CN203114766U - Electric-hydraulic proportional pressure control valve - Google Patents
Electric-hydraulic proportional pressure control valve Download PDFInfo
- Publication number
- CN203114766U CN203114766U CN 201320010372 CN201320010372U CN203114766U CN 203114766 U CN203114766 U CN 203114766U CN 201320010372 CN201320010372 CN 201320010372 CN 201320010372 U CN201320010372 U CN 201320010372U CN 203114766 U CN203114766 U CN 203114766U
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- Prior art keywords
- main valve
- valve
- electromagnetic coil
- seat
- spool
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- Expired - Fee Related
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Abstract
The utility model relates to an electric-hydraulic proportional pressure control valve which comprises a main valve sleeve (1), a main valve core assembly (2), a spring seat (4), a guiding valve core (6), a valve sleeve (3) and a valve seat (19). One end of the main valve sleeve (1) is provided with an oil inlet (13), the main valve core assembly (2) is sleeved inside the main valve sleeve (1), a throttle hole (21) is formed in the main valve core assembly (2), an oil outlet (14) is formed in the inner wall of the main valve sleeve (1), the spring seat (4) makes contact with the guiding valve core (6) in a matched mode, one end of the valve sleeve (3) is matched with the main valve sleeve (1), a bypass hole (15) is formed in the side wall of the valve seat (19), a cutting groove (20) is formed in the main valve sleeve (2), and the bypass hole (15), the cutting groove (20) and the oil outlet (14) are communicated sequentially. The electric-hydraulic proportional pressure control valve has the advantages of being compact in structure, large in range of controlling of fluid exit pressure, low in manufacturing cost and low in power consumption.
Description
Technical field
The utility model relates to the hydraulic control field, particularly the electric-hydraulic proportion pressure controlled valve.
Background technique
The electric-hydraulic proportion pressure controlled valve is a kind of newer proportional pressure valve, conventional pressure controlled valve has relief valve, reduction valve etc., they belong to the mechanical compression control valve, be that valve can only be set up one with respect to the pressure of spring force, when pressure reaches its setting after spring force was set, relief valve is just opened, and the pressure of system is remained under the overflow pressure regulation power of relief valve.No matter be the adjustment pressure that direct-acting type or the pressure controlled valve of leading type all can not be in operation continuous, and in fields such as engineering machinery, as loader, excavator, the hydraulic pressure radiation system of large type drill is in order to reduce noise, reduce the demand of thermal radiation and energy saving, need be at the pressure of machine continuously adjust system in service to the cooling heat radiation system on the vehicle.The oily temperature of hydraulic system is converted into the input signal of electric-hydraulic proportion pressure controlled valve, and the pilot pressure of valve changes to realize speed control to the heat radiation motor automatically with temperature.Because the pressure of system is higher, the pilot poppet valve of proportional pressure control valve need overcome induced pressure with very big electromagnetic push, and this just needs bigger electromagnet, is that cost increases.
Chinese patent 200310123304.9 discloses a kind of pressure proportional control valve, and it comprises: the valve body with inlet opening, delivery outlet and exhaust port; One is arranged on the valve body with the control valve unit of control with described open communication; And electromagnetic operating device that is used for driving this control valve unit.This control valve unit has first valve body, this first valve body have one be arranged on the communication chamber that is formed between inlet opening and the delivery outlet in the first valve portion that contacts of dividing plate; Second valve body, this second valve body has the valve portion that contacts with the second valve portion.The first valve portion of the diameter of the slidingsurface of first Sealing, first valve body is set to equate with the diameter of the contacting part of the second valve portion contacting point of first valve body with the diameter of the contacting part of the seat portion contacting point of dividing plate, the valve portion of second valve body.The diameter of the slidingsurface of second Sealing is set at bigger than the diameter of the slidingsurface of first Sealing.Along with system pressure increases, the electromagnetic push that proportional pressure control valve is used for the control outlet pressure also increases accordingly, so just need the volume of electromagnet to increase, and be used for the power that the electromagnet of control outlet pressure consumes and increase considerably, cause manufacture cost and operating cost to increase.
