The flashcards below were created by user
beukelman
on FreezingBlue Flashcards.
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State the purpose of the MRG and shafting:
Converts the output of the GTMs (high speed/low torque) into low speed/high torque that is used to turn the shaft.
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State the interface between the MRG and shafting to the propulsion gas turbine engine
Power Turbine -> High speed flexible coupling shaft -> power turbine brake -> Triple S Clutch -> Firt Reduction Gear Pinion.
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Synchro Self Shifting (SSS) clutch
The SSS Clutch connects the GTM to the MRG power train. It is a fully automatic clutch which allows the GTM to connect to and drive the MRG
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Power turbine brake
The Power Turbine Brake holds the GTM Power Turbine stationary and prevents it from spinning and transmitting torque to MRG. It is used to place a running GTM online or off-line.
- Main thrust bearings
- Starbord shaft main thrust bearing is located in AUX 2, and Port shaft main thrust bearing is located in Shaft alley. Keeps the propeller from pulling shaft aft.
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Line shaft bearings
1A is located in Main 2, 2A and 1B are located in Shaft Alley. Support the shaft.
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Strut bearings
Located outside the hull half way between the hull and the propeller, they support the shaft and propellers weight.
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Shaft seals
Built into the stern tubes. The water tight seal between the stern tubes and the shaft.
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Stern tubes
Shaft Alley port and starbord side aft, the point where the shaft penitrates the hull
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Inflatable shaft seals
mounted on the inboard side to the stern tubes. used when shaft seal fails
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Bulkhead seals
anywhere shaft penitrates a bulkhead.
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