Researching operational reliability of key combine systems in Stavropol Territory

Abstract

The paper analyzes the performance parameters of the main systems of combine harvesters by the example of ordinary farms in the Stavropol Territory. For a detailed determination of the indicators of using combine harvesters, the method of timing the work of this type of agricultural machinery and accounting and statistical documentation of farms were used. The data of continuous and selective timing together with the data from primary documentation of farms allowed obtaining the information on the indicators of use and reliability of combine harvesters when harvesting grain crops in the ordinary operation. The timing of the work of the combines was carried out during the harvesting season of 2015-2019 in the territory of the Stavropol Territory, which included two types of harvesting - continuous and selective. 86 combine harvesters were put under surveillance. A significant proportion of the occurring failures was accounted for the harvesting part, mechanical transmissions, various hydraulic systems, threshing tools, electrical and electronic controls. Based on experimental studies, the distribution of occurring failures of combine harvesters in the course of their work is mounted. Recovery times for such systems can be long.

Model and Method of Fault Signal Diagnosis for Blockage and Slippage of Rice Threshing Drum

“…However, due to the different growth conditions of the grain, the threshing drum may generate torsional vibration under the action of impact load. Therefore, the torsion equation of this system can be expressed as Equation (15).…”

“…In Equation (15), the torque at the left and right ends can be approximately equal to I, the torsional stiffness is K T , and the torsional damping is D r . The solution to this equation is shown in Equation (16).…”

“…Shin et al divided the common failures of combine harvesters into header failures, threshing system failures and re-trippers failures, then proposed relevant measures to prevent and reduce failures [14]. Pavlyuk et al analyzed the main system performance parameters of the combine harvester, pointed out that the failure parts of the combine harvester are mainly concentrated in the harvesting part and the threshing part [15]. Wang et al collected the vibration signal of the shaft end of the threshing drum by a wireless vibration sensor, and the Hilbert-Huang transform analysis method was used to analyze and process the signal to obtain the blockage process of the threshing drum.…”