The model utility content
In order to overcome the shortcoming of prior art, the utility model provides that a kind of compact structure, fluid output pressure control range are big, low cost of manufacture and the low electric-hydraulic proportion pressure controlled valve of consumed power.
The purpose of this utility model is achieved through the following technical solutions: the electric-hydraulic proportion pressure controlled valve, it comprises main valve housing, the main valve plug assembly, spring, spring seat, guide's spool, valve pocket, valve seat, push rod, magnetic tube and electromagnetic coil, one end of main valve housing offers filler opening, the main valve plug assembly is sleeved on main valve housing inside, offer throttle orifice on the main valve plug assembly, be positioned on the inwall of main valve housing of main valve plug assembly one side and offer oil outlet, the opposite side of main valve housing is equipped with spring seat, be provided with spring between one side of spring seat and the main valve plug assembly, the opposite side of spring seat contacts cooperation with guide's spool, guide's spool is arranged at the recessed side of valve seat, be with valve pocket on the outer wall of valve seat, one end of valve pocket cooperates with main valve housing, the other end inside of valve pocket is provided with magnetic tube, one end of magnetic tube links to each other by push rod with guide's spool, the other end of magnetic tube links to each other with electromagnetic coil, guide's spool and inside offer center hole, form buffer cavity between valve seat and the magnetic tube, be positioned on guide's spool at buffer cavity place and offer the radial hole that is communicated with center hole; Axially offer at least two by-pass holes on the sidewall of valve seat, offer grooving on the main valve housing, by-pass hole, grooving and oil outlet are communicated with successively.
One side of described electromagnetic coil contacts with the end of valve pocket and links to each other, and the other end of electromagnetic coil is connected with the electromagnetic coil cap.
Also be provided with pad between described electromagnetic coil cap and the electromagnetic coil.
The sidewall of described electromagnetic coil is provided with wiring base.
The utlity model has following advantage:
1, adopt the outlet pressure of pilot valve convection cell to control, the difference of the area of leading type valve seat and leading type spool is very little, compact structure, and required electromagnetic push is very little.
When 2, disconnecting electric current, the fluid of filler opening is by main valve plug, guide's valve seat, push guide's spool open, because of no electromagnetic push, very little pressure just can be pushed guide's spool open, and the fluid from filler opening flows to oil outlet by the grooving on the main valve housing again through guide's valve seat and by-pass hole, main valve plug produces pressure difference because the fluid in guide loop flows, make its compression spring, open oil outlet, system is with very low pressure operation.During turn-on current, size according to electric current, electromagnetic coil produces corresponding thrust, promotes guide's spool and closes, when the thrust to guide's spool that produces when input pressure surpasses electromagnetic force, guide's spool is just opened, fluid flows to oil outlet from the grooving of by-pass hole on main valve housing, because fluid advances flowing of main valve plug, makes main valve plug produce pressure reduction, promote main valve plug and overcome spring force, open oil outlet.The pressure of system remains on the pressure corresponding with electromagnetic push.The size of input current, electromagnetic coil produces corresponding electromagnetic push, thereby controls different system's pilot pressures, and fluid outlet pressure control range is big.
3, axially have a center hole at leading type spool and push rod, have radial hole at the push rod sidewall, make a part of fluid that enters in the valve body enter buffer cavity, when the buffer cavity internal pressure increases, promote valve seat, promote the leading type spool by valve seat again, play the effect that further reduces electromagnetic push, therefore under identical thrust, the electromagnet size that the utility model adopts is littler, low cost of manufacture, and electromagnetic push is directly proportional with electric current, and the power that the equal thrust of the power ratio that consumes consumes is still less.
