【作者】 李大；

【导师】 于兰英；

【作者基本信息】 西南交通大学 ， 驱动技术与智能系统， 2007， 硕士

【摘要】 随着噪声污染对人类健康的影响日益被人们所认识，低噪声机械装置已成为机械行业的主要研究对象之一。电动机、泵装置作为机械装置的一种，是机械降噪减振的重要研究对象。本文介绍了泵组噪声的来源、国内外降低泵组噪声的研究现状；对选用的电动机、泵装置进行了局部改造，并对改造前后两种系统的轴系振动进行了分析和仿真。本文综合考虑成本、加工工艺、装配、材料等方面的问题将原有系统的两轴集成为一体，提出了一种新的电机泵装置联接方法；对新、旧两种轴系进行了当量转化；根据扭转振动的基本原理分别分析两系统，得到了各自的固有频率；选取了各相关的阻尼系数，通过仿真得到了两系统电动机转子承受转矩油缸体端自由的有阻尼受迫扭转振动模型、相应的角位移差、角速度差以及系统从一平衡工况受到瞬时冲击后的扭转振动中油缸体附近轴上的最大力矩，从而得到了相应的角位移差、角速度差以及油缸体附近轴段上的力矩，并对轴进行了强度校核和安全系数校核。最后，基于上述的分析和仿真结果，本文说明了结构改造后的优点以及对降低噪声的影响，并比较了新旧系统在各种情况下的振动，给电动机、泵装置的研究提供了一定的参考。更多还原

【Abstract】 As noise pollution is being known gradually, low noise mechanical assemblies has been one of the main research objects in mechanical industry. As a kind of mechanical assembly, the device of motor and pump is an important object of the research of reducing noise and vibration of machines.In the thesis, the resource of the noise of pump setting and theresearch actuality of reducing noise of pump setting home and abroad? are introduced; some partial structures of the chosen device of motorand pump are changed and the vibration of the shafts of the two kindsof systems are analyzed and emulated.In the thesis, with cost, processing, assembly, materials etc considered, the two shafts of the former kind of system are integrated,a new connecting method of the setting of motor and pump is come up with; the two shaft systems are equivalently transformed; based on the basic principle of torsional vibration, the two systems are analyzed respectively and their inherent frequencies are obtained; the relative damping coefficients are chosen; forced torsional vibration type with damping when the motor rotor receives a external force and the oil cylinder remains free and the relative angular displacement difference, angular velocity difference and the maximum momen of the shaft section near to oil cylinder body of the two systems in torsional vibration are obtained by emulating so that the relative difference of angular displacement, difference of angular velocity and moment of the shafts are obtained and the strength check and the assurance coehhicient of the new shaft are done. Finally, based on above analysis and emulation results, the thesis introduces the advantages after thechanging the structure and the influence on reducing noises, also the thesis compares the vibration under respective conditions of the new system with that of the old one, which can provide some references for researching the device of motor and pump.更多还原