Performance analysis of meehanieal seal in aviation axial piston pump

Performance of mechanical seal in piston pump is directly affected by thermal elastohydrodynamic lubrication An accurate analysis of performance provides with theoretical foundation for further researches on its failure mechanism and remaining useful life. It's generally acknowledged that the oil wedge reflects the performance of seal. Researches on this field normally preset the thickness distribution of oil wedge and then continue study. But hypothetic wedge cannot display the real condition. In order to solve this problem, an original method is put forward in this paper depending on as less empirical equations as possible. Numerical simulation verifies the proposed models and obtains the results consisting of thickness of oil wedge, leakage rate and torque in different conditions, which in turn verifies the availability of the method if there are subsequent physical experiments. It's equally important that combining with finite element method, the proposed method can be appfied to other types of mechanical seals which are made of different materials or having different structures.