CN2179492Y - Compound dynamic seal of superhigh pressure reciprocating rod - Google Patents
Compound dynamic seal of superhigh pressure reciprocating rod Download PDFInfo
- Publication number
- CN2179492Y CN2179492Y CN 92220348 CN92220348U CN2179492Y CN 2179492 Y CN2179492 Y CN 2179492Y CN 92220348 CN92220348 CN 92220348 CN 92220348 U CN92220348 U CN 92220348U CN 2179492 Y CN2179492 Y CN 2179492Y
- Authority
- CN
- China
- Prior art keywords
- sealing
- rocker arm
- runddichtringo
- pressure
- sealing washer
- 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.)
- Expired - Fee Related
Links
- 150000001875 compounds Chemical class 0.000 title claims abstract description 8
- 238000007789 sealing Methods 0.000 claims abstract description 37
- 239000002131 composite material Substances 0.000 claims abstract description 4
- 230000005540 biological transmission Effects 0.000 claims description 4
- 210000004907 gland Anatomy 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- -1 polytetrafluoroethylene Polymers 0.000 abstract 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 abstract 1
- 239000004810 polytetrafluoroethylene Substances 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 7
- 239000004809 Teflon Substances 0.000 description 3
- 229920006362 Teflon® Polymers 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004568 cement Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Landscapes
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The utility model provides a compound seal structure that moves, at the tip by O shape sealing washer, overcoat polytetrafluoroethylene L shape sealing washer constitution sealing washer group, when the pressurized back, produce compound outside tension, make L shape sealing washer and working face paste tightly, obtain high leakproofness. When the working pressure is higher, except that the end part adopts an O-shaped L-shaped sealing ring group, the middle part adopts an expanding tire type sealing group formed by a throttle valve (small hole) and a check valve to form a composite dynamic sealing structure. The two sealing modes can be used independently or in a combined way.
The utility model has the characteristics of simple structure, pressure stability, it is convenient to make, and long service life can improve under the original size condition and exert oneself.
Description
The field that the compound motive sealing of ultrahigh pressure rocker arm of the present utility model relates to the motive sealing of a kind of hydraulic transmission rocker arm is to having rocker arm high pressure dynamic sealing and the motive sealing of the ultrahigh pressure rocker arm lining filler combined type substantial improvements from shape and structure now.
Sealing is a necessary condition that guarantees the hydraulic system proper functioning, and poor sealing descends volumetric efficiency and pressure even can not work.Particularly pressurize is more difficult under greater than the pressure condition of 32MPa.The report of the relevant application from year December in September, 1985 to 1991 that process Patent Office of the People's Republic of China delivers, bulletin, mandate is retrieved, and is used for the sealing of rocker arm, (comprises F16J9/00, F16J15/56) does not all have this similar structure.CN2069947U gives pressure type dynamic pressure compensation reciprocating movement sealing device, and it is a system, is with dynamic pressure circle compressing seal ring, realizes sealing, and no matter principle is different fully with the utility model with structure.The reciprocal moving axis bar of CN2071276U normal pressure seal arrangement and CN2068621U can only bear normal pressure toward the double action Contact Seal ring.In relevant hydraulic transmission book, only introduced and be squeezed in the matching gap when preventing the O RunddichtringO, caused and go to pot at 32MPa.In the side of O RunddichtringO back-up ring is installed for this reason, but has been increased the surface friction drag of seal arrangement.This structure is unsuitable for rotation and spiral activity.Edit by Lei Tianjue, machinery publishing house front page in April nineteen ninety " the 1862nd page of oilhydraulic engineering handbook, the reciprocating type motive sealing of ultrahigh pressure, mainly realize by clearance seal and stuffing box packing, the non-sealed elastic cylinder bush structure of the many employings of clearance seal, the stuffing box packing structure is to adopt V-seal filler, pressurized under the effect of screw thread power, forced seal.When being used for 700-1000MPa, then adopt the self-tightening clearance seal and force the gland sealed composite mechanism, but the precision prescribed height, the manufacturability complexity, yield rate is low, and cost is very expensive.For the sealing that is less than or equal to 150MPa, both uneconomical, also unnecessary.
