CN201526549U - Inverse-proportion pressure reducing valve - Google Patents
Inverse-proportion pressure reducing valve Download PDFInfo
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- CN201526549U CN201526549U CN2009200350654U CN200920035065U CN201526549U CN 201526549 U CN201526549 U CN 201526549U CN 2009200350654 U CN2009200350654 U CN 2009200350654U CN 200920035065 U CN200920035065 U CN 200920035065U CN 201526549 U CN201526549 U CN 201526549U
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Abstract
The utility model relates to an inverse-proportion pressure reducing valve which comprises an electromagnet component and a control valve component, wherein the electromagnet component consists of a yoke, a solenoid coil embedded in the yoke, a static iron and a pressure plate arranged in the solenoid coil, a spring component and a mandril arranged in the static iron, and a magnetic shield and an armature arranged in the pressure plate, wherein the armature can move axially along a guide sleeve under the action of the solenoid coil; the spring component consists of adjusting screws and spring; the adjusting screws, the spring, the madril and the armature are arranged in sequence along the axis from left to right, wherein the mandril is fixedly connected with the armature; and the armature is contacted with the control valve component. The inverse-proportion pressure reducing valve solve the technical problems that in the prior art, the pressure reduction range of the pressure reducing valve is not wide enough, the linearity is not good, and the structure is complicated, and has the advantages of simple structure and applicability.
Description
Technical field
The utility model relates to a kind of inverse proportion vacuum solenoid valve of serially, pari passu the oil liquid pressure in automatic gearbox hydraulic system or the industrial hydraulic automatic control system being controlled, and belongs to the hydraulic control field.
Background technique
Proportional pressure valve be a kind of electrical control signal by input continuously, the pressure to fluid carries out remotely-controlled valve pari passu.Compare with the common hydrovalve of manual tune, electrohydraulic proportional control valve can improve the controlling level of hydraulic system parameters; Compare with electrohydraulic control, the electric-hydraulic proportion pressure controlled valve is a bit weaker aspect some hydraulic performance, but it is simple in structure, contamination resistance is strong, cost is low, so be widely used in requirement hydraulic parameter is carried out continuous control, distant control or program control.
At present, in automatic gearbox, in working connection and the lubricating cooling oil road common proportional pressure valve some be exactly the electric-hydraulic proportion pressure valve of usefulness.In automatic transmission, oil hydraulic pump is directly driven by motor, and the theoretical pump oil mass of oil hydraulic pump and the rotating speed of motor are directly proportional.In order to guarantee the proper functioning of automatic transmission, the pump oil mass of oil hydraulic pump should also can satisfy the needs of automatic transmission each several part when motor is in the minimum speed operating mode, and sufficiently high oil pressure arranged in the assurance oil circuit, to prevent that oil pressure is low excessively, make clutch, slipping of brake, influence the transmission of power of automatic transmission.Owing to differ greatly between the idling speed of motor and the maximum speed of motor, therefore when engine running, the pump oil mass of oil hydraulic pump will substantially exceed the required oil mass of automatic transmission, cause oil pressure too high, increase the load of motor, and cause shift impact.For this reason, one or several hydraulic adjustment device must be set in oil circuit, the pump oil pressure all-the-time stable that makes oil hydraulic pump within the specific limits, to satisfy of the requirement of the various operating modes of automatic transmission to the oil circuit oil pressure.
In addition, proportional pressure valve often with the duplex form as the proportion directional throttle valve pilot stage of proportional multi-path valve particularly, and often be used for the automatic gearbox of vehicles dispatch control system with component form.Existing pressure regulation direct action type proportional pressure-reducing valve, though structure is varied, it is few to have realized producing and be applied to actual product in batches.
There is following defective in existing proportional pressure-reducing valve:
1, existing proportional pressure-reducing valve pressure relief ranges is wide inadequately, and the linearity is bad, and the fluctuation of control mouth pressure is big, and dynamic characteristic difference etc. are a series of former thereby cause its poor practicability, and application area is few.
2, the proportional pressure-reducing valve flow adjustment range in the existing fluid control system is little.
3, the thread cartridge formula of existing proportional pressure-reducing valve major part employing connects, because the existence of worm structure makes that installation is loaded down with trivial details.But also exist worm structure at screw-in with when screwing out, and be easy to generate the screw thread bits, bring a series of adverse influences such as impurity and pollution fluid for other component.
4, existing proportional pressure-reducing valve is because the oil circuit design on valve body, causes the valve body structure complexity.
Summary of the invention
The utility model purpose is the inverse proportion reduction valve that proposes a kind of structure optimization, and it has solved wide inadequately, the technical problems such as the linearity is bad, complex structure of pressure relief ranges of prior art reduction valve.
