CSP摆剪液压离合器温控管理研究
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摘要
CSP摆剪液压离合器摩擦副高速滑摩时温度过高会引起摩擦片烧蚀和润滑油炭化,因而需要对离合器的工作状态和冷却润滑流量展开研究。依据摩擦学理论和热平衡理论,建立离合器摩擦副温度场数学模型和油液冷却模型。通过对模型的数值求解,获得了摩擦副在不同啮合时间和啮合次数下的温升特性及不同冷却油量下的冷却特性。结果表明:啮合时间和接合次数增大会导致摩擦副温度显著升高;对偶钢片接触面温度场分布规律与接触应力分布规律一致;对偶钢片啮合面终态温度场分布趋于均匀,但高温点总数增多,温度场整体分布较为不均匀;冷却润滑流量在中低热负荷下对摩擦副温升影响低微,而在高热负荷下对摩擦副温升影响显著,但当流量增大到一定值后,增加流量对温升影响微弱。
Aiming at the phenomenon of friction plate ablation and the carbonization of the lubricating oil when the friction pair of the CSP pendulum shear hydraulc clutch passes through the high speed sliding,the author builds the mathematical model of the temperature field of friction pair and the oil cooling model which based on the theory of tribology and thermal equilibrium. In this paper,some temperature management methods have been studied which have an impact on torque transmission and temperature rise characteristic such as engaging time,joint frequency,cooling oil flow and so on. The research indicates that the temperature increased significantly accompanying the rise of engaging time,Joint frequency.Dual steel's contact surface temperature distribution is non-uniform,and consistent with the distribution of the contact stress distribution. Engaging dual final temperature field distribution tends to be uniform,but the total temperature increased,and the temperature field of the overall distribution is uneven. The cooling lubrication flow has a low influence on the temperature rise of the friction pairs under medium and low heat load,while in high thermal load on the temperature of friction effect significantly. But it effects weakly when the flow rate increases to a certain value.
Aiming at the phenomenon of friction plate ablation and the carbonization of the lubricating oil when the friction pair of the CSP pendulum shear hydraulc clutch passes through the high speed sliding,the author builds the mathematical model of the temperature field of friction pair and the oil cooling model which based on the theory of tribology and thermal equilibrium. In this paper,some temperature management methods have been studied which have an impact on torque transmission and temperature rise characteristic such as engaging time,joint frequency,cooling oil flow and so on. The research indicates that the temperature increased significantly accompanying the rise of engaging time,Joint frequency.Dual steel's contact surface temperature distribution is non-uniform,and consistent with the distribution of the contact stress distribution. Engaging dual final temperature field distribution tends to be uniform,but the total temperature increased,and the temperature field of the overall distribution is uneven. The cooling lubrication flow has a low influence on the temperature rise of the friction pairs under medium and low heat load,while in high thermal load on the temperature of friction effect significantly. But it effects weakly when the flow rate increases to a certain value.
引文
[1]张金乐,马彪,张英锋.湿式换档离合器温度场和应力场影响因素分析[J].北京理工大学学报,2010,30(6):660-664.(Zhang Jin-le,Ma Biao,Zhang Ying-feng.Analysis of temperature field and stress field of wet shift clutch[J].Journal of Beijing Institute of Technology,2010,30(6):660-664.)
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[8]王晓燕,李杰,张志凯.离合器摩擦副滑摩过程轴向振动特性研究[J].振动与冲击,2017,36(4):81-87.(Wang Xiao-yan,Li Jie,Zhang Zhi-kai.Study on axial vibration characteristics of sliding friction process of clutch friction pair[J].Vibration and Shock,2017,36(4):81-87.)
[9]王立勇,李乐,李和言.基于有限元的湿式离合器摩擦界面温度场变化过程分析[J].润滑与密封,2017,42(1):5-26.(Wang Li-yong,Li Le,Li He-yan.Finite element analysis of temperature field of wet clutch friction interface[J].lubrication and Seal,2017,42(1):5-26.)
[10]熊钊,苑士华,吴维.湿式离合器对偶钢片间油气两相流动的数值模拟[J].机械工程学报,2016,52(16):117-122.(Xiong Zhao,Yuan Shi-hua,Wu Wei.Numerical simulation of oil gas two phase flow in dual plates of wet clutch[J].Journal of Mechanical Engineering,2016,52(16):117-122.)
[2]杨为,陆国栋,吕和生.湿式多片摩擦离合器对偶钢片热-机耦合分析[J].重庆大学学报,2011,34(9):26-32.(Yang Wei,Lu Guo-dong,Lv He-sheng.Thermo mechanical coupling analysis of dual plate of wet multi disc friction clutch[J].Journal of Chongqing University,2011,34(9):26-32.)
[3]JANG J Y,KHONSARI M M,MAKI R.Three dimensional thermohydrodynamic analysis of a wet clutch with consideration of grooved friction surface[J].Journal of Tribology,2011(133):1-12.
[4]APHALE C R,CHO J,SCHULTZ W W.Modeling and parametric study of torque in open clutch plates[J].Journal of Tribology,2006,128(2):422-430.
[5]Greenwood J,Williamson J.Contact of nominally flat surfaces.Proc RSoc Lond Ser[A].Math Phys Sci,1966,295(1442):300-319.
[6]Chang W,Etsion I,Bogy DB.An elastic-plastic model for the contact of rough surfaces[J].Tribol,1987,109(2):257-63.
[7]Kogut L,Etsion I.A finite element based elastic-plastic model for the contact of rough surfaces[J].Tribol Trans,2003,46(3):383-90.
[8]王晓燕,李杰,张志凯.离合器摩擦副滑摩过程轴向振动特性研究[J].振动与冲击,2017,36(4):81-87.(Wang Xiao-yan,Li Jie,Zhang Zhi-kai.Study on axial vibration characteristics of sliding friction process of clutch friction pair[J].Vibration and Shock,2017,36(4):81-87.)
[9]王立勇,李乐,李和言.基于有限元的湿式离合器摩擦界面温度场变化过程分析[J].润滑与密封,2017,42(1):5-26.(Wang Li-yong,Li Le,Li He-yan.Finite element analysis of temperature field of wet clutch friction interface[J].lubrication and Seal,2017,42(1):5-26.)
[10]熊钊,苑士华,吴维.湿式离合器对偶钢片间油气两相流动的数值模拟[J].机械工程学报,2016,52(16):117-122.(Xiong Zhao,Yuan Shi-hua,Wu Wei.Numerical simulation of oil gas two phase flow in dual plates of wet clutch[J].Journal of Mechanical Engineering,2016,52(16):117-122.)