CN106015144B - Hydraulic unloading device - Google Patents
Hydraulic unloading device Download PDFInfo
- Publication number
- CN106015144B CN106015144B CN201610561826.4A CN201610561826A CN106015144B CN 106015144 B CN106015144 B CN 106015144B CN 201610561826 A CN201610561826 A CN 201610561826A CN 106015144 B CN106015144 B CN 106015144B
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- China
- Prior art keywords
- oil
- cavity volume
- valve element
- pressure
- valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
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- 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
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
- F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
- F16K11/0655—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with flat slides
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/25—Pressure control functions
- F15B2211/253—Pressure margin control, e.g. pump pressure in relation to load pressure
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/50—Pressure control
- F15B2211/505—Pressure control characterised by the type of pressure control means
- F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
- F15B2211/50536—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using unloading valves controlling the supply pressure by diverting fluid to the return line
Abstract
The invention discloses a kind of hydraulic unloading device,Including valve body and the first valve element,Valve pocket and the second valve element,Cavity volume A,Cavity volume B,Cavity volume C,Cavity volume D,Oil duct P and oil duct Ls for the oil-feed and oil duct T and oil duct Ts for oil return,Oil duct P pressure oil is connected with cavity volume A and cavity volume C respectively after entering the first valve element,Pressure oil in cavity volume A and cavity volume C is respectively acting on the first valve element left and right ends,Oil duct Ls pressure oil is connected after entering the first valve element with cavity volume B,Pressure oil in cavity volume B acts on the first valve element and the second valve element,The oil duct Ts is connected by the second valve element with cavity volume D,The pressure that cavity volume A acts on the first valve element is more than cavity volume B,When cavity volume C acts on the pressure of the first valve element with the first spring pressure sum,The movement of first valve element makes oil duct P be connected with oil duct T with pressure unloading oil.By the above-mentioned means, hydraulic unloading device of the present invention, the function of pressure unloading can be controlled according to load pressure, system power dissipation is further reduced.
Description
Technical field
The present invention relates to hydraulic system field, more particularly to a kind of hydraulic unloading device.
Background technology
In hydraulic circuit, in the hydraulic system that particularly constant displacement pump is formed with load sensing multi-way valve, when system work
Make in holding state, system oil pressure relief is high, and power loss is big.The hydraulic power source of constant displacement pump composition mainly has two kinds, when：It is fixed
Measure pump and form constant pressure source with overflow valve, system oil pressure relief is high, is relief valve set pressure；Second,：Constant displacement pump and three-way pressure
The hydraulic power source that compensator is formed, system oil pressure relief add three with load feedback pressure change, its oil pressure relief equal to load pressure
Logical pressure compensator setting value（Generally 14 ~ 20bar）.This two kinds of oil pressure reliefs are larger, and power loss needs further to be dropped
It is low.
The content of the invention
The present invention solves the technical problem of a kind of hydraulic unloading device is provided, it can control and unload according to load pressure
The function of lotus pressure, makes system power dissipation further reduce.
In order to solve the above technical problems, one aspect of the present invention is：A kind of hydraulic unloading device is provided, wrapped
Include valve body and be sequentially connected and be located in the first valve element in valve body, valve pocket and the second valve element, first valve element and valve body
Connection forms cavity volume A, is connected between first valve element, the second valve element and valve pocket and forms cavity volume B, first valve element, valve pocket
Connection forms cavity volume C between valve body, is connected between second valve element, valve pocket and valve body and forms cavity volume D, set on the valve body
Have and enter for the oil duct P and oil duct Ls of oil-feed and the oil duct T for oil return and oil duct Ts, the oil duct P pressure oil
It is connected respectively with cavity volume A and cavity volume C after one valve element, the pressure oil in cavity volume A and cavity volume C is respectively acting on first valve element or so
Both ends, the pressure oil of the oil duct Ls are connected after entering the first valve element with cavity volume B, and the pressure oil in cavity volume B acts on first
Valve element and the second valve element, the oil duct Ts are connected by the second valve element with cavity volume D, and the cavity volume A acts on the first valve element
When pressure acts on the pressure of the first valve element with the first spring pressure sum more than cavity volume B, cavity volume C, the movement of the first valve element makes oil
Road P is connected with oil duct T with pressure unloading oil.
In a preferred embodiment of the present invention, first valve element is provided with the first spring, and the cavity volume A acts on
When the pressure of one valve element is more than cavity volume B, cavity volume C pressure and the first spring the pressure sum for acting on the first valve element, valve
Core, which moves, causes oil duct P to be connected with oil duct T with pressure unloading oil.
