CN203962548U - A kind of hydraulic jack double seal assembly - Google Patents
A kind of hydraulic jack double seal assembly Download PDFInfo
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- CN203962548U CN203962548U CN201420172459.5U CN201420172459U CN203962548U CN 203962548 U CN203962548 U CN 203962548U CN 201420172459 U CN201420172459 U CN 201420172459U CN 203962548 U CN203962548 U CN 203962548U
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- cylinder
- seal assembly
- ring
- end seal
- sealing
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Abstract
The utility model discloses a kind of hydraulic jack double seal assembly, comprise cylinder bottom black box and cylinder end seal assembly, described cylinder bottom black box is installed on the piston place of cylinder bottom, and described cylinder end seal assembly is installed on the guide sleeve place of cylinder head position piston rod.Described cylinder bottom black box comprises X shape ring and V-seal device, and described cylinder end seal assembly comprises dust ring and cylinder end seal ring, and described cylinder end seal ring comprises O type circle and D type oil sealing, between O type circle and D type oil sealing, back-up ring is set.The utility model improves traditional single envelope type hydraulic jack, not only sealing range is extended to cylinder head and cylinder bottom, and each black box has adopted multi-sealed technique, by a small amount of cost, drop into, effectively avoided the oil cylinder loss from spoilage that does not pass a test caused by poorly sealed lattice or material, greatly improved the durability of Sealing and the life cycle of oil cylinder, played and saved efficient object.
Description
Technical field
The utility model relates to hydraulic jack black box technical field, relates in particular to a kind of hydraulic jack double seal assembly.
Background technique
The applied principle of oil hydraulic cylinder, is increase or the minimizing by fluid pressure, realizes the straight line motion of driving mechanism, so be also referred to as linear actuator, especially hydraulic jack, has generally been applied in a plurality of fields such as industrial machinery or load transportation.
The most conventional piston-type hydro compressing cylinder of take is example, and its major part has cylinder bottom, cylinder head, cylinder letter, piston, piston rod, guide sleeve, Sealing and pull bar.Traditional hydraulic jack Sealing is often single envelope type, and its compensation ability is poor, and because import oil sealing material cost is higher, and domestic material quality is not good enough, so had a strong impact on the normal service life of hydraulic jack.
Application number is the double-sealing device that the patent of invention of 201110396909. X discloses a kind of oil cylinder, comprise: cylinder head, seal arrangement, described cylinder head place is provided with seal arrangement, described seal arrangement comprises between first sealing, oil storage tank, between second sealing, described oil storage tank is arranged between described first sealing and between between described second sealing, in the middle of between two seals, add one oil storage tank, reduce the dry friction of second sealing, reduce the loss of product, improved job schedule, and simple in structure, but its deficiency is: its seal en-hancement only only limits to cylinder head place, the sealing effect at piston place, cylinder bottom position is not improved, and be unfavorable for the seal protection of high pressure oil jacking stage to piston.
Model utility content
The purpose of this utility model is to provide a kind of hydraulic jack double seal assembly, adopts polytype Sealing, and the sealing technology of cylinder bottom and cylinder head is carried out to dual improvement, has effectively improved the whole service life of hydraulic jack, and has reduced oil cylinder cost.
The technological scheme that adopted is for achieving the above object: a kind of hydraulic jack double seal assembly, comprise cylinder bottom black box and cylinder end seal assembly, described cylinder bottom black box is installed on the piston place of cylinder bottom, and described cylinder end seal assembly is installed on the guide sleeve place of cylinder head position piston rod.
Described cylinder bottom black box comprises X shape ring and V-seal device.
Described V-seal device comprises a pair of support ring and the V-type circle between two support rings.
Described cylinder end seal assembly comprises dust ring and cylinder end seal ring.
Described cylinder end seal ring comprises O type circle and D type oil sealing, between O type circle and D type oil sealing, back-up ring is set.
Front buffer plunger and rear buffer plunger are set on described piston.
The utility model improves traditional single envelope type hydraulic jack, not only sealing range is extended to cylinder head and cylinder bottom, and each black box has adopted multi-sealed technique, by a small amount of cost, drop into, effectively avoided the oil cylinder loss from spoilage that does not pass a test caused by poorly sealed lattice or material, greatly improved the durability of Sealing and the life cycle of oil cylinder, played and saved efficient object.
Accompanying drawing explanation
Fig. 1 is sectional structure chart of the present utility model.
Fig. 2 is the local enlarged diagram of A in Fig. 1.
Fig. 3 is the local enlarged diagram of B in Fig. 1.
Embodiment
As shown in Figure 1, a kind of hydraulic jack double seal assembly, comprises cylinder bottom black box and cylinder end seal assembly, and described cylinder bottom black box is installed on piston 2 places of cylinder bottom 1, and described cylinder end seal assembly is installed on guide sleeve 5 places of cylinder head 3 position piston rods 4.
Described cylinder bottom black box comprises X shape ring 6 and V-seal device.
Described V-seal device comprises a pair of support ring 7 and the V-type circle 8 between two support rings.
Described cylinder end seal assembly comprises dust ring 9 and cylinder end seal ring.
Described cylinder end seal ring comprises O type circle 10 and D type oil sealing 11, between O type circle and D type oil sealing, back-up ring 12 is set.
Front buffer plunger 13 and rear buffer plunger 14 are set on described piston 2, because in actual use, oil hydraulic cylinder often drives the mechanism with certain mass, when hydraulic cylinder is during to stroke end, still has larger kinetic energy, as do not done, slow down and process, to there is mechanical collision in hydraulic cylinder piston and cylinder cap, produce and impact and noise, and have destructiveness, so the front and back buffer plunger in the utility model, has just played the effect that relaxes or prevent this harm generation.
