SU1677470A1 - Device for sealing clearance between a rotary furnace and a stationary chamber - Google Patents

Description

one

(21) 4676333/33

(22) 04/11/89

(46) 09/15/91. Bul №34

(71) Karachay-Cherkess cement plant

(72) V.S. Platonov, Yu.G.Redko, V.P. Kozka, L.I.Tkach. A.M.Bogin, I.Ya.Lazutov and S.V.Yan- kelevich

(53) 666.94.041 (088.8)

(56) Boganov A.I. Mechanical equipment of cement plants. M .: Mashgiz, 1961, p. 297-298.

(54) DEVICE FOR SEALING GAP BETWEEN A ROTATING OVEN AND A STILL CAMERA

(57) The invention relates to the equipment of the cement industry and is intended to eliminate cold air from the discharge end of a rotary kiln. The purpose of the invention is to improve the tightness and operational reliability of the seal. For this, the seal is created by pressing the stationary shell 2 in the form of an ellipse of the sealing ring in the form of sectors 3 with Roller supports 7, due to which the sealing ring has the possibility of axial movement. The engagement with the additional shell 4 of the sealing ring prevents it from slipping relative to the fixed shell 2 and their constant compression. 1 hp ff, 5 ill.

ON VI

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The invention relates to the equipment of the cement industry, namely to devices for sealing the gap between the rotary kiln discharge end and the fixed chamber, and can be used in the metallurgical, chemical and other industries that require sealing devices for the high-temperature sections of rotating drums,

The purpose of the invention is to improve the tightness and operational reliability of the seal.

FIG. 1 shows a device for sealing the gap between a rotary kiln and a fixed chamber, a general view; in fig. 2 is a view A of FIG. one; in fig. 3 - the node in FIG. 2; in fig. 4 - the location of Katkov supports relative to the edges of the furnace body; in fig. 5 - sealing the joint with a flexible elastic element.

The device for sealing the gap between the rotary kiln and the fixed chamber contains a fixed shell 2 fixed on the fixed chamber 1.

The end plane of the shell 2 is perpendicular to the axis of the furnace. A sealing ring of separate sectors 3 mounted between this fixed shell 2 and additional shell 4 installed with a gap relative to the furnace body 5 adjoins this plane. The sealing ring sector 3 is made with protrusions 6 on the outer surface and the roller supports 7 sec. 8, in contact with longitudinal ribs 9, made on the furnace body. The additional shell 4 is hollowed out with slots for the fins 9 and recesses 10 of a trough-shaped shape for the projections b of the sealing ring. The stationary shell 2 is made in the form of an ellipse, the large axis of which is smaller than the outer diameter of the sealing ring, the radial thrust, and the small axis is smaller by its value than its internal diameter. The axes of the supports 7 are located in a plane perpendicular to the axis of the furnace, and are directed parallel to the tangents to its body. The roller bearings 7i are evenly distributed around the circumference of the sealing ring.

Radial engagement of the sealing ring with the additional shell 4 occurs due to the placement of the protrusion 6 sectors of the sealing ring in the trough-shaped recess 10 on the additional shell 4. To press the sealing ring to the shell 2, a pressing device with pressure rollers is used

articulated levers 12 and weights 13. However, their use is not necessary, since the sealing ring presses against the shell 2 due to rolling down the furnace slope. The axis of the pressure rollers 11 are directed along the radii to the axis of the furnace.

In case of insufficient rigidity of the additional shell 4 or in its absence, the rollers 7 of the sealing ring are supported on the furnace body 5 through longitudinal ribs 9.

To completely eliminate air leaks in the seal, sealing the joint with a flexible elastic element can be applied, for example, asbestos cloth cuff 14, which is pressed against the sealing ring by straps 15 and stretched with cable 16.

The device for sealing the gap between the rotary kiln and the fixed chamber works as follows.

When the furnace rotates, the additional shell 4 is rotated along with it, from which the radial engagement assembly, consisting of a trough-shaped recess 10 and protrusion 6, is brought into rotation, and together with the cue an o-ring. Relying on the additional shell 4 with roller shutters 7 - alternately of the supports that are in the upper position - the sealing ring all the time tends to move down the furnace slope and, thus, constantly presses against the fixed shell 2,

When axially moving the furnace, the sealing lance remains pressed against the fixed shell, and the furnace itself moves inside the sealing ring along its supporting rollers and rolls into the stationary stationary chamber 1.

When the furnace is axially upward, the sealing ring on its rollers rolls down the furnace slope both under the influence of the weight of the ring itself and due to the force generated by the loads 13 and acting on the ring through the levers 12 and the rollers 11. At the same time, the sealing ring remains pressed to the end fixed shell that provides the necessary tightness of the seal.

In the proposed seal design, it is possible to fit the sealing ring on the furnace with a minimum radial clearance and to completely cover this gap with an elastic cuff 14, pressed by the strips 15 to the ring, and by a tight cable 16 to the furnace. Due to the fact that the furnace and the sealing ring are relative to each other they do not rotate (this is prevented by the presence of radial engagement), but only slowly move in the axial direction, the cuff 14 is practically not subject to wear. This ensures a long and reliable sealing operation.

This also contributes to the implementation of the fixed shell in the form of an ellipse, upon contact with which the surface of the sealing ring wears evenly across its entire width.

Claims (2)

Claim 1. Device for sealing the gap between the rotary kiln and the fixed chamber, comprising a fixed shell fixed on the latter, an additional shell installed with a gap relative to the furnace body, and a sealing ring from separate sectors mounted between the fixed and additional shell, different in that that in order to increase tightness and operational reliability seals, sealing ring sectors are made with protrusions on the outer surface and Katkovy supports in contact with the longitudinal ribs made on the furnace body, the additional shell is made with slots for the body edges and recesses for the sealing ring projections, and the fixed shell is made in the form of an ellipse large the axis of which is smaller than the outer diameter of the sealing ring by the amount of radial beats, and the small axis is smaller than its internal diameter by the same value, while wife in a plane perpendicular to the axis of the furnace, and are directed parallel to the tangents to her body. 2. The device according to claim 1, characterized by the fact. that it is equipped with a clamping device with rollers in contact with the sealing ring. W Yu 3 Fig.Z Fcgl FIG. five