Innovative Power Transmission

Propulsion Motor Bearings and Thrust Bearings

for Naval Application (Submarines)

2

Bearings for Naval Application

The development of RENK Hannover bearings for naval application goes back to 1950, when the first propeller shaft bearings were manufactured.

Today, the range of RENK Hannover bearings for naval application is extensive and extremely varied. The classic propeller shaft bearings are comple-mented by free-standing marine propulsion thrust blocks; also thrust bearings for propulsion motors, generators, gearboxes and dredger pumps. RENK bearings are characterized by key functional features such as: • compact design• self-lubricated• electrically insulated• low power loss• non-magnetic• operation in flooded conditions • shock prooffactory tests under operating conditions.

Factory Acceptance Test

In the manufacture of naval bearings RENK do not rely only on advanced computer aids for design and per-

formance prediction. The bearings themselves undergo extensive tests in the company's own

test department. Fully equipped test rigs permit simulation of real operating conditions, as they are specified to occur when the vessel is in service. There is no doubt that the submarine bearing test rig is something special. Simulation of inclination angles up to 60 degrees is possible

on this rig.

The trim and list movements of a ship can be also simulated on another spe-

cial test rig. The reliability of RENK bearings for naval applications

1 Thrust bearing type LAZ 280 and drive engine bearing type LRZ 200/280 for location of the propeller shaft in class 212 submarine. ( Courtesy HDW )

2 Propulsion bearing type LAZFU 30-300 - AS (DE)

3 Propulsion motor Permasyn PEM DRIVE for submarine fitted with RENK bearing type LRZ 200/280. ( Courtesy Siemens Marine Solutions )

Fig. 3

Fig. 2

Technical Features of RENK Bearings for Naval Application

Fig. 1

3

under normal and extreme operational conditions can be proven efficiently and dependably.

All tests are carried out under nominal load, taking into consi-deration the customer's specifications. All temperature and pressure values are electronically registered during the testing and therefore can be made available to the customer.

Supported by efficient CAD and FEM programmes the design of the bearings can be enhanced to the extent where RENK bearings operate absolutely failure free. The reliability of RENK bearings even in borderline applications is unrivalled.

The Quality Insurance System operated at RENK is certified by DET NORSKE VERITAS in full compliance with ISO 9001 and ISO 14001.

4 Generator bearing on the test rig for ship movement.5 Thrust bearing type Axilus LAZ 280 tested under nominal thrust at

nominal speed and under submerged thrust at loitering speed. 6 Efficient and up-to-date CAD and FEM programmes support the design

and construction of naval bearings.7 On the special test rig under 60° inclination a submarine propulsion motor

bearing under radial and thrust load at nominal and loitering speed.

Fig. 4

Fig. 5

Fig. 7

Fig. 6

Bearings for Naval Application

2012

2011

201020092007 20062003

2001

1999

199819951994

1993 199119891987

1960

RENK AKTIENGESELLSCHAFT

Werk HannoverWeltausstellungsallee 2130539 HannoverGermanyTel.: + 49 ( 0 ) 511.86 01-0Fax: + 49 ( 0 ) 511.86 01-182E-Mail: info.hannover@renk.biz

www.renk.eu RH

-122

7 ( 7

.11

) Prin

ted

in G

erm

any

Subject to changes due to technical progress.

Country Class Quantity Yard

Brazil ScoRPEnE 4 DcnS / Brasilian YardsItaliy 212 2 Fincantieri, ItalySouth Korea 214 6 TKMS / DSME KoreaIndia ScoRPEnE 6 DcnS, Indian YardsIsrael DolPHIn 2 TKMS, Kiel Germany 212 2 TKMS, KielPortugal 209 Pn 2 TKMS, Kiel Spain S-80 4 navantia, Spain South Korea 214 3 HDW, Kiel and DSME, KoreaMalaysia ScoRPEnE 2 DcnSSouth Africa 209 3 HDW, Kiel and TnSW, EmdenGreece 214 4 HDW, Kiel and Helenic ShipyardsTurkey 209/1400 4 HDW, Kielchile ScoRPEnE 2 DcnSItaly 212 2 Fincantieri, ItalyBrazil 209/1400 1 HDW, KielGermany 212 4 HDW, KielIsrael DolPHIn 1 TnSW, EmdenTurkey 209/1400 2 HDW, KielSouth Korea 209/1200 3 HDW, KielIsrael DolPHIn 2 HDW, Kiel and TnSW, EmdenSouth Korea 209/1200 3 HDW, KielTurkey 209/1400 2 HDW, KielSouth Korea 209/1200 3 HDW, Kiel

Germany 205 14 HDW, Kiel

Extract from Reference List for Submarine Bearings

over the last 50 years REnK slide bearings were equipped in more than 160 submarines.