CN103615581A - Overload protective valve of hydraulic actuator - Google Patents
Overload protective valve of hydraulic actuator Download PDFInfo
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- CN103615581A CN103615581A CN201310652130.9A CN201310652130A CN103615581A CN 103615581 A CN103615581 A CN 103615581A CN 201310652130 A CN201310652130 A CN 201310652130A CN 103615581 A CN103615581 A CN 103615581A
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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
- 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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- 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
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Safety Valves (AREA)
Abstract
The invention belongs to the design technology of hydraulic actuators, and relates to the improvement of an overload protective valve of a hydraulic actuator. The overload protective valve comprises a shell (1), a spring (2), a first spring base (3), a second spring base (4), a second sealing ring (7), a clamping ring (8) and a first sealing ring (9). The overload protective valve of the hydraulic actuator is characterized by being provided with a valve mechanism composed of a valve (5) and a valve base (6). The overload protective valve of the hydraulic actuator is good in sealing performance and not prone to clamping, and ensures the sealing effect of the valve mechanism, the service life of the hydraulic actuator is prolonged, and the working reliability is improved.
Description
Technical field
The invention belongs to hydraulic actuator structure-design technique, relate to the improvement to hydraulic actuator overload protection valve.
Background technique
The structure of current a kind of hydraulic actuator overload protection valve is referring to Fig. 1.It is comprised of housing 1, spring 2, the first spring seat 3, the second spring seat 4, the second seal ring 7, collar 8, the first seal ring 9, steel ball seat 10 and steel ball 11.Housing 1 is a left end sealing, the unlimited cylinder of right-hand member, and the external cylindrical surface of housing 1 is divided into four sections, and left section is outer six side's sections, and second segment is external thread section from left to right, and the 3rd section is primary optic axis section from left to right, and right section is the second optical axis section.The core diameter of thread of external thread section is greater than the external diameter of primary optic axis section, and the external diameter of primary optic axis section is greater than the external diameter of the second optical axis section.On the external cylindrical surface of primary optic axis section, have primary optic axis section seal groove, the first seal ring 9 is arranged in primary optic axis section seal groove.The endoporus of housing 1 is step hole, the left sector hole footpath of this step hole is less than right sector hole footpath, the position of the position of the right sector hole of this step hole and the second optical axis section is corresponding, on the inwall of the right sector hole of housing 1 step hole, there is housing collar half mounting groove that a cross section is semicircular annular, on the external cylindrical surface of housing 1 second optical axis section, there is a collar mounting hole 1a, this collar mounting hole 1a and the two-way tangential perforation of housing collar half mounting groove.Spring 2 is positioned at the left sector hole of housing 1 step hole, and the first spring seat 3 is positioned at the right-hand member of spring 2, and the second spring seat 4 is positioned at the left end of spring 2.By steel ball 11 and steel ball seat 10, form valve mechanism.Steel ball seat 10 has Step Shaft profile, steel ball seat 10 left end optical axis axial lengths equal the length of the right sector hole of housing 1 step hole, the left end optical axis of steel ball seat 10 is positioned at the right sector hole of housing 1 step hole and keeps Spielpassung, on the external cylindrical surface of left end optical axis, there is valve base collar half mounting groove that a cross section is semicircular annular, the sectional dimension of the sectional dimension of steel ball seat collar half mounting groove and housing collar half mounting groove is identical and position is corresponding, steel ball seat collar half mounting groove and housing collar half mounting groove are combined to form complete collar mounting groove, collar 8 is arranged in collar mounting groove housing 1 and steel ball seat 10 is connected to integral body.On the external cylindrical surface of steel ball seat 10 the right optical axises, have the second seal ring mounting groove, the second seal ring 7 is arranged in the second seal ring mounting groove.Between the left and right end face of steel ball seat 10, there is a through hole 10b, on the external cylindrical surface of steel ball seat 10 left end optical axises, the right of collar half mounting groove is, there is a spill