Miniature bearing small bearing 608 bearings

From rolling bearing performance, this chapter discusses the problems existing in the rolling bearing vibration and noise research, and bring out the main content of the book, that is, from design, manufacturing and testing etc. The key to study the formation and control of rolling bearing vibration and noise problems, and from the bearing vibration and noise of real-time evaluation, effective implementation of initiation and evolution of dynamic fault forecast, discusses the issue of rolling bearing failure and reliability prediction performance; Sound of rolling bearing vibration and noise research and recent development status of the development process. 1. 1 of the rolling bearing vibration and noise. 1. 1 from rolling bearing performance of rolling bearing is the key to the widely used mechanical basic parts, on the basis of the national construction and it is very important joints in the operation of the national economy. The service performance reliability of the rolling bearing running condition directly affect the work of the host and the situation. As the aerospace, the rapid development of high speed passenger cars and new energy, to a lot of rolling bearings, such as aerospace bearings, ships, nuclear reactors, bearing, bearing of high speed railway bearing, and wind turbine bearings, engineering and academic circles increasingly pay attention to the performance and reliability study life, to ensure safe and reliable work host line 1 '. In bearing during normal operation and performance meet the requirements of service, the pressing needs in a timely manner when predicting the future performance between the life and reliability of information, to find the failure, take measures as soon as possible, avoid malignant accident '기. For a long time, rolling bearing reliability theory mainly related to fatigue failure and static reliability problems, and assumes that obey Weibull life s distribution or logarithmic normal distribution. But, rolling bearing has a lot of performance requirements, with different way, the main performance of three different. During the bearing service, some performance degradation and failure probability distribution information is considered to be known, and also has a lot of performance degradation and failure probability distribution is unknown or the unascertained information. For example, the vibration and noise, friction torque, parts of fracture, sealing, bonding and trend of burns and other laws and failure probability distribution, is still unknown or unascertained '- 。 Even the same performance, the new bearing inquiry and improve existing bearing, a new bearing performance degradation rule and the failure probability distribution may be different from the original. In particular, belong to the non-stationary roller bearing performance degradation process, has the characteristics of nonlinear dynamics, usually through the initial degradation, gradual degradation, and rapid degradation and deteriorated phase, trend of performance, performance failure locus and budgetary rate changed information distribution function, performance, reliability, etc. 1. 1. 2 the present situation of the rolling bearing performance research in recent years, the rolling bearing reliability research in life design and experiment evaluation, failure analysis and fault diagnosis,