CN206770314U - A kind of low friction static pressure oil film guide hydraulic cylinder - Google Patents
A kind of low friction static pressure oil film guide hydraulic cylinder Download PDFInfo
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- CN206770314U CN206770314U CN201720407533.0U CN201720407533U CN206770314U CN 206770314 U CN206770314 U CN 206770314U CN 201720407533 U CN201720407533 U CN 201720407533U CN 206770314 U CN206770314 U CN 206770314U
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- piston
- hydraulic cylinder
- oil
- cylinder
- guide sleeve
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Abstract
The utility model is a kind of low friction static pressure oil film guide hydraulic cylinder, including along poppet piston, I-shaped oil groove guide sleeve, piston rod, cylinder body, upper and lower cylinder cap.The utility model is used along wimble structure piston, using the guide sleeve for offering I-shaped oil groove at piston rod and hydraulic cylinder upper cylinder cover in the contact position of piston and the hydraulic pressure inside wall of cylinder respectively.Two kinds of structures are combined, and are sealed using liquid static-pressure support, are greatly reduced friction, improve the kinetic stability and dynamic response of moving component, reliability is high, long lifespan, is advantageous to the correction of piston, simple in construction, is easy to dismount.
Description
Technical field
The utility model belongs to machine driving professional domain.By the structure shape for changing optimization hydraulic cylinder piston and guide sleeve
Formula, reduce hydraulic cylinder because potted component and caused by rub, improve the kinetic stability and dynamic response of hydraulic cylinder, prolong
The working life of hydraulic cylinder has been grown, has been adapted to hydraulic cylinder technical field.
Background technology
The piston of existing hydraulic cylinder and cylinder body contact area are larger, cause larger friction between the two be present, compared with
Big contact area is also unfavorable for radiating, and have impact on hydraulic cylinder dynamic property and the stability of work.Meanwhile to prevent hydraulic oil
Leakage, more between the guide sleeve and piston rod of hydraulic cylinder to be sealed using seal, this sealing structure causes piston rod movement
When frictional resistance increase, cause the dynamic property of hydraulic cylinder to reduce so that its working life greatly shortens.Common static pressure branch
Hold hydraulic cylinder and generally use rectangle oil recess structure, this structural-load-carrying capacity is small, easy to wear, and the pressure of single oil pocket is excessively
Concentrate, be unfavorable for the correction of hydraulic cylinder piston rod and piston.
Under this background, hydrostatic support hydraulic cylinder can complete transmission presented above well and require, become
The important research direction of modern mechanical transmission.For the deficiency of existing hydrostatic support hydraulic pressure cylinder technology, frictional force is big, working life
It is short, the problem of dynamic property and low job stability.Design, structure improvement from piston and guide sleeve etc. are started with, to liquid
Piston used in cylinder pressure and guide sleeve have been carried out compared with system and in-depth study.
The content of the invention
The purpose of this utility model be in order to overcome weak point existing for above-mentioned existing hydrostatic support hydraulic pressure cylinder technology, and
A kind of low friction static pressure oil film guide hydraulic cylinder is devised, it has, and frictional force is small, wears small, dynamic property and job stability
Height, long working life is simple in construction beneficial to the correction of piston, easy-disassembling-assembling feature.
The utility model is a kind of low friction static pressure oil film guide hydraulic cylinder, including in piston and the hydraulic pressure inside wall of cylinder
Contact position is used along wimble structure piston, and the piston is a kind of suitable wimble structure（Taper of the piston both ends design less than 1 °）Work
Plug, using hydrostatic bearing principle, the gap between piston and hydraulic cylinder inwall produces oil film, piston floated, effectively
Reduce the friction between piston and inboard wall of cylinder block.Used at piston rod and hydraulic cylinder upper cylinder cover and offer I-shaped oil groove
Guide sleeve.Four I-shaped oil grooves are uniformly offered on the inwall of described guide sleeve, wherein, axially disposed is referred to as axle
To oil groove, axially disposed is referred to as axial oil groove.Each I-shaped oil groove centre position offers oil inlet, in I-shaped oil
The side of groove offers annular oil unloading trough, and oil leak hole is offered in annular emptying trench bottom.
Piston uses clearance seal with inboard wall of cylinder block；Gap between piston rod and guide sleeve is 15-30 μm；Piston rod with
Upper cylinder cover is sealed using sealing ring.
Beneficial effect：It has that frictional force is small, abrasion is small, and dynamic property and job stability are high, long working life, are beneficial to
The correction of piston, simple in construction, easy-disassembling-assembling feature.
Brief description of the drawings
For ease of explanation, the utility model is described in detail by following specific implementations and accompanying drawing.
Fig. 1 is the schematic diagram of low friction static pressure oil film guide hydraulic cylinder.
Fig. 2 is the sectional view along poppet piston.
Fig. 3 is the structural representation of guide sleeve.
Fig. 4 is the schematic diagram of guide sleeve inwall expansion.
