The impacts of different groove shapes, numbers, and angle of friction dish on transmitting torque, speed, push pressure in wet speeding clutch are discussed in this paper. Since the wet speed governing clutch works within hydrodynamic lubrication, mixture lubrication, boundary lubrication and contact situation, the oils combining with α hydrocarbon or polyester are getting widely used as lubricant. The power law fluid model with Patir Cheng average flow model, GT asperity contact model and oil film inertia are applied for average Reynolds equation setting. In order to investigate the relationship between average push pressure within hydrodynamic lubrication and mixture lubrication, average transmitting torque and output speed, the numeral calculation and analysis are presented. According to calculation, it is found that the groove shape, groove angle and groove numbers affect the average transfer torque and push pressure with the speed rate.
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