Importance

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Abstract

A gyratory crusher includes a frame structure; an eccentric member rotatably mounted to the frame structure about a first axis; a main shaft rotatably mounted to the eccentric member about a second axis angularly offset from the first axis; a crusher head mounted to the main shaft and supported by a plurality of hydrostatic bearings, mounted on the frame structure in abutting engagement with the crusher head; a first drive mechanism for rotating the eccentric member about the first axis; and a stroke adjusting mechanism having an outer race continuously and dynamically rotatable about a third axis, angularly offset from both the first and second axes, for adjusting the angular offset of the second axis relative to the first axis. A hydraulic drive mechanism, including a hydraulic motor and a rotary hydraulic connector, distribution lines and ports, for distributing pressurized hydraulic fluid to the hydraulic motor, is provided for rotating the outer race relative to the eccentric member about the third axis. A lock check valve interposed in the distribution system controls the flow of hydraulic fluid to and from the hydraulic motor. The drive mechanism includes a worm gear and a worm gear receiver matingly engaged therewith. A gap adjusting mechanism and a gyrational speed adjusting arrangement are provided for continuously and dynamically adjusting the 'closed side setting' and gyrational speed of the crusher, respectively. A method for similarly adjusting the stroke is provided.

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First Claim