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

Vectors and Scalar., Application of Vector and Scalar quantities in Vector ...

Application of Vector and Scalar quantities in Vector Analysis subject

Engine lubrication systems - air craft engine , Engine lubrication systems ...

Engine lubrication systems There are basically two types of lubrication system at present in use in gas turbine engines:- a) Recirculatory. In this system, oil is distribut

Amplitude shift keying, figure of amplitude shift keying & it''s explainati...

figure of amplitude shift keying & it''s explaination

Roll-compacting, Q. Describe the continuous production of metal strip by ro...

Q. Describe the continuous production of metal strip by roll compacting of powder. Differentiate between impregnation and infiltration. Ans. Roll-compacting : It is the

Installing aircraft parts, Installing Aircraft Parts: Prior to fit remo...

Installing Aircraft Parts: Prior to fit remove the label from the engine and attach it to the paperwork for safekeeping. Check the engine over to ensure it is complete and chec

Function generator, Expertsmind.com brings you unique solution in electri...

Expertsmind.com brings you unique solution in electrical engineering   What is a function generator? A function generator is a part of electronic device that prod

Components of amplifier, Expertsmind.com brings you unique solution in el...

Expertsmind.com brings you unique solution in electrical engineering RESISTORS: Resistors are designed to drop the amount of voltage going through them, this allow

Net present value method: npv, Discounted cash flow methods Net present val...

Discounted cash flow methods Net present value method: NPV It is one of the classic methods of evaluating the investment project. Here each potential projects value is find out its

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