智能铺轨机牵引车液压转向系统建模分析  

Modeling and Analysis of Hydraulic Steering System of Tractor of Intelligent Track Laying Machine

作　　者：沈光华 陈志远 Shen Guanghua;Chen Zhiyuan(The 8th Engineering Branch of China Railway 4th Engineering Group Co.,Ltd.,Hefei 230041,China)

机构地区：[1]中铁四局集团有限公司第八工程分公司,安徽合肥230041

出　　处：《科学技术创新》2022年第7期159-163,共5页Scientific and Technological Innovation

摘　　要：为实现智能铺轨机牵引车自动循迹行走,对转向系统响应特性要求越来越高。通过分析转向机构的结构组成和工作原理,建立阀控非对称缸全液压转向的动力学模型和AMESim仿真模型,仿真分析转向油缸伸缩到左右极限位置时系统的工作特性。结果表明:转向液压系统在0.15s时间内就能完成建压,响应快速;转向油缸有杆腔工作压力明显大于无杆腔工作压力,接近系统最高工作压力21MPa;右车轮右转到极限位置并复位分别需要1.1s与1.05s;左车轮左转到极限位置并复位分别需要0.95与0.9s;右车轮转向角度变化范围为-22°-26.5°,左车轮转向角度变化范围为-19°-34°,左右偏差较大;所建模型可以为转向机构几何参数与液压元件参数匹配优化提供指导。In order to realize the automatic tracking of the tractor of the intelligent track laying machine,the requirements for the response characteristics of the steering system are higher and higher.By analyzing the structural composition and working principle of the steering mechanism,the dynamic model and AMESim simulation model of valve controlled asymmetric cylinder full hydraulic steering are established,and the working characteristics of the system when the steering cylinder expands to the left and right limit positions are simulated and analyzed.The results show that the steering hydraulic system can complete the pressure build-up in 0.15s,and the response is fast;The working pressure of steering cylinder with rod chamber is significantly higher than that without rod chamber,which is close to the maximum working pressure of the system of 21MPa;It takes 1.1s and 1.05s for the right wheel to turn right to the limit position and reset respectively;It takes 0.95 and 0.9s respectively for the left wheel to turn left to the limit position and reset;The change range of the steering angle of the right wheel is-22°-26.5°,and the change range of the steering angle of the left wheel is-19°-34°;The model can provide guidance for the matching and optimization of geometric parameters of steering mechanism and hydraulic components.

关 键 词：智能铺轨机牵引车 转向系统 建模 仿真 动力学 

分 类 号：TH137.5[机械工程—机械制造及自动化]