CN107725517A - A kind of proportional flow magnetic valve - Google Patents
A kind of proportional flow magnetic valve Download PDFInfo
- Publication number
- CN107725517A CN107725517A CN201710916072.4A CN201710916072A CN107725517A CN 107725517 A CN107725517 A CN 107725517A CN 201710916072 A CN201710916072 A CN 201710916072A CN 107725517 A CN107725517 A CN 107725517A
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- Prior art keywords
- valve element
- control valve
- pressure
- pressure control
- flow control
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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
-
- 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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0603—Multiple-way valves
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
The invention discloses a kind of proportional flow magnetic valve, including proportion electro-magnet, pressure control valve element, flow control valve element, valve pocket, flow control spring and plug.The electromagnetic force of the magnetic valve does not control flow directly, but for controlling the hydraulic pressure of a pressure chamber inside magnetic valve, by the position of hydraulic coupling in the cavity volume and the balance control valve core of spring force so as to adjusting the size of throttle orifice to control the size of flow.
Description
Technical field
The present invention relates to a kind of proportional flow magnetic valve.Suitable for hydraulic-driven field.
Background technology
Current solenoid-operated proportional flow control valve comes generally by the electromagnetic force of proportion electro-magnet and the balance of spring force
The position of valve element is controlled so as to adjusting the size of throttle orifice to control the size of flow, the electromagnetic force air gap curve of proportion electro-magnet
Only the part of relative level can meet the control requirement of proportion magnetic valve, and the part of relative level only has very short air gap area
Between so that the spool stroke of this valve is shorter, control accuracy can not meet the requirement of big flow than relatively low.
The content of the invention
It is an object of the invention to provide a kind of proportional flow magnetic valve, the not direct controlling stream of electromagnetic force of the magnetic valve
Amount, but for controlling the hydraulic pressure of a pressure chamber inside magnetic valve, pass through the flat of hydraulic coupling in the cavity volume and spring force
The position of weighing apparatus control valve element is so as to adjusting the size of throttle orifice to control the size of flow.
In order to realize above-mentioned technical purpose, the present invention adopts the following technical scheme that：
A kind of proportional flow magnetic valve, including proportion electro-magnet, pressure control valve element, flow control valve element, valve pocket, flow control spring and plug,
Described valve pocket one end is connected on proportion electro-magnet, has the spool bore of a tubular structure in valve pocket, in spool bore axially according to
Secondary setting pressure control valve element and flow control valve element, one end of the pressure control valve element are connected with proportion electro-magnet, and the other end passes through a pressure
Feedback cavity is connected with flow control valve element；
Axially it has been sequentially arranged along spool bore on valve pocket：The oil return opening communicated with drainback passage, the pressure control mouth communicated with hydraulic power source,
Flow control mouth, and with loading the load port communicated；
The pressure control valve element has at least two major diameter valve element sections coordinated with the closing of spool bore inwall and positioned at two big
At least one minor diameter valve element section between diameter valve element section, pressure is formed between the minor diameter valve element section and spool bore inwall
Control chamber, the pressure control cavity are connected by communicating passage with the pressure feedback chamber；
The valve pocket other end connects plug, and the flow control spring is connected between plug and flow control valve element.
The pressure control valve element includes the first pressure control valve element section, the second pressure control valve element section, the 3rd pressure control valve element section and the 4th valve
Core section, wherein, the second pressure control valve element section diameter and the 4th pressure control valve element section diameter are identical, and the second pressure control valve element section and the 4th
The periphery of pressure control valve element section and the inner headed face of spool bore cooperatively form band；The diameter of 3rd pressure control valve element section is less than second
Pressure control valve element section and the 4th pressure control valve element section, between the periphery of the 3rd pressure control valve element section and the Inner discs of spool bore described in formation
Pressure control cavity；
Flow control valve element includes the first flow control valve element section, the second flow control valve element section, the 3rd flow control valve element section and the 4th flow control valve element section,
Wherein, the second flow control valve element section diameter and the 4th flow control valve element section diameter are identical, and the second flow control valve element section and the 4th flow control
The periphery of valve element section and the inner headed face of spool bore cooperatively form band；The diameter of 3rd flow control valve element section is less than the second flow control
Valve element section and the 4th flow control valve element section, one is formed between the periphery of the 3rd flow control valve element section and the Inner discs of spool bore by institute
State the flow control chamber that flow control mouth connects with load port；
The end of the 4th pressure control valve element section on pressure control valve element is machined with axis hole, and the first flow control valve element section in flow control valve element section is inserted
The wall for entering the axis hole and the axis hole forms the pressure feedback chamber, and the first connection is radially machined with pressure control valve element
Hole, close to the end face of axis hole along pressure control poppet shaft to being machined with the second intercommunicating pore, two intercommunicating pores communicate that to form the connection logical
Road.
