US 2009/0256013 A1Published application

Crushing apparatus and method of putting it into operation

AssigneeSandvik Intellectual Property AB

InventorsBengt-Arne Eriksson, Kristian Burhoff

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Abstract

A crushing apparatus has a gyratory crusher, which has an inner shell, an outer shell and an eccentric. A lubricating system is arranged to conduct a lubricant to at least one movable part, such as the eccentric of the gyratory crusher. The lubricating system has an oil sump, which collects the lubricant after it has been used for lubrication of the movable part, and a valve mechanism, which is arranged to apportion a lubricant flow in the crusher. The valve mechanism is arranged to assume a first position, in which a first sub-volume of the lubricant flow is conducted directly to the movable part for lubrication of the same and a second sub-volume is conducted directly to the oil sump, the second sub-volume constituting from about 30 to about 100% of the lubricant flow, and a second position, in which at least about 90% of the lubricant flow is conducted to the movable part for lubrication of the same.

Claims10

Dependent claims

A crushing apparatus, comprising:

a gyratory crusher having a crushing head, which supports a first crushing surface, a second crushing surface, which surrounds the first crushing surface, and an eccentric, which is arranged to cause the crushing head to execute a gyratory movement;
a lubricating system, which is arranged to supply a lubricant for lubrication of at least one movable part of the gyratory crusher, wherein the lubricating system comprises an oil sump, which is arranged to collect the lubricant after it has been used for lubrication of the at least one movable part, and a valve mechanism, which is arranged to apportion a lubricant flow in the crusher, the valve mechanism being arranged to assume a first position, in which a first sub-volume of the lubricant flow is conducted to the at least one movable part for lubrication of the at least one movable part and a second sub-volume of the lubricant flow is conducted directly to the oil sump, the second sub-volume constituting from about 30 to about 100% of the lubricant flow and the first sub-volume amounting to the remaining part, if any, of the lubricant flow and a second position, in which at least about 90% of the lubricant flow is conducted to the at least one movable part for lubrication of the same.

A method of putting into operation a crushing apparatus, which comprises a gyratory crusher having a crushing head, which supports a first crushing surface, a second crushing surface, which surrounds the first crushing surface, and an eccentric, which is arranged to cause the crushing head to execute a gyratory movement, the crushing apparatus further comprising a lubricating system, which is arranged to supply a lubricant for lubrication of at least one movable part of the gyratory crusher, wherein

determining a starting temperature of the gyratory crusher and comparing the starting temperature with a predetermined value,
supplying a lubricant flow to a valve mechanism from a lubricant reservoir, and
dividing the supplied lubricant flow, if the starting temperature is below the predetermined value, into a first sub-volume and a second sub-volume by the valve mechanism, the first sub-volume being conducted to said at least one movable part of the crusher for lubrication of the same and then conducted back to the lubricant reservoir, while said second sub-volume is bypassed around said at least one movable part of the crusher and conducted back to the lubricant reservoir, said second sub-volume constituting from about 30 to about 100% of the lubricant flow and said first sub-volume amounting to the remaining part, if any, of the lubricant flow.

Dependencies are inferred from the claim text.