WO2011072502A1 - Integrated electro-hydraulic actuator - Google Patents

Integrated electro-hydraulic actuator Download PDF

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Publication number
WO2011072502A1
WO2011072502A1 PCT/CN2010/070802 CN2010070802W WO2011072502A1 WO 2011072502 A1 WO2011072502 A1 WO 2011072502A1 CN 2010070802 W CN2010070802 W CN 2010070802W WO 2011072502 A1 WO2011072502 A1 WO 2011072502A1
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WO
WIPO (PCT)
Prior art keywords
valve
hydraulic
port
cylinder
valves
Prior art date
Application number
PCT/CN2010/070802
Other languages
French (fr)
Chinese (zh)
Inventor
刘宝军
刘江
郑学明
张涛
雷利
聂强
Original Assignee
沈阳东北电力调节技术有限公司
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Publication of WO2011072502A1 publication Critical patent/WO2011072502A1/en

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Classifications

    • 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
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/18—Combined units comprising both motor and pump
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/20507—Type of prime mover
    • F15B2211/20515—Electric motor
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/2053—Type of pump
    • F15B2211/20561—Type of pump reversible
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/27—Directional control by means of the pressure source
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30505—Non-return valves, i.e. check valves
    • F15B2211/3051—Cross-check valves
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/505—Pressure control characterised by the type of pressure control means
    • F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
    • F15B2211/50518—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using pressure relief valves
    • F15B2211/50527—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using pressure relief valves using cross-pressure relief valves
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/61—Secondary circuits
    • F15B2211/611—Diverting circuits, e.g. for cooling or filtering
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/63—Electronic controllers
    • F15B2211/6303—Electronic controllers using input signals
    • F15B2211/6336—Electronic controllers using input signals representing a state of the output member, e.g. position, speed or acceleration
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7051—Linear output members
    • F15B2211/7053—Double-acting output members
    • F15B2211/7054—Having equal piston areas

Definitions

  • the present invention relates to an actuator for driving and controlling the operation of valves, dampers, etc., said actuator being an electro-hydraulic actuator, said operation being the opening, closing or holding of a valve or damper. It is widely used in electric power, metallurgy, petrochemical, pipeline and other industries.
  • the current electro-hydraulic actuator hydraulic drive system is mainly composed of a one-way hydraulic pump, a hydraulic valve, a fuel tank and a hydraulic cylinder connected by an oil pipeline.
  • the AC motor drives the hydraulic pump.
  • the position control of the hydraulic cylinder is controlled by an electro-hydraulic servo valve or electro-hydraulic
  • a control loop consisting of a proportional valve, and a position sensor is implemented. It can be seen that the system is composed of several equipments connected by oil pipelines. Each equipment exists separately, the floor space is large, the system is large and complicated, and the maintenance work is more.
  • the fuel tank is open, and the fuel tank is connected to the atmosphere through the breathing port.
  • an object of the present invention is to provide an integrated electro-hydraulic actuator.
  • the object of the invention is achieved in that: the two inlets of the hydraulic locking valve block with the locked hydraulic cylinder position are docked with the two ports of the two-way hydraulic pump, the two outlets of the hydraulic locking valve block and the two of the double-rod hydraulic cylinders The cylinder mouth is docked, and the two control ends of the hydraulic locking valve group are respectively connected to the oil feeding line which can be opened in the reverse direction, and the motor drives the two-way hydraulic pump, and the above-mentioned various devices are integrated into one whole.
  • the motor rotates forward, drives the high-pressure oil generated by the two-way hydraulic pump, moves the valve block to the cylinder port of the hydraulic cylinder through the hydraulic lock valve group, drives the hydraulic cylinder piston rod to move, and the high-pressure oil of the oil supply line triggers the hydraulic lock valve group, the hydraulic lock valve group Open in reverse, the return line is connected, and the hydraulic oil of the other cylinder port of the hydraulic cylinder is returned to the other port of the two-way hydraulic pump via the hydraulic lock valve group.
  • the hydraulic lock valve group When the external command hydraulic pump stops the pump (such as powering off the motor), the oil pressure of the oil supply line is lower than the set value, the hydraulic lock valve group cannot be triggered, the hydraulic lock valve group closes the system return line, locks the hydraulic cylinder and The position of the piston rod, the hydraulic cylinder piston rod realizes accurate positioning; the motor reverses, and the working process of the system is symmetric with the upper one. Pressure oil transfers energy in a closed loop.
