Results of experimental studies of a tractor equipped with an elastic-damping mechanism when aggregated with a seeder

Abstract

One of the significant factors influencing the operation of the tractor is the unsteady load that occurs when starting off, during the initial period of acceleration and deceleration. The elastic-damping mechanisms are used to reduce the negative consequences of such loads. Scientists still develop and study their application. In this article, the analysis of the cross correlation function and the analysis of the mutual spectral density of two processes were carried out. The analyzed process-es were the engine crankshaft speed and the drive wheel speed. This analysis shows the change in the speed of the passing load frequencies along the shaft line of the traction class 1.4 wheeled trac-tor power transmission, where an elastic-damping mechanism is installed. The studies were carried out for the operating conditions of a tractor with a seeder. The purpose of the study was to deter-mine the effect of the elastic-damping mechanism installed in the power transmission of a tractor on its operation with a trailed seeder. In the general case, the object of research is the functioning of a tractor of traction class 1.4 process, which is located in a unit with a seeder. Analysis of the mutual correlation function of the two processes showed a change in the speed of the passing load frequen-cies along the shaft line. The ratio of the propagation time of the disturbance signal in the experi-mental tractor in relation to the production version along the shaft line when aggregating the tractor with the seeder decreases by 40.1%. The analysis of the mutual spectral density shows a shift in the frequency of disturbing influences in relation to the serial version and a decrease in their value when the tractor is aggregated with a seeder by 33.3%. The value of the mutual spectral density is lower in the experimental version of the tractor, which may mean that the elastic-damping mechanism, as an element of the power transmission, absorbs part of the load fluctuations and reduces their propagation speed along the shaft line.