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

#title urban and regional planning.., name and elaborate the decision probl...

name and elaborate the decision problems in urban and regional planning?

Inversion circle, what do you understand by inversion circle?

what do you understand by inversion circle?

Oil supply failure - propeller, Oil supply failure - Propeller: To prev...

Oil supply failure - Propeller: To prevent an overspeed caused by an oil supply failure, one of two methods may be employed: • Hydraulic lock valve The pitch lock mecha

Calculate the thermal conductivity, A steak which is 2.5cm thick is cooking...

A steak which is 2.5cm thick is cooking in a frying pan which has a 4mm thick base. The electric element used to heat the pan is turned to a level such that the bottom surface of t

Aviation, Aircraft maintenance engineering

Aircraft maintenance engineering

Flames obtained in an oxyacetylene gas welding process, Q.  Describe the t...

Q.  Describe the types of flames obtained in an oxyacetylene gas welding process giving the applications. There are three types of flames in the gas welding on the base of the

Blanking, Blanking involves cutting of the sheet metal along a closed outl...

Blanking involves cutting of the sheet metal along a closed outline in a single step to separate the piece from the surrounding stock. As shown in figure, the path that is cut out

Design structure matrix, what are the types of interactions in the design s...

what are the types of interactions in the design structure matrix?

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