The purpose of this utility model is to provide a kind of ultrahigh pressure rocker arm compound motive sealing, can be on existing hydraulic element basis, change the structure and the shape of piston seal, just can under present situation about will leak less than 32MPa, improve air-proof condition to a great extent, pressure is improved, to improve volumetric efficiency and working pressure.When under identical ability to work situation, size can be changed little, or under same size situation, the increase of exerting oneself.
The purpose of this utility model is to realize like this, cylindrical at the two ends of rocker arm piston, adopt O type rubber seal, the combined labyrinth and carbon gland of overcoat teflon L RunddichtringO, produce outside tension force behind O RunddichtringO compressive deformation, press the cylindrical of L RunddichtringO and hydraulic cylinder working surface are adjacent to, L RunddichtringO inner chamber is subjected to hydraulic pressure simultaneously, also the active force of oriented external pressure makes cylindrical and working surface paste tightlyer.When adopting O type L RunddichtringO group, what fit with working surface is teflon, and its surface friction drag is little.Prolong the working life of O RunddichtringO behind the O RunddichtringO overcoat L RunddichtringO pressurized in the unlikely embedding gap, increased the lateral pressure of O RunddichtringO again to the L RunddichtringO, make L RunddichtringO cylindrical and hydraulic cylinder working surface paste tightlyer, obtain high sealing effect, also can be used for rotation, spiral motion.This structure can meet the demands to the plunger case less than 80MPa.For the oil hydraulic cylinder that is less than or equal to the 150MPa rocker arm, piston is longer, then adopts the composite structure of O type L type combined labyrinth and carbon gland and expander formula sealing.The sealing of expander formula is to make cavity at the middle part of rocker arm outside piston suitable position, and the expander circle of overcoat metal or plastics cements it or tighten up, and makes cavity and extraneous obstructed composition expander formula sealing.There is throttle valve at rocker arm piston two ends, the oil of high pressure is by throttle valve or aperture, enter and make the expander circle produce micro-deformation in the expander cavity, thereby reduce the gap between expander circle cylindrical and hydraulic jack working surface, improve sealing effect, the one-way valve that rocker arm piston two ends are provided with unloading in addition communicates with cavity., can unload by one-way valve when mobile when reverse, throttle valve and unloading one-way valve respectively have three respectively to be the five equilibrium permutation inter alternate are 60 degree, and this structure can be applicable to structures such as single pole, through-rod piston, oil cylinder cover, also is applicable to plunger cylinder.The utility model is widely used in the motive sealing of cylinder, pump, valve element, equipment of hydraulic pressure, the Pneumatic Transmission rocker arm of industries such as machinery, chemical industry, automobile, hoist, engineering machinery, plastics machinery, metallurgy etc.
The utility model is compared with existing reciprocating type motive sealing, has to improve sealing, pressure stability, safe, easily manufactured, long service life, original size that can not change and can improve and exert oneself or exert oneself equal, and size such as can dwindle at characteristics.
Concrete structure of the present utility model is provided by following exemplifying embodiment and accompanying drawing thereof.