Cylinder end seal assembly is installed on the guide sleeve place of cylinder head position piston rod, this position sealing of tradition only relies on an O type circle, often because oil sealing material does not pass a test or compensation ability is poor, affect life cycle or the durability of oil cylinder, general O type circle is all to make with the nitrile butadiene rubber of various grades and hardness, and for example a kind of typical versatile material is exactly low/middle nitrile butadiene rubber that hardness is approximately 75 degree.O type circle in the utility model can adopt fluorine rubber or poly-fluorine fat rubber, and the former heat resistance and oil resistance are better, and latter is more suitable for wear-resisting withstand voltage occasion, thereby accomplishes that material selects to adapt with oil cylinder Environmental Conditions.
The utility model has increased a D type oil sealing on the basis of original O type circle, and it is the O type circle with square base in essence, and its frictional force is suitable with O type circle, but compare O type circle, larger base portion area of contact can be provided, thereby be difficult for being distorted, eliminate the possibility of deformation failure.Between O type circle and D type oil sealing, back-up ring being set, is in order to make D type oil sealing more be adapted to hyperbaric environment, to prevent that cross section deformation is under high pressure excessive, so, being used in conjunction with of D type oil sealing and O type circle, makes reciprocating movement sealing (for example hydraulic piston rod seal) more thorough, and beneficial effect is higher.
The dust ring arranging in cylinder end seal assembly, polyurethane product for lip type structure, friction factor is lower, can prevent that the dirts such as dust accompanying on cylinder outer surface, sand-lime, rainwater and frost from entering sealing mechanism inside, also can reduce the wear intensity of cylinder head position equipment simultaneously.
Cylinder bottom black box is installed on the piston place of cylinder bottom, what in the design, adopt is the combination of X shape ring and V-seal device, X-shaped sealing ring is similar to O RunddichtringO using and use, but, it has more effective sealability than O RunddichtringO, this is a kind of double-action seal ring by the pressure medium application of force, relies on its contact stress on sealing coupled face to seal, and the radial and axial power of seal ring depends on system works pressure.When pressure raises, the corresponding increase of the decrement of seal ring, contact stress also increases thereupon.Therefore, X-shaped sealing ring is compared with O type circle, has the following advantages: during to-and-fro motion, can not overturn, distortion; Required radial precompressed amount is little, and contact stress is little; Between protruding part, when work, be full of lubricant oil, friction factor is little; Distribution of contact is even, leaks little.So application X type circle, in motive sealing occasion, have good sealing effect, and the life-span is long, more effective than O type circle in the occasion of low-speed motion, sealing effect is also particularly evident.
Why V-seal device is applied in cylinder bottom piston place, is because its pressure-bearing is effective, and when pressure medium raises, contact stress also can correspondingly raise, more easily sealing.In device, V-type circle two ends are furnished with a pair of support ring, play the effect of supporting and compressing, because its section is thick and solid, size is accurate, can make seal ring lay on the one hand stable, to V-shaped seal ring, cause an initial compression amount on the other hand, it is fully contacted with sealed.Under free state, after V type circle assembling, just there is certain distortion, but due to the effect of support ring, it is most advanced and sophisticated that this distortion only occurs in the lip of V-type circle, and produce pressure in its contact position, even if do not apply impacting force, lip also can seal certain interior pressure.This " self-styled " exactly because of lip effect, when medium working pressure raises, procheilon changes contact shape and adds large contacting stress, lip and sealed fit will be tightr, to realize seal action.
The above, it is only preferred embodiment of the present utility model, not the utility model is done to any pro forma restriction, any simple modification, equivalent variations and modification that every foundation technical spirit of the present utility model is done above embodiment, all still belong in the scope of technical solutions of the utility model.
Claims (1)
1. a hydraulic jack double seal assembly, it is characterized in that: comprise cylinder bottom black box and cylinder end seal assembly, described cylinder bottom black box is installed on the piston place of cylinder bottom, described cylinder end seal assembly is installed on the guide sleeve place of cylinder head position piston rod, described cylinder bottom black box comprises X shape ring and V-seal device, described cylinder end seal assembly comprises dust ring and cylinder end seal ring, and described cylinder end seal ring comprises O type circle and D type oil sealing, between O type circle and D type oil sealing, back-up ring is set.
2. hydraulic jack double seal assembly as claimed in claim 1, is characterized in that: described V-seal device comprises a pair of support ring and the V-type circle between two support rings.
3. hydraulic jack double seal assembly as claimed in claim 1, is characterized in that: front buffer plunger and rear buffer plunger are set on described piston.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420172459.5U CN203962548U (en) | 2014-04-11 | 2014-04-11 | A kind of hydraulic jack double seal assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420172459.5U CN203962548U (en) | 2014-04-11 | 2014-04-11 | A kind of hydraulic jack double seal assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203962548U true CN203962548U (en) | 2014-11-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420172459.5U Expired - Fee Related CN203962548U (en) | 2014-04-11 | 2014-04-11 | A kind of hydraulic jack double seal assembly |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104525300A (en) * | 2014-12-31 | 2015-04-22 | 浙江浙矿重工股份有限公司 | Hydraulic lifting mechanism of cone crusher |
-
2014
- 2014-04-11 CN CN201420172459.5U patent/CN203962548U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104525300A (en) * | 2014-12-31 | 2015-04-22 | 浙江浙矿重工股份有限公司 | Hydraulic lifting mechanism of cone crusher |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141126 Termination date: 20160411 |
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| CF01 | Termination of patent right due to non-payment of annual fee |