SU609554A1 - Method of automatic control of spiral classifier capacity by sand grades - Google Patents

Description

active signaling signal values (e.g., PO22, 2UCH converter, 2 Vbborgfnbor plants). The device also includes a preamplifier 11, demodus} chorus 12, designed to isolate the amplitude of the envelope of the instantaneous values of the amplified active power signal (its dynamo component) and center this envelope of the envelope relative to the federal power using a transformer output; a fipyr block 13, which separates the amplitude of the dynamic component at a frequency characteristic of a given speed, rotating in the shaft 7, an aperiadic amplifier 14 for acquiring the extracted amplitude; Detection 15, averaging (Ltr 16 and register device 17. The device operates in a similar manner. The piping enters the middle part of the trough 1 j of the classifier, where the mafierial part of the trough is formed, the pulp is removed into the pulp, each has a smaller quantity. the lower parts of the classifier, and the rune are deposited at the bottom of the trough 1 and with ndMOUtbio helix 6, the shaft with the shaft 7 is transported, into the chute 2. Spray 6 on the Kokiie of the screw ends abruptly; and the material is dumped into the sand yellow 2 digits. Porshshmv). The size of one portion consists of the KontraecTfia material enclosed between the coils of the auger 6,:. and a period between the individual portions of the rotation of the screw shaft 7 of the screw. Because of; - due to the unloading of material on the shaft 7 of the auger, there are oscillations. the moment that is perceived by the driven electric motor and, accordingly, change the amount of power consumed by the 8 specimen electrode 5 from the network. With the aid of transponders 8 and 9 and transducer 10, a signal {fopordional by the value of active power is extracted. This signal is increased by the preamplifier 11. In it, the demodulator 12 extracts the dynamic component of the signal, which is the envelope of the Nfrnoe values of the active power signal, centered relative to the average power, and its amplitude is the amplitude of the oscillation on the shaft 7. of the frequency spectrum of the selected dynamic component in the filter bank 13, the amplitude of the dynamic component of the signal at the frequency that is characteristic of a given rotational speed in the la 7. The obtained amplitude of the signal is amplified by an aperiodic amplifier and detects detector 15. Then, in block 16, the amplitude yqDED and ect is fed to the input of 1 11 rider 17. For example, the device for automatically controlling the performance of the spiral classifier for sand including current transformers and voltages connected to a capacitance converter , and a recording device, characterized in that, with a chain of increased accuracy, it contains an interconnected preliminary wiring, a demodulator, a dynamic component fi1p block, aperiodic amplifier, detector, ... averaging filter, the preamplifier at the input is connected to the output of the power converter, and the output of the averaging filter is connected to a recording device. Information sources taken into account during examination: 1. US Patent No. 38608О4, Cl, 235-151-1, 1972. 2. Han, A. A., et al. Automation of cumulative factories. M ,, Nedra, 1974, e, 33-34.

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