WO2020093869A1 - Vanne proportionnelle à base d'eau et son procédé de commande - Google Patents

Vanne proportionnelle à base d'eau et son procédé de commande Download PDF

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Publication number
WO2020093869A1
WO2020093869A1 PCT/CN2019/112708 CN2019112708W WO2020093869A1 WO 2020093869 A1 WO2020093869 A1 WO 2020093869A1 CN 2019112708 W CN2019112708 W CN 2019112708W WO 2020093869 A1 WO2020093869 A1 WO 2020093869A1
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WIPO (PCT)
Prior art keywords
valve
main valve
main
return
spool
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Application number
PCT/CN2019/112708
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English (en)
Chinese (zh)
Inventor
廖瑶瑶
柴玮锋
廉自生
董建麟
刘可
李成
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太原理工大学
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Application filed by 太原理工大学 filed Critical 太原理工大学
Publication of WO2020093869A1 publication Critical patent/WO2020093869A1/fr

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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
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors

Definitions

  • the invention relates to a proportional valve used in a hydraulic support electro-hydraulic control system, in particular to a water-based proportional valve and its control method.
  • the hydraulic support is the key supporting equipment for the fully mechanized coal mining face. At present, it completely relies on the operation of the switch-type electro-hydraulic directional valve for lifting, lowering, pushing, and moving. Due to the large support inertia and the support itself, the switch-type electro-hydraulic replacement When the directional valve changes direction quickly, the sudden flow change will cause huge hydraulic shock, cause equipment and pipeline vibration, generate noise, and even cause damage to hydraulic components and systems, seriously affecting production. As the thickness of the coal seam becomes higher and the flow rate of the system increases, this hydraulic shock problem becomes more and more prominent. In addition, in order to ensure the support effect, it is often necessary to adjust the attitude of the hydraulic support.
  • the required flow rate is extremely small, but the flow of the switch-type electro-hydraulic directional valve is large and uncontrollable when it is started, and it cannot guarantee the accurate adjustment of the support posture. Therefore, there is an urgent need for an electro-hydraulic proportional valve that can be applied to hydraulic supports and can adjust the flow rate.
  • the flow rate is adjusted by controlling the opening and closing process of the valve core, and the purpose of reducing hydraulic shock is achieved.
  • the current proportional valves mostly use proportional electromagnets as electro-mechanical converters to drive the spool.
  • proportional electromagnet force and the stroke due to the contradictory relationship between the proportional electromagnet force and the stroke, it is difficult to perform large flow (large stroke) proportional control.
  • the present invention proposes a large-flow water-based proportional valve and its control method to solve the problem of precisely adjusting the posture of the hydraulic support under the coal mine and reducing the hydraulic shock.
  • the present invention provides a water-based proportional valve and its control method.
  • a water-based proportional valve including a water-based proportional valve structure and a test control part
  • the water-based proportional valve structure includes a main valve inlet valve sleeve, a main valve spring, a main valve seat, a main valve return Liquid spool, main valve inlet spool, main valve sleeve, main valve return valve sleeve, pilot valve inlet spool spring, pilot valve inlet spool spring seat, pilot valve inlet ball valve, pilot valve inlet valve Seat, pilot valve return spool spring, pilot valve return spool, check valve, two-position two-way solenoid switch valve, ejector rod, L-shaped drive rod, screw nut mechanism and DC servo motor.
  • a main valve inlet valve sleeve is installed on the main valve seat, a main valve spring is arranged between the main valve inlet valve sleeve and the main valve seat, the main valve inlet valve core and the main valve seat rely on a plane seal ,
  • the main valve inlet valve core is provided with a triangular throttle window, the main valve inlet valve core is arranged in the main valve sleeve, and forms a main valve control cavity with the main valve sleeve, the main valve sleeve and the main valve return valve sleeve pass Screw connection, and form a return cavity with the main valve return valve sleeve,
