March 2007 Controllable Pitch Propellers

Integrated cylinder

External cylinder

Overview of a CPP installation

March 2007 Controllable Pitch Propellers

Oil Distribution BoxCylinder

Pitch repetitor

Half housing

Stern tube side

Propeller shaft Oil pipes

Push Pull rod

Gearbox side – Pitch actuation

March 2007 Controllable Pitch Propellers

Hull tube

Chock fastassembly

Stern tubePlain bearingsSealsBlades

Propeller shaft

Propeller hub

Yoke

Push Pull rod

Propeller side – Blade rotation

March 2007 Controllable Pitch Propellers

Hydraulic circuit

The oil can be sucked directely from the gearbox housing. A twin stage pump is used.

The first stage is for the gearbox pressure and lubrication.

The second stage is for the blades actuation.

An other solution is to use oil coming froman independant hydraulic unit.

Can be fitted with two electric pump in case of classification request.

March 2007 Controllable Pitch Propellers

• The complete system is supplied including:Stern tube

White metal bearingsFwd and Aft seals

Stern tube - Seals

• The hollow bored propeller shaftwill be fitted with a push pull rod connecting the Servo unit with the mechanism in the hub

March 2007 Controllable Pitch Propellers

Electronic remote control

Engine LoadEngine Rpm

Clutch

Shaft Rpm

Pitch

DPSor

Others

ElectronicCentral

Unit

SlaveControlPanel

Wing 2 ControlPanel

Master ControlPanel

Wing 1 ControlPanel

ECR ControlPanel

March 2007 Controllable Pitch Propellers

Electronic remote control

-The pitch can be adjusted with constant rpm of the engine. Used with power take off applications.

-In combinator mode, pitch and engine rpme are linked.

Wheelhouse panelswith DP Interface

(Dynamic Positioning)

Electronic Central Unit withEmergency Telegraph

March 2007 Controllable Pitch Propellers

Applications

Passenger boats Fishing boats

Tankers – General Cargos

March 2007 Controllable Pitch Propellers

Applications

Dredgers Tugs – Fifi boats

River boats

March 2007 Controllable Pitch Propellers