port 10a who radially connects on the left side of the second seal ring mounting groove.Steel ball 11 is between the right side of the first spring seat 3 and the left port of the through hole 10b in steel ball seat 10, at the center of the first spring seat 3 right sides, there is a ball-and-socket, this ball-and-socket withstands steel ball 11, make steel ball fit tightly the 10b left end aperture, through hole in steel ball seat 10, spill port 10a is sealed.When the pressure of hydraulic actuator inner chamber is not more than safety pressure, steel ball 11 seals spill port 10a; When the pressure of hydraulic actuator inner chamber is greater than safety pressure, hydraulic coupling is backed down steel ball 11, and spill port 10a is communicated with the inner chamber of hydraulic actuator.Its working principle is: hydraulic actuator overload protection valve is arranged in the mounting hole on actuator housing, and this mounting hole is three sections of step holes, and this step hole is communicated with actuator inner chamber.One section of step hole outermost is internal thread, is combined overload protection valve and actuator housing are connected as a single entity with overload protection valve chest 1 outside thread.In the middle of step hole, one section is unthreaded hole, with overload protection valve first paragraph optical axis section Spielpassung, by the first seal ring 9 sealings, prevents that actuator housing inner fluid from leaking.Inside step Kongzui, one section is unthreaded hole, with the second optical axis section Spielpassung of overload protection valve chest 1, by the second seal ring 7 sealings, spill port 10a and actuator inner chamber is separated.On the inwall of one section of step Kongzui the inside, there is an annular groove; this annular groove is corresponding with the position of overload protection valve spill port 10a; in actuator enclosure interior, have oil circuit, the inner of this oil circuit and annular groove are communicated with, and the outer end of this oil circuit and actuator oil return system are communicated with.When the pressure of hydraulic actuator inner chamber is not more than safety pressure, steel ball 11 seals spill port 10a; When the pressure of hydraulic actuator inner chamber is greater than safety pressure, hydraulic coupling is backed down steel ball 11, and pressure oil is got back to actuator oil return system through the oil circuit of spill port 10a and actuator enclosure interior.Its shortcoming is: poor sealing performance, the easy clamping stagnation of steel ball, causes the seal failure of valve mechanism, makes hydraulic actuator shortening in working life, the poor reliability of work.
Summary of the invention
The object of the invention is: propose a kind of good seal performance, be not easy the hydraulic actuator overload protection valve of clamping stagnation, to guarantee the sealing effect of valve mechanism, extend actuator working life, improve the reliability of work.
Technological scheme of the present invention is: a kind of hydraulic actuator overload protection valve, comprises housing 1, spring 2, the first spring seat 3, the second spring seat 4, the second seal ring 7, collar 8 and the first seal ring 9, housing 1 is a left end sealing, the cylinder that right-hand member is unlimited, the external cylindrical surface of housing 1 is divided into four sections, left section is outer six side's sections, second segment is external thread section from left to right, the 3rd section is primary optic axis section from left to right, right section is the second optical axis section, the core diameter of thread of external thread section is greater than the external diameter of primary optic axis section, the external diameter of primary optic axis section is greater than the external diameter of the second optical axis section, on the external cylindrical surface of primary optic axis section, there is primary optic axis section seal groove, the first seal ring 9 is arranged in primary optic axis section seal groove, the endoporus of housing 1 is step hole, the left sector hole footpath of this step hole is less than right sector hole footpath, the position of the position of the right sector hole of this step hole and the second optical axis section is corresponding, on the inwall of the right sector hole of housing 1 step hole, there is housing collar half mounting groove that a cross section is semicircular annular, on the external cylindrical surface of housing 1 second optical axis section, there is a collar mounting hole 1a, this collar mounting hole 1a and the two-way tangential perforation of housing collar half mounting groove, spring 2 is positioned at the left sector hole of housing 1 step hole, and the first spring seat 3 is positioned at the right-hand member of spring 2, and the second spring seat 4 is positioned at the left end of spring 2, it is characterized in that: by a valve mechanism being formed by valve 5 and valve base 6, valve base 6 has Step Shaft profile, at the middle part of