An electro-hydraulic control system and method for a differential crawler combine harvester test vehicle
An electro-hydraulic control system and combine harvester technology, which is applied in the direction of harvesters, cutters, agricultural machinery and implements, etc., can solve the problems of complicated control and operation of the steering mechanism, so as to avoid oil circuit breakage, realize precise control, and reduce equipment costs low effect
Active Publication Date: 2017-04-05
JIANGSU UNIV
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Problems solved by technology
[0004] The purpose of the present invention is to solve the above-mentioned problem that the control operation of the steering mechanism with in-situ steering function is complicated, and a set of electro-hydraulic control system is designed to control the steering mechanism, and a control method is obtained based on the system
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[0030] according to Figure 1 to Figure 4 , the implementation of the electro-hydraulic control system is described in detail as follows:
[0031] An electro-hydraulic control system of a differential crawler combine harvester performance test vehicle, characterized in that it includes a steering mode switching switch 2, a steering pilot travel switch module 3, a steering direct-acting solenoid valve module 4, a gear pump 5, and a fuel tank 6 , a back pressure valve 7; the steering mode switching switch 2, the steering pilot travel switch module 3, the steering direct acting solenoid valve module 4, the gear pump 5 and the fuel tank 6 are sequentially connected in series; the gear pump 5 and the back pressure valve 7 are connected in parallel, The gear pump 5 and the oil tank 6 are connected in series;
[0032] Steering mode switching switch 2 has three gears of "1st gear", "2nd gear" and "3rd gear". The steering differential control switch SB2 is used for neutral gear and "...
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The invention provides an electro-hydraulic control system for a differential type tracked combine harvester test vehicle and a control method thereof. The system comprises a steering mode shift switch, a steering guide travel switch module, a steering direct-acting solenoid valve module, a gear pump, a fuel tank and a backpressure valve. The steering mode shift switch, the steering guide travel switch module, the steering direct-acting solenoid valve module, the gear pump and the fuel tank are sequentially connected in series. The gear pump is in parallel connection with the backpressure valve, and the gear pump is in series connection with the fuel tank. The control method based on the electro-hydraulic control system is used for single-side brake steering, free radius steering and differential pivot steering. The control system is simple is structure, the control method is convenient to operate, and the control system and method can be well applied to steering mechanism control of the differential type tracked combine harvester performance test vehicle.
Description
technical field [0001] The invention relates to the field of steering control systems, in particular to an electro-hydraulic control system of a differential crawler combine harvester performance test vehicle and a control method based on the system. Background technique [0002] As one of the main food crops in my country, rice is mostly harvested by crawler combine harvesters; with the continuous increase in the yield per mu of rice and the increase in user requirements for harvesting efficiency, combine harvesters with large feed volumes have gradually become market mainstream; [0003] At present, the mass of the crawler combine harvester with large feeding volume is getting bigger and bigger, the track is wider, and the grounding length is also longer. Therefore, when working in the rice field with heavy soil, the traditional unilateral braking steering method is used for steering. , The accumulation of soil caused by braking the side track will increase the steering re...
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IPC IPC(8): A01D41/127
Inventor 李耀明陈劲松徐立章唐忠
Owner JIANGSU UNIV