| Clutch is one of the core parts of the car,it is an important transmission mechanism of the car.Clutch quality also determines the stability of the car in the starting and driving process to a certain extent,the better the clutch performance,the more stable the vehicle.Limit the performance of the clutch friction plate in the main components are clutch,the purpose of this paper,combined with the optimization of friction plate,by optimizing the improved friction plate groove structure,and the new coating material,the optimized research of friction plate,using ABAQUS to friction plate groove and coating has carried on the finite element simulation,get the optimized data of lining,and again on the friction plate groove optimization.1)Optimization of friction plate first is resolved by means of calculation,because of the friction plate circular groove and radial slot performance is complementary,so combining the two grooves,can effectively improve the performance of the friction plate by using the national standard,combined with the data calculation,can get the lining thickness,outer diameter,inner diameter for the basic size and so on,through the characteristics of the radial slot,combined with Laplace equation,can obtain radial groove depth,width,quantity,and then through the mayor of equation combined with radial slot data,circular groove can be got through calculating the width,number,etc.2)Add excellent friction plate working surface coating is a kind of good method to improve the performance of,because of the excellent properties of polyimide have a lot,especially the friction and wear performance,when the zirconia is added in the polyimide/reduction of graphene oxide compound material can improve the friction and wear performance of polyimide again,when the polyimide composite friction and wear experiments in the oil,There is little wear and a reasonable coefficient of friction.According to dry friction and wear experiments,when the content of zirconia/reduced graphene composites in polyimide is about 1%,the friction coefficient and wear rate are the lowest and the performance is the best.According to the SEM scanning image,it is obvious that the abrasion marks at this time are the smoothest,and there is almost no debris and peeling.In the oil friction experiment,the pressure is set to 500 N and the experiment time is set to 1 hour.The experimental results show that the zirconia/r GO composite material is the best when the proportion of polyimide composite material is 1%,and the friction coefficient of the coating material is 0.142.Analysis of polyimide composite oil lubrication and friction coefficient increase before was smaller,according to the requirements of national standards,the higher the coefficient of friction,the stronger the ability to transfer torque of the clutch,combined with the performance of the coating material of dry friction,the wet clutch friction plate design selection of friction coefficient of 0.142,namely the content of Zr O2 / r GO 1% coating material,At this time,the friction performance of the wet clutch friction plate is the best.3)Because only data calculation can not fully explain whether the performance of the optimized friction plate is improved,it is necessary to carry out simulation calculation on the optimized friction plate.Firstly,the simulation on the friction plate and the protrusion part of the steel sheet shows that the stress and strain of the protrusion part have been improved after the optimization of the friction plate groove.As for the displacement cloud image,the displacement of the protruding part of the composite groove is 2.98 times that of the frictional plate without groove,which indicates that the protruding part of the composite groove friction plate needs to be optimized.The stress and strain of the composite groove friction plate are in the middle between the circumscribed groove friction plate and the radial groove friction plate,which indicates that the groove structure of the friction plate has a diffusion effect on the stress.The performance of steel sheet is better,and there is no need to optimize again.The simulation of the friction pair shows that the strain of the composite groove friction plate corresponding to the steel plate is 0.8 times that of the non-groove friction plate,which is beneficial to the steel plate,and the optimization of temperature is more obvious.The temperature of the composite groove friction plate is 0.15 times that of the non-groove friction plate,while the temperature of the composite groove friction plate is 0.9 times that of the circumscribed groove friction plate.The temperature of the circular groove friction plate is higher than that of the radial groove friction plate,which indicates that the optimal combination of the groove structure of the friction plate is indeed in line with the expectation.After the coating is added,the stress of the coated friction plate decreases by more than 2 times and the strain decreases by more than 10 times than that of the uncoated friction plate.Due to the heat absorption and heat insulation of the coating,the temperature of the optimized friction plate decreases by more than 10 times.The addition of coating on the friction sheet is also optimized for the steel sheet.The strain of the frictional sheet without groove is reduced by more than 3 times and the stress is decreased by more than 4 times,which can improve the life and working efficiency of the steel sheet.The displacement of the protruding part of the new friction plate is 0.3 times of that of the old friction plate,and the strain of the protruding part of the new friction plate is0.78 times of that of the old friction plate.It shows that the re-optimization of the friction plate is more successful,which can improve the life and performance of the friction plate. |
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