Research on power loss of friction pair of axial piston pump under standby condition with low pressure
Piston pump is the power core of the hydraulic device of special vehicles,and in the standby condition,due to the reduction of pressure,the lubrication performance will be reduced,and the power loss of friction pair will become larger,which not only does not save energy,but also will reduce the life and reliability.In order to let axial piston pumps have better performance in energy saving,lifespan and reliability in low-pressure standby,as well as to put forward substantial suggestions for engineering practice and structural optimization,for a certain type of axial piston pump,the theoretical research of compression coefficient about valve frictional pair and the slipper frictional pair,as well as experimental research on the power loss in standby condition were carried out.The analysis showed that the compression coefficient of the valve frictional pair and the slipper frictional pair increased gradually with the decrease of the outlet pressure.When the pressure was lower than 2 MPa,the compression coefficient increased sharply.According to the power loss test and 100 h endurance test under low pressure of the axial piston pump,when the pressure was lower than 2 MPa,the friction power loss of the piston pump increased by 0.8 kW,and the valve pair and the slipper pair wore seriously,which was consistent with the theoretical research.If the piston pump works in this state for a long time,it would lead to serious wear of the frictional pair,resulting in reduced life of the axial piston pump.It was suggested the outlet pressure of axial piston pump to be higher than 2 MPa when the machine was on standby.
standby with low pressureaxial piston pumpvalve frictional pairslipper frictional pairpower loss
NETL
NSTL
万方数据
