Mining tricone bit based on roller composite bearing

Mining tricone bit based on roller composite bearing

The invention relates to a mining tricone bit based on a sliding and rolling composite bearing. The mining tricone bit adopts the technical scheme that a roller bearing journal and a boss between the roller bearing journal and a roller bearing journal 5 are both designated cylinders having the diame...

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Hauptverfasser: QIU LINGHUI, QIU CONGMING, CONG SHANHAI
Format: Patent
Sprache:chi ; 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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creator QIU LINGHUI
QIU CONGMING
CONG SHANHAI
description The invention relates to a mining tricone bit based on a sliding and rolling composite bearing. The mining tricone bit adopts the technical scheme that a roller bearing journal and a boss between the roller bearing journal and a roller bearing journal 5 are both designated cylinders having the diameter of d, i.e. a large journal 4; the specified size of the diameter d of the large journal is the same as the specified size of the diameter D of a large circular hole 9 of a roller cone 2 to form a rolling bearing; 6 to 13 roller slots 8 are uniformly drilled on the inner wall of the large circular hole of the roller cone 2, and each roller slot 8 is internally provided with a roller 3; and the rollers 3, the roller slots 8 and the large journal 4 form the rolling bearing. The roller bearing journal 5 is provided with a ball bearing 6, and a small bearing journal 7 is provided with a sliding bearing or a roller bearing. The invention can greatly reduce the contact stress of the large bearing journal 4, improve th
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subjects 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
title Mining tricone bit based on roller composite bearing
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