CN105909583B - Buffer relief valve and hydraulic system - Google Patents
Buffer relief valve and hydraulic system Download PDFInfo
- Publication number
- CN105909583B CN105909583B CN201610117751.0A CN201610117751A CN105909583B CN 105909583 B CN105909583 B CN 105909583B CN 201610117751 A CN201610117751 A CN 201610117751A CN 105909583 B CN105909583 B CN 105909583B
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- Prior art keywords
- valve
- valve element
- buffering
- oil
- surge chamber
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/025—Pressure reducing valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/20—Excess-flow valves
- F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
- F16K17/24—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member
- F16K17/28—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only
- F16K17/30—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only spring-loaded
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Safety Valves (AREA)
Abstract
The invention discloses a kind of buffer relief valve to be provided with valve seat, valve body, differential valve element, buffering valve element and back-moving spring, valve body is fixedly connected with valve seat, the first hydraulic fluid port is provided with valve seat, the second hydraulic fluid port is provided with valve body, differential valve element is gentle to be rushed valve element and is slideably positioned in valve body, buffer in the first end of valve element and be provided with the first surge chamber, its second end is provided with the second surge chamber；Axially disposed on differential valve element to have the first damping oil duct, the first damping oil duct connects the first hydraulic fluid port and the first surge chamber；Axially disposed on buffering valve element to have the second damping oil duct, the second damping oil duct connects the first surge chamber and the second surge chamber.Compared with prior art, the axially disposed second damping oil duct on buffering valve element, and the second surge chamber is arranged in buffering valve element second end, on the premise of pooling feature is realized, the structure of buffer relief valve is simplified, is offered convenience to processing and manufacturing.The present invention also proposes a kind of hydraulic system with above-mentioned buffer relief valve.
Description
Technical field
The present invention relates to hydraulic transmission technology, and in particular to a kind of buffer relief valve and hydraulic system.
Background technology
Hydraulic drive is to transmit a kind of kind of drive of motion and power in closed hydraulic system using hydraulic oil,
With stepless time adjustment, speed adjustable range is big, reacts many advantages, such as quick, is widely used to all kinds of Work machines or delivery vehicle
On.
Generally, hydraulic system includes dynamical element, executive component, auxiliary element, hydraulic oil (also referred to as working media) and control
The major parts such as element processed, the effect of dynamical element are that the mechanical energy of prime mover input is converted into the pressure energy of hydraulic oil, liquid
Force feed is supplied to executive component by oil pipe, and common dynamical element is hydraulic pump.The effect of executive component is by hydraulic oil
Pressure energy is converted into mechanical energy, drives operating mechanism's action, and typical executive component has hydraulic motor, hydraulic jack etc..Control
The effect of element is pressure, flow and the flow direction of fluid in control and regulation hydraulic system, to ensure that operating mechanism completes
It is required that action, control element is generally various hydraulic pressure valve elements.The effect auxiliary hydraulic system of auxiliary element is completed normal
Work, such as fuel tank, oil pipe, filter etc..
In hydraulic system, executive component starts or stops, and inevitably causes the pressure in hydraulic system anxious
Increase severely big, the pressure that increased dramatically is easy to damage hydraulic components.In order to reduce the negative effect that hydraulic shock is brought, generally
Hydraulic system appropriate location install buffer relief valve, using buffer relief valve can with the pressure oscillation of suppression system,
And then reduce the fault rate of complete machine；However, common buffer relief valve structure is excessively complicated, difficulty of processing is larger, and assembling will
Ask high.
The content of the invention
In view of this, the present invention proposes a kind of buffer relief valve, compared with prior art, the buffer relief valve structure
Simply, it is easy to process.On this basis, the present invention also proposes a kind of hydraulic system with the buffer relief valve.
As in a first aspect, the present invention proposes a kind of buffer relief valve；The buffer relief valve include valve seat, valve body,
Differential valve element, buffering valve element and back-moving spring, the valve seat are fixedly connected with the valve body, and the valve seat is provided with the first hydraulic fluid port, institute
State and the second hydraulic fluid port and valve pocket are provided with valve body, the differential valve element is gentle to be rushed valve element and be slideably positioned in the valve pocket, institute
The first end and valve pocket inwall for stating differential valve element are slidably connected, and the plug at end part of first end is on the first hydraulic fluid port, described differential
Second end of valve element is slidably arranged in the first end of buffering valve element；The back-moving spring is set on different valve core, and is resetted
One end contact of spring is in the first end of differential valve element, and its other end contact is on spring base；The first of the buffering valve element
The first surge chamber is provided with end, its second end is provided with the second surge chamber；It is axially disposed on the differential valve element to have first
Oil duct is damped, the first damping oil duct connects the first hydraulic fluid port and the first surge chamber；It is axially disposed on the buffering valve element to have second
Oil duct is damped, the second damping oil duct connects the first surge chamber and the second surge chamber.
