In order to solve the wet multi-plate clutch friction during the temporary engagement to generate hot phenomenon

by considering the friction sliding speed

the correspondence between the wavelength

the contact pressure growth ratio and migration speed

the number and finite element numerical model of hotspots generation theory are established

the regularity study of hot spot generating mechanism problem is carried out.The results show that during a high-speed sliding speed of wet brake temporary engagement is the main reason causing serious hot spot phenomenon

with the sliding speed increasing

the growth rate and the critical speed are increased

the more the number of hotspots generated corresponding to the maximum growth rate corresponding to smaller wavelengths direction. The smaller the modulus of elasticity

the smaller the rate of growth and migration under the same sliding velocity corresponding hotspots generated number also fell

the critical speed increased.The growth rate and critical speed can be significantly reduced with the thickness of the friction material increasing

but the wavelength under the most unstable state is increased too.Through the finite element section for different friction materials and friction pair geometrical parameter

the influence of material elastic characteristics and geometry size on the hot spots generated are revealed.