Method and device for controlling the operation of a gyratory crusher

A method of controlling the operation of a gyratory crusher, which comprises a first crushing shell mounted on a crushing head, and a second crushing shell mounted on a machine frame, a crushing gap being formed between said first and second crushing shells, material to be crushed being fed to said crushing gap, comprising

• measuring a parameter being representative of the stresses to which the crusher is exposed during the crushing of material,
• determining an average value of said parameter,
• determining a deviation value of said parameter,
• calculating a peak value based on said average value and said deviation value,
• comparing said peak value to a reference value, and
• controlling the operation of the crusher in view of said comparison between said peak value and said reference value,
• wherein the calculation of said peak value comprises adding said average value of said parameter multiplied by a first constant, and said deviation value of said parameter multiplied by a second constant.

A method of controlling the operation of a gyratory crusher, which comprises a first crushing shell mounted on a crushing head, and a second crushing shell mounted on a machine frame, a crushing gap being formed between said first and second crushing shells, material to be crushed being fed to said crushing gap, comprising

• measuring a parameter being representative of the stresses to which the crusher is exposed during the crushing of material,
• determining an average value of said parameter,
• determining a deviation value of said parameter,
• calculating a peak value based on said average value and said deviation value,
• comparing said peak value to a reference value, and
• controlling the operation of the crusher in view of said comparison between said peak value and said reference value,
• wherein said peak value is calculated in accordance with the following equation:
• peak value=K1*average value+K2*deviation value.

A method of controlling the operation of a gyratory crusher, which comprises a first crushing shell mounted on a crushing head, and a second crushing shell mounted on a machine frame, a crushing gap being formed between said first and second crushing shells, material to be crushed being fed to said crushing gap, comprising

• measuring a parameter being representative of the stresses to which the crusher is exposed during the crushing of material,
• determining an average value of said parameter,
• determining a deviation value of said parameter,
• calculating a peak value based on said average value and said deviation value,
• comparing said peak value to a reference value, and
• controlling the operation of the crusher in view of said comparison between said peak value and said reference value,
• wherein said deviation value of said parameter is the magnitude of the Fourier component at the frequency of rotation of an eccentric of the crusher, said eccentric being operative for making the crushing head gyrate.