高速湿式离合器摩擦片表面微织构优化设计

doi:10.19562/j.chinasae.qcgc.2024.02.014

Abstract

Abstract:

The wet clutch is the core component of the vehicle transmission system. It is prone to rub-impact between the friction plate and steel plate during high-speed separation， resulting in a sharp increase in drag torque， and affecting its transmission efficiency and reliability. Therefore， in this paper， to reduce the rub-impact drag torque in high-speed wet clutch， the micro-texture on the surface of the friction plate is optimally designed. Firstly， a parameterized modeling method of arbitrary micro-texture shape lines on the surface of friction plate is proposed. Then the number， depth， circumferential proportion， radial proportion and shape line parameters of the micro-texture are selected to construct the design variables， constraint conditions and optimal objective function for micro-texture optimization. By combining the experiment design method， approximation modeling simulation and global search optimization method， an optimal design model of micro-texture on the surface of friction plate is established. Finally， a comparison test of drag torque before and after micro-texture optimization is carried out. The results show that the optimized micro-texture can significantly reduce the rub-impact drag torque at high circumferential speed， and greatly delay the critical speed at which the rub-impact phenomenon of friction pair occurs.

Key words: wet clutch, fluid-structure interaction, rub-impact, drag torque, optimization design

Lin Zhang,Hua Meng,Yu Feng,Xiaolong Zhao,Chao Wei,Yunbing Yan. Optimization Design of Micro-texture on the Surface of Friction Plate in High-Speed Wet Clutch[J].Automotive Engineering, 2024, 46(2): 320-328.

Figures/Tables 12

项目	参数名称	数值
摩擦副几何尺寸	内半径r_in/mm	173
	外半径r_out/mm	207
	转动惯量I_x， I_y /（kg $?$ m²）	0.026 1
	质量M_p/kg	1.43
工况参数	摩擦片转速n₁ /（r·min^-1）	5 000
	摩擦片线速度v₁ /（m·s^-1）	108.4
	平均间隙h_n /mm	0.5
	每副平均供流量Q_a /（L·min^-1）	1.8
	温度T /℃	40
	油液黏度u_l /（Pa·s）	0.091
	油液密度 ρ_l /（Pa·s）	866.3
设计参数约束条件	微织构数量N_g	［9， 36］
	微织构深度h_g /mm	［0.2， 0.5］
	微织构周向占比r_c	［0.1， 0.3］
	微织构径向占比r_ra	［0.6， 0.8］
	周向角度偏移量φ_i / （°）	［-0.1 0.1］
	有效摩擦面积系数ψ_s	［0.8， 0.9］

References 26

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响应	平均误差	最大误差	均方根误差	相关系数
T_d	4.042×10^-14	7.522×10^-14	4.285×10^-14	≈1
许用值	≤0.2	≤0.3	≤0.2	≥0.9

响应	平均误差	最大误差	均方根误差	相关系数
T_d	1.123×10^-14	2.459×10^-14	1.292×10^-14	≈1
许用值	≤0.2	≤0.3	≤0.2	≥0.9

参数	最优解	随机解1	随机解2	随机解3	随机解4	随机解5
N_g	30	18	30	16	24	9
h_g /mm	0.50	0.49	0.36	0.23	0.27	0.48
r_c	0.12	0.25	0.21	0.14	0.22	0.17
r_ra	0.72	0.60	0.68	0.65	0.60	0.70
φ₁ /（°）	0.044 95	0.037 06	0.027 20	-0.033 23	0.012 98	0.002 878
φ₂ /（°）	0.031 82	0.014 00	-0.002 08	-0.042 39	-0.023 91	-0.025 45
φ₃/（°）	0.014 27	-0.044 14	-0.041 28	-0.037 54	-0.011 84	-0.040 73
φ₄ /（°）	-0.020 28	-0.033 60	-0.038 38	0.043 77	0.032 02	-0.034 73
T_d /（N·m）	4.65	10.95	16.96	11.34	15.73	12.74

项目		工况（a）	工况（b）	工况（c）	工况（d）
线速度/（m·s^-1）	优化前	56.4	58.6	42.4	43.8
线速度/（m·s^-1）	优化后	86.7	88.1	64.8	65.4
线速度提升/%		53.7	50.3	52.8	49.3

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Optimization Design of Micro-texture on the Surface of Friction Plate in High-Speed Wet Clutch

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References 26

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