Prediction Of Residual Life Of Eccentric Shaft Of Jaw Crusher And Study On Its Service Reliability

As a kind of traditional crushing equipment,jaw crusher is widely used in the crushing of industrial raw materials.It is mainly used in the fields of sand and stone yard,mining,concrete mixing station and desulfurization in power plant.Every year a large number of crusher eccentric shaft retired,resulting in a waste of resources.As one of the important parts of the crusher,the eccentric shaft has a vital influence on the safety and reliability of the crusher.The research on residual life prediction and reservice reliability of eccentric shaft is not only a major technical problem for remanufacturing industrialization and large-scale development,but also a key problem for remanufacturing products to be widely accepted by the society.It conforms to the basic requirements of “vigorously developing the remanufacturing industry and implementing high-end remanufacturing,intelligent remanufacturing and in-service remanufacturing” proposed in “made in China2025”.It will also boost the development of Chinese manufacturing in the future.Aiming at the above problems,based on a company’s compound pendulum jaw crusher PE400×600 key parts of the eccentric shaft as the research object to carry out in-depth study.The main research contents include:(1)On the basis of summarizing the existing research at home and abroad,by comparing the common prediction methods of remaining life of remanufactured blank at present,the prediction method of remaining life of eccentric shaft,which is based on the dynamic theory and finite element simulation,is put forward.At the same time,the problems related to the remanufacturing of jaw crusher are briefly described.The prediction of residual fatigue life of eccentric shaft and its reservice reliability technique road map is given.(2)The virtual prototype model of jaw crusher is established.Using ADAMS simulation software to simulate the actual crushing process of jaw crusher.The process of calculating the change of the force of the bearing on the eccentric shaft with time.The variation curve of output with time is analyzed,and the dynamic analysis of jaw crusher is completed.The eccentric shaft fatigue load spectrum is obtained through data processing and transformation.(3)Combining the equivalent life of the eccentric shaft to predict the residual fatigue life of eccentric shaft.The fatigue life prediction of eccentric shaft is the research focus.According to the eccentric shaft statics analysis and dynamic analysis of the stress results of the eccentric shaft and load time history,to predict the fatigue lives of eccentric shaft.(4)A parameterized model of laser cladding layer for eccentric shaft remanufacturing is established.The structure size and material properties of cladding layer are optimized by Multi-objective Genetic Algorithm.The reliability calculation model considering the correlation between stress and deformation is established.Using six sigma verify the feasibility of remanufacturing scheme design standards.The research work of this paper provides a theoretical basis for the residual life prediction of eccentric shaft of jaw crusher and its reservice reliability research,and provides an important reference basis for the subsequent related research of the same series of products.