CN202646398U - End cover type sliding bearing negative pressure resistance oil gas sealing device - Google Patents
End cover type sliding bearing negative pressure resistance oil gas sealing device Download PDFInfo
- Publication number
- CN202646398U CN202646398U CN2012202395990U CN201220239599U CN202646398U CN 202646398 U CN202646398 U CN 202646398U CN 2012202395990 U CN2012202395990 U CN 2012202395990U CN 201220239599 U CN201220239599 U CN 201220239599U CN 202646398 U CN202646398 U CN 202646398U
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- sealing
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- negative pressure
- gas sealing
- type sliding
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- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The utility model provides an end cover type sliding bearing negative pressure resistance oil gas sealing device, which comprises a gas sealing cover, a first atmosphere balance pipe, a second atmosphere balance pipe, a first floating sealing ring and a second floating sealing ring, wherein the inner ring of the gas sealing cover is provided with a first sealing groove and a second sealing groove, a first vent hole is arranged at the lower part between the first sealing groove and the second sealing groove, the lower part of the inner surface of the gas sealing cover is provided with a second vent hole, the first floating sealing ring is arranged in the first sealing groove of the gas sealing cover, the second floating sealing ring is arranged in the second sealing groove of the gas sealing cover, the first atmosphere balance pipe is connected with the first vent hole of the gas sealing cover, and the second atmosphere balance pipe is connected with the second vent hole of the gas sealing pipe. The end cover type sliding bearing negative pressure resistance oil gas sealing device adopts two independent negative pressure balance systems, and the negative pressure resistance capability of the oil gas sealing is improved. The floating sealing ring of the end cover type sliding bearing negative pressure resistance oil gas sealing device adopts the spring hoop ring half dividing structure, the mounting and the dismounting are convenient, the floating sealing ring can realize the radial floating in the gas sealing cover groove, the sealing performance is reliable, and the service life is long.
Description
Technical field
The utility model relates to a kind of seal arrangement, especially relates to the anti-oil-gas sealing device of the anti-negative pressure of a kind of end cover type sliding bearing.
Background technique
The end cover type sliding bearing is the vitals for supporting motor rotor.In pot motor because the effect of motor cooling fan, sliding bearing form larger negative pressuren zone by motor side, cause the oil of bearing inside and oil gas under suction function, to pass through the gentle capping of seal ring of floating and enter motor internal, cause electrical fault.Oil gas sealing means commonly used is for adopting the sealing gland lid with the ramie wick to seal at present.Because ramie wick and bearing radial gap are larger, and reduced-pressure zone is only arranged one, the air pressure balance structure is too simple, negative pressure resistivity to motor side is relatively poor, the general motor that only is suitable for the little negative pressure of the slow-speed of revolution, oil and gas leakage very easily occurs in sealing under high rotating speed, causes electrical fault.
The model utility content
The above-mentioned technical problem that exists in order to solve end cover type sliding bearing sealing, the utility model provide a kind of simple in structure, reliability is high, the anti-oil-gas sealing device of the anti-negative pressure of end cover type sliding bearing of good airproof performance.
The technical scheme in the invention for solving the above technical problem is: comprise the sealing gland lid, the first atmosphere balance tube, the second atmosphere balance tube, the first fluctuate hermetical ring and the second unsteady seal ring, described sealing gland lid inner ring is provided with the first seal groove and the second seal groove, the bottom of covering between the first seal groove and the second seal groove in sealing gland is provided with the first vent, and sealing gland interior surface bottom is provided with the second vent;
The first fluctuate hermetical ring is installed in the first seal groove of sealing gland lid, and the second unsteady seal ring is installed in the second seal groove of sealing gland lid; The first atmosphere balance tube is connected with the first vent of sealing gland lid, and the second atmosphere balance tube is connected with the second vent of sealing gland lid.
The above-mentioned anti-negative pressure of end cover type sliding bearing is prevented oil-gas sealing device, and the first vent and second vent of sealing gland lid are separate, are not communicated with.
The beneficial effects of the utility model: form the first relief chamber between the utility model the first fluctuate hermetical ring and the second seal ring, form the second relief chamber between sealing gland lid and the bearing support, twice are the negative-pressure balancing system independently, has improved the anti-negative pressure ability of oil gas sealing, and sealability is reliable; Unsteady seal ring of the present utility model adopts minute half structure, and and the gap that covers between the axle of seal groove and sealing place of sealing gland little, easy for installation, unsteady seal ring can radially be floated in the sealing gland cover slot, sealability is reliable, long service life.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the structural representation of sealing gland lid in the utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described.
As shown in Figure 1, the utility model comprises sealing gland lid 3, the first atmosphere balance tube 7, the second atmosphere balance tube 2, the first fluctuate hermetical ring 4 and the second unsteady seal ring 5, as shown in Figure 2, described sealing gland is covered 3 inner rings and is provided with the first seal groove 33 and the second seal groove 34, the bottom of covering between 3 first seal grooves 33 and the second seal groove 34 in sealing gland is provided with the first vent 31, and the bottom that sealing gland is covered 3 internal surfaces is provided with the second vent 32.
