Method and apparatus for adapting the operational behavior of a

Details Method and apparatus for adapting the operational behavior of a Method and apparatus for adapting the operational behavior of a

1991-11-20

1992-12-29

Yost, Frank T.

Tool driving or impacting

Processes

173 2, 173176, 173206, 91300, 91321, 175 27, E21C 332

Patent

active

051743876

ABSTRACT:
A control system for a hydraulic percussion mechanism (6) is based on the continuous measurement of the striking rate (z) of the striking piston, or on the continuous measurement of the striking rate (z) of the striking piston together with the quantity per unit time (Q.sub.e) of the hydraulic driving medium coming into the percussion mechanism (6). One, or possibly both, of these parameters is measured from outside the percussion mechanism itself. The control system is configured in such a way that the internal resistance of the percussion mechanism or the hydraulic pump which powers it is increased if there is an increase in the striking rate (z) or the ratio z/Q of the striking rate to the incoming stream rate beyond respective limit values.

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