CN113685350B - A screw air compressor and its oil seal device - Google Patents
A screw air compressor and its oil seal device Download PDFInfo
- Publication number
- CN113685350B CN113685350B CN202110885267.3A CN202110885267A CN113685350B CN 113685350 B CN113685350 B CN 113685350B CN 202110885267 A CN202110885267 A CN 202110885267A CN 113685350 B CN113685350 B CN 113685350B
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- China
- Prior art keywords
- oil
- oil seal
- air compressor
- end cover
- oil passage
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C18/12—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
- F04C18/14—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
- F04C18/16—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C27/00—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/02—Lubrication; Lubricant separation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/20—Rotors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/30—Casings or housings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/50—Bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/50—Bearings
- F04C2240/56—Bearing bushings or details thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/80—Other components
- F04C2240/809—Lubricant sump
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
本发明涉及空压机领域，尤其是一种螺杆空压机及其油封装置，包括空压机壳体、阳转子、轴承、油封和油封端盖；阳转子的一端设置有轴突，轴突延伸到空压机壳体的外侧，轴突上包覆设置有油封，油封外侧设置有油封端盖，油封端盖的下部设置有第一油道，阳转子座和阴转子座之间设置有第二油道，第二进油口与第一出油口连通；第二油道的第二出油口位于阴转子座内；阴转子座的下部设置有第三油道，第三油道的第三进油口位于阴转子座内，第三油道的第三出油口位于空压机壳体的下部。本专利即使油封被磨损，润滑油可以通过第一油道、第二油道、第三油道和回油管最终回到空压机壳体的内部，防止发生漏油现象。
The present invention relates to the field of air compressors, in particular to a screw air compressor and its oil seal device, including an air compressor housing, a male rotor, a bearing, an oil seal and an oil seal end cover; an axle is provided at one end of the male rotor, the axle extends to the outside of the air compressor housing, an oil seal is provided on the axle, an oil seal end cover is provided on the outside of the oil seal, a first oil passage is provided at the lower part of the oil seal end cover, a second oil passage is provided between the male rotor seat and the female rotor seat, and the second oil inlet is connected to the first oil outlet; the second oil outlet of the second oil passage is located in the female rotor seat; a third oil passage is provided at the lower part of the female rotor seat, the third oil inlet of the third oil passage is located in the female rotor seat, and the third oil outlet of the third oil passage is located at the lower part of the air compressor housing. Even if the oil seal is worn out, the lubricating oil can finally return to the interior of the air compressor housing through the first oil passage, the second oil passage, the third oil passage and the oil return pipe to prevent oil leakage.
Description
Technical Field
The invention relates to the field of air compressors, in particular to a screw air compressor and an oil seal device thereof.
Background
A traditional air compressor is provided with an oil seal on a crankshaft, and a host and a motor are separated through the oil seal, so that lubricating oil is prevented from flowing out of the host. If the oil seal is damaged, the sealing failure can occur, and lubricating oil in the host machine flows out of the host machine, so that the air compressor is scrapped. Accordingly, the lubricating oil flowing to the outside of the oil seal needs to be treated accordingly.
Disclosure of Invention
In order to solve the above problems, an object of the present invention is to provide a screw air compressor and an oil sealing device thereof, in which an oil passage for collecting leaked lubricating oil is provided at an outer side of an oil seal, so as to prevent the leaked lubricating oil from flowing out of a main machine.
