CN104747723A - Efficient shaft sealing structure of screw compressor - Google Patents
Efficient shaft sealing structure of screw compressor Download PDFInfo
- Publication number
- CN104747723A CN104747723A CN201510096033.5A CN201510096033A CN104747723A CN 104747723 A CN104747723 A CN 104747723A CN 201510096033 A CN201510096033 A CN 201510096033A CN 104747723 A CN104747723 A CN 104747723A
- Authority
- CN
- China
- Prior art keywords
- shaft
- end cover
- bearing
- sleeve body
- lip seal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- F04C27/008—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids for other than working fluid, i.e. the sealing arrangements are not between working chambers of the machine
- F04C27/009—Shaft sealings specially adapted for pumps
-
- 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
- F04C2240/60—Shafts
- F04C2240/605—Shaft sleeves or details thereof
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
- Sealing With Elastic Sealing Lips (AREA)
Abstract
The invention relates to an efficient shaft sealing structure of a screw compressor, and belongs to the technical field of accessories of the screw compressor. The screw compressor comprises an extending-out shaft, a bearing and an end cover arranged at the end of a compressor shell; the extending-out shaft is installed on the bearing and extends out of the compressor shell through a center hole in the end cover, and the shaft sealing structure comprises a shaft sleeve and a lip seal. The efficient shaft sealing structure is characterized in that the shaft sleeve comprises a shaft sleeve body which is arranged on the extending-out shaft in a sleeving mode, the shaft sleeve body and the extending-out shaft form close fit, an oil slinger is arranged at the position, close to the end and close to one side of the bearing, of the shaft sleeve body in an expanding mode in the radial direction, and a tiny gap is kept between the outer wall of the oil slinger and the inner wall of the center hole; the lip seal is arranged on the shaft sleeve body in a sleeving mode and is embedded in a shaft sealing hole of a sealing end cover, and the sealing end cover is arranged at the end, far away from the bearing, of the shaft sleeve body in a sleeving mode and is fixedly connected with the end cover. The efficient shaft sealing structure is simple in structure, easy to assemble and disassemble, good in sealing performance and long in service life, the pretightening force between the lip seal and the shaft sleeve can be effectively reduced, and the abrasion speed of the lip seal is decreased.
Description
Technical field
The invention belongs to the attachment technique field of helical-lobe compressor, be specifically related to a kind of efficient shaft seal structure of helical-lobe compressor.
Background technique
In actual use, helical-lobe compressor, due to the reason such as vibration, friction of system, has oil leakage to be a ubiquitous phenomenon at live axle external part.What traditional helical-lobe compressor adopted axle sleeve and lip seal usually coordinates the sealing realized axle external part, and described axle sleeve is wrapped on the outer wall of axle external part, and this shaft seal structure ensures sealing effect mainly through the match grinding of lip seal and axle sleeve.But, there is following defect when practical application in this structure: described lip seal has self sealing action, rely on working pressure effect sealing lip, make sealing lip compress axle sleeve and obtain sealing effect to stop the leakage of lubricant oil, working pressure is mainly derived from the hydrodynamic pressure of pretightening force and working medium, once lip seal is mated unreasonable with the pretightening force of axle sleeve, will accelerate the wearing and tearing of sealing lip, cause shorten the working life of shaft seal, occur oil leakage phenomenon; In addition, the sealing force of lip seal provides primarily of sealing lip natural resiliency, and sealing lip directly contacts with medium fluid, will draw that sealing lip hardens, breaks, the problem such as aging when sealing material and medium fluid do not mate, thus cause sealing lip leakage of oil, good sealability cannot be ensured.
In view of above-mentioned prior art, be necessary to be improved the shaft seal structure of existing helical-lobe compressor.For this reason, the applicant has done useful design, and technological scheme described below produces under this background.
