Lubrication system on bearing for turbine engine. Include with major component inside the system

1. 15.10 Lubrication System
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2. SYSTEM OPERATION

3. SCHEMATIC DIAGRAM

4. FULL FLOW OIL SYSTEM

5. TYPE OF BEARING LUBRICATION
• Spray Jet/pressure Fed (direct oil to bearing)
• Splash Oil (for light loading bearing)
• Metered Oil (supply right quantity oil depend
on speed of engine)
• Film Lubrication ( surface separated by oil)
• Squeeze film (minimise the effect of dynamics
loads)

6. OIL TANK
• Clasified by hot tank(oil cooler downstream) or cold
tank(oil cooler upstream)
• Located aboved the pump assy (for +ve flow)
• Either vented or pressurize( for +ve flow)
• Component :
– Anti siphon tube
– Gravity filler (prevent major loss of oil due to not
properly fitted cap)
– Oil quantity transmitter (for indicator EACAS)
– Pressure fill and overflow port (provide option filling
tank using presurize cart)

8. OIL PUMPS
• To supply oil under pressure
• Type :
– Vane Pump (low pressure)
– Gerotor Pump (high pressure)
– Gear type pump (high pressure)

9. Vane Pump
Gerotor Pump Gear Pump
In
Out

10. FILTER
• Purpose to prevent any material (debris) other than fluid to
pass through.
• Type :
– Cleanable Screen Filter
• From woven wire and reuse after cleaning
• Filter above 40micron
– Fiber filter
• Can screen down to 15 micron
– Threrad filter
• Last chance filter fit before bearing chamber
– Scavenge Screen Filter
• Fit to individual scavenge line
• To catch large debris
• The base is fit with magnetic chip detector
• Indicate when detect metal like pop out

11. FUEL COOL OIL COOLERS (FCOC)
• Purpose : Cool the oil and warm the fuel
• Located in fuel system immediately before LP
fuel filter

12. Air-Oil Seperation
• Oil gain air after presurisation at the return oil.
• Deareator is fix at top of oil tank on the return
oil to seperate/baffle air from oil.
• Air is vented or regulated to maintain +ve
pressure.

13. MAGNETIC CHIP DETECTOR (MCD)
• Purpose is to attract and hold ferrous metal
particles in the system
• Can cause wear or damage to system
• Need to inspect frequently the present of grey
metallic paste.
• Other type is Indicating
Magnetic Chip Detector
and Pulse Chip Detector

14. ANTI STATIC LEAK CHECK VALVE
• Keep presurize bearing with oil after engine
shut down
• Use anti siphon tubes with check valve
Shiphon valve