An Interference Fit Algorithm for Multi-layer Thick-Walled Cylinders

Abstract

Interference fit is an important contact mode used for torque transmission, which exists widely in engine design, such as the contacts between the main bearing seat and the engine body, the engine bearing liner and the camshaft bearing seat, the cam and the hollow camshaft and so on. To prevent trackslip, a certain magnitude of interference has to be ensured; meanwhile, the interference needs to be controlled to avoid failure of the mechanical components caused by high pressure. Hence, to transmit torque effectively, the interference fit should be within a reasonable range. Although each country has its own national standard for interference fit, they are either too coarse or too confined for application. An easier interference fit algorithm for concentric cylinders with more flexible and popular application is established in this study. Furthermore, the algorithm is adopted to design a new electronically controlled diesel engine.