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Design and Analysis of Bearing System in Micro High-Speed Generator

Author: XieWen
Tutor: GuLe
School: Harbin Institute of Technology
Course: Mechanical Engineering
Keywords: High - speed motor bearings Shafting design Bearing thermal analysis Oil lubrication Flow field analysis
CLC: TH133.3
Type: Master's thesis
Year: 2011
Downloads: 91
Quote: 0
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Abstract

Power as the driving force of the development of human society, people's lives become increasingly inseparable from the demand for electricity, you need to have the support of micro-power plants in some special occasions or electricity transport. The miniature mobile power station by the starter-generator, gas turbine, and power generation equipment. The subject from the Harbin Institute of Technology - Aerospace Science and Technology Group, a joint technology center project cooperation projects have great market value. This paper studies the high-speed motor bearing - rotor shaft system design, analysis, and matching lubrication design and verified by experiments. Based on permanent magnet rotor design requirements, considering the operating characteristics of the motor, the rotor shaft system structure, layout and load bearing lubrication structure and coupling. High-Speed ??Bearing analysis software is an important parameter in the interior of the bearing and the bearing preload preferably with the design, and under the test conditions of the restrictions and requirements, the design of the structural parameters of the interference fit couplings and transfer design torque needed The minimum amount of interference parameters. Using finite element analysis software ANSYS to calculate the internal parameters and external parameters in different bearing friction power and heat transfer and temperature segment. This inside the main considerations bearing internal structure of the parameter of the material of the rolling body guide the way, the the ferrule groove curvature coefficient and contact angle of the first test, the working parameters of the bearing outside the speed of the bearing, the axial load and radial load. Bearing power loss and temperature segment to determine the design parameters of the bearing manufacturing ceramic angular contact ball bearings. Rolling bearings must have high-speed rotation the corresponding lubrication and cooling mode, for high-speed motor oil lubrication can effectively achieve the bearing cooling and lubrication, and can simplify the structural design of the motor. Using the classical CFD analysis software FLUENT the bearing cavity modeling analysis, calculated way to get lubricated with oil and gas bearing cavity flow field, pressure distribution, velocity distribution and temperature distribution, considered in the calculation process bearing self-heating and motor internal fever combined effect of the results by comparing different boundary conditions, reasonable lubrication parameters. Manufacturing a permanent magnet starter generator, completed the motor standalone rotation 63000r/min and the form of drag 33000r/min experimental verification, the results show that the accuracy of the processing and assembly of the motor, bearing preload, motor drive parameters of the normal high-speed motor Working great impact.

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CLC: > Industrial Technology > Machinery and Instrument Industry > Mechanical parts and gear > Moving parts > Bearing
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