Structure Design And Performance Simulation Of The Oil-air Distributor

It is the incomparable advantage that the oil-air lubrication system, compared to the traditional lubrication mode, is applied more and more widely in the high speed and heavy load equipments, meanwhile is paid more and more attention to the research of the system, especially its component.Structure design, performance simulation and analysis of the distributor, one of lubrication critical components, are done in the basis of the theory of air-liquid two phase flow by using FLUENT software. The structure of oil-air distributor is designed and improved refer to the existing one. Diversion coefficients are defined as the indexes to evaluate performance of the oil-air distributor. Internal flow field of oil-air distributor is simulated, and the performance is analyzed by using the diversion coefficients, and then the influence of structural parameter on the distribution performance of improved oil-air distributor is analyzed. The results are obtained as follows,(1) The influence of the structure of oil-air distributor on distribution of the air is not obviously. The air phase diversion coefficients of the existing and improved oil-air distributor are almost equal to0.5, an ideal value, and their fluctuation is small. These conclusions show that the uniformity and stability of the existing and improved oil-air distributor are both meet the general engineering requirements.(2) The liquid diversion coefficient of the improved oil-air distributor is closer to the ideal value and its fluctuation is smaller because of the reduction of area among the distribution holes. These conclusions show that the uniformity and stability of the oil distribution get better in the improved oil-air distributor.(3) The uniformity of annular flow of oil and air at inlet has a great effect on the performance of oil-air distributor.(4) The area among the distribution holes has more important influence on the oil-air distributor performance than the taper of cone and the number of distribution holes on the distribution core while the annular flow of oil-air is uniform at inlet. However, if the annular flow of oil-air is not uniform at inlet, the number of distribution holes is the main effecting factor on the oil-air distributor performance, even the circle cavity formed by the distributing taper surface and the taper hole in the oil-air pilot block has an adjusting function to the flow pattern.