Operating manual 17.410+411
Pos.: 20
Dateiname
Firma
Datum
Rev
BK-DH 700 x 1000 eng.doc
BRUKS-KLÖCKNER
27.02.09
00
Seite 15 von
61
3.1.16 Rotor turning device (if requested)
For positioning the blades in blade replacement position
With a hydraulically operated unit the chipping rotor of the drum chipper can be
automatically turned into the maintenance position (blade replacement position). This
is carried out with a specific ratchet construction driven by a hydraulic cylinder. Dur-
ing the work clearance stroke this ratchet engages into a toothed disc mounted onto
the rotor shaft, and turns it. By repeating this process the rotor is turned until the re-
spective position is reached.
Inductive proximity switches control the limits of travel of the hydraulic cylinder. With
standstill of the cylinder, a hydraulic shut-off valve blocks the cylinder is in the
reached position.
Because of the special shape of the ratchet and the blocking of the cylinder in main-
tenance position there is no need for a locking pin for blocking the rotor.
This also prevents overtravelling the maintenance position because of the rotor iner-
tia.
