Schottel - CP Propeller by Marine Mega Store Ltd

For more details visit www.marinemegastore.com or call 0871 8732404

SCP Controllable Pitch Propellers

Application-oriented propulsion systems

For more details visit www.marinemegastore.com or call 0871 8732404

The SCHOTTEL Controllable Pitch Propeller – the reliable propulsion system for all ships with up to 30,000 kW

SCHOTTEL Controllable Pitch Propeller Systems (SCP) are available in various designs, including:

• X-type, i.e. hydraulic cylinder mounted in the propeller hub • Z-type, i.e. hydraulic cylinder mounted in the propeller shaft Oil is distributed either via an Oil Distribution (OD) box mounted in front of the gearbox (G-type), or via the W-type OD box, which is mounted in the shafting. Therefore different combinations of hydraulic cylinder arrangement and position of oil supply can be implemented. The most common is the X-type hub combined with oil supply in front of the gearbox, the so-called “XG” configuration. Other solutions are the “ZG” version, with the hydraulic cylinder in the shaft and the OD box in front of the gearbox, and the “XW” version, with the cylinder in the hub and the oil supply in the shaft. The “X” type incorporates a hydraulic cylinder with the piston directly connected to the yoke. Hence the design is simple, with a minimum of moving parts, and achieves the highest reliability.

To obtain optimum strength the hub is cast in one piece. The propeller blades are mounted on large-sized blade carriers to minimize the stresses in the system. The yoke moving inside the hub is supported by sliding pieces. Crank pins on the yoke operate the propeller blade carriers, which have grooves guiding the pins. The propeller blades are bolted to the carriers. The hub is sealed by a well-proven system consisting of a pre-loaded sealing ring between the hub and the blade foot. The hydraulic oil flows through an inner and outer oil pipe, both mounted concentrically inside the hollow-bored shaft. The movable double oil pipe also functions as a feedback system indicating the current pitch of the propeller system. The Z-type hub with the hydraulic cylinder within the propeller shaft results in a considerably shorter propeller hub. The shaft-integrated hydraulic cylinder moves the yoke by means of a rod leading through the hollow-bored shaftline. For all systems, propeller blades and hubs are available made of Cu-Ni-Al or even stainless steel. Controllable pitch propellers designed by SCHOTTEL offer the following advantages:

• blocking valves for pitch setting installed in the cylinder space of the hub, easily accessible when docked without dismantling of the hub

• blocking valves allow operation in the ahead condition with 100% engine power without restriction • blades can be dismounted in a nozzle without pulling the shaft • the blade moving pin is part of the cast yoke, which achieves a larger control stroke near the end positions of the blades, allowing finer pitch control. This also results in lower stresses in the pin.

• optimum matching of material between hub and blade carriers • larger hub is cast in one piece, giving a rigid structure

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Company Profile SCHOTTEL-Schiffsmaschinen GmbH, formerly Wismarer Propeller und Maschinenbau GmbH (WPM), can look back on a long history of industrial activity in Wismar, Germany. Previous names were “Alubau Wismar” and “Diesel Motorenwerk Rostock” (DMR). WPM became independent in 1991, and was taken over by SCHOTTEL in 1998. The company delivered its first controllable pitch propeller in 1963. Previously, the propellers were primarily manufactured for the strong East German shipbuilding industry. Today, as part of the SCHOTTEL Group, SCHOTTEL-Schiffsmaschinen GmbH is well-positioned for aggressive development of the international market. Today more than 100 employees use modern facilities to produce the following: • SCP controllable pitch propeller First controllable pitch propeller from systems Wismar built in 1963 for a fishing trawler • shafts for fixed pitch propellers • rudder shafts and machining of rudder 1,210 kW, diameter 3.3 m blades The SCP power range starts at 1000 kW and goes up to 30,000 kW, with corresponding hub diameters from 0.46 m to 2 m. The propellers are available with 3, 4 or 5 blades, the standard version being the four-bladed design. SCHOTTEL supplies the complete package including the CP propeller, shaftline, hydraulic system and remote control system.

In another product line, SCHOTTEL designs and machines shafts of up to 19.5 m in length and 80 t in weight. One 12 m, one 15 m and two 20 m lathe machines are available for manufacturing these large shafts. With its machine capacity the company is excellently equipped for repairs and machining work.

For more details visit www.marinemegastore.com or call 0871 8732404

SCP Types

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Principle:

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Example:

SCP

154

4XG

SCHOTTEL Controllable Pitch Propeller Size of Hub, Diameter in cm Number of Propeller Blades Hub/Control Cylinder Arrangement Hydraulic Oil Supply Arrangement (G: At Gear, W: Inside Shafting) Hub Material Steel Bronce

Position of Control Cylinder

Inside Shafting A Z

Inside Hub C X

Type SCP-XG X-type hub with the servomotor fitted in the hub, the oil supply unit arranged in front of the reduction gear.

Type SCP-ZG Z-type hub with the servomotor in the shaft line, the oil supply unit arranged in front of the reduction gear.

Type SCP-XW X-type hub with the servomotor fitted in the hub and the oil supply unit arranged in the shafting.

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Propeller Design

Remote Control

Designing a CP propeller blade is a complex process, requiring an extensive range of expert knowledge in the specialized fields of fluid physics and mechanical engineering. In addition to hydrodynamic blade design, the calculation of hydrodynamic loads and their effects when the blade pitch is changed and in various operating conditions are of great importance.

