Track harvester hydraulic control system and control method

Abstract

The invention discloses a track harvester hydraulic control system and a control method, and solves the problem of unreliable steering of a paddy machine due to incapability of realizing a steering priority function by a traditional multi-way valve. The track harvester hydraulic control system comprises a main oil inlet, an oil return port, a control valve and a work valve; the control valve comprises a control reversing valve and a priority valve; the control reversing valve is provided with a first position, a second position and a third position; and when the control reversing valve is positioned in the first position and the third position, pressure oil in an oil inlet of the priority valve enters a right side spring cavity of the priority valve through a first throttling hole to cooperate with pressure oil in the oil inlet of the priority valve selected by a left side control cavity of the priority valve for controlling the position of a valve rod of the priority valve. The control method comprises the following steps: when the steering oil cylinder and the work valve are acted, the reversing valve and the priority valve are controlled to realize steering priority actions. Thetrack harvester hydraulic control system has the advantages of simple structure, convenience to assemble, reliable action, long service life and the like.

Description

technical field [0001] The invention relates to a crawler harvester, in particular to a hydraulic control system and a control method for the crawler harvester. Background technique [0002] The automatic harvester is a machine that directly harvests the grains of corn, rice, and wheat from the pole. The rice harvester in the domestic crawler harvester mainly has four actions: header, reel, steering, and grain unloading bucket. In actual use conditions, the steering priority function needs to be implemented. However, the manual and electronically controlled multi-way valves in current applications cannot achieve this function. figure 1 For the existing manual rice machine principle, figure 2 It is the principle of the existing electronically controlled rice machine. These two working principles have the following problems: 1. When the steering and other actions work at the same time, the steering priority cannot be realized; 2. The electronically controlled steering also...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the existing multi-way valve in the background technology cannot realize the steering priority function, making the steering of the rice machine unreliable, the present invention provides a hydraulic control system and control method for a crawler harvester

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