  • the invention has the beneficial effects that: it integrates several devices into one whole, into a closed system, and has no open type fuel tank, and the installation is not restricted by direction, thereby facilitating the installation of the valve or the damper; Secondly, the foreign impurities can not enter the system, no oil filtering device is needed, and the system is prevented from jamming, which improves the reliability of the system. Again, due to the use of the hydraulic locking valve block, the system provides reverse balancing force to position the system. High precision; the system is smaller and the footprint is small, which is convenient for assembly and maintenance.
  • Figure 1 is a schematic view of a hydraulic circuit when the first type of hydraulic locking valve block of the present invention is used.
  • Figure 2 is a schematic view of the structure of the present invention.
  • Figure 3 is a schematic illustration of the hydraulic circuit of the present invention using a second type of hydraulic lockout valve block.
  • the hydraulic lock valve group having the position of the lock cylinder is composed of two balance valves 8-1 and 8-2, and the inlets of the two valves are respectively connected to the A port of the bidirectional hydraulic pump 3 and B port, the outlets of the two valves are respectively connected to the A cylinder port and the B cylinder port of the double rod hydraulic cylinder 10, and the control ends of the two valves are respectively connected to the oil supply line which can be reversely opened, that is,
  • the control end of the balance valve 8-1 is connected to the B port of the bidirectional hydraulic pump
  • the control end of the balance valve 8-2 is connected to the A oil of the bidirectional hydraulic pump.
  • the system is provided with a travel switch to automatically maintain the hydraulic cylinder (valve) in the open and closed positions
  • the travel switch is, two electromagnetic induction switches 13-1, 13-2 is disposed on the housing 20, and the two electromagnetic induction switches are respectively disposed at positions corresponding to the upper and lower ends of the piston rod of the hydraulic cylinder, and an induction head 101 is fixed at the end of the piston rod, and the sensing head distance sensing The distance of the switch is less than the distance of the piston rod from the inductive switch and is used to trigger the inductive switch to detect the position of the piston rod.
  • the system is also provided with a protection circuit.
  • the outlets of the two check valves 2-2 and 2-1 are respectively connected to the oil and oil ports of the two-way hydraulic pump, and the two check valves 2-1 and 2
  • the inlets of -2 are connected in parallel to form a return line of the protection circuit.
  • the two inlets of the shuttle valve 7 are respectively connected to the upper and lower oil lines of the system, and the outlet of the shuttle valve is connected to the return line of the protection circuit through the overflow valve 5,
  • the solenoid valve 6 is connected in parallel with the relief valve.
  • the working process is: When the motor M is rotating forward, the high-pressure oil generated by the two-way hydraulic pump 3 from the A port passes through the balancing valve 8-1 to the A-cylinder port of the hydraulic cylinder, and at the same time, the high-pressure oil triggers the control end of the balancing valve 8-2 When the difference between the hydraulic pressure of the control end and the hydraulic pressure of the hydraulic cylinder B reaches the set value, the balancing valve 8-2 is reversely opened, and the hydraulic oil of the cylinder B of the hydraulic cylinder B is returned to the bidirectional hydraulic pump B via the balancing valve 8-2. The port, at which point the hydraulic lock valve group produces a reverse equilibrium pressure.
  • the induction head triggers the corresponding induction switch 13-1, and the switch sends a signal to the control circuit, which is powered off, and the control circuit powers off the motor M, at this time on the oil pipeline.
  • the control end of the balance valve 8-2 cannot be triggered.
  • the balance valve 8-2 closes the system return line, locks the position of the hydraulic cylinder and the piston rod, and the valve is reliably opened or closed;
  • the control circuit sends power to the motor M and reverses it.
  • the working process of the system is symmetric with the upper one.
  • the shuttle valve opens, the oil passes through the shuttle valve, the relief valve and the return line of the protection circuit; when the system is unloaded, the high pressure oil passes through the shuttle valve, the solenoid valve and the protection circuit.
  • the return line is used at the beginning of the system startup.
