Assessment method for rolling bearing performance variation
A rolling bearing performance technology, applied in the field of failure analysis and monitoring of rolling bearing performance, can solve problems such as rolling bearing performance variation
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Embodiment 1
[0149] Example 1: figure 2 , 3 , 4 are part of the time series data of the bearing vibration when the grooves of the inner ring of the rolling bearing in a certain system have wear scar diameters of 0.1778, 0.5334 and 0.7112mm respectively. It can be seen that the larger the diameter of the wear scar, the more severe the vibration of the bearing. Therefore, the wear condition of the internal parts of the bearing can be deduced by analyzing the changes of the vibration information characteristics.
[0150] For the convenience of description, in this embodiment 1, the orange threshold is set u 0 =0.705, red threshold u 1 =0.555. Through this embodiment 1, the specific operation steps and calculation process of the present invention will also be described.
[0151] 1 Obtaining time series of rolling bearing performance
[0152] During the service period of the rolling bearing, the bearing inner ring channel in a certain system wears, and the diameter of the wear scar i...
Embodiment 2
[0165] Example 2 : Similar to Example 1, the optimal fuzzy equivalence relationship measure for the other two wear scar diameters can also be calculated u , see Table 1 and Figure 5 , Figure 5 The dashed line part is a smooth extension of the solid line part.
[0166] Depend on Figure 5 The corresponding orange threshold can be obtained u 0 and the red threshold u 1 The wear scar diameters of d 0=0.15mm and d 1 =0.75mm.
[0167] from Figure 2~Figure 5 It can be seen that the wear scar diameter d and the optimal fuzzy relation measure u There is a nonlinear relationship between them, and the wear spot diameter d The larger the value, the optimal fuzzy equivalence relation measure u smaller. This means that as the wear degree of the internal parts of the bearing increases, the time series of the bearing vibration caused by the wear becomes less stable, and the fuzzy equivalence relationship between the phase trajectories in the phase space becomes less clos...
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