Flow Field Analysis And Belt Row Of Wet Friction Clutch Drag Torque Characteristics Research

As the key equipment of the transmission system of transport ships and ships,the wet friction clutch has the advantages of stable performance,low wear and long life.With the development of ship transmission systems in the direction of high power and high speed density,the comprehensive performance requirements of wet friction clutches are constantly increasing.The belt-exhaust torque generated by viscous shear under de-exhaust working conditions affects the efficiency and performance of wet friction clutches.Therefore,the research on the dynamic change of the flow field and the belt-discharge characteristics of the wet friction clutch is of great significance for improving the comprehensive performance of the clutch.The main content of this article includes the following aspects:(1)Considering the influence of centrifugal force and lubricating oil flow rate,revealing the mechanism of lubricating oil film shrinkage,establishing a mathematical model of belt displacement torque,and then calculating and analyzing the belt displacement torque of oil-free groove type,radial oil groove type,and radial spiral composite oil groove type.(2)In view of the dynamic changes of the flow field between the plates,the shrinkage phenomenon of the lubricating oil film between the plates under different working conditions is deeply studied,and based on the VOF two-phase flow model and the heat-fluid coupling model,the distribution of the lubricating oil in the flow field between the friction plates and The temperature rise situation is simulated and analyzed,and the influence of parameters such as the speed difference between the plates,the lubricant flow rate,the lubricant inlet oil temperature,and the lubricant density on the characteristics of the lubricant flow field is studied and analyzed.(3)Combining the dynamic research results of the flow field,considering the trend of the torque of the wet clutch with multiple factors,the friction plate structure is studied,and the sensitivity analysis of the lubricating oil material properties and the influence factors of the plate spacing is carried out,and the different influence factors are compared.Sensitivity determines the biggest influencing factor of the strip torque in the flow field between slices.(4)Taking the inclined spiral compound groove as the research example,the main geometric parameters are analyzed and researched with the goal of reducing the torque,which provides a reference for the design of the structure parameter of the friction plate oil groove;the calculation model of the clutch oil circuit flow field is established,and the response surface method is adopted.The oil supply circuit is optimized,and the optimal design parameters of the oil circuit are obtained.Aiming at the research on the dynamic change of the flow field between the plates and the belt-discharge characteristics of the wet clutch under the discharging condition,the method of combining theory and numerical simulation is used,and based on this,the wet clutch oil groove parameters and oil supply circuit are studied.In order to reduce the air loss power of the wet clutch,It provides a reference for reducing the air loss power of the wet clutch.