CN105697473A - 结构合理的电液比例回路*** - Google Patents
结构合理的电液比例回路*** Download PDFInfo
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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
- F15B9/00—Servomotors 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
- F15B9/02—Servomotors 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
- F15B9/08—Servomotors 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
- F15B9/09—Servomotors 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
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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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/02—Servomotor systems with programme control derived from a store or timing device; Control devices therefor
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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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/08—Servomotor systems incorporating electrically operated control means
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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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
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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
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/0416—Fluid 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
- F15B13/0417—Load sensing elements; Internal fluid connections therefor; Anti-saturation or pressure-compensation valves
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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
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/28—Means for indicating the position, e.g. end of stroke
- F15B15/2815—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT
- F15B15/2869—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT using electromagnetic radiation, e.g. radar or microwaves
- F15B15/2876—Position 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
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/50—Pressure control
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/65—Methods of control of the load sensing pressure
- F15B2211/651—Methods of control of the load sensing pressure characterised by the way the load pressure is communicated to the load sensing circuit
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/665—Methods of control using electronic components
- F15B2211/6656—Closed loop control, i.e. control using feedback
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Abstract
本发明公开了一种结构合理的电液比例回路***,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。本发明结构合理,能有效提高压制效果。
Description
本申请是申请号:201410341288.9、申请日:2014.7.18、名称“电液比例回路***”的分案申请。
技术领域
本发明涉及一种电液比例回路***。
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***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***。
本发明的技术解决方案是:
一种电液比例回路***,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***流量整体控制,含高速换向阀的二级组合阀对***流量进行精确控制,含比例溢流阀的三级组合阀对***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***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***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***,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***流量整体控制,含高速换向阀的二级组合阀对***流量进行精确控制,含比例溢流阀的三级组合阀对***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。***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***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***流量,达到流量的合理配置。
图中还有节流器11、18、阀12。
Claims (1)
1.一种结构合理的电液比例回路***,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;***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。
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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*** |
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*** |
CN109931314B (zh) * | 2019-03-22 | 2024-05-14 | 中国铁建重工集团股份有限公司 | 液压*** |
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***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*** |
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CN104121255A (zh) | 2014-10-29 |
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