RU-2861733-C2 - WORKING ELEMENT OF CENTRIFUGAL FERTILISER SPREADER

RU2861733C2RU 2861733 C2RU2861733 C2RU 2861733C2RU-2861733-C2

Abstract

FIELD: agriculture. SUBSTANCE: working element of a centrifugal fertiliser spreader includes a shaft, a disc and a guide cone. The disc has the shape of a truncated cone stamped from sheet metal with a flat bottom at the apex, a mounting hole in the centre of the bottom. On the generatrix surface of the disc, radial grooves with a wave-shaped cross-section expanding towards the periphery and with outward convexities are made by stamping. The depth of the grooves increases from 0 mm at the flat bottom to alternating values of 20 mm, 35 mm, 50 mm, 65 mm for different grooves at the periphery of the disc. EFFECT: uniformity of fertiliser distribution. 1 cl, 3 dwg

Inventors

KUZNETSOV VLADIMIR VASILEVICH
Adylin Ivan Petrovich
Kharchenko Denis Nikolaevich
Lapteva Natalya Alekseevna

Dates

Publication Date: 20260508
Application Date: 20241008

Claims (1)

A working element of a centrifugal fertilizer spreader, including a shaft, a disk and a guide cone, characterized in that the disk has the form of a truncated cone stamped from sheet metal with a flat bottom at the apex, a mounting hole in the center of the bottom, and on the generating surface of the disk, radial wavy cross-sections are made by stamping, expanding towards the periphery of the trough with bulges outward, the depth of the troughs increases from 0 mm at the flat bottom to alternating values of 20 mm, 35 mm, 50 mm, 65 mm at different troughs on the periphery of the disk.

Description

The invention relates to agricultural engineering, in particular to devices for spreading mineral granular fertilizers over the soil surface. One of the ways to increase the flight range and improve the uniformity of distribution of scattered fertilizer particles over the soil surface is to provide different angles of their descent from the spreading working element in the vertical plane to form different dispersion zones. A well-known centrifugal distributing working element RU-7000-01 manufactured by OJSC Bobruiskagromash [Catalogue of spare parts for the RU-7000 mineral fertilizer distributor. [Electronic resource]. - Access mode: arston.by>wp-content/uploads/2013/10/ru-7000.pdf], includes a flat disk with blades made in the form of a pentagonal part of a hollow truncated polyhedral pyramid, expanding towards the periphery of the disk. Each of the three working faces of the blade ensures the descent of the portion of fertilizer passing along it at its own angle to the horizon, forming three dispersion zones, which increases the flight range of particles and improves the uniformity of their distribution over the soil surface in comparison with the previous analogue. The disadvantage of this design is the complexity of manufacture and insufficient uniformity of distribution of fertilizer particles over the soil surface due to the small number of dispersion zones formed and the uneven change in the angle of descent of particle flows from the working surfaces in the vertical plane. Also known are designs of scattering working bodies [RU patent No. 205806, IPC class A01C 17/00, A01C 15/04, A01C 15/00, 2021], [RU patent No. 207538, IPC class A01C 15/00, 2021], [RU patent No. 207184, IPC class A01C 7/00, A01C 17/00, 2021]. The common disadvantage of the above designs is their complexity, high manufacturing costs and the need for adjustment during operation. The closest analogue to the claimed one, selected as a prototype, is the working element of a centrifugal fertilizer spreader [RU patent No. 198532, IPC class A01C 17/00, 2020], including a shaft, a guide cone, a disk and blades, characterized in that the blades are triangular, corrugated plates of a wave-shaped cross-section, vertically mounted to the plane of the disk, with a right angle at the periphery of the disk, with corrugations adjacent at one end to the plane of the disk and located at different angles - 0 ... 45 ° to it, with a wavelength of the cross-section smoothly increasing from the center of the disk to the periphery. A disadvantage of the prototype is its high manufacturing cost. In addition to the disk itself, complex blades must be manufactured and welded, requiring turning, drilling, cutting, pressing, and welding operations. The technical result of the invention is to ensure uniform distribution of fertilizers. The technical result is achieved due to the fact that the disk has the shape of a truncated cone stamped from sheet metal with a flat bottom at the apex, a mounting hole in the center of the bottom, and on the generating surface of the disk, radial wavy cross-sections are made by stamping, expanding towards the periphery of the groove with bulges outward, the depth of the grooves increases from 0 mm at the flat bottom to alternating values of 20 mm, 35 mm, 50 mm, 65 mm at different grooves on the periphery of the disk. Thus, it is the combination of features of the invention that distinguishes it from the prototype that ensures uniform distribution of fertilizers. Consequently, the distinctive features of the invention, in comparison with the prototype, meet the criterion of “significant differences”. Since the set of distinctive features of the invention is not found in other technical solutions, it meets the criterion of “novelty”. The invention is explained by drawings, where Fig. 1 shows a diagram of the working element of a centrifugal fertilizer spreader, a top view, Fig. 2 is the same side view with a section A - A in Fig. 1, Fig. 3 is a section B - B in Fig. 2. The working element of the centrifugal fertilizer spreader includes a shaft 1, a disk 7 and a guide cone 3, wherein the disk has the shape of a truncated cone stamped from sheet metal with a flat bottom 4 at the apex, a mounting hole 5 in the center of the bottom, and on the generating surface 2 of the disk, radial wavy cross-sections are made by stamping, expanding towards the periphery of the trough 6 with bulges outward, the depth of the troughs increases, Fig. 3, from 0 mm at the flat bottom to alternating values of 20 mm, 35 mm, 50 mm, 65 mm at different troughs on the periphery of the disk. The working element of the centrifugal fertilizer spreader operates as follows. The flow of fertilizers coming from above from the dosing device (not shown) falls at an obtuse angle onto the guide cone 3, acquires a rotational motion, is dispersed over the surface of the cone and is directed into the grooves 6 of the disk 7. Moving under the action of centrifugal force alo