| 摘要 |
<p>A method, arrangement and valve for controlling rock drilling. In the method, a pressure difference acting across a rotation motor is used to regulate a separate feed regulating valve, which, on the basis of this, regulates control pressures of a feed control valve. The arrangement comprises a separate feed regulating valve, which, under the influence of the pressure difference acting across the rotation motor, regulates control pressures of a feed control valve. The valve comprises a separate retarding element, which slows down the returning of a spool of the valve to the normal position, if the spool has moved away from its normal position under the influence of the pressure difference acting across the rotation motor.</p> |