Summary of the invention
The object of the present invention is to provide a kind of efficient shaft seal structure of helical-lobe compressor, its structure is simple, be easy to mounting or dismounting, good seal performance, long service life, effectively can reduce the pretightening force of lip seal and axle sleeve, the rate of wear of lip seal of slowing down.
The object of the invention is to reach like this, a kind of efficient shaft seal structure of helical-lobe compressor, described helical-lobe compressor comprises projecting shaft, bearing and be located at the end cap of compression case end of body, described projecting shaft to be arranged on bearing and via end-cover axle to center hole lean out to compression case external, described shaft seal structure comprises axle sleeve and lip seal, it is characterized in that: described axle sleeve comprises sleeve body, described sleeve body is set on projecting shaft and both structures are drive fit, sleeve body is at the near-end head near bearing side and radially expand and establish and be configured with a disc, small gap is maintained between the outer wall of described disc and the inwall of described center hole, described lip seal to be set on described sleeve body and to be embedded in the shaft seal hole in the middle of an end cover, and sealing end cap is set in sleeve body away from one end of bearing and is connected and fixed with described end cap.
In a specific embodiment of the present invention, described end cover comprises end cover body, described end cover body towards the direction of disc narrow contract to extend have an oil collecting ring, described oil collecting ring offers oil trap on outer circle wall body.
In another specific embodiment of the present invention, described disc offers groove on the surface towards described oil collecting ring side, and the termination of described oil collecting ring probes into in described groove.
The present invention sets up disc on sleeve body, maintains small gap between the inwall of the outer wall of described disc and the center hole of described end cap, and the lubricant oil that major part flows out from bearing can be stoped not flow to lip seal; Described end cover offers oil trap on oil collecting ring, forming oil-collecting passage for collecting the lubricant oil revealed from small gap location, further increasing the isolating seal effect of lubricant oil and lip seal.Lip seal and lubricant oil are well isolated, and can reduce the pretightening force of itself and axle sleeve by this, slow down the rate of wear, extend machinery working life simultaneously, improve the functional reliability of helical-lobe compressor; And overall structure is simple, sealing is reliable, be easy to mounting or dismounting.
Accompanying drawing explanation
Fig. 1 is the structure diagram of helical-lobe compressor of the present invention.
Fig. 2 is the schematic diagram of shaft seal structure of the present invention.
In figure: 1. projecting shaft; 2. lip seal; 3. end cover, 31. shaft seal holes, 32. end cover bodies, 33. oil collecting rings, 331. oil traps; 4. axle sleeve, 41. sleeve body, 42. discs, 421. grooves; 5. bearing; 6. end cap, 61. center holes; 7. compressor housing; 8. screw; A. gap.
Embodiment
Claimant will describe in detail the specific embodiment of the present invention below by reference to the accompanying drawings; but claimant is not the restriction to technological scheme to the description of embodiment, any changing in the form rather than substance according to the present invention's design all should be considered as protection scope of the present invention.
Refer to Fig. 1 and composition graphs 2, the present invention relates to a kind of efficient shaft seal structure of helical-lobe compressor, described helical-lobe compressor comprises projecting shaft 1, bearing 5 and is located at the end cap 6 of compressor housing 7 end.Described projecting shaft 1 is arranged on bearing 5 and via the center hole 61 of end cap 6 axis and leans out to outside compressor housing 7.Described shaft seal structure comprises lip seal 2, end cover 3 and axle sleeve 4, described axle sleeve 4 comprises columnar sleeve body 41, described sleeve body 41 is set on projecting shaft 1 and both form drive fit, makes axle sleeve 4 can follow projecting shaft 1 synchronous axial system.Sleeve body 1 is at the near-end head near bearing 5 side and radially expand and establish and be configured with a disc 42, maintains small gap A between the outer wall of described disc 42 and the inwall of described center hole 61.Described lip seal 2 to be set on sleeve body 41 and to be embedded in the shaft seal hole 31 in the middle of described end cover 3, and described end cover 3 is set in sleeve body 41 away from one end of bearing 5 and is connected and fixed by screw 8 and end cap 6, easy accessibility.Described end cover 3 comprises end cover body 32, described end cover body 32 is at the narrow columned oil collecting ring 33 extending and have a hollow that contracts in direction towards disc 42, described oil collecting ring 33 offers oil trap 331 on the wall body of excircle, forms oil-collecting passage.Described disc 42 offers groove 421 on the surface towards described oil collecting ring 33 side, and the termination of described oil collecting ring 33 probes into in described groove 421.