For the purpose of the invention, the following technical scheme is adopted for implementation:
an oil seal device of a screw compressor comprises an air compressor shell, a male rotor, a bearing, an oil seal and an oil seal end cover;
The air compressor shell is provided with a male rotor seat and a female rotor seat, and the male rotor seat is positioned above the female rotor seat; the male rotor is rotatably arranged on the male rotor seat through a bearing, one end of the male rotor is provided with an axon, the axon extends to the outer side of the air compressor shell, an oil seal is coated on the axon, the oil seal is positioned at the outer side of the bearing, an oil seal end cover is arranged at the outer side of the oil seal, and the oil seal end cover is fixedly arranged on the side surface of the air compressor shell;
the lower part of the oil seal end cover is provided with a first oil duct, a first oil inlet of the first oil duct is positioned on the upper end face of the limit flange, and a first oil outlet of the first oil duct is positioned on the side face of the oil seal end cover, which is connected with the air compressor shell;
A second oil duct is arranged between the male rotor seat and the female rotor seat, a second oil inlet of the second oil duct is positioned on the side surface of the air compressor shell and is communicated with the first oil outlet;
The female rotor seat is sealed through a female rotor end cover, a third oil duct is arranged at the lower part of the female rotor seat, a third oil inlet of the third oil duct is positioned in the female rotor seat, and a third oil outlet of the third oil duct is positioned at the lower part of the air compressor shell.
Preferably, the air compressor shell is further provided with an air inlet seat, and the third oil outlet is connected with an air inlet of the air inlet seat through an oil return pipe.
Preferably, a shaft sleeve is arranged between the oil seal and the shaft protrusion, the shaft sleeve is separated from the bearing by a spacer, and a dust-proof ring is arranged between the end part of the outer side of the oil seal end cover and the shaft protrusion.
Preferably, the inner side of the oil seal end cover is provided with a mounting part matched with the inner diameter of the male rotor seat.
Preferably, the first oil duct is further provided with a first opening, the first opening is located at the bottom of the oil seal end cover, and the first opening is provided with a first plug.
Preferably, the third oil duct is further provided with a second opening, the second opening is located on the side face of the air compressor shell, and the second opening is provided with a second plug.
Preferably, the lower part of the oil seal end cover is provided with a fourth oil duct, a fourth oil inlet of the fourth oil duct is positioned at the lower side of the inside of the oil seal end cover and at the inner side of the limit flange, a fourth oil outlet of the fourth oil duct is positioned on the end face of the inner side of the oil seal end cover, the air compressor shell is provided with a fifth oil duct, a fifth oil inlet of the fifth oil duct is communicated with the fourth oil outlet, and a fifth oil outlet of the fifth oil duct is communicated with a compression cavity in the air compressor shell.
Preferably, the male rotor seat is provided with a bearing seat, and a sixth oil duct communicated with the compression cavity inside the air compressor shell is arranged on the bearing seat.
Preferably, the upper side of the inside of the oil seal end cover is provided with a cutoff hole, the aperture of the outer side of the cutoff hole is smaller than that of the inner side of the cutoff hole, and the cutoff hole is positioned on the inner side of the oil seal.
The screw air compressor adopts the oil seal device.
In summary, the present invention has the advantages that even if the oil seal is worn, the lubricating oil can finally return to the inside of the air compressor housing through the first oil passage, the second oil passage, the third oil passage and the oil return pipe, so as to prevent oil leakage.
Drawings
Fig. 1 is a schematic structural view of a screw air compressor.
Fig. 2 is a sectional view of the screw air compressor with a motor portion removed.
Fig. 3 is a partial enlarged view of fig. 2.
Fig. 4 and 5 are schematic structural views of an oil seal end cap.
Fig. 6 and 7 are schematic structural views of the air compressor housing.
Detailed Description
As shown in fig. 1 to 7, an oil seal device of a screw compressor includes an air compressor housing 1, a male rotor 2, a bearing 3, an oil seal 4, and an oil seal end cap 5.
As shown in fig. 2, the air compressor housing 1 is provided with a male rotor seat 11 and a female rotor seat 12, and the male rotor seat 11 is located above the female rotor seat 12. The male rotor 2 and the female rotor are rotatably provided on the male rotor seat 11 and the female rotor seat 12, respectively, through the bearings 3, and the male rotor 2 and the female rotor are engaged with each other. The male rotor seat 11 is provided with a bearing seat 111, and a sixth oil duct 1111 communicated with the compression cavity inside the air compressor housing 1 is arranged on the bearing seat 111, and the sixth oil duct 1111 is used for leading lubricating oil inside the air compressor housing 1 to the bearing 3, and lubricating and cooling the bearing 3.
