Simulation Optimization Analysis Of Steel Frame Of Self-Driven Car Wash Equipment

As the number of cars has increased dramatically,the additional car wash industry has also grown rapidly.This paper conceives and designs a self-driving car wash device that eliminates power support and directly uses the wheel of the vehicle to be cleaned.The self-driven car wash cleaning equipment is mainly divided into two parts: one is a steel frame welded by channel steel,a structural part composed of a steel plate and a transmission member;and the second is a plunger linked to the transmission member.A spray part consisting of a pump,a washing hose,a fan nozzle,and the like.This paper is responsible for the design of the structural part and subsequent optimization work.The designed part is optimized by CREO and ANSYS software for parametric modeling and finite element analysis.In the structural part: the steel frame is symmetrical,and the two symmetrical parts are divided according to the requirements of the force deformation.After the structural dimensioning is completed,the steel frame and the drum are optimized to find the optimum channel section size model for the structural part.The result of the optimization analysis is that the front bracket should adopt the No.5 channel steel,and the thickness of the bracket should be thick.Take 5 mm.The rear brackets are made of channel No.5 to No.10 due to different deformation requirements.For rotating parts on steel frames,the drum and one-way bearings are mainly analyzed.After optimization,the minimum diameter of the drum shaft is ?18mm,and the wall thickness of the drum is 3.5mm.At this time,the fatigue life of the ?18 mm stepped shaft is 8520000 rpm.The one-way bearing has both the effect of sharing the load and the reverse rotation.Therefore,it is divided into two parts: one is to support the rotating part,the finite element is used to calculate the contact stress between the rolling element and the inner and outer ring(inner ring 1972 MPa,outer ring 1788 MPa),and Hertz contact stress(inner ring 2049.60 MPa,outer ring 1901.14 MPa)comparison,found that the numerical solution and the theoretical value error is below 10%,and the theoretical value exceeds the theoretical assumption of the condition range: the tightness is large.Finally,the numerical solution is the exact value.The fatigue life of the inner ring of the one-way bearing is calculated based on the numerical solution: 73600000 rpm.The second is the backstop part.The numerical simulation of the contact stress between the backstop and the inner and outer rings shows that the maximum contact stress(190.34 MPa) is small compared to the allowable contact fatigue stress of the bearing steel(2000 MPa),which fully meets the requirements for use.In the design,the overall structural dimensions are the same,the section size of the channel used in the steel frame is taken as a variable,and the optimal parameters satisfying various conditions are optimized.In the calculation of structural contact stress and fatigue life,not only the numerical method,but also the corresponding theory is used to calculate and compare to verify the accuracy of the numerical solution.Figure [54] table[18] reference[62].