DE501139C - Arrangement of bearings to absorb both radial and axial pressure - Google Patents

Description

Arrangement of bearings for absorbing both radial and axial pressure. The invention relates to a particular arrangement for bearings that accommodate both radial and axial pressure especially for roller bearings installed in pairs in the bearing housing.

For heavy, heavily used machines, e.g. B. rolling mills, cement mills and the like, with correspondingly very high bearing loads, is the attachment of roller bearings Often enough load-bearing capacity within the available IZate very difficult. In the case of rolling mills, the diameter is compared to the roll diameter of the roll neck relatively large, so that the roll necks withstand the large pressures, to which they are exposed, can withstand. The one available for the camp Standing space is therefore very limited in the radial direction. Most of the time, so that the Use of bearings with a finite low profile and a wide cross-section is necessary. the Use of rolling bearings is therefore due to the difficulty the. Printing pale to distribute on the bearing or bearings, especially if the journals are under load Bending loads are subjected to very difficult.

Attempts have been made to make the bearing housing in spherical seats, on steel cutting edges or on a part with a spherical surface and a flat bottom. In doing so, however, the following are always to be taken into account: what is always there, more or less large axial forces new difficulties arise. Either must namely a complicated construction to cancel the axial force can be used, or the bearings are exposed to significant overload.

According to the present invention, the bearing housing can freely on the spherical, surface of a single-class part in the housing, which is against another part attached to the tripod or to the roller stand with a flat Surface .supports. Instead of being axially fixed in the center, the housing is Axially fixed as close as possible to the rolling surface to allow the rolling movement takes place with the least possible sliding.

To allow an axial adjustment of the rollers and .the bending To facilitate the roll neck, the bearings are exposed on one side of the rolls built into the housings. Any slip that occurs occurs between well-lubricated and carefully crafted finishes of proportion: large size, and the friction is consequently: insignificant. Furthermore, the outer rings rotate .der Bearings slow in relation to the housing, which makes their axial adjustment significant is facilitated.

In the drawings is an exemplary embodiment of the object of the invention shown. It show: Aibb. i schematically, the distribution of forces in the known Bearing arrangements and Fig. 2 in the case of the bearing arrangement according to the invention, Fig 3 a side view of a niit ler bearing assembly according to the invention Rolling mill make the four-roll mill.

Fig. D. a longitudinal section with a partial front view, Fig. 5 a Side view of a rolling mill also finitely equipped with the new bearing arrangement after the Sechswalzens_vstem and Abib. 6 shows a longitudinal section with a partial front view.

At a bearing, which in a known manner in a on a spherical surface If the bearing housing is installed in a bearing, the forces acting on the bearing are rlie illustrated in fig. The bearing housing is in the axi.a.ler direction in the usual Way by means of a guide pin B rotatably attached, uni the bend cleis roll pin to facilitate. This causes a sliding movement between the heavily burdened ones spherical and flat surfaces. The force P "which eschews the friction the surfaces, causes-the emergence of the bearings acting forces P = and P ,,. The force P reduces the load on the bearing C. while the force P "increases the load on the bearing D. This results in that the bearing L> besides its part of the rare load P also the #l due to the friction caused force P; has to include. There. the force P, is already present, becomes that Bearing D due to the force P;, slightly overloaded.

The distribution of forces on a bearing installed according to the invention acting forces are illustrated in Fig. 2. The force: i is significantly less than the force P1 in Fig. i. As a result, the ILraftP "is lower2, .and the load is distributed more dike between camps 0 and D.

In this case, too, there is an insignificant Gl.eitb ewagurug, if. the rollers adapt to the bending forces. This movement is on everyone Case less than <ler in Fig! B. i illustrated arrangement and will so: ger: in: ger, the closer the: @nor; lnungswei @ se comes to the ideal arrangement, where the radial load and the axial load are recorded at the same point will.

The work rolls i (Fig. 3 and - ¢) work in the usual way against back-up rolls 2. These are in Labern 3, 'those in housings 4 of the stands hz.w. Stand 5 are embedded, gei, agert. The. Consist of self-aligning roller bearings Bearings are installed in pairs on each side of the rollers 2. The inner camp eats # Mounted directly on the tapered roll neck 6, while the outer bearing is on the withdrawal sleeve i is attached. This arrangement allows @lie use of Bearing finitely sufficient load-bearing capacity. To, @ vähr.end at the same time the roll journals get the most suitable shape do best to withstand the bending stresses can.

