Exploration and Analysis of Bearing Bush Wear Failure of Hydraulic Coupling
Fujian Fuqing Nuclear Power Co. Ltd, Fuqing 350318, China
| Abstract: | In order to solve the wear problem of hydraulic coupling bearing bush encountered in practical work, the common characteristics of several wear failures of hydraulic coupling bearing bush are analyzed, through the lubricating oil quality, lubricating oil temperature, bearing clearance, bearing overload, gas in the oil, lubricating oil volume and several aspects of one by one, and the journal and bearing bush expansion is not synchronous resulting in bearing bush clearance reduction for analysis and calculation, bearing bush overload for analysis and calculation, oil film thickness for analysis and calculation. The results show that the main reason for the wear of the hydraulic coupling bearing is that the pump unit is quickly loaded to the rated load after starting at a low lubricating oil temperature, resulting in the journal and bearing expansion being out of synchronous, resulting in an instantaneous reduction of the bearing gap, and the additional load generated by superimposed acceleration causes the bearing overload, resulting in the minimum oil film thickness being reduced to the critical oil film thickness, and finally causing the bearing wear. In addition, Bearing clearance at the lower limit of the design range and the uneven load distribution of 5 and 6 watts are the contributing causes of bearing wear. The feasible treatment measures are given for the wear of the bearing bush of the hydraulic coupling, which can be dealt with from the three aspects of increasing the lubricating oil temperature, extending the pump speed increase time, and appropriately increasing the clearance of 5 bearing, avoiding the occurrence of wear failure of the bearing shells of the hydraulic coupling. |
| Keywords: | Minimum Oil Film Thickness; Analysis of Faults; Bearing Bush Wear; Treatment |
| DOI: | 10.57237/j.mse.2024.02.003 |
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Received: 5 May 2024
Accepted: 11 June 2024
Published Online: 18 June 2024
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