CN2771563Y - Leakage-free hydraulic damper - Google Patents
Leakage-free hydraulic damper Download PDFInfo
- Publication number
- CN2771563Y CN2771563Y CN 200520089081 CN200520089081U CN2771563Y CN 2771563 Y CN2771563 Y CN 2771563Y CN 200520089081 CN200520089081 CN 200520089081 CN 200520089081 U CN200520089081 U CN 200520089081U CN 2771563 Y CN2771563 Y CN 2771563Y
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- oil cylinder
- metal
- wall
- oil
- connecting part
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- Expired - Fee Related
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Abstract
The utility model relates to a no-leakage hydraulic damper, which comprises an oil cylinder, a piston rod, a control valve, protecting covers and an oscillating bearing. The utility model is characterized in that the combining sites of all parts are all in fully sealed structure welded by metal in a sealing way; the combining sites are the combining site of the outer protecting cover and a front flange of a metal bellows, the combining site of the edge of the inner diameter of outer end of a guide ring of an oil cylinder and a back flange of the metal bellow, the combining site of a back flange of a compensating bellows weld by metal, the outer wall of the oil cylinder and the inner wall of the inner protecting cover, and the combining site of an end cover of the oil cylinder and the oil cylinder. The metal hard sealing is carried out between the movable piston rod and the inner wall of the guide ring of the oil cylinder and between the outer wall of a piston body and the inner wall of the oil cylinder. The design enables hydraulic oil with a minute quantity generated a gap of the piston rod and the oil cylinder to flow the metal sealing bellows and a closed loop of an oil cavity only. The damper does not have a non-metal sealing piece, the maintenance can be omitted, and the replenishment of oil is not needed within the service life of 30 years.
Description
Technical field
The utility model relates to main equipment and pipeline at a kind of no-leakage hydraulic damper that bears protection equipment and pipe safety under the burst load.
Background technique
Hydraulic damper is a kind of device to speed or acceleration sensitive, and it has and is subjected to than high acceleration, can pin during as impacts such as vibrations, earthquake, blasts and be subjected to the control displacement, and can unrestricted motion when low speed.Therefore it is widely used on critical facility such as thermal power station, nuclear power station, petrochemical industry, naval vessels and the pipeline, purpose is under the burst loading, under the percussion as unpredictable and accident etc., provide enough rigidity, prevent that the integrity of equipment, system is damaged.Under normal circumstances simultaneously, unaffected by the displacement that thermal expansion causes.It is to guarantee the indispensable nuclear safety equipment of reactor and circuit system pipeline and device security reliable operation.Yet all there is leakage problem in present various hydraulic dampers, although improve the material of seal ring, all bring frequent workload and corresponding maintenance cost to maintenance, even can be accidents caused.
Summary of the invention
The purpose of this utility model provides a kind of no-leakage hydraulic damper, and metal hard-sealing combines with metal bellows, has overcome problems such as the general Sealing of damper is aging, leakage of oil.
No-leakage hydraulic damper, comprise oil cylinder, piston, control valve, guard shield and joint shaft bearing, it is characterized in that all part junction positions are the connecting part of metallic seal welding: the connecting part of the rear flange of the rear flange connecting part of the connecting part of the forward flange of outer shield and metal bellows, internal diameter edge, oil cylinder guide ring outer end and metal bellows, metal solder compensation bellows and oil cylinder outer wall, interior guard shield inwall and the connecting part of cylinder cover and oil cylinder are the all-sealed structure of metallic seal welding; Gap between the movable part is metallic seal: the bar of piston and oil cylinder guide ring inwall, piston body outer wall and oil cylinder inner wall all adopt metal hard-sealing.
The design all adopts metallic seal welding, piston rod and oil cylinder employing metal hard-sealing that may leakage of oil, the micro-hydraulic oil that its gap produced can only flow in the metallic seal bellows, and enter oil pocket by the duct on the piston rod binding site of all parts.Also have two oil holes of end cap and tailpiece of the piston rod all to be arranged in the joint shaft bearing chamber, such loop is isolated from the outside hydraulic oil fully.Therefore, this damper can be realized freedom from repairs, is suitable for antidetonation, shock resistance type.Its advantage is:
1, oil and isolated from atmosphere can prevent oily oxidation deterioration.
2, anti-sealing and vapor in the atmosphere enter and cause the control unit corrosion in the damper.
3, the piston rod active part is coated fully, is immersed in the oil, prevents that piston rod from getting rusty and the dust foreign material are brought in the damper, and causes sealing surface destruction and control unit to block.
4, because damper is totally-enclosed, and metal seal nothing but, must repairing in the phase in use longevity in 30 years and change seal element.