  • the hydraulic lock valve group is such that the two inlets and outlets of the valve block are the inlet and outlet of the two check valves 6-1 and 6-2, and the inlets of the two check valves are respectively connected
  • the A port and the B port of the two-way hydraulic pump 3 the outlets of the two valves are respectively connected to the A cylinder port and the B cylinder port of the double rod hydraulic cylinder 10
  • the two control ends of the valve group are the control of two sequence valves End, that is, the control end of the sequence valve 7-1 is connected to the B port of the hydraulic pump, the control end of the sequence valve 7-2 is connected to the A port of the hydraulic pump, and the reversely opened circuit is made up of the sequence valve and the other
  • a one-way valve is composed in series, that is, the sequence valve 7-1 and the check valve 9-1 are connected in series, and are connected in parallel with the one-way valve 6-1, and the sequence valve 7-2 and the check valve 9-2 are connected in series, and one-way Valve 6-2 is connected in parallel.
  • the working process is: When the speed regulating motor M is rotating forward, the high-pressure oil generated by the two-way hydraulic pump 3 from the A port passes through the check valve 6-1 to the A cylinder port of the hydraulic cylinder, and drives the hydraulic cylinder piston to move downward, and at the same time, A The high-pressure oil of the branch line triggers the control end of the sequence valve 7-2.
  • the sequence valve 7-2 When the difference between the oil pressure at the control end and the oil pressure of the cylinder B cylinder reaches a preset value, the sequence valve 7-2 is opened, and the hydraulic oil of the cylinder port of the hydraulic cylinder B is sequentially The valve 7-2 and the check valve 9-2 return to the bidirectional hydraulic pump B port.
  • the B branch line high pressure oil generated by the bidirectional hydraulic pump 3 from the B port passes through the check valve 6-2 to the B cylinder port of the hydraulic cylinder, and drives the hydraulic cylinder piston to move upward. Meanwhile, the B branch line high pressure oil triggers the sequence valve.
  • the sequence valve 7-1 At the control end of 7-1, when the difference between the oil pressure of the control end and the hydraulic pressure of the cylinder A of the hydraulic cylinder reaches the set value, the sequence valve 7-1 is opened, and the hydraulic oil of the cylinder port of the hydraulic cylinder A passes through the sequence valve 7-1, single Return to the two-way hydraulic pump A port to the valve 9-1.
  • This embodiment sets the travel switch, and the set position and working process are the same as in the previous embodiment.
  • This embodiment also provides a protection circuit, specifically, the solenoid valve 6 is connected in parallel with the hydraulic pump 3.
  • the solenoid valve 6 is connected in parallel with the hydraulic pump 3.

Abstract

An integrated electro-hydraulic actuator comprises a hydraulic locking valve group with a position for locking a hydraulic cylinder, wherein two inlets of the hydraulic locking valve group are connected to two oil ports of a bidirectional hydraulic pump (3) and two outlets thereof are connected to two cylinder ports of the dual-rod hydraulic cylinder (10). An electric motor (M) drives the bidirectional hydraulic pump (3). The actuator integrates multiple devices as a whole, so as to avoid entering of exogenous impurity, and an opened oil tank is not used, so as to protect oil from being polluted. The actuator is simple in structure and easy to install.

Description

集成型电液执行器 技术领域  Integrated electro-hydraulic actuator
本发明涉及驱动并控制阀门、 风门等运行的一种执行机构， 所说的执行机构是指电液执 行器， 所说的运行是指阀门或风门的开、 关或保持。 它广泛应用于电力、 冶金、 石化、 管线 等行业。  The present invention relates to an actuator for driving and controlling the operation of valves, dampers, etc., said actuator being an electro-hydraulic actuator, said operation being the opening, closing or holding of a valve or damper. It is widely used in electric power, metallurgy, petrochemical, pipeline and other industries.
