Design Method And Performance Test Of Long Arc Spring In Dual-mass Flywheel Shock Absorber

In the process of driving a car,there will be chaotic torsional vibration between the engine and the transmission system and bring about various noise problems.These problems have a direct impact on the pleasure and comfort of driving,and because the resonance generated by the power transmission system will damage or invalidate the car parts,it will pose a hidden danger to the safety of the car.The application of dual-mass flywheel shock absorber in transmission system can effectively relieve the torsional vibration and noise in the driving process of automobile power system.The torsion characteristic of long arc spring is very important in the process of attenuation vibration of Dual-mass flywheel shock absorber.The design and machining of long arc spring directly influence the vibration absorption performance of Dual-mass flywheel.Based on the research and development of the dual-mass flywheel shock absorber project,this paper combines the technology of structure and principle,design and calculation,production technology,and test and verification of the dual-mass flywheel shock absorber.The design methods and performance testing techniques of long arc spring such as parameter design,theoretical calculation,material selection and processing technology are studied.At the same time,reference is provided for enterprises to build a standardized research and development platform of "Dual-mass flywheel shock absorber".(1)In this paper,the 3D mode design of the long arc spring is carried out through the 3D mode of the Dual-mass flywheel shock absorber designed by vehicle parameters and the size of the original cast iron flywheel.The complete three-dimension module design plays an important role in the simulation of the long arc spring.Through the selection of design coefficients and 3D model design parameters,the dimensions,stiffness,frequency and other values of the long arc spring are calculated in detail.(2)This paper uses one-dimensional simulation software AMEsim to establish a vehicle simulation system model to simulate the vibration absorption effect of the dual-mass flywheel shock absorber.At the same time,combined with the performance test and endurance test data of the Dual-mass flywheel shock absorber,the verified design results of the Dual-mass flywheel shock absorber meet the design requirements.The dynamic stiffness of the Dual-mass flywheel shock absorber is stable,the shock absorption effect is obvious,and the fatigue endurance performance meets the requirements of the Dual-mass flywheel.(3)Using the NVH test method of the vehicle,by comparing the vibration absorption and vibration isolation effects of the two stiffness dual-mass flywheel shock absorbers under different driving conditions,and on the basis of test test data and subjective evaluation and analysis results,It is determined that the design and processing of the Dual-mass flywheel shock absorber meet the matching requirements of the entire vehicle NVH.According to the arc spring designed in this paper,the vehicle matching test of the Dual-mass flywheel shock absorber is passed,and it can meet the requirements in terms of vibration isolation effect and durability.The design and development method proposed in this paper has been applied to the design and manufacture of new products.