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

A technology of hydraulic support and hydraulic system, which is used in mine roof support, earth-moving drilling, mining equipment, etc., can solve the problems of unquantifiable working face hydraulic support system with machine speed and hydraulic stability.

Active Publication Date: 2019-11-08
TAIYUAN UNIV OF TECH
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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 supp

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

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Embodiment Construction

[0033] The present invention will be further described in detail with reference to the accompanying drawings and embodiments.

[0034] The follow-up speed of the hydraulic support system and the pressure stability of the hydraulic system are determined by the joint coupling of the hydraulic support follow-up control strategy and the hydraulic supply system control strategy. In view of this, under the premise of considering the control strategy of the hydraulic support with the machine, the present invention adopts the liquid supply system of the multi-pump frequency conversion emulsion pump station as the liquid supply power adjustment method, and based on the control method between the liquid supply and the hydraulic support action as the interactive Based on the control logic of the cooperative action of the hydraulic support system and the superimposed relationship, a method for predicting the follow-up speed and hydraulic stability of the hydraulic support system in the wor...

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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...

Claims

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Application Information

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IPC IPC(8): E21D23/16E21D23/26
CPCE21D23/16E21D23/26
Inventor 付翔王然风
Owner TAIYUAN UNIV OF TECH
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