背景技术 Background technique
目前的电液执行器液压驱动系统主要是由单向液压泵、 液压阀、 油箱、 液压缸通过油管 路连接组成， 交流电机驱动液压泵， 液压缸的位置控制是由电液伺服阀或电液比例阀、 和位 置传感器等组成的控制回路实现的。 可见该系统是由若干个设备通过油管路连接组成， 每个 设备分立存在， 占地面积大， 系统大而复杂， 维护工作较多； 其次， 油箱是开式的， 油箱通 过呼吸口同大气相通， 油液很容易受到外界污染， 使液压阀、 伺服阀、 比例阀卡涩， 造成执 行器故障； 最后， 还由于油箱是开式的， 必须竖直放置， 而执行器的安装需要的空间较大， 这样使阀门或风门的安装位置受到限制。  The current electro-hydraulic actuator hydraulic drive system is mainly composed of a one-way hydraulic pump, a hydraulic valve, a fuel tank and a hydraulic cylinder connected by an oil pipeline. The AC motor drives the hydraulic pump. The position control of the hydraulic cylinder is controlled by an electro-hydraulic servo valve or electro-hydraulic A control loop consisting of a proportional valve, and a position sensor is implemented. It can be seen that the system is composed of several equipments connected by oil pipelines. Each equipment exists separately, the floor space is large, the system is large and complicated, and the maintenance work is more. Secondly, the fuel tank is open, and the fuel tank is connected to the atmosphere through the breathing port. The oil is easily exposed to external pollution, causing hydraulic valves, servo valves, and proportional valves to jam, causing actuator failure. Finally, because the fuel tank is open, it must be placed vertically, and the installation of the actuator requires more space. Large, this limits the installation position of the valve or damper.
发明内容 Summary of the invention
为解决上述技术问题， 本发明的目的在于提供一种集成型电液执行器。  In order to solve the above technical problems, an object of the present invention is to provide an integrated electro-hydraulic actuator.
本发明的目的是这样实现的： 具有锁定液压缸位置的液压锁定阀组的两个入口与双向液 压泵的两个油口对接， 液压锁定阀组的两个出口与双杆液压缸的两个缸口对接， 液压锁定阀 组的两个控制端分别接到可令其反向打开的上油管线上， 电机驱动双向液压泵， 上述各设备 集成为一整体。  The object of the invention is achieved in that: the two inlets of the hydraulic locking valve block with the locked hydraulic cylinder position are docked with the two ports of the two-way hydraulic pump, the two outlets of the hydraulic locking valve block and the two of the double-rod hydraulic cylinders The cylinder mouth is docked, and the two control ends of the hydraulic locking valve group are respectively connected to the oil feeding line which can be opened in the reverse direction, and the motor drives the two-way hydraulic pump, and the above-mentioned various devices are integrated into one whole.
电机正转， 驱动双向液压泵产生的高压油， 经液压锁定阀组到液压缸的一缸口， 驱动液 压缸活塞杆移动， 同时上油管线的高压油触发液压锁定阀组， 液压锁定阀组反向打开， 将回 油路接通， 液压缸另一缸口的液压油经液压锁定阀组回到双向液压泵另一油口。 当外部指令 液压泵停泵时 （比如给电机断电）， 上油管线的油压力低于设定值， 不能触发液压锁定阀组， 液压锁定阀组将系统回油管线关闭， 锁定液压缸及活塞杆的位置， 液压缸活塞杆实现准确定 位； 电机反转， 系统的工作过程与上对称。 压力油在一个封闭的回路中传递能量。  The motor rotates forward, drives the high-pressure oil generated by the two-way hydraulic pump, moves the valve block to the cylinder port of the hydraulic cylinder through the hydraulic lock valve group, drives the hydraulic cylinder piston rod to move, and the high-pressure oil of the oil supply line triggers the hydraulic lock valve group, the hydraulic lock valve group Open in reverse, the return line is connected, and the hydraulic oil of the other cylinder port of the hydraulic cylinder is returned to the other port of the two-way hydraulic pump via the hydraulic lock valve group. When the external command hydraulic pump stops the pump (such as powering off the motor), the oil pressure of the oil supply line is lower than the set value, the hydraulic lock valve group cannot be triggered, the hydraulic lock valve group closes the system return line, locks the hydraulic cylinder and The position of the piston rod, the hydraulic cylinder piston rod realizes accurate positioning; the motor reverses, and the working process of the system is symmetric with the upper one. Pressure oil transfers energy in a closed loop.
与现有技术相比， 本发明的有益效果是： 它是将若干个设备集成一整体， 成封闭系统， 无开口式油箱， 安装不受方向限制， 进而为阀门或风门的安装提供了方便； 其次外面的杂质 不能进入系统， 不需要滤油装置， 且避免了系统出现卡涩现象， 提高了系统的可靠性； 再次 由于使用了液压锁定阀组， 提供了系统反向平衡力， 使系统定位精度高； 最后系统变小， 占 地小， 为组装和维护提供了方便。 附图说明 Compared with the prior art, the invention has the beneficial effects that: it integrates several devices into one whole, into a closed system, and has no open type fuel tank, and the installation is not restricted by direction, thereby facilitating the installation of the valve or the damper; Secondly, the foreign impurities can not enter the system, no oil filtering device is needed, and the system is prevented from jamming, which improves the reliability of the system. Again, due to the use of the hydraulic locking valve block, the system provides reverse balancing force to position the system. High precision; the system is smaller and the footprint is small, which is convenient for assembly and maintenance. DRAWINGS
下面结合附图进一步说明本发明。  The invention will now be further described with reference to the accompanying drawings.
