SU872923A1 - Rotating furnace packing - Google Patents

Description

(54) SEALING ROTATING FURNACE

one

The invention relates to a technique for sealing gaps between rotating and stationary objects and can be used in the building materials industry, ferrous and non-ferrous metallurgy.

A seal is known that contains rotating and non-rotating sealing rings, which are pressed against each other by springs, which ensures the sealing of the gap between the rotating drum and the fixed chamber 1.

The closest in technical essence and the achieved result to the proposed is a seal of the rotary kiln containing sealing rings, one of which is rigidly fixed on the furnace body and the other on the fixed chamber, and a cylindrical shell freely mounted on the furnace body fixed against axial movement sealing rings, with the relatively fixed sealing ring, the shell is fixed by means of springs, and the relatively rotating ring is rigid to it Replenishment 2.

A disadvantage of the known seals is the design complexity to low Reliability.

The complexity of the design is due to the large diameters of the rotating drums, which reach 5-7 m. Therefore, the sealing rings must be processed on unique machine tools. But even if these rings are processed exactly, that’s all. equally they are poorly suited to one another, due to the beating of the body of Chba.raban due to fQ inaccuracy, installation and distortion of the drum axis during operation. In addition, the relative radial movements of the rings cause additional wear.

The purpose of the invention is to simplify the design and increase the reliability of the seal.

This goal is achieved by the fact that in a rotating chain seal containing sealing rings, one of which is fixed on the furnace body and the other on the fixed chamber, and a cylindrical shell freely fixed on the furnace body fixed from axial movement relative to the sealing rings installed

inside rotating and stationary sealing rings.

O-rings are made of antifriction material, or in the form of seals.

FIG. 1 shows a seal, a longitudinal section; in fig. 2 — node I in FIG. 1 (sealing rings of antifriction material); in fig. 3 shows the node I in FIG. 1 (o-rings in the form of seals).

The rotary kiln 1 enters the fixed chamber 2, on which a fixed sealing ring 4 is fixed by means of the collar 3. The rotary sealing ring 6 is fixed on the rotary kiln 1 by means of the collar 5. A cylindrical shell 7 is freely located inside the sealing rings 4, 6 the diameter of the collars 3, 5 and the shell 7 are determined by the amount of beating (misalignment) of the rotary kiln 1 relative to the sealing ring 4 (the larger the beat, the larger their dimensions in diameter). The thickness of the shell 7 is determined by the required service life. The thinner the shell 7, the better it deforms and fits against the sealing rings 4, 6, but at the same time, the service life is reduced. If the rotary kiln 1 has an axial movement, then the shell 7 is fixed against axial movement either relative to the chamber 2 with the fingers 8 and the leads 9, or relative to the furnace body 1 with the fingers 10 and the leads 11 (shown by dotted lines).

Sealing rings 4, 6 can be assembled from plates of antifriction material 12, such as graphite. In another embodiment, the sealing rings 4, 6 are made in the form of glands 13, which are placed between the collars 3, 5 and the rings 14, which can be bolted 15. In this case, lubrication is applied to the glands 13 from the device 16.

Seal works as follows.

When the furnace 1 rotates with a beating relative to the chamber 2, the cylindrical shell 7 compensates for this beating due to a skew in the rings 4, 6. Moreover, due to the large diameter of the shell 7 and its thinness, it fits well to the rings 4, 6, which can not be exactly around the circumference.

If the furnace 1 has an axial movement, then to exclude the release of the shell 7 from the rings 4, 6, there are fingers 8, 10 and drivers 9, 11. To reduce the wear of the shell 7 at the points of contact with the rings 4, 6 the latter are made of an antifriction material 12,

for example graphite. The same can be achieved with the help of oil seals 13 with lubricant. The use of the proposed seal simplifies its design and makes it possible to manufacture it under conditions of operation with the use of elementary devices. At the same time, the reliability of operation is improved, as the relative beats of the furnace 1 and chamber 2 are compensated.

Claims (3)

1. Sealing rotary kiln containing sealing rings, one of which is rigidly fixed on the furnace body and the other on the fixed chamber, and a cylindrical shell freely mounted on the furnace body fixed against axial movement relative to the sealing rings, characterized in that in order to simplify the construction and increase the reliability of the seal, the cylindrical shell is installed inside the rotating and fixed sealing rings. 2. Sealing according to claim 1, characterized in that the sealing rings are made from antifriction material. 3. Seal under item I, -Distinguishing by the fact that the sealing rings are made in the form of seals. Sources of information taken into account in the examination 1. Khodorov EI Cement cement kilns. L., Stroyizdat, 1968, p. 164, fig. 78 2. USSR author's certificate number 39664, cl. F27 В 7/24, 1933 (prototype). sh  : 7 7 7 phage. / 1g .2