end of the oil inlet hole 61 is 8mm, the diameter of the oil outlet end is 1.5mm, and the effect of flow interception is achieved. The bottom of the first cavity 7 is provided with an oil outlet 62, and the oil outlet 62 is used for leading the oil-gas mixture back to the low-pressure end of the air suction port of the air compressor. The oil outlet hole 62 has a diameter of 6 mm.
A first positioning hole for positioning the first oil seal 4 and a second positioning hole for positioning the second oil seal 5 are formed in the inner side of the oil seal seat 6, and the first positioning hole and the second positioning hole are separated through an accommodating hole 63. An inner hole 64 is formed along the axial inner side of the first positioning hole, and the inner hole 64 is communicated with the second cavity 8. An outer hole 65 is arranged along the axial outer side of the second positioning hole, and a channel 66 which extends downwards and has an outlet positioned at the lower part of the oil seal seat 6 is arranged at the bottom of the outer hole 65. The passage 66 is used to suck back oil leaking from the second oil seal 5 into the air compressor head.
When the machine is in operation, the second cavity 8 has the oil-gas mixture of continuation operating pressure to act on first oil blanket 4, and the oil-gas mixture in the second cavity 8 passes through inlet port 61 and gets into first cavity 7 in, reaches the effect of step-down, and the shape of inlet port 61 plays the effect of damming. Simultaneously, get into the oil-gas mixture body in the first cavity 7, provide the compressed oil of lubrication and cooling for second oil blanket 5, guaranteed the operational reliability of second oil blanket 5, increase of service life. An oil leakage prevention device is arranged at the outlet end of the channel 66, so that leaked oil can be sucked back into the machine head after the second oil seal 5 is worn, and the leaked oil cannot flow outside to influence the quality of the machine.
The structure is suitable for shaft sealing of a two-stage compression second-stage machine head, and because the second stage has continuous working pressure in the working process relative to the first stage, the service life of an oil seal is easily reduced, the pressure acting on the oil seal can be effectively reduced through the structure, the service life of the oil seal is prolonged, and the reliability of machine operation is ensured.
Claims (10)
1. A double oil seal sealing structure of an outlet shaft end of an air compressor comprises a rotating shaft (1), a shaft seat (2), an oil seal shaft sleeve (3), a first oil seal (4), a second oil seal (5) and an oil seal seat (6); the oil seal device is characterized in that the rotating shaft (1) is rotatably arranged on the shaft seat (2), the outer side of the shaft seat (2) is fixedly provided with an oil seal seat (6), and the output end of the rotating shaft (1) penetrates through the shaft seat (2) and the oil seal seat (6) to extend outwards; an oil seal shaft sleeve (3) is coated and arranged at the output end of the rotating shaft (1), and a first oil seal (4) and a second oil seal (5) are coated and arranged on the oil seal shaft sleeve (3) from inside to outside; the first oil seal (4) and the second oil seal (5) are arranged in the oil seal seat (6); an annular first cavity (7) is formed among the oil seal shaft sleeve (3), the first oil seal (4), the second oil seal (5) and the oil seal seat (6); a second cavity (8) is formed between the inner side of the oil seal seat (6) and the shaft seat (2), an oil inlet hole (61) is formed in the inner side of the oil seal seat (6), and the oil inlet hole (61) is communicated with the first cavity (7) and the second cavity (8); the bottom of the first cavity (7) is provided with an oil outlet (62), and the oil outlet (62) is used for leading the oil-gas mixture back to the low-pressure end of the air suction port of the air compressor.
2. The double oil seal structure of the outlet end of the air compressor according to claim 1, wherein the rotary shaft (1) is rotatably disposed on the shaft seat (2) through a bearing (11).
3. The double oil seal structure of the air compressor output shaft end of claim 2, characterized in that the bearing (11) is separated from the oil seal shaft sleeve (3) by a spacer (12).
4. The double oil seal structure at the outlet end of the air compressor as claimed in claim 1, wherein the oil inlet hole (61) has an oil inlet end diameter of 8mm and an oil outlet end diameter of 1.5 mm.
5. The double oil seal structure of the air compressor outlet end according to claim 1, wherein the oil outlet hole (62) has a diameter of 6 mm.
6. The double-oil-seal sealing structure of the outlet end of the air compressor as claimed in claim 1, wherein a first positioning hole for positioning the first oil seal (4) and a second positioning hole for positioning the second oil seal (5) are formed in the inner side of the oil seal seat (6), and the first positioning hole and the second positioning hole are separated by an accommodating hole (63).
7. The double oil-sealed sealing structure of the outlet end of the air compressor as claimed in claim 6, wherein an inner hole (64) is provided along the inner side of the first positioning hole in the axial direction, and the inner hole (64) is communicated with the second cavity (8).
8. The double oil seal sealing structure of the outlet end of the air compressor as claimed in claim 6, wherein an outer hole (65) is provided along the outer side of the second positioning hole in the axial direction, the bottom of the outer hole (65) is provided with a channel (66) extending downwards and having an outlet located at the lower part of the oil seal seat (6); the passage (66) is used for sucking the oil leaked from the second oil seal (5) back into the air compressor head.
9. The double oil seal sealing structure of the outlet end of the air compressor according to claim 1, wherein a dust ring (9) is disposed at a joint of the outer end of the oil seal seat (6) and the rotating shaft (1).
10. An air compressor is characterized in that the sealing structure of the output shaft end of the air compressor adopts the double-oil-seal sealing structure of the output shaft end of the air compressor as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121540686.5U CN215673598U (en) | 2021-07-07 | 2021-07-07 | Air compressor machine and go out two oil blanket seal structure of axle head thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121540686.5U CN215673598U (en) | 2021-07-07 | 2021-07-07 | Air compressor machine and go out two oil blanket seal structure of axle head thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215673598U true CN215673598U (en) | 2022-01-28 |
Family
ID=79978979
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121540686.5U Active CN215673598U (en) | 2021-07-07 | 2021-07-07 | Air compressor machine and go out two oil blanket seal structure of axle head thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215673598U (en) |
-
2021
- 2021-07-07 CN CN202121540686.5U patent/CN215673598U/en active Active
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