Preferably, the valve body includes valve body and adjusting set, and adjusting set is movably arranged on valve body, the adjusting set
It is slideably positioned in by spring base contact in the end of the back-moving spring, the buffering valve element in adjusting set.
Preferably, screw thread is provided with the inwall of the valve body and the periphery wall of adjusting set, the adjusting set passes through
Screw thread is connected with valve body.
Preferably, choke plug is provided with the second damping oil duct, the choke plug is arranged on the second of buffering valve element
End is internal；Or it is provided with throttle orifice on the second damping oil duct.
Preferably, fixing nut, the fixing nut and regulation are provided with the periphery at the second end of the buffering valve element
Set inwall is slidably connected, and is provided with limited step on adjusting set inwall.
Preferably, the first damping cavity, the periphery of the fixing nut are provided between the fixing nut and limited step
The 3rd damping oil duct is provided between wall and the inwall of adjusting set, the 3rd damping oil duct connects the second surge chamber and the first resistance
Buddhist nun's chamber.
Preferably, it is provided with multiple tracks grading ring on the outer wall of the second end of the differential valve element and the buffering valve element contact
Groove.
Preferably, the second damping cavity, institute are provided between the outer wall and adjusting set inwall of the first end of the buffering valve element
State the second damping cavity and be used for the accommodating hydraulic oil that is permeated from the first damping cavity and the second surge chamber.
Preferably, radial direction oil leak hole and axial oil leak hole are provided with the adjusting set, the radial direction oil leak hole, is axially let out
Oilhole is connected with the second damping cavity.
As second aspect, the present invention proposes a kind of hydraulic system；The hydraulic system include pressure oil-source, hydraulic motor,
The buffer relief valve of hydraulic oil container and above-mentioned any one, oil inlet, the buffer-type of the pressure oil-source and hydraulic motor overflow
Flow the first hydraulic fluid port connection of valve, the second hydraulic fluid port connection of the oil return opening, buffer relief valve of the hydraulic oil container and hydraulic motor.
Buffer relief valve proposed by the present invention is provided with valve seat, valve body, differential valve element, buffering valve element and back-moving spring,
Valve body is fixedly connected with valve seat, is provided with the first hydraulic fluid port and the second hydraulic fluid port on valve seat, and differential valve element is gentle to be rushed valve element and slide and set
It is placed in valve body, buffers and the first surge chamber is provided with the first end of valve element, its second end is provided with the second surge chamber；Different valve
Axially disposed on core to have the first damping oil duct, the first damping oil duct connects the first hydraulic fluid port and the first surge chamber；Buffer on valve element
Axially disposed to have the second damping oil duct, the second damping oil duct connects the first surge chamber and the second surge chamber.With prior art phase
Than, the axially disposed second damping oil duct on buffering valve element, and the second surge chamber is arranged in buffering valve element second end, in reality
On the premise of existing pooling feature, the structure of buffer relief valve is simplified, is offered convenience to processing and manufacturing.
Brief description of the drawings
The accompanying drawing for forming the part of the present invention is used for providing a further understanding of the present invention, schematic reality of the invention
Apply example and its illustrate to be used to explain the present invention, do not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the structural representation for the buffer relief valve that the specific embodiment of the invention provides；
Fig. 2 is the structural representation for the valve seat that the specific embodiment of the invention provides；
Fig. 3 is the structural representation for the adjusting set that the specific embodiment of the invention provides；
Fig. 4 is the structural representation for the differential valve element that the specific embodiment of the invention provides；
Fig. 5 is the structural representation for the buffering valve element that the specific embodiment of the invention provides；
Fig. 6 is the structural representation for the choke plug that the specific embodiment of the invention provides；
Fig. 7 is the structural representation for the fixing nut that the specific embodiment of the invention provides.
