微型高速起动发电机轴承系统设计分析
发布时间：2019-04-09 10:50
【摘要】：电作为人类社会发展的驱动力,人们的生活越来越离不开对电力的需求,在一些特殊场合或者电力无法输送的地方就需要有微型电站的支持。微型可移动电站主要由起动发电机,燃机,以及发电等配套设备组成。本课题源于哈工大-航天科技集团联合技术中心项目合作项目,具有很大的市场价值。本文主要研究高速电机轴承—转子轴系设计、分析以及相配套的润滑设计,并进行了试验验证。 依据永磁电机转子设计要求,综合考虑电机的工作特性,确定了转子轴系结构形式、轴承的布置方式和加载方式、润滑结构和联轴器。采用高速轴承分析软件对轴承内部的重要参数和轴承预紧力进行优选与设计,并根据试验条件的限制和要求,设计了采用过盈配合方式的联轴器结构参数和传递设计扭矩所需要的最小过盈量参数。 采用有限元分析软件ANSYS计算出在不同的轴承内部参数与外界参数对摩擦功耗的影响以及热量的传递与温度分部。这里面主要考虑的轴承内部结构参数有滚动体的材料、引导方式、套圈的沟曲率系数和初试接触角,轴承外部的工况参数有轴承转速、轴向载荷与径向载荷。根据轴承功率损耗和温度分部的影响,确定了轴承的设计参数,加工制造了角接触陶瓷球轴承。 滚动轴承在高速旋转时必须要有相应的润滑与散热方式,针对高速电机而言,采用油气润滑能够有效地实现对轴承散热与润滑,并且可以简化电机的结构设计。采用经典CFD分析软件FLUENT,对轴承腔体建模分析,计算出采用油气润滑方式得到的轴承腔体流场分布,压强分布,速度分布与温度分布,在计算过程中考虑轴承自身发热和电机内部发热共同作用,通过对比不同的边界条件下的计算结果,获得合理的润滑参数。 加工制造了永磁启动发电机,完成了电机单机旋转63000r/min和对拖形式33000r/min的实验验证,结果表明电机的加工装配精度、轴承预紧力、电机驱动器的参数对高速电机的正常工作影响很大。
[Abstract]:Electricity as the driving force of the development of human society, people's life is more and more inseparable from the demand for electricity, in some special occasions or where electricity can not be delivered need the support of micro-power stations. Micro movable power station mainly consists of starting generator, gas turbine, power generation and other supporting equipment. This project originates from the joint technical center project of Harbin University of Technology and Aerospace Science and Technology Group, which has great market value. In this paper, the design, analysis and lubrication design of bearing-rotor shafting of high-speed motor are studied and verified by experiments. According to the design requirements of permanent magnet motor rotor, considering the working characteristics of the motor, the rotor shaft structure, bearing arrangement and loading mode, lubrication structure and coupling are determined. High-speed bearing analysis software is used to optimize and design the important parameters and pre-tightening force of bearing, and according to the limits and requirements of test conditions, The structural parameters of the coupling with interference fit and the minimum interference parameters required to transfer the design torque are designed. The influence of internal and external parameters of bearing on friction power consumption, heat transfer and temperature distribution were calculated by finite element analysis software ANSYS. The internal structural parameters of the bearing are the material of the rolling body, the guiding mode, the groove curvature coefficient of the ring and the contact angle of the initial test. The outer working parameters of the bearing include the bearing speed, axial load and radial load. According to the influence of the power loss and temperature segment of the bearing, the design parameters of the bearing are determined and the angular contact ceramic ball bearing is manufactured. The rolling bearing must have corresponding lubrication and heat dissipation when rotating at high speed. For the high speed motor, oil and gas lubrication can effectively realize the heat dissipation and lubrication of the bearing, and simplify the structure design of the motor. The classical CFD analysis software FLUENT, is used to model and analyze the bearing cavity. The flow field distribution, pressure distribution, velocity distribution and temperature distribution of the bearing cavity obtained by oil and gas lubrication are calculated. In the process of calculation, bearing self-heating and internal heating of motor are considered, and reasonable lubrication parameters are obtained by comparing the calculated results under different boundary conditions. The permanent magnet start-up generator is manufactured, and the experimental verification of single machine rotating 63000r/min and drag type 33000r/min is completed. The results show that the machining and assembly precision of the motor and the bearing pretightening force are achieved. The parameters of the motor driver have a great influence on the normal operation of the high-speed motor.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH133.3
本文编号：2455118
[Abstract]:Electricity as the driving force of the development of human society, people's life is more and more inseparable from the demand for electricity, in some special occasions or where electricity can not be delivered need the support of micro-power stations. Micro movable power station mainly consists of starting generator, gas turbine, power generation and other supporting equipment. This project originates from the joint technical center project of Harbin University of Technology and Aerospace Science and Technology Group, which has great market value. In this paper, the design, analysis and lubrication design of bearing-rotor shafting of high-speed motor are studied and verified by experiments. According to the design requirements of permanent magnet motor rotor, considering the working characteristics of the motor, the rotor shaft structure, bearing arrangement and loading mode, lubrication structure and coupling are determined. High-speed bearing analysis software is used to optimize and design the important parameters and pre-tightening force of bearing, and according to the limits and requirements of test conditions, The structural parameters of the coupling with interference fit and the minimum interference parameters required to transfer the design torque are designed. The influence of internal and external parameters of bearing on friction power consumption, heat transfer and temperature distribution were calculated by finite element analysis software ANSYS. The internal structural parameters of the bearing are the material of the rolling body, the guiding mode, the groove curvature coefficient of the ring and the contact angle of the initial test. The outer working parameters of the bearing include the bearing speed, axial load and radial load. According to the influence of the power loss and temperature segment of the bearing, the design parameters of the bearing are determined and the angular contact ceramic ball bearing is manufactured. The rolling bearing must have corresponding lubrication and heat dissipation when rotating at high speed. For the high speed motor, oil and gas lubrication can effectively realize the heat dissipation and lubrication of the bearing, and simplify the structure design of the motor. The classical CFD analysis software FLUENT, is used to model and analyze the bearing cavity. The flow field distribution, pressure distribution, velocity distribution and temperature distribution of the bearing cavity obtained by oil and gas lubrication are calculated. In the process of calculation, bearing self-heating and internal heating of motor are considered, and reasonable lubrication parameters are obtained by comparing the calculated results under different boundary conditions. The permanent magnet start-up generator is manufactured, and the experimental verification of single machine rotating 63000r/min and drag type 33000r/min is completed. The results show that the machining and assembly precision of the motor and the bearing pretightening force are achieved. The parameters of the motor driver have a great influence on the normal operation of the high-speed motor.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH133.3
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