RU142731U1 - ENERGY-SAVING ARROW Paw - Google Patents

Abstract

1. An energy-saving lancet paw, including a lancet share, a rack with a mouthpiece, characterized in that the lancet share is made in the form of a flat lancet knife, while a plate with a stand is mounted on top of it, to which a curvilinear shape is fixed. 2. The energy-saving lancet paw according to claim 1, characterized in that the narral extends vertically beyond the limits of the flat lancet knife, while the lower part of the narral is sharpened, and the upper part is connected to the rack by a hook.

Description

The technical field to which the utility model relates:

The utility model relates to agricultural engineering, namely to the working bodies of cultivators.

State of the art

A lancet paw is known, including a lancet share attached to a rigid strut. The angle of inclination of the blade to the horizontal plane, the angle of crushing α = 23 ... 30 °, the angle of opening of the blades γ = 60 ... 65 °, the working width b = 270, 330 mm. (Khalansky V.M., Gorbachev I.V. Agricultural machines. - M: KolosS, 2006, p. 73 ... 76).

The following should be noted as disadvantages: the lancet paw can only work stably at a depth of over 70 ... 80 mm. Due to the large angle of crumbling a, the soil is discarded, especially with an increase in the working speed of movement. This leads to the formation of an uneven surface, the area of evaporation of soil moisture increases. In this regard, the operating speed is limited, and therefore, productivity is reduced.

The closest in technical essence is the working body of the cultivator, containing a rack and mounted on it lancet share. The disk is mounted on an additional rack consisting of two parts interconnected by round plates with slots. (Patent RU 100695 "Working body of the cultivator" Publ. December 27, 2010 Bull. No. 36)

The main disadvantage is that after the passage of such a working body, moist soil is carried to the day surface, the bottom of the groove is exposed behind the lancet ploughshare. This exposes moist soil and leads to additional evaporation of soil moisture.

There is clogging of the stand with vegetation (plant debris and pruned weeds).

Disclosure of a utility model.

The technical result that can be achieved using the proposed utility model is to eliminate the removal of wet soil to the day surface, reduce energy costs, reduce clogging by vegetation, increase the levelness of the soil surface, productivity.

The technical result is achieved by the fact that the lancet ploughshare is made in the form of a flat lancet knife, while a plate with a rack is mounted on top of it, to which a curved-shaped narral is fixed.

The ram covers the vertical plane beyond the limits of a flat lancet knife, while the lower part of the narral is sharpened, and the upper part is connected to the rack by means of a hook.

Brief Description of the Drawings:

In FIG. 1 - energy-saving lancet paw, side view.

In FIG. 2 - energy-saving lancet paw, top view.

In FIG. 3 is a diagram of the interaction of the narralik with soil and plant debris.

Implementation of a utility model.

Energy-saving lancet paw includes lancet share made in the form of a flat lancet knife 1 (Fig. 1, 2). A rack 2 is mounted on it with a plate welded below 3. A flat lancet knife 1 is attached to the plate 3 with two bolts 4, 5. At the same time, the bolt 4 also attaches to the plate 3 a plate 6, which is welded to the baler 7. The upper part of the baler 7 fixed to the rack 2 by a hook 8. The ramp 7 of a curved shape is made of strip steel with a width of 30-40 mm and a thickness of 5-6 mm. Sheep 7 is exposed to a large impact of the soil, wears out, so it is sharpened several times, and then changed.

The ram 7 extends below the limits of the flat lancet knife of knife 1.

To exclude the unloading of vegetation and soil, the following condition must be met:

,

,

where δ is the angle of inclination of the lower part of the narralik to the soil surface, deg .;

φ _s , φ _p - friction angles of the narralik with vegetation and soil, deg.

When φ _c = 22 °; φ _p = 26 °; δ <90-48 <42 °.

You can take δ = 35 ... 40 °.

The height of the narrator h is determined from the equality of the kinetic and potential energy:

where V is the speed of movement of the tillage implement, m / s;

f is the coefficient of friction of soil with vegetation along the steel surface.

From here:

.At V = 2.5 m / s:

.

The traction resistance of a lancet paw, consisting of a ploughshare and a stand with a raiser, includes effort to cut and deform the soil layer, to overcome friction and to discard the soil:

,

,

where F _T - traction resistance, N;

k is the resistivity of the soil, N / m ² ;

b is the width of the paw, m;

l is the width of the face share, m;

t _with - the thickness of the rack with the mouth, m;

α is the angle of crumbling of the ploughshare legs, deg;

ε = 0.06 ... 0.08 - speed coefficient, (km / h) ^-1

t _l - ploughshare thickness, m;

h is the processing depth, cm; h ₀ = 6 cm;

φ is the angle of friction of the soil on the surface of the paws, degrees;

ρ is the volumetric mass of the soil, kg / m ³ ;

τ = 0.08 ... 0.10 - coefficient of depth of processing, cm ^-1 ;

V _P - operating speed of the unit, km / h; V ₀ = 6 km / h.

As can be seen from the formula, traction resistance depends on the parameters of the paw (t _l ; l; α; b; t _s ), the technological properties of the soil (k; φ), and operational indicators (V _P ).

When α = 0, cutting does not occur with a wedge, but with a knife with a blade thickness t _L. This significantly reduces traction resistance.

.

.

Energy-saving lancet paw works as follows:

In the process of moving the tillage implement, the flat lancet knife 1 is buried in the soil to a depth of 40-60 mm. In this case, the lower part of the narralik 7 cuts off the soil and moves it to the upper part of the narralik 7, from where the soil is discharged to a surface along a curved path. This eliminates clogging of the rack 2.

Flat lancet knife 1 cuts the root system of weeds.

The speed of the longitudinal movement of the cut soil layer along the edge of the plate share:

V _G = V · cosα

where V is the speed of the unit, m / s;

α is the angle of crushing of a flat lancet knife, deg.

For α = 0: V _Г = V.

Having a crumbling angle α = 0, no soil shift occurs, which provides a level surface that reduces the evaporation area of soil moisture. Do not expose the bottom with moist soil. Located below the lancet ploughshare, the narral cuts the soil in the zone of passage of bolts 4 and 5, which eliminates the hanging of soil and vegetation on them.

The proposed utility model in comparison with the prototype and other well-known technical solutions has the following advantages:

- a flat lancet knife is deepened by 40 ... 60 mm, eliminates the removal of moist soil to the day surface;

- due to the absence of a crumbling angle, traction resistance is significantly reduced;

- the presence of a curved narrator allows you to work at higher speeds, thereby increasing the productivity of tillage tools, vegetation freezes;

- the soil does not shift to the sides, the wet bottom is not exposed, the surface area does not increase, its flatness is ensured.

Claims (2)

1. An energy-saving lancet paw, including a lancet share, a rack with a mouthpiece, characterized in that the lancet share is made in the form of a flat lancet knife, while a plate with a rack is mounted on top of it, to which a curved-shaped narral is fixed. 2. Energy-saving lancet paw according to claim 1, characterized in that the narral extends vertically beyond the limits of the flat lancet knife, while the lower part of the narral is sharpened, and the upper part is connected to the rack by a hook.

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