毕业设计（论文）-履带拖拉机无级变速器设计（换档离合器设计）（含全套CAD图纸）.docVIP

履带拖拉机无级变速器设计（换档离合器设计） 摘 要 本文介绍了设计的内容和设计指导思想，本次设计的内容是设计履带拖拉机无级变速器—换档离合器设计，重点介绍和分析研究了离合器，并在设计中根据不同的工况进行的设计，特别介绍了一种新型的无级变速装置—液压机械无级传动，也是一种双功率流无级传动系统，具有无级调速、高效率的特性，是大功率车辆较理想的传动方式。液压机械无级变速器是一种液压功率流与机械功率流并联的新型传动装置，通过机械传动实现传动高效率，通过液压传动的可控调速与机械传动相结合实现无级变速。该装置的采用能大幅度地提高车辆的动力性、经济性和操作自动化水平。湿式多片离合器是动力换档拖拉机传动装置中主要部件之一。湿式多片换档离合器是动力换档拖拉机传动装置中主要部件之一。对该离合器结构设计特点做了系统地论述，对摩擦片、回位弹簧、快速排油阀等关键部件进行了设计，对冷却润滑的实现及密封装置的选择，并对离合器的扭矩容量、热容量及其寿命进行了分析计算。 关键词：拖拉机，液压机械传动，负载换挡，湿式多片离合器 DESIGN OF CONTINUOUSLY VARIABLE TRANSMISSION OF TRACKED TRACTOR (DESIGN OF WET SHIFT CLUTCH) ABSRACT The design content and the design guiding ideology are introduced in this paper. This design content is the design wet shift clutch of tracked tractor stepless transmission gearbox. The hydro-mechanical continuously variable transmission (HMCVT) is a new type transmission device, which consists of a mechanical transmission (MT) combined in parallel with a hydrostatic transmission (HST) featuring a pair of hydraulic units. The HMCVT has a continuously variable shifting ratio by the combination of HST and MT and achieves high efficiency by MT. This device can greatly improve power and fuel economy characteristics and operation automation level of vehicle. The wet multi-disk shifting clutch is one of main parts of power-shift tractor’ gearing. This paper discusses systematically the structural design features of this clutch, including the design of key parts such as friction plate, return spring and quick draining oil valve, the implementation of cooling and lubrication and the selection of sealing devices. The analysis and calculation of torque capacity, heat capacity and service life of this clutch are also carried out. Key words: tractor, hydo-mechanical stepless transmission, load shift, wet multiple disc shift clutch 目 录 第一章 前 言.......................................................1 第二章 液压无级变速器传动方案的设计...............3 §2.1 设计任务及已知条件 .......................3 §2.2 液压无级变速传动方案的选择................3 §2.3 传动参数的确定 ............