INA bearing vibration diagnosis technology, including signal acquisition, signal processing and fault identification in three areas of content.
Signal acquisition of INA bearing vibration, low frequency vibrations and contains 1kHz thousands of cycles per second or even tens of thousands of cycles per second of high-frequency vibration.
Commonly used acceleration sensor or speed sensor vibration signal acquisition, selection principles of assurances that the sensor itself weight is less than the effective weight of the system being tested at least one-tenth.
Test frequency range should be in the linear frequency range for the selected sensor.
Test the maximum vibration levels shall not exceed the sensor allows impact speeds of one-third. Generally low-sensitivity sensor for vibration level, high sensitivity vibration sensor for small situations.
Should choose to adapt the corresponding sensor signal processing environment sensor output signal, containing a wealth of characterization of INA bearing vibration waveform, with all sorts of noises.
Signal processing in the output signal from the sensor's role is required to isolate and its characteristic parameters of curve.
Vibration signal analysis of time-domain analysis and frequency-domain analysis of two main. Amplitude range for time-domain analysis and moveout domain in two forms, between time domain and frequency domain transform by using the fast Fourier transform technique.
1) INA bearing ring relative to the load's status relative to the load direction is rotating or swinging rings, you should choose an interference fit or transition fit. Fixed relative to the direction of load rings should select a clearance fit. When inseparable-INA bearing walk when supported, it should be fixed relative to the direction of load rings as swimming rings, select a clearance fit or transition fit.
2) type and size of load when when subjected to impact loads or heavy loads, generally lighter than normal, you should choose load when closer cooperation. For radial-INA bearings, load sizes to equivalent dynamic radial load Pr divided compared with the radial dynamic load rating Cr. Large load, combined with larger interference.
3) INA bearing size as the INA bearing size increases, selecting an interference fit its large interference; a clearance fit its large gap.
4) INA bearing clearance interference would result INA bearing clearance decreases, you should verify the installation meets the requirements of INA bearing clearance after in order to correctly select matching and INA bearing clearance.
5) other factors shaft and INA bearing materials, external, strength and thermal conductivity and thermal conductivity of heat generated in the INA bearing and its ways, supporting installation and tuning performance, affect the selection of fit.



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