SU923416A1 - Working member for spreading mineral fertilizers - Google Patents

Description

The invention relates to agricultural machinery, namely to centrifugal spreaders of mineral fertilizers or other bulk materials.

Known working body of a centrifugal spreader, in which the inner surface is formed by rotation of a second-order curve and has blades fixed to it [1].

The disadvantage of this device is that the inevitable is the intersection of the flight paths of the fertilizer particles descending from the central and peripheral parts of the working body, which reduces the uniformity and width of the fertilizer sifting on the soil surface.

The closest in technical essence to the proposed one is a working body, including a rotating disk with groups of blades of various lengths fixed on it, which are located symmetrically relative to the vertical axis [21.

The disadvantage of this working body is that it does not provide a large sifting width of fertilizers due to the fact that the disk is made flat. In addition, the disk does not provide a high uniformity of fertilizer sifting, since part of the fertilizer is transferred from short to long blades.

The purpose of the invention is to increase the sieving width of mineral fertilizers and increase the uniformity of their distribution on the soil surface.

This goal is achieved by the fact that the working surface of the disk is concave spherical in shape, while the outer edge of the disk has spiral cuts in the area of each group of blades, and the blades θ of each group are installed with a step decreasing in the direction of rotation: the disk.

the increase in the angle of inclination of the ends of the long blades to the horizon ensures an increase in the width of the sieving zone of mineral fertilizers, i.e. the width of the working body. The step of their placement on the disk, which increases with elongation of the blades, ensures uniform distribution of fertilizers over the entire sifting width.

The application of the invention will provide, by increasing the uniformity of sieving of fertilizers and increasing the width of the sieving strip, reducing the consumption of fertilizers and increasing the yield of crops.

Claims (2)

The invention relates to agricultural machinery, namely centrifugal fertilizer spreaders or other bulk materials. A working member of the centrifugal spreader is known, in which the inner surface is formed by rotating the second-order curve and has blades 11 fixed on it. The disadvantage of the device is that the intersection of the flight paths of fertilizer particles converging from the central and peripheral parts of the working body is inevitable, which leads to a decrease in the uniformity and width of the fertilizer sifting over the soil surface. The closest in technical essence to the present invention is a working body, including a rotating disk, fixed to it by groups of blades of various lengths, which are located symmetrically relative to the vertical axis 21. The disadvantage of this working body is that it does not provide a large width of fertilizer sowing that the disk is made flat. In addition, the disc does not provide a high uniformity of the sowing of fertilizers, as part of the fertilizer is transferred from short blades to long ones. The purpose of the invention is to increase the sieving width of mineral fertilizers and increase the uniformity of their distribution over the soil surface. This goal is achieved by the fact that the working surface of the disk is made of a concave spherical shape, and the outer edge of the disk has spiral-shaped notches in the zone of each group of blades; we will take the blades 8 of each group installed in steps decreasing in the direction of rotation of the disk. 39 Such an embodiment of the device provides the maximum working width, the possibility of uniform distribution of fertilizers spread by the blades of different lengths on it. FIG. 1 shows the proposed working body, top view, in FIG. 2, section A-A in FIG. 1, The working member consists of a rotating disk 1 with groups of blades 2, 3 and t of different length fixed on it. Blades of equal length are placed symmetrically with respect to the axis of rotation of the disk. This ensures dynamic balancing of the working device. The working surface 5 of the disk 1 is made concave spherical shape. The outer edge of the disk 1 has spiral-shaped notches 6 in the zone of each group of blades 2-. The tires in each group are set in increments that decrease in the direction of rotation of the disk. The device works as follows. Fertilizers supplied by the metering device to the rotating disc 1, the paddles 2, 3 and A are directed to the surface of the field. The blades of different lengths of fertilizer descend at different heights, at different angles of inclination to the horizon, and different speeds. Due to this, fertilizer streams, gathering and {them from different blades, do not affect either one another during the flight. Due to this fertilizer, on the surface, the floors are placed in sectors according to the number of blades in groups. The methanei sectors overlap each other with their boundary areas, thereby ensuring uniform distribution of mineral fertilizers across the entire width of the sowing zone. Increasing the angle of inclination to the horizon of the ends of the long blades provides an increase in the width of the sieving zone of mineral fertilizers, i.e. width of the working body. The pitch of their placement on the disc, which increases as the blades become longer, ensures that the fertilizers are evenly distributed over the entire sieving width. The application of the invention will ensure, by increasing the uniformity of the sowing of fertilizers and increasing the width of the sowing strip, a reduction in the consumption of fertilizers and an increase in the yield of agricultural crops. Claims of the invention A working body for dispersing mineral fertilizers, including a rotating disk with groups of blades of various lengths fixed on it, which are arranged symmetrically relative to a vertical axis, characterized in that, the disk surface is made of a concave spherical shape, while the outer edge of the disk has helical cuts in the zone of each group of blades, with the blades Each group is set in increments decreasing in the direction of rotation of the disk. Sources of information taken into account in the examination 1. Technique in agriculture 1980, If 2, p. IB-I. 2. USSR author's certificate If 378165, k. A 01 C 17/00, 1970 (prototype).