Kinematics Parameter Calculating Method for Spherical Swashplate Type Axial Piston Pump with Incline Piston

Kinematics parameters calculation is the basis of piston pump design and performance analysis.Taking axial piston pump with incline piston and spherical swashplate as the research object,owing to using linearization,current formula for calculating piston pump kinematics parameters which include displacement,velocity and acceleration is inaccurate.In this paper,according to piston pump part motion geometry relationship,a correction algorithm is deduced,the analyse method and deduction procedure ensure the new calculating formula are precise in theory.Applying above formula and current calculating formula to same aeroengine fuel axial piston pump,results show that current calculating method displacement error is less than 0.041 percent,velocity error is less than 0.182 percent,the maximum acceleration error is 2.67 percent.Compared with current calculating method,the new calculating formula is precise,it can be used in the kind of piston pump kinematics parameters calculation and current calculating method evaluation.