图 1是本发明使用第一种液压锁定阀组时的液压线路示意图。  BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic view of a hydraulic circuit when the first type of hydraulic locking valve block of the present invention is used.
图 2是本发明结构示意图。  Figure 2 is a schematic view of the structure of the present invention.
图 3是本发明使用第二种液压锁定阀组时的液压线路示意图。  Figure 3 is a schematic illustration of the hydraulic circuit of the present invention using a second type of hydraulic lockout valve block.
具体实施方式 detailed description
参见图 1， 所说的具有锁定液压缸位置的液压锁定阀组是由两个平衡阀 8-1和 8-2组成， 这两个阀的入口分别接到双向液压泵 3的 A油口和 B油口，这两个阀的出口分别接到双杆液 压缸 10的 A缸口和 B缸口， 这两个阀的控制端分别接到可令其反向打开的上油管线上， 即 平衡阀 8-1的控制端接到双向液压泵的 B油口， 平衡阀 8-2的控制端接到双向液压泵的 A油 Referring to Fig. 1, the hydraulic lock valve group having the position of the lock cylinder is composed of two balance valves 8-1 and 8-2, and the inlets of the two valves are respectively connected to the A port of the bidirectional hydraulic pump 3 and B port, the outlets of the two valves are respectively connected to the A cylinder port and the B cylinder port of the double rod hydraulic cylinder 10, and the control ends of the two valves are respectively connected to the oil supply line which can be reversely opened, that is, The control end of the balance valve 8-1 is connected to the B port of the bidirectional hydraulic pump, and the control end of the balance valve 8-2 is connected to the A oil of the bidirectional hydraulic pump.
Π。 Hey.
当液压缸 （阀门） 不需要中途保持时， 系统设行程开关， 使液压缸 （阀门） 在开和关的 位置上实现自动保持， 所说的行程开关是， 两个电磁感应开关 13-1、 13-2设置在壳体 20上， 这两个电磁感应开关分别设在与液压缸活塞杆的上下两个行程终点相对应的位置， 活塞杆的 端部固定一个感应头 101， 感应头距感应开关的距离小于活塞杆距感应开关的距离， 用于触 发感应开关， 以检测活塞杆的位置。  When the hydraulic cylinder (valve) does not need to be held midway, the system is provided with a travel switch to automatically maintain the hydraulic cylinder (valve) in the open and closed positions, the travel switch is, two electromagnetic induction switches 13-1, 13-2 is disposed on the housing 20, and the two electromagnetic induction switches are respectively disposed at positions corresponding to the upper and lower ends of the piston rod of the hydraulic cylinder, and an induction head 101 is fixed at the end of the piston rod, and the sensing head distance sensing The distance of the switch is less than the distance of the piston rod from the inductive switch and is used to trigger the inductive switch to detect the position of the piston rod.
该系统还设置了保护回路， 具体是， 两个单向阀 2-2和 2-1 的出口分别接到双向液压泵 的 Α油口和 Β油口， 两个单向阀 2-1和 2-2的入口并联， 形成保护回路的回油管线， 梭阀 7 的两个进口分别连在系统的上、 下油管线， 梭阀的出口通过溢流阀 5接到保护回路的回油管 线， 电磁阀 6与溢流阀并联。  The system is also provided with a protection circuit. Specifically, the outlets of the two check valves 2-2 and 2-1 are respectively connected to the oil and oil ports of the two-way hydraulic pump, and the two check valves 2-1 and 2 The inlets of -2 are connected in parallel to form a return line of the protection circuit. The two inlets of the shuttle valve 7 are respectively connected to the upper and lower oil lines of the system, and the outlet of the shuttle valve is connected to the return line of the protection circuit through the overflow valve 5, The solenoid valve 6 is connected in parallel with the relief valve.
上述各设备集成组装成一体 （参见图 2)。  Each of the above devices is integrated and integrated (see Figure 2).
