THE NEW GENERATION OF LARGE SRPs/STPs
SCHOTTEL AZIMUTH THRUSTERS
YOUR PROPULSION EXPERTS
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NEW THRUSTER GENERATION
The SCHOTTEL Rudderpropeller is the classic product from
the SCHOTTEL range.
Since its origin more than 60 years ago, the SRP has been continuously improved and adapted to the needs of our customers.
Now a new thruster generation has been released, hydrodynamically optimized using CFD techniques as well as model
tests. The latest findings in azimuth thruster technology have
been implemented, resulting in a state-of-the-art product.
Both types are available with a variety of reduction ratios to suit
all common input speeds regardless of whether they are driven
by a diesel engine or an electric motor.
However, the new thruster series offers a high commonality of
parts throughout the different reduction ratios – resulting in
enhanced spare parts availability.
The thruster is even more compact than the existing models
and is a practically self-contained system requiring only a minimum of mechanical and electrical interfacing.
The new generation is of course available with either a single
propeller, known as the SRP, or a twin propeller with two propellers on one shaft rotating in the same direction, known as
the STP.
SRP
STP
SRP · Rudderpropeller
STP · Twin Propeller
FOR DEMANDING APPLICATIONS
OFFSHORE
The new thruster generation is ideal for any kind of offshore operation. Robustness, compactness, eco-friendliness and ease of
maintenance are a prerequisite for ships working in the harsh
offshore environment. All thrusters are prepared for integration
of the SCHOTTEL Condition Monitoring System S-COM which
allows foresighted maintenance planning.
TUGS
Tug operation profiles are becoming more and more demanding
and require high power on a space-restricted platform. With its
improved hydrodynamic and compact design, the new thruster
series offers the optimum answer to these demands.
FERRIES
SCHOTTEL azimuth thrusters have proven their uniqueness in
many ferries, already providing excellent manoeuvrability to
each vessel. Not only the SRP but even more so the SCHOTTEL
Twin Propeller is in many cases the first choice thanks to its
compact design and high efficiency.
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HYDRAULIC CLUTCH
The new thruster generation comes with an independent,
hydraulically operated multi-disc clutch, which not only engages
and disengages the drive train from the thruster but also drives
the hydraulic units of the thruster, making it practically selfcontained.
To improve the ease of maintenance and simplify the system as
much as possible, the clutch is installed separately outside the
gearbox and uses the same type of oil for operation and cooling
as is used for lubrication of the thruster. No additional auxiliary
units are needed to operate the clutch.
Hydraulic clutch
with pulley to drive
the steering pump
SRP · Rudderpropeller
STP · Twin Propeller
HYDRAULIC MULTI-DISC BRAKE
In addition to the hydraulically operated clutch, the new
thruster generation comes with a hydraulically operated multidisc holding brake, which is used to block the propeller from
turning during service and maintenance work.
The brake basically follows the same principle as the hydraulic
clutch except that it has a fixed outer part fitted to the gearbox
housing.
Multi-disc
hydraulic brake
Like the clutch, the brake is a separate system outside the
upper gearbox and is fully self-contained, requiring no
mechanical interface or auxiliary units outside the thruster.
The brake, too, uses the same type of oil as used for thruster
lubrication.
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LATEST DEVELOPMENTS
SLIPPING CLUTCH
SCHOTTEL offers a new hydraulic slipping clutch, which can be
mounted on the upper gearbox instead of the standard clutch.
To sustain the ease of maintenance, the clutch comes in a separate housing which provides a power take-off for driving the
hydraulic steering equipment. Thus the complete thruster is as
self-contained as with the standard clutch, but needs only a
minimum of mechanical and electrical interfaces.
PTO drive
Low noise
In addition to the engaging and disengaging function of a standard
clutch, the slipping clutch offers the possibility of controlling the
propeller rpm from almost zero to the idle speed of the engine
and is thus an ideal add-on for diesel direct-driven DP 2 vessels
with fixed pitch propellers, double-ended ferries and tugboats
using an engine with high idle speed.
Slipping clutch
Hydraulic steering pump
attached to the slipping
clutch PTO
Wet running
without wear,
slipping
operation
Sensors for
monitoring
Self-contained system oil supply
closed system, trouble-free operation
FUNCTIONAL PRINCIPLE
PM’s full speed
100 %
SPEED
n
io
al
te
ra
t
d
sp
ee
Prime mover from
idle to full speed
PM
Clutch fully engaged
100 %
Prime mover idling &
clutch modulating
30 %
PM idling
tc
h
u
Cl
in
at
ul
0%
g
od
m
0%
0%
30 %
COPILOT LEVER POSITION 100 %
SRP · Rudderpropeller
STP · Twin Propeller
STATE OF THE ART
STEERING AND CONTROL
With the SCHOTTEL Operation Diagnosis System S-ODS the
crew can retrieve all relevant system data for further diagnosis
or analysis. Thanks to the intuitive user interface, these data can
be quickly and easily sent to the SCHOTTEL Service Team or to
Fleet Management. This analytical tool makes the on-board
assignment of a service technician unnecessary. Deviations from
the optimum operating condition (e.g. fuel or energy consumption)
can be identified and corrected by on-board personnel and settings can be calibrated. This form of interactive communication
enables malfunctions to be quickly and efficiently rectified and
downtimes to be significantly minimized.
The system can also be retrofitted on older plants. The quickest
and most efficient form of system analysis is via secure remote
access (satellite, UMTS). Alternatively, the data can also be
conventionally transferred using a USB stick and then by e-mail.
ADVANTAGES OF S-ODS
• Optimization/avoidance of service assignments due to up-front
analysis of faults
• On-line diagnosis by remote access
• Optimization of maintenance intervals
• Detailed fault analysis
• Intuitive alarm and fault history for maintenance optimization
• Reduction of failure risk and off-hire periods
• Parameters can also be optimized by on-board personnel
• Simple system diagnosis
• Communication link to Fleet Management
The SCHOTTEL Copilot lever has been redesigned taking the
latest ergonomic expertise into account. All necessary functions
are available on a smaller platform.
PROFESSIONAL
PARTNERSHIP –
THROUGHOUT THE
VESSEL’S LIFE
As a SCHOTTEL customer, you benefit from
individual, in-depth advice and support at all
stages of a project, from planning and commissioning through to preventive maintenance.
SCHOTTEL GmbH
Mainzer Str. 99
D-56322 Spay / Rhein
Germany
Tel.: +49 (2628) 61 0
Fax: +49 (2628) 61 300
24 h Emergency Hotline
+49 (171) 47 29 154
For further addresses: www.schottel.de
© SCHOTTEL 02/2013
The name of SCHOTTEL traditionally stands
for quality in engineering, with over 90 years
of experience in design and the precision
workmanship of a family-owned enterprise.
Our innovative propulsion systems are a
byword for reliability and high performance
and set standards in global shipping.
YOU CAN FIND US HERE
A dense worldwide service network is ready
to offer assistance and ensures the swift
supply of spare parts – along with experienced
SCHOTTEL technicians if required.