In order to improve the performances and work reliability of the multi-layer interference connection parts,based on traditional design methods,an improved design method was given.In accordance with the order from the inside to the outside,thick-wall cylinder theory and the Lame equation were used to calculate the pressure and interference fit amount of spindle-to-bushing contact surface.The checking method of the bushing was used to calculate the bushing-to-inner ring contact surface,and the inner-ring stress analysis method was used to calculate the inner-to-outer ring contact surface.Compared with traditional design method,the proposed method fully takes into the consideration of the influences of various design parameters,and the calculated results coincide with the actual simulation results,the error is smaller and the accuracy is higher.Ultimately,the test was also designed to verify whether the shrink disk could bear the load or not during the actual operation, and the results showed that it could meet the requirements of given loadcase.
