Resource information
Mowing of grasses and bush vegetation appear one of the most important technological operations while exploitation the roads, dams and ameliorative channels. For such activity agricultural or ameliorative multi-rotor mowers with joint knives are used. Multi-rotor mowers are characterized with high productivity and reliability along with complete cutting ability. Parameters of cutting devices are analyzed according the peculiarities of reclaimed land (among the peculiarities there are outlined unevenness and inclination of the relief). Besides, bushes in reclaimed lands are usually having thick stalks hard to cut. Therefore, ameliorative mower requires not only high speed of cutting knives, but also high energy of knives' stroke, allow cutting thick stalks under the roots. Theoretical and experimental research on the substantiation of geometric parameters of the knife cutting edge in a rotary mower while cutting bush vegetation on reclaimed lands is presented. The scheme of cutting device of multi-rotor mower is shown; the shape of cutting knife and variances of sharpening of cutting edges is displayed. Forces, directed on cutting edge of knife, are presented on the scheme. The process of cutting with the help of knives with up-and-down sharpening is shown. Experimental device is displayed. It is shown that the rational parameters of a knife can be either upper or two-side sharpener of cutting edge, the sharpening angle of which is about 20-25 degrees.