Description of reference numerals：
1-valve seat, 2-valve body 3-differential valve element 4-buffering 5-back-moving spring of valve element
6-adjusting set, 7-locking nut, 8-fixing nut, 9-screw plug, 10-spring base
11-the first the 13-the first axial oil duct of the 12-the second hydraulic fluid port of hydraulic fluid port
14-the first the 16-the second axial oil duct of the 15-the second surge chamber of surge chamber
17-the second 18-choke plug of damping cavity the 19-the first damping cavity 21-valve ante-chamber
22-valve back cavity 31-valve rod, 32-valve head, 33-first segment discharge orifice
34-the first grading ring groove 41-buffering ante-chamber 42-buffering back cavity
43-the second grading ring groove 61-left chamber, 62-right chamber, 63-adapter cavity
64-radial direction oil leak hole 65-axial oil leak hole
Embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.1 to 7 pair of specific embodiment of the invention is described in detail below in conjunction with the accompanying drawings.
The buffer relief valve that the specific embodiment of the invention proposes includes valve seat 1, valve body, adjusting set 6, differential valve element 3, slow
Valve element 4 and back-moving spring 5 are rushed, is provided with the first hydraulic fluid port 11 on valve seat 1, valve body includes valve body 2 and adjusting set 6, on valve body 2
The second hydraulic fluid port 12 is provided with, valve body 2 is fixedly connected with valve seat 1；As shown in Fig. 2 valve body 2 is internally provided with the He of valve ante-chamber 21
Valve back cavity 22, valve ante-chamber 21 are located at the left end of valve body 2, and valve back cavity 22 is located at the right-hand member of valve body 2, and the second hydraulic fluid port 12 is radially
It is arranged on valve ante-chamber 21, internal thread is provided with the inwall of valve back cavity 22.
As shown in figure 3, the left end of adjusting set 6 is provided with left chamber 61, the right-hand member of adjusting set 6 is provided with right chamber 62, left chamber 61
Adapter cavity 63 is provided between right chamber 62, external screw thread is provided with the periphery wall of the left end of adjusting set 6, after the external screw thread and valve
Screw-internal thread fit on the inwall of chamber 22.
As shown in figure 4, differential valve element 3 includes valve head 32 and valve rod 31, valve head 32 is located at the left end of valve rod 31, valve rod 31
It is provided with the first grading ring groove 34 on right-hand member outer wall, it is axially disposed on differential valve element 3 to have the first damping oil duct, the first damping oil
Road specifically includes the first axial oil duct 13 and first segment discharge orifice 33, and first segment discharge orifice 33 is arranged on valve head 32, the first axial oil
Road 13 is through valve rod 31 and extends at first segment discharge orifice 33.
As shown in figure 5, buffering valve element 4 includes buffering ante-chamber 41, buffering back cavity 42, buffering ante-chamber 41 is positioned at buffering valve element 4
Left end, buffering back cavity 42 positioned at the right-hand member of buffering valve element 4, buffer it is axially disposed on valve element 4 have the second damping oil duct, second
Damping oil duct includes the second axial throttle orifice of oil duct 16 and second, after the second axial oil duct 16 is arranged on buffering ante-chamber 41 and buffering
Between chamber 42, the second throttle orifice is arranged on choke plug 18, and external screw thread is provided with the periphery wall of choke plug 18, and the external screw thread is with delaying
The screw-internal thread fit rushed on the inwall of back cavity 42, buffer and be provided with external screw thread on the right-hand member periphery wall of valve element 4, be connected through a screw thread solid
Determine nut 8.
