橡胶衬层硬度和厚度对水润滑轴承系统跳动量的影响

根据舰船推进装置对水润滑轴承系统的运行精度要求,通过建立水润滑橡胶轴承系统有限元接触模型,研究不同橡胶硬度、厚度对直槽和螺旋槽水润滑橡胶轴承系统跳动量的影响规律,提出水润滑轴承系统跳动量控制方法。研究结果表明,水润滑橡胶轴承系统跳动量随橡胶硬度增大而减小,随橡胶厚度增大而增大。当橡胶硬度在85~95Shore A时,轴承系统主轴跳动量较小。在保证沟槽尺寸的前提下,尽量设计成较薄的橡胶厚度。相比直槽结构,螺旋槽水润滑橡胶轴承系统跳动量更小。因此,科学合理地设计水润滑橡胶轴承橡胶衬层材料硬度和几何结构,能显著减小轴承系统的跳动量,提高运行精度。

Effects of rubber liner's hardness and thickness on the runout of the water lubricated rubber bearing system

For the fact that the ship propeller has a strict requirement for the running accuracy of the water lubricated rubber bearing system (WLRBS), a finite element contact model of the WLRBS was established. The effects of the rubber liner''s hardness and thickness on the runout of the WLRBS with straight or spiral grooves were analyzed, and a way of controlling the runout was put forward. The research results indicate that the value of the runout increases with the decrease of the rubber hardness, while increases with the increase of the rubber thickness. And the runout of the shaft is relatively small when the hardness varies between 85~95 shore A. The thickness of rubber should be designed as thin as possible with ensuring the groove dimension. Besides, the runout of the WLRBS with spiral grooves is smaller than that with straight grooves. Therefore, scientific and reasonable design of the geometric structure and the hardness of the rubber liner can significantly reduce the value of the runout and improve the running accuracy.