CN208719050U - A kind of anti-eccentric load hydrostatic bearing sealing hydraulic cylinder - Google Patents
A kind of anti-eccentric load hydrostatic bearing sealing hydraulic cylinder Download PDFInfo
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- CN208719050U CN208719050U CN201820388797.0U CN201820388797U CN208719050U CN 208719050 U CN208719050 U CN 208719050U CN 201820388797 U CN201820388797 U CN 201820388797U CN 208719050 U CN208719050 U CN 208719050U
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- 238000007789 sealing Methods 0.000 title claims abstract description 35
- 230000002706 hydrostatic effect Effects 0.000 title claims abstract description 30
- 230000003068 static effect Effects 0.000 claims description 32
- 239000003921 oil Substances 0.000 abstract description 73
- 239000010720 hydraulic oil Substances 0.000 abstract description 8
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 230000004043 responsiveness Effects 0.000 abstract 1
- 239000000446 fuel Substances 0.000 description 19
- 238000010586 diagram Methods 0.000 description 7
- 239000012530 fluid Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000002828 fuel tank Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000010727 cylinder oil Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Abstract
本实用新型是一种抗偏载的静压支承密封液压缸，其中包括静压活塞，静压导向套，静压连接体，活塞杆，上下缸体，上下缸盖，密封圈；本实用新型分别在活塞与液压缸筒内壁、活塞杆与导向套处依据液体静压支承密封原理，利用活塞与液压缸筒内壁、活塞杆与导向套之间的间隙产生静压支承油膜，使活塞或活塞杆“悬浮”在液压油中；合理的间隙能够有效的防止液压油的泄漏，本实用新型极大的减小了传统液压缸采用密封圈密封而产生的摩擦力，有利于液压缸抵抗侧向负载，有利于活塞的纠偏，可以提高液压缸的振动频率和定位精度，提高运动部件的运动稳定性和动态响应性。
The utility model relates to a hydrostatic support sealing hydraulic cylinder against partial load, which comprises a hydrostatic piston, a hydrostatic guide sleeve, a hydrostatic connecting body, a piston rod, an upper and lower cylinder block, an upper and lower cylinder cover and a sealing ring; the utility model According to the principle of hydrostatic bearing sealing at the piston and the inner wall of the hydraulic cylinder, the piston rod and the guide sleeve, the gap between the piston and the inner wall of the hydraulic cylinder, the piston rod and the guide sleeve is used to generate a hydrostatic bearing oil film, so that the piston or piston The rod is "suspended" in the hydraulic oil; the reasonable clearance can effectively prevent the leakage of the hydraulic oil, the utility model greatly reduces the friction force generated by the sealing of the traditional hydraulic cylinder with the sealing ring, which is beneficial for the hydraulic cylinder to resist the lateral The load is conducive to the correction of the piston, which can improve the vibration frequency and positioning accuracy of the hydraulic cylinder, and improve the motion stability and dynamic responsiveness of the moving parts.
Description
Technical field
The utility model belongs to hydraulic drive professional domain.By the structure of optimization design hydraulic cylinder piston and guide sleeve,
Using hydrostatic support sealing principle, it is greatly reduced the frictional force that hydraulic cylinder is sealed using sealing ring and generated, is conducive to liquid
Cylinder pressure resists side loading, and the vibration frequency and positioning accuracy of hydraulic cylinder can be improved, extend the working life of hydraulic cylinder, fits
It should be in hydraulic cylinder technical field.
Background technique
Executive component and dynamical element of the hydraulic cylinder as hydraulic system, the quality of performance directly affect the control of system
Precision and response speed.Compared with Normal hydraulic cylinder, hydraulic cylinder requires have lesser frictional force and excellent anti-side loading
Ability, to meet the heavy duty and unbalance loading requirement under high frequency.In general, mostly used between the piston rod and piston of hydraulic cylinder sealing element into
Row sealing, this sealing structure increase frictional resistance when piston motion, cause the dynamic property of hydraulic cylinder to reduce, even
The working life of hydraulic cylinder can be greatly shortened.Meanwhile when cylinder design, usually only consider that it bears axial force, and passes through two
Hinged mode is held to balance radial force, but in actual condition, hydraulic cylinder can bear certain lateral unbalance loading.Lateral unbalance loading meeting
Increase frictional force at hydraulic cylinder sealing, influence response speed and control precision, causes low speed jerking motion, leakage even seal failure
The problems such as.