The housing 4 .sind: provided with recesses 8, which for insert intended for the hardened steel disks 9. are. These discs have a spherical shape Surface with a relatively large radius and are supported with their spherical Surfaces against the flat surface of am-leren hardened steel disks io, which are inserted into the recesses 8. This construction can do that For axial adjustment, roll the housing on the surface of the washer. If if you wish, the disk can also be placed in the framework 5 or in the carriage i i inserted «-ground.

For the purpose of axial adjustment of the upper back-up roll, one of the disks io mounted in a slide. The screw 12 winds the head 1d. ider Adjusting nut 15 surrounding ring adjusted. By turning the Schr.awbe 12, the Slide moves in the axial direction of the rollers with respect to the Rilig 13 and takes at the same time i the disk i o, the housing ¢ and the roller 2 niit. The setting of the lower back-up roll takes place in the same way finite with the exception that claß rlie Washer io rests directly in the stand of the scaffolding and that the screw 12 init. Your Scaffolding rather than having a: ring connected to it.

The housing d. are fastened axially by the discs, which as mentioned above, are inserted into the recesses 8 in the housing. To prevent, that the bearings are destroyed by the large axial loads occurring when the rolls break are the stalil! schei.ben io in that. Carriage i i or ring 23 only attached by means of a narrow flange i j. The parts are dimensioned so that the steel disks torn from their fastening and freed the Gehäti, se a before the axial load becomes so great that it damages the bearings.

The housing is provided with a F.üliruirgszapfen 1ü, -which is connected to the frame 5 and 'the housing in the opposite direction leads so that the disc 9 can roll freely on the disc io.

The use of the invention in rolling mills mach the Sechswalz.ensysteni is illustrated in Figs. In this case each bearing housing is anit two recesses 8 are provided, in which discs 9 are inserted, which in the type described above with the disks io in connection stand. One of the recesses in each bearing housing is, as above with the rolling mills the four-roll system and the other to that of the outer frame Ales stand on the bottom side of the case. The bearing housing of the upper support, wa'Ize hang on. Ears 18, through which a nuenstiick 19. Is pulled i, st. The cross piece 19 is held by hanging iron 20, which: by on the scaffolding or stand ((resting Springs 21 are worn. `Fenn the ears 18 placed between the washers .9 turn, as shown in Fig. 5, I have an ear for each bearing housing (the upper Back-up roller necessary, unra the housing is supported against the two disks 1o and is thus held in: the right position. For the housing: left to the lower support roller ears are not necessary as there is weight of the back-up rolls and lower work rolls It is sufficient to keep the housing in the correct position when idling. The pressure von der Arbeitswale holds the backup rolls against the Seiten -ler during rolling Pressed stand.

When the roll journals flex under the load, the bearing housing winds rotate around an axis E-E which runs through the contact surfaces of the discs. This squeals with an insignificant sliding movement on the panes. The result The force on the bearings resulting from the sliding friction is so small that it is is without any meaning.

The construction. According to the invention is very simple, -Lind only the recesses 8 in the bearing housings and the Atissparungen 22 in the framework need to be edited.

Nevertheless, the invention above only in connection with rolling mills is described, it can of course also be used in other klachines in which the bearings are at the same time a very large radial point and a significant one Axi.al.load have to be absorbed.

Claims (4)

PATI3NTANSPRT1C13R: i. Anorlaung of warehouses for Aufnahine of radial as Axiaildruck, Ge characterized by means (g) for the radial Vbertragung: pressure (P) through rolling bearing of the bearing housing .on a support portion (to) and a Axi.aldruck aufnehnnende device (8 , 10, 11, 23, 17), which is arranged so that the axial pressure (A) is absorbed in a plane whose Aibstan <1 vcun attack, sptin, Ict, rles radial pressure is less than the distance of the bearing center from the point of attack des Radi, aldr @ ticl; -eis. 2. Arrangement for storage for Aufnahine of radial as well as axial pressure according to claim 1, characterized in that the device for irlie transfer of the radial pressure from a part with a spherical surface (9) and a part finite flat surface (io) on which the spherical Surface can roll off. 3. Arrangement for bearings to absorb both radial and axial pressure according to claim 1 and 2, characterized in that the device for transmission of the axial pressure consists of a: hardened steel disc (1o), de in a recess (8) in the bearing housing (l.) A: n the part bearing the bearing housing is inserted. 4. Arrangement for bearings to accommodate radial such as Axi: aldruck according to claim 1, 2 and 3, "characterized in that the partial devices absorb the axial pressure are dimensioned so that (the part transmitting the pressure (1o) when a pressure that eats larger than that which the bearings accommodate without damage can, is automatically disengaged from its attachment.