CN105697462A - 工作效果好的电液比例回路系统 - Google Patents

工作效果好的电液比例回路系统 Download PDF

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CN105697462A
CN105697462A CN201610163451.6A CN201610163451A CN105697462A CN 105697462 A CN105697462 A CN 105697462A CN 201610163451 A CN201610163451 A CN 201610163451A CN 105697462 A CN105697462 A CN 105697462A
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valve
plc
master cylinder
pump
rodless cavity
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陈金华
邓继文
郭成功
周建智
朱张蓓
陆佳南
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State Grid Corp of China SGCC
State Grid Jiangsu Electric Power Co Ltd
Nantong Power Supply Co of Jiangsu Electric Power Co Ltd
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State Grid Corp of China SGCC
State Grid Jiangsu Electric Power Co Ltd
Nantong Power Supply Co of Jiangsu Electric Power Co Ltd
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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
    • F15B21/00Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/08Servomotor systems incorporating electrically operated control means
    • 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
    • F15B9/00Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member
    • F15B9/02Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type
    • F15B9/08Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type controlled by valves affecting the fluid feed or the fluid outlet of the servomotor
    • F15B9/09Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type controlled by valves affecting the fluid feed or the fluid outlet of the servomotor with electrical control means
    • 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
    • F15B21/00Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/02Servomotor systems with programme control derived from a store or timing device; Control devices therefor
    • 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
    • F15B11/00Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/08Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
    • 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
    • F15B13/04Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/0416Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor with means or adapted for load sensing
    • F15B13/0417Load sensing elements; Internal fluid connections therefor; Anti-saturation or pressure-compensation valves
    • 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
    • F15B15/00Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20Other details, e.g. assembly with regulating devices
    • F15B15/28Means for indicating the position, e.g. end of stroke
    • F15B15/2815Position sensing, i.e. means for continuous measurement of position, e.g. LVDT
    • F15B15/2869Position sensing, i.e. means for continuous measurement of position, e.g. LVDT using electromagnetic radiation, e.g. radar or microwaves
    • F15B15/2876Position sensing, i.e. means for continuous measurement of position, e.g. LVDT using electromagnetic radiation, e.g. radar or microwaves using optical means, e.g. laser
    • 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
    • F15B2211/00Circuits for servomotor systems
    • F15B2211/20Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205Systems with pumps
    • 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
    • F15B2211/00Circuits for servomotor systems
    • F15B2211/50Pressure control
    • 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
    • F15B2211/00Circuits for servomotor systems
    • F15B2211/60Circuit components or control therefor
    • F15B2211/65Methods of control of the load sensing pressure
    • F15B2211/651Methods of control of the load sensing pressure characterised by the way the load pressure is communicated to the load sensing circuit
    • 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
    • F15B2211/00Circuits for servomotor systems
    • F15B2211/60Circuit components or control therefor
    • F15B2211/665Methods of control using electronic components
    • F15B2211/6656Closed loop control, i.e. control using feedback

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Analytical Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Optics & Photonics (AREA)
  • Health & Medical Sciences (AREA)
  • Electromagnetism (AREA)
  • Radar, Positioning & Navigation (AREA)
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  • Fluid-Pressure Circuits (AREA)

Abstract

本发明公开了一种工作效果好的电液比例回路系统,泵与由插装阀和受PLC控制器控制的换向阀组成的二级组合阀连接,二级组合阀与主缸的无杆腔相通,主缸的有杆腔与由溢流阀、换向阀、插装阀组成的三级组合阀相通,三级组合阀与油箱相通;在主缸的无杆腔、有杆腔上均设置压力传感器,另设有感知主缸活塞位置信号的光栅尺,所述压力传感器、光栅尺均与PLC控制器连接,PLC控制器与控制同步伺服电机工作的驱动器连接;主缸的无杆腔通过液控单向阀与补油箱连接;二级组合阀中的受PLC控制器控制的换向阀为高速换向阀;三级组合阀中的溢流阀为普通溢流阀或比例溢流阀。本发明结构合理,能有效提高压制效果。

