HYDRAULIC SYSTEM WITH SAFETY MODE, ROCK DRILLING RIG AND METHOD

A hydraulic system, rock drilling rig, and method for limiting output performance of a hydraulic drilling actuator (Ha) temporarily under execution of a safety function feature of a hydraulic system (HS). The output performance is limited by limiting produced hydraulic fluid flow in a hydraulic circ...

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Bibliographische Detailangaben
Hauptverfasser:	VERHO, Samuli, PARKKINEN, Pertti, HONGELL, Teemu, RANTANEN, Juho, VATANEN, Harri
Format:	Patent
Sprache:	eng
Schlagworte:	EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING FIXED CONSTRUCTIONS MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
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Beschreibung
Zusammenfassung:	A hydraulic system, rock drilling rig, and method for limiting output performance of a hydraulic drilling actuator (Ha) temporarily under execution of a safety function feature of a hydraulic system (HS). The output performance is limited by limiting produced hydraulic fluid flow in a hydraulic circuit (CL, OL) of the hydraulic drilling actuator, whereby restricted magnitude of the fluid flow is produced at a hydraulic pump. This way a restricted operation mode (ROM) is en-abled and is controlled by a control unit (CU).