DE2448515B2 - Storage for rotating drums, such as rotary kilns, tube coolers, or the like, which are inclined towards the outlet end - Google Patents

Description

40

The invention relates to a bearing for rotary drums inclined towards the outlet end, such as rotary kiln, tube cooler or the like, which comprises a plurality of radial bearings and at least one axial bearing for absorbing the axial thrust, which is arranged between the drive ring gear and the or one of the upper radial bearings and consists of at least one in the axial direction of the rotary drum movably mounted in a bearing block ¹ W and a bearing ring associated therewith, firmly connected to the rotary drum, the bearing block being a compact unit with two guide rods extending in the axial direction of the rotary drum, on which the ■> ■ > Bearing for the pressure roller forming bearing body is controlled axially reciprocating.

The radial bearings of such rotary drums, the length of which can be m and more, consist of two or more running rings firmly connected to the rotating drum gen, which are each supported on two rollers, which in turn in bearing blocks resting on the foundation are rotatably mounted. To absorb the axial thrust resulting from the inclination of the rotary drum, which is made from must be provided for technical reasons, it turns out that one or more is used on one Running ring or several pressure rollers each resting on a running ring, which run in the axial direction of the rotary drum be moved slowly back and forth. This back and forth movement serves the purpose of running in (grooving) to avoid the races in the wider rollers. To drive the rotary drum one uses predominantly a mechanical gear, which has a ring gear connected to the rotating drum in a rotationally fixed manner and a motor-driven pinion meshing therewith. To do this, the meshing relationships To make it as inexpensive as possible, the d, T ring gear is placed as close as possible to a radial bearing or arranged at a race, because this is where the deflection occurs the rotating drum rinses the most and perfect concentricity is most likely guaranteed. Does it If the rotating drum is heated, a cooler one is preferred for the arrangement of the ring gear Area of the same, but also avoiding the protruding ends for the reasons given will.

Taking into account the aforementioned aspects, there is thus an axial position for the Pressure roller of the axial bearing between the ring gear or its protective housing and the upper one or a the upper race rings and transversely axially between the two rollers of the adjacent radial bearing; at For example, in a cement rotary kiln with three bearings, the pressure roller is located between the Running ring at the Ofeci infeed and the gear ring of the drive, which is moved close to this, flanked by the two rollers of the raceway at the furnace inlet. This position of the pressure roller does not allow it to be used without it Dismantling at least one roller of the adjacent radial bearing from the usual, one-piece bearing block to expand. Such an expansion is z. B. necessary when the pressure roller is worn or their ball bearings need to be replaced. Removing a roller means a very significant one Deficiency, if you have the effort required as well as the necessary interruption of the around the Watch the ongoing operation of such a system

A one-piece bearing block of known design for the roller of the axial bearing to absorb the axial thrust with inclined rotating drums (DE-OS 19 25 586) has two acute angles against the Longitudinal drum axis inclined slideways, which are designed as piston rods of hydraulic drives and a support for a pressure roller axially supporting the rotary drum via the associated race Take up displaceably, the axis of rotation of the support roller perpendicular to the piston rods is arranged.

In another known storage for the pressure roller (DE-PS 12 91 512) this is rotatable about a vertical axis mounted on an elongated carrier, one end of which is pivotable on a horizontal, is arranged in bearing blocks and the other end on a sprung axle The abutment rests, so that when a predetermined value is exceeded, the associated axial pressure surface mediated force can tilt, with a linkage this tilting movement on with an overload indicator connected control unit transmits.

Even with these two known pressure roller bearings, the pressure roller can only be exchanged if if a roller of the adjacent radial bearing is removed, but for the reasons mentioned is undesirable.

State of the art is also an arrangement (DE-AS 18 10 127) for the longitudinal guidance of rotating drums

such as rotary kilns, drying and cooling drums and the like serving to absorb the axial forces pressure rollers are mounted by means of housings, which by a hydraulic or pneumatic displacement mechanism in the axial direction of the drum and transversely are displaceable to the pressure roller axis, the displacement mechanism in the guide of the pressure roller housing arranged and between the relatively movable parts of the guide of the Pressure roller housing a pressure chamber provided with a bore for supplying a pressure medium is provided, whose axially opposite end faces each of one of the two mutually movable guide parts are formed. In this bearing arrangement, they are the two Housing for the pressure roller receiving round bars supported in two consoles, which in turn on the Foundation or a base plate can be arranged. To remove the pressure roller, in addition to the In this case too, dismantle at least one of the consoles on the relevant »side Roller with its bearings, d. H. so a radial bearing, are removed, so that the disadvantages mentioned above also arise here.