In a preferred embodiment of the present invention, it is provided with second spring between second valve element and valve body, described second
Valve element is acted on movement so as to disconnect or connect valve pocket by the pressure differential of cavity volume B and second spring.
In a preferred embodiment of the present invention, the oil duct Ls into cavity volume B pressure oil pressure are less than second spring
Pressure, the second valve element are acted on by second spring and are connected with valve pocket, and now oil duct P pressure oil passes sequentially through the first valve element, cavity volume
C, it is connected after valve pocket and the second valve element with oil duct Ts, now cavity volume A acts on the pressure of the first valve element and is more than cavity volume B, cavity volume C
Pressure and the first spring the pressure sum for acting on the first valve element when, the first valve element, which moves, causes oil duct P and oil duct T to connect
Pass to pressure unloading oil.
In a preferred embodiment of the present invention, the oil duct Ls into cavity volume B pressure oil pressure are more than second spring
Pressure, the second valve element are promoted compression second spring to be connected to disconnect with valve pocket by cavity volume B pressure oil, and now cavity volume A is acted on
It is more than cavity volume B, cavity volume C pressure and the first spring the pressure sum for acting on the first valve element in the pressure of the first valve element
When, the first valve element, which moves, causes oil duct P to be connected with oil duct T with pressure unloading oil.
In a preferred embodiment of the present invention, magnetic valve is provided between the cavity volume C and oil duct Ts, the oil duct P leads to
Cross cavity volume C, magnetic valve is connected with oil duct Ts.
In a preferred embodiment of the present invention, the valve body is provided with the first screw plug and the second screw plug, first valve
Connection forms cavity volume A between core, valve body and the first screw plug, and cavity volume D is formed between the valve pocket, the second valve element and the second screw plug.
In a preferred embodiment of the present invention, first valve element is provided with the first oil hole, the second oil hole, the 3rd
Oil hole, the 4th oil hole, the 5th oil hole and the 6th oil hole, the oil duct P pass through the first oil hole and the second oil hole
It is connected with cavity volume A, is connected by the 3rd oil hole and the 4th oil hole with cavity volume C, the oil duct Ls passes through the 5th oil duct
Hole and the 6th oil hole are connected with cavity volume B.
In a preferred embodiment of the present invention, the valve pocket is provided with the 7th oil hole and the 8th oil hole, and described
Seven oil holes and the 8th oil hole are connected with the second valve element.
In a preferred embodiment of the present invention, second valve element is provided with the 9th oil hole, the tenth oil hole and the
11 oil holes, the oil duct Ts are connected by the 8th oil hole, the 11st oil hole and the tenth oil hole with cavity volume D, institute
The 9th oil hole and the 7th oil hole are stated by the effect of the second spool position in disconnection or the state that is connected, the 8th oil duct
The oil holes of Kong Yu 11 are connected.
The beneficial effects of the invention are as follows：Hydraulic unloading device of the present invention, pressure unloading can be controlled according to load pressure
Function, and in holding state, pressure unloading is lower, system power dissipation is further reduced.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, make required in being described below to embodiment
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those of ordinary skill in the art, on the premise of not paying creative work, it can also be obtained according to these accompanying drawings other
Accompanying drawing, wherein：
Fig. 1 is the structural representation of the preferred embodiment of hydraulic unloading device one of the present invention；
The mark of each part is as follows in accompanying drawing：1st, valve body, the 2, first valve element, the 3, first spring, 4, valve pocket, the 5, second valve
Core, 6, second spring, 7, magnetic valve, 8, cavity volume A, 9, cavity volume B, 10, cavity volume C, 11, cavity volume D, the 12, first screw plug, 13, second
Screw plug, 14, oil duct T, 15, oil duct P, 16, oil duct Ls, 17, oil duct Ts, the 21, first oil hole, the 22, second oil hole, 23,
Three oil holes, the 24, the 4th oil hole, the 25, the 5th oil hole, the 26, the 6th oil hole, the 41, the 7th oil hole, the 42, the 8th oil duct
Hole, the 51, the 9th oil hole, the 52, the tenth oil hole, the 53, the 11st oil hole.
Embodiment
The technical scheme in the embodiment of the present invention will be clearly and completely described below, it is clear that described implementation
Example is only the part of the embodiment of the present invention, rather than whole embodiments.It is common based on the embodiment in the present invention, this area
All other embodiment that technical staff is obtained under the premise of creative work is not made, belong to the model that the present invention protects
Enclose.