Description of drawings
Fig. 1 is structural representation of the present utility model
Among the figure: 1-main valve housing, 2-main valve plug assembly, 3-valve pocket, 4-spring seat, the 5-spring, 6-guide's spool, 7-push rod, 8-electromagnetic coil, the 9-magnetic tube, 10-buffer cavity, 11-center hole, 12-radial hole, the 13-filler opening, 14-oil outlet, 15-by-pass hole, 16-electromagnetic coil cap, 17-pad, 18-wiring base, the 19-valve seat, 20-grooving, 21-throttle orifice.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described, but protection domain of the present utility model is not limited to the following stated.
As shown in Figure 1, proportional pressure control valve, it comprises main valve housing 1, main valve plug assembly 2, spring 5, spring seat 4, guide's spool 6, valve pocket 3, valve seat 19, push rod 7, magnetic tube 9 and electromagnetic coil 8, one end of main valve housing 1 offers filler opening 13, main valve plug assembly 2 is sleeved on main valve housing 1 inside, offer a throttle orifice 21 on the main valve plug assembly 2, be positioned on the inwall of main valve housing 1 of main valve plug assembly 2 one sides and offer oil outlet 14, the opposite side of main valve housing 1 is equipped with spring seat 4, be provided with spring 5 between one side of spring seat 4 and the main valve plug assembly 2, the opposite side of spring seat 4 contacts cooperation with guide's spool 6, guide's spool 6 is arranged at the recessed side of valve seat 19, be with valve pocket 3 on the outer wall of valve seat 19, one end of valve pocket 3 cooperates with main valve housing 1, the other end inside of valve pocket 3 is provided with magnetic tube 9, one end of magnetic tube 9 links to each other by push rod 7 with leading type spool 6, the other end of magnetic tube 9 links to each other with electromagnetic coil 8, guide's spool 6 inside offer the center hole 11 of connection, form buffer cavity 10 between valve seat 19 and the magnetic tube 9, be positioned on guide's spool 6 at buffer cavity 10 places and offer the radial hole 12 that is communicated with center hole 11; Axially offer at least two by-pass holes 15 on the sidewall of valve seat 19; One side of electromagnetic coil 8 contacts with the end of valve pocket 3 and links to each other, and the other end of electromagnetic coil 8 is connected with electromagnetic coil cap 16; Also be provided with pad 17 between electromagnetic coil cap 16 and the electromagnetic coil 8; The sidewall of electromagnetic coil 8 is provided with wiring base 18.Offer grooving 20 on the main valve housing, the oil that grooving 20 connection oil outlets 14. come out from by-pass hole 15 is negotiable to oil outlet 14 by grooving 20.
Working procedure of the present utility model is as follows: fluid enters throttle orifice 21 on the valve core of main valve assembly 2 from filler opening 13, when the thrust that produces when input pressure can be opened guide's spool, fluid is from filler opening 13, through throttle orifice 21, the grooving 20 on the aperture on the spring seat and by-pass hole 15 and main valve housing 1 flows to oil outlet 14 again.Because fluid is through throttle orifice 21, the two ends of main valve plug assembly 2 produce pressure difference, thereby produce thrust to the right, overcome the thrust of spring 5, promote Spool assembly 2 and move to right, open oil outlet 14, make the pressure of filler opening 13 remain on certain value according to the size of electromagnetic push.Give electromagnetic coil 8 inputs different electric currents, just the pressure of corresponding different filler openings 3.The pressure of filler opening 13 is directly proportional with the electric current of input electromagnetic coil 8.When the thrust that guide's spool 6 is produced that electromagnetic push produces greater than oil-feed fluid, guide's spool 6 is closed, be cut off from the flow through fluid of main valve plug assembly 2 of filler opening 13, the two ends of main valve plug assembly 2 do not produce pressure difference, and main valve plug assembly 2 is closed oil outlet 14 under the effect of the pre-pressing force of spring 5.For the electromagnetic coil 8 required thrusts that provide are provided, be provided with center hole 11 in leading type spool 6 inside, formerly offer radial hole 12 on the sidewall of the end of guide valve core 6, fluid is through main valve plug assembly 2, the spring seat 4 of flowing through successively, center hole 11, radial hole 12, enter buffer cavity 10, fluid promotes valve seat 19 from the rear end of valve seat 19, valve seat 19 promotes spring seat 4 reaches, but the by-pass hole 15 on the valve seat 19 simultaneously forms the passage that a fuel feeding liquid flows out with grooving 20, fluid flows to the conical surface of leading type spool 6 from spring seat 4, through by-pass hole 15, grooving 20 flow to oil outlet 14, further controls oil outlet 14 outlet pressures.
