SU1766627A1 - Method for preparation of frictional materials on the iron-base - Google Patents

Description

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The invention relates to the pneumatic transport of bulk materials and can be used in various sectors of the national economy for transporting cement, mineral powder, flour,

sugar, salt and other materials, :: 23 ± ;;

A pneumatic screw feeder is known that contains a horizontally mounted cylindrical body with two upper loading openings at its ends and a central discharge opening, housed in the housing. A driving screw with oppositely directed windings made along the length of the housing bore, and a mixing chamber with a reverse valve installed under the discharge opening of the housing (, "..",. ,,. ", ...

Also known is a pneumatic screw feeder that contains a horizontally installed cylindrical body with two loading openings of 1FN pT5 eTG to the ends and a lower central discharge pipe located in the body

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a driving screw with oppositely directed windings, each of which is made along the length of the auger shaft from the loading opening to the discharge pipe of the housing,

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: ™ -: lump located under the body discharge pipe and communicated with it

 The cher of the non-return valve, and with the source of compressed gas and the discharge body mounted on the auger shaft coaxially with it in the area of the housing unloading nozzle (2).

In the famous feeder discharge or-: TaTSSh1ShN in ID T

mounted on the ends of the opposite turns of the central part of the screw on its diametrically opposite sides longitudinally above the discharge opening with overlapping relative to each other.

 The well-known feeder partially solves the problem pbZhtshesh ravnbmёr nbssty filing

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ru, but the presence of only two strips, exciting material, does not exclude

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uneven feeding, which is associated with increased energy intensity.

The aim of the invention is to reduce energy consumption.

The task is achieved by the fact that in a pneumatic feeder containing a horizontally mounted cylindrical body with two upper loading openings at its ends and a lower central nozzle placed in the housing of the driving screw with oppositely directed windings, each of which is made along the length of the screw shaft from the loading opening to the discharge pipe of the housing, mixing chamber with the outlet pipe, placed under the discharge pipe of the housing and communicated with it by means of a check valve Ana and with a source of compressed gas, and an unloading body mounted on the screw shaft coaxially with it in the area of the body discharge pipe, the cylindrical body in its discharge pipe section is made with its radius increasing towards the discharge pipe in the direction of screw rotation, the discharge body is a disk with curvilinear blades fixed on its sides perpendicularly to them, curved in the direction opposite to the direction of rotation of the auger, and the discharge nipple is made with a scraper with a knife, directed by its cutting edge towards the rotation of the discharge body tangentially to the diameter of the circle of its curvilinear blades. The disk of the discharge body is made with a diameter exceeding the diameter of the circle of the ends of its curvilinear blades, and the stripping knife is made at its cutting edge with a slit not less than the width of the disk.

FIG. 1 shows a pneumatic screw feeder, top view, FIG. 2 shows section A-A in FIG. one

A pneumatic screw feeder consists of a shaft 1 with two symmetrically arranged screw surfaces of the right 2 and left 3 directions mounted in supports 4 In the center of the shaft there is a disk 5 with the curvilinear blades pressed on its sides symmetrically to the ends of the screw auger surfaces , 6, bent in the direction opposite to the direction of rotation of the auger. With the shaft, the disk is aligned along the radius R and is made with a diameter exceeding the diameter of the circumference of the ends of its curvilinear blades. The screw shaft with the disk is placed in a cylindrical housing 7 with sleeves 8 and 9

and a snail 10 and consists of two parts 11 and 12 connected along the longitudinal axis of symmetry. The cochlea has a discharge nipple 13, on which a stripping knife 14 is fixed at a tangent to the diameter of the circumference of its curvilinear blades with a central notch 15 disk. A mixing chamber 17 with a check valve 18 mounted on a rotary axis 19 with a counterweight 20 is connected to the discharge opening 16 of the discharge nipple 13. The housing has two upper loading openings 21 and 22, communicated

5 with a hopper 23 for feeding bulk material to the screws. The feeder is driven by an electric motor 24 mounted coaxially with the screw shaft.

The pneumatic screw feeder operates as follows.

From the hopper 23, the bulk material flows through the loading ports 21 and 22 of the housing 7 to the screw-screw surfaces 2 and 3 of the screw. At the same time, the electric motor 24 is turned on, and compressed air is supplied to the mixing chamber 17. Shaft 1 with screw surfaces 2 and 3 captures bulk material from housing 7 and feeds it into the cochlea 11, where it blades 6 discs 5 with centrifugal

0 is directed by an acceleration in a continuous flow into the discharge nozzle 13 Cleaning knife 14 at the discharge nozzle removes bulk material converging from curved blades, preventing the flow of bulk material back into the cochlea.

Continuous uniform flow of bulk material into the mixing chamber 17 prevents peak loads on the electric motor 24 reduces the energy intensity of the process and improves the mixing of the bulk material with the air flow in the mixing chamber.

As a result, power consumption is reduced and the range is increased.

5 transporting material.

Claims (1)

Claim 1. Pneumatic screw feeder containing horizontally mounted cylindrical body with two upper 0 loading openings at its ends and lower central discharge pipe, housed in the housing of a driving screw with oppositely directed windings, each of which is made along the length 5 of the screw shaft from the loading opening to the discharge pipe of the housing, mixing chamber with the outlet pipe, placed under the discharge pipe of the housing and communicated with it by means of a check valve and with a source of compressed