摘要:在转子机械中,当转子转速在临界转速附近转动时,转轴剧烈振动,产生“共振”状态;而当转子转速超过临界转速后的一段区间内,转子系统又表现为平稳运转,。这些旋转原理现象例如亚谐振动,分岔,振幅跳跃等等。在当代,因为人类生活的日益提高,对旋转类的机械性质要求越来越严格,人类的要求则越来越深入。例如速度、转速、工作效率和安全可靠性等方面在现代旋转机械中都有着更高的要求。现代转子动力学是为机械旋转运动最为重要元素之一,其中主要研究对象之一就是旋转机械转子系统的故障问题。较为常见的旋转机械转子故障问题主要为陀螺效应、脱动、密封,碰摩、轴承油膜的故障和藕合故障等。为研究这些现象,人们建立模型,利用计算机分析该数据,在研究中求解不同种情况下的转子系统的动态响应,分析转子系统的非线性及性质影响等等因素。转子系统其中一个非常重要的问题就是转子系统的稳定性问题,转子的运动中多为转速稳定的周期运动,但是由于转子系统问题越来越复杂,临界转速的振动,转子原理发现的越来越多,造成问题的研究也就越来越困难。因此要维持转子系统的稳定周期运动是非常困难的,导致转子系统会产生了的显著的临界转速振动和非协调进动。对转子系统的正常运行产生了巨大的影响。73745
毕业论文关键词:转子系统;非线性;临界转速
Test system design of small rotor experiment platform
Abstract:With the rapid development of rotating machinery, many nonlinear phenomena such as bifurcation with the amplitude, jump, subharmonic vibration in modern rotating machinery, are more common, the rotating machinery in terms of speed, capacity, efficiency and reliability etc。 put forward higher requirements, problems the rotor system has become one of the main research objects of modern rotor dynamics。 At present, there are a lot of common rotor faults, such as gyro effect, looseness, rub impact, crack, seal, bearing oil film fault and coupling fault。 The main research directions include the analysis of the dynamic response under various conditions, the nonlinear and chaotic characteristics of the rotor system, the influence of the parameters, etc。。 The stability of the rotor system also can not be neglected, the movement of the rotor must generally be limited to stable periodic motion, but because the rotor system is more and more complicated, the fault occurred frequently, leading to stable periodic motion of the rotor system loses its stability, the system will produce a large low-frequency component and non coordination precession, had an impact on the system operation。
Key words:rotor system;nonlinear; frequancy vibration
目录
1 绪论 1
1。1 课题背景及其研究意义 1
2 转子实验台的设计 3
2。1 转子实验台结构 3
2。1。1 转子实验台结构简介 4
2。1。2 转子系统的轴及材料选型 6
2。1。3 转子系统的转子选型 8
2。1。4 转子系统的轴承选型及润滑油的选型 10
2。1。5 转子系统的转动功率的计算 11
2。1。6 转子系统的电机选型 13
2。2 转子实验台结构参数计算