Referring to Fig. 1, a kind of hydraulic unloading device, including valve body 1 and it is sequentially connected and is located in first in valve body 1
Valve element 2, the valve element 5 of valve pocket 4 and second, the first valve element 2, the first plug 12 and valve body 1, which connect, forms cavity volume A 8, the first valve element 2,
Connection forms cavity volume B 9 between second valve element 5 and valve pocket 4, is connected between the first valve element 2, valve pocket 4 and valve body 1 and forms cavity volume C
10, connected between the second valve element 5, valve pocket and 4 second plugs 13 and form cavity volume D 11, valve body 1 is provided with the oil duct P for oil-feed
15 and oil duct Ls 7 and oil duct T 14 and oil duct Ts 17 for oil return, after oil duct P 15 pressure oil enters the first valve element 5
It is connected respectively with cavity volume A 8 and cavity volume C 10, the pressure oil in cavity volume A 8 and cavity volume C 10 is respectively acting on the first valve element 2
Left and right ends, oil duct Ls 17 pressure oil are connected after entering the first valve element 5 with cavity volume B 9, and the pressure oil in cavity volume B 9 is made
For the first valve element 2 and the second valve element 5, oil duct Ts 17 is connected by valve pocket 4, the second valve element 5 with cavity volume D11, and cavity volume A8 makees
When pressure for the first valve element 2 acts on the pressure sum of the first valve element 2 more than cavity volume B9 and cavity volume C10, the first valve element 2 moves
It is dynamic oil duct P12 is connected with oil duct T11 with pressure unloading oil.
In addition, the first valve element 2 is provided with the first spring 3, cavity volume A8 act on the first valve element 2 pressure be more than cavity volume B9,
When cavity volume C10 pressure and the pressure sum for acting on the first valve element 2 of the first spring 3, the first valve element 2, which moves, causes oil duct
P12 is connected with oil duct T11 with pressure unloading oil.
In addition, be provided with second spring 6 between the second valve element 5 and valve body 1, the second valve element 5 is by cavity volume B9 and second spring 6
Pressure differential acts on movement so as to disconnect or connect valve pocket 4.
In addition, oil duct Ls16 into cavity volume B9 pressure oil pressure are less than the pressure of second spring 6, the second valve element 5 is by second
The effect of spring 6 is connected with valve pocket 4, and now oil duct P15 pressure oil passes sequentially through the first valve element 2, cavity volume C10, valve pocket 4 and second
It is connected after valve element 5 with oil duct Ts17, now cavity volume A8 acts on the pressure of first valve element 2 and is more than cavity volume B 9, cavity volume C 10
When pressure and the pressure sum for acting on the first valve element of the first spring 3, the first valve element 2, which moves, causes oil duct P15 and oil duct
T14 connections are with pressure unloading oil.
In addition, oil duct Ls16 into cavity volume B9 pressure oil pressure are more than the pressure of second spring 6, the second valve element 5 is by cavity volume
B9 pressure oil promotes compression second spring 6, and to disconnect the connection with valve pocket 4, now cavity volume A8 acts on the pressure of the first valve element 2
When power is more than cavity volume B 9, cavity volume C 10 pressure and the first spring 3 the pressure sum for acting on the first valve element 2, the first valve
Core 2, which moves, causes oil duct P15 to be connected with oil duct T14 with pressure unloading oil.
In addition, being provided with magnetic valve 7 between cavity volume C10 and oil duct Ts17, oil duct P15 passes through cavity volume C10, magnetic valve 7 and oil
Road Ts17 is connected.
In addition, valve body 1 is provided with the first screw plug 12 and the second screw plug 13, the first valve element 2, the screw plug 12 of valve body 1 and first it
Between connection form cavity volume A 8, cavity volume D11 is formed between valve pocket 4, the second valve element 5 and the second screw plug 12.
In addition, the first valve element 2 is provided with the first oil hole 21, the second oil hole 22, the 3rd oil hole 23, the 4th oil hole
24th, the 5th oil hole 25 and the 6th oil hole 26, oil duct P15 pass through the first oil hole 21 and the second oil hole 22 and cavity volume A 8
It is connected, is connected by the 3rd oil hole 23 and the 4th oil hole 24 with cavity volume C10, oil duct Ls16 passes through the 5th oil hole 25
It is connected with the 6th oil hole 26 with cavity volume B9.
In addition, valve pocket 4 is provided with the 7th oil hole 41 and the 8th oil hole 42, the 7th oil hole 41 and the 8th oil hole 42
It is connected with the second valve element 5.
