楔块重心位置对斜撑离合器性能的影响  

Effects of Gravity Center Position of Sprags on Sprag Clutch Performance

作　　者：严宏志 王志标[1,3] 朱楚 蔡孟凯 黎佳 胡璇 YAN Hongzhi;WANG Zhibiao;ZHU Chu;CAI Mengkai;LI Jia;HU Xuan(Light Alloys Research Institute,Central South University,Changsha,410012;College of Mechanical and Electrical Engineering,Central South University,Changsha,410012;State Key Laboratory of High Performance Complex Manufacturing,Central South University,Changsha,410012;AECC Hunan Aviation Powerplant Research Institute,Zhuzhou,Hunan,412002)

机构地区：[1]中南大学轻合金研究院,长沙410012 [2]中南大学机电工程学院,长沙410012 [3]中南大学高性能复杂制造国家重点实验室,长沙410012 [4]中国航发湖南动力机械研究所,株洲412002

出　　处：《中国机械工程》2021年第3期253-260,共8页China Mechanical Engineering

基　　金：国家自然科学基金(51575533)。

摘　　要：在强制连续约束(PCE)型超越离合器工作过程中,由于楔块的重心与其自身旋转中心不重合,导致其所受离心力产生一个绕中心的扭矩,使得楔块惯性扭矩随重心位置改变,进而影响离合器的工作性能。采用分解法及坐标变换建立了楔块重心位置模型,采用ADAMS软件建立了斜撑离合器动力学模型,研究了不同重心位置的楔块对接触力及离合器接合、脱开性能的影响规律。结果表明:当重心位于旋转中心左侧0.05 mm时,楔块与内外环接触力将比位于中心左侧0.01 mm增大6%,离合器的接合时间加速14%,有利于楔合;当重心位于旋转中心右侧0.05 mm时,楔块与内外环接触力将比位于中心右侧0.01 mm减小6%,离合器的脱开时间加速20%,脱开性能变好。In the working processes of the PCE type overrunning clutches,since the gravity center of the sprag did not coincide with its own rotation center,the centrifugal forces might generate a torque,which made the inertia torque of sprag change with the gravity center position,and might affect the working performance of the clutches.The gravity center position models of sprag were established by decomposition method and coordinate transformation herein.The dynamics model of the sprag clutches was established by ADAMS software.The sprag contact force,clutch engagement and disengagement performance at different gravity center were studied.The results show that when the gravity center is as 0.05 mm to the left of the rotation center,the contact force between the sprag and the inner-outer rings increases by 6%compared with that of 0.01 mm and the engagement time of the clutches raises 14%,which is beneficial to the engagement.When the gravity center position is as 0.05 mm to the right of the rotation center,the contact force between the sprag and the inner-outer rings reduces by 6%compared with that of 0.01 mm,the disengagement time of the clutches speeds up to 20%,and the disengagement performance may be better.

关 键 词：楔块 重心位置 接触力 离合器性能 

分 类 号：TH133[机械工程—机械制造及自动化]