As shown in figure 1, on buffer relief valve, adjusting set 6 is movably connected on valve body 2 by screw thread, adjusting set 6
It can be moved axially by rotation in valve back cavity 22, for the relative position of secured adjusted set 6 and valve body 2, in valve body 2
Locking nut 7 is provided between adjusting set 6.The inwall of the valve head 32 and valve ante-chamber 21 of differential valve element 3 is slidably connected, valve head 32
On the first hydraulic fluid port 11, the right-hand member of slide bar is slidably arranged in buffering ante-chamber 41 conical surface contact, in buffering ante-chamber 41 formed with
First surge chamber 14；Buffering valve element 4 is slidably arranged in adjusting set 6, and the right-hand member for buffering valve element 4 passes through the transition of adjusting set 6
Chamber 63, and the right chamber 62 of adjusting set 6 is extended to, it is provided with the second grading ring groove 43, the right-hand member of adjusting set 6 on buffering valve element 4
On be provided with screw plug 9, buffer between the right-hand member and screw plug 9 of valve element 4 formed with the second surge chamber 15, in fixing nut 8 and right chamber
Formed with the first damping cavity 19 between 62 step, formed with the second damping cavity between the outer wall of left chamber 61 and buffering ante-chamber 41
17；Gap is provided between fixing nut 8 and adjusting set 6, the gap has damping action, and under pressure, hydraulic oil can
To flow to the first damping cavity 19 from the second surge chamber 15；Flowed out in order to facilitate hydraulic oil, be provided with adjusting set 6 and radially let out
Oilhole 64 and axial oil leak hole 65, radial direction oil leak hole 64 and axial oil leak hole 65 connect with the second damping cavity 17.Back-moving spring 5
It is set on the valve rod 31 of differential valve element 3, its left end is resisted against on valve head 32, and right-hand member is resisted against on spring base 10, spring base 10
It is slidably located on valve rod 31, the right side of spring base 10 is resisted against the left end of buffering valve element 4 or the left end end face of adjusting set 6
On, in the presence of back-moving spring 5, differential valve element 3 compresses to the first hydraulic fluid port 11, in adjusting set 6 or buffers driving for valve element 4
Under, spring base 10 is moved to the left along valve rod 31.
During work, the first hydraulic fluid port 11 is connected with the high-pressure oil passage of hydraulic system, the second hydraulic fluid port 12 and the low pressure of hydraulic system
Oil circuit connects；The operation principle of the buffer relief valve is：Pressure at first hydraulic fluid port 11 with hydraulic system pressure rise, when
First predetermined value is increased to, it is differential when the stress of the differential left end of valve element 3 is more than the resistance of the surge chamber 14 of back-moving spring 5 and first
Valve element 3 moves right, and the first hydraulic fluid port 11 connects with the second hydraulic fluid port 12, and hydraulic oil flows from high pressure side toward low pressure side, high pressure
The increase tendency of the pressure of oil circuit slows down or stopped, meanwhile, hydraulic oil enters the first surge chamber 14 through the first damping oil duct,
As the pressure of the first surge chamber 14 is stepped up, when the active force of the first surge chamber 14 and back-moving spring 5 is more than differential valve element 3
During the stress of left end, differential valve element 3 is moved to the left, and closes the first hydraulic fluid port 11, and the pressure of hydraulic system high-pressure oil passage continues to raise；
As pressure continues to raise, differential valve element 3 moves right again, and the first hydraulic fluid port 11 and the second hydraulic fluid port 12 turn on, high-pressure oil passage
Pressure slows down increase tendency again, meanwhile, the hydraulic oil in the first surge chamber 14 enters the second surge chamber 15, and hydraulic oil passes through
3rd damping oil duct shifts to the first damping cavity 19, has delayed the pressure rise time of the second surge chamber 15 to a certain extent, when
When the pressure rise of second surge chamber 15 to the stress for buffering the right-hand member of valve element 4 is more than left end, buffering valve element 4 is moved to the left, and then
Compression reseting spring 5, until fixing nut 8 is moved to the right side of adjusting set 6, pooling feature is completed, it is slow in back-moving spring 5 and first
Rush under the active force of room 14, differential valve element 3 is moved to the left, and then closes the first hydraulic fluid port 11.Above whole process is very of short duration, main
Play and start the steadily pressure oscillation with effective suppression system.The pressure of hydraulic system high-pressure oil passage continues to raise, and works as pressure
It is poor when the stress of the differential left end of valve element 3 overcomes 5 and first 14 resistance of surge chamber of back-moving spring again when being increased to overflow threshold values
Movable valve plug 3 moves right, and high-pressure oil passage starts pressure release, prevents hypertonia, realizes overflow valve relief function.
According to above-mentioned operation principle it is recognised that by first damping oil duct, the first surge chamber 14, second damp oil duct,
The synergy of second surge chamber 15 and back-moving spring 5, the pressure of high-pressure oil passage are stepped up, and avoid system pressure drastically
Negatively affected caused by rise；Also, when the pressure of high-pressure oil passage reaches overflow threshold values, actively high-pressure oil passage is let out
Pressure, prevents from overloading.
During buffering valve element 4 is moved to the left, the hydraulic oil in the first damping cavity 19 can be through the 3rd damping oil duct
Flow to the second surge chamber 15, due to the damping action of the first damping cavity 19, process that buffering valve element 4 is moved to the left more slowly,
It is more steady, finally slow down the process of high-pressure oil passage pressure rise.