valve base 6, there is an annular boss 6c, the axial length of this annular boss 6c equals the length of the right sector hole of housing 1 step hole, the annular boss 6c of valve base 6 is positioned at the right sector hole of housing 1 step hole and keeps Spielpassung, on the external cylindrical surface of annular boss 6c, there is valve base collar half mounting groove that a cross section is semicircular annular, the sectional dimension of the sectional dimension of valve base collar half mounting groove and housing collar half mounting groove is identical and position is corresponding, valve base collar half mounting groove and housing collar half mounting groove are combined to form complete collar mounting groove, collar 8 is arranged in collar mounting groove housing 1 and valve base 6 is connected to integral body, on the external cylindrical surface of valve base 6 annular boss 6c the right optical axises, there is the second seal ring mounting groove, the second seal ring 7 is arranged in the second seal ring mounting groove, between the left and right end face of valve base 6, there is a through hole 6b, on the external cylindrical surface of valve base 6 annular boss 6c the right optical axises, there is a spill port 6a who radially connects on the left side of the second seal ring mounting groove, the through hole 6b quadrature of spill port 6a and valve base 6 connects, valve 5 is left ends with the cylinder axis of convex shoulder radially, valve 5 inserts in the through hole 6b of valve base 6, the diameter of axle of valve 5 is less than aperture 0.003mm～0.006mm of through hole 6b, the right side of valve 5 left end convex shoulders and the laminating of the left side of valve 5, the right side of valve 5 is positioned at the right of valve base 6 spill port 6a, and spill port 6a is sealed, at the center, left side of valve 5, have a valve ball-and-socket, have a first spring seat spherical surface hill 3a at the center of the first spring seat 3 right sides, this spherical surface hill 3a withstands the valve ball-and-socket of valve 5 left sides, at the center of the second spring seat 4 left sides, have a second spring seat spherical surface hill 4a, in the bottom center of housing 1 endoporus, have a housing ball-and-socket, the second spring seat spherical surface hill 4a withstands the housing ball-and-socket of housing 1, when the pressure of hydraulic actuator inner chamber is not more than safety pressure, valve 5 seals spill port 6a, when the pressure of hydraulic actuator inner chamber is greater than safety pressure, the right side of valve 5 enters the perforation region of the through hole 6b of spill port 6a and valve base 6, and spill port 6a is communicated with the inner chamber of hydraulic actuator.
Advantage of the present invention is: proposed a kind of good seal performance, be not easy the hydraulic actuator overload protection valve of clamping stagnation, guaranteed the sealing effect of valve mechanism, extended actuator working life, improved the reliability of work.
Accompanying drawing explanation
Fig. 1 is the structural representation of current a kind of hydraulic actuator overload protection valve.
Fig. 2 is structural representation of the present invention.
Embodiment
Below the present invention is described in further details.Referring to Fig. 2, a kind of hydraulic actuator overload protection valve, comprises housing 1, spring 2, the first spring seat 3, the second spring seat 4, the second seal ring 7, collar 8 and the first seal ring 9, housing 1 is a left end sealing, the cylinder that right-hand member is unlimited, the external cylindrical surface of housing 1 is divided into four sections, left section is outer six side's sections, second segment is external thread section from left to right, the 3rd section is primary optic axis section from left to right, right section is the second optical axis section, the core diameter of thread of external thread section is greater than the external diameter of primary optic axis section, the external diameter of primary optic axis section is greater than the external diameter of the second optical axis section, on the external cylindrical surface of primary optic axis section, there is primary optic axis section seal groove, the first seal ring 9 is arranged in primary optic axis section seal groove, the endoporus of housing 1 is step hole, the left sector hole footpath of this step hole is less than right sector hole footpath, the position of the position of the right sector hole of this step hole and the second optical axis section is corresponding, on the inwall of the right sector hole of housing 1 step hole, there is housing collar half mounting groove that a cross section is semicircular annular, on the external cylindrical surface of housing 1 second optical axis section, there is a collar mounting hole 1a, this collar mounting hole 1a and the two-way tangential perforation of housing collar half mounting groove, spring 2 is positioned at the left sector hole of housing 1 step hole, and the first