SU1037032A1 - Sealing device of rotating furnace - Google Patents

Description

This invention relates to a technique for sealing the gap between a rotary kiln and a fixed chamber and can be used in the building materials industry.

A rotary kiln seal is known that contains a rotating ring fixed on the furnace body and fixed rings fixed on a fixed chamber, between which a filling of granular material is placed, the rotating ring being placed between fixed rings with a gap of 0.1-0.9 minimum1: about size .flj.

A disadvantage of the known compaction is the need to manufacture parts with high accuracy, since it is difficult to make the rings over the entire surface with the same gap from one another.

The purpose of the invention is to increase the reliability of the seal.

This goal is achieved by the fact that a sealing device of a rotary kiln containing fixed rings fixed on a stationary chamber with a filling of granular material between them to form an annular chamber and a rotating element fixed to the furnace body and placed with a gap between the fixed rings the annular chamber is provided with an elastic element fixed inside the annular chamber and on both sides enclosing the revolving element.

In this case, the elastic element is made in the form of a grid. .

In addition, the elastic element is made in the form of cables, fastened together, between themselves with brackets.

Moreover, the brackets are made in the form of plate springs.

FIG. 1 shows the sealing device of a rotary kiln furnace with an elastic element in the form of a grid and 45 with an annular rotating element; in fig. 2 is the same., With an elastic element in the form of a grid and a cylindrical rotation of the element in FIG. 3 and 4 is the same for an elastic element in the form of 50 cables .-

The sealing device rotates; The rotary kiln contains a rotating element in the form of a ring 1 fixed on the furnace body 2 and placed 55 with a gap between the fixed rings 3 - 5 forming the annular chamber b with a funnel 7 and filling of granular material 8. Inside the annular chamber 6 an elastic 60 element is fixed in the form of a grid 9, covering it from the filling of granular material 8.

The rotating element can be made in the form of a cylinder 10, the length

which is. 1.25-1.5 axial stroke of the furnace.

The gap between the furnace body 2 and the annular chamber b is 1.05-1.2 furnace diameter (the greater the beating of the furnace axis, the greater the gap).

The width of the annular chamber is 2-3 times the axial stroke of the furnace and is constructive (in the case of a rotating element in the form of a cylinder 10, the width of the annular chamber is 1.5 2 axial stroke of the furnace). The diameter of the rotating element (ring 1, cylinder 10) is equal to 1, 1.4 diameter of the furnace. The size of the total clearance from the annular chamber b to the rotating element (ring 1, cylinder 10) is equal to 1.1 - 1.5 times the diameter of the axial stroke of the furnace, provided that the rotating element does not touch the circular element and the annular angle. The dimensions of the elastic element in the form of a grid 9 are determined structurally, and the dimensions of the grid cells are 0.8 to 0.9 of the minimum filling grain size.

The elastic element can be made in the form of closed flexible elements - cables 11, interconnected by brackets 12, pressing cables 11 to the rotational element (ring 1, cylinder 10) without a gap. The brackets 12 are made of lamellar springs for depressurization when worn, set in 100-200 mm. The arc size of the bracket 12, in the case of an incompatible element in video ring 1, is determined from the condition that it is not connected with it (in the case of a rotating element in the form of a cylinder 10, the size of the bracket 12 is 5-10% less than the width of the annular chamber b). The diameter of the cable 11 is 1.5 -Ij8 of the maximum total gap between the rotating member (ring 1, cylinder 10) and the annular chamber 6. Balls can be used as a granular material.

The rotary kiln sealing device works as follows.

When the kiln body 2 rotates, the rotating element (ring 1, cylinder 10) turns IB to the annular chamber b, where the elastic element of the grid 9 or cable 11 tightly encloses the rotating element, and the elastic element prevents the filling from pouring through the gap camera b and a rotating element, ensuring tightness of the seal and the elimination of cold air suction

If there is an axial stroke of the furnace or a beat, the elastic element in the form of a grid 9 is deformed accordingly.

The proposed design of the sealing device of the rotary kiln increases the reliability of the seal, allows its elements to be manufactured with less accuracy, which will lead to a reduction in the cost of manufacturing and repairs.

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Claims (4)

1. SEALING DEVICE; ROTATING FURNACES, containing fixed rings fixed to the stationary chamber with a granular material backfill placed between them to form an annular chamber, and a rotating element mounted on the furnace body and placed with a gap between the fixed rings of the annular chamber, the fact that in order to increase the reliability of the seal, it is equipped with an elastic element fixed inside the ring measurements, and on both sides covering the rotating element. 2. The device according to claim 1, with the exception that elastic. the element is made in the form of a grid. 3. The device according to π. 1, the fact that the elastic element is made in the form of ropes fastened together by brackets. 4. The device according to paragraphs. 1-3, it is noteworthy that the brackets are made in the form of leaf springs. g SU ... 1037032 I