履带拖拉机液压控制差速转向系统设计与试验  

Design and Test of Hydraulic Control Differential Steering System for Crawler Tractor

作　　者：毛智琳 蒋建东[2] 章沈强 彭铭广 孙海平 卜洋 Mao Zhilin;Jiang Jiandong;Zhang Shenjiang;Peng Mingguang;Sun Haiping;Bu Yang(Xingguang Agricultural Machinery Co.Ltd.,Zhejiang Intelligent Agricultural Machinery Key Enterprise Research Institute,Huzhou 313017,China;Key Laboratory of Special Purpose Equipment and Advanced Manufacturing Technology,Ministry of Education,Zhejiang University of Technology,Hangzhou 310014,China)

机构地区：[1]星光农机股份有限公司浙江省智能农机重点企业研究院,浙江湖州313017 [2]浙江工业大学特种装备制造与先进加工技术教育部重点实验室,杭州310014

出　　处：《农机化研究》2022年第2期253-258,263,共7页Journal of Agricultural Mechanization Research

基　　金：国家重点研发计划项目(2018YFD0700702);浙江省智能农机重点农业研究院建设项目(2017Y20003)。

摘　　要：履带拖拉机控制液压变量柱塞泵的流量和方向驱动液压马达,液压马达动力和发动机传入变速箱的动力汇合,实现行驶和差速转向。现有技术存在两方面问题:一是倒车时方向盘转向和车辆驾驶习惯相反;二是在停车和行驶时会停不稳、行驶跑偏。为此,通过对液压油路进行设计和增设控制阀等方法,实现了倒车时正常转向功能;设计了双定位精准调节机构,使液压泵阀芯零位偏心量可调±2.0°,并在零排量处锁定。样机试验表明:操控方向盘倒车转向和常规车辆一样正常;停车稳定可靠,测定100m跑偏量≤3.5m,消除了安全隐患。The crawler tractor drives the hydraulic motor by controlling the flow and direction of the hydraulic variable Piston pump,and the power of the hydraulic motor meets the power of the transmission transmitted by the engine to realize driving and differential steering.The prior art has two problems:First,the steering wheel steering when reversing is contrary to the driving habit of the vehicle;Second,when stopping and driving,the vehicle will stop unsteadily and drive erratically.Through the design of hydraulic oil circuit and the installation of control valve,the normal steering function of reversing is realized,and the double-positioning precise regulating mechanism is designed,which makes the zero-position eccentricity of the valve core of hydraulic pump adjustable ±2.0°and locked at zero-displacement.After the prototype test,the steering wheel reverse steering is as normal as the conventional vehicle,the parking is stable and reliable,the 100-meter run deviation is measured≤3.5 meters,and the hidden danger is eliminated.

关 键 词：履带拖拉机 液压控制 差速转向 精准定位调节 

分 类 号：S219.2[农业科学—农业机械化工程]