Seal rotary kiln

IPC classes for russian patent Seal rotary kiln (RU 2008595):

F27B7/24 - Seals between rotary and stationary parts

Another patents in same IPC classes:

Sealing device for rotating furnace / 2283996

Device comprises flexible casing whose one edge is secured to the unmovable chamber and the other edge is connected with the sealing ring. The edge of the sealing ring that faces the drum is made of two members that embrace the other contact ring from two sides. The contact ring is secured to the rotating drum. The device is provided with rollers mounted for permitting free rotation on the axles passing through the sealing ring.

Screw for transportation of solid material with sealing structure and method for producing and utilization of reduced metal / 2299389

Drive shaft of solid substance feeding screw is extending within through openings provided within both side walls of heating furnace, and is held on liftable supporting devices positioned at both sides of furnace. Sealing structure has sealing blocks positioned outside the furnace on outer edges of through openings, said sealing blocks circumferentially surrounding said through openings, and movable shields equipped with openings for sliding of drive shaft for screw. Movable shields are brought into contact with sealing blocks through sealing members so as to be moved in vertical planes.

Unit of sealing furnace worm shaft with granular materials / 2456521

Unit of sealing furnace worm shaft with granular materials contains screw 1, sealing bushing 2, whereby in the sealing area the shaft is equipped with sleeve 4 made of a high strength material and it has spiral grooves 6 with a polished surface and slopes 7 with angles of over 10 degrees on outer surface 5 in order to avoid self-blocking in the grooves of the granular material. The said sealing bushing 2 has grooves 10 with polished surface on internal surface 9 that are made capable of rotating in the direction opposite to the one of the shaft and slopes 11 with angles excluding a possibility of material self-blocking in the grooves whereby the shaft rotating direction ensures squirting of granular material 8 back into furnace 12.

(57) Abstract:

Usage: in the building materials industry, in particular in devices for sealing a gap between the rotating and stationary parts of rotary kilns, drying drums. The inventive seal includes a sealing ring made of separate elements, coupled to the castle and pressed against the fixed camera and the rotary kiln by means of rollers skip through them with a wire cable with a tension device and a support roller, which is provided with a sealing ring. Lock connection is made in the form of a plate with a slot, through which passes a loop, with the plate welded to the edge of the element sealing ring with a gap relative to the subsequent item on which the welded loop. On the fixed camera swivel has a spring-loaded lever that interacts with the loop, and the rollers and support rollers are made with a loose fit axles attached to the elements of the sealing ring. The elements of the sealing ring provided with a rack which is fixed to the plate with the attached axes of the rollers. The plate has a threaded sleeve under the axis of the rollers. The lever can be Vyborg, fixed the camera and the other in the loop lock. 3 C. p. F.-ly, 3 ill.

The invention relates to the construction materials industry, in particular to a device for sealing a gap between the rotating and stationary parts of rotary kilns, drying drums.

Known seal for a rotary kiln containing ring Elevator, attached side wall to the discharge end of the furnace, covering the front of the stationary camera flange mounted on the end wall of the chamber, and a sealing ring composed of ring sectors established between the Elevator and the flange is pressed against the flange and the United U-shaped rods with Elevator, on the flange of the stationary camera hinged sliding of the bar, pressed by springs to the ring sectors of the sealing ring, and the beam is equipped with brackets into the slots which pairs are the ends of the U-shaped rod, angled to each other in the direction of the sectors to the end of the Elevator [1] .

A disadvantage of the known seals is the complexity of the design.

It is also known a device for sealing a gap between the rotary and stationary cameras, codereading ring to the rotary kiln and a stationary camera, the preload mechanism made in the form of two shoulders of levers pivoted on the fixed chamber by means of a spring, with the rollers mounted on each sector at a distance from its edges [2] .

A disadvantage of the known design is the complexity and unreliability.

The closest in technical essence and the achieved result to the invention is a seal rotary kiln containing a sealing ring made of separate elements, coupled to the castle and pressed against the fixed camera and the rotary kiln by means of rollers skip through them with a wire cable with a tension device and a support roller, which is provided with o-ring [3] .

A disadvantage of the known device is unreliability in the work.

The aim of the invention is to improve the reliability of the seal by providing "security" for beating the end of the furnace and prevent its separation from the stationary camera when reverse the course of the furnace housing.

In Fig. 1 shows a General view of the seal of Fig. 2 is a view along arrow a in Fig. 1; Fig. 3 is a view along arrow B in Fig. 1.

The seal consists of a sealing ring 1 made of separate elementarnye rollers 7, based on the furnace body 8.

The elements of the sealing ring connected to the castle. Lock connection is made in the form welded to the edge of the element sealing ring plate 9 with a groove 10 that is installed with a gap relative to the next element, and welded to the last loop 11. included in the groove 10 of the plate 9 locking connection.

