CN101725657B - Short-stroke high-frequency-response two-way hydraulic buffer - Google Patents
Short-stroke high-frequency-response two-way hydraulic buffer Download PDFInfo
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- CN101725657B CN101725657B CN2009101541032A CN200910154103A CN101725657B CN 101725657 B CN101725657 B CN 101725657B CN 2009101541032 A CN2009101541032 A CN 2009101541032A CN 200910154103 A CN200910154103 A CN 200910154103A CN 101725657 B CN101725657 B CN 101725657B
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- plunger
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- 230000004044 response Effects 0.000 title claims abstract description 9
- 238000013016 damping Methods 0.000 claims abstract description 23
- 230000003139 buffering effect Effects 0.000 abstract description 11
- 230000033001 locomotion Effects 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 6
- 238000007789 sealing Methods 0.000 abstract description 4
- 230000001276 controlling effect Effects 0.000 description 24
- 239000003921 oil Substances 0.000 description 15
- 230000002457 bidirectional effect Effects 0.000 description 10
- 239000012530 fluid Substances 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 230000001105 regulatory effect Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000000979 retarding effect Effects 0.000 description 2
- 239000010729 system oil Substances 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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Abstract
The invention discloses a short-stroke high-frequency-response two-way hydraulic buffer, which comprises a valve bush and a plunger piston. A through working chamber is arranged in the valve bush; an orifice is formed in the plunger piston; the plunger piston and the working chamber form clearance fit; and the central axial line of the orifice of the plunger piston is the same as the central axial line of the working chamber. The short-stroke high-frequency-response two-way hydraulic buffer has few parts and saves the mounting space; the buffer can realize the two-way buffering just through arrangement on oil passages, and can be conveniently integrated in an actuator to save the outside mounting space; the buffer has no moveable sealing member inside, so the service life is long; the short-stroke high-frequency-response two-way hydraulic buffer realizes the two-way movement buffering under the condition of short plunger stroke, ensures the normal working of the actuator at a high frequency, conveniently adjusts the damping force and the initial point of the damping action, and has a good damping effect.
Description
Technical field
The present invention relates to a kind of two-way hydraulic buffer, be particularly useful for frequency of okperation height, working stroke weak point, and need the hydraulic actuator of bidirectional buffering.
Background technique
Conventional two-way hydraulic buffer generally is made up of oil cylinder, cushion pad, piston rod, piston etc., produces damping force and realizes the buffer-braking function thereby force during piston motion fluid to flow through throttle orifice.But the buffer of this kind structure type has several defectives: the one, and complex structure, component are too much, when buffer is integrated in the hydraulic actuator, will certainly increase the volume of final controlling element, are not suitable for the limited occasion of installing space; The 2nd, the distance that buffering course needs, for the short occasion of final controlling element working stroke, cushioning effect is bad; Three are to use the life-span short, and during long-term work, the inner dynamic seal of buffer can influence cushioning effect even make the buffer inefficacy after producing wearing and tearing final controlling element under high frequency.
Summary of the invention
The objective of the invention is the problem that in practical application, exists to conventional two-way hydraulic buffer, a kind of two-way hydraulic buffer of short-stroke high-frequency-response of simple in structure, advantages of small volume is provided.
For realizing above-mentioned purpose; The technological means that the present invention taked is: the two-way hydraulic buffer of this short-stroke high-frequency-response mainly comprises valve pocket and plunger; Be provided with the active chamber of perforation in the said valve pocket; Be provided with throttle orifice in the plunger, plunger and active chamber form Spielpassung, and the central axis of the throttle orifice of plunger is identical with the central axis of active chamber.
Further, the present invention is built-in with controlling device at the throttle orifice of said plunger, and the throttle orifice of this controlling device and plunger forms screw-thread fit, and the inside of said controlling device is provided with damping hole.
Compared with prior art, advantage of the present invention is:
(1) component that adopt are few, practice thrift installing space.Buffer only need be installed on the oil circuit of final controlling element can realize bidirectional buffering, can be integrated into final controlling element inside easily, does not take outside installing space.The inner stationary seal spare of buffer, long service life.
(2) under the short situation of plunger stroke, realize the bidirectional-movement buffering, guaranteed final controlling element proper functioning under high frequency.
The starting point of (3) damping size adjustment, damping function is easy to adjust, and damping is good.
Description of drawings
Fig. 1 is the use principle figure of a kind of mode of execution of bidirectional buffer of the present invention;
Fig. 2 is the use principle figure of the another kind of mode of execution of bidirectional buffer of the present invention;
Fig. 3 is the structural representation of bidirectional buffer of the present invention.
Fig. 4 is the structure sectional view of a kind of controlling device of bidirectional buffer of the present invention.
Embodiment
As shown in Figure 3, bidirectional buffer of the present invention mainly is made up of valve pocket 1, plunger 3, and valve pocket 1 inside is provided with the active chamber 9 of perforation; Plunger 3 is a moving element; It does axially reciprocating in active chamber 9, the effective depth of active chamber 9 is greater than the length of plunger 3, and the internal diameter of active chamber 9 must guarantee that it is a Spielpassung with cooperating of plunger 3; Can be as required in the industrial realization cylindrical of plunger 3 be carried out match grinding, be integrated on the final controlling element internal oil passages after valve pocket 1 and plunger 3 are assembled.
