液力耦合器轴瓦磨损故障探析
福建福清核电有限公司, 福建福清 350318
| 摘 要： | 为了解决实际工作中遇到的液力耦合器轴瓦磨损问题，从几次液力耦合器轴瓦磨损故障共性特征着手分析，通过对润滑油品质、润滑油温度、轴瓦间隙、轴瓦过载、油中含气、润滑油量几个方面逐一研究，并对轴颈与轴瓦膨胀不同步导致瓦隙减小进行了分析计算、对轴瓦超载进行了分析计算、对油膜厚度进行了分析，研究结果表明引起液力耦合器轴瓦磨损的主要原因是泵组在润滑油温较低的情况下启动后快速加载到额定负荷致使轴颈与轴瓦膨胀不同步进而造成瓦隙瞬时减小，叠加提速过快产生的附加载荷造成轴瓦过载，导致最小油膜厚度接近临界油膜厚度，最终造成轴瓦磨损；轴瓦间隙处于设计范围的下限以及5、6瓦负荷分配不均，是导致轴瓦磨损的促成原因。并针对液力耦合器轴瓦磨损的问题给出可行的处理措施，可以从提高润滑油温度、延长泵提速时间、适当增大5瓦间隙等方面进行处理，可避免液力耦合器轴瓦磨损故障的发生。 |
| 关 键 词： | 最小油膜厚度; 故障分析; 轴瓦磨损; 处理 |
| DOI： | 10.57237/j.mse.2024.02.003 |
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收稿日期: 2024-05-05
接受日期: 2024-06-11
在线出版日期: 2024-06-18
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 |
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