Under this background, hydrostatic bearing principle and clearance seal principle are used for reference, hydrostatic support sealing principle is utilized
Hydraulic cylinder can complete seal request presented above well, become the important research direction of Modern hydraulic transmission.For
The deficiency of existing hydraulic cylinder technology, frictional force is big, and working life is short, dynamic property and the low problem of job stability.From piston
Design, structure optimization with guide sleeve etc. are started with, and piston used in hydraulic cylinder and guide sleeve have been carried out compared with system and goed deep into
Research.
Summary of the invention
The purpose of this utility model is to overcome shortcomings existing for above-mentioned existing hydraulic cylinder technology, and devise one
The hydrostatic support sealing fluid cylinder pressure of kind of anti-bias load, it is greatly reduced that conventional cylinder is sealed using sealing ring and what is generated rub
Power is wiped, is conducive to hydraulic cylinder and resists side loading, be conducive to the correction of piston, the vibration frequency and positioning of hydraulic cylinder can be improved
Precision improves the kinetic stability and dynamic response of moving component.
The utility model is a kind of hydrostatic support sealing fluid cylinder pressure of anti-bias load, it is characterised in that including static pressure piston (5),
Static pressure guide sleeve (10), static pressure connector (3), piston rod (7), upper lower cylinder body, upper and lower cylinder cap, sealing ring (11)；Described is quiet
Pressure piston (5) be connected through a screw thread with piston rod (7), the upper lower cylinder body by static pressure connector (3) use screw thread or
The mode of welding is attached, and is sealed between upper and lower cylinder cap and hydraulic cylinder body using sealing ring (11), by bolt into
Row connection；The piston oil pocket (17) of four rectangles is uniformly provided on static pressure piston (5) outer surface, in each rectangle oil pocket
Middle position offers fuel feed hole, and offers two annular piston oil unloading troughs (16) at the both ends of rectangle oil pocket, in every ring
Shape emptying trench bottom offers piston oil leak hole (18)；The piston rod (7) uses stepped shaft structure, at the center of path shaft end
Piston rod fuel feed hole (24) are offered, piston rod oil outlet (23) are offered below fuel feed hole, and guarantee fuel feed hole and fuel-displaced
Hole centric angle is 45 °；Four equally distributed through-holes and piston are being opened up with static pressure piston (5) rectangle oil pocket opposite position
Fuel feed hole on bar communicates；Through-hole and piston rod oil outlet (23) are opened up in the position with static pressure piston annular oil unloading trough relativity
It communicates, and is penetrated through between through-hole；Four I-shaped guiding are uniformly provided on the inner wall of the static pressure guide sleeve (10)
It covers oil pocket (13), each I-shaped oil pocket middle position offers guide sleeve fuel feed hole (8), opens up at the both ends of I-shaped oil pocket
There is annular guide sleeve oil unloading trough (14), offers guide sleeve in every annular emptying trench bottom and unload oilhole (12)；The static pressure connects
Junctor (3) plays the role of guiding to piston rod (7) for connecting lower cylinder body, to avoid leaking, in connector inner wall
On be uniformly provided with the connector oil pocket (20) of four rectangles, offer connector fuel feed hole in each rectangle oil pocket middle position
(4), two circular connector oil unloading troughs (22) and at the both ends of rectangle oil pocket are offered, are opened up in every annular emptying trench bottom
There are connector oil outlet (21).
Gap between piston and inboard wall of cylinder block, piston rod and guide sleeve is 15-30 μm.
The utility model has the advantages that the utility model is greatly reduced the frictional force that conventional cylinder is sealed using sealing ring and generated, have
Side loading is resisted conducive to hydraulic cylinder, is conducive to the correction of piston, the vibration frequency and positioning accuracy of hydraulic cylinder can be improved, mention
The kinetic stability and dynamic response of high moving component.
Detailed description of the invention
The present invention is described in detail by the following detailed description and drawings for ease of explanation,.
Fig. 1 is the structural schematic diagram of hydraulic cylinder.In figure: 1 lower cylinder cap, 2 lower cylinder bodies, 3 static pressure connectors, 4 connector oil inlets
Hole, 5 static pressure pistons, 6 upper cylinder bodies, 7 piston rods, 8 guide sleeve fuel feed holes, 9 upper cylinder covers, 10 static pressure guide sleeves, 11 sealing rings, 12 lead
Oilhole, 13 guide sleeve oil pockets, 14 guide sleeve oil unloading troughs, 15 hydraulic cylinder fuel feed holes, 16 piston oil unloading troughs, 17 piston oils are unloaded to set
Chamber, 18 piston oil leak holes, 19 hydraulic cylinder oil outlets, 20 connector oil pockets, 21 connector oil outlets, 22 connector oil unloading troughs, 23
Piston rod oil outlet, 24 piston rod fuel feed holes.