Pressure-controling spring is connected in the first pressure control valve element section, pressure control valve element and ratio electromagnetism under the elastic force of pressure-controling spring
Connection is contradicted between armature in iron.
Part in the 4th flow control valve element section close to plug is machined with a positive stop lug boss, and the positive stop lug boss is used to protect
First flow control valve element section described in when demonstrate,proving work does not contact with the bottom of pressure feedback chamber.
Pressure control mouth P1 and flow control the mouth P2 directly communicates or connected different hydraulic power sources outside magnetic valve.
A kind of method of work based on the proportional flow magnetic valve is big on pressure control valve element when magnetic valve no power
Diameter valve element section closes the passage between pressure control mouth and pressure control cavity, and the passage between oil return opening and pressure control cavity is beaten
Open, it is zero that the hydraulic oil in pressure control cavity and pressure feedback chamber flows out hydraulic pressure by oil return opening, and flow control valve element is in flow control spring
Active force under passage between load port and flow control mouth is reached maximum, now the output flow of magnetic valve is maximum；
When magnetic valve inputs certain electric current, electromagnetic force promotes pressure control valve element to be moved to X-direction and opens pressure control mouth and pressure control cavity
Between passage, hydraulic oil enters pressure control cavity and pressure feedback chamber；
When hydraulic pressure rises to when making a concerted effort to be more than electromagnetic force of the hydraulic coupling acted on pressure control valve element and pressure-controling spring, pressure control valve element to
The passage that Y-direction motion is closed between pressure control mouth and pressure control cavity, the passage opened between oil return opening and pressure control cavity make
Hydraulic pressure declines；
When hydraulic coupling, pressure-controling spring spring force, electromagnetic force three balance, pressure valve core is stable attached in fixed operating point location
Closely, the passage between pressure control cavity and oil return opening and pressure control mouth is turned off, and hydraulic pressure no longer changes, and hydraulic coupling is total to flow control spring
Same-action controls flow control valve element, and flow control valve element can be stablized under fixed action of hydraulic force drives in fixed position, control magnetic valve
The size energy linear regulation pressure control cavity of streaming current and the hydraulic pressure size of pressure feedback intracavitary, so as to linear regulation flow control valve
The position of core, the position of flow control valve element can control the channel sized of flow control mouth and load port so as to control the size of flow.
The beneficial effects of the invention are as follows：
A kind of proportional flow magnetic valve of the present invention, the pressure for being machined with pressure control cavity and communicating therewith inside the magnetic valve
Feedback cavity, the hydraulic oil of the pressure feedback intracavitary pressure control valve element and flow control valve element can be produced a pair it is equal in magnitude in opposite direction
Hydraulic coupling, hydraulic coupling size is directly proportional to the hydraulic pressure of pressure feedback intracavitary.
Control pressure control cavity described in the size energy linear regulation of the electromagnetic valve driving current and the pressure feedback chamber
Interior hydraulic pressure size, so as to the position of the linear regulation flow control valve element, the position of flow control valve element can control hydraulic oil to flow into
The channel sized of load is so as to controlling the size of flow.
Pressure control valve element operate mainly in operating point nearby, it is necessary to impulse stroke it is smaller, the characteristic energy of proportion electro-magnet
Meet its job requirement well, the motion of flow control valve element is not influenceed by electromagnet, it is possible to achieve larger impulse stroke, is carried
High flow capacity control accuracy, meet big flow requirement.
