Kleemann Gmbh

Rainer Teichert

Jochen Meier

Gerd Meyer

Till Krauss

A high-pressure pump for the overload protection of a jaw crusher, with an actuator unit which adjustably receives an actuation element in a housing, wherein the actuation element has at least one piston, wherein at least one actuator, tensioning cylinder and a pressure accumulator are provided, wherein the actuator unit is in fluid-conveying connection with the actuator such that in one pump stroke of the actuator unit a transfer fluid is pumped into a second chamber of the actuator and of the tensioning cylinder and the quantity of transfer medium displaced from the actuator, and the tensioning cylinder during the pump stroke is temporarily stored in a pressure accumulator.

High-pressure pump

The invention relates to a crusher, in particular a rotary impact crusher, cone crusher or jaw crusher, having a crusher unit (), which has a movable first crusher body (), in particular a rotor or a crusher jaw, wherein a second crusher body (), in particular an impact rocker or a crusher jaw, is assigned to the first crusher body (), wherein a crushing gap () is formed between the crusher bodies (), wherein an overload triggering device () is coupled to the first crusher body or to the second crusher body, which overload triggering device has a hydraulic cylinder () and which overload triggering device is designed to permit a motion of the coupled crusher body () increasing the width of the crushing gap (), wherein the hydraulic cylinder () has a pressure chamber (), which is delimited by means of a piston (), and wherein the overload triggering device () has a pressure valve () which, in its open position, establishes a fluid-conveying connection between the pressure chamber () and a low-pressure area and, in the closed valve position, blocks this connection. The productivity and operational safety of such a crusher can then be increased if provision is made that the overload triggering device () has a high-pressure valve (), which, as a result of an overload situation, in its open position establishes a fluid-conveying connection between the pressure chamber () of the hydraulic cylinder () and a low-pressure area and, after the overload situation has ended, is moved into a closed position to block this connection, and in that the triggering pressure required to open the pressure valve () is lower than the triggering pressure required to open the high-pressure valve ().

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Haan, Germany

Rainer Teichert