Pressure distribution of combining center cavity slipper for axial piston pump

In order to improve lubricating characteristics of slippers in an axial piston pump, the combining center cavity slipper approach was proposed based on slipper shape and moving characteristic. The cylindrical coordinate was used in the lubricant area and mesh was made. The block-weight approach was implemented to deal with non-coincidence of mesh and shallow recess border in numerical method. The finite control volume method was applied in calculating pressure distribution. The flow conservation equation and film thickness model were resolved through Gauss-Siedel relaxation iteration. The calculation and analysis results indicate that compared to the slipper ① slipper pressure distribution is improved; ② hydrodynamic pressure of the combining slipper is greatly increased; ③ inclining degree is greatly reduced; ④ negative pressure in lubricant film disappear. So the combining center cavity slipper is lubricated better.