Ph.D. S. Nurushev

Kostanai state University A.Baitursynov .

Working body milling form justification.

The most significant drawback of milling of soil cultivation tools is the high energy consumption and low productivity . One of the elements that determine their power capacity and productivity is the form of active working body ( blade) , because it affects the way to the formation of soil cuttings of a certain size .

KGU named after A.Baitusynov conducted research in order to justify the form of T-shaped experimental blade, which have right and left side folds on one leg , and perform the functions of both right -hand and left-hand serial Г-shaped blades mounted separately on the disc milling cutter drum.

When separating the two serial blades supply half hour right blade passes through the already preliminarily clipped by leg left-hand blade (picture). It turns out that half of the supply portion AKE cut twice . In view of the different sharps left and right leg conditions for subsequent blade is not made easier, because leg working in a continuous medium with considerable friction.

Total cut surface can be determined :

F =F_shear + F_friction + F_bend=2h(S+δ b_H)

δ - Coefficient taking into account the difference between the milling depth and length cycloid site. According to Sonne, Ɛ = 2.

h - Depth of processing

b_H - Width of the working body.

S - Submission on the blade.

The disadvantage is eliminated by using a T-shaped blade having a right -hand and left folds on one leg , for whom the square cut:

F = F_leg +F_shear=h(S+2 δ b_H)

Scheme of formation of soil chips

Consequently , the surface cutting and thus the energy consumption will be reduced by reducing the area of the shear of blade leg .

Taking the ratio of expressions using the formulas (I) and (2) and preformed it, we obtain :

Analyzing this relationship , we can conclude that cutting surface , and hence the energy intensity of the milling process can be reduced by increasing the permissible limits agricultural needs by ratio S/ b_H and by reducing the area of the shear of blade leg , which is confirmed by experimental studies . Thus, data of comparative tests show a reduction of specific energy consumption milling soil I, I - !, 2 times experimental working bodies compared with serial.