Research on Power Loss of Cylindrical Gear with Variable Hyperboloid Circular-arc-tooth Trace
The power loss of gears in actual operation is an important factor affecting their transmission efficiency.This paper will combine the theory of fluid mechanics,according to the structure and transmission characteristics of cylindrical gear with variable hyperbolic circular-arc-tooth trace(VH-CATT),establish a three-dimensional model with the FZG gearbox as a reference,and simulate and analyze the power loss of the VH-CATT cylindrical gear with air-liquid two-phase flow using the method of Smooth Particle Hydrodynamics(SPH).The flow and velocity fields of lubricating oil and air inside the gearbox under gas-liquid two-phase flow are obtained,and the influence mechanism of different rotational speeds,different lubricating oils and different oil immersion depths on the power loss of VH-CATT cylindrical gears is investigated,and the results are verified by the FZG test bench.The results show that:the higher the rotational speed,the higher the power loss of the gears;high viscosity lubricant has stronger dragging ability,which makes the gears lose more power;the power loss is positively correlated with the influence of the oil immersion depth,and the selection of the appropriate lubricant level can make the gears get better lubrication effect and produce smaller power loss.
cylindrical gear with variable hyperbolic circular-arc-tooth-tracepower losssmooth particle fluid dynamics methodFZG test bench
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