Claims (4)
1. electric-hydraulic proportion pressure controlled valve, it is characterized in that: it comprises main valve housing (1), main valve plug assembly (2), spring (5), spring seat (4), guide's spool (6), valve pocket (3), valve seat (19), push rod (7), magnetic tube (9) and electromagnetic coil (8), one end of main valve housing (1) offers filler opening (13), main valve plug assembly (2) is sleeved on main valve housing (1) inside, offer throttle orifice (21) on the main valve plug assembly (2), be positioned on the inwall of main valve housing (1) of main valve plug assembly (2) one sides and offer oil outlet (14), the opposite side of main valve housing (1) is equipped with spring seat (4), be provided with spring (5) between one side of spring seat (4) and the main valve plug assembly (2), the opposite side of spring seat (4) contacts cooperation with guide's spool (6), guide's spool (6) is arranged at the recessed side of valve seat (19), be with valve pocket (3) on the outer wall of valve seat (19), one end of valve pocket (3) cooperates with main valve housing (1), the other end inside of valve pocket (3) is provided with magnetic tube (9), one end of magnetic tube (9) links to each other by push rod (7) with guide's spool (6), the other end of magnetic tube (9) links to each other with electromagnetic coil (8), guide's spool (6) and inside offer center hole (11), form buffer cavity (10) between valve seat (19) and the magnetic tube (9), be positioned on guide's spool (6) that buffer cavity (10) locates and offer the radial hole (12) that is communicated with center hole (11); Offer at least two by-pass holes (15) on the sidewall of valve seat (19), offer grooving (20) on the main valve housing (2), by-pass hole (15), grooving (20) and oil outlet (14) are communicated with successively.
2. electric-hydraulic proportion pressure controlled valve according to claim 1 is characterized in that: a side of described electromagnetic coil (8) contacts with the end face of valve pocket (3) and links to each other, and the other end of electromagnetic coil (8) is connected with electromagnetic coil cap (16).
3. electric-hydraulic proportion pressure controlled valve according to claim 2 is characterized in that: also be provided with pad (17) between described electromagnetic coil cap (16) and the electromagnetic coil (8).
4. electric-hydraulic proportion pressure controlled valve according to claim 1 and 2, it is characterized in that: the sidewall of described electromagnetic coil (8) is provided with wiring base (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320010372 CN203114766U (en) | 2013-01-09 | 2013-01-09 | Electric-hydraulic proportional pressure control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320010372 CN203114766U (en) | 2013-01-09 | 2013-01-09 | Electric-hydraulic proportional pressure control valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203114766U true CN203114766U (en) | 2013-08-07 |
Family
ID=48895116
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320010372 Expired - Fee Related CN203114766U (en) | 2013-01-09 | 2013-01-09 | Electric-hydraulic proportional pressure control valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203114766U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103075379A (en) * | 2013-01-09 | 2013-05-01 | 青神格林维尔流体动力控制技术有限公司 | Electric-hydraulic proportional pressure control valve |
-
2013
- 2013-01-09 CN CN 201320010372 patent/CN203114766U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103075379A (en) * | 2013-01-09 | 2013-05-01 | 青神格林维尔流体动力控制技术有限公司 | Electric-hydraulic proportional pressure control valve |
| CN103075379B (en) * | 2013-01-09 | 2015-05-27 | 青神格林维尔流体动力控制技术有限公司 | Electric-hydraulic proportional pressure control 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 |
Granted publication date: 20130807 Termination date: 20180109 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |