隔膜泵驱动液压系统研究

发布时间：2018-12-18 21:01

【摘要】：随着管道输送技术的迅速发展,隔膜泵作为适用于固液两相流浆体管道输送的设备,在化工、电力、矿山、冶金等行业得到普遍应用。然而现有工业应用的隔膜泵主要采用曲柄滑块机构结构形式,设备体积庞大、制造成本高,存在流量脉动大等问题。因此本文提出了一种液压缸驱动的往复式隔膜泵。首先,本文分析了隔膜泵输送的物料—非均质流浆体在管道中的流动特性；建立了非均质流浆体在管道中流动时的动态模型；得出非均质浆体在水平管道中堆积流速以及阻力损失的计算方法。其次,确定了隔膜泵的驱动方案,设计了隔膜泵驱动液压系统。建立了隔膜泵驱动液压系统在工作时液压回路的数学模型,通过MATLAB/Simulink仿真,分析了液压系统的稳定性,并用PID控制方法对系统进行校正,优化了驱动液压系统的动、静态特性；利用AMESim软件搭建了隔膜泵驱动液压系统的仿真模型,对整个液压系统进行仿真,掌握驱动液压缸的运动规律、驱动液压缸内压力、流量变化规律以及泵的排出流量变化规律。最后,搭建隔膜泵驱动液压系统的试验平台,测试隔膜泵驱动液压系统的性能参数,并验证系统模型的正确性。试验结果表明：本文设计的隔膜泵液压驱动系统在泵送物料时能够满足物料的输送要求,泵的输出流量平稳,验证了理论研究的的正确性。
[Abstract]:With the rapid development of pipeline transportation technology, diaphragm pump is widely used in chemical, electric, mining, metallurgical and other industries as the equipment suitable for solid-liquid two-phase slurry pipeline transportation. However, the diaphragm pump used in industry mainly adopts crank and slider structure, the equipment is huge, the manufacturing cost is high, and the flow pulsation is large. Therefore, a reciprocating diaphragm pump driven by hydraulic cylinder is proposed in this paper. Firstly, this paper analyzes the flow characteristics of heterogeneous slurry transported by diaphragm pump in pipeline, and establishes the dynamic model of heterogeneous slurry flowing in pipeline. The method of calculating the flow velocity and resistance loss of heterogeneous slurry in horizontal pipeline is obtained. Secondly, the drive scheme of diaphragm pump is determined and the hydraulic system of diaphragm pump is designed. The mathematical model of hydraulic circuit of diaphragm pump driving hydraulic system is established. Through MATLAB/Simulink simulation, the stability of hydraulic system is analyzed, and the system is corrected by PID control method, and the dynamic of driving hydraulic system is optimized. Static characteristic; The simulation model of diaphragm pump driving hydraulic system is built by using AMESim software. The simulation of the whole hydraulic system is carried out to master the motion law of the driving cylinder, the variation law of the pressure and flow rate in the driving hydraulic cylinder and the law of the discharge flow of the pump. Finally, the test platform of diaphragm pump driving hydraulic system is built, the performance parameters of diaphragm pump driving hydraulic system are tested, and the correctness of the system model is verified. The experimental results show that the hydraulic drive system of the diaphragm pump designed in this paper can meet the requirements of material transportation and the output flow of the pump is stable, which verifies the correctness of the theoretical research.
【学位授予单位】：中南大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH323

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