Effects of External Load on the Flow Field Characteristics and Strength of the Slipper Pair of a Radial Piston Pump
Aiming at the problem of slipper failure in high-pressure and large-displacement radial piston pumps,the effects of ex-ternal load on the pressure,flow rate,leakage of fluid domain and structural strength of the slipper were studied by numerical calcula-tions and fluid-solid coupling simulation,considering the characteristics of oil viscosity,temperature and pressure.The results show that the pressure distribution and values in the oil suction area fluid domain of slipper pair remain mostly constant when the external load in-creases from 1.1×108 N to 1.2×108 N.The pressure in the central oil cavity of the slipper increases by 1.5 MPa,which expands the high-pressure area of the oil film in the fluid domain and increases the oil pressure by 0.05 MPa.These changes cause a slight increase in the velocity of flow.Main leakage of the slipper pair occurs at the boundary,and the leakage from the high-pressure and low-pressure damping holes is negligible.An increase in external load results in increased leakage at all three locations,causing a rise in the total leakage of a single slipper pair by 0.05 mL/s.The research indicates that the external load has a negligible impact on the strength of the slipper.The maximum stress and deformation occur in the central oil cavity when the slipper lies in the oil discharge area,which is the weakest part of the slipper structure.
NETL
NSTL
万方数据
