| To overcome the difficulties of speed control of the large slope mountainous orchard gravity -powered
transporter, an adaptive damping device was developed, which could make the shipping box decline uniformly along the
wire rope track. By analyzing the movement and force of the gravity transmission and brake shoe, established the dynamic
model of adaptive damping device in uniform braking phase, and deduced the torque equation of the wheel and brake shoe.
According to equilibrium conditions, the relationship between the various physical quantities was obtained. Analysis showed
that brake torque only had relation with the speed, and the relationship between them was a quadratic function; Carrying
capacity and the cube of transmission ratio were proportional. Changes in the carrying amount had little effect on the rate
of decline of the shipping box. Through the test, effect of speed on the braking torque was gotten, which was consistent with
the kinetic model. As the temperature condition of the brake drum had great influence on the friction effect, designed the
radiator and made an experiment, and obtained the maximum speed and torque when brake drum could maintain
temperature balance, which were 820 r/min and 46 N窑m, and they were consistent with the application requirements. |