spring seat 3 is positioned at the right-hand member of spring 2, and the second spring seat 4 is positioned at the left end of spring 2, it is characterized in that: by a valve mechanism being formed by valve 5 and valve base 6, valve base 6 has Step Shaft profile, at the middle part of valve base 6, there is an annular boss 6c, the axial length of this annular boss 6c equals the length of the right sector hole of housing 1 step hole, the annular boss 6c of valve base 6 is positioned at the right sector hole of housing 1 step hole and keeps Spielpassung, on the external cylindrical surface of annular boss 6c, there is valve base collar half mounting groove that a cross section is semicircular annular, the sectional dimension of the sectional dimension of valve base collar half mounting groove and housing collar half mounting groove is identical and position is corresponding, valve base collar half mounting groove and housing collar half mounting groove are combined to form complete collar mounting groove, collar 8 is arranged in collar mounting groove housing 1 and valve base 6 is connected to integral body, on the external cylindrical surface of valve base 6 annular boss 6c the right optical axises, there is the second seal ring mounting groove, the second seal ring 7 is arranged in the second seal ring mounting groove, between the left and right end face of valve base 6, there is a through hole 6b, on the external cylindrical surface of valve base 6 annular boss 6c the right optical axises, there is a spill port 6a who radially connects on the left side of the second seal ring mounting groove, the through hole 6b quadrature of spill port 6a and valve base 6 connects, valve 5 is left ends with the cylinder axis of convex shoulder radially, valve 5 inserts in the through hole 6b of valve base 6, the diameter of axle of valve 5 is less than aperture 0.003mm～0.006mm of through hole 6b, the right side of valve 5 left end convex shoulders and the laminating of the left side of valve 5, the right side of valve 5 is positioned at the right of valve base 6 spill port 6a, and spill port 6a is sealed, at the center, left side of valve 5, have a valve ball-and-socket, have a first spring seat spherical surface hill 3a at the center of the first spring seat 3 right sides, this spherical surface hill 3a withstands the valve ball-and-socket of valve 5 left sides, at the center of the second spring seat 4 left sides, have a second spring seat spherical surface hill 4a, in the bottom center of housing 1 endoporus, have a housing ball-and-socket, the second spring seat spherical surface hill 4a withstands the housing ball-and-socket of housing 1, when the pressure of hydraulic actuator inner chamber is not more than safety pressure, valve 5 seals spill port 6a, when the pressure of hydraulic actuator inner chamber is greater than safety pressure, the right side of valve 5 enters the perforation region of the through hole 6b of spill port 6a and valve base 6, and spill port 6a is communicated with the inner chamber of hydraulic actuator.
Working principle of the present invention is: hydraulic actuator overload protection valve is arranged in the mounting hole on actuator housing; on actuator housing, there is a step hole; step hole divides four sections, and overload protection valve is arranged in step hole, and this step hole and actuator housing inner chamber are communicated with.One section of step hole outermost is internal thread, is combined overload protection valve and actuator housing are connected as a single entity with overload protection valve chest 1 outside thread.It is unthreaded hole that step hole plays second segment outward, coordinates with the first paragraph optical axis section of overload protection valve chest, by the first seal ring 9 sealings, prevents that actuator housing inner fluid from leaking.It is unthreaded hole that step hole plays the 3rd section outward, with the second segment optical axis section Spielpassung of overload protection valve chest.Inside step Kongzui, one section is unthreaded hole, coordinates with right section of optical axis section of valve base 6, by the second seal ring 7 sealings, spill port 6a and actuator housing inner chamber is separated.At step hole, rise outward on the inwall of second segment unthreaded hole and have an annular groove; this annular groove is corresponding with the position of spill port 6a on overload protection valve valve base 6; in actuator enclosure interior, have oil circuit, the inner of this oil circuit and annular groove are communicated with, and the outer end of this oil circuit and actuator oil return system are communicated with.When the pressure of hydraulic actuator inner chamber is not more than safety pressure, valve 5 seals spill port 6a; When the pressure of hydraulic actuator inner chamber is greater than safety pressure, the right side of valve 5 enters the perforation region of the through hole 6b of spill port 6a and valve base 6, and spill port 6a is communicated with the inner chamber of hydraulic actuator.