Description of drawings
Accompanying drawing 1 is the structural representation of no-leakage hydraulic damper;
Embodiment
No-leakage hydraulic damper, comprise oil cylinder 9, piston 8, control valve 10, interior guard shield 7 and joint shaft bearing 1, it is characterized in that all part junction positions are the connecting part of metallic seal welding: the rear flange 11 of the internal diameter edge, guide ring outer end of the connecting part of the forward flange 2 of outer shield 3 and metal bellows 4, oil cylinder 9 and rear flange 6 connecting parts of metal bellows 4, metal solder compensation bellows 12 is the all-sealed structure that metallic seal is welded with the connecting part of oil cylinder 9 outer walls, interior guard shield 7 inwalls and the connecting part of cylinder cover 13 and oil cylinder 9; Gap between the movable part is metallic seal: the guide ring inwall of piston 8 bar positions and oil cylinder 9, piston 8 body region outer walls and oil cylinder inner wall all adopt metal hard-sealing.
Piston 8 is included as the piston rod and the piston body of one, settles control valve 10 in the piston body; Oil cylinder 9 is included as the guide ring of one, and the guide ring internal diameter holds piston rod.
Prevent to compensate the protection structure of ripple tubotorsion: at outer shield 3 inwalls axially equally distributed 4 feather keys 5 are arranged, 4 guiding grooves that cooperate are with it arranged, when guard shield 7 moves with piston 8 in making, can only move axially at the opposite position of interior guard shield 7 outer walls.
Because said structure, the micro-hydraulic oil that the slit produced between the cylinder cavity of this hydraulic damper and the piston rod, can only flow in the metallic seal bellows that is enclosed in the piston rod periphery, and enter in the oil pocket, form closed-circuit by the duct on the piston rod wall.During operation, because thermal expansion, seal bellows Compression and Expansion and piston rod move the Volume Changes that causes oil in the oil pocket, hydraulic oil enters in the compensated cavity of metal compensation bellows and oil cylinder and guard shield formation by control valve on the cylinder cover and respective channel, perhaps discharge, compensate.
Claims (2)
1, no-leakage hydraulic damper, comprise oil cylinder, piston rod, control valve, guard shield and joint shaft bearing, it is characterized in that all part junction positions are the connecting part of metallic seal welding: the connecting part of the rear flange of the rear flange connecting part of the connecting part of the forward flange of outer shield and metal bellows, internal diameter edge, oil cylinder guide ring outer end and metal bellows, metal solder compensation bellows and oil cylinder outer wall, interior guard shield inwall and the connecting part of cylinder cover and oil cylinder are the all-sealed structure of metallic seal welding; Gap between the movable part is metallic seal: the position bar of piston and oil cylinder guide ring inwall, piston body position outer wall and oil cylinder inner wall all adopt metal hard-sealing.
2, no-leakage hydraulic damper according to claim 1; it is characterized in that: the protection structure that prevents to compensate the ripple tubotorsion: at the outer shield inwall axially equally distributed a plurality of feather keys are arranged, the guiding groove that cooperates is with it arranged at the opposite position of interior guard shield outer wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520089081 CN2771563Y (en) | 2005-01-25 | 2005-01-25 | Leakage-free hydraulic damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520089081 CN2771563Y (en) | 2005-01-25 | 2005-01-25 | Leakage-free hydraulic damper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2771563Y true CN2771563Y (en) | 2006-04-12 |
Family
ID=36705353
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520089081 Expired - Fee Related CN2771563Y (en) | 2005-01-25 | 2005-01-25 | Leakage-free hydraulic damper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2771563Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100402883C (en) * | 2005-01-25 | 2008-07-16 | 杨铭 | No-leakage hydraulic damper |
| CN104088949A (en) * | 2014-07-06 | 2014-10-08 | 衡水宝力工程橡胶有限公司 | Fluid seal leakage-free damper |
| CN108050192A (en) * | 2017-11-29 | 2018-05-18 | 中国直升机设计研究所 | A kind of damper piston of integrated repairing structure |
-
2005
- 2005-01-25 CN CN 200520089081 patent/CN2771563Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100402883C (en) * | 2005-01-25 | 2008-07-16 | 杨铭 | No-leakage hydraulic damper |
| CN104088949A (en) * | 2014-07-06 | 2014-10-08 | 衡水宝力工程橡胶有限公司 | Fluid seal leakage-free damper |
| CN104088949B (en) * | 2014-07-06 | 2016-04-06 | 衡水宝力工程橡胶有限公司 | A kind of Fluid Sealing No leakage damper |
| CN108050192A (en) * | 2017-11-29 | 2018-05-18 | 中国直升机设计研究所 | A kind of damper piston of integrated repairing structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Shenyang Xintong Power Station Equipment Manufacturing Co., Ltd. Assignor: Yang Ming Contract fulfillment period: 2009.12.14 to 2017.9.5 Contract record no.: 2009210000306 Denomination of utility model: No-leakage hydraulic damper Granted publication date: 20060412 License type: Exclusive license Record date: 20091225 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2009.12.14 TO 2017.9.5; CHANGE OF CONTRACT Name of requester: SHENYANG XINTONG POWER STATION EQUIPMENT MANUFACTU Effective date: 20091225 |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060412 |