CN201606322U - Built-in oil circuit type proportional pressure-reducing valve - Google Patents
Built-in oil circuit type proportional pressure-reducing valve Download PDFInfo
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- CN201606322U CN201606322U CN2009200350743U CN200920035074U CN201606322U CN 201606322 U CN201606322 U CN 201606322U CN 2009200350743 U CN2009200350743 U CN 2009200350743U CN 200920035074 U CN200920035074 U CN 200920035074U CN 201606322 U CN201606322 U CN 201606322U
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Abstract
The utility model relates to a built-in oil circuit type proportional pressure-reducing valve, which comprises an electromagnet and an electromagnetic valve. The electromagnetic valve comprises a valve body, a valve spool and a valve base, the valve body is provided with a radial pressure inlet and an oil drain opening, the valve base is provided with a radial pressure outlet, an axial oil flowing passage is disposed inside the valve spool, the oil flowing passage is opened on an end surface of the valve spool contacting with the valve base and communicated with the pressure outlet, a lateral wall of the valve spool is provided with at least one oil flowing hole communicated with the oil flowing passage, the outer side surface of the valve spool is provided with an annular groove corresponding to the position of the oil flowing hole, the annular groove is used for opening and closing the pressure inlet and the oil flowing hole, and the pressure inlet, the annular groove, the oil flowing hole, the oil flowing passage and the pressure outlet form an oil circuit. The proportional pressure-reducing valve resolves technical problems that the oil flowing passage of the existing proportional pressure valve is complex in structure, has the advantages of simplifying the structure and the processing technique of the valve body and fitting for mass production.
Description
Technical field
The utility model relates to a kind of built-in oil circuit formula proportional pressure-reducing valve.
Background technique
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, proportional pressure valve can improve the controlling level of hydraulic system parameters; Compare with electrohydraulic control, proportional pressure control 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.But existing proportional pressure valve especially proportional pressure-reducing valve causes the valve body structure complexity because cross oily channels designs on valve body.
Summary of the invention
Cross the oil passage structure complicated technical problem in order to solve existing proportional pressure valve, the utility model proposes a kind of built-in oil circuit formula proportional pressure-reducing valve.
Technical solution of the present utility model is:
A kind of built-in oil circuit formula proportional pressure-reducing valve, it comprises electromagnet and solenoid valve, and described solenoid valve comprises valve body 17, spool 14 and valve seat 16, and its special way is: described valve body 17 is provided with radial pressure inlet P and drain tap T; Described valve seat is provided with radial pressure outlet A, be provided with in the described spool 14 and axially cross oily passage 21, the oily passage 21 of described mistake is opened on spool and the end face that valve seat contacts and with pressure export A and communicates, described spool sidewall has at least one and crosses the oil-through hole 19 that oily passage 21 communicates, described spool outer side surface is provided with and oil-through hole position corresponding annular groove 20, and described circular groove 20 is used for the folding of pressure entrance P and oil-through hole 19; Described pressure entrance, circular groove, oil-through hole, the oily passage of mistake and pressure export constitute asphalt channel.
Above-mentioned drain tap T is opened in the draw-in groove 18 of valve body.
Above-mentioned pressure entrance P is provided with filter screen 13.
Advantage of the present utility model: the utility model provides a kind of built-in oil circuit formula proportional pressure-reducing valve, circular groove, oil-through hole are set on spool and cross oily passage, 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.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Wherein: the 2-yoke, the quiet iron of 3-, the 13-filter screen, the 14-spool, the 16-valve seat, the 17-valve body, the 18-draw-in groove, the 19-oil-through hole, 20-circular groove, 21-are crossed oily passage, P-pressure entrance, T-drain tap, A-pressure export.