The remote control system is designed to provide automatic control of a SCHOTTEL controllable pitch propeller. The system is based on a microprocessor-controlled system architecture with 2-wire bus communication between central unit, ECR and bridge. An HMI (human-machine interface) allows clear, user-friendly control, set-up and maintenance of the system.

In order to provide advanced blade shapes and satisfy ever-heightened requirements, use is made of state-of-theart calculation methods, refined continuously by means of research projects carried out in cooperation with research institutes.

Computed pressure distribution

The blade design is initially executed through the use of circulation theory verification and optimization techniques. Here SCHOTTEL employs two tried-and-tested methods developed at the HSVA in Hamburg and the SVA in Potsdam, which are currently the most powerful programs in existence. Openwater diagrams, pressure distribution, cavitation and pressure fluctuation properties are calculated for all relevant operating states in the vessel’s wake. In addition to close cooperation with research institutes, SCHOTTEL also draws on the invaluable years of experience of leading experts in the field of propeller design. The strength of the blade is verified through the use of FEM (Finite Element Method), achieving the optimum combination of mechanical expedience and hydrodynamic efficiency.

The system is type-tested to GL, LRS and ABS (other classes on request) and meets class requirements according to AUT24 and UMS. Standard features: • Control from ECR, bridge and wings • Combinator and constant speed mode • Up to 3 acceleration programs • Load control management

Cavitation test

Almost every propeller undergoes extensive model tests, where it must prove that it actually possesses the required characteristics with regard to efficiency, cavitation and pressure fluctuations. In these tests the SCHOTTEL design regularly competes head-to-head with technology from other suppliers, and as the results show, SCHOTTEL produces some of the best propeller designs on the market.

• Automatic SLOW DOWN • Automatic SHUT DOWN • Self monitoring • Non-follow-up control from ECR and bridge • Pitch measurement system • Main engine interface

Hydraulic System The pump and motor unit forms an essential part of the hydraulic system. This assembly delivers the oil quantity needed for adjustment of the propeller blades and produces the pressure required for pitch control. Two electrically driven pumps (1 active pump, 1 standby pump, each with 100% capacity) are mounted on the cover of the hydraulic tank, with the pumps running in the oil. The compact control block, incorporating all the indicators and the individual Hydraulic unit instruments necessary for pitch control, is located on the top of the tank. The piping between the pump and motor unit and the oil supply unit is part of the shipyard’s scope of supply. Lubrication oil is fed through the stern tube into the hub. This system is not connected to the hydraulic system of the controllable-pitch propeller unit. Optionally a two-pipe system can be supplied, in which case the hydraulic oil is used to lubricate the hub.

For more details visit www.marinemegastore.com or call 0871 8732404

The system is powered with 24 V DC. A separate supply should be provided for the back-up system. Options: • Engine telegraph systems and electric shaft system in the wheelhouse area • Clutch control system • Interface for DP systems • Interface for manoeuvring printer

For more details visit www.marinemegastore.com or call 0871 8732404

SCP in action

1 COT WOLGASTERN SCP 1414 XG (7860 kW) Shipyard: Gdynia Shipyard, Poland Owner: Rigel Schiffahrt, Germany 1

2 Open Top Container Vessel, Type 168 A 1 x SCP 1294 XG (8400 kW) Shipyard: Sietas-Werft, Germany 3 RoPax ferry NORRĂ&#x2013;NA 2 x SCP 1294 XG (10,800 kW each) Shipyard: Flender Werft AG, Germany Owner: Smyril Line, Faroe Islands 4 Offshore Supply Vessel C. LIBERTY 2 x SCP 0774 ZG (2110 kW each) 2 x STT 1010 T-LK CP (1000 kW) Shipyard: North American Fabricators, USA Owner: Edison Chouest Offshore, USA

5 EGV BERLIN 2 x SCP 1414 XG (5280 kW each) Shipyard: Flensburger Schiffbaugesellschaft, Germany Owner: German Navy

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6 Passenger/Container vessel ZI YU LAN 1 x SCP 1544 XG (15,000 kW) Shipyard: Aker-MTW, Germany Owner: Shanghai Shipping Corporation, PR China

7 AHSV HADI XI 2 x SCP 0714 XG (2025 kW each) Shipyard: Keppel Singmarine, Singapore Owner: Hadi H. Al-Hammam Establishment – Marine Services, Saudi Arabia 8 Atlantik 488, 1 x SCP 119 4 AW (5300 kW) Shipyard: Volkswerft GmbH Stralsund, Germany Owner: Murmansk Trawler Fleet Co., Russia

9 RoRo vessel AKDENÍZ 2 x SCP 1294 XG (8100 kW each) Shipyard: Flensburger SchiffbauGesellschaft, Germany Owner: UND Roro Isletmeri AS, Turkey 9

For more details visit www.marinemegastore.com or call 0871 8732404

Constant customer support Professional commissioning world-wide Preventive maintenance and repairs Close-knit sales and service network

Innovators in steerable propulsion SCHOTTEL-Schiffsmaschinen GmbH · Kanalstr. 18 · D-23970 Wismar / Germany For more details visit www.marinemegastore.com or call 0871 8732404 8 ` Tel.: + 49 (0) 38 41 / 204-0 · Fax: + 49 (0) 38 41 / 204-333 · eMail: info-ssw@schottel.de · www.schottel.de

VPR-525/05 e . Printed in the Federal Republic of Germany

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Our product information provides you with explanations and data for planning plants incorporating units from our current programme. On account of the modifications associated with upgrading, the contents of a specific edition will remain valid for a limited time only. Binding for the application concerned are the data given in our tender specification.

SCHOTTEL for the Shipping World