CN102705373A - Negative-pressure-resistant oil-gas sealing device of end-cover sliding bearing - Google Patents
Negative-pressure-resistant oil-gas sealing device of end-cover sliding bearing Download PDFInfo
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- CN102705373A CN102705373A CN2012101659750A CN201210165975A CN102705373A CN 102705373 A CN102705373 A CN 102705373A CN 2012101659750 A CN2012101659750 A CN 2012101659750A CN 201210165975 A CN201210165975 A CN 201210165975A CN 102705373 A CN102705373 A CN 102705373A
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Abstract
The invention provides a negative-pressure-resistant oil-gas sealing device of an end-cover sliding bearing. The device comprises an air sealing cover, a first atmosphere balance pipe, a second atmosphere balance pipe, a first floating and sealing ring and a second floating and sealing ring, wherein the inner ring of the air sealing cover is provided with a first sealing groove and a second sealing groove; a lower part between the first sealing groove and the second sealing groove is provided with a first air vent; the lower part of the inner surface of the air sealing cover is provided with a second air vent; the first floating and sealing ring is mounted in the first sealing groove of the air sealing cover; the second floating and sealing ring is mounted in the second sealing groove of the air sealing cover; the first atmosphere balance pipe is connected with the first air vent of the air sealing cover; and the second atmosphere balance pipe is connected with the second air vent of the air sealing cover. According to the invention, two independent negative pressure balance systems are used, so that, negative-pressure-resistance capacity of oil-gas sealing is improved; floating and sealing rings provided by the invention use semi-half structures of spring stirrups and are characterized by convenient mounting and detaching; the floating and sealing rings can be floated on a radial direction in the air sealing cover grooves; sealing performance is reliable; and service life is long.
Description
Technical field
The present invention relates to a kind of seal arrangement, especially relate to the grease proofing gas sealing mechanism 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 that is used for the support motor rotor.In pot motor, because the effect of motor cooling fan, form bigger negative pressuren zone, cause inner oil of bearing and oil gas under suction function, to pass through floating the gentle capping of envelope ring to get into motor internal, cause electrical fault at the motor side that leans on of sliding bearing.Oil gas sealing means commonly used at present seals for the sealing gland lid that adopts band ramie wick.Because ramie wick and bearing radial gap are bigger, 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 takes place in sealing under high rotating speed, causes electrical fault.
Summary of the invention
In order to solve the above-mentioned technical problem that end cover type sliding bearing sealing exists, the present invention provide a kind of simple in structure, reliability is high, the grease proofing gas sealing mechanism of the anti-negative pressure of end cover type sliding bearing of good airproof performance.
The technological scheme that the present invention solves the problems of the technologies described above employing is: comprise the sealing gland lid; The first atmosphere balance tube; The second atmosphere balance tube, first fluctuate hermetical ring and second float and seal ring, and described sealing gland lid inner ring is provided with first seal groove and second seal groove; The bottom of covering between first seal groove and second seal groove in sealing gland is provided with first vent, and sealing gland interior surface bottom is provided with second vent;
First fluctuate hermetical ring is installed in first seal groove of sealing gland lid, and the second unsteady envelope ring is installed in second seal groove of sealing gland lid; The first atmosphere balance tube is connected with first vent of sealing gland lid, and the second atmosphere balance tube is connected with second vent of sealing gland lid.
The above-mentioned grease proofing gas sealing mechanism of the anti-negative pressure of end cover type sliding bearing, first vent and second vent of sealing gland lid are separate, are not communicated with.
Beneficial effect of the present invention: form the first road relief chamber between the present invention's first fluctuate hermetical ring and second seal ring; Form the second road 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 envelope ring of the present invention adopts and divides the half hitch structure, and and the gap that covers between the axle of seal groove and sealing part of sealing gland little, easy for installation, the Feng Huanke that floats radially floats in sealing gland lid groove, sealability is reliable, long service life.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the structural representation of sealing gland lid among the present invention.
Embodiment
Below in conjunction with accompanying drawing the present invention is further described.
As shown in Figure 1, the present invention includes sealing gland lid 7, the first atmosphere balance tubes 7; The second atmosphere balance tube 2; First fluctuate hermetical ring 4 and second floats and seals ring 5, and as shown in Figure 2, described sealing gland is covered 3 inner rings and is provided with first seal groove 33 and second seal groove 34; The bottom of covering between 3 first seal grooves 33 and second seal groove 34 in sealing gland is provided with first vent 31, and the bottom that sealing gland is covered 3 internal surfaces is provided with second vent 32.
First fluctuate hermetical ring 4 is installed in first seal groove 33 of sealing gland lid 3, and the second unsteady envelope ring 5 is installed in second seal groove 34 of sealing gland lid 3; First floats, and envelope is encircled the axial total backlash of 4 and first seal groove 33 and the axial total backlash of second unsteady envelope ring 5 and second seal groove 34 is 0.08-0.10mm; The first atmosphere balance tube 7 is connected with first vent 31 of sealing gland lid 3, and the second atmosphere balance tube 2 is connected with second vent 32 of sealing gland lid 3, and first vent 31 and second vent 32 are separate, are not communicated with.
During use, first envelope ring 4 and the second envelope ring 5 that floats that floats is enclosed within on the axle 9, first float envelope ring 4 and second float envelope ring 5 and its sealing part spools 9 between diametric clearance be 0.16-0.12mm, sealing gland is covered 3 and is installed on the bearing support 1.First floats forms the first road relief chamber 8 between envelope the ring 4 and second unsteady envelope ring 5; Form the second road decompression chamber 6 between the bearing support 1 gentle capping 3; Two relief chambers are respectively through first vent 31 on sealing gland lid 3, second vent 32 and the first atmosphere balance tube 7, second atmosphere balance tube 2 and the atmosphere; The balance negative pressure is to reach the purpose of oil gas sealing.
