Device for bearing diagnostics using shock pulse method
Operation manual
Section 3
Technical description
9
3.4.
Design and operation
3.4.1.
Operation principles
Shock pulse method
Installation, operation, repair and maintenance are main factors that influence
bearing life. Periodic bearing monitoring during its operation is the best way
to prevent damage and costly repair. There are several bearing monitoring
methods: temperature measurement, vibration measurement, sound
measurement and shock pulse method. The shock pulse method allows
measuring bearing condition during normal bearing operation without
influence of vibration generated by a machine or bearing. The shock pulse
method allows timely detecting bearing defects resulted from improper
manufacture, improper assembly, improper lubrication and scratches on
rotation surfaces.
Bearing condition is determined by the shock pulse method as follows: initially
a new bearing has a low shock pulse value and if this value increases up to
1,000 times of the initial shock pulse value, it means that the bearing life has
expired.
Figure 3-2. Bearing wear development.
Shock pulse strength depends on a shock velocity V, if A represents a peak
shock value, then there is a relation of A = f (V), while the shock velocity V
also depends on a bearing size, rotation speed and defect size.