When the first hydraulic fluid port 11 pressure as little as to a certain degree, back-moving spring 5 drives differential valve element 3 to be moved to the left, trimmer valve
Core 4 moves right, and is finally reset to original state.The hydraulic oil of second damping cavity 17, by buffering in valve element 4 and adjusting set 6
Gap, radial direction oil leak hole 64 and axial oil leak hole 65 discharge, the hydraulic oil of the second surge chamber 15 enters by the 3rd damping oil duct
Enter the first damping cavity 19, all serve certain buffering effect.
In the above-described embodiments, by set the first grading ring groove 34, can prevent differential valve element 3 with buffering valve element 4 it
Between there is catching phenomenon, ensure differential valve element 3 and buffering valve element 4 between smooth can slide；Similarly, pressed by setting second
It annular groove 43, can prevent occurring catching phenomenon between buffering valve element 4 and adjusting set 6, ensure between buffering valve element 4 and adjusting set 6
Smooth it can slide.
In other embodiments, the second throttle orifice can be directly in the second axial oil duct 16, and then can remove throttling
Stifled 18.
Compared with prior art, above-mentioned buffer relief valve has advantages below：It is simple and compact for structure, small volume, add
Work is easy for installation, reduces clamping stagnation risk；Effective absorption system pressure pulse, surge suppressing, extends machine life.
In addition, the specific embodiment of the invention also proposes a kind of hydraulic system, including pressure oil-source, hydraulic motor, hydraulic oil
The oil inlet of case and above-mentioned buffer relief valve, pressure oil-source and hydraulic motor, the first hydraulic fluid port 11 of buffer relief valve connect
Connect, the oil return opening of hydraulic oil container and hydraulic motor, the second hydraulic fluid port 12 of buffer relief valve connect.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God any modification, equivalent substitution and improvements made etc., should be included in the scope of the protection with principle.
Claims (5)
- A kind of 1. buffer relief valve, it is characterised in that including valve seat (1), valve body, differential valve element (3), buffering valve element (4) and Back-moving spring (5), the valve seat (1) are fixedly connected with the valve body, and the valve seat (1) is provided with the first hydraulic fluid port (11), the valve body On be provided with the second hydraulic fluid port (12) and valve pocket, the differential valve element (3) and buffering valve element (4) are slideably positioned in the valve pocket Interior, the first end of the differential valve element (3) is slidably connected with valve pocket inwall, and the plug at end part of first end is in the first hydraulic fluid port (11) On, the second end of the differential valve element (3) is slidably arranged in the first end of buffering valve element (4)；The back-moving spring (5) is arranged On differential valve element (3), and one end contact of back-moving spring (5), in the first end of differential valve element (3), its other end contact exists On spring base (10)；The first surge chamber (14) is provided with the first end of the buffering valve element (4), its second end is provided with second Surge chamber (15)；Axially disposed on the differential valve element (3) to have the first damping oil duct, the first damping oil duct connects the first hydraulic fluid port And the first surge chamber (14) (11)；Axially disposed on the buffering valve element (4) to have the second damping oil duct, the second damping oil duct connects Connect the first surge chamber (14) and the second surge chamber (15)；The valve body includes valve body (2) and adjusting set (6), and adjusting set (6) is movably arranged on valve body (2), the regulation Cover (6) and regulation is slideably positioned in the end of the back-moving spring (5), the buffering valve element (4) by spring base (10) contact Cover in (6)；Screw thread is provided with the inwall of the valve body (2) and the periphery wall of adjusting set (6), the adjusting set (6) passes through spiral shell Line is connected with valve body (2)；Choke plug (18) is provided with the second damping oil duct, the choke plug (18) is arranged on the second of buffering valve element (4) End is internal；Or it is provided with throttle orifice on the second damping oil duct；Fixing nut (8), the fixing nut (8) and adjusting set are provided with the periphery at the second end of the buffering valve element (4) (6) inwall is slidably connected, and is provided with limited step on adjusting set (6) inwall；The fixing nut (8) is provided with the first damping cavity (19), the periphery wall of the fixing nut (8) between limited step Be provided between the inwall of adjusting set (6) the 3rd damping oil duct, it is described 3rd damping oil duct connect the second surge chamber (15) with First damping cavity (19).
