Effect of rake angle and cutting speed on energy demands of mulcher with vertical axis of rotation
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Kuupäev
2017
Kättesaadav alates
Autorid
Čedík, J.
Pexa, M.
Pražan, R.
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Abstrakt
The contribution deals with the reduction of agriculture energy demands. For
maintenance and treatment of permanent grassland areas, areas left fallow and put to rest the
mulching in combination with other workflows (mowing, grazing) is advantageous procedure.
As conventional impact grass cutting and chopping is energy demanding procedure, it is proper
to reduce the energy demands of such device. In the paper the effect of shape of cutting tool,
particularly the rake angle, on energy demands of mulcher with vertical axis of rotation is studied.
The effect of cutting speed on energy demands is also verified. The measurement was performed
using mulcher MZ 6000 made by Bednar FMT Ltd. with working width of 6 m and three rotors.
During the measurement the test rides using the cutting tools with different rake angle and cutting
speeds of 105m s-1
, 89 m s-1
and 79 m s-1 were performed. The rake angle of cutting tools were
chosen 0°, 15° and 25°. The test area was pasture with permanent grassland. During the
measurement the torque and power, transferred through PTO to the machine, fuel consumption
and GPS coordinates were measured. From each test ride the samples of grass matter were taken
in order to determine the yield and moisture content. It was found that increase of the rake angle
up to 25° and decrease of the cutting speed resulted in decrease of the power requirement of the
mulcher.
Kirjeldus
Article
Märksõnad
mulcher, permanent grassland, energy demands, cutting tool, rake angle, cutting speed, articles