工作过程是： 电机 M正转时， 双向液压泵 3从 A油口产生的高压油经平衡阀 8-1到液压 缸的 A缸口， 同时， 该高压油触发平衡阀 8-2的控制端， 该控制端的油压与液压缸 B缸油压 的差达到设定值时， 平衡阀 8-2反向打开， 液压缸 B缸口的液压油经平衡阀 8-2回到双向液 压泵 B油口， 此时液压锁定阀组产生反向平衡压力。 液压缸活塞向下移动至行程终点时， 感 应头触发对应的感应开关 13-1， 该开关发出信号， 输出到另设的控制电路， 该控制电路给电 机 M断电， 此时上油管线上液压低于设定值， 不能触发平衡阀 8-2的控制端， 平衡阀 8-2的 将系统回油管线关闭， 锁定液压缸及活塞杆的位置， 阀门实现可靠地开或关； 另设的控制电 路给电机 M送电并令其反转， 系统的工作过程与上对称。  The working process is: When the motor M is rotating forward, the high-pressure oil generated by the two-way hydraulic pump 3 from the A port passes through the balancing valve 8-1 to the A-cylinder port of the hydraulic cylinder, and at the same time, the high-pressure oil triggers the control end of the balancing valve 8-2 When the difference between the hydraulic pressure of the control end and the hydraulic pressure of the hydraulic cylinder B reaches the set value, the balancing valve 8-2 is reversely opened, and the hydraulic oil of the cylinder B of the hydraulic cylinder B is returned to the bidirectional hydraulic pump B via the balancing valve 8-2. The port, at which point the hydraulic lock valve group produces a reverse equilibrium pressure. When the hydraulic cylinder piston moves down to the end of the stroke, the induction head triggers the corresponding induction switch 13-1, and the switch sends a signal to the control circuit, which is powered off, and the control circuit powers off the motor M, at this time on the oil pipeline. If the hydraulic pressure is lower than the set value, the control end of the balance valve 8-2 cannot be triggered. The balance valve 8-2 closes the system return line, locks the position of the hydraulic cylinder and the piston rod, and the valve is reliably opened or closed; The control circuit sends power to the motor M and reverses it. The working process of the system is symmetric with the upper one.
当系统过载时， 高压油超过设定值， 梭阀打开， 油经梭阀、 溢流阀和保护回路的回油管 线； 当系统空载时， 高压油经梭阀、 电磁阀和保护回路的回油管线， 此时用于系统启动之初。 参见图 3， 所说的液压锁定阀组是， 阀组的两个入口和出口是两个单向阀 6-1和 6-2的入 口和出口， 这两个单向阀的入口分别接到双向液压泵 3的 A油口和 B油口， 这两个阀的出口 分别接到双杆液压缸 10的 A缸口和 B缸口， 阀组的两个控制端是两个顺序阀的控制端， 即 顺序阀 7-1的控制端接到液压泵的 B油口， 顺序阀 7-2的控制端接到液压泵的 A油口， 反向 打开的回路由所说的顺序阀和另一单向阀串联组成， 即顺序阀 7-1和单向阀 9-1 串联后、 与 单向阀 6-1并联， 顺序阀 7-2和单向阀 9-2串联后、 与单向阀 6-2并联。 工作过程是： 调速电 机 M正转时， 双向液压泵 3从 A油口产生的高压油经单向阀 6-1到液压缸的 A缸口， 驱动 液压缸活塞向下移动， 同时， A支线高压油触发顺序阀 7-2的控制端， 当控制端的油压与液 压缸 B缸油压的差达到预设值时， 顺序阀 7-2打开， 液压缸 B缸口的液压油经顺序阀 7-2、 单向阀 9-2回到双向液压泵 B油口。 电机反转时， 双向液压泵 3从 B油口产生的 B支线高压 油经单向阀 6-2到液压缸的 B缸口， 驱动液压缸活塞向上移动， 同时， B支线高压油触发顺 序阀 7-1的控制端， 该控制端的油压与液压缸 A缸油压的差达到设定值时， 顺序阀 7-1打开， 液压缸 A缸口的液压油经顺序阀 7-1、 单向阀 9-1回到双向液压泵 A油口。 When the system is overloaded, the high pressure oil exceeds the set value, the shuttle valve opens, the oil passes through the shuttle valve, the relief valve and the return line of the protection circuit; when the system is unloaded, the high pressure oil passes through the shuttle valve, the solenoid valve and the protection circuit. The return line is used at the beginning of the system startup. Referring to Figure 3, the hydraulic lock valve group is such that the two inlets and outlets of the valve block are the inlet and outlet of the two check valves 6-1 and 6-2, and the inlets of the two check valves are respectively connected The A port and the B port of the two-way hydraulic pump 3, the outlets of the two valves are respectively connected to the A cylinder port and the B cylinder port of the double rod hydraulic cylinder 10, and the two control ends of the valve group are the control of two sequence valves End, that is, the control end of the sequence valve 7-1 is connected to the B port of the hydraulic pump, the control end of the sequence valve 7-2 is connected to the A port of the hydraulic pump, and the reversely opened circuit is made up of the sequence valve and the other A one-way valve is composed in series, that is, the sequence