ANALYSIS OF CONTACT STRESSES AND SLIP IN POWER SHIFT GEARINGS USING MULTI-CRITERION OPTIMISATION

摘要

The work analysed contact stresses and slippage occurring in specific toothed pairs of two power shift gearings with eight ratios. The analysed gearings have ratios of identical values. Differences in contact stresses and slippage values within individual toothed pairs of both gearings (at same values of input torque and engine speed) result from the internal configuration of the kinematic chains created by the toothed gears within individual gear ratios. The analysis included 5 characteristic contact points within the tooth engagement area. They were selected analytically depending on geometrical parameters of gears that constitute the toothed pair. Using computer-assisted design works that employ multi-criterion optimisation, it is possible to minimize slippage and take reasonable advantage of the fatigue contact durability of the material that was used for producing the toothed gears.