Can be as shown in Figure 1 when a kind of bidirectional buffer of the present invention is installed in the final controlling element 8.Valve pocket 1 inside is provided with the active chamber 9 of perforation, round-formed Spielpassung in the cylindrical of plunger 3 and the active chamber 9, and plunger 3 inside are provided with axial throttle orifice 10, and the central axis of throttle orifice 10 is identical with the central axis of active chamber 9.High-voltage oil liquid rises active chamber 9 internal pressures after getting into active chamber 9 through final controlling element 8 left end oil circuits, and high-voltage oil liquid promotes plunger 3 and moves right fast; Owing to be a sealing cavity volume between the sleeve 5 of plunger 3 and final controlling element 8; The work plunger 6 that makes the inner fluid of cavity volume promote final controlling element 8 quickens to move right, and after plunger 3 moved to active chamber 9 ends, high-voltage oil liquid was through throttle orifice 10 throttlings; The movement velocity of reduction work plunger 6 realizes that the working stroke of work plunger 6 cushions; After removing system oil pressure; Work plunger 6 under the effect of Returnning spring or outer load force to left movement, this moment plunger 3 with sleeve 5 between remain a sealing cavity volume, 3 acceleration of the inner fluid promotion of cavity volume plunger are to left movement; When plunger 3 moves to the high order end of active chamber 9; Fluid reduces the movement velocity of work plunger 6 through throttle orifice 10 throttlings, realizes the returning buffering of work plunger 6.In the practical application O type circle 7, valve pocket 1, plunger 3 are installed to the oil circuit that final controlling element inside needs buffering after assembling; On the oil circuit like the plunger 6 of working among Fig. 1; High-voltage oil liquid is necessary before earlier through the buffer oil circuit from the active chamber of final controlling element left end oil circuit entering work plunger 6, thereby the motion of the work of realization plunger cushions.
The another kind of mode of execution of bidirectional buffer of the present invention such as Fig. 2, shown in Figure 4; It has installed a controlling device 2 with the different inside of the throttle orifice 10 of plunger 3 that are of above-mentioned mode of execution; Pass through screw-thread fit between the throttle orifice 10 of plunger 3 and the controlling device 2; Controlling device 2 is the outside thread link that an inside is provided with axial damping hole 4, for example screw, double-screw bolt etc.According to the size of the required damping force of actual conditions,, and do not need the exchange buffering device as long as just can satisfy the demand of different damping power easily through changing controlling device 2.The damping force of industry spot all needs back and forth repetition test to confirm under a lot of situation, and the present invention can simplify debug process through changing controlling device 2, has the advantage that significantly improves operating efficiency, is easy to safeguard.High-voltage oil liquid is become through damping hole 4 throttlings by original throttle orifice 10 throttlings of passing through after getting into the active chamber 9 of valve pocket 1, to realize the bidirectional buffering of work plunger 6.It is relevant with the idle stroke of the size of damping hole 4, plunger 3 that buffer parameter is regulated, and the damping size can be regulated through the opening diameter that changes damping hole 4, and the starting point of damping is regulated through the length of change plunger 3.In actual the use, plunger 3 moves to from the high order end of active chamber 9 and is no buffer stage this section of low order end process, and work plunger 6 is able to the fastest speed realization accelerated motion.After plunger 3 arrived active chamber 9 low order ends, high-voltage oil liquid passed through damping hole 4 throttlings, work plunger 6 retarding braking under the load effect; After system removes oil pressure; Work plunger 6 reversing motion under the load effect, the fluid in the sealing cavity volume also promotes plunger 3 reversing motions, and plunger 3 moves to this section of high order end process from the low order end of active chamber 9 and is no buffer stage; Work plunger 6 is able to the fastest speed and realizes accelerated motion; After plunger 3 arrived active chamber 9 high order ends, fluid passed through damping hole 4 throttlings, work plunger 6 retarding brakings.
Buffer of the present invention is verified on certain type hydraulic actuator; The initialization system oil pressure is that 160bar, final controlling element frequency of okperation are that 20Hz is with the interior buffering that can realize work plunger under the 5mm stroke; Change the size that the damping hole size can be regulated damping on the controlling device, the length that changes plunger can be regulated the starting point of damping function.
Claims (2)
1. the two-way hydraulic buffer of a short-stroke high-frequency-response; It is characterized in that: it comprises valve pocket (1) and plunger (3); Be provided with the active chamber (9) of perforation in the said valve pocket (1); Be provided with throttle orifice (10) in the plunger (3); Plunger (3) forms Spielpassung with active chamber (9), and the effective depth of active chamber (9) can be done axially reciprocating greater than the length and the plunger (3) of plunger (3) in active chamber 9, and the central axis of the throttle orifice (10) of plunger (3) is identical with the central axis of active chamber (9).
2. the two-way hydraulic buffer of a kind of short-stroke high-frequency-response according to claim 1; It is characterized in that: the throttle orifice (10) in said plunger (3) is built-in with controlling device (2); This controlling device (2) forms screw-thread fit with the throttle orifice (10) of plunger (3), and the inside of said controlling device (2) is provided with damping hole (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101541032A CN101725657B (en) | 2009-11-09 | 2009-11-09 | Short-stroke high-frequency-response two-way hydraulic buffer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101541032A CN101725657B (en) | 2009-11-09 | 2009-11-09 | Short-stroke high-frequency-response two-way hydraulic buffer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101725657A CN101725657A (en) | 2010-06-09 |
| CN101725657B true CN101725657B (en) | 2012-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101541032A Active CN101725657B (en) | 2009-11-09 | 2009-11-09 | Short-stroke high-frequency-response two-way hydraulic buffer |
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| CN (1) | CN101725657B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102476571B (en) * | 2010-11-23 | 2014-03-26 | 高献民 | Automatic variable resistance active suspension frame for automobile |
| KR101925450B1 (en) * | 2016-12-07 | 2018-12-06 | 주식회사 한국가스스프링 | A gas cylinder with a speed controller |
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2009
- 2009-11-09 CN CN2009101541032A patent/CN101725657B/en active Active
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| CN101725657A (en) | 2010-06-09 |
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