Studies on harvesting machines (16)

Analysis of ensilage cutter power requirements

Abstract

In this report 4 flywheel type ensilage cutter were studied. One has a 6″ feed roller length (6″ tyke), and the other 8″ type.
The amount of useful work and amouut of unnecessary work performed by the ensilage cutter is rather vague, and there is a possibility to improve our cutter.
we analysed the power requirements by means of electric power motter, rectifier and oscillograph. (Fig1) we had some results.
1) Feed mechanism do not regire excessive power. at the range of 600-900r.p.m of flywheel speed. Power requiement percentage of feed mechanism is 10-20%
2) Power requirement percentage of total horsepower due to cutting material, acceleratoin of material and the other work (contain unnecessary work) are 30-50%, 12-20% and 20-40%, respectively. (Tabe 3)
3) assuming a constant rate of material flow, power requirements for cutter, vary with the speed of knife travel is constant, power requirements vary with the feed rate.
4) Power requirements of cutting material vary with the shape of knife.
5) tower required to move air is proportional the total size of fan blade and the cube of fan speed.
6) Power requirement due to accelation of material are showed next formula.
Pa=0.1134×10^-4×Qv²
7) we can not get the result of true friction loss in the fan housiug.