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

MIMO, I need some help

I need some help

Aero Performance Problem, Given data for an F-4 (W=40000 lb, S=530 ft^2, Ta...

Given data for an F-4 (W=40000 lb, S=530 ft^2, Ta@sea level=35800 lb, Mach=1.5, h=20000 ft (std day), Cd0=.0224, k=.1516) find aircraft''s specific excess power in straight-and-lev

Create and plot signals in ccs , I want to plot x1=4exp(t/4) x2=sin(2Pift+...

I want to plot x1=4exp(t/4) x2=sin(2Pift+pi/2) and x3=x1x2 in CcS

The compression after impact test, This Compression After Impact (CAI) test...

This Compression After Impact (CAI) test fixture was developed by the Boeing Company. The specimen, typically, but not necessarily, a quasi-isotropic laminate, is 6" long, 4" wide,

Digital electronics, Design 2:1 MUX with strobe input using NAND gates

Design 2:1 MUX with strobe input using NAND gates

Servo accelerometer, Servo accelerometer Electro-mechanical servo (forc...

Servo accelerometer Electro-mechanical servo (force balance) accelerometer uses an electromagnet to provide restoring force. The position of the seismic mass is measured by a p

Conceptual models, Can you describe an example of a conceptual model?

Can you describe an example of a conceptual model?

Fundamentals of financial management, 4-7 DuPont and Net Income Ebersoll Mi...

4-7 DuPont and Net Income Ebersoll Mining has $6 million in sales, its ROE is 12%, and its total assets turnover is 3.2x. The company is 50% equity financed, and it has no preferr

Servicing of chemical de-icing systems, SERVICING OF CHEMICAL DE-ICING SYST...

SERVICING OF CHEMICAL DE-ICING SYSTEMS: It is essential for the correct operation of the ice protection system that servicing is carried out on a regular basis.  The fluids use

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