| Roller bearing clutch is a new kind of frictional overrunning clutch. It has the characteristics of high load bearing capacity, wedged up tightly and reliably, long life and so on; at the same time it has the function of both clutch and bearing. And it can simplify the structure of the transmission, so it will be the new luminescent spot of the clutch technology's development. Roller bearing clutch has already been the mature product in the foreign country, and its fine performance has been confirmed in the experimental study and overseas application. At present, our country has not start to invest the roller bearing clutch's actual production. It has the vital significance for realizes the roller bearing clutch manufacture domestically,improves the level of design & manufacture of this kind of parts, reduces the differences to the advances of foreign and raises our country's development level of modernization of mechanical skill to study the roller bearing clutch.Firstly, this paper selectively analyzed the contact stress of the roller and the track influenced by the diameter of roller and the angle of the roller's axis and the track's axis by using the function of non-linear analyze in software ANSYS. And the rule curves about the maximum contact stress are obtained through the method of analyzing the stress value on different model.Secondly, the grease film thickness for the roller bearing clutch is analyzed according to Elastohydrodynamic Lubrication (EHL) and rheological theory. The formula and program for the minimum grease film thickness is given and it is successfully applied to calculate the minimum film thickness in the available product. The factors which influence the film thickness are analyzed. It may provide a basic theory to design the roller bearing clutch, control the manufacturing accuracy and improve the fatigue life and reliability of the roller bearing clutch. It has a significant value for theory and practicality.Finally, mathematic models of optimum design have been established and object functions in optimum process are base on dynamic load rating and the minimum film thickness. And the parameters have been optimized based on the mathematic models. Then the roller bearing clutch's three-dimensional models have been established based on the parameterization modeling function of Pro/E software, and its movement simulated and the interference inspected, to confirm the parameters which were optimized rationality. |