In addition, the second valve element 5 is provided with the 9th oil hole 51, the tenth oil hole 52 and the 11st oil hole 53, oil duct
Ts17 is connected by the tenth oil hole 52 and the 11st oil hole 53 with cavity volume D11, the 9th oil hole 51 and the 7th oil hole
41 are in disconnection or the state that is connected, the 8th oil hole 42 and the 11st oil hole 53 by the effect of the position of the second valve element 5
It is connected.
Hydraulic unloading device of the present invention has three kinds of working conditions, and concrete operating principle is as follows：
Working condition 1：Low-pressure load discharge under holding state：System in holding state, oil duct Ls16 enter the 5th oil hole 25,
6th oil hole 26 connects with cavity volume B9, and when cavity volume B9 pressure is less than the setting pressure of second spring 6, the second valve element 5 is the
It is pressed in the presence of two springs 6 on valve pocket 4；Now the pressure oils of oil duct P 15 are through the 3rd oil hole 21, the 4th oil hole 24, cavity volume
C10, the 7th oil hole 41, the 9th oil hole 51, the tenth oil hole 52, the 8th oil hole 52 connect with oil duct Ts17, i.e. cavity volume C10's
Pressure Pc is equal to oil duct Ts17 pressure,；Cavity volume A 8 pressure is equal to oil duct P15 pressure, i.e.,；Cavity volume B9 pressure
Equal to oil duct Ls pressure, i.e.,；When meeting conditionWhen, the first valve element
2 are moved to the left, and oil duct P15 is connected with oil duct T14, constant displacement pump off-load, pressure unloading。
Working condition 2：Overflow under working condition：Oil duct Ls16 is through the 5th oil hole 25, the 6th oil hole 26 and cavity volume B
9 connections, the pressure of cavity volume B 9；When cavity volume B9 pressure, which is more than second spring 6, sets pressure, the second valve element 5 is to the left
Mobile compression second spring 6, the final connection cut off between the 7th oil hole 41 and the 9th oil hole 51, now, oil duct P 15
Pressure is acted on cavity volume C 10 through the 3rd oil hole 23, the 4th oil hole 24, cavity volume C10 pressure；Cavity volume A8 pressure
Power is equal to oil duct P15 pressure, i.e.,；When meeting conditionWhen,
First valve element 2 is moved to the left, and oil duct P15 is connected with oil duct T14, constant displacement pump overflow, oil pressure relief。
Working condition 3：Force off-load：Cavity volume C 10 connects through magnetic valve 7 with oil duct Ts17, now operating mode and holding state
Under Low-pressure load discharge it is identical, pressure unloading is：。
It is different from prior art, hydraulic unloading device of the present invention, the function of pressure unloading can be controlled according to load pressure,
And system unloaded pressure is lower under holding state, system power dissipation is further reduced.
Embodiments of the invention are the foregoing is only, are not intended to limit the scope of the invention, it is every to utilize this hair
The equivalent structure or equivalent flow conversion that bright description is made, or directly or indirectly it is used in other related technology necks
Domain, it is included within the scope of the present invention.
Claims (9)
- A kind of 1. hydraulic unloading device, it is characterised in that including valve body and be sequentially connected and be located in valve body the first valve element, Valve pocket and the second valve element, first valve element connect to form cavity volume A with valve body, first valve element, the second valve element and valve pocket it Between connection form cavity volume B, between first valve element, valve pocket and valve body connection form cavity volume C, second valve element, valve pocket and Connection forms cavity volume D between plug, and the valve body is provided with oil duct P and oil duct Ls for oil-feed and the oil duct for oil return T and oil duct Ts, the oil duct P pressure oil are connected with cavity volume A and cavity volume C respectively after entering the first valve element, cavity volume A and cavity volume Pressure oil in C is respectively acting on the first valve element left and right ends, the pressure oil of the oil duct Ls enter after the first valve element with cavity volume B It is connected, the pressure oil in cavity volume B acts on the first valve element and the second valve element, and the oil duct Ts passes through the second valve element and cavity volume D It is connected, first valve element is provided with the first spring, and the pressure that the cavity volume A acts on the first valve element is more than cavity volume B, cavity volume When C pressure and the pressure sum for acting on the first valve element of the first spring, valve element, which moves, causes oil duct P to be connected with oil duct T With pressure unloading oil.
- 2. hydraulic unloading device according to claim 1, it is characterised in that the is provided between second valve element and valve body Two springs, second valve element are acted on movement so as to disconnect or connect valve pocket by the pressure differential of cavity volume B and second spring.
