SU1351702A1 - Method of automatic control of crusher operating mode - Google Patents

Abstract

The invention relates to the crushing of materials and is intended to regulate the mode of operation of the crushing plants. It can be used in the crushing plants of ferrous, non-ferrous metallurgy, mining and construction industries. The goal is to improve the quality of regulation. To achieve this goal, the power consumed for crushing is measured, the vibration velocity of the crusher body oscillates and the productivity of the feedstock feed into the crusher is inversely proportional to the vibration velocity of the crusher body and the power consumed for crushing. , measure the level of filling of the crusher and correct the setting of the vibration velocity of the crusher body oscillations, determine the frequency spectrum of the crusher body vibration when crushing the material with a given physico-mechanical properties and a current vibration frequency spectrum of the housing, wherein the reference correction vibration crusher housing oscillation is performed in the current-dependence of the deviation range of vibration frequencies from the housing body vibration spectrum of frequencies when crushing material with predetermined physico-mechanical properties. 1 il. U SO eaten to

Description

The invention relates to the technique of crushing materials, is intended to regulate the mode of operation of crushing plants and can be used in crushing plants, nonferrous metallurgy, mining and construction industries.

The goal of the invention is to improve the quality of regulation.

The essence of the method consists in determining the optimal value of vibration velocity by the frequency spectrum of the vibration of the crusher body, measured at a given level of crusher filling, with a sign of known solutions.

Improving the quality of regulation occurs due to a more accurate determination of the optimal value of vibration velocity by taking into account changes in the physicomechanical properties of the feedstock from the frequency spectrum of vibration of the crusher body at a given level of filling.

The drawing shows a block diagram of a device for implementing the proposed method.

The device comprises a feedstock feeder 1, a crusher 2, a vibration sensor 3 of the crusher body 2, a power sensor 4 consumed by the crusher drive, a level sensor 5, an analyzer 6 of the vibration spectrum of the crusher body 2, a high-frequency filter 7 a vibration crusher vibration velocity detector 8, block 9 tasks. speed and the system 10 controls. drive 11 feeder 1.

Example. For a given size of the discharge gap of the crusher 2 and the load level controlled by the level 5 sensor, the frequency spectrum of the vibration of the crusher body 2 that occurs when crushing a material with known physical and mechanical properties is determined. The vibration frequency spectrum of the crusher body 2 is converted into an electrical signal by the vibration sensor 3 and entered into the memory registers of the spectrum analyzer 6. After that, the crusher 2 is loaded with a feeder 1, the vibration velocity of the crusher body 2 is determined experimentally at varying physicists close to the throughput method of the mechanical properties of the initial crusher. The value of the vibration-raw material loaded into the crusher and the date are entered into the memory register of block 9 of the vibration velocity setting.

There is no way to improve the accuracy of regulation.

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When crushing the material entering the crusher 2 from the vibration sensor 3 at a given load level of the crusher 2, controlled by the level sensor 5, an electrical signal is sent to the spectrum analyzer 6, where the physicomechanical properties of the crushed raw material are determined by comparing the current vibration frequency spectrum with frequency spectra of vibration arising from the crushing of raw materials with known physicomechanical properties. As a result of comparing the vibration frequency spectra, the signal from the output of the analyzer 6 of the spectrum enters unit 9 for Ani vibration. The signal from the output of block 9 of the vibration velocity, equal to the vibration velocity of the crusher body, arising from the crushing of this material and when the capacity of the feeder 1 is close to the throughput of the crusher 2, enters the input of the system 10 of the drive control 11 of the feeder 1. Signal: vibration sensor 3 enters the filter 7, which separates high-frequency oscillations, and from the output of the filter 7 - to the input of the vibration velocity detector 8. From the output of the detector 8, an electric signal is fed to one from the inputs of the system 10 of the drive control 11 of the feeder 1, where it is compared with the signal coming from the vibration velocity setting unit 9, and according to the deviation from the set value of the vibration velocity, the drive control system 11 of the feeder 1 sets the rotational speed of the drive 11 of the feeder 1, at which the performance of the feeder corresponds to the throughput of the crusher.

When the permissible value of g is exceeded, the power consumed by the drive of the crusher 2 to the input of the system 10 controls the drive 11 of the feeder 1 from the sensor. 4, a signal is received to reduce the control command at the output of the control system 10, i.e. to reduce the supply of raw materials to the crusher 2 feeder 1.

The method allows automatic adjustment of the ra0 mode.

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This makes it possible to increase the control accuracy by determining the optimum current value of the vibration velocity of the crusher body. This provides an increase in the efficiency of the crushing process, reducing the specific energy consumption during crushing, and also makes it possible to increase the service life of the crushers, reduce repair costs, and increase the turnaround time.

Claims (1)

Invention Formula A method for automatically adjusting the operating mode of a crusher, including measuring the power consumed for crushing, vibration velocity of the crusher body and changing the loading capacity of the raw material to the crusher in inversely proportional dependence on the vibration velocity J oscillations of the crusher body and the power consumed for crushing, characterized in that, in order to improve the quality of regulation, the crusher's filling level is measured and the vibration vibration velocity setting of the crusher body is adjusted, the frequency spectrum of the crusher body is determined during crushing material with specified physicomechanical properties and the current frequency spectrum of the housing vibration, and correction of the vibration velocity setting of the crusher body depends on the deviation of the current frequency spectrum Vibration of the housing body vibration spectrum of frequencies when crushing material with predetermined physico-mechanical properties. Editor A. Ogar Compiled by V.Alekperov Tehred L. Serdyukova Proofreader N. Korol. Order 5521/9 Circulation 7A1. Subscription VNIIPI USSR State Committee for discovery inventions 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4