  • the main valve return valve sleeve is provided with a hole e communicating with the return cavity, the hole e communicates with the return port O;
  • the main valve sleeve is provided with the main valve
  • the hole f communicating with the control chamber is also provided with a hole g that communicates with the left end of the main valve return s
  • a check valve and a two-position two-way electromagnetic switch valve are sequentially connected between the hole f and the return port O, and the hole g Connect to the outlet of the check valve.
  • the combined use of one-way valve and two-position two-way electromagnetic switch valve can make the return valve core of the main valve always be in the sealed state to the right during the return process of the proportional valve. If f and g are directly connected, it will cause the high and low pressure of the proportional valve. Short circuit (that is, the P port and the O port are connected) cannot work.
  • the pilot valve inlet ball valve, the pilot valve inlet spool spring seat, and the pilot valve inlet spool spring are installed in the pilot valve inlet valve seat in order from left to right, forming a whole, which is concentrically installed to the main The valve inlet spool; the right end of the ejector rod is inserted into the inlet valve seat of the pilot valve, and there is a single gap between the ejector rod and the inlet valve seat of the pilot valve; the left end of the ejector rod is connected to the L-shaped drive rod by threads
  • the L-shaped drive rod is installed on the main valve return valve sleeve, the L-shaped drive rod passes through the main valve return valve sleeve and forms a dynamic seal pair, and the left end of the L-shaped drive rod is connected to the screw nut mechanism through threads,
  • the screw nut mechanism is driven by a DC servo motor; the L-shaped drive rod is provided with a through groove, the left side of the pilot valve return valve core is
  • the right side of the pilot valve return spool is installed in the main valve sleeve and forms a sliding seal with it.
  • the rightmost end of the pilot valve return spool is provided with a tapered surface Structure or spherical structure, cone structure or spherical structure and main valve inlet spool The groove edge on the end surface forms a line seal.
  • the pilot valve return valve core has a central hole for the liquid in the main valve control chamber to pass through, and then returns to the return port O through the hole e on the main valve return valve sleeve
  • a pilot valve return valve core spring is installed between the main valve return valve sleeve and the left shoulder of the pilot valve return valve core; the left end of the main valve inlet valve core is provided with an annular groove b, the main valve sleeve
  • test control part includes a speed sensor, an amplifier, a controller and a pressure sensor, a speed sensor is provided between the DC servo motor and the screw nut mechanism, the pressure sensor is provided at the outlet A of the proportional valve, and the pressure sensor is connected to the controller, The controller is connected to the amplifier, and the amplifier is connected to the DC servo motor.
  • the unilateral gap between the ejector rod and the inlet valve seat of the pilot valve is 1 mm.
  • a test control method for a water-based proportional valve The speed sensor detects the speed of the output shaft of the DC servo motor, and the output displacement is obtained by integrating the speed.
  • the active control of the speed of the servo motor is realized by the controller to control the proportional valve.
  • the position of the core is provided with a pressure sensor at the outlet A of the proportional valve.
  • the present invention has the following beneficial effects:
  • pilot inlet valve and pilot return valve are integrated into the main valve inlet spool, which not only can form a position following system, but also reduce the volume and save the downhole space.
  • the traditional electro-hydraulic proportional valve is driven by a proportional electromagnet.
  • the proportional electromagnet generates severe heat during the holding phase, and the control stroke is short and the control flow is small.
  • the invention adopts a DC servo motor and a screw nut mechanism, and the holding stage is completed by the screw nut mechanism self-locking, and there is no need to supply power to the DC servo motor. This stage can save more than 50% of energy.
  • the invention forms a position following system, the control stroke is not affected, and the control flow range is large.