Fig. 1 comprises following part in addition according to the structural representation that the utility model proposes:
1, hydraulic cylinder 2, L RunddichtringO 3, O RunddichtringO 4, throttle valve 5, rocker arm piston 6, one-way valve 7, expander circle 8, cavity
Describe the utility model embodiment in detail below in conjunction with accompanying drawing:
Concrete working condition is as follows: O RunddichtringO (3) when static, because the stress of installing that gives has outside tension force to make the working surface driving fit of the cylindrical and the hydraulic cylinder (1) of L RunddichtringO (2), expander circle this moment (7) is indeformable, maintains certain clearance between the working surface of expander circle (7) cylindrical and hydraulic cylinder (1).Because the teflon friction factor is little, so starting is sensitive.Less than dynamic under the 80MPa pressure time, the left side pressure of rocker arm piston (5) raises, flatten after O RunddichtringO (3) is stressed on the one hand, produce big outside tension force and press to L RunddichtringO (2), make the cylindrical of L RunddichtringO (2) and hydraulic cylinder (1) working surface dwindle the gap; L RunddichtringO (2) is subjected under the effect of high pressure oil on the other hand, and its oral area also will outwards be out of shape, and the cylindrical of L RunddichtringO (2) and the gap between hydraulic cylinder (1) working surface is dwindled, thereby increased sealing.When oil pressure continues to increase to when being less than or equal to 150MPa, press overcoat L RunddichtringO (2) except O RunddichtringO (3) and increase distortion, further reduce outside the cylindrical and the gap between hydraulic cylinder (1) working surface of L RunddichtringO (2), while left end high pressure oil, enter cavity (8) by throttle valve (4), make expander circle (7) distortion, and the cavity of right-hand member (8) is in the reduction of oil return unloading situation downforce, high pressure oil in the cavity (8) flows out cavity (8) through one-way valve (6), enter in the right-hand member cylinder, form unloading by drainback passage.Because low L RunddichtringO (2) distortion of right-hand member low pressure (LP) cylinder pressure reduces, thereby the gap between L RunddichtringO (2) cylindrical and oil hydraulic cylinder (1) working surface increases.The oil of rocker arm piston (5) middle part oil film because of the expander circle (7) of left end is under the big situation that rises, can be pushed the oil of the oil film of right-hand member in the right-hand member cylinder to, and this moment is because left end under the high pressure oil effect, can fully keep high sealing.When inverted running, the step-down of left end cylinder, the supercharging of right-hand member cylinder, principle is identical with forward with effect.Owing to adopted compound sealing structure, so can obtain reliable sealing.Throttle valve (4) and one-way valve (6) are five equilibrium separately to be arranged, and is 60 degree between mutually, so oil-feed, unloading can both balanced actions, so pressure stability.
Claims (3)
1, the compound motive sealing of ultrahigh pressure rocker arm is a kind of field that relates to the motive sealing of hydraulic transmission rocker arm, its feature: be that this structure is the cylindrical O RunddichtringO (3) in rocker arm piston (5) end, the combined labyrinth and carbon gland of overcoat L RunddichtringO (2), make cavity (8) with suitable position in the middle part of rocker arm piston (5) cylindrical, the expander formula sealing of overcoat expander circle (7), the composite structure of two kinds of sealing means of composition.
2, structure according to claim 1, its feature: be that rocker arm piston (5) end is communicated with cavity (8) by throttle valve (4).
3, structure according to claim 1 is characterized in that: rocker arm piston (5) end is communicated with cavity (8) by one-way valve (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92220348 CN2179492Y (en) | 1992-09-24 | 1992-09-24 | Compound dynamic seal of superhigh pressure reciprocating rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92220348 CN2179492Y (en) | 1992-09-24 | 1992-09-24 | Compound dynamic seal of superhigh pressure reciprocating rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2179492Y true CN2179492Y (en) | 1994-10-12 |
