Book 3 - Air Sealing

Question 1

___________ air is used to seal the bearing housings, so preventing leakage of oil into the engine main casings or into the compressor inlet

Answer 1

COMPRESSOR air is used to seal the bearing housings, so preventing leakage of oil into the engine main casings or into the compressor inlet

Question 2

air pressurised oil seals reduce the working clearance between rotating and static members to a ________

Answer 2

air pressurised oil seals reduce the working clearance between rotating and static members to a MINIMUM

Question 3

oil seals can take the form of:

• labyrinth seals
• ring seals
• carbon brush seals

Answer 3

oil seals can take the form of:

• labyrinth seals
• ring seals
• carbon brush seals

Question 4

to maintain maintain the pressure difference between two internal engine sections that are subjected to air pressure differences, a _____-air seal is used

Answer 4

to maintain maintain the pressure difference between two internal engine sections that are subjected to air pressure differences, a MULTI-air seal is used