CN1811220A - No-leakage hydraulic damper - Google Patents
No-leakage hydraulic damper Download PDFInfo
- Publication number
- CN1811220A CN1811220A CN 200510045761 CN200510045761A CN1811220A CN 1811220 A CN1811220 A CN 1811220A CN 200510045761 CN200510045761 CN 200510045761 CN 200510045761 A CN200510045761 A CN 200510045761A CN 1811220 A CN1811220 A CN 1811220A
- Authority
- CN
- China
- Prior art keywords
- oil cylinder
- connecting part
- piston
- wall
- oil
- 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.)
- Granted
Links
- 239000002184 metal Substances 0.000 claims abstract description 17
- 238000007789 sealing Methods 0.000 claims abstract description 9
- 238000003466 welding Methods 0.000 claims abstract description 5
- 229910000679 solder Inorganic materials 0.000 claims description 3
- 210000003746 feather Anatomy 0.000 claims description 2
- 239000003921 oil Substances 0.000 abstract description 28
- 239000010720 hydraulic oil Substances 0.000 abstract description 5
- 238000012423 maintenance Methods 0.000 abstract description 3
- 229910052755 nonmetal Inorganic materials 0.000 abstract 1
- 230000001133 acceleration Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 210000000746 body region Anatomy 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000009527 percussion Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
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- Fluid-Damping Devices (AREA)
Abstract
The no-leakage hydraulic damper includes oil cylinder, piston rod, control valve, protecting hood and joint bearing, and features that all the edges of the combined parts are completely sealed welding structure. The maybe micro hydraulic oil leaked through the interval between the piston and the oil cylinder can flow only to the closed loop of sealed metal corrugated pipe and oil cavity. The damper has no non-metal sealing part, needs no maintenance and needs no oil replenishment in its service life.
Description
Technical field
The present invention relates to bear on main equipment and the pipeline safety installations of burst load, a kind of no-leakage hydraulic damper.
Background technique
Hydraulic damper is a kind of device to speed or acceleration sensitive, and its effect is can pin during as impacts such as vibrations, earthquake, blasts and be subjected to the control displacement when being subjected to than high acceleration, 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 situation of burst load surge, 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 circuit system pipeline and the indispensable nuclear safety equipment of device security reliable operation of guaranteeing reactor.Yet all there is leakage problem in present various hydraulic dampers, although improve the material of seal ring, still bring frequent workload and corresponding maintenance cost to maintenance, even can be accidents caused.
Summary of the invention
The purpose of this invention is to provide a kind of no-leakage hydraulic damper, metal hard-sealing combines with full clearance seal, 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: rear flange and oil cylinder outer wall, the connecting part of interior guard shield inwall and the connecting part of cylinder cover and oil cylinder 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; Gap between the movable part: 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 the piston rod and the oil cylinder of metallic seal welding, possibility leakage of oil to adopt metal hard-sealing to combine the binding site of all parts, the micro-hydraulic oil that its gap produced can only flow in the metallic seal bellows, and enters oil pocket by the duct on the piston rod.Also have two pump nozzles 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 application.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.
Appended drawings 1 is the structural representation of no-leakage hydraulic damper;
Embodiment
No-leakage hydraulic damper, comprise oil cylinder 9, piston 8, control valve 10, outer shield 3, interior guard shield 7 and joint shaft bearing 1, it is characterized in that all part edge binding sites are the all-sealed structure 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 and 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 bar 8 of piston all adopts metal hard-sealing with guide ring inwall, piston 8 body region outer walls and oil cylinder 9 inwalls of oil cylinder 9.
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: axially equally distributed 4 feather keys 5 are arranged at outer shield 3 inwalls; opposite position at interior guard shield 7 outer walls has the guiding groove that cooperates with it; when guard shield 7 moves with piston 8 in making, can only move axially, and can not radially rotate.
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 of oil in the oil pocket that causes, 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 edge binding sites are the connecting part of metallic seal welding: rear flange and oil cylinder outer wall, the connecting part of interior guard shield inwall and the connecting part of cylinder cover and oil cylinder 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; 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.
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 |
|---|---|---|---|
| CNB200510045761XA CN100402883C (en) | 2005-01-25 | 2005-01-25 | No-leakage hydraulic damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510045761XA CN100402883C (en) | 2005-01-25 | 2005-01-25 | No-leakage hydraulic damper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1811220A true CN1811220A (en) | 2006-08-02 |
| CN100402883C CN100402883C (en) | 2008-07-16 |
Family
ID=36844295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200510045761XA Expired - Fee Related CN100402883C (en) | 2005-01-25 | 2005-01-25 | No-leakage hydraulic damper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100402883C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102619918A (en) * | 2012-02-20 | 2012-08-01 | 东南大学 | No-leakage rotatable and axially movable fluid damper |
| CN104061267A (en) * | 2014-07-08 | 2014-09-24 | 江苏振龙减震器有限公司 | Dustproof rear 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 |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3753196B2 (en) * | 1996-04-09 | 2006-03-08 | カヤバ工業株式会社 | Rod guide molding method |
| CN2291531Y (en) * | 1997-06-20 | 1998-09-16 | 中国工程物理研究院机械制造工艺研究所 | Leak protection hydraulic damper |
| JP2002242981A (en) * | 2001-02-15 | 2002-08-28 | Kayaba Ind Co Ltd | Seal structure for hydraulic shock absorber |
| JP2004068840A (en) * | 2002-08-01 | 2004-03-04 | Showa Corp | Vehicular hydraulic damper |
| CN2580206Y (en) * | 2002-09-06 | 2003-10-15 | 张小虎 | Closed hydraulic damper |
| CN2651560Y (en) * | 2003-10-16 | 2004-10-27 | 上海理工大学附属工厂 | Hydraulic damper for nuclear power station |
| CN2771563Y (en) * | 2005-01-25 | 2006-04-12 | 杨铭 | Leakage-free hydraulic damper |
-
2005
- 2005-01-25 CN CNB200510045761XA patent/CN100402883C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102619918A (en) * | 2012-02-20 | 2012-08-01 | 东南大学 | No-leakage rotatable and axially movable fluid damper |
| CN104061267A (en) * | 2014-07-08 | 2014-09-24 | 江苏振龙减震器有限公司 | Dustproof rear 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100402883C (en) | 2008-07-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| 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 change Contract record no.: 2009210000306 Denomination of invention: No-leakage hydraulic damper Granted publication date: 20080716 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 |
|
| ASS | Succession or assignment of patent right |
Owner name: YANG SHIKUAN YANG FENG YANG DONG YANG WEI YANG YUC |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20100525 Address after: Shenyang Street Moral Development Zone in Shenyang City, Liaoning province 110036 No. 18 Xin Tong Station Equipment Manufacturing Company Co-patentee after: Yang Shikuan Patentee after: Yang Ming Co-patentee after: Yang Feng Co-patentee after: Yang Dong Co-patentee after: Yang Wei Co-patentee after: Yang Yucheng Co-patentee after: Liu Sulan Address before: Shenyang Street Moral Development Zone in Shenyang City, Liaoning province 110036 No. 18 Xin Tong Station Equipment Manufacturing Company Patentee before: Yang Ming |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080716 Termination date: 20120125 |