Bearing vibration measurement needs to pay attention to the following 3 points:
1, the location of the measuring point select, different mechanical and structural bearing installation is different. Some bearings are mounted in the bearing seat, while the bearing is exposed. Measuring points should be arranged in the mechanical bearing seat. Installed on the machine, or directly on a box, with housing, the measurement points should be selected links higher stiffness or box to the appropriate location. In short, measuring point select is to get as many principles of bearing vibration signal in itself. If the scheduled polling, the positions of the measuring points to be consistent each time you measure, so that their production data is comparable.
2, point to select, depending on the bearing load is the case considered. If the bearings are subjected to radial load, you should measure the radial vibration, if the bearings are subjected to axial loads, axial vibration should be measured, if both radial and axial bearing load, General layout of sensors in both directions simultaneously. Should as far as possible sensor placement in maximum load density places, to guarantee to obtain the greatest possible bearing vibration signal in itself.
3, determination of the measuring scale, there are 3 kinds of scale, absolute scale, to demarcate the precise measuring method developed by the scale. It includes international, national-scale, ministerial scale, industries and enterprises, such as nasal cancer. Use an absolute scale, required with the same instrument, at the consolidated site, follow the same premise for the measurement. Selection of absolute scale, need to pay attention to grasping the usable frequency range and the measurement methods. A relative measure is for the uniform parts measuring on schedule, and compare chronologically, based on normal value in the case of value, according to the measured values compared with the benchmark value of multiple determination method. For low-frequency vibration, usually delineated measured values to reach the benchmark value of 1.5~2.0 for attention, about 4 times times the abnormal area. Analogical scales, refers to a number of unified type of bearing vibration monitoring of unified parts under the same premise, to distinguish and compare the vibration values.


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