Brief description of the drawings
Fig. 1 is the structural representation of proportional flow magnetic valve of the present invention；
Fig. 2 is the structural representation of pressure control valve element of the present invention；
Fig. 3 is the structural representation of flow control valve element of the present invention.
Wherein, 1, proportion electro-magnet；2nd, connector；3rd, armature set；4th, shell；5th, coil rack；6th, coil；7th, quiet iron
Core；8th, flange；9th, pressure control valve element；10th, communicating passage；11st, valve pocket；12nd, flow control valve element；13rd, flow control spring；14th, plug；15、
Top cover；16th, armature；17th, jump ring；18th, banking stop；19th, pressure-controling spring；21st, pressure control cavity；23rd, pressure feedback chamber, T, oil return
Mouthful；P1, pressure control mouth；P2, flow control mouth；A, load port；9-1, the first pressure control valve element section；9-2, the second pressure control valve element section；9-3,
Three pressure control valve element sections；9-4, the 4th pressure control valve element section；12-1, the first flow control valve element section；12-2, the second flow control valve element section；12-3、
3rd flow control valve element section；12-4, the 4th flow control valve element section.
Embodiment
Make further details of theory to technical scheme with reference to Figure of description and specific embodiment
It is bright.
As shown in figure 1, a kind of proportional flow magnetic valve, including proportion electro-magnet 1, pressure control valve element 9, flow control valve element 12, valve
Set 11, flow control spring 13 and plug 14, one end of the valve pocket 11 are connected with proportion electro-magnet 1, and the other end of valve pocket 11 is fixed
Connect the plug 14；There is the spool bore of a tubular structure, valve element in valve pocket 11 between proportion electro-magnet and plug
Hole axle is to setting gradually pressure control valve element 9, flow control valve element 12 and flow control spring 13, and pressure control valve element 9, flow control valve element 12 can be along
Spool bore slides axially,
Axially it has been sequentially arranged along spool bore on valve pocket 11：The oil return inlet T communicated with drainback passage, the pressure control communicated with hydraulic power source
Mouth P1, flow control mouth P2, and with loading the load port A communicated；
The pressure control valve element includes the first pressure control valve element section, the second pressure control valve element section, the 3rd pressure control valve element section and the 4th valve element section,
Wherein, the second pressure control valve element section diameter and the 4th pressure control valve element section diameter are identical, and the second pressure control valve element section and the 4th pressure control
The periphery of valve element section and the inner headed face of spool bore cooperatively form band；The diameter of 3rd pressure control valve element section is less than the second pressure control
Valve element section and the 4th pressure control valve element section, the pressure is formed between the periphery of the 3rd pressure control valve element section and the Inner discs of spool bore
Control chamber；
Flow control valve element includes the first flow control valve element section, the second flow control valve element section, the 3rd flow control valve element section and the 4th flow control valve element section,
Wherein, the second flow control valve element section diameter and the 4th flow control valve element section diameter are identical, and the second flow control valve element section and the 4th flow control
The periphery of valve element section and the inner headed face of spool bore cooperatively form band；The diameter of 3rd flow control valve element section is less than the second flow control
Valve element section and the 4th flow control valve element section, one is formed between the periphery of the 3rd flow control valve element section and the Inner discs of spool bore by institute
State the flow control chamber that flow control mouth connects with load port；
The end of the 4th pressure control valve element section on pressure control valve element is machined with axis hole, and the first flow control valve element section in flow control valve element section is inserted
The wall for entering the axis hole and the axis hole forms the pressure feedback chamber, and the first connection is radially machined with pressure control valve element
Hole, close to the end face of axis hole along pressure control poppet shaft to being machined with the second intercommunicating pore, two intercommunicating pores communicate that to form the connection logical
Road.
One end of the pressure control valve element is contradicted by the armature in flow control spring and the proportion electro-magnet and connected.Pressure control bullet
The rigidity and pretightning force of spring 19 are all smaller, mainly play return.
The flow control valve element is machined with a positive stop lug boss close to the end of plug, ensures flow control valve element during work
Another side end face not with the pressure control valve element end contact.
Pressure control mouth P1 and flow control the mouth P2 directly communicates or connect different hydraulic power sources outside magnetic valve.
