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Mine crusher anti-resonance method and system thereof

A crusher and mining technology, applied in the field of mining machinery control, can solve the problems of reducing the service life of the crusher, unable to solve the problems of equipment resonance, large machinery and structure, etc., to avoid resonance phenomenon, improve service life, and enhance prediction ability Effect

Active Publication Date: 2015-04-22
CHINA UNIV OF MINING & TECH
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  • Abstract
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Problems solved by technology

Resonance will cause great deformation and dynamic stress of machinery and structure, and even cause destructive accidents, reducing the service life of the crusher
[0003] The load condition of the crusher changes greatly during operation, resulting in a large deviation between the actual resonance mode of the crusher and the theoretical mode. Most of the existing products are driven by power frequency. When the actual resonance mode deviates from the theoretical mode , the problem of equipment resonance cannot be solved

Method used

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  • Mine crusher anti-resonance method and system thereof
  • Mine crusher anti-resonance method and system thereof
  • Mine crusher anti-resonance method and system thereof

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with accompanying drawing.

[0024] A method for anti-resonance of a mine crusher, comprising the following steps,

[0025] The first step: install the vibration sensor on the crusher body, and install the current transformer on the main circuit of the crusher motor;

[0026] The vibration sensor is a displacement sensor; the crusher motor provides external excitation frequency.

[0027] Step 2: Obtain the natural frequency of the crusher under different loads and the corresponding amplitude of the crusher, and establish a standard modal curve for input to the PLC controller; the steps for establishing a standard modal curve include:

[0028] The main transmission parts of the crusher are properly meshed, and the two ends of the transmission parts are fixedly supported, and the finite element model of each transmission part is constructed.

[0029] (2) The loading range of load L is 0L N -1.25L N ,...

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Abstract

The invention discloses a mine crusher anti-resonance method and a system thereof. The method comprises the following steps: 1, arranging a vibration sensor on the body of the crusher, and arranging a current transformer on the main circuit of the motor of the crusher; 2, acquiring the natural frequency of the crusher under different loads and its corresponding crusher amplitude, establishing a standard modal curve, and inputting the curve to a PLC controller; and 3, obtaining the current amplitude of the crusher through the vibration sensor arranged on the body of the crusher, comparing the natural frequency with the corresponding amplitude under current load, and dynamically adjusting the excitation frequency according to the standard modal curve by the PLC controller when the current amplitude approaches the amplitude corresponding to the natural frequency. The extraneous excitation frequency is automatically adjusted according to the current load condition of the crusher to avoid the natural frequency of the current crusher in order to avoid the resonance phenomenon of the crusher. The method is simple and reliable, and can prolong the service life of the crusher.

Description

technical field [0001] The invention relates to an anti-resonance method for a mine crusher, belonging to the technical field of mine machinery control. Background technique [0002] Mining crushers are mainly used for crushing various types of stone, and can be widely used in many departments such as mining, smelting, building materials, roads, railways, water conservancy and chemical industries. The natural frequency of the crusher is determined by its own structure and the crushing load. When the load of the crusher is running from no load to full load, its natural frequency will gradually decrease. When the external excitation frequency is close to a certain natural frequency of the crusher structure, A sharp increase in amplitude occurs until resonance is reached. Resonance will cause great deformation and dynamic stress of machinery and structure, and even cause destructive accidents and reduce the service life of the crusher. [0003] The load condition of the crush...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B02C25/00
Inventor 王忠宾许静谭超周晓谋闫海峰姚新港
Owner CHINA UNIV OF MINING & TECH
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