CN105545852B - High-speed switch pilot proportioning valve - Google Patents

High-speed switch pilot proportioning valve Download PDF

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Publication number
CN105545852B
CN105545852B CN201511011410.7A CN201511011410A CN105545852B CN 105545852 B CN105545852 B CN 105545852B CN 201511011410 A CN201511011410 A CN 201511011410A CN 105545852 B CN105545852 B CN 105545852B
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China
Prior art keywords
main valve
valve
speed switch
guide
speed
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CN201511011410.7A
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CN105545852A (en
Inventor
杨华勇
王双
张斌
钟麒
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Zhejiang University ZJU
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Zhejiang University ZJU
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/02Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
    • F16K11/06Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
    • F16K11/065Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
    • F16K11/07Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides

Abstract

The invention discloses a high-speed switch pilot proportioning valve. A valve element hole and a threaded hole are formed in a main valve body. A main valve element threaded plug, a main valve element, a reset spring check ring, a second reset spring, a first reset spring and a main valve element displacement sensor are sequentially installed. An oil inlet, working oil ports and an oil return port are formed in the bottom of the main valve body and are perpendicular to the valve element hole. A first pressure control cavity and a second pressure control cavity are formed in the two sides of the valve element hole. A pilot valve body is installed on one side of the main valve body. A first high-speed switch valve and a second high-speed switch valve are installed in parallel. The working oil ports of the two high-speed switch valves communicate with the first pressure control cavity and the second pressure control cavity through a first pilot working oil port and a second pilot working oil port respectively. According to the high-speed switch pilot proportioning valve, the two high-speed switch valves serve as a pilot, the position of the main valve element is fed back in real time through the main valve element displacement sensor, and the duty ratio of pulse-width modulation (PWM) signals of the two high-speed switch pilot valves is adjusted through a controller, so that the main valve outputs continuous and controllable pressure flow.