There are two sections of hermetic units the outer surface of pressure control valve element 9, coordinates control oil return inlet T, pressure control mouth with valve pocket inner surface respectively
The size of passage between P1 and pressure control cavity 21；There are two sections of hermetic units, one-stage control load port A in the outer surface of flow control valve element 12
The size of passage between flow control mouth P2, one section prevents hydraulic oil from axially being flowed out along valve pocket 11.
Magnetic valve shown in Fig. 1 is open type, and when magnetic valve no power, pressure control valve element 9 withstands on work by pressure-controling spring 19
The high order end of stroke, the passage between pressure control mouth P1 and pressure control cavity 21 is closed, between oil return inlet T and pressure control cavity 21
Passage is opened, and it is zero that the hydraulic oil in pressure control cavity 21 and pressure feedback chamber 23 flows out hydraulic pressure by oil return inlet T, flow control valve element
12 controlled flow springs 13 withstand on the high order end of impulse stroke, and passage reaches maximum between load port A and flow control mouth P2, now electromagnetism
The output flow of valve is maximum.The rigidity and pretightning force of pressure-controling spring 19 are all smaller, mainly play return.
When magnetic valve inputs certain electric current, electromagnetic force promotes pressure control valve element 9 to move right and opens pressure control mouth P1 and pressure control
Passage between chamber 21 processed, hydraulic oil enter pressure control cavity 21 and pressure feedback chamber 23；Pressure valve is acted on when hydraulic pressure rises to
For hydraulic coupling on core 9 with the spring force of pressure-controling spring 19 when making a concerted effort to be more than electromagnetic force, pressure control valve element 9 closes pressure control mouth to left movement
Passage between P1 and pressure control cavity 21, the passage opened between oil return inlet T and pressure control cavity 21 decline hydraulic pressure；Hydraulic pressure
Pressure valve core 9 is stable near fixed operating point location when power, the spring force of pressure-controling spring 19, electromagnetic force three balance, pressure
Passage between control chamber 21 and oil return inlet T and pressure control mouth P1 is turned off, and hydraulic pressure no longer changes, hydraulic coupling and the bullet of flow control spring 13
Spring force collective effect control flow control valve element 12, flow control valve element 12 can be stablized in fixed position, control under fixed action of hydraulic force
Hydraulic pressure size in the size energy linear regulation pressure control cavity 21 and pressure feedback chamber 23 of electromagnetic valve driving current processed, so as to line
Property regulation flow control valve element 12 position, the position of flow control valve element 12 can control flow control mouth P2 and load port A channel sized from
And control the size of flow.Pressure control valve element 9 operate mainly in operating point nearby, it is necessary to impulse stroke it is smaller, ratio electromagnetism
The characteristic of iron 1 is well positioned to meet its job requirement, and the motion of flow control valve element 12 is not influenceed by electromagnet 1, it is possible to achieve compared with
Big impulse stroke, improve flow control accuracy, meet big flow requirement.
Although the preferred embodiments of the present invention described in detail above, it is to be clearly understood that for this area
Technical staff for, the present invention can have various modifications and variations.That is made within the spirit and principles of the invention appoints
What modification, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (6)
1. a kind of proportional flow magnetic valve, it is characterised in that including proportion electro-magnet, pressure control valve element, flow control valve element, valve pocket, control
Stray bullet spring and plug, described valve pocket one end are connected on proportion electro-magnet, have the spool bore of a tubular structure, valve in valve pocket
Pressure control valve element and flow control valve element are axially set gradually in core bore, one end of the pressure control valve element is connected with proportion electro-magnet, another
End is connected by a pressure feedback chamber and flow control valve element；
Axially it has been sequentially arranged along spool bore on valve pocket：The oil return opening communicated with drainback passage, the pressure control mouth communicated with hydraulic power source,
Flow control mouth, and with loading the load port communicated；
The pressure control valve element has at least two major diameter valve element sections coordinated with the closing of spool bore inwall and positioned at two big
At least one minor diameter valve element section between diameter valve element section, pressure is formed between the minor diameter valve element section and spool bore inwall
Control chamber, the pressure control cavity are connected by communicating passage with the pressure feedback chamber；
The valve pocket other end connects plug, and the flow control spring is connected between plug and flow control valve element.