The present invention is coordinated and forms face sealing means with the inner cylindrical surface of the through hole 6b of valve base 6 by valve 5 cylinder axis external cylindrical surfaces, the linear sealing mode that has replaced original steel ball and aperture to form, because face sealing means has good sealing effect and abrasion resistance properties than linear sealing mode, therefore, guaranteed the sealing effect of valve mechanism, extend actuator working life, improved the reliability of work.
One embodiment of the present of invention, the diameter of axle of valve 5 is 9.996mm, is less than the aperture 10.000mm of through hole 6b, the radial clearance of valve 5 and through hole 6b is 0.004mm.This example carries out opening and closing for 1,000,000 times test sealability without decline in process of the test, and without catching phenomenon, reliability obviously improves.
Claims (1)
1. a hydraulic actuator overload protection valve, comprises housing (1), spring (2), the first spring seat (3), the second spring seat (4), the second seal ring (7), collar (8) and the first seal ring (9), housing (1) is a left end sealing, the cylinder that right-hand member is unlimited, the external cylindrical surface of housing (1) is divided into four sections, left section is outer six side's sections, second segment is external thread section from left to right, the 3rd section is primary optic axis section from left to right, right section is the second optical axis section, the core diameter of thread of external thread section is greater than the external diameter of primary optic axis section, the external diameter of primary optic axis section is greater than the external diameter of the second optical axis section, on the external cylindrical surface of primary optic axis section, there is primary optic axis section seal groove, the first seal ring (9) is arranged in primary optic axis section seal groove, the endoporus of housing (1) is step hole, the left sector hole footpath of this step hole is less than right sector hole footpath, the position of the position of the right sector hole of this step hole and the second optical axis section is corresponding, on the inwall of the right sector hole of housing (1) step hole, there is housing collar half mounting groove that a cross section is semicircular annular, on the external cylindrical surface of housing (1) second optical axis section, there is a collar mounting hole (1a), this collar mounting hole (1a) and the two-way tangential perforation of housing collar half mounting groove, spring (2) is positioned at the left sector hole of housing (1) step hole, and the first spring seat (3) is positioned at the right-hand member of spring (2), and the second spring seat (4) is positioned at the left end of spring (2), it is characterized in that: have a valve mechanism being formed by valve (5) and valve base (6), valve base (6) has Step Shaft profile, at the middle part of valve base (6), there is an annular boss (6c), the axial length of this annular boss (6c) equals the length of the right sector hole of housing (1) step hole, the annular boss (6c) of valve base (6) is positioned at the right sector hole of housing (1) step hole and keeps Spielpassung, on the external cylindrical surface of annular boss (6c), there is valve base collar half mounting groove that a cross section is semicircular annular, the sectional dimension of the sectional dimension of valve base collar half mounting groove and housing collar half mounting groove is identical and position is corresponding, valve base collar half mounting groove and housing collar half mounting groove are combined to form complete collar mounting groove, collar (8) is arranged in collar mounting groove housing (1) and valve base (6) is connected to integral body, on the external cylindrical surface of valve base (6) annular boss (6c) the right optical axis, there is the second seal ring mounting groove, the second seal ring (7) is arranged in the second seal ring mounting groove, between the left and right end face of valve base (6), there is a through hole (6b), on the external cylindrical surface of valve base (6) annular boss (6c) the right optical axis, there is a spill port (6a) radially connecting on the left side of the second seal ring mounting groove, through hole (6b) the quadrature perforation of spill port (6a) and valve base (6), valve (5) is a left end with the cylinder axis of convex shoulder radially, valve (5) inserts in the through hole (6b) of valve base (6), the diameter