Technical solution of the present utility model is:
A kind of inverse proportion reduction valve, comprise electromagnet assembly and control valve assembly, its special way is: electromagnet assembly comprises yoke, is embedded in the interior electromagnetic coil of yoke, is arranged on electromagnetic coil interior quiet iron and pressing plate, is arranged on quiet iron interior spring assembly and push rod, is arranged on magnetic shield and armature in the pressing plate; Armature can carry out axial motion at the effect lower edge of electromagnetic coil guide sleeve; Spring assembly comprises adjusts screw and spring, and adjustment screw, spring, push rod, armature are arranged in order along axis from left to right; Wherein push rod and armature are connected, and armature and control valve assembly contact.
Above-mentioned control valve assembly comprises oil circuit, valve body, is arranged on the valve seat of valve body right-hand member inside and the spool that is arranged on valve body left end inside; The left end of described valve body is connected by yoke and pressing plate; Described oil circuit is arranged on valve core inside; Bilateral symmetry is provided with pressure entrance and drain tap about on the described valve body; Described spool be provided with at least one oil-through hole and with oil-through hole corresponding annular groove; Described spool and valve seat are arranged in order along axis from left to right; Described armature and spool contact.
Above-mentioned valve body is provided with locating groove, and described locating groove is provided with the drain tap that can communicate with body cavity.
Above-mentioned pressure entrance is provided with filter screen.
Advantage of the present utility model:
1, the utility model has adopted brand-new mechanics base of design: spring force=electromagnetic force+outlet pressure.The spring of original proportional pressure-reducing valve is between valve seat and spool, the utility model is arranged on the push rod outside with spring, because spring force and displacement are linear, as long as make the relation of electromagnetic force and control signal also be linear relationship, then according to above-mentioned listed mechanics formula, outlet pressure also is a linear change.Because in the whole formula, having only a control signal is that electromagnetic force is an independent variable, so outlet pressure is a linear change with control signal.Existing proportional pressure-reducing valve is along with electric current increases, and the proportional example of outlet pressure increases, because the utility model is arranged on the push rod outside with spring, from above-mentioned formula as can be known, under the constant situation of spring force, outlet pressure reduces along with the increase of electric current is inverse proportion, produces the inverse proportion effect.
2, the utility model is provided with oil circuit and oil circuit opening on spool, has reduced the length of oil circuit on the valve body, has simplified the structure of valve body, makes the processing technology of valve body simple, is suitable for mass production.
3, the utility model valve body is provided with locating groove, and locating groove and drain tap design for one.The utility model fixes installing the mode that adopts clamp to insert locating groove, mount and dismount very conveniently, compares with thread cartridge formula in the past and to install simply.Secondly, because the locating groove structure is not easy to produce metal fillings, can not produce adverse effects such as impurity and pollution fluid.
4, the utility model valve seat adjustable positions.Because of spool is close together with valve seat under the promotion of spring force, so when the change in location of valve seat, the position of spool has also just changed, the relative position that will cause the opening of oil circuit on the opening of oil circuit on the spool and the valve body like this changes, the aperture of oil circuit opening is changed, thereby the flow that flows through oil circuit is changed.Like this, the such structural design of the utility model can strengthen inverse proportion reduction valve satisfying flow performance in the actual fluid control system.
5, the utility model is provided with and adjusts screw and spring.By adjusting screw, can change the pre compressed magnitude of spring, by the transmission of power, thereby spring force is imposed on spool, thereby can adjust the pressure of spool outlet port fluid.Because it is dismountable adjusting screw, so just can be by changing the spring of different-stiffness, thereby change the scaling factor that the reduction valve outlet pressure changes, and then just can control and adjust the pressure control range and the dynamic characteristic of reduction valve, so this reduction valve application area is wider, control ability is stronger.
6, the utility model is by being designed to quiet iron basin type structure, make armature can be at the bottom of by quiet iron basin type, guide sleeve and valve body be free to slide in the space formed, but there is no Mechanical Contact between armature and the quiet iron.By structural like this design, make that the electromagnetic force that armature is subjected to is proportional to change when changing by the coil current on the electromagnet.And when the distance between quiet iron and the armature changed in certain scope, the size of this electromagnetic force was not change.Like this, but the utility model reduction valve has just had the ability of oil liquid pressure behind the ratio ground control valve.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Wherein: 1-adjusts screw, 2-yoke, the quiet iron of 3-, 4-spring, the 5-spring pad, 6-bearing, 7-push rod, 8-electromagnetic coil, 9-armature, 10-pressing plate, 11-guide sleeve, 13-filter screen, the 14-spool, 16-valve seat, 17-valve body, P-pressure entrance, the T-drain tap, L-oil circuit, A-pressure export, the 18-locating groove, 19-oil-through hole, 20-circular groove.