  • the present invention can not only actively control the position / speed of the spool in the opening and closing phase, but also passively control the load pressure interference in the holding phase, that is, the position / pressure dual feedback controls the flow rate and reduces the hydraulic shock.
  • water-based fluid is used as the transmission medium, and it can also be replaced by pure water medium transmission, which is convenient for realizing pollution-free production underground.
  • Figure 1 is a structural diagram of the present invention
  • 1-main valve inlet valve sleeve 2-main valve spring, 3-main valve seat, 4-main valve return spool, 5-main valve inlet spool, 6-pilot valve inlet spool Spring, 7-Pilot Valve Inlet Spool Spring Seat, 8-Pilot Valve Inlet Ball Valve, 9-Pilot Valve Inlet Valve Seat, 10-Push Rod, 11-Main Valve Return Valve Sleeve, 12-L Drive Rod , 13-screw nut mechanism, 14-speed sensor, 15-DC servo motor, 16-amplifier, 17-controller, 18-pressure sensor, 19-pilot valve return spool spring, 20-pilot valve return valve Core, 21-main valve sleeve, 22-one-way valve, 23-two-position two-way solenoid switch valve, P-inlet, O-return port, A-work port.
  • a water-based proportional valve includes a water-based proportional valve structure and a test control part.
  • the water-based proportional valve structure includes a main valve inlet valve sleeve 1, a main valve spring 2, a main valve seat 3, a main valve Valve return spool 4, main valve inlet spool 5, main valve sleeve 21, main valve return valve sleeve 11, check valve 22, two-position two-way solenoid switch valve 23, pilot valve inlet spool spring 6 , Pilot valve inlet spool spring seat 7, pilot valve inlet ball valve 8, pilot valve inlet valve seat 9, pilot valve return spool spring 19, pilot valve return spool 20, ejector rod 10, L-shaped drive Rod 12, screw nut mechanism 13 and DC servo motor 15.
  • a main valve inlet valve sleeve 1 is installed on the main valve seat 3, a main valve spring 2 is arranged between the main valve inlet valve sleeve 1 and the main valve seat 3, the main valve inlet valve core 5 and the main valve
  • the valve seat 3 relies on plane sealing.
  • the main valve inlet spool 5 is provided with a triangular throttle window.
  • the main valve inlet spool 5 is arranged in the main valve sleeve 21 and forms the main valve control cavity with the main valve sleeve 21.
  • the valve sleeve 21 and the main valve return valve sleeve 11 are connected by a thread, and a return cavity is formed between the two.
  • the main valve return valve sleeve 11 is provided with a hole e communicating with the return cavity, and the hole e is in communication with the return port O
  • the main valve sleeve 21 is provided with a hole f communicating with the main valve control chamber, and a channel g communicating with the left end of the main valve return spool 4 is provided, and a one-way valve 22 is sequentially connected between the hole f and the return port O And two-position two-way electromagnetic switch valve 23, and the channel g is connected to the right end outlet of the check valve 22 (also the inlet of the two-position two-way electromagnetic switch valve 23).
  • the pilot valve inlet ball valve 8, the pilot valve inlet spool spring seat 7, the pilot valve inlet spool spring 6 are installed in the pilot valve inlet valve seat 9 from left to right, forming a whole, which is concentric Installed into the main valve inlet spool 5; the right end of the ejector rod 10 is inserted into the inlet valve seat 9 of the pilot valve, and there is a single gap between the ejector rod 10 and the inlet valve seat 9 of the pilot valve; The left end is connected to the L-shaped drive rod 12 by means of threads.
  • the L-shaped drive rod 12 is installed on the main valve return valve sleeve 11. The L-shaped drive rod 12 passes through the main valve return valve sleeve 11 and forms a dynamic seal pair therewith.
  • the left end of the L-shaped drive rod 12 is connected to the screw nut mechanism 13 through threads, and the screw nut mechanism 13 is driven by the DC servo motor 15; the L-shaped drive rod 12 is provided with a through groove, and the pilot valve returns the spool 20 There is a shoulder on the left side, and the shoulder is installed in the groove of the L-shaped driving rod 12, the groove restricts the pilot valve return spool 20, and the right side of the pilot valve return spool 20 is installed on the main A sliding seal pair is formed in the valve sleeve 21, and the rightmost end of the pilot valve return spool 20 is provided with a tapered surface structure or a spherical structure.
