摘要
针对轮对压力检测不准确的问题,根据N-S方程推导了层流状态下油缸尾部与活塞杆处压力的差异性。运用MATLAB求解了层流状态下油缸内部流体的流场状态,并利用FLUENT软件及κ-ε模型仿真液压缸内部湍流状态,研究流体动力学因素对压力检测的影响。仿真和实验结果表明:油缸尾部静压与活塞杆处实际输出静压的差值会随着油缸活塞杆伸出长度的增加而增大,减少活塞杆伸出长度及对压力进行二次曲线拟合可以提高压装力检测准确性。
According to the accurate problem of the wheel pressure detection, the pressure difference between the tail of the cylinder and the piston was deduced according to the N-S equation. The laminar flow state of the liquid in the cylinder was analyzed by MATLAB and the internal turbulence of hydraulic cylinders was simulated by using dynamic mesh method and κ-ε model of FLUENT. The influence of hydrodynamic factors on pressure detection was studied. The simulation and experimental results indicate that the difference between the static pressure at the bottom of the cylinder and the actual output static pressure at the piston rod is increased with the extension length of the cylinder rod. Reducing the extension length of the piston rod and quadratic curve fitting of the pressure can improve the accuracy of the press force detection.
作者
肖峻
蒋鼎
杜兆勇
XIAO Jun;JIANG Ding;DU Zhaoyong(School of Mechanical and Electrical Engineering,Wuhan University of Technology,Wuhan Hubei 430070,China)
出处
《机床与液压》
北大核心
2019年第4期108-112,共5页
Machine Tool & Hydraulics
基金
湖北省科学技术研究与开发基金资助项目(201397289)
