TECHNICAL-TECHNOLOGICAL ASPECTS OF APPLYING NEW FORMS OF PLOUGHSHARE

Abstract

Istraživanje trošenja materijala lemeša različite izvedbe u oranju četverobrazdnim i peterobrazdnim plugom premetnjakom obavljeno je tijekom listopada i studenog 2001. godine na karbonatnom humogleju praškasto glinaste strukt ure. Brzina kretanja agregata u oranju bila je između 4,79 do 6,40 km/h, u prosjeku 5,58 km/h. Oranje je u prosjeku obavljeno na dubinu 25,5 cm. Lemeši su ukupno korišteni 309 sati. Ukupno su poorali 226 ha te je utrošeno 1,37 sati rada po ha. Svaki je lemeš poorao 22,6 ha. Ukupna masa svih lemeša prije istraživanja iznosila je 38625 g, a po završetku 30460 g. To je za 8165 g ili 21,13% manje od početne mase. Najviše su se istrošili lemeši oznake D1 i L1, koji su izgubili na masi 760 g, odnosno 930 g, ili 33,5%, odnosno 38,1%. Oni su nakon završenih testiranja postali neupotrebljivi za daljnji rad. Troškovi njihove uporabe iznose 10,06 kn/ha. Na lemešima oznake D2 i L2 nakon rada i gubitka 33,3% početne mase neupotrebljiv je postao vrh. Troškovi toga lemeša pri oranju su 5,83 kn/ha. Kod treće skupine lemeša, koju čine lemeši oznake D3, L3 i D4, L4, prosječni gubitak mase iznosio je 770 g ili 18,5%, a troškovi upotrebe iznose između 4,41 do 5,57 kn/ha. S njima se moglo i dalje nastaviti oranje. Na lemešima oznake D5 i L5, s gubitkom 27,1% početne mase, za daljnji rad je postao neupotrebljiv samo vrh lemeša. Njihovi troškovi su 3,03 kn/ha.Investigation of the various ploghshare materials wear on the five bottom plough was conducted in October and November, 2001. The ploughing was carried out on a carbonate humogley of powder clay texture. While working, the power unit work speed ranged from 4.9 km/h to 6.40 km/h, averaging 5.58 km/h. The ploughing was done at depth of 25.5 cm on the average. The ploughshares were used for 309 hours. The total of 226 ha were ploughed consuming 1.37 h/ha. Each ploughshare ploughed 22.6 ha. Total weight of all ploughshares amounted to 38625 g prior the investigation and 30460 g at its end. It is by 8165 g i.e. 21.13% less compared to the initial weight. The loss of 760 and 930 g i.e. 33.5 and 38.1% referred mostly to D1 and L1 respectively. After the investigation they became useless for further work. Their use costs amount to HRK 10.06/ha.Tip of the ploughsahres D2 and L2 were useless after their work resulted in 33.3% loss of the initial weight. The third group of the ploughshares including ploughsahres D3, L3, D4 and L4 was characterized by an average weight loss of 770 g i.e. 18.5% whereas use costs ranged from 4.41 to 5.57 HRK/ha. They were able for continued ploughing. Tip of the ploughsahers D5 and L5, known for the loss of 27.1% of the initial weight became useless for the further work. Their costs were 3.03 HRK/ha