As shown in fig. 3, an end of the male rotor 2 is provided with an axial protrusion 21, the axial protrusion 21 extends to the outer side of the air compressor housing 1, an oil seal 4 is coated on the axial protrusion 21, and the oil seal 4 is located at the outer side of the bearing 3, preferably, a shaft sleeve 6 is arranged between the oil seal 4 and the axial protrusion 21, and the shaft sleeve 6 is separated from the bearing 3 by a spacer 7. The oil blanket 4 outside is provided with oil blanket end cover 5, and oil blanket end cover 5 is fixed to be set up in the side of air compressor machine casing 1. The oil seal end cover 5 is provided with a limit flange 50, the oil seal 4 is positioned on the inner side of the limit flange 50, and the oil seal 4 is limited through the limit flange 50. Preferably, the end part and the shaft projection 21 on the outer side of the oil seal end cover 5 are also provided with a dust-proof ring 8, so that dust is prevented from entering, and the service life of the oil seal 4 is prolonged. Preferably, the inner side of the oil seal end cover 5 is provided with a mounting part 52 matched with the inner diameter of the male rotor seat 11, so that the oil seal end cover 5 is convenient to mount. The oil seal end cap 5 seals the male rotor seat 11. The first cavity A is formed among the shaft protrusion 21, the right side of the bearing 3, the left side of the oil seal 4 and the oil seal end cover 5, and the second cavity B is formed among the right side of the oil seal 4, the oil seal end cover 5 and the shaft protrusion 21.
The lower part of the oil seal end cover 5 is provided with a first oil duct 51, and a first oil inlet 511 of the first oil duct 51 is positioned on the upper end face of the limit flange 50, namely, the first oil inlet 511 is positioned in the second cavity B. The first oil outlet 512 of the first oil passage 51 is located on the side of the oil seal end cap 5 to which the air compressor housing 1 is connected.
The female rotor seat 12 is sealed by a female rotor end cap 121. A second oil duct 13 is arranged between the male rotor seat 11 and the female rotor seat 12, a second oil inlet 131 of the second oil duct 13 is positioned on the side surface of the air compressor housing 1, and the second oil inlet 131 is communicated with the first oil outlet 512. The second oil outlet 132 of the second oil passage 13 is located at an upper portion of the female rotor seat 12.
The lower part of the female rotor seat 12 is provided with a third oil duct 14, a third oil inlet 141 of the third oil duct 14 is positioned in the female rotor seat 12, and a third oil outlet 142 of the third oil duct 14 is positioned at the lower part of the air compressor housing 1. An air inlet seat 15 is further arranged on the air compressor shell 1, and a third oil outlet 142 is connected with the air inlet seat 15 through an oil return pipe.
Preferably, the first oil duct 51 is further provided with a first opening 513, the first opening 513 is located at the bottom of the oil seal end cover 5, the first opening 513 is provided with a first plug 5131, and the first opening 513 is convenient for cleaning the first oil duct 51.
Preferably, the third oil duct 14 is further provided with a second opening 143, the second opening 143 is located on a side surface of the air compressor housing 1, a second plug 1431 is disposed on the second opening 143, and the second opening 143 is convenient for cleaning the third oil duct 14.
As shown in fig. 4 and 5, the lower portion of the oil seal end cap 5 is provided with a fourth oil passage 53, and a fourth oil inlet 531 of the fourth oil passage 53 is located at the inner lower side of the oil seal end cap 5 and at the inner side of the limit flange 50, i.e., in the first cavity a. A fourth oil outlet 532 of the fourth oil passage 53 is located on the end surface inside the oil seal end cap 5. As shown in fig. 6 and 7, the air compressor housing 1 is provided with a fifth oil passage 16, a fifth oil inlet 161 of the fifth oil passage 16 communicates with a fourth oil outlet 532, and a fifth oil outlet 162 of the fifth oil passage 16 communicates with a compression chamber inside the air compressor housing 1. The fourth oil passage 53 and the fifth oil passage 16 serve to return the lubricating oil in the first cavity a to the compression chamber.
