Investigation of the power-consuming mower drive operation

На підставі аналізу конструктивних особливостей механізмів, що балансують енергію приводів косарок сегментно-пальцевого типу, наведено раціональну конструкцію такого пристрою. Також виконано порівняльний аналіз енергоефективності його роботи. За розробленою програмою й методикою експериментальних досліджень проведено випробування в польових умовах косарки з енергозберігаючим приводним механізмом, встановлено його раціональні кінематичні та конструктивні параметри.The problems of raising operating efficiency of segment–pin mower are analysed. Difficulties, which occur during the operation of such mower drives, have been analysed. The ways to get rid of these problems have been analysed. Additional device of the mower drive has been proposed to be introduced. The parameters of this device are adjusted and it is made of elastic elements. Its structure is presented here. The main device elements are two coiled springs. They are fitted into the bushes and limitted by two washers. They are external thread bushes and screwed into the device body. Between two elastic elements piston rod is located. The other end of the rod is attached to the mower knife. The bushes can move in axial direction while rotating in the body of the mower device. It provides the gap between the piston and the elastic elements. Mathematic model of such drive has been developed in the previous theoretical papers. The graphs of power consumed by the drive are presented here. The comperison of power-efficiency for the basic and improved drives has been carried out. It was necessary to test the obtained effect experimentally. The plan and method of experimental tests have been developed. The aim of experimental investigation was to find the amount of power, consumed by the mower drive. To provide this process special strain measurement device has been developed. The torquemeter is the main in it. The signal from the strain measurement device is processed by the numerical system. Experimental investigations were performed in the field conditions. Weed mowing was in different areas. The experimental data were recorded for both basic and improved drive construction. Statistic processing of the obtained data has been carried out. Coefficients have been found and regression equation for this process has been written. Basing on the obtained equation the respond surfaces have been built, according to which the effective parameters of the drive have been chosen. The criterion for choosing parameters is the drive minimum power consumption under given mower efficiency