SU1113186A2 - Pneumatic separating device of grain cleaner - Google Patents

Abstract

PNEUMATIC MECHANICAL DEVICE FOR THE GRAIN-CLEANING MACHINE WITH AUTH. St. t 860889, characterized in that, in order to improve the quality of separation by setting the optimum values of air velocities in the aspiration systems, the device is equipped with a pipe connecting the suction side of the fan with the settling chamber of the second aspiration system; the first aspiration system. (L 00 00 O)

Description

The invention relates to agricultural production and is intended for the cleaning and sorting of grain.

According to the main author. St. No. 860889 a pneumatic separating device for a grain cleaning machine is known, which includes settling chambers, two closed suction systems with. a diametrical fan installed between these systems, the suction window of the fan being connected to the settling chamber of the first aspiration system, and the discharge window to the air inlet channel of the second aspiration system supplying and discharging devices (IJ.

A disadvantage of the known device is the inability to control the air velocity in the aspiration systems independently of each other, which leads to a decrease in the quality of the separation products.

The purpose of the invention is to improve the quality of separation by establishing the optimum values of air velocities in the suction channels.

The goal is achieved by the fact that the pneumatic separating device of the grain cleaning machine is equipped with a pipe connecting the suction window of the fan with the settling chamber of the second aspiration system, and a valve is installed in the pipe to regulate the air velocity in the first aspiration system.

FIG. 1 shows a general view of the device; FIG. 2 - the results of comparative tests of the seed cleaning machine SM-4 using a pneumo-separating device according to the prototype and proposed.

The device consists of a diametrical fan 1 and two series-connected aspiration systems, forming one closed system. The primary seed cleaning system consists of an air supply for the channel 2, an aspiration channel 3 with a feeding device 4, a mechanism 5 for extracting a mixture of grain and a settling chamber 6 with a mechanism 7 for removing impurities. The secondary cleaning system includes an air supply channel B, an aspiration channel 9 with a power supply device 10 and a mechanism for outputting purified grain, a settling chamber 12 with a mechanism for outputting 13 broken and dull grains. The device is equipped with an attorney 14 with a valve 15 for controlling the air velocity in the first suction channel.

The suction window of the fan 1 is simultaneously connected to the settling piping b of the first aspiration system by means of a nipple 14 - from the clumping caero / 12 of the second aspiration system.

Channel 8 has a window 16, and an air purification filter 17 is inserted between the adjacent walls of the aspiration 9 and the air supplying 8 channels.

If necessary, the pneumatic separator can be equipped with sieves and three-cylinder cylinders.

The device works as follows.

The cleaned grain material is fed by a melting device 4 into

an aspiration channel 3, in which light impurities are separated and carried away by the air flow created by the fan 1, into the settling chamber 6, 5 where it is deposited and by the mechanism 7 is brought out of the machine. The air cleared of light impurities from the settling chamber enters the fan 1. From the suction channel 3 Q, the grain cleared of light impurities is fed by mechanism 5 to a sieve mill (not shown), after processing on which the grain mixture is directed by mechanism 10 to the second aspiration channel 9. In the aspiration channel 9, broken and puny grains are removed from the grain mixture by air flow, which enter the settling chamber 12 and are removed from it outside the machine by mechanism 13. The cleaned grain is brought out by mechanism 11.

Part of the dusty air through the window 16 is directed to the filter 17, where it is cleaned of dust, and the purified air enters the atmosphere. 5 Providing the optimum values of air velocities in the aspiration channels is carried out as follows. By varying the frequency of rotation of the impeller of the fan 1, the air velocity is controlled simultaneously in the first 3 and second 9 aspiration channels. The required rotational speed of the fan wheel is set at the required rate of 5 air in the second aspiration channel 9. To provide the required air velocity in the first aspiration channel 3, the valve 15 of the nozzle 14 is set in Q to the appropriate position, changing the orifice of the nozzle.

In order to determine the technological parameters of the operation of the pneumoseparking device, comparative tests of the SM-4 family of seed machines were carried out using the prototype pneumatic separator device and proposed (Fig. 2).

The test results showed that the use of the proposed pneumo-separator in seed-cleaning machines would allow, by improving the quality of separation and reducing grain losses, a significant economic effect.

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Claims (1)

PNEUMOSPARATING DEVICE; STVO GRAIN CLEANING MACHINE St. No. 860889, characterized in that, in order to improve the quality of separation by establishing optimal values of air velocities in aspiration systems, the device is equipped with a nozzle connecting the suction window of the fan with the settling chamber of the second aspiration system, and a valve for regulating the air speed in the first aspiration is installed in the nozzle system. Q 4W ί 98PCT