SU1434226A1 - Rotary furnace roller bearing - Google Patents

Abstract

The invention relates to structural elements of rotary kilns and can be used in cement. chemical and metallurgical industries. The aim of the invention is to increase the life of the roller and thrust bearings. In the roller bearing one of the thrust bearings perceives the calculated axial force, and the other takes the force of the roller 1, thereby increasing the service life of the bearings 7 and 8. The radial bearings 3 are rigidly fixed in the cup 4, and the axis of the roller 1 is movable relative to the inner rings of the thrust bearings 7 and 8, which ensures an increase in the service life of the glasses 4, roller 1 and bearings 7, and 8, 2 hp f-ly, 4 ill. about

Description

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The invention relates to constructive elements of rotary kilns and can be used in cement chemical and metallurgical industries.

The aim of the invention is to increase the service life of the roller and thrust bearings.

: FIG. 1 shows the support roller I of the rotary kiln of FIG. 2 is a section (elastic element) in FIG. in fig. 3 - the principle of the support roller; in fig. 4 - the same with the calculated load value, the support roller 1 is fixed on the axis 2, which through the bearings 3 the quality and the cup 4 rests on the body: the bearings 5, on the neck of the roller axis

the sleeves 6 are fixed on which with; the thrust bearings 7 and 8 are mounted on them; A nut 9 fixes the sleeves 6 and a spreading ring; 10 on the axis 2. There are stops in the holes of the sleeves b, consisting of a bolt 11, springs 12 and nuts .IZO Cylinders 14 and 15 are attached to glass 4, between which I is clamped I elastic element, made in the form of Idisk 16, in the holes of which on each side there are axes 1 7 with cup springs. 19 (Fig. 1 and 2). The cylinder 20 is attached to the cylinder-15.

Rolikoopora works sl.eduysh 1m way.

; In the absence of an axial force Q, I acting on the roller, the thrust bearings 7 and 8 are arranged symmetrically to the elastic element. The stops provide pressure of the bearings 7 and 8 to the axis 17 of the elastic element.

When the roller 1 has an axial force Q. directed from right to left (fig. 3) j causing deformation of the springs 18 by the amount c /, the axis 2 moves to the left together with the bushings 6, the spacer ring 10, the bearing 8 and the nut 9, The bearing 8 compresses the springs 18 by the amount of f c /, and the bearing 7 remains stationary relative to the cylinder 14 due to the action of the spring-loaded stops 11. Due to this, the gap d is maintained between the flange of the cylinder 14 and the bearing 7, the gap between the spacer ring 10 and this bearing 7 is completely selected, and the gap between the flange of the cylinder 15 and the bearing 8 increases to 2 cf ,. In this case, the force Q is perceived by the bearing 8. In the case of an increase in the load acting on the roller in the same direction, the axis 2 continues to shift relative to the cup 4 and the cylinders 14 and 15 together with all parts installed on it, i.e.

Q with bushings 6, bearings 7 and 8, ring 10 and nut 9. Movement of the bearing 7 is provided by the impact of the spacer 10 on it. When the axial force Q reaches the equal value of the axial load on one bearing 8, i.e. at Q Rrd, c, the springs 18 of the elastic element are deformed by f / j (see Fig. 4). In this case, the bearing 7 selects a gap with a /, and rests against the flange of the cylinder 14, and the gap between the bearing 8 and the flange of the cylinder 15 is equal to 3 /. Due to the fact that the stiffness of this flange is much higher than the stiffness of the disc springs 18 and 19, the further increase in load (corresponding to the overload of the roller 1) is mainly perceived by the bearing 7. In this case, a gap c is formed between the fixed bearing ring 8 and the stop 11. When the axial force Q is directed from left to right, the axis of the roller 2 with bushings 6, the adjusting ring 10, the bearing 7 and the nut 9 move to the right. At the same time, the bearing 7 slips the disk springs 19. When the movement of the axis 2 of the roller 1 reaches cf ,, the annular ring 10 rests in a stationary bearing relative to the cup 15, the bearing 8. The gap between the flange of the cylinder 14 and the bearing 7 is 2c (i, and the gap between the flange of the cylinder 15 and the bearing 8 does not change, i.e. remains equal to , thanks to the impact of the spring-loaded stops 11. At this moment only bearing 7. When the axial load acting from left to right reaches the calculated value, the total movement of the axis 2 of the roller i reaches 2, and a gap 3 d is formed between the flange of the cylinder 14 and the SUPPLEMENT 7 7, and the bearing 8 rests on the cylinder flange 15. Between; a pore 11 and a fixed bearing ring 8, a gap is formed (c / j.

With a further increase in load, it is mainly perceived by

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8 because the rigidity of the flange of the cylinder 15 is much higher than the rigidity of the disc springs 19. The design of the support roller 1 eliminates the possibility of overloading the thrust bearings 7 and 8. Due to the small size of the elastic element, it is possible to modernize the existing support rollers 1 without significant structural changes.

The use of the device allows to increase the service life of thrust bearings 7 and 8, thereby increasing the reliability of operation of rotary kilns and their utilization ratio.

This design allows the use of bearings of smaller dimensions and carrying capacity, which reduces the cost of the design of the support roller 1. Practically, the glasses 4 work without this wear. The structures of the glasses 4 are rather complicated and are made according to high degrees of accuracy (as an internal surface that is landing for bearings 3 and outer spherical, which is fitting with respect to bearing housing 5).

The economic effect from the introduction of the device consists in increasing the service life of thrust bearings 7 and 8, replacing them with cheaper ones with lower loading capacity and weight, reducing furnace downtime due to replacing rollers 1 when leaving the bearing assemblies, increasing the service life of the glasses 4.

434226

Formula

the invention

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Claims (3)

1. Roller support of a rotary kiln, containing a roller with an axis mounted in radial bearing housings, thrust subspeers mounted in cylinders with flanges, a disk with openings in which elastic elements are placed, and a ring fixed on the axis, characterized in that, in order to increase the service life of the roller and thrust bearings, it is provided with bushings mounted on an axis on both sides of the ring with openings on which thrust bearings are mounted with the possibility of moving over them, tulok installed upory.s nuts to press the bearings to uprugomu.elementu, and thrust bearings mounted at equally-spaced in a ring to the ratio of the flanges and the cylinder. 2. Roller support p. 1, characterized in that the resilient element is made in the form of cup springs mounted on both sides of the disk with axes placed in the holes of the disk. 3. Roller support according to claim 1, characterized in that the gap between the stop nut and the sleeve end in the unloaded state of the support roller is smaller than the gap between the thrust bearing and the cylinder flange. ten FIG. 2 .2Sf. Kf /pus.S Sch / -G “-, fff