  • the spherical structure forms a line seal with the groove edge on the left end surface of the main valve inlet spool 5, and the pilot valve return spool 20 has a central hole for the passage of the liquid in the main valve control chamber, and then returns the liquid through the main valve
  • the hole e on the valve sleeve 11 returns to the return port O;
  • the pilot valve return valve spool spring 19 is installed between the main valve return valve sleeve 11 and the left shoulder of the pilot valve return valve core 20;
  • the left end of the inlet valve core 5 is provided with an annular groove b with a groove width of 8.5 mm.
  • the main valve sleeve 21 is provided with a small hole a.
  • the annular groove b communicates with the small hole a, and the main valve inlet valve core 5 is When moving in the full range of left and right, the annular groove b can completely cover the position of the small hole a.
  • the test control part includes a speed sensor 14, an amplifier 16, a controller 17, and a pressure sensor 18.
  • a speed sensor 14 is provided between the DC servo motor 15 and the screw nut mechanism 13, and the pressure sensor 18 is provided at the outlet A of the proportional valve.
  • the pressure sensor 18 is connected to the controller 17, the controller 17 is connected to the amplifier 16, and the amplifier 16 is connected to the DC servo motor 15.
  • the DC servo motor 15 serves as an electro-mechanical converter to drive the lead screw to rotate, and the nut performs linear movement.
  • high-pressure liquid enters the main valve control chamber along the annular gap between the inlet valve seat 9 of the pilot valve and the ejector rod 10, and the liquid flows through the hole f and the one-way valve 22 (at this time, the two-position two-way electromagnetic Switch valve 23 is closed), and then through the channel g to the left end of the main valve return spool 4, first push the main valve return spool 4 to the right, close the main spool return port O, and then push the main valve inlet spool 5 To the right, the throttle window of the main valve inlet spool opens until the port of the pilot valve inlet ball valve 8 is closed again.
  • the screw nut 13 keeps moving to the right, the main valve inlet spool 5 keeps moving to the right, how much the jack 10 and the pilot valve inlet ball valve 8 move to the right, the main valve inlet spool 5 will follow to the right How much distance to move, but the movement of the main spool 5 lags behind the pilot valve inlet ball valve 8, so that asynchronous follow-up is achieved.
  • the right end cone surface of the pilot valve return spool 20 is always close to the groove of the left end surface of the main valve inlet spool 5 under the action of the spring force of the pilot valve return spool spring 19, so that the pilot valve returns liquid
  • the valve port is always closed, so that the pilot valve return spool 20 follows the movement of the main valve inlet spool 5 synchronously.
  • the DC servo motor 15 drives the screw nut 13 and the L-shaped drive rod 12 to move to the left, the pilot valve return spool 20 and the ejector rod 10 move left synchronously under the action of the L-shaped drive rod 12, and the pilot valve returns
  • the right end cone surface of the liquid spool 20 is separated from the groove on the left end surface of the main valve inlet spool 5, the pilot valve return valve port is opened, the main valve control chamber liquid communicates with the return port O, and the main valve inlet valve core 5 moves to the left.
  • the groove edge of the left end face of the main valve inlet spool 5 closely abuts the conical surface of the right end of the pilot valve return spool 20, the process is repeated continuously.
  • the pilot valve inlet ball valve 8 and the main valve inlet spool 5 form an interstage mechanical feedback.
  • the pilot valve return spool 20 and the main valve inlet spool 5 form an interstage Mechanical feedback.
  • the pressure sensor 18 feeds back the load pressure to compensate the flow change caused by the load change.
  • a test control method for a water-based proportional valve The rotation speed sensor 14 detects the rotation speed of the output shaft of the DC servo motor 15 and the output displacement is obtained by integrating the rotation speed.
  • the controller 17 realizes active control of the rotation speed of the servo motor 15, thereby To control the position of the proportional valve spool, a pressure sensor 18 is provided at the outlet A of the proportional valve.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electrically Driven Valve-Operating Means (AREA)
  • Servomotors (AREA)
  • Fluid-Driven Valves (AREA)