The first fluctuate hermetical ring 4 is installed in the first seal groove 33 of sealing gland lid 3, and the second unsteady seal ring 5 is installed in the second seal groove 34 of sealing gland lid 3; The axial total backlash of the first fluctuate hermetical ring 4 and the first seal groove 33 and the second axial total backlash that floats seal ring 5 and the second seal groove 34 are 0.08-0.10mm; The first atmosphere balance tube 7 is connected with the first vent 31 of sealing gland lid 3, and the second atmosphere balance tube 2 is connected with the second vent 32 of sealing gland lid 3, and the first vent 31 and the second vent 32 are separate, are not communicated with.
During use, the first fluctuate hermetical ring 4 and the second unsteady seal ring 5 are enclosed within on the axle 9, and the diametric clearance between the axle 9 of the first fluctuate hermetical ring 4 and the second unsteady seal ring 5 and its sealing place is 0.06-0.12mm, and sealing gland lid 3 is installed on the bearing support 1.The first fluctuate hermetical ring 4 and second floats and forms first relief chamber 8 between the seal ring 5, form second decompression chamber 6 between the bearing support 1 gentle capping 3, two relief chambers are communicated with atmosphere by the first vent 31, the second vent 32 and the first atmosphere balance tube 7, the second atmosphere balance tube 2 on sealing gland lid 3 respectively, the balance negative pressure is to reach the purpose of oil gas sealing.
Claims (4)
1. anti-negative pressure oil-gas sealing device of end cover type sliding bearing, comprise the sealing gland lid, the first atmosphere balance tube, the second atmosphere balance tube, it is characterized in that: also comprise the first fluctuate hermetical ring and the second unsteady seal ring, described sealing gland lid inner ring is provided with the first seal groove and the second seal groove, and the bottom of covering between the first seal groove and the second seal groove in sealing gland is provided with the first vent, and sealing gland interior surface bottom is provided with the second vent;
The first fluctuate hermetical ring is installed in the first seal groove of sealing gland lid, and the second unsteady seal ring is installed in the second seal groove of sealing gland lid; The first atmosphere balance tube is connected with the first vent of sealing gland lid, and the second atmosphere balance tube is connected with the second vent of sealing gland lid.
2. the anti-negative pressure oil-gas sealing device of end cover type sliding bearing as claimed in claim 1 is characterized in that: the first vent and second vent of sealing gland lid are not communicated with.
3. the anti-negative pressure oil-gas sealing device of end cover type sliding bearing as claimed in claim 1 is characterized in that: the axial total backlash of the first fluctuate hermetical ring and the first seal groove and the second axial total backlash that floats seal ring and the second seal groove are 0.08-0.10mm.
4. such as claim 1 or the anti-negative pressure oil-gas sealing device of 3 described end cover type sliding bearings, it is characterized in that: the diametric clearance of the between centers of the first fluctuate hermetical ring and the second unsteady seal ring and its sealing place is 0.06-0.12mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202395990U CN202646398U (en) | 2012-05-25 | 2012-05-25 | End cover type sliding bearing negative pressure resistance oil gas sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202395990U CN202646398U (en) | 2012-05-25 | 2012-05-25 | End cover type sliding bearing negative pressure resistance oil gas sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202646398U true CN202646398U (en) | 2013-01-02 |
Family
ID=47415510
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012202395990U Expired - Lifetime CN202646398U (en) | 2012-05-25 | 2012-05-25 | End cover type sliding bearing negative pressure resistance oil gas sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202646398U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102705373A (en) * | 2012-05-25 | 2012-10-03 | 湖南崇德工业科技有限公司 | Negative-pressure-resistant oil-gas sealing device of end-cover sliding bearing |
| CN107546903A (en) * | 2016-06-23 | 2018-01-05 | 中电电机股份有限公司 | A kind of high-speed electric expreess locomotive leak-proof arrangement |
-
2012
- 2012-05-25 CN CN2012202395990U patent/CN202646398U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102705373A (en) * | 2012-05-25 | 2012-10-03 | 湖南崇德工业科技有限公司 | Negative-pressure-resistant oil-gas sealing device of end-cover sliding bearing |
| CN107546903A (en) * | 2016-06-23 | 2018-01-05 | 中电电机股份有限公司 | A kind of high-speed electric expreess locomotive leak-proof arrangement |
| CN107546903B (en) * | 2016-06-23 | 2019-08-27 | 中电电机股份有限公司 | A kind of high-speed motor leak-proof arrangement |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 411101 No.9, Chayuan Road, high tech Zone, Xiangtan City, Hunan Province Patentee after: Hunan Chongde Technology Co., Ltd Address before: 411101 twin Horse Industrial Park, Hunan, Xiangtan Patentee before: HUNAN SUND INDUSTRIAL AND TECHNOLOGICAL Co.,Ltd. |
|
| CP03 | Change of name, title or address | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130102 |
|
| CX01 | Expiry of patent term |