Embodiment
Be illustrated in figure 1 as inverse proportion structure of relief pressure valve schematic representation of the present utility model, comprise electromagnet assembly and control valve assembly, electromagnet assembly comprises yoke 2, be embedded in electromagnetic coil 8 in the yoke 2, be arranged on quiet iron 3 and pressing plate 10 in the electromagnetic coil 8, be arranged on spring assembly and push rod 7 in the quiet iron 3, be arranged on guide sleeve 11 and armature 9 in the pressing plate 10; Armature 9 can carry out axial motion at the effect lower edge of electromagnetic coil 8 guide sleeve 11; Spring assembly comprises adjusts screw 1 and spring 4, and adjustment screw 1, spring 4, spring pad 5, push rod 7, armature 9 are arranged in order along axis from left to right; Wherein be provided with bearing 6 between push rod and the quiet iron, push rod one end 7 and armature 9 are connected, and armature 9 and control valve assembly contact.Spring is arranged on the push rod outside, according to formula: spring force=electromagnetic force+outlet pressure as can be known, under the constant situation of spring force, outlet pressure reduces along with the increase of electric current is inverse proportion, produces the inverse proportion effect.
The spool 14 that the control valve assembly comprises oil circuit L, valve body 17, is arranged on the valve seat 16 of valve body 17 right-hand member inside and is arranged on valve body 12 left end inside; The left end of valve body 14 is connected by yoke 2 and pressing plate 10; Oil circuit L is arranged on spool 14 inside; Bilateral symmetry is provided with pressure entrance P and drain tap T about on the valve body 17; Spool 14 be provided with at least one oil-through hole 19 and with oil-through hole 19 corresponding annular grooves 20, the folding of oil circuit when circular groove is used for valve core movement; Spool 14 and valve seat 16 are arranged in order along axis from left to right; Armature 9 and spool 14 contact.Oil circuit and oil circuit opening are set on the spool, have reduced the length of oil circuit on the valve body, simplified the structure of valve body, make the processing technology of valve body simple, be suitable for mass production
Valve body is provided with locating groove 18, and locating groove 18 is provided with the drain tap T that can communicate with valve body 17 inner chambers.Pressure entrance P is provided with filter screen 13.Install the mode that adopts clamp to insert locating groove and fix, mount and dismount very conveniently, compare with thread cartridge formula in the past and to install simply.Secondly, because the locating groove structure is not easy to produce metal fillings, can not produce adverse effects such as impurity and pollution fluid.
Working principle of the present utility model:
For the ease of in the engineering reality to controlling by the size of the coil current on the electromagnet.When control signal was the pulse-width modulation method that generally adopts in the engineering reality, feasible size of current by coil changed accordingly.Thereby in the working control of valve, the dutycycle by changing pulse duration modulation is the outlet pressure of may command solenoid valve just.For example, be that the fluid of 1MPa is example with the inlet pressure of solenoid valve, in an operation cycle, pwm control signal makes spool vibration or vibration up and down on valve seat.In a period of time in the described operation cycle, liquid under the effect of inlet pressure, makes the lasting rising of pressure of outlet by the opening of oil circuit on opening on the valve body and the spool.When outlet pressure did not reach predetermined pressure, the oil circuit opening on the spool can not hidden by valve body, and the liquid of inlet just flows to outlet constantly, made outlet pressure continue to raise.When the pressure of outlet reaches predetermined force value, the oil circuit opening on the spool is just hidden by valve body, and the entrance and exit of reduction valve is realized cutting off, and outlet realizes that pressure is constant.
As outlet pressure is raise, the dutycycle of the pwm signal at can regulate reduction valve coil two ends by reducing the dutycycle of control signal, the electric current of flowing through coil is reduced, thereby the electromagnetic force on the armature reduces.Like this, will force spool to produce the position and move, the opening of oil circuit inlet on oil circuit opening and the valve body on the spool is communicated, thus the outlet pressure rising.It is pointed out that the variable quantity of this reduction valve outlet pressure and the current change quantity of flowing through coil are inversely proportional to.Equally, outlet pressure is reduced, the dutycycle of the pwm signal at can regulate reduction valve coil two ends by increasing the dutycycle of control signal, the electric current of flowing through coil is increased, thereby the electromagnetic force on the armature increases.Like this, will force spool to produce the position and move, the opening of drain tap communicates on the opening that makes the oil circuit on the spool and the valve body, thus outlet pressure decline.The current change quantity that it is pointed out that the variable quantity of this reduction valve outlet pressure and flowing through coil equally is proportional:
ΔP＝-k·ΔI
Wherein: Δ P is the outlet pressure variable quantity, and k is a scaling factor, and Δ I is a current change quantity.