valve 7-1 and the check valve 9-1 are connected in series, and are connected in parallel with the one-way valve 6-1, and the sequence valve 7-2 and the check valve 9-2 are connected in series, and one-way Valve 6-2 is connected in parallel. The working process is: When the speed regulating motor M is rotating forward, the high-pressure oil generated by the two-way hydraulic pump 3 from the A port passes through the check valve 6-1 to the A cylinder port of the hydraulic cylinder, and drives the hydraulic cylinder piston to move downward, and at the same time, A The high-pressure oil of the branch line triggers the control end of the sequence valve 7-2. When the difference between the oil pressure at the control end and the oil pressure of the cylinder B cylinder reaches a preset value, the sequence valve 7-2 is opened, and the hydraulic oil of the cylinder port of the hydraulic cylinder B is sequentially The valve 7-2 and the check valve 9-2 return to the bidirectional hydraulic pump B port. When the motor is reversed, the B branch line high pressure oil generated by the bidirectional hydraulic pump 3 from the B port passes through the check valve 6-2 to the B cylinder port of the hydraulic cylinder, and drives the hydraulic cylinder piston to move upward. Meanwhile, the B branch line high pressure oil triggers the sequence valve. At the control end of 7-1, when the difference between the oil pressure of the control end and the hydraulic pressure of the cylinder A of the hydraulic cylinder reaches the set value, the sequence valve 7-1 is opened, and the hydraulic oil of the cylinder port of the hydraulic cylinder A passes through the sequence valve 7-1, single Return to the two-way hydraulic pump A port to the valve 9-1.
本实施例设置了行程开关， 设置的位置与工作过程与上一个实施例相同。  This embodiment sets the travel switch, and the set position and working process are the same as in the previous embodiment.
本实施例还设置了保护回路， 具体是， 电磁阀 6与液压泵 3并联。 当系统空载时， 高压 油经电磁阀回到液压泵， 此时用于系统启动之初。  This embodiment also provides a protection circuit, specifically, the solenoid valve 6 is connected in parallel with the hydraulic pump 3. When the system is unloaded, the high pressure oil is returned to the hydraulic pump via the solenoid valve, which is used at the beginning of the system startup.

Claims

权利要求 Rights request
1、 一种集成型电液执行器， 其特征是： 具有锁定液压缸位置的液压锁定阀组的两个入口 接到双向液压泵的两个油口， 液压锁定阀组的两个出口接到双杆液压缸的两个缸口， 电机驱 动双向液压泵， 上述各设备集成为一整体。 1. An integrated electro-hydraulic actuator, characterized in that: two inlets of a hydraulic locking valve block having a locked hydraulic cylinder position are connected to two ports of a two-way hydraulic pump, and two outlets of the hydraulic locking valve group are connected The two cylinder ports of the double rod hydraulic cylinder and the motor drive bidirectional hydraulic pump are integrated into one unit.
2、 按照权利要求 1所述的集成型电液执行器， 其特征是： 所说的具有锁定液压缸位置的 液压锁定阀组是由两个平衡阀和组成，这两个阀的入口分别接到双向液压泵的 A油口和 B油 口， 这两个阀的出口分别接到双杆液压缸的 A缸口和 B缸口， 这两个阀的控制端分别接到可 令其反向打开的上油管线上， 即平衡阀的控制端接到双向液压泵的 B油口， 另一个平衡阀的 控制端接到双向液压泵的 A油口。  2. The integrated electro-hydraulic actuator according to claim 1, wherein: said hydraulic lock valve group having a locked hydraulic cylinder position is composed of two balance valves, and the inlets of the two valves are respectively connected To the A port and the B port of the two-way hydraulic pump, the outlets of the two valves are respectively connected to the A cylinder port and the B cylinder port of the double rod hydraulic cylinder, and the control ends of the two valves are respectively connected to reverse the same On the open oil line, the control end of the balance valve is connected to the B port of the bidirectional hydraulic pump, and the control end of the other balance valve is connected to the A port of the bidirectional hydraulic pump.