Please continue to refer to Fig. 1 and Fig. 2, the gap A maintained between the outer wall of described disc 42 and the inwall of described center hole 61 is due to very small, therefore sealing configuration is formed, like this in the working procedure of helical-lobe compressor, the lubricant oil flowed out from bearing 5 is thrown away by disc 42, and wherein the lubricant oil of the overwhelming majority is intercepted by small gap A and do not flow to lip seal 2.Described end cover body 32 is at the narrow oil collecting ring 33 extended that contracts in direction towards disc 42, the oil trap 331 that the excircle wall body of described oil collecting ring 33 is offered, form oil-collecting passage, for collecting the lubricant oil revealed from described gap A, further increase the isolating seal effect of lubricant oil and lip seal 2.Described disc 42 offers groove 421 on the surface towards described oil collecting ring 33 side, and the termination of described oil collecting ring 33 probes into in described groove 421, thus can ensure that the lubricant oil collected by oil trap 331 does not flow to lip seal 2.Lip seal 2 and lubricant oil are well isolated, and can reduce the pretightening force of itself and axle sleeve 4 by this, slow down the rate of wear, increase the service life.
Claims (3)
1.
a kind of efficient shaft seal structure of helical-lobe compressor, described helical-lobe compressor comprises projecting shaft (1), bearing (5) and be located at the end cap (6) of compressor housing (7) end, described projecting shaft (1) be arranged on bearing (5) upper and via the center hole (61) that end cap (6) is axial lean out to compressor housing (7) outward, described shaft seal structure comprises axle sleeve (4) and lip seal (2), it is characterized in that: described axle sleeve (4) comprises sleeve body (41), described sleeve body (41) is set in that projecting shaft (1) is upper and both structures are drive fit, sleeve body (41) is at the near-end head near bearing (5) side and radially expand and establish and be configured with a disc (42), small gap (A) is maintained between the outer wall of described disc (42) and the inwall of described center hole (61), that described lip seal (2) is set in described sleeve body (41) is upper and be embedded in the shaft seal hole (31) in the middle of an end cover (3), and sealing end cap (3) is set in sleeve body (41) away from one end of bearing (5) and is connected and fixed with described end cap (6).
2.
the efficient shaft seal structure of a kind of helical-lobe compressor according to claim 1, it is characterized in that described end cover (3) comprises end cover body (32), described end cover body (32) towards the direction of disc (42) narrow contract to extend have an oil collecting ring (33), described oil collecting ring (33) offers oil trap (331) on outer circle wall body.
3.