- 3. hydraulic unloading device according to claim 2, it is characterised in that the oil duct Ls enters cavity volume B pressure oil Pressure is less than second spring pressure, and the second valve element is acted on by second spring and is connected with valve pocket, and now oil duct P pressure oil leads to successively It is connected after crossing the first valve element, cavity volume C, valve pocket and the second valve element with oil duct Ts, now cavity volume A acts on the pressure of the first valve element More than cavity volume B, cavity volume C pressure and the first spring the pressure sum for acting on the first valve element when, the first valve element movement make Oil duct P is obtained to connect with oil duct T with pressure unloading oil.
- 4. hydraulic unloading device according to claim 2, it is characterised in that the oil duct Ls enters cavity volume B pressure oil Pressure is more than second spring pressure, and the second valve element is promoted compression second spring to disconnect the company with valve pocket by cavity volume B pressure oil Connect, now cavity volume A act on the first valve element pressure be more than cavity volume B, cavity volume C pressure and the first spring act on first During the pressure sum of valve element, the first valve element, which moves, causes oil duct P to be connected with oil duct T with pressure unloading oil.
- 5. hydraulic unloading device according to claim 2, it is characterised in that electricity is provided between the cavity volume C and oil duct Ts Magnet valve, the oil duct P are connected by cavity volume C, magnetic valve with oil duct Ts.
- 6. according to any described hydraulic unloading devices of claim 1-5, it is characterised in that the valve body is provided with the first screw plug With the second screw plug, between first valve element, valve body and the first screw plug connection form cavity volume A, the valve pocket, the second valve element and the Cavity volume D is formed between two screw plugs.
- 7. hydraulic unloading device according to claim 6, it is characterised in that first valve element is provided with the first oil duct Hole, the second oil hole, the 3rd oil hole, the 4th oil hole, the 5th oil hole and the 6th oil hole, the oil duct P pass through first Oil hole and the second oil hole are connected with cavity volume A, are connected by the 3rd oil hole and the 4th oil hole with cavity volume C, described Oil duct Ls is connected by the 5th oil hole and the 6th oil hole with cavity volume B.
- 8. hydraulic unloading device according to claim 7, it is characterised in that the valve pocket is provided with the 7th oil hole and the Eight oil holes, the 7th oil hole and the 8th oil hole are connected with the second valve element.
- 9. hydraulic unloading device according to claim 8, it is characterised in that second valve element is provided with the 9th oil duct Hole, the tenth oil hole and the 11st oil hole, the oil duct Ts pass through the 8th oil hole, the 11st oil hole and the tenth oil hole It is connected with cavity volume D, the 9th oil hole is in disconnection or the shape that connects with the 7th oil hole by the effect of the second spool position State, the 8th oil hole are connected with the 11st oil hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610561826.4A CN106015144B (en) | 2016-07-18 | 2016-07-18 | Hydraulic unloading device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610561826.4A CN106015144B (en) | 2016-07-18 | 2016-07-18 | Hydraulic unloading device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106015144A CN106015144A (en) | 2016-10-12 |
| CN106015144B true CN106015144B (en) | 2018-01-23 |
Family
ID=57119456
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610561826.4A Active CN106015144B (en) | 2016-07-18 | 2016-07-18 | Hydraulic unloading device |
Country Status (1)
| Country | Link |
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| CN (1) | CN106015144B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3777773A (en) * | 1972-02-22 | 1973-12-11 | Koehring Co | Pressure compensating valve mechanism |
| CN201190809Y (en) * | 2008-05-22 | 2009-02-04 | 郑州长通机电设备有限公司 | Two-position three-way unloading valve |
| CN103062148B (en) * | 2013-01-30 | 2015-09-16 | 浙江海克力液压有限公司 | A kind of energy-saving priority unloading valve |
| CN105114665A (en) * | 2015-08-31 | 2015-12-02 | 苏州萨伯工业设计有限公司 | Flow and pressure control valve |
| CN205349897U (en) * | 2016-01-22 | 2016-06-29 | 嘉善志达机电有限公司 | Automatic oil discharge device of dominant discharge |
| CN206092555U (en) * | 2016-07-18 | 2017-04-12 | 江苏恒立液压科技有限公司 | Hydraulic pressure unloading device |
-
2016
- 2016-07-18 CN CN201610561826.4A patent/CN106015144B/en active Active
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| CN106015144A (en) | 2016-10-12 |
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