Working face hydraulic bracket system machine following speed and hydraulic stability predicting method

Abstract

The invention provides a working face hydraulic bracket system machine following speed and hydraulic stability predicting method, and belongs to the field of hydraulic systems. The problem that in theprior art, only the relation between the speeds of different types of actions of a hydraulic bracket, the supply liquid flow and the hydraulic system pressure can be subjected to qualitative description, and a hydraulic bracket action machine following speed and hydraulic stability quantitative predicting method is not provided is solved. The working face hydraulic bracket system machine following speed and hydraulic stability predicting method comprises the steps that supply liquid of the hydraulic bracket is controlled to be a multi-pump variable-frequency emulsified liquid pump station supply liquid system, a control method for action of the supply liquid and action of the hydraulic bracket is preset to be the overlapping-relationship supply liquid and hydraulic bracket concerted action control logic, and on that basis, working state data of the supply liquid system and the hydraulic bracket system are obtained; according to the working state data of the supply liquid system and the hydraulic bracket system, the machine following speed of the hydraulic bracket system is calculated; the pressure change rate of the hydraulic system is calculated according to the working state data of the supply liquid system and the hydraulic bracket system; and the hydraulic stability is evaluated according to the pressure change rate of the hydraulic system.

Description

technical field [0001] The invention relates to the technical field of coal mine working face hydraulic systems, in particular to a method for predicting the follow-up speed and hydraulic stability of a working face hydraulic support system. Background technique [0002] The hydraulic support is the supporting equipment of the coal mine fully mechanized mining face. Its main function is to support the roof of the stope, maintain a safe working space, and push the mining and transportation equipment of the working face. There are usually hundreds of hydraulic support groups in a working face to form a hydraulic support. system. In order to ensure the normal production and advancement of the working face, the hydraulic support system needs to adapt to the speed of the shearer and the operation of the machine, accurately and stably complete a series of cyclic actions such as lowering the column, moving the frame, raising the column, and pushing, so as to follow up and support t...

AI Technical Summary

Problems solved by technology

However, the research of the above-mentioned technicians only qualitatively obtained the relationship between the action speed of different types of supports, the system pressure, and the flow rate of the liquid supply, but failed to propose a quantitative calculation method for the action speed of the supports, but these methods cannot quantify the work. The speed and hydraulic stability of the surface hydraulic support system

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