3、 按照权利要求 1所述的集成型电液执行器， 其特征是： 所说的液压锁定阀组是， 阀组 的两个入口和出口是两个单向阀 (6-1)和 (6-2)的入口和出口， 这两个单向阀的入口分别接到双 向液压泵 (3)的 A油口和 B油口，这两个阀的出口分别接到双杆液压缸 (10)的 A缸口和 B缸口， 阀组的两个控制端是两个顺序阀的控制端， 即顺序闽 (7-1)的控制端接到液压泵的 B油口， 顺 序阀 (7-2)的控制端接到液压泵的 A油口， 反向打开的回路由所说的顺序阀和另一单向阀串联 组成， 即顺序阀 (7-1)和单向阀 9-1 串联后、 与单向阀 (6-1)并联， 顺序阀 (7-2)和单向阀 (9-2)串 联后、 与单向阀 (6-2)并联。  3. The integrated electro-hydraulic actuator of claim 1 wherein: said hydraulic lock valve set is such that the two inlets and outlets of the valve block are two one-way valves (6-1) and ( 6-2) inlet and outlet, the inlets of the two check valves are respectively connected to the A port and the B port of the bidirectional hydraulic pump (3), and the outlets of the two valves are respectively connected to the double rod hydraulic cylinder (10) The A cylinder port and the B cylinder port, the two control ends of the valve block are the control ends of the two sequence valves, that is, the control end of the sequence 闽 (7-1) is connected to the B port of the hydraulic pump, the sequence valve (7) The control end of -2) is connected to the A port of the hydraulic pump, and the reverse open circuit is composed of the sequence valve and another check valve in series, that is, the sequence valve (7-1) and the check valve 9-1 After series connection, in parallel with the check valve (6-1), the sequence valve (7-2) and the check valve (9-2) are connected in series and in parallel with the check valve (6-2).
4、 按照权利要求 1、 2或 3所述的集成型电液执行器， 其特征是： 两个电磁感应开关设 置在壳体上， 这两个电磁感应开关分别设在与液压缸活塞杆的上下两个行程终点相对应的位 置， 活塞杆的端部固定一个感应头， 感应头距感应开关的距离小于活塞杆距感应开关的距离。  4. The integrated electro-hydraulic actuator according to claim 1, 2 or 3, wherein: two electromagnetic induction switches are disposed on the housing, and the two electromagnetic induction switches are respectively disposed on the piston rod of the hydraulic cylinder At the corresponding position of the upper and lower stroke ends, an induction head is fixed to the end of the piston rod, and the distance of the induction head from the induction switch is smaller than the distance of the piston rod from the induction switch.
5、 按照权利要求 1或 2所述的集成型电液执行器， 其特征是： 它还设置了保护回路， 具 体是，两个单向阀和的出口分别接到双向液压泵的 A油口和 B油口，两个单向阀的入口并联， 形成保护回路的回油管线， 梭阀的两个进口分别连在系统的上、 下油管线， 梭阀的出口通过 溢流阀接到保护回路的回油管线， 电磁阀与溢流阀并联。  5. The integrated electro-hydraulic actuator according to claim 1 or 2, characterized in that: a protective circuit is further provided, in particular, the two one-way valves and the outlet are respectively connected to the A port of the two-way hydraulic pump Connected with the B port and the inlets of the two check valves to form the return line of the protection circuit. The two inlets of the shuttle valve are respectively connected to the upper and lower oil lines of the system, and the outlet of the shuttle valve is protected by the overflow valve. The return line of the circuit, the solenoid valve is connected in parallel with the relief valve.
6、 按照权利要求 1或 3所述的集成型电液执行器， 其特征是： 电磁阀与液压泵并联。  6. An integrated electro-hydraulic actuator according to claim 1 or 3, wherein: the solenoid valve is connected in parallel with the hydraulic pump.
PCT/CN2010/070802 2009-12-18 2010-03-01 Integrated electro-hydraulic actuator WO2011072502A1 (en)

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