Fig. 5 is the schematic diagram of hydrostatic support guide sleeve oil supply system operation principle.
Embodiment
To make the purpose of this utility model, technical scheme and advantage of greater clarity, below by what is shown in accompanying drawing
Specific embodiment describes the utility model.However, it should be understood that these descriptions are merely illustrative, and it is not intended to limit this reality
With new scope.In addition, in the following description, the description to known features and technology is eliminated, to avoid unnecessarily mixing
Confuse concept of the present utility model.
Structure composition of the present utility model is as shown in Figure 1, Figure 2, Figure 3, Figure 4.The utility model is a kind of low friction static pressure
Oil film guiding hydraulic cylinder, used including in the contact position of piston and the hydraulic pressure inside wall of cylinder along wimble structure piston, the piston（5）
It is a kind of suitable wimble structure（Taper of the piston both ends design less than 1 °）Piston, using hydrostatic bearing principle, in piston and hydraulic pressure
Gap between inboard wall of cylinder block produces oil film, and piston is floated, effectively reduces the friction between piston and inboard wall of cylinder block.
Piston rod offers the guide sleeve of I-shaped oil groove with being used at hydraulic cylinder upper cylinder cover.Described guide sleeve（7）Inwall on
It is even to offer four I-shaped oil grooves（10）, wherein, axially disposed is referred to as axial oil groove, and axially disposed is referred to as axle
To oil groove.Each I-shaped oil groove centre position offers oil inlet（12）, offer annular in the side of I-shaped oil groove and unload
Oil groove（9）, oil leak hole is offered in annular emptying trench bottom（11）.
Operation principle of the present utility model is as follows, before system work, overflow valve（4）In unloading condition, motor（2）
After startup, hydraulic pump（3）Start fuel feeding, after the charge oil pressure of hydraulic pump is stable, the pressure for setting up overflow valve slightly above works
Pressure, hydraulic oil is through check valve（5）, oil filter（6）, smart oil filter（7）, variable throttle valve（9）, choke valve（12）Start to quiet
Pumping cavity fuel feeding, after static pressure chamber reaches certain pressure, piston rod is floated, oil leak hole backflow of the hydraulic oil through guide sleeve side
To fuel tank（1）Working cycles are completed, now starts hydraulic cylinder and starts working.
The advantages of general principle and principal character of the present utility model and the utility model has been shown and described above.One's own profession
For the technical staff of industry it should be appreciated that the utility model is not considered as being limited by the foregoing description, described in description above is explanation
Principle of the present utility model, on the premise of the spirit and scope of the utility model is not departed from, the utility model also has various changes
Change and improve, these changes and improvements are both fallen within claimed the scope of the utility model.The requires of the utility model protects model
Enclose by appended claims and its equivalent thereof.
Claims (1)
1. a kind of low friction static pressure oil film guide hydraulic cylinder, it is characterised in that including piston（5）, guide sleeve（7）, the piston
（5）A kind of suitable wimble structure, i.e., the design of piston both ends less than 1 ° of taper piston, using hydrostatic bearing principle, piston with
Gap between hydraulic cylinder inwall produces oil film, and piston is floated, effectively reduces rubbing between piston and inboard wall of cylinder block
Wipe；Described guide sleeve（7）Inwall on uniformly offer four I-shaped oil grooves（10）, respectively axial oil groove and axial direction
Oil groove, each I-shaped oil groove centre position offer oil inlet（12）, annular emptying is offered in the side of I-shaped oil groove
Groove（9）, oil leak hole is offered in annular emptying trench bottom（11）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720407533.0U CN206770314U (en) | 2017-04-18 | 2017-04-18 | A kind of low friction static pressure oil film guide hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720407533.0U CN206770314U (en) | 2017-04-18 | 2017-04-18 | A kind of low friction static pressure oil film guide hydraulic cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206770314U true CN206770314U (en) | 2017-12-19 |
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ID=60630522
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720407533.0U Expired - Fee Related CN206770314U (en) | 2017-04-18 | 2017-04-18 | A kind of low friction static pressure oil film guide hydraulic cylinder |
Country Status (1)
| Country | Link |
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| CN (1) | CN206770314U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107013528A (en) * | 2017-05-03 | 2017-08-04 | 哈尔滨理工大学 | A kind of low friction static pressure oil film guide hydraulic cylinder |
| CN115898827A (en) * | 2022-11-24 | 2023-04-04 | 上海羿弓氢能科技有限公司 | Novel high-frequency action decompression cylinder for diaphragm compressor |
-
2017
- 2017-04-18 CN CN201720407533.0U patent/CN206770314U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107013528A (en) * | 2017-05-03 | 2017-08-04 | 哈尔滨理工大学 | A kind of low friction static pressure oil film guide hydraulic cylinder |
| CN115898827A (en) * | 2022-11-24 | 2023-04-04 | 上海羿弓氢能科技有限公司 | Novel high-frequency action decompression cylinder for diaphragm compressor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171219 Termination date: 20180418 |