SU1375923A1 - Arrangement for sealing labyrinth-type rotating furnace - Google Patents

Abstract

The invention relates to the design of rotary kiln seals and can be used in non-ferrous and ferrous metallurgy, as well as in the building materials industry. The purpose of the invention is to improve the tightness, reliability and life of the D. -1 "/ seal service. With temperature expansions of the furnace body 1, the inner rings 2 move with the body until they come into contact with the outer rings 3, which are moved together with the annular insert 4 sliding along the rollers 6 mounted on the fixed chamber 7. The mechanism for moving the insert along the furnace axis is flanges mounted on the furnace body 1 and located between them in a plane parallel to the furnace axis, and fixed to at least one disk insert, the axis of which is perpendicular to the axis of the furnace. for a downshift transmission that reduces the force required for the transfer and the ring insert with outer rings. 3 "This reduces wear on the sealing elements. 3 hp f-ly, 3 ill. 1 "/ t 7 f p

Description

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The invention relates to the design of rotary kiln seals and can be used in non-ferrous and ferrous metallurgy, in the building materials industry.

The purpose of the inventions is to increase the tightness, reliability and seal life.

FIG. Figure 1 shows the proposed device for compacting a rotary kiln, a longitudinal section in FIG. 2, a section A-A in FIG. 1, in FIG. 3 shows a longitudinal section at the arrangement of the flanges of the mechanism for moving the liner on the furnace body.

The device contains inner rings 2 mounted on the furnace body 1. The outer rings 3 are mounted on the inner surface of the annular insert 4, which encloses the furnace body 1 with the inner rings 2, forming a labyrinth for the passage of gases. An annular liner D is made with a running part for moving along the axis of the furnace, made in the form of rails 5 mounted on a vane, and rollers 6 mounted on the shell of the fixed chamber 7. Between the insert 4 and the fixed chamber 7, a mechanical seal is installed elastic element 8 or labyrinth seal 9o

The annular liner 4 is made with a mechanism for moving along the axis of the furnace, which consists of flanges 10 and 11 installed on the furnace body 1 and placed between them in a plane parallel to the axis of the furnace and fixed to at least one disk 12, the axis of which is perpendicular Dicultural axis of the furnace.

The disk of the liner movement mechanism can be fixed on the furnace body, and the flanges 10 and 11 on the liner.

If the disc 12 is mounted on the liner, it can be made with a reduction gear in the form of a worm gear 14 located on one shaft with a screw 13 and a screw 15 coaxial with it, inserted into a nut 16 mounted on a fixed chamber 7.

The device works as follows.

The internal volume of the furnace case 1 during operation is

Q 5

20 25 jg

55

35

40

45

50

under vacuum at the hot end of 2-5 mm water column, on the cold - 100-200 mm water column. In order to minimize the inflow of ambient air inside the furnace, the gaps between the side surfaces of rings 2 and 3 are set as low as possible, on the order of 5-15 mm, depending on the diameter of the furnace.

To compensate for the radial bo of the furnace, the gaps between the inner rings 2 and the insert 4 and the outer rings 3 and the furnace body 1 are set larger than the size of the radial boiler. When moving the furnace body along the axis, for example, at temperature expansions of the body, the rings 2 move with the body until it comes into contact with the rings 3 and shift them with the insert 4 along the rollers 6.

As a result of the inclination of the furnace to the horizon, the pbd of an angle of 2-3 °, the ring bush does not roll down the rollers under the action of its weight.

The face seal, installed in the space between the insert and the fixed chamber, prevents cold air from leaking into the furnace.

By performing an insert with a moving mechanism, the wear of the inner and outer rings 2 and 3 of the labyrinth seal is reduced.

Installing a downshift on the disk 12 significantly reduces the force required to move the insert 4, which reduces the wear of the sealing elements.

The proposed apparatus for compacting a labyrinth-type rotary kiln improves leaktightness — sealing and its reliability, while increasing its service life.

Claims (4)

1. Device for sealing turn. labyrinth type labyrinth furnace, which contains inner rings mounted on the furnace body and outer rings connected to the fixed chamber, characterized in that, in order to improve tightness, reliability and seal life, the furnace body with inner rings is annularly enclosed, made with the chassis for moving along the axis of the furnace, and placed between the annular insert and the fixed chamber with an end seal, while the outer rings are mounted on the inner surface of the Finger inserts. 2o The device according to claim I, is designed in that it is provided with a mechanism for moving the liner along the axis of the furnace. 2 The device according to claim 2, characterized in that the transfer mechanism is made up of flanges mounted on the furnace body and located between them in a plane parallel to the furnace axis and fixed on at least one disk: one disk perpendicular to the furnace axis. 4. The device according to PP. 2 and 3, about T, characterized in that the movement mechanism discs are provided with a reduction gear. Aa 1 YuL Phi. H