RU2648764C2 - Universal lancet paw - Google Patents

Abstract

FIELD: agriculture; machine building.

SUBSTANCE: invention relates to the field of agricultural engineering, in particular to the working organs of cultivators for continuous tillage. Surface of the wing of the universal lancet has a maximum angle of crumbling 24° at the beginning and minimum 16° at the end of the wing and deflected towards the front surface from the bottom of the furrow by an angle of no more than 1.4°.

EFFECT: such a constructive solution ensures a reduction in the energy intensity of the interaction of the universal lancet paw with the soil.

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Description

The present invention relates to the field of agricultural engineering, in particular to the working bodies of cultivators for continuous tillage.

The working bodies of cultivators are divided into cutting, combing, powdering, special-purpose organs. Undercutting working bodies include lancet ploskorezhayuschie and lancet universal paws. The angle of crushing of lancet flat-cutting legs α <16 °, the angle of crushing of lancet paws α> 16 °.

Technical solutions related to reducing the energy intensity of their interaction with soil can be attributed to a promising direction of modernization of lancet paws.

Thus, the work of a flat-cutting paw with a variable angle of crushing β contributes to a decrease in energy intensity, where the soil formation is deformed due to bending and torsion stresses [Svechnikov, P.G. Justification of the parameters of a plane-cutting paw with a variable cutting angle for deep loosening / P.G. Svechnikov // The dissertation ... of the candidate of technical sciences: 05.20.01. - Chelyabinsk, 1984, 225 p.]. The deviation of the wing blade of a plane-cutting paw from the bottom of the furrow also contributes to a decrease in energy intensity. [Pavlyuk, A.S. The working body of the plane cutter / A.S. Pavlyuk, Yu.A. Tsehmeystruk // Description of the invention to copyright certificate No. 1787338, IPC АВВ 35/22, publ. 01/15/93, bull. No. 2].

The prototype of the invention should be considered a universal lancet paw, stated in the textbook A.N. Karpenko and V.M. Khalansky [Karpenko, A.N. Agricultural machines / A.N. Karpenko, V.M. Khalansky. - M .: "Agropromizdat", 1989. - p. 54].

The disadvantages of the prototype include the lack of a variable angle of crumbling and the angle of deviation of the wing blade of the leg from the bottom of the furrow.

A known expression for determining the vertical power component of the angle of crumbling [Starovoitov, SI The horizontal component of the traction resistance of the lancet paw with a variable angle of crushing and with a transformed blade / S.I. Starovoitov // Bulletin of the Bryansk State Agricultural Academy, 2016, No. 1, p. 79-86.].

Equation (1) has a physical meaning if the following condition is met:

where ρ is the density of the deformable soil, kg / m ³ ;

g is the acceleration of gravity, m / s ² ;

h is the height corresponding to the height of the destruction of soil particles, m;

E - modulus of elasticity of the soil of the first kind, Pa;

G is the elastic modulus of the soil of the second kind, Pa;

z _p - the length of the deformable particles, m;

N is the thickness of the deformable soil formation, m;

α _p - coefficient for determining the axial moment of inertia of torsion-deformed rectangular formation;

β _p - coefficient for determining the moment of resistance of a solid rectangular section during torsion;

α ₁ - the angle of crumbling at the beginning of the wing of a lancet paw, rad .;

α ₂ - the angle of crumbling at the end of the wing of a lancet paw, rad.

We transform condition (2).

;

;

;

;

.

.

Thus, the crumbling angle at the beginning of the wing of the lancet paw [Starovoitov, S.I. On the angles of a universal lancet paw [Text] / S.I. Starovoitov, A.M. Grin, D.E. Lebedev // Bulletin of the Bryansk State Agricultural Academy, 2016. - No. 3 (55). - S. 76-82.].

Deviation of the surface of the wing of the leg towards the front surface from the bottom of the furrow

where β is the angle of deviation of the blade of the cutting edge of the wing surface from the bottom of the furrow, rad .;

L is the length of the blade paws, m;

ε _y is the elastic component of the relative compression strain,%.

An analysis of expressions (3) and (4) showed that at the maximum possible depth of the universal lancet paw and the upper threshold of physical ripeness of loamy soil, the crumbling angle at the beginning of the wing should not be more than 24 °, and the angle between the cutting edge of the surface and the bottom of the furrow should not more than 1.4 °.

The technical result is achieved by the fact that the wing surface of the universal lancet paw, having a maximum angle of crushing of 24 ° at the beginning and a minimum of 16 ° at the end of the wing, is deflected toward the front surface from the bottom of the furrow by an angle of not more than 1.4 °.

In the process, the cutting edge and the blade of the right, left wing work on crushing and stretching, and the wings of the paw directly on bending and torsion, which will lead to a decrease in the energy consumption of the universal lancet paws during soil cultivation.

The technical result of the design ensures the presence of distinctive features from the prototype, which meets the criterion of "novelty."

Claims (1)

A universal lancet paw, characterized in that the wing surface of a universal lancet paw, having a maximum angle of crushing of 24 ° at the beginning and a minimum of 16 ° at the end of the wing, is deviated towards the front surface from the bottom of the furrow by an angle of not more than 1.4 °.