High-pressure pump

A jaw crusher, comprising:

• a stationary crushing jaw;
• a movable crushing jaw movable relative to the stationary crushing jaw, a crushing gap being defined between the stationary crushing jaw and the movable crushing jaw;
• at least one actuator configured to adjust a position of the movable crushing jaw relative to the stationary crushing jaw to increase the crushing gap when a non-crushable object enters the crushing gap, the at least one actuator including a first chamber and a second chamber;
• a tensioning cylinder configured to bias the movable crushing jaw away from the stationary crushing jaw, the tensioning cylinder including a first chamber and a second chamber;
• a pressure accumulator;
• a high-pressure pump configured for overload protection of the crushing jaws, the high-pressure pump including a housing and a pump actuation element movably received in the housing, the pump actuation element including at least one piston;
• wherein the high-pressure pump is connected in fluid-conveying manner to the at least one actuator and to the tensioning cylinder such that in a pump stroke of the pump actuation element a transfer fluid is pumped into the second chamber of the at least one actuator and the second chamber of the tensioning cylinder to increase the crushing gap;
• and
• wherein the at least one actuator and the tensioning cylinder are connected to the pressure accumulator such that a quantity of transfer fluid displaced from the first chamber of the at least one actuator and the first chamber of the tensioning cylinder during the pump stroke is temporarily stored in the pressure accumulator.