Immersed Oil Lubrication Data Analysis Based on Fluid-structure Coupling Gearbox
In order to investigate the internal lubrication of locomotive gearbox and the influence of different factors on the internal flow field,it is necessary to accurately calculate the oil distribution in the oil-immersed lubrication of gearbox.Based on the fluid-structure coupling theory,the RNG k-ε model and VOF model of the internal flow field of locomotive gear box are established,and the lubricating oil distribution law is obtained in quasi-steady state.In addition,the influence of speed,initial oil amount and initial oil temperature is analyzed on the flow field inside the gearbox.The results show that the internal oil is distributed uniformly at high speed and aggregated at low speed.The increase of rotational speed,immersion depth and initial oil temperature will cause effective oil concentration increase in the internal flow field and tend to be flat.Among the three factors,the increase of speed has the most significant influence on the internal flow field,and the immersion depth has the most influence on the effective oil concentration,and the oil temperature has the least influence on the internal flow field.According to the normalization of the steady-state simulation results,the maximum comprehensive lubrication index under the working conditions of speed,oil quantity and oil temperature is 2.48,2.34 and 2.34 respectively,corresponding to the working conditions of speed of 1 656 rpm,oil quantity of 2 h and oil temperature of 60℃.The reference suggestions for oil-immersed lubrication of gear box are put forward.
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