三电机自同步振动筛同步相位差角间接测试研究

发布时间：2018-10-15 16:52

【摘要】：筛分机械中基于转子耦合原理的自同步振动筛,各电机间均无直接连接,其结构简单、工作可靠并便于维修,正逐步替代采用齿轮或同步带传动的强迫同步振动筛。对于该类转子耦合自同步振动筛,国内外学者先后采用哈密顿原理、平均小参数法、庞加莱法、能量法对其同步性能进行了深入探讨,并提出了评定同步机械系统自同步性能的直接物理量是偏心电机转子同步相位差角的大小,而现阶段对该类自同步振动筛同步相位差角的测试研究却止步于传统的拍摄法及直接转速测试法。本文针对传统测试方法的不足提出了一种新的同步相位差角间接测试方法,分别从理论、仿真和实验三个角度出发,对双电机、三电机自同步振动筛同步相位差角的间接测试方法进行研究,完成了以下工作:(1)鉴于现有成熟的自同步理论,利用庞加莱法和平均小参数法分别研究了双电机和三电机自同步振动系统的同步行为,并根据自同步振动筛筛箱上任意点与其质心间的运动关系建立了相应的自同步振动筛同步相位差角的间接测试理论模型,同时编写了自同步相位差角的计算分析程序。(2)根据所推导出的理论模型,利用MATLAB\Simulink中异步感应电动机仿真模块和方程微积分模块建立了机电耦合动力学模型,通过计算机模拟仿真技术手段验证了同步相位差角间接测试分析方法的正确性,并确定了测点的布置方案。(3)利用PTC Creo三维软件设计了双电机、三电机自同步椭圆振动筛三维模型,并加工了相应的实验样机;此外基于Matlab\GUI界面设计了实验数据处理分析系统,以便于动态测试实验数据的高效分析与管理。(4)同时展开了间接测试实验和高速摄像仪对比实验,分别利用实验数据处理分析系统和AutoCAD定量分析得到同步相位差角值,对照分析了两实验结果并验证了该同步相位差角间接测试方法的可行性。
[Abstract]:The self-synchronous vibrating screen based on the rotor coupling principle in the screening machine has no direct connection between the motors. The structure is simple, the work is reliable and easy to maintain, and the forced synchronous vibrating screen with gear or synchronous belt transmission is being replaced step by step. For this kind of rotor coupling self-synchronous vibrating screen, domestic and foreign scholars have adopted Hamiltonian principle, average small parameter method, Poincare method and energy method to discuss its synchronization performance. It is proposed that the direct physical quantity for evaluating the self-synchronization performance of the synchronous mechanical system is the magnitude of the synchronous phase difference angle of the rotor of the eccentric motor. At present, the research on the synchronous phase difference angle of this kind of self-synchronous vibrating screen stops at the traditional shooting method and the direct rotational speed test method. In this paper, a new indirect measurement method of synchronous phase difference angle is put forward, which is based on the theory, simulation and experiment. The indirect measurement method of synchronous phase difference angle of three-motor self-synchronous vibrating screen has been studied. The following work has been accomplished: (1) in view of the existing mature self-synchronization theory, By using the Poincare method and the average small parameter method, the synchronous behavior of the self-synchronous vibration system with two motors and three motors is studied respectively. According to the motion relation between any point on the self-synchronous vibrating screen box and its center of mass, an indirect measurement model of the synchronous phase difference angle of the self-synchronous vibrating screen is established. At the same time, the calculation and analysis program of the self-synchronous phase difference angle is compiled. (2) according to the theoretical model derived, the electromechanical coupling dynamics model is established by using the simulation module of asynchronous induction motor and the equation calculus module in MATLAB\ Simulink. The accuracy of the indirect measurement and analysis method of synchronous phase difference angle is verified by means of computer simulation and simulation technology. (3) double motor is designed by using PTC Creo software. The three dimensional model of three motor self-synchronous elliptic vibrating screen and the corresponding experimental prototype are machined. In addition, the experimental data processing and analysis system is designed based on Matlab\ GUI interface. In order to facilitate the efficient analysis and management of the dynamic test data. (4) the indirect test experiment and the contrast experiment of high-speed camera are carried out at the same time. The synchronous phase difference angle is obtained by using the experimental data processing and analysis system and AutoCAD quantitative analysis, respectively. The results of two experiments were compared and the feasibility of the indirect measurement method of synchronous phase difference angle was verified.
【学位授予单位】：西南石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TH237.6

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