Patent ID: 7815133

Claim:
A method for controlling process parameters of a cone crusher comprises: providing the crusher with sensors; estimating a size of a discharge gap between external and internal cones; adjusting the size of the discharge gap using hydraulic cylinders modifying a position of the external cone relative to the internal cone by means of a adjustment ring; the method being characterized by: using sensors measuring a distance as said sensors; controlling the operation of all sensors mounted on the crusher by a program algorithm of a central computer; rigidly securing a measurement disc R to an unbalanced vibrator in such a manner that a plane of the disc R is always perpendicular to a rotation axis of the unbalanced vibrator, mounting at least two distance measurement sensors on a body of the crusher in such a manner that the disc R in any time is within a working effective zone of the distance sensors; measuring a distance from each of the measurement sensors to the disc R and calculating a three-dimensional position of the plane of the disc R, wherein an angle & of deviation of the plane of the disc R from horizontal determines an angle &′ of deviation of the internal cone from vertical according to which an amplitude of circular oscillations of the internal cone is determined; determining the size of the discharge gap from the amplitude of circular oscillations; comparing the obtained size of the discharge gap to a predetermined parameter of the gap in the central computer; if correction of parameters is necessary as a result of comparisons, outputting a control command to the hydraulic cylinders by the central computer to modify a positions of the adjustment ring; as the discharge gap achieves the predetermined parameter, outputting a control command to the hydraulic cylinders by the central computer to stop modification of the position of the adjustment ring; monitoring the modification of the position of the adjustment ring using at least one distance monitoring sensor which is mounted at a flange of a top part of the body within an opening between the flange of the body and a flange of the adjustment ring of the external cone; measuring a distance S between the flange of the body and the flange of the adjustment ring and supplying information to the central computer and comparing it to previous measurements; simultaneously, by the central computer, monitoring a wear of working surfaces of the cones in such a manner that a minimum wear corresponds to a minimum value of the S while a maximum wear corresponds to a maximum value of the S, and outputting a command to stop operation and replace the cones when the S achieves a critical value; simultaneously, by the central computer, monitoring a spontaneous turn of the adjustment ring that shows an unauthorized variation of the distance S because of relaxing a thread tension, wherein all said measurements take place continuously, cyclically, in the operation mode, in the idle mode, and in the quiescent state.