| 摘要 |
FIELD: technological processes. ^ SUBSTANCE: invention is related to screening devices, more precisely - to equipment that is used for screening machine control. According to suggested method of screening machine control, amount of material on the screening surface is determined automatically, and rate of feed facilities supply is preset on the basis of measurements of automatic control system so that supply rate is changed for differing supply rate by one of the following methods: upper and lower values that were set in advance are used (valmax, valmin) as measurements (valm) of variable, which is dependent on amount of material on the sieve surface, and when the value of measurements (valm) reaches one of previously set values, the rate of feed facilities is reduced, and when value of measurements reaches another previously set value, the rate of feed facilities increases, or when the rate of measured value change (valm) exceeds the previously set value ((Deltavalm/Deltat)max), the rate of feed facilities changes. Screening machine, which is used for method implementation, contains sensor (S) for measurement of variable, which is dependent on amount of material on screen surface, controller (C), for which the mentioned sensor (S) is connected via the line of data transmission for obtainment of measurement values that are connected with mentioned variable from sensor, handle of drive (A) that is connected with feed facilities and is installed for changing rate of feed facilities supply. Controller (C) is connected with the mentioned handle of drive (A) via data transmission line and is installed to send commands to mentioned handle in response to measured value (valm), which was received from sensor (S) for changing rate of feed facilities supply to different values of supply rate. ^ EFFECT: increase of screen sizing efficiency and quality of screened material with optimisation of screen sizing parameters. ^ 14 cl, 6 dwg |
