摘要
柱塞泵是特种车辆液压装置动力核心,在待机工况下,由于压力的降低,润滑性能会下降,摩擦副功率损失变大,不仅不节能,而且影响设备寿命和可靠性。为使轴向柱塞泵在低压待机时在节能、寿命、可靠性等方面都具有较好表现,针对某型号轴向柱塞泵开展配流副和滑靴副压紧系数理论研究及低压待机工况功率损失试验研究,并对工程实践和结构优化提出实质性建议。分析得出随着泵出口压力的降低,配流副和滑靴副的压紧系数逐渐增加,当出口压力低于2 MPa时,压紧系数急剧增加,会导致摩擦功率损失增加。通过对柱塞泵进行功率损失试验和100 h低压工况耐久试验得出,当出口压力低于2MPa时,柱塞泵的摩擦功率损失增大0.8kW,同时配流副和滑靴副有较严重磨损,与理论研究相符;若柱塞泵长期工作在此状态,会导致摩擦副严重磨损、柱塞泵寿命降低。建议主机在低压待命时,柱塞泵出口压力要高于2MPa。
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.
作者
郑旭阳
朱学彪
徐飞然
宋显国
王剑
ZHENG Xuyang;ZHU Xuebiao;XU Feiran;SONG Xianguo;WANG Jian(College of Machinery and Automation,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China;Jiujiang Seven Precision Electromechanical Technology Co.,Ltd.,Jiujiang 332000,Jiangxi,China)
出处
《农业装备与车辆工程》
2024年第8期129-131,152,共4页
Agricultural Equipment & Vehicle Engineering
关键词
低压待机
轴向柱塞泵
配流副
滑靴副
功率损失
standby with low pressure
axial piston pump
valve frictional pair
slipper frictional pair
power loss
