SU978744A1 - Cylindrical plough - Google Patents

Description

The invention relates to agricultural machinery, in particular to plows for tillage. A cylindrical plow is known, including a hollow cylinder mounted on a frame with a cutting edge, fixed to a shaft by means of knitting needles 1. However, the cutting edge of this plow is set at an angle to the direction of movement, which helps reduce the width of the plow and reduces its productivity. A cylindrical plow is known that includes a frame and a hollow cylinder attached to it with C2 teeth. The disadvantage of the known plow is that the serrated edge of the cylinder does not reduce the drag of the plow, and the presence of the cylinder drive complicates the design of the device. The purpose of the invention is to reduce traction resistance and increase the productivity of the plow. For this, the teeth are made asymmetrical, and the axis of rotation of the cylinder is parallel to the direction of plow movement, while the short edge of the asymmetric tooth is positioned towards the cylinder under yalom 30 .. and forms an angle of 0 * 50 ° with the long edge. Fig, 1 shows a cylindrical plow, side view; in fig. 2 the same, top view; in fig. 3 diagram of the forces acting on the tooth (Z - symmetrical, 36, in - asymmetric). The cylindrical plow includes a frame 1 with support wheels 2 and a bearing housing C fixed on it by means of a base plate 3 with an axis 5 and spokes 6 a hollow cylinder 7 with interchangeable asymmetrical teeth 8, the latter have a long 9 and a short 10 edges, while the short edge of a 10 8 is located to the generator 11 of the cylinder 7 at an angle () 30.,. П ° and forms an angle (dL) with a long 9 - 40 ... 50

The plow works as follows.

When the cylinder is buried in the soil to a depth set by the support wheel 2, the side reaction of the soil leads to the asymmetrical teeth, which performs the rotation of the cylinder. The cut soil layer enters the cylinder, turns around for its rotation and leaves the cylinder on the opposite side.

Depending on the parameters of the asymmetric teeth, the ratio of the translational velocity of the cylinder to the circumferential should vary in the range of 1.0-1.5, which is a necessary condition for the formation of a turn by a ring of a cylinder. However, depending on: the tooth profile (symmetrical or asymmetrical), the soil reaction will be able to. to displace the zu.ba movement with or without the base shift.

In the case of an asymmetrical knife (FIG. Za), the projection of the normal force on the right blade of the knife R | sj is equal and opposite to the force ..R acting on the left blade of the knife / If these forces are equal, the ZuNa movement in the soil along its axis of symmetry without lateral displacement,

In the case of an asymmetric tooth, the left side of which is directed parallel to the generator of the working body cylinder, and the right is located at an angle b12 to it (Fig. 36), the reaction R | J will cause the tooth to move to the other side and, therefore, rotate the cylinder. .

The magnitude of the side reaction to the edge of the tooth (fIg. Sv) RN will be defined as .s {n i2C05oi2 where P is the resistance of the soil to the movement of the LOOM of the tooth. The maximum absolute value of the product s I n ct / fcosotj takes place at an angle about {,. When the angle deviates by ± 5 from this product, 6 changes only slightly (in the range of 1.5), therefore the optimal angle of the long edge of the tooth to the generator of the cylinder is 0-50. This is true when the tooth moves only in the longitudinal direction,

Due to the fact that the forward movement of a tooth occurs with its simultaneous deviation from the direction of movement to the left, it is necessary to consider the action of forces not relative to the generator cylinder, but relative to the direction of the transference movement of the tooth,

The optimal mode of operation should require a short edge of the tooth, so that it coincides with the portable direction of movement of the tooth (Fig. L). Angle d can be determined based on the ratio of the circumferential UrcIl translational / Scr. Of the cylinder velocities necessary for the execution of the technological process,,.

V In this case ...

fast

V,

fast

For relationship

1-13 angle cL-t soc

tag et. In conjunction with TeMj, what is spent per turn of the reservoir is energy.

fast

gi, optimal value is ok

The pressure is 1.2-1.5 and therefore the optimal angles ct will be equal. The installation angle of the long cutting edge to the mold (whose cylinder must be equal to the sum of the angles is 60-80

The orientation of the plow from several working bodies to ensure the stability of the plow in the horizontal plane is necessary to ensure for each odd cylinder the direction of rotation in one direction and for the even one in the other, for which it is necessary that the teeth of the odd cylinders have right asymmetry and even . The stability of the plow in the horizontal plane is achieved provided that an odd number of cylinders of at least 5

The use of the invention significantly reduces the cost of mechanical energy for plowing.

The invention reduces the resistivity of a cylindrical plow. 35-50% compared with the dumping dump, provides the maximum width of the cylindrical ring.

Claims (2)

Invention Formula 1, A cylindrical plow including a frame and a hollow cylinder fixed on it with teeth, characterized in that, in order to reduce traction resistance and increase the performance of the plow, the tooth is made asymmetric and the axis of rotation of the cylinder is parallel to the direction of plow movement. 2. The plow according to claim 1, characterized in that the short edge of the asymmetric tooth is angled to the cylinder generator and forms an angle of 0-50 ° with the long edge of the tooth, Information sources taken into account during the examination T. Patent CUJA If 3080932, cl. 172-557, 1E63. 2, USSR author's certificate V 80801, cl. And 01 V.17 / 00, 1976 (prototype),