SU917745A1 - Pneumatic sowing apparatus - Google Patents

Description

, ...; |, -. The invention relates to agricultural machinery, 8 particularly to pneumatic sowing machines, which can be used on sowing units, operating at elevated speeds.

Pneumatic metering devices are known, containing a rotating hollow citrated die drum equipped with vacuum and overpressure chambers with a series of holes on its surface 1J.

A disadvantage of the known sowing apparatuses is that the increase in the speed of the sowing drum does not deprive the seizure of all the answers | K: those of the last seed, especially those with larger dimensions and weight, which leads to missed sowing and a decrease in yield.

The purpose of the invention is provided by "; e capture all the holes of the drum of various sizes and weight of seeds i

with increased frequency of rotation of the seeding drum.

This is achieved by installing a spring-loaded cylindrical roller made of an elastic material with a mechanism for adjusting its position in a direction radial to the drum in the capture zone by the seed holes of the drum.

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FIG. 1 shows a pneumatic apparatus, side view; in fig. 2 shows section A-A in FIG. one.

Pneumatic metering device contains a hopper 1, open with one

Claims (2)

An end-side IS rotating sowing hollow drum 2, with holes 3 for grabbing seeds. Inside the drum 2 sequentially in the direction of rotation there is a block of chambers rarely 20 k and an overpressure 5. The open side of the chamber adjoins the inner surface of the cylindrical part of the drum and covers up to 1/3 of this surface. In the seizure zone of the seed drum holes, i.e. in the area of contact between the outer surface of the cylindrical part of the drum and the seeds coming from the bunker, on a spring-loaded leash 6 it is strengthened with the possibility of adjusting the distance to the surface of the drum with the aid of a stop 7. A cylindrical roller 8 made of elastic material. The drive of the drum and the cylindrical body is selected so that the circumferential speed of the surfaces of the drum and roller 8 at the point of convergence is identical in magnitude and direction. A comb 9 is placed above the drum, removing excess suction seeds. A cylindrical body 10 and a receiving opening of the pneumatic wire 11 are placed near the surface of the drum, in the zone of the overpressure chamber. The receiving opening of the pneumatic conduit is fenced with elastic shutters 12 and 13, preventing air leakage from the pneumatic conduit. Works pneumatic sowing machine as follows. In the process of operation, incoming seeds are trapped between roller 8 and drum. 2. The speed of the pinched seeds is identical with the speed of the drum surface, so all the seeds located against the suction holes are picked up with suction holes 3 and the rest is carried up and rolled over roller 8 and returned to the seed intake zone from the hopper. As the seeding drum rotates, the seeds captured by the openings 3 move to the comb, which removes the excess seeds, leaving only one suction device. As long as the holes 3 of the drum move over the rarefaction chamber 4, the trapped seeds are held by them. But as soon as the holes 5 begin to approach the chamber of overpressure b-ni 5, the cylindrical body 10 acts on the grain, pressing it against the suction hole. Further rotation of the drum ensures the transfer of seeds to the receiving opening of the pneumatic conduit and releases it from the pressure of the pressing body 10. Under the pressure of air from the overpressure chamber 3, the seeds detach from the opening 3 and enter the pneumatic conduit 11. The air flow ejecting the seeds from the holes 3. cleans them this eliminates their clogging. Forced filling of suction devices eliminates possible. There are no gaps in the supply of seeds at a supply frequency of up to 25 pieces per second, and the forced supply of seeds to pneumatic conductors reduces the possibility of redistributing them during transportation. This ensures the operation of the seed truck at a speed of up to I km / h. Claims of the invention: A pneumatic seeding machine containing a rotating hollow cylindrical drum equipped with dilution and overpressure chambers with rows of holes on its surface, so as to ensure that all the holes of the seed with different sizes and weights of the seeds are gripped when elevated the frequency of rotation of the drum seeding; in the zone of the seizure of the seeds by the holes of the drum, a cylindrical roller of elastic material with a mechanism m adjusting its position in the radial direction of the drum. Information sources. taken into account in the examination 1. US Patent If 29В6305, cl. 221-211, 1961 (prototype). oooo ooojo  9o f 0 (fQ O 0-OoOJ f J f. at YATCHG. f X t f f f  /