PISTON GUIDING ELEMENT, ROCK DRILLING MACHINE AND METHOD

A piston guiding element, rock drilling machine and method for supporting a front end portion of a percussion piston of a rock drilling machine. The element (20) comprises a braking recess (16) at its rear end (24). The element further comprises at least one bearing sleeve (29) which is provided wit...

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Bibliographische Detailangaben
Hauptverfasser:	LÄÄKKÖLÄ, Mr. Esa, VIINIKKA, Mr. Matti, KELA, Mr. Timo, KOSKIMÄKI, Mr. Antti, KANDELIN, Mr. Lars, HÄMÄLÄINEN, Mr. Mikko
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	BLASTING CYLINDERS EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING ENGINEERING ELEMENTS AND UNITS FIXED CONSTRUCTIONS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HAND TOOLS HEATING LIGHTING MANIPULATORS MECHANICAL ENGINEERING MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS PERCUSSIVE TOOLS PERFORMING OPERATIONS PISTONS PORTABLE POWER-DRIVEN TOOLS SEALINGS THERMAL INSULATION IN GENERAL TRANSPORTING WEAPONS
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Beschreibung
Zusammenfassung:	A piston guiding element, rock drilling machine and method for supporting a front end portion of a percussion piston of a rock drilling machine. The element (20) comprises a braking recess (16) at its rear end (24). The element further comprises at least one bearing sleeve (29) which is provided with two axially successive slide bearing sections (AS1, As2). Hydraulic fluid is conveyed between the slide bearing sections via a feed system (21). L'invention porte sur un élément de guidage de piston, sur une machine de forage de roche et sur un procédé pour supporter une partie d'extrémité avant d'un piston de percussion d'une machine de forage de roche. L'élément (20) comprend un évidement de freinage (16) à son extrémité arrière (24). L'élément comprend en outre au moins un manchon de palier (29) qui est pourvu de deux sections de palier de glissement axialement successives (AS1, As2). Le fluide hydraulique est transporté entre les sections de palier lisse par l'intermédiaire d'un système d'alimentation (21).