履带式车辆液压机械驱动系统的设计

Study on Hydro-mechanical Transmission of Tracked Vehicles

履带式行走具有降低接地比压和防止下陷的优点。履带式车辆的转向普遍采用离合器和制动器,结构简单,但存在转向费力、不能实现原地转向的缺点。为此,采用液压机械式双流传动系统,功率由两套静液压系统分流进入变速装置,经动力差速式转向机构进行功率汇合,能够实现履带车辆的无级转向和无级行走。动力差速式转向机构具有降速增扭作用,转向时实现一侧扭矩增加而另一侧扭矩等量减少。

Tracked vehicle has the advantages of reducing the ground pressure and avoiding sinking. Tracked vehicles adopt clutch and brake which has the advantage of simpleness and has the disadvantage of difficult to be turned and can＇t turning at original point. The paper studies on the transmission system that avoids that disadvantages and realizes continuous walking and continuous turning. The study adopts hydro-mechanical transmission that power is divided into two paths by two hydraulic transmissions, passes through reducer respectively and converges at differential steering system. Differential steering system increases torque and decreases velocity, increases one side＇s torque and decreases the other side＇s torque equally when the vehicle is turning.