【作者】 杨铁宁；

【导师】 张金中；

【作者基本信息】 中国石油大学 ， 机械设计及理论， 2009， 硕士

【摘要】 传统往复泵一般通过曲柄连杆机构将旋转电机的电能转化为直线运动的机械能,效率低,输出流量、压力脉动大,易损件寿命低。直线电机可以将电能直接转化为直线运动的机械能,将直线电机作为往复泵的动力端可以很好的解决以上问题。该课题已完成直线电机往复泵的理论分析和结构设计,本论文在此基础上安装试验台完成试验,验证其理论设计要求,检验直线电机往复泵的实际工作性能、运动特性。针对直线电机的控制策略以及恒定输出流量的要求,确定了直线电机往复泵的运动方案。针对往复泵、直线电机的尺寸,以及柱塞运动规律,完成直线电机往复泵试验台的管路设计;完成试验用管路装置、流量压力测量装置、数据采集系统的选用;完成直线电机往复泵试验台的安装与调试;对直线电机的控制参数进行调节与优化;比较不同的直线电机控制模式,选取有效的控制模式提高控制精度;针对数据采集过程中出现的信号扰动进行处理与优化;本文依据试验目的,在不同冲次、不同负载的工况下对直线电机往复泵进行了试验研究;对采集到的柱塞运动、压力、流量数据进行分析与比较;探讨了造成系统输出流量、压力波动的原因。更多还原

【Abstract】 The electrical motor of traditional reciprocating pump transforms electric energy into rectilinear mechanical energy by crank link gear. Its efficiency is low. The delivery rate and pressure pulsate greatly. The working time of replacement parts is low. The linear motor transforms electric energy into rectilinear mechanical energy directly. The foregoing problem will be resolved when using linear motor as driving force of the reciprocating pump.In this paper, a test system was installed to check the design target, test the practical working performance and motion property of linear motor reciprocating pump. Based on the theory analysis and structural design, a motion plan has been determined for the control strategy of linear motor and the goal of constant output flow rate.The design of pipe line was finished in connection with the objective of testing the flow rare, pressure and the characteristics of plunger motion. The selection of pipeline, measuring device of flow rate and pressure, data collection system was finished in this paper. The installation and debug of the experiment system was finished. The control parameter of linear motor was adjusted and optimized. An effective control model has been chosen to enhance the controlling resolution. The disturbing signal occurred in the data collection has been optimized. In this paper, the experiments have been carried on in different frequency of stroke and different pressure. The data of plunger motion, pressure and flow rate was analyzed and compared with each other. We investigated the reason for the fluctuation of output flow rate and pressure. Some effective improvement measures have been put forwarded in this paper.更多还原