| 摘要 |
Method for controlling a gyratory crusher comprising a crushing head provided with a first crushing mantle, (4) and a second crushing mantle (5) which, in combination with said first crushing mantle (4), defines a crushing gap (6). The width of the crushing gap can be adjusted by changing the relative axial positions of the first and second crushing mantles by means of a hydraulic adjusting device. To protect the crusher against damage, the number of pressure surges occuring in the hydraulic fluid in the adjusting device during a predetermined period of time and exceeding a predetermined pressure level, is counted. If the counted number of pressure surges exceeds a predetermined sum, the relative positions of the crushing mantles are changed such that the width of the crushing gap (6) is increased. In addition, the number of times the width of the crushing gap is increased during a predetermined period of time is counted, and charging of the crusher is stopped and furthermore an alarm is provided if the counted number of times the width of the crushing gap (6) increases exceeds a predetermined sum. |
