CN101355242A - Reactive movable sealing piece for pneumatic compartment straightly-moving type circuit breaker - Google Patents
Reactive movable sealing piece for pneumatic compartment straightly-moving type circuit breaker Download PDFInfo
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- CN101355242A CN101355242A CNA2008100213036A CN200810021303A CN101355242A CN 101355242 A CN101355242 A CN 101355242A CN A2008100213036 A CNA2008100213036 A CN A2008100213036A CN 200810021303 A CN200810021303 A CN 200810021303A CN 101355242 A CN101355242 A CN 101355242A
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- axle
- circuit breaker
- magnetic
- reciprocating
- reciprocating dynamic
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- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The invention relates to a reciprocating dynamic sealing element for a direct-acting circuit breaker in an aerated compartment, which belongs to the technical field of the sealing of middle-voltage electrical equipment. The reciprocating dynamic sealing element is mainly characterized in that the reciprocating dynamic sealing element completely overcomes the various disadvantages of the prior reciprocating dynamic sealing element with a bellows structure existing in the use through arranging a shaft housing with a sliding bearing and arranging a magnetic liquid type dynamic sealing component in the shaft housing. A sealing structural member of the invention is supported by the sliding bearing and can be twisted; through framework oil seals, the reciprocating dynamic sealing element can effectively prevent a magnetic fluid from being taken out of a sealing cavity with the reciprocating movement of a shaft due to the adhesiveness further to affect sealing performance; and the shaft of the reciprocating dynamic sealing element is provided with a step which can effectively prevent the magnetic fluid from being taken into the aerated compartment further to pollute insulating medium. The reciprocating dynamic sealing element has the advantages that the reciprocating dynamic sealing element has a simple structure and reliable performance, can substitute the prior product, and contribute to improving the quality of the direct-acting circuit breaker of the aerated compartment.
Description
Technical field
The present invention relates to a kind of reciprocating dynamic seal spare of charging compartment Direct Action Type circuit breaker, the technical field of sealing technology of piezoelectricity gas equipment in belonging to.
Background technology
The reciprocating dynamic seal spare of charging compartment Direct Action Type circuit breaker is to be fixed on the hermatic door of charging compartment, the existing reciprocating dynamic seal structure that is used for the sealing of charging compartment circuit breaker gas, be to adopt all-welded bellows structure, specifically comprise bellows, run through the axle of bellows, place bellows end and between centers in the hermatic door fixing through welding, there is following shortcoming in the reciprocating dynamic seal spare of this structure under service condition: 1, the antitorque kinetic force of bellows is poor, makes Bellow Expansion Joint Failure cause seepage easily if any torsion; 2, to the material quality requirement height of bellows, the small sand holes defective that is difficult to see if any naked eyes in the material all can cause seepage; 3, bellows is through repeatedly reciprocating motion easy damaged, and mechanical endurance is not high.
Seen the movable sealing that has magnetic fluid to be used for rotation axis, but when being used for reciprocating shaft seal, magnetic fluid takes annular seal space out of because of existing magnetic fluid to adhere to reciprocal axle phenomenon, can cause magnetic fluid to run off, influence sealing property, magnetic fluid enters in the charging compartment and can pollute dielectric simultaneously.
Summary of the invention
The reciprocating dynamic seal spare that the purpose of this invention is to provide a kind of charging compartment Direct Action Type circuit breaker, overcome the existing reciprocating dynamic seal spare above shortcomings that adopt full welding bellows structure, realize that energy consumption is low, have antitorque moving property and self-repairability, and long service life.Can prevent effectively simultaneously that magnetic fluid runs off, pollutes the dielectric in the charging compartment.
The objective of the invention is to be achieved through the following technical solutions, a kind of reciprocating dynamic seal spare of charging compartment Direct Action Type circuit breaker, comprise axle, the both ends of axle have external screw thread, it is characterized in that described reciprocating dynamic seal spare is provided with non-magnetic material axle sleeve, two ends are provided with sliding bearing in the axle sleeve, axle runs through the sliding bearing in the axle sleeve, adjacent magnetic liquid formula dynamic sealing assembly and the outside framework oil seal of being provided with in the axle sleeve between two sliding bearings.
The axle sleeve internal thread of the sliding bearing outer end of one end connects non-magnetic material gland, after axle ran through the interior sliding bearing of axle sleeve, its both ends were passed the gland centre bore of an end sliding bearing outer end, the sleeve end centre bore of an end sliding bearing outer end respectively.
Setting of axle sleeve periphery and axle sleeve are the ring flange of one, on the inner face of ring flange seal groove are set.
Magnetic liquid formula dynamic sealing assembly is made of the magnetic pole and the magnetic liquid at permanent magnet, permanent magnet two ends, and the static seal of magnetic pole and axle sleeve adopts the O RunddichtringO; Axle is a matched in clearance with the inwall of magnetic pole, and magnetic liquid is adopted in movable sealing.