2. proportional flow magnetic valve according to claim 1, it is characterised in that the pressure control valve element includes the first pressure valve
Core section, the second pressure control valve element section, the 3rd pressure control valve element section and the 4th valve element section, wherein, the second pressure control valve element section diameter and the 4th
Pressure control valve element section diameter is identical, and the inner headed face of the periphery and spool bore of the second pressure control valve element section and the 4th pressure control valve element section
Cooperatively form band；The diameter of 3rd pressure control valve element section is less than the second pressure control valve element section and the 4th pressure control valve element section, the 3rd control
The pressure control cavity is formed between the periphery of pressure valve core section and the Inner discs of spool bore；
Flow control valve element includes the first flow control valve element section, the second flow control valve element section, the 3rd flow control valve element section and the 4th flow control valve element section,
Wherein, the second flow control valve element section diameter and the 4th flow control valve element section diameter are identical, and the second flow control valve element section and the 4th flow control
The periphery of valve element section and the inner headed face of spool bore cooperatively form band；The diameter of 3rd flow control valve element section is less than the second flow control
Valve element section and the 4th flow control valve element section, one is formed between the periphery of the 3rd flow control valve element section and the Inner discs of spool bore by institute
State the flow control chamber that flow control mouth connects with load port；
The end of the 4th pressure control valve element section on pressure control valve element is machined with axis hole, and the first flow control valve element section in flow control valve element section is inserted
The wall for entering the axis hole and the axis hole forms the pressure feedback chamber, and the first connection is radially machined with pressure control valve element
Hole, close to the end face of axis hole along pressure control poppet shaft to being machined with the second intercommunicating pore, two intercommunicating pores communicate that to form the connection logical
Road.
3. proportional flow magnetic valve according to claim 2, it is characterised in that control is connected in the first pressure control valve element section
Pressing spring, connection is contradicted between the armature under the elastic force of pressure-controling spring in pressure control valve element and proportion electro-magnet.
4. proportional flow magnetic valve according to claim 2, it is characterised in that close to stifled in the 4th flow control valve element section
The part of head is machined with a positive stop lug boss, and the first flow control valve element section and pressure are anti-described in when the positive stop lug boss is for ensureing work
The bottom of feedback chamber does not contact.
5. proportional flow magnetic valve according to claim 1, it is characterised in that pressure control mouth P1 and flow control the mouth P2 is in electricity
Different hydraulic power sources is directly communicated or connects outside magnet valve.
A kind of 6. method of work based on proportional flow magnetic valve described in claim 1, it is characterised in that：When magnetic valve no power
When, the major diameter valve element section on pressure control valve element closes the passage between pressure control mouth and pressure control cavity, oil return opening and pressure control
Passage between chamber processed is opened, and it is zero that the hydraulic oil in pressure control cavity and pressure feedback chamber flows out hydraulic pressure by oil return opening, control
Flow valve core makes passage between load port and flow control mouth reach maximum under the active force of flow control spring, now the output stream of magnetic valve
Amount is maximum；
When magnetic valve inputs certain electric current, electromagnetic force promotes pressure control valve element to be moved to X-direction and opens pressure control mouth and pressure control cavity
Between passage, hydraulic oil enters pressure control cavity and pressure feedback chamber；
When hydraulic pressure rises to when making a concerted effort to be more than electromagnetic force of the hydraulic coupling acted on pressure control valve element and pressure-controling spring, pressure control valve element to
