摘要
外啮合齿轮泵在高黏度工况下经常存在泄漏流、二次流等不稳定流动现象,对齿轮泵的运行产生很大影响。为了探索这些不稳定涡量的特性,对外啮合齿轮泵内不稳定涡量的流动特性进行分析。结果表明:黏度的增加可以改善齿轮泵内的流动状态,但会导致齿轮泵内的高压区和低压区明显增加,而出口流量逐渐减小;黏度越大泵出口流量变化趋于稳定需要的时间更长;在一个周期内,吸油腔的进口位置从没有旋涡到出现大小相等旋转方向相反的旋涡,旋涡逐渐增加随后脱落消散;从T_(0)+1/5T时刻开始,较大的旋涡出现在齿轮啮合处和排油腔内,且在排油腔内形成明显的“马蹄形”涡;黏度越大,齿轮泵在一个周期内同一位置的旋涡强度越小。
Due to the leakage flow,secondary flow and other unstable flow phenomena often exist in the external gear pump under high viscosity conditions,which have a great impact on the operation of the gear pump.In order to more accurately explore the characteristics of these unstable vorticity,the flow characteristics of unstable vorticity in the external gear pump was analyzed.The results show that the increase of viscosity can improve the flow state in the gear pump,but the high pressure and low pressure areas in the gear pump increase obviously,and the outlet flow decreases gradually.The greater the viscosity,the longer it takes for the pump outlet flow to stabilize.Within a cycle,the inlet position of the oil suction chamber changes from no vortex to the appearance of vortexes of equal size and opposite rotation direction,to the two vortexes becoming larger and finally falling off into several small vortexes.From the time T_(0)+1/5T,the larger vortex appears in the gear meshing and the oil discharge cavity,and an obvious"horseshoe"vortex is formed in the oil discharge cavity.The larger the viscosity is,the less the vortex strength of the gear pump becomes at the same position in a cycle.
作者
陈君辉
司国雷
陈川
史广泰
孙国栋
CHEN Junhui;SI Guolei;CHEN Chuan;SHI Guangtai;SUN Guodong(Sichuan Aerospace Fenghuo Servo Control Technology Corporation,Chengdu 611130 China;School of Energy and Power Engineering,Xihua University,Chengdu 610039 China)
出处
《西华大学学报(自然科学版)》
2025年第2期11-16,共6页
Journal of Xihua University:Natural Science Edition
基金
国家重点研发计划(2018YFB0905200)
成都市重点研发支撑计划(2021-YF08-00012-GX)。
关键词
黏度
齿轮泵
涡流
非定常计算
viscosity
gear pump
eddy current
unsteady computation