The magnetic pole inwall has circumferential recess and has the inclined-plane, and the inclined-plane has magnetic liquid in magnetic pole is gapped with the institute of axle in the higher charging compartment of air pressure.
Set gradually the back-up ring and the interstage sleeve of non-magnetic material in the magnetic liquid formula dynamic sealing assembly in the axle sleeve of an end magnetic pole and sliding bearing.
The axial region of corresponding interstage sleeve is provided with step.
The present invention has the axle sleeve of sliding bearing and magnetic liquid formula dynamic sealing assembly is set in axle sleeve by setting, the various deficiencies that the reciprocating dynamic seal spare of existing bellows structure in use exists have thoroughly been overcome, because seal structural part dynamic friction sealing pair of the present invention has and does not have the friction self-lubricating property, mechanical endurance height; During breaker operator, only need overcome the required resistance square of Switch main body operation, need not to overcome the secondary additional resistance square of translation seal, thereby energy consumption be low; The magnetic fluid sealing pair of rotational sealing structure spare of the present invention has self-repair function, promptly ought be in particular cases, when the inner and outer air pressure difference of charging compartment is higher than the rated designs amount, the magnetic fluid sealing ring can be destroyed, when the inner and outer air pressure difference of charging compartment was lower than the rated designs amount, sealing ring can restore automatically, keeps its original sealing property, and metal bellow type rotational sealing structure spare is owing to being mechanical structure, in case must change because the draught head effect is destroyed; Seal structural part of the present invention supports because of adopting sliding bearing, can twist; The present invention can prevent effectively that by outside framework oil seal being taken out of annular seal space owing to the tack of magnetic fluid with the reciprocating motion of axle influences sealing property outward;
Axle of the present invention is provided with step, can prevent effectively that magnetic fluid is brought into charging compartment and pollutes dielectric.The present invention is simple in structure, dependable performance, and alternative existing product helps improving the quality of charging compartment Direct Action Type circuit breaker.
Description of drawings
Fig. 1 is fixed on sectional structure schematic diagram on the hermatic door for the present invention;
Among the figure, 1 hermatic door, 2 fixtures, 3 axle sleeves, 4 glands, 5,6 sliding bearings, 7 permanent magnets, 8 O RunddichtringOs, 9 magnetic poles, 10 magnetic liquids, 11 interstage sleeves, 12 back-up rings, 13 outside framework oil seals, 14O RunddichtringO, 15 steps.
Embodiment
Further specify the present invention in conjunction with the accompanying drawings and embodiments, as shown in Figure 1, the present invention is made up of non-magnetic material axle sleeve 3, non-magnetic material gland 4, high magnetic conductive material axle 5, sliding bearing 6, permanent magnet 7, O RunddichtringO 8, magnetic pole 9, magnetic liquid 10, non-magnetic material interstage sleeve 11, non-magnetic material back-up ring 12, outside framework oil seal 13, O RunddichtringO 14.
Its operation principle is, axle 5 one ends connect with breaker operation mechanism through screw thread, the reciprocating motion of operating mechanism axis of traction 5 (run through charging compartment outside to inner) realize the charging compartment inner breaker branch, close, the reciprocating motion stroke of axle 5 is limited by interstage sleeve 11, because of axle 5 is high magnetic conductive material, as back-up ring 12 is not set, then because the step magnetization of axle 5 can influence the magnetic fluid sealing ring that is adjacent, so back-up ring 12 is set, therefore the reciprocating stroke of axle 5 is limited by interstage sleeve 11.
Sealing of the present invention divides three positions, and the present invention uses the bottom bracket axle 3 and the fixedly static seal of hermatic door 1 to adopt O RunddichtringO 14; Magnetic pole 9 adopts O RunddichtringO 8 with the static seal of axle sleeve 3; Axle 5 adopts magnetic liquid 10 with the movable sealing of magnetic pole 9.Adopt outside framework oil seal 13 to stop magnetic liquids in the reciprocating motion process, to be taken out of, utilize step 15 on the axle 5 to stop magnetic liquids to be attached to axle 5 and in the reciprocating motion process, be brought in the gas tank, influence the charging compartment insulation property owing to be attached to axle 5.Adopt outside framework oil seal 13 to stop magnetic liquids in the reciprocating motion process, to be taken out of, utilize step 15 on the axle 5 to stop magnetic liquids to be attached to axle 5 and in the reciprocating motion process, be brought in the gas tank, influence the charging compartment insulation property owing to be attached to axle 5.(foreign study shows, the movable sealing performance of magnetic fluid can be not destroyed when reciprocating speed ≯ 20m/s, the branch sum velocity ≯ 20m/s of actual circuit breaker.)