the efficient shaft seal structure of a kind of helical-lobe compressor according to claim 2, it is characterized in that described disc (42) offers groove (421) on the surface towards described oil collecting ring (33) side, the termination of described oil collecting ring (33) probes into in described groove (421).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510096033.5A CN104747723A (en) | 2015-03-04 | 2015-03-04 | Efficient shaft sealing structure of screw compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510096033.5A CN104747723A (en) | 2015-03-04 | 2015-03-04 | Efficient shaft sealing structure of screw compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104747723A true CN104747723A (en) | 2015-07-01 |
Family
ID=53587829
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510096033.5A Pending CN104747723A (en) | 2015-03-04 | 2015-03-04 | Efficient shaft sealing structure of screw compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104747723A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105134601A (en) * | 2015-09-08 | 2015-12-09 | 无锡压缩机股份有限公司 | Oil seal structure for extension shaft of screw compressor |
| CN107100823A (en) * | 2017-04-06 | 2017-08-29 | 安徽博古特机电科技有限公司 | Vehicle-mounted air compressor enclosure axis oil enveloping structure |
| CN113200768A (en) * | 2021-05-13 | 2021-08-03 | 广东省绿革环保科技有限公司 | Kitchen waste treatment system |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5538258A (en) * | 1995-02-22 | 1996-07-23 | Alliedsignal Inc. | Oil seal for a high speed rotating shaft |
| CN201016395Y (en) * | 2007-03-22 | 2008-02-06 | 姚亮 | Rotary movable sealing apparatus |
| JP2010203422A (en) * | 2009-03-06 | 2010-09-16 | Anlet Co Ltd | Roots type vacuum pump |
| CN201901158U (en) * | 2010-12-20 | 2011-07-20 | 南车戚墅堰机车车辆工艺研究所有限公司 | Urban rail vehicle gearbox sealing structure |
| CN202125617U (en) * | 2011-06-29 | 2012-01-25 | 杭州开兰重工机械有限公司 | Improved sealing structure of output end of high-speed output shaft of wind power gear box |
| CN202942907U (en) * | 2012-12-10 | 2013-05-22 | 遵化市一超盛方重型机械厂 | Conical crusher oil collecting disc seal structure |
| CN203098365U (en) * | 2012-11-29 | 2013-07-31 | 沈阳沈联鼓风机制造有限公司 | Oil leakage prevention device of fan transmission group |
| CN204493719U (en) * | 2015-03-04 | 2015-07-22 | 苏州通润驱动设备股份有限公司 | The efficient shaft seal structure of helical-lobe compressor |
-
2015
- 2015-03-04 CN CN201510096033.5A patent/CN104747723A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5538258A (en) * | 1995-02-22 | 1996-07-23 | Alliedsignal Inc. | Oil seal for a high speed rotating shaft |
| CN201016395Y (en) * | 2007-03-22 | 2008-02-06 | 姚亮 | Rotary movable sealing apparatus |
| JP2010203422A (en) * | 2009-03-06 | 2010-09-16 | Anlet Co Ltd | Roots type vacuum pump |
| CN201901158U (en) * | 2010-12-20 | 2011-07-20 | 南车戚墅堰机车车辆工艺研究所有限公司 | Urban rail vehicle gearbox sealing structure |
| CN202125617U (en) * | 2011-06-29 | 2012-01-25 | 杭州开兰重工机械有限公司 | Improved sealing structure of output end of high-speed output shaft of wind power gear box |
| CN203098365U (en) * | 2012-11-29 | 2013-07-31 | 沈阳沈联鼓风机制造有限公司 | Oil leakage prevention device of fan transmission group |
| CN202942907U (en) * | 2012-12-10 | 2013-05-22 | 遵化市一超盛方重型机械厂 | Conical crusher oil collecting disc seal structure |
| CN204493719U (en) * | 2015-03-04 | 2015-07-22 | 苏州通润驱动设备股份有限公司 | The efficient shaft seal structure of helical-lobe compressor |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105134601A (en) * | 2015-09-08 | 2015-12-09 | 无锡压缩机股份有限公司 | Oil seal structure for extension shaft of screw compressor |
| CN107100823A (en) * | 2017-04-06 | 2017-08-29 | 安徽博古特机电科技有限公司 | Vehicle-mounted air compressor enclosure axis oil enveloping structure |
| CN113200768A (en) * | 2021-05-13 | 2021-08-03 | 广东省绿革环保科技有限公司 | Kitchen waste treatment system |
| CN113200768B (en) * | 2021-05-13 | 2022-11-04 | 广东省绿革环保科技有限公司 | Kitchen waste treatment system |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150701 |
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| WD01 | Invention patent application deemed withdrawn after publication |