某高速船用齿轮箱油泵连接套失效机理研究

目的掌握工作油泵连接套微观运行机理,增加齿轮箱的可靠性。方法从齿轮箱系统角度,对工作油泵连接套的结构进行分析,从齿轮箱动态运行、连接套微观磨损等方面的失效机理进行深入研究。结果通过分析和验证,机带泵端面键的间隙范围在0.05~1.5 mm左右为最佳,长期运行后端面的磨损程度可通过增加端面键硬度和润滑、减少齿轮箱的轴系扰动等措施减缓与控制。由于本齿轮箱的结构特点,端面键的寿命在1.5万小时内。在此基础上,对齿轮箱中连接套与油泵的连接方式进行了优化,在油泵的一端采用渐开线花键连接,可有效减小其磨损程度。结论某高速船用齿轮箱油泵连接套失效是由端面键的间隙、端面键动态运转时蠕动磨损、齿轮箱的轴系扰动等引起的,可通过合理设计端面键的间隙、增加端面键硬度和润滑,减小轴系扰动或优化为渐开线花键等措施预防。

Failure Mechanism of Connecting Sleeve of a High-Speed Marine Gearbox Oil Pump

The work aims to master the micro-operation mechanism of the connecting sleeve of the working oil pump and increase the reliability of the gearbox. The structure of the connecting sleeve of the working oil pump was analyzed from the perspective of gearbox system. The failure mechanism of gearbox dynamic operation and micro-wear of connecting sleeve were studied in depth. Through analysis and verification, the optimal clearance range of the machine pump end key was 0.05 mm~ 1.5 mm. After long-term operation, the end face will have wear, which can be alleviated and controlled by measures such as increasing the hardness and lubrication of the end face key and reducing the shafting disturbance of the gear box. Due to the structural characteristics of the gearbox, the lifetime of the end face key was within 15,000 hours. Based on the above analysis, the connection way between the connecting sleeve and the oil pump in the gear box was optimized, and the involute spline was adopted at one end of the oil pump, which can effectively reduce its wear degree. The failure of high-speed marine gearbox oil pump connector is caused by the end key clearance, end key crawling wear of dynamic motion, shaft disturbance of gearbox etc. Reasonable design of end key tolerance, increasing the the end key hardness and lubrication, and reducing disturbance or optimizing the involute spline and other measures can be taken to prevent it.