Claims (4)
1. the anti-negative pressure oil gas of end cover type sliding bearing seal arrangement; Comprise the sealing gland lid, the first atmosphere balance tube, the second atmosphere balance tube; It is characterized in that: also comprise first fluctuate hermetical ring and the second unsteady envelope ring; Described sealing gland lid inner ring is provided with first seal groove and second seal groove, and the bottom of covering between first seal groove and second seal groove in sealing gland is provided with first vent, and sealing gland interior surface bottom is provided with second vent;
First fluctuate hermetical ring is installed in first seal groove of sealing gland lid, and the second unsteady envelope ring is installed in second seal groove of sealing gland lid; The first atmosphere balance tube is connected with first vent of sealing gland lid, and the second atmosphere balance tube is connected with second vent of sealing gland lid.
2. the anti-negative pressure oil gas of end cover type sliding bearing as claimed in claim 1 seal arrangement is characterized in that: first vent and second vent of sealing gland lid are not communicated with.
3. the anti-negative pressure oil gas of end cover type sliding bearing as claimed in claim 1 seal arrangement is characterized in that: first floats, and envelope is encircled and the axial total backlash of the axial total backlash of first seal groove and second unsteady Feng Huanyu second seal groove is 0.08-0.10mm.
4. like claim 1 or the anti-negative pressure oil gas of 3 described end cover type sliding bearings seal arrangement, it is characterized in that: first floats, and envelope is encircled and the diametric clearance of the between centers of second unsteady its sealing part of Feng Huanyu is 0.06-0.12mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101659750A CN102705373A (en) | 2012-05-25 | 2012-05-25 | Negative-pressure-resistant oil-gas sealing device of end-cover sliding bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101659750A CN102705373A (en) | 2012-05-25 | 2012-05-25 | Negative-pressure-resistant oil-gas sealing device of end-cover sliding bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102705373A true CN102705373A (en) | 2012-10-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101659750A Pending CN102705373A (en) | 2012-05-25 | 2012-05-25 | Negative-pressure-resistant oil-gas sealing device of end-cover sliding bearing |
Country Status (1)
| Country | Link |
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| CN (1) | CN102705373A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103762774A (en) * | 2013-12-31 | 2014-04-30 | 中船重工电机科技股份有限公司 | Externally-arranged type rotating rectifier alternating current motor with oil-leakage preventing device |
| CN105257690A (en) * | 2015-11-16 | 2016-01-20 | 耒阳新达微科技有限公司 | Balance pressure reduction type bearing structure |
| CN105526188A (en) * | 2016-01-05 | 2016-04-27 | 武汉光谷科威晶激光技术有限公司 | Direct water cooling bearing structure of fan for fast axis flow CO2 laser |
| CN106026482A (en) * | 2016-08-10 | 2016-10-12 | 中车永济电机有限公司 | Dustproof device for alternating current traction motor bearing of high-power locomotive |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030102635A1 (en) * | 2001-03-13 | 2003-06-05 | Hideki Akita | Sealing device |
| CN2729436Y (en) * | 2004-06-29 | 2005-09-28 | 周映琳 | Anti-leakage oil structure of end cap type mobile bearing |
| CN200999800Y (en) * | 2006-06-27 | 2008-01-02 | 王澍 | End cap type slide bearing |
| CN102355079A (en) * | 2011-09-09 | 2012-02-15 | 兰州电机股份有限公司 | End cover type sliding bearing of high-speed motor |
| CN202646398U (en) * | 2012-05-25 | 2013-01-02 | 湖南崇德工业科技有限公司 | End cover type sliding bearing negative pressure resistance oil gas sealing device |
-
2012
- 2012-05-25 CN CN2012101659750A patent/CN102705373A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030102635A1 (en) * | 2001-03-13 | 2003-06-05 | Hideki Akita | Sealing device |
| CN2729436Y (en) * | 2004-06-29 | 2005-09-28 | 周映琳 | Anti-leakage oil structure of end cap type mobile bearing |
| CN200999800Y (en) * | 2006-06-27 | 2008-01-02 | 王澍 | End cap type slide bearing |
| CN102355079A (en) * | 2011-09-09 | 2012-02-15 | 兰州电机股份有限公司 | End cover type sliding bearing of high-speed motor |
| CN202646398U (en) * | 2012-05-25 | 2013-01-02 | 湖南崇德工业科技有限公司 | End cover type sliding bearing negative pressure resistance oil gas sealing device |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103762774A (en) * | 2013-12-31 | 2014-04-30 | 中船重工电机科技股份有限公司 | Externally-arranged type rotating rectifier alternating current motor with oil-leakage preventing device |
| CN105257690A (en) * | 2015-11-16 | 2016-01-20 | 耒阳新达微科技有限公司 | Balance pressure reduction type bearing structure |
| CN105257690B (en) * | 2015-11-16 | 2017-11-07 | 耒阳新达微科技有限公司 | A kind of balance decompression formula bearing arrangement |
| CN105526188A (en) * | 2016-01-05 | 2016-04-27 | 武汉光谷科威晶激光技术有限公司 | Direct water cooling bearing structure of fan for fast axis flow CO2 laser |
| CN106026482A (en) * | 2016-08-10 | 2016-10-12 | 中车永济电机有限公司 | Dustproof device for alternating current traction motor bearing of high-power locomotive |
| CN106026482B (en) * | 2016-08-10 | 2018-02-16 | 中车永济电机有限公司 | A kind of high-power locomotive AC traction electric motor bearing dustproof device |
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Application publication date: 20121003 |