摘要
为提高双圆弧斜齿轮泵在高速高压工况下的流量品质,减小流量脉动对振动、噪声等问题的影响,文中通过理论推导流量脉动系数公式,得到齿轮各参数与流量脉动之间的关系,进而对齿形参数进行优化设计,使得流量脉动系数理论为零。采用流体动力学(CFD)仿真,对双圆弧斜齿轮泵内部流场进行数值模拟,与试验结果进行对比验证。结果表明:螺旋角为31.3°时,脉动系数为零,实现了新型双圆弧斜齿轮泵理论上无流量脉动;转速为5 000~12 000 r/min,出油口流量脉动基本为零,验证了理论设计的正确性及满足了齿轮泵高速化后的性能要求;负载压力为5~25 MPa,出油口流量脉动基本为零,满足了齿轮泵高压化后的性能要求;试验结果与仿真结果流量误差在3%左右,说明了仿真结果的正确性及双圆弧斜齿轮泵泄漏量少,容积效率高。
In this article,in order to improve flow quality of the double circular-arc helical gear pump with high speed and high pressure and reduce the influence of flow pulsation on vibration and noise,efforts are made to derive the formula of the flowpulsation coefficient and explore the relationship between the gear parameters and flow pulsation;the tooth-profile parameters are subject to optimal design.As a result,the flow-pulsation coefficient reaches zero theoretically.The simulation of computational fluid dynamics(CFD)is carried out on the double circular-arc helical gear pump's internal flow field.These results are compared with those obtained from the experiments.It is shown that when the helix angle is 31.3°,the pulsation coefficient is zero,and the new double circular-arc helical gear pump has no flow pulsation theoretically.When the speed is from 5000 r/min to 12000 r/min,the flow pulsation at the oil outlet is basically zero,which has verified that the theoretical design is correct and the performance requirements of the high-speed gear pump are met.When the load pressure is from 5 to 25 MPa,the flow pulsation at the oil outlet is basically zero,which meets the performance requirements of the high-pressure gear pump.The flow error between the experimental results and the simulation results is about 3%,which shows that the simulation results are correct on one hand and the double circular-arc helical gear pump has less leakage and high volume efficiency on the other hand.
作者
董庆伟
刘理想
李阁强
周群起
DONG Qingwei;LIU Lixiang;LI Geqiang;ZHOU Qunqi(College of Agricultural Equipment Engineering,Henan University of Science and Technology,Luoyang 471003;College of Mechanical and Electrical Engineering,Henan University of Science and Technology,Luoyang 471003;Henan Collaborative Innovation Center for Advanced Manufacturing of Machinery and Equipment,Henan University of Science and Technology,Luoyang 471003)
出处
《机械设计》
CSCD
北大核心
2023年第5期21-26,共6页
Journal of Machine Design
基金
河南省重点研发与推广专项(科技攻关)项目(20210221027)。
关键词
双圆弧齿轮泵
高速高压
流量脉动
流场仿真
试验验证
double circular-arc helical gear pump
high speed and high pressure
flow pulsation
flow-field simulation
experimental verification