Description

工作效果好的电液比例回路系统
本申请是申请号:201410341288.9、申请日:2014.7.18、名称“电液比例回路系统”的分案申请。
技术领域
本发明涉及一种电液比例回路系统。
背景技术
在液压设备的压制产品的过程中,位置和压力的超调是造成制品精度不够的主要因素之一。超调往往是因为检测元件(如压力传感器、位移传感器)、换向阀等的响应滞后,在达到设定值和停止供油之间存在时间间隔,液压泵有多余的液压油流出,多余的液压油进入主油缸,必然造成压力超调或位置超调。而活塞杆自重很大,在惯性作用下难以立即停止,也是造成超调的因素之一。
在电力设备使用的液压系统也存在压力调节的问题。
发明内容
本发明的目的在于提供一种结构合理,能有效提高压制性能的电液比例回路系统。
本发明的技术解决方案是:
一种电液比例回路系统,包括油箱、泵,其特征是:泵采用同步伺服电机控制的定量泵,泵与由插装阀和受PLC控制器控制的换向阀组成的二级组合阀连接,二级组合阀与主缸的无杆腔相通,主缸的有杆腔与由溢流阀、换向阀、插装阀组成的三级组合阀相通,三级组合阀与油箱相通;在主缸的无杆腔、有杆腔上均设置压力传感器,另设有感知主缸活塞位置信号的光栅尺,所述压力传感器、光栅尺均与PLC控制器连接,PLC控制器与控制同步伺服电机工作的驱动器连接;主缸的无杆腔通过液控单向阀与补油箱连接,所述伺服电机、定量泵及驱动器组成变速能源驱动装置;变速能源驱动装置对系统流量整体控制,含高速换向阀的二级组合阀对系统流量进行精确控制,含比例溢流阀的三级组合阀对系统压力进行精确控制。
二级组合阀中的受PLC控制器控制的换向阀为普通换向阀或高速换向阀。
三级组合阀中的溢流阀为普通溢流阀或比例溢流阀。
本发明结构合理,能有效提高压制性能,工作效果好。可适用于包括电力系统在内各种液压设备。
附图说明
图1是本发明一个实施例的结构示意图。
图中包括:伺服电机3,定量泵4,滤油器5,油箱6,换向阀7、13、14、19,溢流阀8、15,插装阀9、10、16、17,主缸21,补油系统20(补油箱和液控单向阀),压力传感器22、光栅尺23,PLC控制器1和驱动器2等。
具体实施方式
实施例1:
一种电液比例回路系统,包括油箱6、泵4,泵采用同步伺服电机控制的齿轮定量泵,泵与由插装阀17和受PLC控制器控制的换向阀19组成的二级组合阀连接,二级组合阀与主缸21的无杆腔相通,主缸的有杆腔与由溢流阀8、换向阀7、插装阀9组成的三级组合阀相通,三级组合阀与油箱6相通;在主缸的无杆腔、有杆腔上均设置压力传感器22,另设有感知主缸活塞位置信号的光栅尺23,所述压力传感器、光栅尺均与PLC控制器1连接,PLC控制器与控制同步伺服电机工作的驱动器2连接;主缸的无杆腔通过液控单向阀与补油箱连接,所述伺服电机、定量泵及驱动器组成变速能源驱动装置;变速能源驱动装置对系统流量整体控制,含高速换向阀的二级组合阀对系统流量进行精确控制,含比例溢流阀的三级组合阀对系统压力进行精确控制。
二级组合阀中的受PLC控制器控制的换向阀为普通换向阀或高速换向阀。
三级组合阀中的溢流阀为普通溢流阀或比例溢流阀。
当快速下行时,变速能源装置(同步伺服电机控制的齿轮定量泵)输出流量通过普通换向阀19打开插装阀17,使得压力油进入主缸21的无杆腔,活塞下行。当有杆腔压力大于溢流阀8设定值时,溢流阀8打开,多余的油液经插装阀9回到油箱。当慢速下行时,光栅尺23实时地采集活塞杆的位置信号,并传送给PLC控制器1,再由驱动器2据此作出相应的动作。对活塞的下行位置设定预期值,当活塞继续下行达到预定位置时,PLC控制器1发出指今改变伺服电机3的转速,从而使泵的输出流量变小实现慢速下行。流量变化引起的波动普通溢流阀8并不能平滑地泄压。当保压时,根据压力传感器22的反馈信号和光栅尺23反馈的位置信号,PLC控制器1立即发出信号使换向阀19作出相应动作。同时,PLC控制器1发出信号使伺服电机停止转动。系统响应滞后而引起的超调量可以通过溢流阀8泄压。当要快速回程时,PLC控制器1发出指令,主缸处于回程状态。
本系统使用光栅尺23实时反馈活塞杆位置,相比其他粉末成形专用液压机普便使用的行程开关,有更快的响应速度。其中变转速能源装置可以根据负载的需求自动调整系统流量,达到流量的合理配置。
图中还有节流器11、18、阀12。

