Dynamic Performance of Rotary Tilling Tractor with a Feedback Power

从发动机到旋转轴的动力传递系统是一个闭环系统，其中包括通过驱动轮轴的反馈动力。理论分析和土仓试验结果如下：1)推导了旋耕机阻力反馈功率、回耕功率和行驶功率的预测方程。2)建立了发动机到转轴的动力传递效率公式。3)为了验证这些方程的适用性，明确旋耕机阻力的实际值，制作了旋耕机阻力、发动机功率和车轮功率的测量系统。利用该系统进行了土槽试验。4)根据试验结果，旋耕阻力方向为30-60°。从前进的方向。耕耕功率返回和反馈比、发动机-旋转功率传递效率分别为0.07 ~ 0.11、0.02 ~ 0.04、0.92 ~ 0.97、0.2 ~ 0.4和90%左右，均可由上述公式近似得到。

The power transmission system from an engine to a rotary tillage axle is regarded to be a closed-loop system including a feedback power through a driving wheel axle. The results obtained from theoretical analysis and soil bin tests are as follows:1) Equations for predictions of feedback- and return-powers and a travelling power from a rotary tillage resistance were derived.2) The power transmission efficiency from an engine to a rotary axle was formulated.3) In order to verify the applicabilities of these equations and clarify actual values of rotary tillage resistance, the measurement system for a rotary tillage resistance, the engine power and wheel powers was made. Soil bin test was performed by use of this system.4) According to the test results, the direction of rotary tillage resistance was 30-60deg. from the forward direction. The tillage power return and feedback ratios, and the engine-rotary power transmission efficiency were 0.07-0.11, 0.02-0.04, 0.92-0.97, 0.2-0.4 and about 90%, which were well approximated by the equations formulated above.