Description

A kind of speed-sensitive switch guide proportional valve
Technical field
The present invention relates to electro-hydraulic switching control element, more particularly, to a kind of speed-sensitive switch guide proportional valve.
Background technology
High-speed switch valve is to realize carrying out hydraulic system high speed, the Perfected process of high-precision control, in standard-sized sheet or complete Under the working condition closed, therefore the pressure loss is less, energy consumption is low, insensitive to oil contamination.Relative to traditional servo proportioning valve, ON/OFF digital signals directly can be changed into flow signal by high-speed switch valve so that it is straight that digital signal need not carry out D/A conversions Connect and combined with hydraulic system.However, high-speed switch valve is directly applied to into industrial quarters, also many problems need to solve.At a high speed Switch valve is in the moment for opening and closing, the pressure spike caused to system and flow pulsation.The motion of executor can not occur Discontinuous phenomenon.In addition, at present, for the research of high-speed switch valve is present, pressure rating is not high, and flow is relatively small to ask Topic.Therefore, it is that of Hydraulic Elements development is important by speed-sensitive switch valve technology in combination with guide's electro-hydraulic proportional control technology Direction.
, using high-speed switch valve as pilot stage, traditional proportional reversing valve is used as main for speed-sensitive switch guide proportional valve. Valve core of main valve is caused to produce continuous displacement by the pilot pressure of high speed, so as to export stable pressure flow.The program Implement, the structure of existing two grades of proportioning valves can be simplified so that manufacturing cost is substantially reduced.
The content of the invention
It is an object of the invention to provide a kind of speed-sensitive switch guide proportional valve, by two pilot stage speed-sensitive switches Valve, the feedback of valve core displacement sensor and guide's digital PWM control signal is carried with control to realize that main is continuous using main valve Pressure flow output.
To reach above-mentioned purpose, the technical solution used in the present invention is as follows:
The present invention includes main valve body, guide valve blocks, the first high-speed switch valve, the second high-speed switch valve, main valve plug screwed plug Head, main valve plug, main valve plug displacement transducer, back-moving spring back-up ring, (the first back-moving spring, second back-moving spring.
Main valve body center is provided with spool bore;The side of spool bore is provided with screwed hole, from the valve of the lateral opposite side of screwed hole one Main valve plug screw plug, main valve plug are installed successively in core bore, towards outside the main valve plug small end of opposite side, back-moving spring is sequentially arranged with Back-up ring, second back-moving spring, the (the first back-moving spring being enclosed within outside second back-moving spring and main valve plug displacement transducer, main valve plug position The small end of displacement sensor is mounted in main valve core bore, and second pressure control chamber is formed between main valve plug small end and main valve body;Spool bore Radial and axial to have first pressure control chamber and pressure controling hole, first pressure control chamber is connected with pressure controling hole; Oil-in, actuator port and oil return opening are opened in successively main valve body bottom, vertical with spool bore respectively;Guide valve blocks are arranged on main valve The second pressure control chamber side of body, has been mounted side by side the first high-speed switch valve and the second high-speed switch valve before guide valve blocks, Its installation direction is vertical with main valve plug installation direction, guide valve blocks on be provided with first guide's actuator port and the second guide work Hydraulic fluid port, actuator port Jing the first guide actuator ports of the first high-speed switch valve are connected with pressure controling hole, the second speed-sensitive switch Actuator port Jing the second guide actuator ports of valve are connected with second pressure control chamber.
First high-speed switch valve and the second high-speed switch valve are installed in the homonymy of main valve body.
The main valve plug displacement transducer is LVDT displacement transducers.
First high-speed switch valve and the second high-speed switch valve are realized controlling by pwm signal.
The invention has the advantages that:
1) cost of two grades of electro-hydraulic proportional valves is reduced as pilot stage control bound using two high-speed switch valves.Together When, because high-speed switch valve is only operated in two states of ON/OFF, therefore the sensitivity to fluid is reduced.
2) control of high-speed switch valve directly adopts pwm signal, convenient and control machine and intercomputer digital communication.
3) outward appearance is consistent with traditional reversal valve with installation dimension, convenient with conventional valve can replace.
Description of the drawings
Fig. 1 is the appearance schematic diagram of the present invention.
Fig. 2 is the structure cross-sectional schematic of the present invention.
Fig. 3 is the main valve body exploded perspective view of the present invention.
Fig. 4 is the guide valve blocks exploded perspective view of the present invention.
In figure:1st, main valve body, 2, guide valve blocks, the 3, first high-speed switch valve, the 4, second high-speed switch valve, 5, main valve plug spiral shell Stricture of vagina plug, 6, main valve plug, 7, main valve plug displacement transducer, 8, back-moving spring back-up ring, 9, (the first back-moving spring, 10, second resets Spring.
Specific embodiment
With reference to the accompanying drawings and examples the invention will be further described.
As shown in Figure 1, Figure 2, Figure 3, Figure 4, the present invention includes main valve body 1, guide valve blocks 2, the first high-speed switch valve 3, the second high-speed switch valve 4, main valve plug screw plug 5, main valve plug 6, main valve plug displacement transducer 7, back-moving spring back-up ring 8, the One back-moving spring 9, second back-moving spring 10;
The center of main valve body 1 is provided with spool bore 1-1;The side of spool bore 1-1 is provided with screwed hole, lateral another from screwed hole one Main valve plug screw plug 5, main valve plug 6 is installed successively, towards outside the small end of main valve plug 6 of opposite side, successively in spool bore 1-1 of side Equipped with back-moving spring back-up ring 8, second back-moving spring 10, the (the first back-moving spring 9 being enclosed within outside second back-moving spring 10 and main valve plug Displacement transducer 7, the small end of main valve plug displacement transducer 7 is mounted in the hole of main valve plug 6, is formed between the small end of main valve plug 6 and main valve body 1 Second pressure control chamber 1-3;The radial and axial of spool bore 1-1 has first pressure control chamber 1-2 and pressure controling hole 1-7, first pressure control chamber 1-2 is connected with pressure controling hole 1-7;Oil-in 1-4, actuator port 1-5 and oil return opening 1-6 are successively The bottom of main valve body 1 is opened in, it is vertical with spool bore 1-1 respectively;Guide valve blocks 2 are arranged on second pressure control chamber 1-3 of main valve body 1 Side, guide valve blocks 2 have above been mounted side by side the first high-speed switch valve 3 and the second high-speed switch valve 4, its installation direction and main valve The installation direction of core 6 is vertical, is provided with first guide's actuator port 2-1 and the second guide actuator port 2-2 on guide valve blocks 2, and first Actuator port Jing the first guide actuator port 2-1 of high-speed switch valve 3 are connected with pressure controling hole 1-7, the second high-speed switch valve 4 Actuator port Jing the second guide actuator port 2-2 be connected with second pressure control chamber 1-3.
As shown in Fig. 2, state 4, first high-speed switch valve 3 is installed in the same of main valve body 1 with the second high-speed switch valve 4 Side, the first high-speed switch valve 3 and the second high-speed switch valve 4 are realized controlling by pwm signal.
The main valve plug displacement transducer 7 is LVDT displacement transducers.
With reference to the work process for shown in Fig. 1, Fig. 2, illustrating the present invention:
The pressure oil of pump discharge enters main valve body 1 by the oil-in 1-4 of main valve body 1.First high-speed switch valve 3 and second High-speed switch valve 4 receives the pwm signal control of controller and enters first guide's actuator port 2-1 and the second guide actuator port 2- 2 guide's oil pressure and flow.First guide's actuator port 2-1 and the second guide actuator port 2-2 are respectively communicated to pressure control Drilling 1-7 and second pressure control chamber 1-3, first pressure control chamber 1-2 is connected with pressure controling hole 1-7.By such oil Road connects, and first pressure control chamber 1-2 at the two ends of main valve plug 6 is with the pressure of second pressure control chamber 1-3 by the first speed-sensitive switch Valve 3 is determined with the second high-speed switch valve 4.When the dutycycle and the high-speed switch valve for selecting work of adjustment pwm signal, main valve is determined Hydraulic coupling suffered by the two ends of core 6.(the first back-moving spring 9 is used to balance the hydraulic coupling of first pressure control chamber 1-2, the second reset bullet Spring 10 is used to balance the pressure of second pressure control chamber 1-3.Via the balance of guide's hydraulic coupling, hydraulic power and spring force so that Main valve plug 6 produces the displacement of fixation.
When first pressure control chamber 1-2 is equal with the pressure of second pressure control chamber 1-3, main valve plug 6 is in middle position, work Hydraulic fluid port 1-5 is not connected with oil-in 1-4, oil return opening 1-6.
When the pressure of first pressure control chamber 1-2 is more than second pressure control chamber 1-3 pressure, hydraulic power and the first reset bullet The spring force sum of spring 9, main valve plug 6 is moved to the left, and actuator port 1-5 is connected with oil return opening 1-6, and hydraulic oil is from actuator port 1-5 It flow to oil return opening 1-6, system oil return.
When the pressure of second pressure control chamber 1-3 is more than first pressure control chamber 1-2 pressure, hydraulic power and the second reset bullet The spring force sum of spring 10, main valve plug 6 moves right, and actuator port 1-5 is connected with oil-in 1-4, and hydraulic oil flows from oil-in 1-4 To actuator port 1-5, system oil-feed.
Main valve plug displacement transducer 7 detects the position of main valve plug 6, feeds back to controller.Controller adjusts the first high speed and opens The pwm control signal of the high-speed switch valve 4 of valve 3 and second is closed so that it is determined that the displacement of main valve plug 6, connects from actuator port 1-5 outputs Continuous adjustable pressure, flow.
Above-mentioned specific embodiment is used for illustrating the present invention, rather than limits the invention, the present invention's In spirit and scope of the claims, any modifications and changes made to the present invention both fall within the protection model of the present invention Enclose.

