Numerical Simulation And Experimental Study On Damping System Of Washing Machine

Vibration and noise are important indicators for evaluating the quality of washing machines,and vibration is the main source of noise.The problem of vibration and noise in the operation of the washing machine is prominent and urgently needed to be solved.The liquid balancer and rod are the main damping systems of the washing machine.In this paper,the theoretical analysis,numerical simulation and laboratory tests were combined to study the liquid balancer structure and rod parameters of a certain type of washing machine.The influence of its vibration characteristics and parameter optimization improve its vibration characteristics.Firstly,by establishing the mathematical model of the liquid balancer,it is concluded that the increase in the number of race helps to improve its damping performance,which provides a theoretical basis for the design of the liquid balancer,and then establishes the vibration model of the suspension system,laying the foundation for simulations.Secondly,FLUENT software is used for secondary development of the program.Using FLUENT software to study the effect of structural parameters of the liquid balancer on the damping performance,it can be seen that increasing the number of ribs will improve the damping performance of the balancer in the transient stage,but the steady stage is the opposite;The outer hole of the ribs helps to improve the damping performance and the stability of the balancer.The inner hole helps to improve the damping performance and service life of the balancer;The optimal width ratio of the two-races balaner is 50%;The optimal volume ratio of the balancer is 55%.Based on theoretical analysis and simulation results,a improved liquid balancer was designed.Simulation and experimental results show that the improved liquid balancer has better damping performance and longer service life than traditional liquid balancer.The parametric study of the liquid balancer was carried out with the multi-body dynamics test platform of the suspension system.The test results are in agreement with the simulation results.Thirdly,the ADAMS software is used for secondary development of the program.Using ADAMS software to study the influence of the key parameters of the suspension system on the amplitude of the tub and the force of the box,it can be seen that the damping coefficient has the greatest impact on the optimization target,and the weight is the second,the stiffness coefficient is last.The amplitude of the suspension system after the parameter optimization is reduced by about 13%,and the vibration characteristics are significantly improved.At the same time,the parametric study of the suspension system was performed.Finally,performance tests were performed on the 550 washing machine equipped with an improved damping system.The amplitude of the 550 washing machine is 30%lower than that of the washing machine equipped with the original damping system,and the effect of vibration reduction and noise reduction was significant.After popularization and application,it was well received by users.This paper optimized the key parameters of the liquid balancer and the suspension system,improved the performance of the damping system,reduced the vibration and noise during the operation of the washing machine.It provides important theoretical and practical significance for the design and development of washing machine.