某水下打桩锤主控阀缓冲装置建模与仿真

Modeling and Simulation of Buffer Device in Main Control Valve of Hydraulic Pile Hammer

为研究某水下打桩锤缓冲装置的结构对主控阀缓冲性能的影响,介绍缓冲装置的结构组成和缓冲原理,考虑液压油泄漏导致主控阀腔内压力和温度的变化,结合热力学和流体动力学理论建立缓冲装置的动态数学模型,基于MATLAB/Simulink软件搭建仿真模型并进行仿真分析,研究液压系统回油背压、缓冲腔直径、泄漏缝隙高度和长度等参数对缓冲性能的影响规律。结果表明:打桩锤主控阀缓冲装置的泄漏缝隙高度、泄漏缝隙长度和缓冲腔直径对缓冲性能的影响显著,液压系统的回油背压影响相对较小。研究结果为主控阀缓冲装置的设计和结构参数的优化提供理论依据。

In order to study the influence of the structure of a hydraulic pile hammer buffer device on the buffering performance of the main control valve,the structure composition and buffering principle of the buffer device are introduced.Considering the changes of pressure and temperature in the main control valve chamber caused by the hydraulic oil leakage,a dynamic mathematical model of the buffer device is established by combining the theory of thermodynamics and fluid dynamics.The simulation model is built based on MATLAB/Simulink software and the simulation analysis is carried out to study the influence rule of the hydraulic system oil return back pressure,buffer cavity diameter,leakage gap height and length and other parameters on the buffer performance.The results show that the height of the leakage gap,the length of the leakage gap and the diameter of the buffer chamber of the buffer device of the pile hammer main control valve are of a significant influence on the buffer performance,while the influence of the oil return back pressure of the hydraulic system is relatively small.The research results provide a theoretical basis for the design of the buffer device and the optimization of the structural parameters of the main control valve.