| 拖拉机液力机械式无级变速器的研究 |
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| 引用本文： | 王应宽,陈军,白友仁.拖拉机液力机械式无级变速器的研究[J].农业工程学报,2000,16(2):75-79. |
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| 作者姓名： | 王应宽 陈军 白友仁 |
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| 作者单位： | 1. 农业部规划设计研究院
2. 西北农林科技大学 |
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| 摘 要： | 提出了一种新的组合式无级变速传动方案——液力机械综合式无级变速传动,由综合式液力变矩器、链无级变速器、减速齿轮组及相应的操纵控制机构组成。用该传动方案改进设计拖拉机的传动系,设计出了具有良好性能的液力机械式无级变速器。通过液力变矩器可自动无级变速变扭以适应外界变工况作业;通过链无级变速器和负载换档可实现由驾驶员控制的无级变速,因而整车能实现可控自动无级变速,在外界负荷频繁变化条件下发动机始终工作在标定工况附近
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| 关 键 词： | 拖拉机 无级变速 液力变矩器 链无级变速器 负载换档 |
| 收稿时间： | 4/8/1998 12:00:00 AM |
| 修稿时间： | 1998-04-08 |
Study on Hydromechanical Continuously Variable Transmission for Tractors |
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| Wang Yingkuan,Chen Jun and Bai Youren.Study on Hydromechanical Continuously Variable Transmission for Tractors[J].Transactions of the Chinese Society of Agricultural Engineering,2000,16(2):75-79. |
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| Authors: | Wang Yingkuan Chen Jun and Bai Youren |
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| Abstract: | On the basis of studying the historical development & present situation of Continuously Variable Transmission (CVT) at home & abroad, a new combined continuously variable drive scheme was designed, i.e. a hydromechanical CVT. The new CVT is composed of a Single stage Twinphase Torque Converter (STTC), Continuously Variable Chain Transmission (CVCT),reducing gears and their corresponding Hydraulic Clamping & Control Systems (HCCS). The new CVT is employed to improve the main drive of Shanghai 50 tractor which has a broad application and high market share. The comprehensive hydromechanical CVT with fair good performance has been laid out by using the thoughts and methods of Green Design & CAD. The torque converter can change the speed and torque automatically and steplessly as the working occasion demands. The driver can also adjust the CVCT by means of the HCCS and shift under load to change the speed continuously. Thus, automatical & controllable continuously varying speed can be realized, which ensures the diesel engine to work always around at the rated condition with the best fuel economy & power performance. The study & design showed that the newly designed CVT can be utilized to improve the overall operation performance of tractors and analogous vehicles such as fuel economy, power performance, driveability, comfortability, safety, acceleration, field crossing, less toxic exhaust emission, etc. |
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| Keywords: | tractor continuously variable transmission hydrodynamic torque converter continuously variable chain transmission shift under load |
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