Oil pumps - aircraft engine, Other Engineering

Assignment Help:

OIL PUMPS

The oil pumps fitted in a recirculatory system are normally gear-type or Gerotor type pumps. The pumps are usually mounted in a pack containing one pressure pump and several scavenge pumps. They are driven by a common shaft through the engine gear train.
Gear type pumps require suitable machining of the gear teeth, or the provision of a milled slot in the casting (adjacent to the delivery side of each pump), to prevent pressure locking of the gears.

Gerotor type pumps use an inner and outer rotor, where the inner rotor is driven by the engine, and the outer rotor which has an extra gear tooth rotates with it. The inner rotor is eccentric to the outer and it is the stepping of the teeth that pumps the oil. The pump also requires kidney shaped slots as inlet and outlet ports.

303_oil pump.png

The scavenge pumps have a greater capacity than the pressure pump to ensure complete scavenging of the bearings in a dry sump system. Furthermore, air tends to leak into the bearing housings from the air pressurised seals and this aeration of the oil means that the scavenge pumps have to pump an increased oil/air volume. As we saw in the previous paragraph the air is subsequently removed by the de-aerator.

 


Related Discussions:- Oil pumps - aircraft engine

Auxiliary power unit oil system, Auxiliary power unit oil System: A sum...

Auxiliary power unit oil System: A sump at the bottom of the gearbox collects the returning oil, in some APU's the rear face of the sump is finned and let into the intake plenu

Guidance systems , The design and implementation of an autonomous guidance ...

The design and implementation of an autonomous guidance system requires knowledge and an understanding of a wide range of technologies, from the physical dynamics of the vehicle (i

Ticket EM134795S38_1, Do you receive my payment $480 for the Ticket EM13479...

Do you receive my payment $480 for the Ticket EM134795S38_1 today Feb 20/2017? Please inform me to know. My Email is: Thank you

Rayleigh scattering, how rayleigh scattering occurs in optical fiber cable

how rayleigh scattering occurs in optical fiber cable

Crude oil assy, what is the importance of cetane number in crude oil assy?

what is the importance of cetane number in crude oil assy?

Aieee, aieee ka course karne ke liye kya karna padega

aieee ka course karne ke liye kya karna padega

Hot and cold working, advantages and disadvantages of cold and hot working

advantages and disadvantages of cold and hot working

Class number arrangement - library management, Class Number Arrangement   ...

Class Number Arrangement   Unlike the Cities Numbers of Dewey Decimal Classification the Colon Class Numbers have not only Arabic Numerals but also capital letters of the Roman

Air-system in aircraft engine, Air-System in Aircraft Engine: In the wo...

Air-System in Aircraft Engine: In the working cycle and airflow section we discussed the main airflow and working cycle of a gas turbine engine and found that a major function

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd