Shaft disconnecting devices

Propeller Shaft Disconnecting Devices

RENK PSC for connection or separation of engine and propeller; there are three ways of  en-/disengagement:  

  • First: manually en-/disengagement in engine room by manually operated hydraulically actuated connection of gearing .
  • Second: semi-automatic en-/disengagement in engine room by hydraulically actuated connection of gearing (Standard PSC).
  • Third: full automatic en-/disengagement in engine control room by hydraulic actuated connection of gearing




Propeller Shaft Clutch

• Integrated axial bearing for propeller thrust transmission to the main engine thrust bearing • Reliable torque transmission via form locked and backlash free gearing
• Application of gearbox technology: Case hardened, ground and conically gearing
• Hydraulic actuation of the clutch (3 MPa)
• Minimizing of shaft sagging and displacement in disengaged position by core shaft in radial plain bearings
• Compact design by highly alloyed steel
• Extremely low wear by hardened and ground gearing. Thrust pads and core shaft bearings in bronze.
• Avoidance of teeth sticking by axial limitation
• Mechanical emergency blocking
• PSC forming integral part of propeller-shaft. No need of additional bearing support.

Customized Shaft
Disconnecting Devices

RENK clutches of the KAZ type guarantee the safety-critical functionality of an electric PTH (power take home) drive system for conventionally powered ships with a diesel, gas, or electric motor. In the event of damage to the machine, the KAZ can disengage the main machine from the rest of the shaft system. The electric engine, which otherwise serves as a generator (power take out) or booster (power take in), then assumes the function of maneuvering the ship, enabling the vessel and its crew to reach the next secure harbor.
The KAZ clutch works in an opened state as a combined supporting and axial bearing. The propeller thrust is conducted into the stationary thrust bearing of the motor. In the closed state, the KAZ rotates without friction or wear as a rigid component of the shaft system. The KAZ can also be used in vessels with two independent main propulsion systems. In this case, the KAZ prevents a defective drive from rotating with the rest of the system as the result of the propeller being towed through the water, thereby enabling a free “wind milling” with reduced resistance.