of axle of valve (5) is less than the aperture 0.003mm～0.006mm in through hole (6b), the right side of valve (5) left end convex shoulder and the laminating of the left side of valve (5), the right side of valve (5) is positioned at the right of valve base (6) spill port (6a), and spill port (6a) is sealed, at the center, left side of valve (5), there is a valve ball-and-socket, at the center of the first spring seat (3) right side, have a first spring seat spherical surface hill (3a), this spherical surface hill (3a) withstands the valve ball-and-socket of valve (5) left side, at the center of the second spring seat (4) left side, there is a second spring seat spherical surface hill (4a), there is a housing ball-and-socket in bottom center at housing (1) endoporus, and the second spring seat spherical surface hill (4a) withstands the housing ball-and-socket of housing (1), when the pressure of hydraulic actuator inner chamber is not more than safety pressure, valve (5) seals spill port (6a), when the pressure of hydraulic actuator inner chamber is greater than safety pressure, the right side of valve (5) enters the perforation region in the through hole (6b) of spill port (6a) and valve base (6), and spill port (6a) is communicated with the inner chamber of hydraulic actuator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310652130.9A CN103615581B (en) | 2013-12-04 | 2013-12-04 | A kind of overload protective valve of hydraulic actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310652130.9A CN103615581B (en) | 2013-12-04 | 2013-12-04 | A kind of overload protective valve of hydraulic actuator |
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| Publication Number | Publication Date |
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| CN103615581A true CN103615581A (en) | 2014-03-05 |
| CN103615581B CN103615581B (en) | 2016-08-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310652130.9A Active CN103615581B (en) | 2013-12-04 | 2013-12-04 | A kind of overload protective valve of hydraulic actuator |
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| Country | Link |
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| CN (1) | CN103615581B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106956464A (en) * | 2017-05-22 | 2017-07-18 | 四川瑞丰锻造有限公司 | A kind of overload protection arrangement of forging press |
| CN109296480A (en) * | 2018-11-21 | 2019-02-01 | 中国航发西安动力控制科技有限公司 | A kind of anti-pollution valve assembly |
| CN111868424A (en) * | 2018-03-02 | 2020-10-30 | 洛昂有限责任公司 | Overload protection valve |
| CN112728193A (en) * | 2020-12-25 | 2021-04-30 | 兰州飞行控制有限责任公司 | Valve closing actuator |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5285813A (en) * | 1990-02-22 | 1994-02-15 | Ingenieurtechnik Gmbh & Co. Kg | Pressure limiting valve with stable spring pad |
| CN201475451U (en) * | 2009-07-28 | 2010-05-19 | 温州顺尔达管件设备有限公司 | Ultrahigh pressure regulating overflow valve |
| CN201672113U (en) * | 2010-04-26 | 2010-12-15 | 长春航空液压控制有限公司 | High-precision safety valve |
| CN102734249A (en) * | 2012-07-18 | 2012-10-17 | 严光贤 | Overload valve |
| CN203176034U (en) * | 2013-02-04 | 2013-09-04 | 陕西航天动力高科技股份有限公司 | Volume changeable compact type overload oil supplement valve |
-
2013
- 2013-12-04 CN CN201310652130.9A patent/CN103615581B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5285813A (en) * | 1990-02-22 | 1994-02-15 | Ingenieurtechnik Gmbh & Co. Kg | Pressure limiting valve with stable spring pad |
| CN201475451U (en) * | 2009-07-28 | 2010-05-19 | 温州顺尔达管件设备有限公司 | Ultrahigh pressure regulating overflow valve |
| CN201672113U (en) * | 2010-04-26 | 2010-12-15 | 长春航空液压控制有限公司 | High-precision safety valve |
| CN102734249A (en) * | 2012-07-18 | 2012-10-17 | 严光贤 | Overload valve |
| CN203176034U (en) * | 2013-02-04 | 2013-09-04 | 陕西航天动力高科技股份有限公司 | Volume changeable compact type overload oil supplement valve |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106956464A (en) * | 2017-05-22 | 2017-07-18 | 四川瑞丰锻造有限公司 | A kind of overload protection arrangement of forging press |
| CN111868424A (en) * | 2018-03-02 | 2020-10-30 | 洛昂有限责任公司 | Overload protection valve |
| CN109296480A (en) * | 2018-11-21 | 2019-02-01 | 中国航发西安动力控制科技有限公司 | A kind of anti-pollution valve assembly |
| CN112728193A (en) * | 2020-12-25 | 2021-04-30 | 兰州飞行控制有限责任公司 | Valve closing actuator |
| CN112728193B (en) * | 2020-12-25 | 2022-07-05 | 兰州飞行控制有限责任公司 | Valve closing actuator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103615581B (en) | 2016-08-03 |
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