Podcast
Questions and Answers
When is the electric/standby pump used in the CRP system?
When is the electric/standby pump used in the CRP system?
What is the primary function of the OD Box in the CRP system?
What is the primary function of the OD Box in the CRP system?
What happens to the hydraulic oil in the HOPM?
What happens to the hydraulic oil in the HOPM?
What is the purpose of the head tank in the CRP system?
What is the purpose of the head tank in the CRP system?
Signup and view all the answers
Under which condition would the emergency hydraulic pump be used?
Under which condition would the emergency hydraulic pump be used?
Signup and view all the answers
What is the main purpose of the Main Reduction Gear (MRG)?
What is the main purpose of the Main Reduction Gear (MRG)?
Signup and view all the answers
What type of gear system is used in the MRG?
What type of gear system is used in the MRG?
Signup and view all the answers
How many line shaft bearings are located on the starboard shaft?
How many line shaft bearings are located on the starboard shaft?
Signup and view all the answers
What is the purpose of the Power Turbine Brake (PT Brake)?
What is the purpose of the Power Turbine Brake (PT Brake)?
Signup and view all the answers
Where is the starboard Main Thrust Bearing located?
Where is the starboard Main Thrust Bearing located?
Signup and view all the answers
What are the two methods to inflate the inflatable shaft seal in case of seawater leakage?
What are the two methods to inflate the inflatable shaft seal in case of seawater leakage?
Signup and view all the answers
What is the primary purpose of the Bulkhead Seals?
What is the primary purpose of the Bulkhead Seals?
Signup and view all the answers
Under what conditions is the Brake Mode activated in the GTM?
Under what conditions is the Brake Mode activated in the GTM?
Signup and view all the answers
Flashcards
Controllable Reversible Pitch Propeller (CRP)
Controllable Reversible Pitch Propeller (CRP)
A propulsion system that changes propeller blade pitch for thrust without altering shaft rotation direction.
Hydraulic Oil Power Module (HOPM)
Hydraulic Oil Power Module (HOPM)
A component that divides hydraulic oil into control and power oil for the CRP system.
Oil Distribution (OD) Box
Oil Distribution (OD) Box
Controls blade position by directing high-pressure hydraulic oil to the hub.
Emergency Hydraulic Pump
Emergency Hydraulic Pump
Signup and view all the flashcards
Electric/Standby Pump
Electric/Standby Pump
Signup and view all the flashcards
Main Reduction Gear (MRG)
Main Reduction Gear (MRG)
Signup and view all the flashcards
Double Input
Double Input
Signup and view all the flashcards
High Speed Flexible Coupling Shaft (HSFCS)
High Speed Flexible Coupling Shaft (HSFCS)
Signup and view all the flashcards
Synchronizing Self-Shifting (SSS) Clutch
Synchronizing Self-Shifting (SSS) Clutch
Signup and view all the flashcards
Power Turbine Brake (PT Brake)
Power Turbine Brake (PT Brake)
Signup and view all the flashcards
Main Thrust Bearing
Main Thrust Bearing
Signup and view all the flashcards
Stern Tube Seal
Stern Tube Seal
Signup and view all the flashcards
Bulkhead Seals
Bulkhead Seals
Signup and view all the flashcards
Study Notes
Main Reduction Gear (MRG) and Shaft-ing
- Purpose: Converts high-speed, low-torque input from the GTMs to low-speed, high-torque output for the shaft and propeller.
- Physical Description:
- Double input (two engines).
- Double reduction (speed reduced twice).
- Double helical, V-shape gears (better thrust, reduce noise).
- Single output (one shaft).
- Articulated.
- Locked train (all gears rotate together).
High Speed Flexible Coupling Shaft (HSFCS)
- Connects main engines to the MRG.
Synchronizing Self-Shifting (SSS) Clutch
- Located on the MRG (port and starboard sides).
- Purpose: Engage and disengage main engines to the MRG.
- Operation: Engages when engines are rotating at higher speeds, disengages at lower speeds.
Power Turbine Brake (PT Brake)
- Holds power turbine stationary until engine is online.
- Purpose: Used in emergency conditions.
- Operation: Decreases GTM speed to idle and engages at 2200 rpm.
Main Thrust Bearing
- Absorbs axial thrust from the shaft and transmits it to the ship's hull.
- Each MRG has its own thrust bearing (starboard in Aux2, port in shaft alley).
Line Shaft Bearing
- Supports radial support of the shaft.
- Starboard shaft has two bearings (1A in MER2, 1B in shaft alley).
- Port shaft has one bearing (2A in shaft alley).
Strut Bearing
- Supports the weight of the shaft and provides radial support.
- Located outside the ship's hull aft of the shaft alley. Each shaft has a strut bearing.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Related Documents
Description
Explore the essential components of marine propulsion systems, focusing on the Main Reduction Gear (MRG), High Speed Flexible Coupling Shaft, Synchronizing Self-Shifting Clutch, and Power Turbine Brake. This quiz will help you understand the mechanics and functions behind these critical systems in marine engineering.