Method and an arrangement for controlling the supply of air into a rock drilling machine
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United States of America Patent
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Apr 25, 1995
Grant Date -
N/A
app pub date -
Nov 12, 1993
filing date -
May 23, 1991
priority date (Note) -
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Abstract
A method and an arrangement for controlling the supply of air into a rock drilling machine. In the method, the air supply of an air compressor in a power unit operated by a diesel engine is adjusted so that when the percussion pressure of the percussion device of the rock drilling machine is high, the amount of air supplied by the compressor is small, and vice versa. In the arrangement, the pressure fluid pump of the hydraulic motor of the compressor is an adjustable-displacement pump, the volume flow of the pressure fluid supplied by the pump being adjusted inversely proportionally to the pressure of the supply conduit of the percussion device of the rock drilling machine.
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