Claims (4)

1. a kind of speed-sensitive switch guide proportional valve, it is characterised in that:Including main valve body(1), guide valve blocks(2), the first high speed opens Close valve(3), the second high-speed switch valve(4), main valve plug screw plug(5), main valve plug(6), main valve plug displacement transducer(7), it is multiple Position check ring(8), (the first back-moving spring(9), second back-moving spring(10);
Main valve body(1)Center is provided with spool bore(1-1);Spool bore(1-1)Side be provided with screwed hole, it is lateral another from screwed hole one The spool bore of side(1-1)Main valve plug screw plug is inside installed successively(5), main valve plug(6), towards the main valve plug of opposite side(6) Outside small end, back-moving spring back-up ring is sequentially arranged with(8), second back-moving spring(10), be enclosed within second back-moving spring(10)Outer first Back-moving spring(9)With main valve plug displacement transducer(7), main valve plug displacement transducer(7)Small end be mounted in main valve plug(6)In hole, Main valve plug(6)Small end and main valve body(1)Between formed second pressure control chamber(1-3);Spool bore(1-1)Radial and axial difference It is provided with first pressure control chamber(1-2)And pressure controling hole(1-7), first pressure control chamber(1-2)With pressure controling hole(1-7) Connection;Oil-in(1-4), actuator port(1-5)And oil return opening(1-6)Main valve body is opened in successively(1)Bottom, respectively with spool bore (1-1)Vertically;Guide valve blocks(2)Installed in main valve body(1)Second pressure control chamber(1-3)Side, guide valve blocks(2)Above The first high-speed switch valve has been mounted side by side(3)With the second high-speed switch valve(4), the first high-speed switch valve(3)Open with the second high speed Close valve(4)Installation direction and main valve plug(6)Installation direction is vertical, guide valve blocks(2)On be provided with first guide's actuator port(2-1) With second guide's actuator port(2-2), the first high-speed switch valve(3)Actuator port Jing the first guide actuator ports(2-1)With Pressure controling hole(1-7)Connection, the second high-speed switch valve(4)Actuator port Jing the second guide actuator ports(2-2)With second Pressure control cavity(1-3)Connection.
2. a kind of speed-sensitive switch guide proportional valve according to claim 1, it is characterised in that:First high-speed switch valve (3)With the second high-speed switch valve(4)It is installed in main valve body(1)Homonymy.
3. a kind of speed-sensitive switch guide proportional valve according to claim 1, it is characterised in that:The main valve plug displacement sensing Device(7)For LVDT displacement transducers.
4. a kind of speed-sensitive switch guide proportional valve according to claim 1, it is characterised in that:First high-speed switch valve (3)With the second high-speed switch valve(4)Realize controlling by pwm signal.
CN201511011410.7A 2015-12-30 2015-12-30 High-speed switch pilot proportioning valve Active CN105545852B (en)