The invention has for its object to be able to expand the axial bearing without parts of a Radial bearings need to be removed.

According to the invention this is achieved in that the Bearing block is divided into two firmly but detachably connected parts, each of which is one Receives the end of both guide rods and the part adjacent to the raceway with one for introduction a support means for the pressure roller is provided in the interior of the bearing block and dimensioned recess both the height of the part and the joint height of the pressure roller and its bearing body are smaller are dimensioned as the clear passage under the raceway. By dividing the bearing block, a Part of it pulled sideways under the raceway of the radial bearing and then the pressure roller be lowered and removed in the same way as the bearing block part without having to the adjacent radial bearing has to be changed or dismantled somewhat. Dividing the pedestal can be done both in the vertical and in the horizontal plane, preferably the parts of the Bearing block but joined together with a vertical parting line, because a horizontal split also: Required height

Since when expanding ότ pressure roller this must be supported and lowered, it is necessary to bring a support means, such as a mechanical or hydraulic jack from the side under them. Thanks to the recess provided in the one bearing block part, this support means can easily be moved under the support roller and just as easily removed again from there.

A preferred embodiment of the, robust in its structure and simple in terms of production technology Bearing block comprises according to the further invention a T-shaped bearing block part and a U-shaped bearing block part, wherein the U-shaped bearing block part has the recess

In the drawing is an embodiment of the storage according to the invention in the form of a Cement rotary tube ofeti axial bearing reproduced. It shows

Fig. 1 is a side view of a cement rotary kiln

in a schematic representation,

F i g. 2 the side view of the axial bearing of the cement rotary kiln according to FIG. 1, drawn in simplified form and FIG. 3 shows a plan view of the axial bearing according to FIG. 2.

According to FIG. 1, the cement rotary kiln has a rotary drum 1 that is slightly inclined to the horizontal known design, which is in three radial bearings, a radial bearing 2 at the furnace entrance, a radial bearing 3 in the furnace center and a radial bearing 4 am

ίο furnace outlet, and a thrust bearing 5 is supported is covered by a drive unit 6 via a pinion 7 and a protective cover 9 Toothed ring 8, which is rotatably mounted on the rotary drum 1, driven in the usual way. Each of the three radial bearings 2, 3, 4 consists of one non-rotatable with the rotating drum 1 connected race 10 and two latter rotatably receiving rollers 11, 12, which are each rotatably mounted in two bearing blocks 13, 14. The bearing blocks 13, 14 are on an im Foundation 16 cemented base plate 15 is arranged. The race 10 of the iVadiallager 2 am The furnace entrance has a double function, which means that it is also the raceway of the axial bearing 5. For this second one Function it is provided with a conical extension 17.

The axial bearing 5 comprises next to the race 10 with 17 a conical pressure roller 18 and one Bearing block 19 The bearing block 19 consists essentially of a T-shaped bearing block part 20, a U-shaped bearing block part 21, a bearing body 22 and the latter two can be displaced receiving support and guide rods 23, 24 together. The pressure roller 18 is on an axis 25 non-rotatably arranged, which in the bearing body 22 by means of ball bearing, not shown, is mounted in a known manner The two support and guide rods 23, 24 are each in a bore 26 in the bearing block part 20 and in a bore 27 in the bearing block part 21 and are each fixed by a locking pin 28 against axial displacement. At one end they each have one

Threaded hole 43 into which an eyebolt 44 can be screwed. On every carrying and Guide rod 23 or 24 is in front of and behind the bearing body 22 each have a sealing collar 29 on it arranged which the ingress of dust into the bearing bores of the bearing body 22 is to prevent. For moving the bearing body 22 on the support and guide rods 23, 24 for the purpose of a Relative movement of the races 10 with respect to their rollers 11, 12 with the mediation of the axis 25 and

V) Pressure roller 18, a hydraulic cylinder-piston system is provided, which consists of a plunger 30 resting axially on the bearing body 22 and a plunger 30 fastened by screws 32 on the bearing block part 20 and via cinei. Hydraulic hose 33 fed with pressure medium

v, cylinder 31 is formed.

