Research And Development Of Bearing Vibration Measuring Instrument

Bearing vibration measuring instrument is a special equipment for measuring theaccelerate and velocity of bearing vibration, which is widely used in a variety ofbearing vibration measurements．It is also an important equipment for qualityevaluation of bearing in the process of bearing assembly．Hence, the research ofmeasuring bearing vibration instrument is of great significance to develop the level ofbearing processing and manufacturing.This paper analyzes the vibration mechanism and the fault characteristicfrequency of rolling bearing, the physical quantities for measuring bearing vibrationand the statistical indexes of bearing vibration signal in time domain and frequencydomain are introduced. Furthermore, we analyze the relevant national standards. Thispaper analyzes and selects the hardware system of bearing vibration measuringinstrument. The mounting resonant frequency of the sensor installation mode and itseffect are mainly discussed in this paper, which can help select the sensor of vibrationvelocity and accelerate and can help design the sensor sleeve. The designed systemadopt acceleration integral velocity sensor of vibration, which is different fromtraditional magnet electric vibration velocity sensor. This meets the requirements ofwide dynamic response. Furthermore, software integration method of speed signal isdiscussed. A set of virtual instrument hardware platform of bearing vibrationmeasurement is built for designing and analyzing spindle system, data acquisitioncard and industrial computer. Virtual instrument software developing platform isbased on VC++and Measurement Studio. We also call LabVIEW analysis libraries inthe VC++environment for realization of data filter and spectrum analysis. Thedeveloped software system has the function for acquisition and analysis of vibrationdata, bearing quality judgment, history data storage and interaction with industrialequipment.Preliminary site tests on bearing manufacture and assembly line prove that, the data acquired by our bearing vibration measuring instrument is accurate, the dataanalysis is reliable, and the instrument is able to meet the manufacture requirements.