RU2415541C2 - Pneumatic seeding apparatus - Google Patents

Abstract

FIELD: agriculture.

SUBSTANCE: seeding apparatus comprises a body with seed chamber, a vacuum chamber, a flat dropper of excess seeds and a sowing disc with lengthy radially arranged sucking holes. Sucking holes are made in the form of slots crossing generatrix surface of sowing disc. An inlet face is arranged on working surface of flat dropper of excess seeds at the side facing seed chamber. Lower edge of face is distanced from the centre of sowing disc at the distance that exceeds its radius. At the same time inlet face is arranged at the angle of not more than 20° to plane of tangent to generatrix surface of sowing disc and passing through crossing point of input face and forming surface of sowing disc.

EFFECT: invention increases quality of seeds dosing.

2 dwg

Description

The invention relates to agricultural machinery, in particular to machines for sowing seeds of agricultural crops.

Known pneumatic sowing apparatus, comprising a housing with a seed chamber, a vacuum chamber, a sowing disk installed between them with round suction holes and a dropper of excess seeds [1].

The disadvantage of this invention is the low quality of dosing of seeds.

The closest known solution to the proposed invention is a pneumatic sowing device, comprising a housing with a seed chamber, a vacuum chamber, a sowing disk between them with elongated radially located suction holes, and also a flat ejector of excess seeds [2].

The disadvantage of this invention is the technological complexity of the manufacture of suction holes, as well as low quality metering seeds.

An object of the present invention is to improve the quality of seed metering with a pneumatic metering device.

The problem is achieved in that in a pneumatic sowing device, comprising a housing with a seed chamber, a vacuum chamber, a flat ejector of extra seeds and a sowing disk with elongated radially arranged suction holes, the suction holes are made in the form of slots intersecting the forming surface of the sowing disk, and on the working of the surface of a flat ejector of excess seeds, from the side facing the seed chamber, an input face is made, the lower edge of which is removed from the center of the of the disc to a distance exceeding its radius. In this case, the input face is located at an angle of no more than 20 ° to the plane tangent to the generatrix of the seed disk and passing through the point of intersection of the input face and the generatrix of the seed disk.

The invention is illustrated by drawings.

Figure 1 shows a diagram of a pneumatic metering device; figure 2 - diagram of the relative position of the input face of the ejector of excess seeds and the forming surface of the sowing disk.

Pneumatic sowing apparatus (figure 1) includes a housing 1, in which a sowing disk 2 with radially arranged suction holes 3 of elongated shape is mounted and fixed on the drive shaft, and they are made in the form of slots intersecting the forming surface of the sowing disk 2, and therefore are open from the side facing her. The sowing disk 2 is adjacent to the seed chamber 4 located in the housing 1. On the other hand, a cover with a vacuum chamber 5 is adjacent to the sowing disk 2. At the outlet of the seed chamber 4 there is a flat ejector of excess seeds 6. On its working surface (figure 2) , from the side facing the seed chamber 4, an input face 7 is made, located at an angle ψ of not more than 20 ° to the plane tangent to the generatrix of the seed disk 2 and passing through the intersection of the input face 7 and the generatrix of the seed disk 2. Moreover, NJ edge A (2) input face 7 is removed from the center of the seed disk by a distance greater than its radius.

Pneumatic metering device operates as follows.

Seeds from the hopper enter the seed chamber 4, where under the action of the vacuum created in the vacuum chamber 5, they are captured by elongated radially located suction holes 3 of the sowing disk 2. The captured seeds are delivered to a flat ejector of excess seeds. Interacting with the input face 7, they are squeezed towards the center of the sowing disk 2, and the angle ψ≤20 ° of the installation of the input face 7 provides a soft, shockless effect on the seeds, since its value is obviously less than the angle of friction of the seeds of most crops against the surface of the input face 7 The final single-seed dosing is carried out by the protrusions of a flat ejector of excess seeds 6. With further rotation of the sowing disk 2, the seed remaining at the suction hole 3 moves into the zone, where the vacuum is cut off and it, under the action of gravity, falls into the furrow prepared by the opener (not shown).

Information sources

1. French patent No. 1535445, CL A01C 7/04, 1968.

2. USSR Copyright Certificate No. 1782398, cl. АСС 7/04, 1990 - prototype.

Claims (1)

Pneumatic sowing device, comprising a housing with a seed chamber, a vacuum chamber, a flat ejector of excess seeds and a sowing disk with elongated, radially located suction holes, characterized in that the suction holes are made in the form of slots intersecting the forming surface of the seed disk, and on the working surface of a flat of an excess seed ejector from the side facing the seed chamber, an input face is made, the lower edge of which is distant from the center of the seed disk an angle exceeding its radius, while the input face is located at an angle of no more than 20 ° to the plane tangent to the generatrix of the seed disk and passing through the intersection of the input face and the generatrix of the seed disk.

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