On the fixed camera 3 hinge has a spring-loaded lever 12 that interacts with a loop 11. Each of the rollers 4 and 7 are made with a loose fit of the axes 13, rigidly attached to the elements of the sealing ring.

Items 2 seal rings made with racks 14 and fixed on them (for example, by means of bolts 15) plates 16, which established the axis of the rollers.

The plates 16 are threaded sleeve 17 under axis 13.

A spring-loaded lever 12 can be made in the form of a plate fixed at its edges mutually parallel fingers 18 and 19. The finger 18 is inserted into the sleeve 20, fixed to the camera 3, and the finger 19 is inserted into the loop 11 and under the action of spring node 21, the United thrust 22 with the lever 12, is pressed against the plate 9.

On the fixed camera 3 is fixed plates 23 and 24 with R is received, the washer 28 and the pin 29.

Seal rotary kiln operates as follows.

Since one end of the cable 5 is fixed to the plates 23 and 24, the cable 5, covering the rollers 4 of the sealing ring 1 and the rollers 25 and 26, under the action of loads 6 through the axis 13 tends to press the elements 2 to the furnace body 8. However, the support rollers 7 against the furnace body 8, preventing the contact elements 2 with the furnace body 8, forming a small annular gap between the sealing ring 1 and the furnace body 8.

At the same time, the lever 12 under the influence of spring node 21 through the rod 22 is rotated in the sleeve 20 on the finger 18 and the finger 19 presses on the plate 9 of the element 2, pressing it to a fixed camera 3. Loop 11 holds the element 2 on the finger 19, preventing the rolling elements 2 and the furnace body 8.

During the rotation of the furnace body 8 between it and the supporting rollers 7 having friction force tending to roll the elements 2 in the furnace body 8. However, the finger 19 and the loop 11 prevent this.

As can be seen from Fig. 3, the lever 12 is at an angle to the axis of rotation of the furnace body 8, less 90^about. As a result, the force produced by the rotation of the furnace body 8, will tend to rotate the lever 12 in the sleeve 20 on the finger 18, thereby ugget more pressure on the plate 9 and tightly grip element 2 fixed to the camera 3. Therefore, during the rotation of the furnace body 8 of the sealing ring 1 is denser than to cuddle up to a fixed camera 3.

When the radial runout of the furnace body 8 items 2 o-ring, constantly touching it supporting rollers 7, will move along the fingers 19, thereby eliminating breakage of the ring 1.

When thermal deformation of the element 2, the plate 16, secured to the uprights 14 by bolts will maintain its straightness, thereby preventing the skew axis 13 relative to the axis of rotation of the furnace body 8, which leads to an increase of the service life of the supporting rollers 7, because the presence of skew increases the friction force between the support rollers 7 and the furnace body 8, therefore, increases the wear and tear of their working surfaces.

When you wear the axis 13 she come unscrewed from the sleeve 17 and is replaced with a new one. The rib 27 increases the rigidity of the plate 16. The washer 28 and the pin 29 to hold the rollers 4 and the supporting rollers 7 on the axis 13, thereby the operability of the seal as a whole.

Plate 16 mounted on the uprights 14, prevents the misalignment of the support roller when thermal deformation, a threaded sleeve 17 provides the change of axes in the plates and the lever in the form of a plate with mutually by "tracking" elements 2 sealing ring 1 for the radial runout of the furnace body 8, thereby preventing damage to the seal as a whole. In addition, the forces occurring during rotation of the furnace body 8, are used for a more snug fit of the sealing ring 1 to a fixed camera 3, which increases the efficiency of the seal. (56) 1. USSR author's certificate N 531978, CL F 27 B 7/24, 1974.

2. USSR author's certificate N 771444, CL F 27 B 7/24, 1978.

3. USSR author's certificate N 773405, CL F 27 B 7/24, 1979.

1. SEAL ROTARY KILN containing a sealing ring made of separate elements, coupled to the castle and pressed against the fixed camera and the rotary kiln by means of rollers skip through them the rope with weights and rollers connected to the elements of the sealing ring, wherein the locking connection is made in the form welded to the edge of element o-ring seal plate grooves installed with a gap relative to the next element and welded to the last loop, which groove plate locking connection, each roller is made with a loose fit axles rigidly mounted on the elements of the sealing ring, and on the fixed camera swivel has sprung the elements of the sealing ring is made with posts and fixed on them plates, have the axis of the rollers.

3. Seal under item 2, characterized in that the plates have threaded bushings axis of the rollers.

4. Seal under item 1, characterized in that the lever is made in the form of a plate fixed at its edges mutually parallel fingers, one of which is included in the sleeve attached to a fixed camera, and the other in the loop lock.