EFG
. .
CTC-201-288-00
EFFECTIVITY
. .
.
.
ALL CFM56-5B ENGINES FOR A319-A320-A321
CFMI PROPRIETARY INFORMATION
.
. .
.
79-21-10 Page 11
ENGINE SYSTEMS Jan 03
EFG LUBRICATION UNIT CFM56-5B TRAINING MANUAL
Pump design principle.
The five pumps are positive displacement pumps, powered by a single shaft.
Their design consists of two rotor gears rotating in an eccentric ring.
The outer gear (driven gear) has one tooth more than the inner gear (driver gear). The gears rotate in the same direction, but with different angular speeds.
The volume corresponding to the missing tooth is, therefore, displaced from the inlet to the outlet.
Since the two gears rotational axes are offset, the area between two teeth profiles increases up to a maximum volume during half a turn.
During this first half cycle, the increased volume creates a vacuum and pumps in the oil from the inlet orifice.
During the second half cycle, the volume decreases between the teeth, causing the oil to be discharged through the outlet port.
EFFECTIVITY ALL CFM56-5B ENGINES FOR A319-A320-A321 CFMI PROPRIETARY INFORMATION 79-21-10 ENGINE SYSTEMS Page 12 Jan 03
EFG
. . . .
. . . . . .
. . . . .
CTC-201-192-00
EFFECTIVITY
79-21-10 Page 13
ALL CFM56-5B ENGINES FOR A319-A320-A321
ENGINE SYSTEMS Jan 03
CFMI PROPRIETARY INFORMATION
CFM56-5B TRAINING MANUAL
EFG
LUBRICATION UNIT
Lube unit internal lubrication.
Internally, the lube unit is lubricated with supply pump outlet oil, which flows within the drive shaft of the unit.
The oil flow lubricates the external splines of the shaft aft end, via two calibrated holes, and then circulates towards the AGB.
The AGB mounting pad has no carbon seal.
The lube unit has an O-ring for sealing purposes.
EFG
. .
.
.
CTC-201-194-02
EFFECTIVITY
79-21-10 Page 15
ALL CFM56-5B ENGINES FOR A319-A320-A321
ENGINE SYSTEMS Jan 03
CFMI PROPRIETARY INFORMATION
CFM56-5B TRAINING MANUAL
EFG
THIS PAGE INTENTIONALLY LEFT BLANK
EFG
MASTER CHIP DETECTOR
EFFECTIVITY
79-21-50 Page 1
ALL CFM56-5B ENGINES FOR A319-A320-A321
ENGINE SYSTEMS Jan 03
CFMI PROPRIETARY INFORMATION
CFM56-5B TRAINING MANUAL
EFG
MASTER CHIP DETECTOR
The Master Chip Detector (MCD) collects magnetic particles suspended in the oil that flows from the common outlet of the four scavenge pumps.
It is installed on the lubrication unit and is connected to an oil contamination pop-out indicator, through the DPM wiring harness.
中国航空网 www.aero.cn
航空翻译 www.aviation.cn
本文链接地址：TRAINING MANUAL CFM56-5B ENGINE SYSTEMS 培训手册 CFM56-5B 发动机系统(78)