Abstract

L'invention concerne une vanne proportionnelle à base d'eau pour un système de commande électrohydraulique de support hydraulique. La vanne proportionnelle à base d'eau comprend une structure de vanne proportionnelle à base d'eau et une partie de commande de test ; la structure de vanne proportionnelle à base d'eau comprend un manchon de soupape d'admission de liquide de soupape principal (1), un ressort de soupape principal (2), un siège de soupape principal (3), un noyau de soupape de retour de liquide de soupape principal (4), un noyau de soupape d'admission de liquide de soupape principal (5), un manchon de soupape principal (21), un manchon de soupape de retour de liquide de soupape principal (11), une soupape unidirectionnelle (22), une vanne de commutation électromagnétique à deux positions et deux voies (23), un ressort de noyau de soupape d'admission de liquide de soupape pilote (6), un siège de ressort de noyau de soupape d'admission de liquide de soupape pilote (7), un robinet à tournant sphérique d'admission de liquide de soupape pilote (8), un siège de soupape d'admission de liquide de soupape pilote (9), un ressort de noyau de soupape de retour de liquide de soupape pilote (19), un noyau de soupape de retour de liquide de soupape pilote (20), une tige d'éjecteur (10), une tige d'entraînement en forme de L (12), un mécanisme vis-écrou et écrou (13), et un servo-moteur à courant continu (15). L'invention concerne également un procédé de commande de la vanne proportionnelle à base d'eau pour un système de commande électrohydraulique de support hydraulique. Un réglage de posture précis de support hydraulique de mine de charbon souterrain et une réduction d'impact hydraulique sont obtenus.
PCT/CN2019/112708 2018-11-09 2019-10-23 Vanne proportionnelle à base d'eau et son procédé de commande WO2020093869A1 (fr)

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CN201811330728.5 2018-11-09
CN201811330728.5A CN109555740B (zh) 2018-11-09 2018-11-09 一种水基比例阀及其控制方法

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Publication number Priority date Publication date Assignee Title
CN109555740B (zh) * 2018-11-09 2020-02-04 太原理工大学 一种水基比例阀及其控制方法
CN111894924B (zh) * 2020-06-19 2022-05-24 太原理工大学 手自一体控制的高水基高压大流量数字比例方向阀

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CN109555740A (zh) * 2018-11-09 2019-04-02 太原理工大学 一种水基比例阀及其控制方法

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US4567914A (en) * 1981-08-03 1986-02-04 General Electric Company Two-stage hydraulic solenoid valve
CN202056128U (zh) * 2011-03-04 2011-11-30 华中科技大学 先导型水液压数字比例方向阀
CN102352874B (zh) * 2011-10-31 2013-12-25 浙江大学 数字式纯水液压比例溢流阀
CN105114387A (zh) * 2015-09-18 2015-12-02 海门市油威力液压工业有限责任公司 大流量数字二通插装式三级伺服比例节流阀
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1375641A (zh) * 2001-03-15 2002-10-23 Dbt有限公司 电液控制装置
WO2005040618A1 (fr) * 2003-10-20 2005-05-06 Marco Systemanalyse Und Entwicklung Gmbh Soupape a cartouche precommandee pouvant etre commandee par voie electromagnetique et presentant un systeme d'actionnement manuel d'urgence
CN2705646Y (zh) * 2003-12-17 2005-06-22 温州市基安机械有限公司 先导液控换向阀组
CN201037424Y (zh) * 2006-11-13 2008-03-19 浙江丰隆液压元件有限公司 液压支架用电液控换向阀
CN203515637U (zh) * 2013-09-05 2014-04-02 浙江长河机械制造有限公司 一种液压支架用液控单向阀
CN104675423A (zh) * 2015-02-06 2015-06-03 太原理工大学 一种双通道千升级大流量换向阀
CN109555740A (zh) * 2018-11-09 2019-04-02 太原理工大学 一种水基比例阀及其控制方法

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