Condition Monitoring of an Automotive Final Drive

This presentation discusses the process of condition monitoring of an automotive final drive. It covers the aims, objectives, methodology, resources, development of bench crest, vibration analysis, practical experimental analysis, recorded values, and outcomes. The presentation also includes recorded values for the first and second gear, and references for further reading.

CONDITION MONITORING OF AN
AUTOMOTIVE FINAL DRIVE

Outline
Aims
Objectives
Introduction
Methodology
Resources
Development of bench crest
Vibration analysis
Practical experimental analysis
 Recorded values
Outcomes

Aims
To develop a specific action condition
To develop a specific technique for condition
monitoring of an automotive final drive.
To locate wear debris with the help of
lubricating oil.
To find defective gear from equipments with
the help of sensors.
To rectify the problems with the help of a
technique for condition monitoring.

Objectives
To check if the two gear derives are meshed
with each other or not for avoiding the noise
produced during the time of vibration.
To check the active participation of sensory
actuation system.
The experiments would be repeated using
different values of temperature and speed, for
getting accurate outcomes in regular
intervals.

Introduction
Condition
monitoring is a
process which keeps
a machine alive
without any
stoppages.
Final drive unit
performs three vital
functions.
Decreases the speed
of propeller shaft for
rotating it smoothly
Figure 1: condition
monitoring system
(Source:ĐURIN,
2018, p. 123 )

Introduction
Along with the
movement there is
enhanced power,
vibration and noise.
These are main
things that are
considered during
the experiment.
Predictive
maintenance is
carried out using oil
lubrication.
Figure 2: condition
monitoring system
(Source: Farinha. 2018, p.
24)

Methodology
Obtaining smooth movement of gears with
the help of identified defective gear by the
vibration movement.
Vibration defects the gear and might provide
danger regarding mesh ups weariness
structure, uneven surface and many more.
Peak value is calculated, peak to peak value
depicts the maximum value.
Peak and peak to peak value is defined as
Vp= vpp2

Methodology
Using vibration
measurement by
fluke meter, peak
vale is calculated of
both the gears.
The defective gear
which produces
more noise and
vibration is found
out after receiving
the values.
Figure 3: fluke meter
(Source:
HarperCollins )

Resources
Sensory actuation
system and Vibrating
measurement
equipment are used as
resources.
With the help of
resources various values
are calculated.
Values are found out
with respect to
temperature and speed
of drive gear system.
Figure 4: digital actuator
(Source: leaklug 2017 )

Resources
Values are found out
with respect to
temperature and
speed of drive gear
system.
Various articles as
well as journals are
used for the
practice. Figure 5:
actuator
(Source:
Mohammadpour
2013)

Development of bench crest
Test bench has two
gears along with a
motor that rotates gears
with a shaft.
A rotating shaft is
placed between the two
gears and they are
covered with a mesh.
 Gear alignment with
the help of hypoid gear
is important for
minimizing noise.
Figure 6:
hypoid gear
(Source:
ĐURIN 2018)

Fluke meter
Fluke meter is used in
calculating peak value
and RMS of both the
gears.
The stud is pressed on
a gear and readings are
noted down.
Values received from
both the gears are
compared and defective
gear is found out.
Figure 7: fluke meter
with labeled parts
(Source:
HarperCollins)

Vibration analysis
Two gears are
placed at the same
height for rotating
the drives smoothly.
If it tightens the
level of two meshes
need to be adjusted.
Lubricating oil is put
inside to avoid
noises. Figure 8: vibration measuring
sensor
(Source: leaklug. 2017)

Vibration analysis
Peak and peak to peak
value is calculated in
order to measure the
vibration of gears.
Fluke meter is used for
vibration measurement.
Comparison of values
received from two gears
the defective gear is
found.
Maintenance activity is
carries out at last.
Figure 9: vibration analysis
and testing
(Source: Mohammadpour
2013)

Practical experimental analysis
First the mainline motor is switched on and
the speed of the motor is increases with
respect to time.
The gear rotates taking the help of shaft
along with the bearings in that.
In case of any noise or vibration, the machine
would recover the faulty gear with the help of
vibration analysis.
Vibration analysis is done by fluke meter.
Using sensory actuation system, amplitude
and speed of the gears is calculated.

Practical experimental analysis
In case of any
tightening in the
gear, the position is
rectified by placing
gear rigid and
straight.
The fluke meter is
mounted in one of the
gears and place it for
several some seconds.
Figure 10: condition monitoring
(Source: HarperCollins)

Practical experimental analysis
When it is released the
RPM value is increased
and peak value, root
means square value,
overall vibration and
temperature are received.
It is done separately for
both the gears.
Alternative changing
value is found, the gear
producing more vibration
is noted down. Figure 11: condition
monitoring system
(Source: Farinha 2018)

Recorded value for the first gear
RPM Peak value RMS Temperatu
re
Vibration
condition
4.6 0.02g 0 26.0 0.02
6.0 0.12g 0.01 24.3 0.02
8.0 0.19g 0.02 23.8 0.02
10.0 0.26g 0.04g 22.8 0.02

Recorded value for the second gear
RPM Peak value RMS Temperatu
re
Vibration
condition
4.6 0 0.00 24 0.02
6.0 0.21g 0.03 23.7 0.02
8.0 0.34g 0.04 22.3 0.02
10.0 0.40g 0.04 21.7 0.02

Results
Peal value changes between the increased
speed with respect to temperature and time.
The case of the first gear, temperature
decreases.
In case of gear two the temperature
increases with respect to time.
The values received from vibration depicts in
which conditions are the gears.
Before the experiment is carried out, the
maintenance activity is mandatory.

References
ĐURIN, B. (jan 2018). DIAGNOSTIC METHODS OF REAR
DRIVE AXLE OF THE PASSENGER CARS. International
Journal of Mechanical Engineering and Technology
(IJMET).
Farinha, J. M. (2018). asset maintenance and engineering
technology. crc press.
HarperCollins. (n.d.). Retrieved from
https://www.collinsdictionary.com/dictionary/english/final-
drive
leaklug. (2017 ). Leakylugnut.com. Retrieved from
http://leakylugnut.com/driveline/final-drives-and-differenti
als/
Mohammadpour, M. (2013). Transmission efficiency and
noise, vibration and harshness refinement of differential
hypoid gear pairs. institute of mechanical engineers.