Hydraulic control system and silage harvester

Abstract

The invention discloses a hydraulic control system and a silage harvester, and belongs to the technical field of agricultural machinery. The hydraulic control system comprises a hydraulic motor, a variable pump module and a pilot oil way assembly, the hydraulic motor is used for driving an executing mechanism to operate, the variable pump module comprises a variable pump, a variable cylinder, a first electromagnetic valve, a limiting cylinder and a second electromagnetic valve, the first electromagnetic valve is connected with the variable cylinder and can adjust the movement speed and the movement direction of a piston, so the swash plate angle of the variable pump is adjusted, the forward rotation and reverse rotation of the executing mechanism are adjusted, when the executing mechanismrotates reversely, the executing mechanism can spit out hard objects, and damage to the machine and livestock is avoided; and the second electromagnetic valve is connected with the limiting cylinder,the second electromagnetic valve enables the limiting cylinder to limit movement of a piston rod so that the displacement of the variable pump can only be adjusted between the zero displacement and the maximum positive displacement, stalling of the executing mechanism can be achieved, the limiting cylinder mechanically limits the piston rod of the variable cylinder, and the cost is low.

Description

technical field [0001] The invention relates to the technical field of agricultural machinery, in particular to a hydraulic control system and a silage harvester. Background technique [0002] At present, domestic silage harvesters basically do not have metal detection and stone detection functions. During actual harvesting operations, metals and stones can easily enter the machine, causing damage to the working parts of the machine. At the same time, feed mixed with metals or stones may also cause damage to livestock. . [0003] The feeding mechanism of the traditional storage harvester is driven by hydrostatic pressure, and a solenoid valve is installed on the motor to realize the function of quick stop. Since the feeding mechanism needs to stop rotating in the shortest possible time, it is used to drive the feeding mechanism The hydraulic system has high requirements for responsiveness, and then has high requirements for the precision of the piston on the motor, and the ...

AI Technical Summary

Problems solved by technology

[0002] At present, domestic silage harvesters basically do not have metal detection and stone detection functions. damage, while feed mixed with metal or stones can also be harmful to livestock

[0003]The feeding mechanism of the traditional forage harvester is driven by hydrostatic pressure, and a solenoid valve is installed on the motor to realize the function of quick stop. It may stop rotating in a short period of time, so the hydraulic system used to drive the feeding mechanism has high requirements for responsiveness, which in turn requires high precision for the piston on the motor, and the cost is relatively high

In addition, although the traditional hydraulic system can realize the function of stopping the feeding mechanism, the hard objects such as metals and stones that have been mixed will still stay inside the machine, causing damage to the machine and harm to the livestock

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