Application of Cycloidal Cam Type Speed Reducers to Marine Gas Turbine Engines

摘要

The report covers the results obtained during the period March 1972 to June 1972 on a study program of cycloidal cam type transmissions. The objective was to provide design criteria for determining the maximum horsepower that can be transmitted using a cycloidal cam transmission for reduction ratios from 10:1 to 100:1 and input speeds from 500 to 12,500 RPM with a service life of 30,000 hours. From the analysis uncovered in the literature and that developed by GARD personnel a computer program was developed to optimize the cycloidal cam type transmission and analyze the stresses on the load carrying members. Contact stresses at the input crank shaft, reaction rollers and reverter pins were computed. Design limitations were assumed to be a rolling element contact fatigue stress limit of 200,000 psi, a roller bearing DN value of 1,300,000 and a maximum crankshaft shear stress of 50,000 spi. All transmission elements were assumed to be steel. (Author)