Control system and method for driving threshing cylinder of combine harvester

Abstract

The invention relates to a control system and method for driving a threshing cylinder of a combine harvester, and belongs to the technical field of agricultural harvest machinery. The control system comprises a hydraulic part and an electric control part, wherein the hydraulic part comprises a hydraulic motor for driving the threshing cylinder, and a closed type speed regulation main working circuit composed of an electric-hydraulic proportional variable pump, the hydraulic motor is provided with parallel oil change control circuits, and the proportional variable pump is provided with a variable control circuit composed of a tandem proportional directional valve and a double-acting hydraulic variable cylinder; and the electric control part comprises a revolution speed transducer arranged on the threshing cylinder and a pressure transducer arranged on the main working circuit, signal output ends of the revolution speed transducer and the pressure transducer are connected with corresponding signal input ends of a PLC (programmable logic controller) respectively, and a control signal output end of the PLC is connected with a control signal input end of the variable control circuit after passing through an amplifying device. The invention solves the problem that parameters are difficult to detect, also avoids hysteresis quality, and can ensure that the threshing cylinder is always in a stable ideal working state.

Description

technical field [0001] The invention relates to a combine harvester, in particular to a drive control system for a combine harvester threshing cylinder and a corresponding method, belonging to the technical field of agricultural harvesting machinery. Background technique [0002] The threshing drum is a key component of the combine harvester, and the drum speed is an important parameter directly related to the performance of the machine tool. The optimal working parameters of the threshing drum are different for different crops. The increase of the threshing speed will strengthen the effect of the threshing element on the grain, and the corresponding cleaning rate will also increase; but if the speed is too high, the degree of crushing of the grain and straw will increase, and the power consumption will also increase. If the threshing speed is too low, the threshing will be unclean. Therefore, through the comprehensive analysis of the threshing process to determine the most...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is: aiming at the deficiencies existing in the above-mentioned prior art, propose a kind of combine harvester threshing drum driving control system that directly and automatically regulates the threshing drum speed, and provide corresponding methods at the same time, thereby completely solving the traditional control method Difficult parameter detection and hysteresis problems, always ensure that the threshing drum is in a stable and ideal working state

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