- 2. buffer relief valve according to claim 1, it is characterised in that the second end of the differential valve element (3) and institute State and be provided with multiple tracks grading ring groove on the outer wall of buffering valve element (4) contact.
- 3. buffer relief valve according to claim 1, it is characterised in that outside the first end of the buffering valve element (4) The second damping cavity (17) is provided between wall and adjusting set (6) inwall, second damping cavity (17) is used for accommodating from the first resistance The hydraulic oil that Buddhist nun's chamber (19) and the second surge chamber (15) are permeated.
- 4. buffer relief valve according to claim 3, it is characterised in that be provided with the adjusting set (6) and radially let out Oilhole (64) and axial oil leak hole (65), the radial direction oil leak hole (64), axial oil leak hole (65) with the second damping cavity (17) Connection.
- 5. a kind of hydraulic system, it is characterised in that appoint including pressure oil-source, hydraulic motor, hydraulic oil container and Claims 1-4 Buffer relief valve described in meaning one, the oil inlet of the pressure oil-source and hydraulic motor, the first oil of buffer relief valve Mouth (11) connection, the second hydraulic fluid port (12) connection of the oil return opening, buffer relief valve of the hydraulic oil container and hydraulic motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610117751.0A CN105909583B (en) | 2016-03-02 | 2016-03-02 | Buffer relief valve and hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610117751.0A CN105909583B (en) | 2016-03-02 | 2016-03-02 | Buffer relief valve and hydraulic system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105909583A CN105909583A (en) | 2016-08-31 |
| CN105909583B true CN105909583B (en) | 2018-01-30 |
Family
ID=56745086
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610117751.0A Active CN105909583B (en) | 2016-03-02 | 2016-03-02 | Buffer relief valve and hydraulic system |
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| CN (1) | CN105909583B (en) |
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| KR102151124B1 (en) * | 2018-12-19 | 2020-09-02 | 주식회사 두산 | Relief valve apparatus |
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| CN113418023B (en) * | 2021-01-29 | 2024-05-17 | 涌镇液压机械（上海）有限公司 | Reversing valve capable of being switched at high frequency |
| CN113653695B (en) * | 2021-08-30 | 2023-08-25 | 杭州力龙液压有限公司 | Balancing valve structure and engineering machinery |
| CN113775590A (en) * | 2021-10-18 | 2021-12-10 | 山东泰丰智能控制股份有限公司 | Constant pressure differential valve with buffering function |
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| CN102913513A (en) * | 2012-10-31 | 2013-02-06 | 陕西航天动力高科技股份有限公司 | High-reliability directly operated type safety valve device with hydraulic balance principle |
| CN102996557A (en) * | 2012-12-27 | 2013-03-27 | 宁波广天赛克思液压有限公司 | Pressure adjustable buffer overflow valve |
| CN103477134A (en) * | 2011-06-08 | 2013-12-25 | 川崎重工业株式会社 | Relief valve |
| CN103697019A (en) * | 2013-12-27 | 2014-04-02 | 龙工（上海）精工液压有限公司 | Safety valve for motor of excavator |
| CN205503597U (en) * | 2016-03-02 | 2016-08-24 | 杭州力龙液压有限公司 | Buffering formula overflow valve and hydraulic system |
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| CN202073860U (en) * | 2011-06-01 | 2011-12-14 | 宁波克泰液压有限公司 | Threaded plug-in adjustable buffer overflow valve |
| CN103477134A (en) * | 2011-06-08 | 2013-12-25 | 川崎重工业株式会社 | Relief valve |
| CN202182080U (en) * | 2011-08-15 | 2012-04-04 | 宁波广天赛克思液压有限公司 | Overflow valve with secondary buffering function for hydraulic pump |
| CN102913513A (en) * | 2012-10-31 | 2013-02-06 | 陕西航天动力高科技股份有限公司 | High-reliability directly operated type safety valve device with hydraulic balance principle |
| CN102996557A (en) * | 2012-12-27 | 2013-03-27 | 宁波广天赛克思液压有限公司 | Pressure adjustable buffer overflow valve |
| CN103697019A (en) * | 2013-12-27 | 2014-04-02 | 龙工（上海）精工液压有限公司 | Safety valve for motor of excavator |
| CN205503597U (en) * | 2016-03-02 | 2016-08-24 | 杭州力龙液压有限公司 | Buffering formula overflow valve and hydraulic system |
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| CN105909583A (en) | 2016-08-31 |
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