修形渐开线斜齿轮啮入冲击计算

To calculate the mesh-in impact force of modified involute helical gears more accurately, a calculation method of mesh-in impact force for modified involute helical gears is proposed. Based on the tooth contact simulation, the "tooth surface-tooth surface" contact simulation model without edge contact of gears and the "tip point-tooth surface" contact simulation model with edge contact of gears are set up in consideration of the base pitch difference which is caused by the tooth surface modification and loaded tooth deformation, and the results of the variation of mesh-in impact position in both the tooth profile and the longitudinal directions with loads are calculated. The mesh-in impact force is calculated according to the energy conservation at the moment of teeth coming into contact. An optimal design model of tooth modification is set up based on the proposed method and the genetic optimization algorithm. Combined with an example, an optimal design of tooth modification with minimum mesh-in impact force is completed. The results show that both rotation speed and load have great effects on the mesh-in impact force, and the mesh-in impact force of the modified gears is reduced effectively within the set load range. Rapid increase of mesh-in impact force may be caused by the edge contact of gears and should be avoided in the design of tooth modification.