Fig. 2 is the structural schematic diagram of static pressure piston.
Fig. 3 is the structural schematic diagram of static pressure guide sleeve.
Fig. 4 is the schematic diagram of guide sleeve inner wall expansion.In figure: 1, circumferential oil sealing, 2, hydrostatic support oil pocket, 3, oil inlet,
4, oil unloading trough, 5, unload oilhole.
Fig. 5 is piston rod partial sectional view.
Fig. 6 is the structural schematic diagram of static pressure connector.
Fig. 7 is the schematic diagram of hydrostatic support oil supply system working principle.In figure: 1 fuel tank, 2 motor, 3 hydraulic pumps, 4 overflow
Flow valve, 5 check valves, 6 oil filters, 7 smart oil filters, 8 accumulators, 9 variable throttle valves, 10 pressure gauges, 11 solenoid valves, 12 throttlings
Valve, 13 hydrostatic support structures.
Fig. 8 is the schematic diagram of hydrostatic support principle.
Specific embodiment
To make the objectives, technical solutions and advantages of the present invention clearer, below by shown in the accompanying drawings
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 novel range.In addition, in the following description, descriptions of well-known structures and technologies are omitted, to avoid unnecessarily mixing
Confuse the concept of the utility model.
The structure composition of the utility model is as shown in Figure 1, Figure 2, Figure 3, Figure 4.The utility model is a kind of the quiet of anti-bias load
Hydraulic support sealing fluid cylinder pressure, it is characterised in that including static pressure piston (5), static pressure guide sleeve (10), static pressure connector (3), piston
Bar (7), upper lower cylinder body, upper and lower cylinder cap, sealing ring (11)；The static pressure piston (5) is connected through a screw thread with piston rod (7),
The upper lower cylinder body is attached in such a way that static pressure connector (3) are using screw thread or welding, upper and lower cylinder cap with it is hydraulic
It is sealed between cylinder cylinder body using sealing ring (11), is attached by bolt；On static pressure piston (5) outer surface uniformly
The piston oil pocket (17) there are four rectangle is opened up, offers fuel feed hole in each rectangle oil pocket middle position, and in rectangle oil pocket
Both ends offer two annular piston oil unloading troughs (16), offer piston oil leak hole (18) in every annular emptying trench bottom；
The piston rod (7) uses stepped shaft structure, piston rod fuel feed hole (24) is offered at the center of path shaft end, under fuel feed hole
Side offers piston rod oil outlet (23), and guarantees that fuel feed hole and oil outlet centric angle are 45 °；With static pressure piston (5) square
Shape oil pocket opposite position opens up four equally distributed through-holes and communicates with the fuel feed hole on piston rod；Annular with static pressure piston
The position of oil unloading trough relativity opens up through-hole and communicates with piston rod oil outlet (23), and penetrates through between through-hole；The static pressure
Four I-shaped guide sleeve oil pockets (13), each I-shaped oil pocket middle position are uniformly provided on the inner wall of guide sleeve (10)
Guide sleeve fuel feed hole (8) are offered, annular guide sleeve oil unloading trough (14) are offered at the both ends of I-shaped oil pocket, in every annular
Emptying trench bottom offers guide sleeve and unloads oilhole (12)；The static pressure connector (3) is used to connect lower cylinder body, while to piston
Bar (7) plays the role of guiding, and to avoid leaking, the connector oil pocket of four rectangles is uniformly provided on connector inner wall
(20), it is offered connector fuel feed hole (4) in each rectangle oil pocket middle position, and offers two at the both ends of rectangle oil pocket
Circular connector oil unloading trough (22) offers connector oil outlet (21) in every annular emptying trench bottom.
For the working principle of the utility model as shown in figure 5, before system work, overflow valve (4) is in unloading condition, electronic
After machine (2) starting, hydraulic pump (3) starts fuel feeding, and after the charge oil pressure of hydraulic pump is stablized, the pressure for setting up overflow valve is slightly above
Operating pressure, hydraulic oil start through check valve (5), oil filter (6), smart oil filter (7), variable throttle valve (9), throttle valve (12)
To hydraulic oil supply cylinder.Hydraulic oil is flowed by the fuel feed hole of piston rod, is flowed out by the static pressure slot of piston, when reaching certain pressure
Afterwards, hydrostatic support slot is formed, piston is floated, hydraulic oil flows into the oil outlet through hydraulic cylinder in hydraulic cylinder and flows back into fuel tank (1)
Complete working cycles；The pressure oil for flowing into hydrostatic support guide sleeve floats piston rod after static pressure chamber reaches certain pressure,
Hydraulic oil flows back into fuel tank (1) completion working cycles through the oilhole that unloads of guide sleeve side.
