The Effect of Disc Deterioration on the Performance of Ultra Low Volume Sprayer
The Effect of Disc Deterioration on the Performance of Ultra Low Volume Sprayer
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Date
1983-09
Authors
SULEIMAN, M. L.
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Abstract
A laboratory study was formulated to investigate the effect of
spinning disc deterioration (damage of disc teeth and surface
groove clogging) on the performance of ultra low volume sprayer.
To do this, artificial teeth damages of varying degrees of severity
were inflicted on three of five chosen identical spinning discs of
'Micron micro ulva' battery operated spinning disc ultra low volume
sprayer. The fourth disc has its surface grooves artificially blocked
and the fifth disc used as a control.
Droplet samples were obtained from each of the differently treated
discs and the control disc at random and measured using a particle
size analyser. The Volume median diameters (Vmds), Number median
diameters (Nmds), Dispersion- ratios (r), for each set of droplet
samples were obtained. Also power consumptions for each of the discs
when spraying were measured.
There was found to be significant changes in droplet spectra with
spinning disc deterioration, indicated by progressively higher values
of volume median diameters, which is suggested to be attributed to the
change of issuing points of droplets. There was, however, found to be
no significant change in average droplet sizes (Nmds), but droplets
were found to become less uniform with disc deterioration, indicated
by higher values of dispersion ratios! (r). Power consumption was
found to increase with disc damage, which would reflect on running
costs of the machine, a factor which the user should be aware of.
Description
Submitted in partial fullfilment of the requirements
for the M.Sc. Degree in Agricultural Engineering. September,1983.
Keywords
Disc Deterioration, Ultra, Low Volume, Sprayer