SU1645039A1 - Pneuamtic and inertia separator - Google Patents

Description

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The invention relates to agricultural machinery, in particular, to devices for separating a grain-straw heap by air flow.

The aim of the invention is to increase the separation efficiency of the grain straw straw.

Figure 1 shows the device, a longitudinal section; figure 2 - section aa in figure 1.

Grain heap separator contains a device for supplying heap 1, separation chamber 2 with sequentially located trapezoidal pneumatic channels 3 and 4, reflector 5. common air flow conductor 6c with air flow regulator 7, centrifugal fan 8. Separation chamber 2 under the plane The throw-in 9 is made in the form of a rectangle, and above the throw-in plane 9 - consecutively at least two located at some distance from each other. channels 3 and 4 of trapezoidal shape with a smaller section 10 above. The smaller cross section of 10 channels 3 and 4 is the windows for removing impurities from separation chamber 2 and they are hermetically connected by HLI pneumatic lines 11 and 12 through a common pneumatic line b with a suction window of the centrifugal fan 8. At the beginning of the common pneumatic line 6, the air flow regulator 7 is installed In channels 3 and 4, which is made in the form of a block of independently rotating flaps 13 and 14, the number of which corresponds to the number of channels (in this case, two). A reflector inclined is inclined between the internal walls of a large cross section of channels 3 and 4. On the lower part of the side walls of separation chamber 2, air collectors 15 are installed under each channel 3 and 4 (Fig. 2. The plane of the throw-in 9 is determined by the tape section of the device 1; they touch KOTO-ROM and are parallel and above the plane 16 of the upper base of the lateral air collectors 15 (Fig, 2).

The separator works as follows

The heap-straw pile is thrown into the separation chamber with a flat thin stream by a feeding device. In the separation chamber 2 under the action of the aspiration of the air flow returned by the fan 8 through the channel

3, the separation into fractions, characterized by a reserve of kinetic energy. At the same time, particles with malm stock of kinetic energy (chaff, colony) under the action of the aspiration air flow move along steeply curved trajectories and through pneumatic lines 12 and 6 by the fan 8 are carried outside the separation chamber 2. However, light particles located in the lower layer of the jet of the heap, under the action of the first aspiration air flow, begins to move upward, but carried away by heavier particles, fly through it and fall under the action of the second aspiration air flow, where they are separated and The pneumatic lines 11 and 6 are cut by the fan 8 outside the separation chamber, and the particles with a large supply of kinetic energy (grain), after two suction air flows, are deposited in the separation chamber 2 and removed from it in any way. At the same time, part of the particles having an average kinetic energy reserve, under the action of the first aspiration air flow, changes its trajectory and moves along gentle trajectories upwards, but, after the first aspiration air flow passes, it hits the obliquely mounted reflector 5, connecting the inner adjacent walls of the channels 3 and 4, and reflecting from it. At the same time, particles with a higher density (grain) are reflected at an angle equal to the angle of encounter, changing the direction of movement, penetrate the second air flow and are deposited in separation chamber 2, and particles having a small density but high windage (harbor), the slides along the surface of the deflector are subject to the second aspiration air flow and are carried outside the separation chamber 2.

To reduce the removal of grain with light particles, the speed of aspiration air flow in the first channel 3 should be higher than in the second channel 4.

With a change in the fractional composition of the grain and their quantitative content in the grain-straw heap to ensure throughput and the quality of separation, it is also necessary to adjust the air flow rate

ka in channels 3 and 4 in accordance with the aerodynamic properties of the fraction of the main product and impurities.

The speed of the air flow in the channels 3 and 4 is controlled by the air flow regulator 7 installed at the beginning of the common pneumatic line 6, which consists of two independently movable flaps 13 and 14 turning around a common axis.

The proposed separation chamber design with consecutive channels above the intake plane ensures good quality of grain cleaning and high throughput when separating a grain-straw heap with straw content up to 35%.

1645039

Formulas

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Claims (2)

1. A pneumatic inertial separator comprising a device for feeding a pile, a separation chamber, a pneumatic conduit, characterized in that, in order to increase the separation efficiency of the grain-straw heap, the separation chamber is equipped with additional pneumatic channels installed in series along the mass with pneumatic channels equipped with reflectors. 2. The separator according to claim 1, about t l and h a-y y and with the fact that in the general pneumatic conduit there are valves installed according to the number of pneumatic channels.