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电液比例阀控制系统分析及应用研究 总被引:3,自引:0,他引:3
本文通过对电液比例阀控制系统进行分析,提出以可控PWM技术及其它相应电路人秋电液比例阀控制器,可大大减少温漂和滞环,减少本机功耗和发热,提高系统快速性和稳定性,并能够适应控制多种同类电液比例阀。 相似文献
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分析了液压同步控制回路形式,重点研究了电液比例阀控同步回路,以电液比例阀控四马达同步液压系统为研究对象,建立了同步系统液压和控制模型,利用AMESim/Simulink对四马达同步系统进行了基于模糊PID控制的联合仿真分析,结果表明,电液比例阀控四马达同步液压系统,响应速度快,同步精度高。仿真为这种新型同步控制方式的可行性验证以及进一步的发展与研究提供了依据与理论支持。 相似文献
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基于电液比例阀控制的液压系统的研究 总被引:1,自引:0,他引:1
《机械管理开发》2018,(12)
基于电液比例阀控制的相关理论,对液压系统的工作性能进行系统分析,对其合理性和优越性进行了评价。认为:在电液比例阀工作过程中对液压油流量的控制较好;与普通电液阀相比,电液比例阀控制液压系统对阀口的调控性优越,对液压油流量的控制精确,可保证系统的稳定运行。 相似文献
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介绍了电液比例阀计算机辅助测试系统的硬件构成,将NI公司的虚拟仪器软件LabVIEW 8.0应用于本系统,根据电液比例阀特性测试项目的要求,运用模块化的思想设计开发了测试系统软件,并给出了测试结果。从结果可以看出,利用虚拟仪器技术开发的比例阀计算机辅助测试系统能够精确高效地完成电液比例阀特性的测试工作。 相似文献
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High-pressure rubber hose is normally used to connect the control valves and actuators of hydraulic systems and thus lower their natural frequency. PID control is preferred in industrial hydraulic systems as it has many advantages over other controls. However, the low natural frequency of hose-connected systems limits the performance of PID control. In this paper, a hose-connected hydraulic lifting test rig is presented and the mathematical model of the system is proposed. Valve compensation strategy and hose compensation strategy are designed based respectively on the flow characteristic of the proportional valve and the mathematical model of the hose. Comparative experiments with typical desired trajectories are carried out in the test rig. Results show that both the compensation strategies are effective in improving the tracking accuracy. 相似文献
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针对现有锚杆钻车生产过程中存在的一些弊端,提出了锚杆钻车钻架阀组试验台的设计方案,设计了液压系统与试验台控制系统,并论述了系统的配置与工作原理。该系统将计算机控制、检测技术、计算机网络技术与液压控制系统有效地结合起来,可对液压系统各参量进行实时控制,对加载压力、阀组内部主要控制回路性能参数进行巡回跟踪检测,使阀组测试实现了自动化和智能化。 相似文献
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水下攻千斤作业是沉船打捞的关键环节。设计一种基于非开挖钻进的水下攻千斤电液驱动系统,对钻进过程的钻进及旋转负载进行研究,分析钻头承受的切削阻力、海底泥压力、冷却液作用力以及钻杆受到的摩擦阻力的影响,并基于压力流量复合控制提出了水下非开挖钻进电液驱动系统,采用比例溢流阀控制液压马达两腔压力,采用比例换向阀控制进入液压马达的流量。采用AMESim软件对水下非开挖钻进电液驱动系统进行仿真分析,结果表明,其基本能够实现在不同海底地质条件下恒压连续钻进,保证沉船打捞水下攻千斤作业的顺利进行。 相似文献
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This paper presents the results of numerical and experimental performance evaluation of the rotary tubular spool valve. The aim of this work is to develop further the novel design of the tubular spool valve by confirming experimentally the validity of the simulation model and its results, thereby proving the valve's potential to represent a feasible and more efficient alternative to conventionally used translation spool valves avoiding the use of two stage valve configurations. In this research the valve performance is assessed through numerical modelling and experimental studies of its metering characteristic and pressure losses. This paper demonstrates that the used valve model yields the results, which agree well with the conducted experimental study. Therefore, validation of the numerical model and the modelling results in the form of theoretical valve characteristics was accomplished. Firstly, the paper presents details of a numerical approach employed to evaluate valve performance and then analyzes the simulation results. Next, the valve performance is experimentally validated by testing a prototype valve on a hydraulic test rig capable of measuring the volume flow rate, pressure levels in up- and downstream lines of the valve across the entire spool angular stroke. Initially, average discrepancies between modelling and test results were 52.46% for the metering and 82.78% for the pressure loss characteristics. Correcting the model geometry aimed at eliminating differences between the valve model and the practically used prototype-test rig system enabled reduction of the error between experiment and modelling by 47.75% for the pressure loss function. This confirmed validity of the simulated characteristics of the valve. The benchmark comparison of pressure losses confirmed average 71.66% energy dissipation reduction compared to the industry-available analogue valve. 相似文献
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针对钻机圆弧型不完全开槽滚筒的结构特点,通过工艺分析及数控编程,根据数控车削中心的加工特点,给出加工此类不规则线型的一种新方法,有效提高了生产效率和加工质量。 相似文献
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现有旋挖钻机卷扬系统是由阀控液压马达驱动。作业过程中,该系统存在非常大的节流损失;而且工作装置下放过程中,大量重力势能经控制阀节流作用转化为热能耗散掉,造成整机能效较低。为此,提出一种卷扬装置电液混合驱动系统,电动机作为主驱动,控制工作装置运动,降低节流损失;液压泵/马达与蓄能器等组合,构成能量回收单元,回收利用重力势能,辅助电动机驱动卷扬装置。分析了液压卷扬、电动卷扬与电液混合驱动卷扬系统的工作原理和运行特性,建立了旋挖钻机机电液多学科联合仿真模型,对不同驱动系统的运行和能量特性进行研究。结果表明,电液混合驱动系统具有良好的运行特性,相较于液压、电动驱动的卷扬系统,可节能27%~66%。 相似文献
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