After pressure oil flows into piston support slot or guide sleeve static-pressure oil chamber, the hydrostatic support oil with certain pressure is formed
Film forms certain bearing capacity using the pressure difference between static pressure oil groove (oil pocket), by piston (piston rod) buoyance lift and bears one
Fixed lateral load realizes the sealing and guiding of piston (piston rod), prevents piston and the hydraulic inside wall of cylinder (piston rod and splicing sleeve
Inner wall) in the dry condition directly contacted, it avoids generating piston and the hydraulic inside wall of cylinder (piston rod and splicing sleeve inner wall)
It wears and leaks.Since hydrodynamic oil film fills between piston and the hydraulic inside wall of cylinder (piston rod and guide sleeve), piston with
The hydraulic inside wall of cylinder (piston rod and guide sleeve) is separated from each other and is not directly contacted with, and friction is only liquid sticky power, greatly
Reduce conventional cylinder using sealing ring seal and generate frictional force, the vibration frequency and positioning of hydraulic cylinder can be improved
Precision.
When piston rod is by radial loadFWhen, the gap of oil pocket and piston rod changes, due to each oil pocket hydraulic oil
Inlet flow rate it is constant, i.e.,QFor a definite value, therefore, when gap changes, oil pocket pressure can also be changed correspondingly.For example,
When piston rod is by radial load as shown in FIG. 6FWhen, the gap of oil pocket 2 becomes smaller, and oil pocket pressure can become larger, on the contrary due to
The gap of oil pocket l becomes larger, and oil pocket pressure becomes smaller, thus generate a pressure difference, then generate one withFOpposite radial force
To make piston rod reach balance in some position.
The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above.Current row
The technical staff of industry is explanation described in description above it should be appreciated that the utility model is not considered as being limited by the foregoing description
The principles of the present invention, on the premise of not departing from the spirit and scope of the utility model, the utility model also have various changes
Change and improve, these various changes and improvements fall within the scope of the claimed invention.The requires of the utility model protects model
It encloses and is defined by the appending claims and its equivalent thereof.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820388797.0U CN208719050U (en) | 2018-03-22 | 2018-03-22 | A kind of anti-eccentric load hydrostatic bearing sealing hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820388797.0U CN208719050U (en) | 2018-03-22 | 2018-03-22 | A kind of anti-eccentric load hydrostatic bearing sealing hydraulic cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208719050U true CN208719050U (en) | 2019-04-09 |
Family
ID=65969343
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820388797.0U Expired - Fee Related CN208719050U (en) | 2018-03-22 | 2018-03-22 | A kind of anti-eccentric load hydrostatic bearing sealing hydraulic cylinder |
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| Country | Link |
|---|---|
| CN (1) | CN208719050U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108194453A (en) * | 2018-03-22 | 2018-06-22 | 哈尔滨理工大学 | A kind of hydrostatic support sealing fluid cylinder pressure of anti-bias load |
| CN110307206A (en) * | 2019-06-21 | 2019-10-08 | 同济大学 | A Low Internal Leakage Anti-offset Load Hydraulic Cylinder System |
| CN111735596A (en) * | 2020-08-10 | 2020-10-02 | 苏州东菱振动试验仪器有限公司 | A hydraulic vibrating table |
| CN115289096A (en) * | 2022-09-29 | 2022-11-04 | 常州市振跃液压机械有限公司 | Take auto-lock protection device's explosion-proof hydraulic cylinder |
-
2018
- 2018-03-22 CN CN201820388797.0U patent/CN208719050U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108194453A (en) * | 2018-03-22 | 2018-06-22 | 哈尔滨理工大学 | A kind of hydrostatic support sealing fluid cylinder pressure of anti-bias load |
| CN110307206A (en) * | 2019-06-21 | 2019-10-08 | 同济大学 | A Low Internal Leakage Anti-offset Load Hydraulic Cylinder System |
| CN111735596A (en) * | 2020-08-10 | 2020-10-02 | 苏州东菱振动试验仪器有限公司 | A hydraulic vibrating table |
| CN115289096A (en) * | 2022-09-29 | 2022-11-04 | 常州市振跃液压机械有限公司 | Take auto-lock protection device's explosion-proof hydraulic cylinder |
| CN115289096B (en) * | 2022-09-29 | 2023-02-03 | 常州市振跃液压机械有限公司 | Take auto-lock protection device's explosion-proof hydraulic cylinder |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190409 Termination date: 20200322 |
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| CF01 | Termination of patent right due to non-payment of annual fee |