The MAAG Synchronizing Clutch Coupling Program and its ...
The MAAG Synchronizing Clutch Coupling Program and its ...
The MAAG Synchronizing Clutch Coupling Program and its ...
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
8<br />
<strong>The</strong> diagram below shows an arrangement<br />
for a CODAG marine propulsion system.<br />
This system requires three synchronizing<br />
clutches, 2 MS types <strong>and</strong> 1 DS type. <strong>The</strong> arrangement<br />
combines a gas turbine with a<br />
diesel engine.<br />
Normally, a speed change gearset (gearbox<br />
A) is required at the cruise diesel engine<br />
when the booster is added to the drive<br />
system to be operated in combined mode<br />
(CODAG). This is necessary to prevent the<br />
diesel engine overspeeding.<br />
<strong>The</strong> gas turbine booster drive is clutched<br />
to the main gearbox by an MS clutch (B).<br />
<strong>The</strong> + sign indicates that the clutch engages<br />
automatically when the turbine input speed<br />
overruns the input pinion speed.<br />
View of DS synchronizing clutch coupling<br />
In cruising mode when the Diesel only is driving<br />
clutch C <strong>and</strong> A (+ end) are engaged <strong>and</strong> locked,<br />
clutch B <strong>and</strong> A ( end) are disengaged. Torque is<br />
transmitted by clutch C only.<br />
In GT only driving mode clutch B <strong>and</strong> A ( end)<br />
are engaged <strong>and</strong> locked, clutch C <strong>and</strong> A (+ end)<br />
are disengaged. Torque is transmitted by clutch B<br />
only. Gearbox A is at st<strong>and</strong>still.<br />
In CODAG mode, Diesel <strong>and</strong> GT driving, clutch A<br />
(+ <strong>and</strong> – end) <strong>and</strong> B are engaged <strong>and</strong> locked,<br />
clutch C is disengaged.<br />
<strong>The</strong> diesel engine cruise drive is clutched to<br />
the main gearbox by an MS clutch (C). <strong>The</strong><br />
+ sign again indicates the same functions<br />
as above.<br />
For both drivers to operate together, it is necessary<br />
to transmit the power of the diesel<br />
engine through a ratio matching gearset,<br />
(gearbox A) such that the engine can operate<br />
in <strong>its</strong> most efficient operating condition.<br />
This requires a DS clutch (A) which is freewheeling<br />
in either gas turbine only mode or<br />
diesel engine only mode, <strong>and</strong> which is engaged<br />
<strong>and</strong> locked (both the + <strong>and</strong> – ends)<br />
when operating in CODAG mode. <strong>Clutch</strong>es<br />
B <strong>and</strong> C also have a locking capability in their<br />
respective modes to prevent disengage ment<br />
if negative torques are encountered during<br />
normal propulsion mode operation.<br />
Main Gearbox<br />
<strong>Synchronizing</strong><br />
clutch coupling<br />
type MS<br />
bull gear<br />
Gearbox A<br />
<strong>Synchronizing</strong><br />
clutch coupling<br />
type MS<br />
<strong>Synchronizing</strong><br />
clutch coupling<br />
type DS<br />
Hydraulic<br />
coupling<br />
Gas<br />
turbine<br />
Diesel<br />
engine
Change language