The T-shaped bearing block part 20 is with the help of screws 34, the U-shaped bearing block part 21 fastened by means of screws 35 on a base plate 36 which is cemented into the foundation 16. the

M) both bearing block parts 20, 21 are vertical Parting line 37 detachably joined to one another Flanges 38 on the legs 21a, 21b of the are used for the connection Bearing block part 21 and screws 39 which are inserted into the flanges 38 through corresponding bores

t) 5 and in thread! holes in the bearing block part 20 are screwed. The bearing block part 21 has a recess 40 which is dimensioned so large that a Support means for the pressure roller 18 or its

Bearing body 22 can be pushed into the interior of the bearing block 19 under the bearing body 22, for example a hydraulic jack 42 fed via a hydraulic hose 41 (FIG. 2).

Does the pressure roller 18 of the axial bearing 5 have to be removed for any reason, for example because the Ball bearings of their axis 25 have become defective, so first through the recess 40 in the bearing block part 21 through the hydraulic jack 42 inserted into the interior of the bearing block 19 and under the Bearing body 22 brought into position and this is supported by actuating the jack 42 accordingly. As soon as the bearing body 22 together with the axis 25 and pressure roller 18 is caught, the locking bolts are 28 of the support and guide rods 23, 24 released and screwed eyebolts 44 into their threaded bores 43. With the help of the eyebolts 44, the support and guide rods 23, 24 are then moved to the right -

, f pi,

iifrinn

has happened, the jack 42 is operated in the opposite direction and the bearing body 22 sami Axle 25 and pressure roller 18 lowered so far that the upper edge of the pressure roller 18 under the race 10 fre goes. The bearing body 22 with axis 25 and pressure roller 18 is now free for removal and can under the race 10 are removed to the right, for example, it can be placed on a cart and be moved to the side under the raceway 10.

ίο The reinstallation of the pressure roller 18 or installation a new pressure roller 18 takes place in the reverse order.

The progress achieved with the invention consists in the fact that the ring gear of the drive without consideration

ι · -, on the pressure roller of the axial bearing most favorable OrI arranged on the rotary drum and the pressure roller even with large tube mills with pressure roller diameters of more than one meter without dismantling

pulled out and removed. Now the screws 35 are loosened and the bearing block part 21 is also moved to the right under the race 10 through. As soon as this Ό lt / linll> l / in »i!.» ■ • r.Uiot.i ··. ^^.

can be expanded easily and with little expenditure of time if necessary.

1 sheet of drawings

Claims (3)

Patent claims: 1. Storage for rotary drums inclined towards the outlet end, such as rotary kilns, tube coolers Od. The like. Soft several radial bearings and at least one axial bearing for absorbing the axial thrust comprises, which is arranged between the drive ring gear and the or one of the upper radial bearings is and from at least one in the axial direction of the rotary drum movable in a bearing block ι ο mounted pressure roller and one of these assigned, firmly connected to the rotary drum race consists, wherein the bearing block is a compact unit with two in the axial direction of the rotary drum extending guide rods is on which is a bearing body forming the bearing for the pressure roller can be axially reciprocated in a controlled manner is mounted, characterized in that the bearing block (19) in two fixed, but detachable interconnected parts (20,21) is broken down, each of which has one end of both guide rods (23, 24) and the part (2t) adjacent to the raceway (10) with one for introducing a Support means (42) for the pressure roller (18) in the interior of the bearing block (19) dimensioned recess (40) is provided and both the height of this part (21) and the common height of Pressure roller (18) and its bearing body (22) are smaller than the clear passage below the raceway (10). 2. Storage according to claim 1, characterized in that the parts (20, 21) of the bearing block (19) with vertical separating figs (37) ■ · yi are joined together. 3. Storage according to claims 1 and 2, characterized in that c ies (20) of the bearing block parts (20, 21) T-shaped and the other (21) is U-shaped, the U-shaped Lagerbockteii (21) has the recess (40).