The present invention's design between magnetic pole 9 and axle 5 has fit clearance, magnetic pole 9 inwalls have circumferential recess and have the inclined-plane, the inclined-plane is towards the higher charging compartment inside of air pressure, has magnetic liquid 10 in the fit clearance between magnetic pole 9 and axle 5, because magnetic pole crown place magnetic field force is the strongest, magnetic liquid is owing to the response characteristic to magnetic field concentrates on the crown place, form " O " type liquid seal ring one by one in the fit clearance between magnetic pole 9 and axle 5, fit clearance is full of, stops sealed medium to pass through from the gap.Because magnetic liquid 10 has good flowability, owing to its response characteristic to magnetic field, when axle 5 reciprocating motions, the magnetic fluid sealing ring can be not destroyed simultaneously, thereby realized not having friction self-lubricating movable sealing.
Claims (7)
1, a kind of reciprocating dynamic seal spare of charging compartment Direct Action Type circuit breaker, comprise axle, the both ends of axle have external screw thread, it is characterized in that, described reciprocating dynamic seal spare is provided with non-magnetic material axle sleeve, two ends are provided with sliding bearing in the axle sleeve, and axle runs through the sliding bearing in the axle sleeve, adjacent magnetic liquid formula dynamic sealing assembly and the outside framework oil seal of being provided with in the axle sleeve between two sliding bearings.
2, the reciprocating dynamic seal spare of charging compartment Direct Action Type circuit breaker according to claim 1, it is characterized in that, the axle sleeve internal thread of the sliding bearing outer end of one end connects non-magnetic material gland, after axle ran through the interior sliding bearing of axle sleeve, its both ends were passed the gland centre bore of an end sliding bearing outer end, the sleeve end centre bore of an end sliding bearing outer end respectively.
3, the reciprocating dynamic seal spare of charging compartment Direct Action Type circuit breaker according to claim 1 is characterized in that, setting of axle sleeve periphery and axle sleeve are the ring flange of one, on the inner face of ring flange seal groove are set.
4, the reciprocating dynamic seal spare of charging compartment Direct Action Type circuit breaker according to claim 1, it is characterized in that, magnetic liquid formula dynamic sealing assembly is made of the magnetic pole and the magnetic liquid at permanent magnet, permanent magnet two ends, and the static seal of magnetic pole and axle sleeve adopts the O RunddichtringO; Axle is a matched in clearance with the inwall of magnetic pole, and magnetic liquid is adopted in movable sealing.
5, the reciprocating dynamic seal spare of charging compartment Direct Action Type circuit breaker according to claim 4, it is characterized in that, the magnetic pole inwall has circumferential recess and has the inclined-plane, and the inclined-plane has magnetic liquid in magnetic pole is gapped with the institute of axle in the higher charging compartment of air pressure.
6, the reciprocating dynamic seal spare of charging compartment Direct Action Type circuit breaker according to claim 1 is characterized in that, sets gradually the back-up ring and the interstage sleeve of non-magnetic material in the magnetic liquid formula dynamic sealing assembly in the axle sleeve of an end magnetic pole and sliding bearing.
7, the reciprocating dynamic seal spare of charging compartment Direct Action Type circuit breaker according to claim 6 is characterized in that, on the axial region of corresponding interstage sleeve step is set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100213036A CN101355242A (en) | 2008-07-31 | 2008-07-31 | Reactive movable sealing piece for pneumatic compartment straightly-moving type circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100213036A CN101355242A (en) | 2008-07-31 | 2008-07-31 | Reactive movable sealing piece for pneumatic compartment straightly-moving type circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101355242A true CN101355242A (en) | 2009-01-28 |
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ID=40307896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100213036A Pending CN101355242A (en) | 2008-07-31 | 2008-07-31 | Reactive movable sealing piece for pneumatic compartment straightly-moving type circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101355242A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101799075A (en) * | 2010-04-12 | 2010-08-11 | 北京交通大学 | Rotation shaft combined sealing device |
| CN109462174A (en) * | 2017-09-06 | 2019-03-12 | 许继集团有限公司 | Translation seal device and breaker, the gas-filling cabinet for using the device |
| CN112805891A (en) * | 2018-10-09 | 2021-05-14 | 三菱电机株式会社 | Gas insulated switchgear |
-
2008
- 2008-07-31 CN CNA2008100213036A patent/CN101355242A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101799075A (en) * | 2010-04-12 | 2010-08-11 | 北京交通大学 | Rotation shaft combined sealing device |
| CN109462174A (en) * | 2017-09-06 | 2019-03-12 | 许继集团有限公司 | Translation seal device and breaker, the gas-filling cabinet for using the device |
| CN109462174B (en) * | 2017-09-06 | 2020-07-28 | 许继集团有限公司 | Direct-acting sealing device and breaker and gas-filled cabinet using same |
| CN112805891A (en) * | 2018-10-09 | 2021-05-14 | 三菱电机株式会社 | Gas insulated switchgear |
| CN112805891B (en) * | 2018-10-09 | 2023-05-30 | 三菱电机株式会社 | Gas-insulated switchgear |
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Open date: 20090128 |