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Application Number Priority Date Filing Date Title
CN201511011410.7A CN105545852B (en) 2015-12-30 2015-12-30 High-speed switch pilot proportioning valve

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Application Number Priority Date Filing Date Title
CN201511011410.7A CN105545852B (en) 2015-12-30 2015-12-30 High-speed switch pilot proportioning valve

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CN105545852B true CN105545852B (en) 2017-05-17

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Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105822795B (en) * 2016-05-23 2018-11-13 浙江工业大学 The electro-hydraulic high-speed switch valves of chute type 2D with variable ratio transmission mechanism
CN106762909B (en) * 2016-12-29 2018-07-24 浙江大学 A kind of hydraulic multitandem valve and its control method of high-speed switch valve pilot control
CN107339275A (en) * 2017-08-22 2017-11-10 谭振达 A kind of high speed digital switches pilot valve
CN108757621A (en) * 2018-08-14 2018-11-06 三河沃达液压控制系统有限公司 Indirect control formula digital servo valve
CN109236775A (en) * 2018-09-29 2019-01-18 南京航空航天大学 A kind of big flow ratio valve module and its control method based on high-speed switch valve guide adjusting
CN112196852A (en) * 2020-07-16 2021-01-08 浙江工业大学 Digital fluid pilot-driven double-spool programmable control hydraulic valve and control method thereof

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3307215A1 (en) * 1982-04-30 1983-11-03 Aida Engineering, Ltd., Sagamihara, Kanagawa SWITCH VALVE
SU1442716A2 (en) * 1986-04-25 1988-12-07 Марийский политехнический институт им.А.М.Горького Hydraulic drive
CN1272600A (en) * 2000-05-12 2000-11-08 西南交通大学 High-speed numerical control proportion valve
CN1936343A (en) * 2006-10-16 2007-03-28 太原理工大学 Guide proportion directional throttle valve
CN101275467A (en) * 2008-04-17 2008-10-01 北京天地玛珂电液控制系统有限公司 High pressure rising pole control valve and high pressure original supporting system with high-pressure pump
CN201209679Y (en) * 2008-04-18 2009-03-18 山东泰丰液压设备有限公司 Proportional guide servo control fully-active throttle cartridge valve
CN102121487A (en) * 2011-03-04 2011-07-13 华中科技大学 Pilot-operated type water hydraulic pressure digital proportional direction valve

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3307215A1 (en) * 1982-04-30 1983-11-03 Aida Engineering, Ltd., Sagamihara, Kanagawa SWITCH VALVE
SU1442716A2 (en) * 1986-04-25 1988-12-07 Марийский политехнический институт им.А.М.Горького Hydraulic drive
CN1272600A (en) * 2000-05-12 2000-11-08 西南交通大学 High-speed numerical control proportion valve
CN1936343A (en) * 2006-10-16 2007-03-28 太原理工大学 Guide proportion directional throttle valve
CN101275467A (en) * 2008-04-17 2008-10-01 北京天地玛珂电液控制系统有限公司 High pressure rising pole control valve and high pressure original supporting system with high-pressure pump
CN201209679Y (en) * 2008-04-18 2009-03-18 山东泰丰液压设备有限公司 Proportional guide servo control fully-active throttle cartridge valve
CN102121487A (en) * 2011-03-04 2011-07-13 华中科技大学 Pilot-operated type water hydraulic pressure digital proportional direction valve

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