KINEMATICS OF THE DISC-BELT FLAX PULLING DEVICE

Abstract

The new design of the disc-belt flax pulling device, which will increase the durability of the pulling belts and reduce the material consumption of the flax pulling machine, is described in the article. The disc-belt flax pulling device consist of a prefabricated frame and dividers. The proposed flax pulling device and a transverse conveyor are located on the frame. Moreover, the flax pulling device is made in the form of active pulling discs that contact the pulling belts, each of which is mounted on two rollers, one of which is spring-loaded. The pulling belt does not transmit torque from the drive pulley to the driven pulley, as a result of which the belt stretches less. The geometrical parameters of the pulling section of the disc-belt flax pulling device were established. Namely, the dimensions of the pulling disk, belt drive and the length of the pulling shaft were determined. A kinematic analysis of the flax pulling process was carried out. Theoretical studies were based on the basic principles of higher mathematics, physics and theoretical mechanics, the theory of mechanisms and machines. Analysis of mathematical models was carried out with the help of applied computer programs, in particular in the computer mathematics environment Maple V. According to the equations, the trajectories of the flax stem movement were constructed for various indicators of the speed regime of the pulling device. It was studied how the indicator of the speed regime of the pulling device and the angle of inclination of the pulling device to the horizontal affect the length of the trajectory of the flax stem movement by the pulling device. The conditions for selecting the indicator of the speed regime of the flax pulling device was considered. It was established that the flax puller speed should not exceed the circular speed of pulling disk rotation. The performed calculations confirmed that the selected geometric and kinematic parameters of the pulling section of the disc-belt flax puller will ensure the complete extraction of flax stalks from the soil.