Claims (4)
1. inverse proportion reduction valve, comprise electromagnet assembly and control valve assembly, it is characterized in that: described electromagnet assembly comprises yoke, is embedded in the interior electromagnetic coil of yoke, is arranged on electromagnetic coil interior quiet iron and pressing plate, is arranged on quiet iron interior spring assembly and push rod, is arranged on magnetic shield and armature in the pressing plate; Described armature can carry out axial motion at the effect lower edge of electromagnetic coil guide sleeve; Described spring assembly comprises adjusts screw and spring, and described adjustment screw, spring, push rod, armature are arranged in order along axis from left to right; Wherein push rod and armature are connected, and armature and control valve assembly contact.
2. inverse proportion reduction valve according to claim 1 is characterized in that: described control valve assembly comprises oil circuit, valve body, is arranged on the valve seat of valve body right-hand member inside and the spool that is arranged on valve body left end inside; The left end of described valve body is connected by yoke and pressing plate; Described oil circuit is arranged on valve core inside; Bilateral symmetry is provided with pressure entrance and drain tap about on the described valve body; Described spool be provided with at least one oil-through hole and with oil-through hole corresponding annular groove; Described spool and valve seat are arranged in order along axis from left to right; Described armature and spool contact.
3. inverse proportion reduction valve according to claim 1 and 2 is characterized in that: described valve body is provided with locating groove, and described locating groove is provided with the drain tap that can communicate with body cavity.
4. inverse proportion reduction valve according to claim 3 is characterized in that: described pressure entrance is provided with filter screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200350654U CN201526549U (en) | 2009-10-16 | 2009-10-16 | Inverse-proportion pressure reducing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200350654U CN201526549U (en) | 2009-10-16 | 2009-10-16 | Inverse-proportion pressure reducing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201526549U true CN201526549U (en) | 2010-07-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200350654U Expired - Lifetime CN201526549U (en) | 2009-10-16 | 2009-10-16 | Inverse-proportion pressure reducing valve |
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| CN (1) | CN201526549U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102537416A (en) * | 2010-11-10 | 2012-07-04 | 罗伯特·博世有限公司 | Pressure regulating valve, particularly for controlling a clutch in a motor vehicle automatic transmission |
| CN102628462A (en) * | 2012-04-18 | 2012-08-08 | 江苏悦达专用车有限公司 | Box toppling cylinder of sweeping machine |
| CN102954057A (en) * | 2012-11-22 | 2013-03-06 | 太原理工大学 | Electric closed-loop control three-way proportional pressure-reducing valve |
| CN103016796A (en) * | 2012-12-28 | 2013-04-03 | 大连理工大学 | High-pressure high-flow quick response valve body assembly of two-position two-way valve |
| CN103050217A (en) * | 2012-12-14 | 2013-04-17 | 兰溪市中元电器有限公司 | Proportional electromagnet for magnetic valve of automatic transmission |
| CN106122566A (en) * | 2016-08-31 | 2016-11-16 | 北京小米移动软件有限公司 | Eliminate the method and device of electromagnetic valve noise |
-
2009
- 2009-10-16 CN CN2009200350654U patent/CN201526549U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102537416A (en) * | 2010-11-10 | 2012-07-04 | 罗伯特·博世有限公司 | Pressure regulating valve, particularly for controlling a clutch in a motor vehicle automatic transmission |
| CN102537416B (en) * | 2010-11-10 | 2017-10-27 | 罗伯特·博世有限公司 | The pressure regulator valve being controlled especially for clutch in automatic gearbox |
| CN102628462A (en) * | 2012-04-18 | 2012-08-08 | 江苏悦达专用车有限公司 | Box toppling cylinder of sweeping machine |
| CN102954057A (en) * | 2012-11-22 | 2013-03-06 | 太原理工大学 | Electric closed-loop control three-way proportional pressure-reducing valve |
| CN102954057B (en) * | 2012-11-22 | 2015-08-19 | 太原理工大学 | The threeway proportional pressure-reducing valve of electricity closed loop control |
| CN103050217A (en) * | 2012-12-14 | 2013-04-17 | 兰溪市中元电器有限公司 | Proportional electromagnet for magnetic valve of automatic transmission |
| CN103050217B (en) * | 2012-12-14 | 2016-08-03 | 兰溪市中元电器有限公司 | Electromagnetic Valve for Automatic Transmission proportion electro-magnet |
| CN103016796A (en) * | 2012-12-28 | 2013-04-03 | 大连理工大学 | High-pressure high-flow quick response valve body assembly of two-position two-way valve |
| CN106122566A (en) * | 2016-08-31 | 2016-11-16 | 北京小米移动软件有限公司 | Eliminate the method and device of electromagnetic valve noise |
| CN106122566B (en) * | 2016-08-31 | 2019-03-15 | 北京小米移动软件有限公司 | Eliminate the method and device of electromagnetic valve noise |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20100714 Effective date of abandoning: 20091016 |
|
| RGAV | Abandon patent right to avoid regrant |