Claims (1)

1.一种工作效果好的电液比例回路系统,包括油箱、泵,其特征是:泵采用同步伺服电机控制的定量泵,泵与由第一插装阀和受PLC控制器控制的第一换向阀组成的二级组合阀连接,二级组合阀与主缸的无杆腔相通,主缸的有杆腔与由溢流阀、第二换向阀、第二插装阀组成的三级组合阀相通,三级组合阀与油箱相通;在主缸的无杆腔、有杆腔上均设置压力传感器,另设有感知主缸活塞位置信号的光栅尺,所述压力传感器、光栅尺均与PLC控制器连接,PLC控制器与控制同步伺服电机工作的驱动器连接;主缸的无杆腔通过液控单向阀与补油箱连接,所述伺服电机、定量泵及驱动器组成变速能源驱动装置;
当快速下行时,变速能源装置输出流量通过受PLC控制器控制的第一换向阀19打开第一插装阀(17),使得压力油进入主缸(21)的无杆腔,活塞下行;当有杆腔压力大于溢流阀(8)设定值时,溢流阀(8)打开,多余的油液经第二插装阀(9)回到油箱;当慢速下行时,光栅尺(23)实时地采集活塞杆的位置信号,并传送给PLC控制器(1),再由驱动器(2)据此作出相应的动作;对活塞的下行位置设定预期值,当活塞继续下行达到预定位置时,PLC控制器(1)发出指今改变伺服电机3的转速,从而使泵的输出流量变小实现慢速下行;流量变化引起的波动溢流阀(8)并不能平滑地泄压;当保压时,根据压力传感器(22)的反馈信号和光栅尺(23)反馈的位置信号,PLC控制器(1)立即发出信号使第一换向阀(19)作出相应动作;同时,PLC控制器(1)发出信号使伺服电机停止转动;系统响应滞后而引起的超调量通过溢流阀(8)泄压;当要快速回程时,PLC控制器(1)发出指令,主缸处于回程状态;
二级组合阀中的受PLC控制器控制的换向阀为高速换向阀;三级组合阀中的溢流阀为普通溢流阀或比例溢流阀。
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CN105736492B (zh) * 2016-04-14 2018-01-26 刘湖南 一种液压油缸及其油路系统
CN107642511B (zh) * 2017-10-20 2024-01-19 河南科技大学 一种直驱式电液伺服模锻锤控制系统
CN109931314B (zh) * 2019-03-22 2024-05-14 中国铁建重工集团股份有限公司 液压系统
CN110332180A (zh) * 2019-08-16 2019-10-15 中冶赛迪工程技术股份有限公司 一种节能型高炉热风炉液压控制系统及方法
CN113864274A (zh) * 2021-10-18 2021-12-31 山东泰丰智能控制股份有限公司 一种升降液压控制系统

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