Embodiment
Be illustrated in figure 1 as a kind of built-in oil circuit formula proportional pressure-reducing valve schematic representation of the present utility model, it comprises electromagnet and solenoid valve, described solenoid valve comprises valve body 17, spool 14, yoke 2, quiet iron 3, valve seat 16, and valve body 17 is provided with radial pressure inlet P and drain tap T; Valve seat 16 is provided with radial pressure outlet A, be provided with in the spool 14 and axially cross oily passage 21, crossing oily passage 21 is opened on spool and the end face that valve seat contacts and with pressure export A and communicates, the spool sidewall has at least one and crosses the oil-through hole 19 that oily passage 21 communicates, the spool outer side surface is provided with and oil-through hole position corresponding annular groove 20, and circular groove 20 is used for the folding of pressure entrance P and oil-through hole 19; Pressure entrance, circular groove, oil-through hole, the oily passage of mistake and pressure export constitute asphalt channel.Drain tap T is opened in the draw-in groove 18 of valve body.Pressure entrance P is provided with filter screen 13.
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 crossing the opening of oily passage on opening on the valve body and the spool.When outlet pressure did not reach predetermined pressure, the oily access portal of the mistake 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 oily access portal of the mistake 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 crossing oily feeder connection on the oily access portal of mistake 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 oily passage of mistake 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 (3)
1. built-in oil circuit formula proportional pressure-reducing valve, it comprises electromagnet and solenoid valve, described solenoid valve comprises valve body (17), spool (14) and valve seat (16), it is characterized in that: described valve body (17) is provided with radial pressure inlet (P) and drain tap (T); Described valve seat is provided with radial pressure outlet (A), be provided with in the described spool (14) and axially cross oily passage (21), the oily passage of described mistake (21) is opened on spool and the end face that valve seat contacts and with pressure export (A) and communicates, described spool sidewall has at least one and crosses the oil-through hole (19) that oily passage (21) communicates, described spool outer side surface is provided with and oil-through hole position corresponding annular groove (20), and described pressure entrance (P), circular groove (20), oil-through hole (19), the oily passage of mistake and pressure export (A) constitute asphalt channel.
2. a kind of built-in oil circuit formula proportional pressure-reducing valve according to claim 1, it is characterized in that: described drain tap (T) is opened in the draw-in groove (18) of valve body.
3. a kind of built-in oil circuit formula proportional pressure-reducing valve according to claim 1, it is characterized in that: described pressure entrance (P) is provided with filter screen (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200350743U CN201606322U (en) | 2009-10-16 | 2009-10-16 | Built-in oil circuit type proportional pressure-reducing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200350743U CN201606322U (en) | 2009-10-16 | 2009-10-16 | Built-in oil circuit type proportional pressure-reducing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201606322U true CN201606322U (en) | 2010-10-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200350743U Expired - Fee Related CN201606322U (en) | 2009-10-16 | 2009-10-16 | Built-in oil circuit type proportional pressure-reducing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201606322U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103032619A (en) * | 2012-12-14 | 2013-04-10 | 兰溪市中元电器有限公司 | Two-position three-way inverse proportion decompression electromagnetic valve for AT (Automatic Transmission) |
| CN107781457A (en) * | 2017-11-06 | 2018-03-09 | 北京理工大学 | A kind of side valve type proportional pressure-reducing valve |
| CN111442007A (en) * | 2020-04-07 | 2020-07-24 | 上海诺玛液压系统有限公司 | Large-traffic direct action type proportion relief pressure valve |
-
2009
- 2009-10-16 CN CN2009200350743U patent/CN201606322U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103032619A (en) * | 2012-12-14 | 2013-04-10 | 兰溪市中元电器有限公司 | Two-position three-way inverse proportion decompression electromagnetic valve for AT (Automatic Transmission) |
| CN107781457A (en) * | 2017-11-06 | 2018-03-09 | 北京理工大学 | A kind of side valve type proportional pressure-reducing valve |
| CN111442007A (en) * | 2020-04-07 | 2020-07-24 | 上海诺玛液压系统有限公司 | Large-traffic direct action type proportion relief pressure valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101013 Termination date: 20171016 |