RU2233060C2 - Pneumatic feed - Google Patents

Abstract

FIELD: agricultural engineering; seeding mechanisms.

SUBSTANCE: proposed pneumatic feed has vacuum chamber and seed box. Seeding disk with cover plate provided with suction holes is placed between vacuum chamber and seed box. Projections in form of triangular pyramid are made at each hole. One face of pyramid lies in plane of cover plate surface. Other face with suction hole is working one and is pointed in direction of disk rotation. Angle of face tilting to plane of disk is at least 10% less than angle of seed friction against material of which projection is made. Working face rib being base of face is directed radially to center of disk rotation. Axis of suction hole in cover plate and in projection is square to plane of working face of projection.

EFFECT: improved quality of one-by-one delivery of seeds.

2 dwg

Description

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

Known pneumatic sowing apparatus / 1 /, comprising a hopper, a seed chamber, a vacuum chamber and mounted between the bodies of these chambers sowing disk located on its end surface of the pad with holes for sucking seeds. Moreover, in the area of each hole, the overlay is provided with protrusions, and a groove is made in the base of the housing of the seed chamber for the passage of these protrusions.

The disadvantage of this pneumatic sowing device is the insufficiently active quality of seed tedding, since the protrusions only grow seeds adjacent to the sowing disk, and the seeds that are sucked to the hole are grown only by rubbing against the ends of the protrusions and the activated seed layer. Ultimately, this affects the quality of the pneumatic metering device.

The closest technical solution is a pneumatic metering device / 2 / containing a hopper, a seed chamber, a vacuum chamber and a metering disk mounted between the chambers with a pad located on its end surface with holes for sucking the seeds, and in the area of each hole, protrusions formed by two located at an angle to each other by planes.

The disadvantage of this invention is the need for careful calibration of the seeds, as well as the insufficient quality of the discharge of excess seeds, and accordingly the low quality of the pneumatic sowing device.

An object of the present invention is to improve the quality of a single piece seed delivery.

The task is achieved in that each protrusion is made in the form of a triangular pyramid, one face of which lies in the plane of the surface of the lining, and one working face, with a suction hole, is turned in the direction of rotation of the seed disk, and the angle of inclination to the plane of the seed disk is not less than 10% less than the angle of friction of the seeds on the material of which the protrusion is made, while the rib, which is the base of the working face, is directed radially to the center of rotation of the seed disk, and the axis of the suction hole in the pad and you Toope perpendicular to the head face plane of projection.

Figure 1 shows a pneumatic sowing apparatus, General view; figure 2 is a section aa in figure 1.

The pneumatic metering device includes a hopper 1 connected to the housing 2, in which the seed chamber 3 is made. In the housing 2, the metering disk 5 is mounted and fixed on the drive shaft 4 with the pad 6 on its end surface facing the seed chamber. On the overlay made protrusions 7 in the form of a triangular pyramid. One face of each pyramid lies in the plane of the lining 6, and one, with a suction hole, is turned in the direction of its rotation, and the angle of its inclination to the plane of the sowing disk is not less than 10% less than the angle of friction of the seeds on the material of which the protrusion is made. On the other side of the sowing disk 5 there is a vacuum chamber 8. In the housing 2 above the seed chamber 3 there is a ejector of excess seeds 9, made in the form of a brush.

Pneumatic metering device operates as follows.

Seeds from the hopper 1 enter the seed chamber 3. When the sowing disk 5 is rotated, the seeds are squeezed with faces with the suction holes of the protrusions 7, at the same time a vacuum is created in the vacuum chamber 8, due to which the seeds are captured by the suction holes. The installation angle of the face with the suction hole of the protrusion 7 to the plane of the sowing disk 5, smaller than the angle of friction of the seeds on the material of which the protrusion 7 is made, helps to prevent the capture of a large number of excess seeds. Further, the disk transports the seeds to the zone of action of the dropper of excess seeds 9, and then to the discharge zone, where the vacuum is closed, and the seeds fall under the influence of gravity into the furrow.

Sources of information

1. USSR copyright certificate No. 738536, cl. A 01 C 7/04, 1978.

2. Copyright certificate of the USSR No. 1183012, cl. A 01 C 7/04, 1983.

Claims (1)

A pneumatic metering device comprising a hopper, a seed chamber, a vacuum chamber and a metering disk mounted between the chambers with an overlay with holes for sucking the seeds located on its end surface, with protrusions located in the area of each hole, characterized in that each protrusion is made in the shape of a triangular pyramid , one face of which lies in the plane of the lining, and one face, with a suction hole, is turned in the direction of rotation of the seed disk, and the angle of its inclination to the plane of the seed disk not less than 10% less than the angle of friction of the seeds on the material of which the protrusion is made, while the rib, which is the base of the working face, is directed radially to the center of rotation of the seed disk, and the axis of the suction hole in the patch and protrusion is perpendicular to the plane of the working face of the protrusion.

Images