Impact of the thermal effect on the load-carrying capacity of a slipper pair for an aviation axial-piston pump
Impact of the thermal effect on the load-carrying capacity of a slipper pair for an aviation axial-piston pump作者机构：School of Mechanical Engineering WenZhou University School of Mechanical Engineering Tongji University Sany Heavy Industry Co. Ltd
出 版 物：《Chinese Journal of Aeronautics》 (中国航空学报（英文版）)
年 卷 期：2018年第31卷第2期
页 面：395-409页
核心收录：
学科分类：080704[工学-流体机械及工程] 08[工学] 0807[工学-动力工程及工程热物理]
基 金：co-supported by the National Natural Science Foundation of China (No. 51505338 and No. 51475332) the Youths Science Foundation of Zhejiang (No. LQ16E050004 and No. LQ17E050003)
主 题：Aviation axial piston pumpFluid lubrication Load-carrying capacity Slipper pair Thermal effect
摘 要：A thermal hydraulic model based on the lumped parameter method is presented to analyze the load-carrying capacity of a slipper pair in an aviation axial-piston pump under specified operating conditions. Both theoretical and experimental results are presented to demonstrate the validity of the thermal hydraulic model. The results illustrate that the squeezing force and thermal wedge bearing force are the main factors that affect the film thickness and load-carrying *** high oil temperature and high load pressure, the film thickness decreases with increasing clamping force due to a combined action of the squeezing bearing force and the thermal wedge bearing force, but the load-carrying capacity will increase. An increase of the film thickness is proven to be beneficial under high shaft rotational speed but especially dangerous as it strongly increases the ripple amplitude of the film thickness, which leads to decreasing the load-carrying capacity. The structural parameters of the slipper can be optimized to achieve desired performance, such as the slipper radius ratio and orifice length diameter ratio. To satisfy the requirement of the load-carrying capacity, the slipper radius ratio should be selected from 1.4 to 1.8, and the orifice length diameter ratio should be selected from 4 to 5.
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