Hydraulic system of high-ground-clearance spraying machine

Abstract

The invention provides a hydraulic system of a high-ground-clearance spraying machine. A first hydraulic pump is connected with a priority valve; the priority valve is connected with a front wheel steering hydraulic cylinder through a hydraulic steering gear and is connected with an energy accumulator and a first reversing valve in parallel through a fixed throttling opening and a one-way valve insequence; an oil outlet of a second hydraulic pump is connected with a diverter valve and a fixed differential reducing valve through a one-way stable diverter valve, the diverter valve is connectedwith a fertilizer throwing hydraulic motor through a second reversing valve and a speed regulating valve, and a third reversing valve is connected with a spraying hydraulic motor through a fixed pressure reducing valve; the fixed differential reducing valve is connected with a rear wheel steering hydraulic cylinder through a fourth reversing valve and a hydraulic control one-way valve group; and ashuttle valve is connected with two working oil ports of the fourth reversing valve, and oil liquid of the working oil port with higher pressure is fed back to a spring cavity of the fixed differential reducing valve. The hydraulic system adopts a hydraulic transmission mode and is flexible in steering mode, and easy to turn and turn round, the damage degree of a seedling bed is small in the steering process, and meanwhile, the operation process is convenient.

Description

technical field [0001] The invention relates to the technical field of agricultural planting machinery, in particular to a hydraulic system of a high ground clearance sprayer. Background technique [0002] The high ground clearance sprayer is a new type of agricultural plant protection machinery. With the characteristics of high ground clearance, wide working width and high efficiency, it overcomes the problems of traditional traction sprayers, such as easy crushing of crops, small ground clearance and low operating efficiency. However, most of the existing high-ground-clearance sprayers are driven in a purely mechanical manner. The steering mechanism of this sprayer is usually a two-wheel steering or a rod-driven four-wheel follow-up steering. It is inflexible, it is difficult to turn and turn around, and it is more destructive to the seedling bed. Therefore, the steering mechanism of the existing sprayer has caused certain obstacles to the improvement of the automation con...

AI Technical Summary

Problems solved by technology

[0002] The high ground clearance sprayer is a new type of agricultural plant protection machinery. With the characteristics of high ground clearance, wide working width and high efficiency, it overcomes the problems of traditional traction sprayers, such as easy crushing of crops, small ground clearance and low operating efficiency.

However, most of the existing high-ground-clearance sprayers are driven in a purely mechanical manner. The steering mechanism of this sprayer is usually a two-wheel steering or a rod-driven four-wheel follow-up steering. Inflexible, difficult to turn and turn around, and more destructive to the seedling bed. Therefore, the steering mechanism of the existing sprayer has caused certain obstacles to the improvement of the automation control level and the flexibility of the whole machine

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