Mannesmann Aktiengesellschaft

Bernd Schuhmann

Heinz M Hiersig

Wilhelm F Schafer

Max Thiemann

A high-speed drive shaft is connected to dredge pump shaft by a planetary gear, upon which a controlled speed is superposed, by branching power off the high-speed shaft for driving an auxiliary adjustable pump which, in turn, runs a hydrostatic motor whose rotary output is connected to the ring gear of the planetary gear via a transmission which includes two brakes and a speed-responsive clutch; one brake is also speed-responsive, the other one is responsive to motor pressure, to provide a possibly redundant system for preventing torque transmission to the motor, e.g., in case of dredge pump blockage.

Reduction gear and speed control for dredge pumps

A shaft carrying a cutter head is bolted to the output shaft of a speed reducer gear in coaxial configuration and having a casing journalled on the shaft. The casing carries plural drive motors and the gear has a combining stage as input. The shafts are mounted in thrust and pendulum bearings in a frame and the casing is held against rotation on that frame. The output stage of the gear is a planetary gear with a spider from which extends the output shaft and a hollow shaft and in opposite directions. The casing is journalled on the shaft by bearings engaging the hollow shaft and the output shaft at opposite sides of the spider.

Growing community of inventors

Munich, Georgia

Bernd Schuhmann