As shown in fig. 3, the upper side of the inside of the oil seal end cover 5 is provided with a cutoff hole 54, the aperture of the outside of the cutoff hole 54 is smaller than that of the inside, the cutoff hole 54 is located on the inside of the oil seal 4, and the cutoff hole 54 is used for reducing the pressure of the oil-gas mixture on the inside of the air compressor housing 1 to the oil seal 4.
The screw air compressor adopts the oil seal device.
When the oil seal device works, the oil-gas mixture inside the air compressor housing 1 moves to the right side and enters the first cavity a, and the fourth oil passage 53 and the fifth oil passage 16 normally return the lubricating oil in the first cavity a to the compression chamber. However, because the oil seal 4 and the male rotor 2 are rotationally sealed, and the oil seal 4 is subjected to the pressure of the oil-gas mixture, after the machine operates for a period of time, the oil seal 4 is deformed, the inner diameter of the oil seal 4 is increased, so that a part of lubricating oil in the first cavity a flows into the second cavity B, then enters the first oil duct 51 through the first oil inlet 511, flows out of the first oil outlet 512, enters the second oil duct 13 through the second oil inlet 131, flows out of the second oil outlet 132, enters the female rotor seat 12, then flows downwards to the lower part of the female rotor seat 12, then enters the third oil duct 14 through the third oil inlet 141, flows out of the third oil outlet 142, flows into the air inlet seat 15 through the oil return pipe, and finally returns to the inside of the air compressor housing 1, thereby solving the oil leakage problem.
The oil seal device has the advantage that even if the oil seal 4 is worn, lubricating oil can finally return to the inside of the air compressor housing 1 through the first oil passage 51, the second oil passage 13, the third oil passage 14 and the oil return pipe, so that oil leakage is prevented.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110885267.3A CN113685350B (en) | 2021-08-03 | 2021-08-03 | A screw air compressor and its oil seal device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110885267.3A CN113685350B (en) | 2021-08-03 | 2021-08-03 | A screw air compressor and its oil seal device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113685350A CN113685350A (en) | 2021-11-23 |
| CN113685350B true CN113685350B (en) | 2025-05-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110885267.3A Active CN113685350B (en) | 2021-08-03 | 2021-08-03 | A screw air compressor and its oil seal device |
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| CN (1) | CN113685350B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN215805161U (en) * | 2021-08-03 | 2022-02-11 | 鑫磊压缩机股份有限公司 | A screw air compressor and its oil seal device |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2657654B1 (en) * | 1990-01-26 | 1993-05-14 | Dresser Produits Indls | SUPPORT BEARING FOR THE DRIVE SHAFT OF AN OIL LEAKAGE COMPRESSOR, AND COMPRESSOR EQUIPPED WITH THIS BEARING. |
| JP3937077B2 (en) * | 1996-10-23 | 2007-06-27 | 北越工業株式会社 | Lubrication structure of bearing chamber |
| JP4066038B2 (en) * | 2000-07-11 | 2008-03-26 | 株式会社日立産機システム | Oil-cooled screw compressor |
| JP5116703B2 (en) * | 2009-01-21 | 2013-01-09 | 株式会社日立産機システム | Screw compressor |
| KR101970668B1 (en) * | 2017-12-21 | 2019-04-19 | 재 영 이 | Sealing device of oil-injection Screw Compressor |
| CN211819903U (en) * | 2020-01-21 | 2020-10-30 | 天津商业大学 | Oil-free screw refrigerating compressor for injecting and isolating lubricating oil |
| CN212225987U (en) * | 2020-04-09 | 2020-12-25 | 上海汉钟精机股份有限公司 | Negative pressure shaft sealing device and air compressor comprising same |
| CN111720329A (en) * | 2020-05-26 | 2020-09-29 | 厦门东亚机械工业股份有限公司 | An oil seal insurance system and method |
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2021
- 2021-08-03 CN CN202110885267.3A patent/CN113685350B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN215805161U (en) * | 2021-08-03 | 2022-02-11 | 鑫磊压缩机股份有限公司 | A screw air compressor and its oil seal device |
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| CN113685350A (en) | 2021-11-23 |
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