The passage that Y-direction motion is closed between pressure control mouth and pressure control cavity, the passage opened between oil return opening and pressure control cavity make
Hydraulic pressure declines；
When hydraulic coupling, pressure-controling spring spring force, electromagnetic force three balance, pressure valve core is stable attached in fixed operating point location
Closely, the passage between pressure control cavity and oil return opening and pressure control mouth is turned off, and hydraulic pressure no longer changes, and hydraulic coupling is total to flow control spring
Same-action controls flow control valve element, and flow control valve element can be stablized under fixed action of hydraulic force drives in fixed position, control magnetic valve
The size energy linear regulation pressure control cavity of streaming current and the hydraulic pressure size of pressure feedback intracavitary, so as to linear regulation flow control valve
The position of core, the position of flow control valve element can control the channel sized of flow control mouth and load port so as to control the size of flow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710916072.4A CN107725517B (en) | 2017-09-30 | 2017-09-30 | Proportional flow solenoid valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710916072.4A CN107725517B (en) | 2017-09-30 | 2017-09-30 | Proportional flow solenoid valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107725517A true CN107725517A (en) | 2018-02-23 |
| CN107725517B CN107725517B (en) | 2019-12-27 |
Family
ID=61208409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710916072.4A Active CN107725517B (en) | 2017-09-30 | 2017-09-30 | Proportional flow solenoid valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107725517B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108425906A (en) * | 2018-06-14 | 2018-08-21 | 东莞海特帕沃液压科技有限公司 | Hydraulic control proportional flow control valve |
| CN111306333A (en) * | 2020-03-01 | 2020-06-19 | 东莞海特帕沃液压科技有限公司 | Safety valve |
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| JPH11218239A (en) * | 1998-02-02 | 1999-08-10 | Kenji Masuda | Proportional solenoid type direction throttle valve |
| US20010009164A1 (en) * | 2000-01-26 | 2001-07-26 | Atsushi Motoki | Electromagnetic valve |
| US20010025662A1 (en) * | 2000-03-30 | 2001-10-04 | Maki Kawamura | Pressure regulation valve |
| CN1603635A (en) * | 2004-11-05 | 2005-04-06 | 宁波华液机器制造有限公司 | Proportional differential pressure control valve |
| CN1959166A (en) * | 2006-11-08 | 2007-05-09 | 宁波华液机器制造有限公司 | Direct action type proportional pressure-reducing valve |
| CN202510814U (en) * | 2012-01-12 | 2012-10-31 | 上海昀锋液压有限公司 | Stacked proportional electromagnetic flow valve |
| CN103370565A (en) * | 2011-02-28 | 2013-10-23 | 博格华纳公司 | Two-stage variable force solenoid |
| CN103857925A (en) * | 2011-03-22 | 2014-06-11 | 派克汉尼芬公司 | Electro-proportional pilot operated poppet valve with pressure compensation |
| CN107023669A (en) * | 2016-12-12 | 2017-08-08 | 中国第汽车股份有限公司 | A kind of ratio pressure magnetic valve |
-
2017
- 2017-09-30 CN CN201710916072.4A patent/CN107725517B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11218239A (en) * | 1998-02-02 | 1999-08-10 | Kenji Masuda | Proportional solenoid type direction throttle valve |
| US20010009164A1 (en) * | 2000-01-26 | 2001-07-26 | Atsushi Motoki | Electromagnetic valve |
| US20010025662A1 (en) * | 2000-03-30 | 2001-10-04 | Maki Kawamura | Pressure regulation valve |
| CN1603635A (en) * | 2004-11-05 | 2005-04-06 | 宁波华液机器制造有限公司 | Proportional differential pressure control valve |
| CN1959166A (en) * | 2006-11-08 | 2007-05-09 | 宁波华液机器制造有限公司 | Direct action type proportional pressure-reducing valve |
| CN103370565A (en) * | 2011-02-28 | 2013-10-23 | 博格华纳公司 | Two-stage variable force solenoid |
| CN103857925A (en) * | 2011-03-22 | 2014-06-11 | 派克汉尼芬公司 | Electro-proportional pilot operated poppet valve with pressure compensation |
| CN202510814U (en) * | 2012-01-12 | 2012-10-31 | 上海昀锋液压有限公司 | Stacked proportional electromagnetic flow valve |
| CN107023669A (en) * | 2016-12-12 | 2017-08-08 | 中国第汽车股份有限公司 | A kind of ratio pressure magnetic valve |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108425906A (en) * | 2018-06-14 | 2018-08-21 | 东莞海特帕沃液压科技有限公司 | Hydraulic control proportional flow control valve |
| CN111306333A (en) * | 2020-03-01 | 2020-06-19 | 东莞海特帕沃液压科技有限公司 | Safety valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107725517B (en) | 2019-12-27 |
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