Family
ID=33767397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92220348 Expired - Fee Related CN2179492Y (en) | 1992-09-24 | 1992-09-24 | Compound dynamic seal of superhigh pressure reciprocating rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2179492Y (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102588611A (en) * | 2012-01-29 | 2012-07-18 | 天津重型装备工程研究有限公司 | Hydraulic cylinder device with sealing gap adjusting structure |
| CN102588610A (en) * | 2012-01-29 | 2012-07-18 | 天津重型装备工程研究有限公司 | Hydraulic cylinder with sealing follow-up device |
| CN101809342B (en) * | 2007-09-28 | 2013-02-13 | 通用电气健康护理生物科学股份公司 | Sealing assembly for a chromatography column |
| CN104145145A (en) * | 2012-03-15 | 2014-11-12 | 博格华纳公司 | One-way pressure activated piston seal |
| CN106369165A (en) * | 2015-07-23 | 2017-02-01 | 杉野机械股份有限公司 | Ultrahigh-pressure sealing device and reciprocating pump |
| CN109281890A (en) * | 2018-11-09 | 2019-01-29 | 湖南师范大学 | A kind of hydraulic cylinder combined sealing structure and hydraulic cylinder |
| CN109323004A (en) * | 2018-11-21 | 2019-02-12 | 中国航发西安动力控制科技有限公司 | A kind of reduction clearance leakage structure with transitional pressure chamber |
| CN110671560A (en) * | 2019-10-10 | 2020-01-10 | 太原科技大学 | Automatic quick ultrahigh-pressure pipeline joint |
| CN111561487A (en) * | 2020-06-17 | 2020-08-21 | 朱金和 | Sequence valve sealing structure and model selection for engineering machinery |
-
1992
- 1992-09-24 CN CN 92220348 patent/CN2179492Y/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101809342B (en) * | 2007-09-28 | 2013-02-13 | 通用电气健康护理生物科学股份公司 | Sealing assembly for a chromatography column |
| CN102588611A (en) * | 2012-01-29 | 2012-07-18 | 天津重型装备工程研究有限公司 | Hydraulic cylinder device with sealing gap adjusting structure |
| CN102588610A (en) * | 2012-01-29 | 2012-07-18 | 天津重型装备工程研究有限公司 | Hydraulic cylinder with sealing follow-up device |
| CN102588611B (en) * | 2012-01-29 | 2015-01-07 | 天津重型装备工程研究有限公司 | Hydraulic cylinder device with sealing gap adjusting structure |
| CN102588610B (en) * | 2012-01-29 | 2015-01-07 | 天津重型装备工程研究有限公司 | Hydraulic cylinder with sealing follow-up device |
| CN104145145A (en) * | 2012-03-15 | 2014-11-12 | 博格华纳公司 | One-way pressure activated piston seal |
| CN104145145B (en) * | 2012-03-15 | 2017-12-01 | 博格华纳公司 | The piston seal of uniaxial pressure activation |
| CN106369165A (en) * | 2015-07-23 | 2017-02-01 | 杉野机械股份有限公司 | Ultrahigh-pressure sealing device and reciprocating pump |
| CN109281890A (en) * | 2018-11-09 | 2019-01-29 | 湖南师范大学 | A kind of hydraulic cylinder combined sealing structure and hydraulic cylinder |
| CN109323004A (en) * | 2018-11-21 | 2019-02-12 | 中国航发西安动力控制科技有限公司 | A kind of reduction clearance leakage structure with transitional pressure chamber |
| CN110671560A (en) * | 2019-10-10 | 2020-01-10 | 太原科技大学 | Automatic quick ultrahigh-pressure pipeline joint |
| CN111561487A (en) * | 2020-06-17 | 2020-08-21 | 朱金和 | Sequence valve sealing structure and model selection for engineering machinery |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
| RN01 | Renewal of patent term | ||
| C53 | Correction of patent of invention or patent application | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: PATENTEE ADDRESS; FROM: NO. 6, QINGLONG LANE, YIBIN CITY, SICHUAN PROVINCE TO: XINXINGRANJURANLIAOMEN CITY, LIUCHENG STREET, YIBIN CITY, SICHUAN PROVINCE |
|
| CP03 | Change of name, title or address |
Address after: Sichuan Yibin Liu Cheng Jie new fuel gas appliance stores Patentee after: Yu Yiqin Patentee after: Shen Haonan Address before: No. 6 Qinglong lane, Sichuan, Yibin Patentee before: Yu Yiqin Patentee before: Shen Haonan |
|
| C57 | Notification of unclear or unknown address | ||
| DD01 | Delivery of document by public notice |
Addressee: Yu Yiqin Document name: payment instructions |
|
| C57 | Notification of unclear or unknown address | ||
| DD01 | Delivery of document by public notice |
Addressee: Yu Yiqin Document name: Notice of termination |
|
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |