109 Controllable Reversible Pitch Propeller (CRP) Fundamentals

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Author:
beukelman
ID:
311481
Filename:
109 Controllable Reversible Pitch Propeller (CRP) Fundamentals
Updated:
2015-11-15 00:01:01
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usshopper
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esws
Description:
crp
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  1. CRP
    Controllable reversible pitch
  2. State the purpose of the CRP system
    provides efficient power plant operation over the entire range or the vessel's ahead and astern operating parameters.
  3. HOPM
    • Hydraulic oil power module
    • establish and regulate the hydraulic system.
  4. Gear/attached pump
    • A high capacity, high-pressure positive displacement hydraulic screw pump.
    • It is mounted on the reduction gear
  5. Electric/standby pump
    • 2 horizontal screw type standby pumps
    • located near the reduction gear
  6. OD box
    • Oil distribution box
    • mounted on the reduction gear casing.
    • It is the interface between the remote control system and the hydraulic/mechanical system.
  7. CRP head tank
    the hydraulic oil head tank is higher than the OD box, to provide a static head to the hydraulic system when the hydraulic pumps are down.
  8. Emergency hydraulic hand pump
    • part of the emergency pitch positioner assembly.
    • The hand pump and the 4-way valve, apply enough oil pressure to the OD box to hold the full emergency ahead position
  9. Hub/blade assembly
    • the regulating valve pin, and liner assembly, inside the piston rod directs the flow of hydraulic oil to the piston.
    • The blade pitch is set at any desired position by controlling this oil flow
  10. CRP
    controllable reversible pitch propeller

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