Digital control water hydraulic system applied to coal mine equipment

Abstract

The invention provides a digital control water hydraulic system applied to coal mine equipment. The digital control water hydraulic system applied to the coal mine equipment comprises a first power assembly, a first control assembly, a first execution part, a first energy accumulator and a water tank; the first power assembly comprises a first water pump, a one-way valve and a first control valve set which are sequentially connected; the first control assembly comprises two second control valve groups; the one-way valve is connected to P ports of the two second control valve groups through the first energy accumulator; ports A and B of the two second control valve groups are respectively connected to two cavities of the first execution part; the second control valve groups are used for controlling the flow and pressure entering the first execution part; and the T port of the first control valve group and the T ports of the second control valve groups return water to the water tank. According to the invention, a plurality of digital switch valves are connected in parallel to form a water hydraulic channel, so that the flow range of the channel can be expanded; and on-off combined control of plurality groups of switch valves is utilized to discretize continuously changing damping, so that stable, continuous and large-range control of pressure and flow of a channel inlet can be realized.

Description

technical field [0001] The invention relates to the technical field of hydraulic control systems, in particular to a digitally controlled water hydraulic system applied to coal mine equipment. Background technique [0002] Bolter mining machine is a kind of underground engineering equipment used in coal mine roadway excavation. Due to the particularity of the construction site, there are strict requirements and higher expectations for the coal safety of the equipment. [0003] Hydraulic systems are essential to the design of heavy engineering equipment. It is inevitable that the equipment will leak hydraulic oil during the construction process. Hydraulic oil belongs to mineral oil. Leakage not only causes environmental pollution, but also increases unnecessary risks to the coal mine construction environment and the safety of equipment itself. If pure water can be used instead of hydraulic oil to realize power transmission, it will be more environmentally friendly, reduce ...

AI Technical Summary

Problems solved by technology

According to the available information, due to the lack of high-performance water hydraulic components, the design of the water hydraulic system cannot be as flexible as the hydraulic system

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