Drag torque prediction model of wet multi-disk shifting clutch

被引：5
|
作者：
Zhang Z.-G. [1 ]
Zhou X.-J. [1 ]
Li Y.-J. [2 ]
Shen L. [1 ]
Yang F.-C. [1 ]
机构：
[1] Institute of Modern Manufacturing Engineering, Zhejiang University
[2] National Key Laboratory of Vehicle Transmission, China North Vehicle Research Institute
来源：
Zhejiang Daxue Xuebao (Gongxue Ban)/Journal of Zhejiang University (Engineering Science) | 2011年 / 45卷 / 04期
关键词：
Centrifugal force; Drag torque; Prediction model; Surface tension; Wet multi-disk shifting clutch;
D O I：
10.3785/j.issn.1008-973X.2011.04.020
中图分类号：
学科分类号：
摘要：
A new prediction model was presented to predict the drag torque of a disengaged wet clutch in order to analyze the formation mechanism of drag torque of wet multi-disk shifting clutch. A radial velocity model of the oil film was deduced according to the Navier-Stokes equation based on laminar flow of viscosity hydrodynamics and considering the centrifugal effect of cooling and lubricating oil film in clearance. Then the radial velocity was analyzed. Results showed that the centrifugal force caused the shrinking of oil film. The equivalent outer radius was introduced to describe the phenomenon, and was resolved by utilizing the effect of surface tension of oil film. A new model was derived by combining the equivalent outer radius with the Newton inner friction law. The correctness and effectiveness of the new model were verified by test data and traditional model.
引用
收藏
页码：708 / 713
页数：5
相关论文
共 13 条
  • [1] Jia Y.-H., Zhang W.-M., Research on friction disk surface oil groove configuration and temperature raise in wet friction clutch, China Journal of Highway and Transport, 20, 5, pp. 112-116, (2007)
  • [2] Yuan Y.Q., Eysion A.L., James H., An improved hydro-dynamic model for open wet transmission clutches, Journal of Fluids Engineering, 27, 3, pp. 333-337, (2007)
  • [3] Frederick A.L., Parameters contributing to power loss in disengaged wet clutches, SAE Transactions, 83, 9, pp. 1026-1032, (1974)
  • [4] Robert L.F., Using the SAE#2 machine to evaluate wet clutch drag losses, SAE Transactions, 100, 2, pp. 518-525, (1991)
  • [5] Hisanao K., Chen Y.L., Henry H., Analysis of the various factors affecting drag torque in multiple plate wet clutches, SAE Transactions, 112, 5, pp. 1840-1845, (2003)
  • [6] Kato Y., Murasugi T., Hiraki H., Et al., Fuel economy improvement through tribological analysis of the wet clutches and brakes of an automatic transmission, JSAE Transactions, 58, 10, pp. 196-201, (1993)
  • [7] Aphale C.R., Cho J., Schultz W.W., Et al., Modeling and parametric study of torque in open clutch plates, Journal of Tribology, 128, 4, pp. 422-430, (2006)
  • [8] Yuan Y.Q., Attibele P., Dong Y., CFD simulation of the flows within disengaged wet clutches of an automatic transmission, SAE Transactions, 56, 3, pp. 1760-1768, (2003)
  • [9] Ma B., Yang W.-Z., Zhou K., A study on drag torque of hydraulic shift clutch, Machine Design, 17, 10, pp. 13-15, (1999)
  • [10] Yan Q.-D., Li H.-C., Study on drag torque of wet multidisc brake, Machinery, 28, 6, pp. 73-75, (2001)
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