CN2218037Y

CN2218037Y - Retainerless double-row taped roller bearing

Info

Publication number: CN2218037Y
Application number: CN 95210865
Authority: CN
Inventors: 苏玉达; 养德友; 李兆方
Original assignee: BEIJING BEARING FACTORY
Current assignee: BEIJING BEARING FACTORY
Priority date: 1995-05-18
Filing date: 1995-05-18
Publication date: 1996-01-24
Anticipated expiration: 2005-05-18

Abstract

The utility model provides a double-row conical roller bearing without a spacer ring for rolling mills, composed of a single inner ring, a double-row conical roller, two cages and two outer rings. The spacer ring between two original outer rings is omitted to avoid the problem that the bearing is easy to burn for damage owing to the off-normal windage caused by the error of the spacer ring and mounting error; the two lengthened end surfaces of each of the outer rings are respectively added with an inner annular step to control the stability of the windage of the bearing and to prolong the service life of the bearing. The utility model is suitable for narrow strip rolling mills, cogging mills and rolling mills for sectional materials and wire materials; the utility model can also be used for the shafts with large axial load in industry for machine building.

Description

The cageless double-row conical bearing of milling train

The utility model relates to a kind of improved bearing, and particularly a kind of double-row conical bearing that is used on the rolling mill is applicable to the supporting at roller neck position, and in the rotating shaft of powerful axial load.

Existing used two rollers or four rolled steel machines both at home and abroad are equipped with rolling bearing in its roller neck portion, in order to bear in the operation of rolling, produce radially with axial load, the bearing at this position is called rolling mill bearing.The radial load of roll supports with four-line column roller bearing, and axial load then carries with the biserial taper roller bearing.At present, a kind of internal diameter uses bearing at the milling train of 150～300mm, and the double-row conical bearing of the listed production of domestic Luoyang Beaving Factory is arranged, and marks (as shown in Figure 1) for the 266th page at product sample (1993 compile).In addition, " hophornbeam agree " bearing company (TIMKEN) of the U.S. be the product sample that (ROLLINGMILL EQUIPMENT SUPPLMENT " the 6th page (seeing shown in Fig. 2,3) also marked double-row conical bearing.The structure of this class bearing is formed by an inner ring, two row tapered rollers, two retainers, two outer rings and a spacer ring.It is in order to guarantee the bearing internal clearance, promptly to claim play that spacer ring is set.Milling train uses this finished product bearing, because the outer ring can be separated with other assembled parts of bearing with spacer ring, and milling train is bigger at the consumption of producing the use middle (center) bearing, in being installed, the bearing process very easily takes place because of selecting for use the spacer ring size accuracy of form and position improper, cause play undesired, under the axial live load effect of brute force, just be easy to generate the bearing burnout failure, influence ordinary production, cause damage to work.

The purpose of this utility model provides a kind of milling train with cageless double-row conical bearing, processes inner stopper on the counterface of bearing two outer rings lengthening---and ring-shaped step guarantees normal play with it, with the problem that prevents that bearing from burning easily.

The utility model is achieved in that a kind of internal diameter is at the cageless double-row conical bearing of 150～300mm milling train, be by inner ring 1, two row tapered rollers 2, two retainers 3, two outer rings 4 are formed, on the lengthening end face that it is characterized in that matching two outer rings 4, be processed with inner stopper---interior ring-shaped step, width (degree of depth of inner stopper) a by interior ring-shaped step is 12～16mm, the wall thickness b of ring-shaped step is 6～7.5mm, this just guarantees the play of cageless double-row conical bearing, promptly adds the loop configuration that grows with outer ring 4 and has replaced spacer ring.Guarantee that with this play is normal, can bear big axial load, different bearings has different a, the b value.Be useful on arrowband milling train, blooming mill and section bar, the rod-rolling mill, also can be used in the rotating shaft of powerful axially Dai He in the machinery manufacturing industry.

The utility model has the advantages that: add the loop configuration that grows with the outer ring and replace the spacer ring effect, so just eliminated in the installation because of selecting for use the play error that spacer ring is improper and rigging error caused excessive, avoid bearing to burn phenomenon, and install with the replacing bearing also comparatively convenient.Two rigidity end faces of outer ring cooperate simultaneously, have kept the stability of play precision effectively, and the life-span that also can improve bearing.

Below in conjunction with accompanying drawing the utility model is further described:

Fig. 1 is the bearing arrangement figure that Luoyang Beaving Factory lists.

Fig. 2 is the bearing arrangement figure that lists with " hophornbeam is agree " bearing company.

Fig. 3 is the bearing stereogram of " hophornbeam is agree " bearing company.

Fig. 4 is bearing arrangement figure of the present utility model.

Referring to Fig. 4, the cageless double-row conical bearing of milling train, it is made up of the outer ring 4 of single inner ring 1, two row circle awl rollers 2, two retainers 3, two counterface lengthenings.On the counterface of two outer rings, 4 lengthenings, being processed with inner stopper---interior ring-shaped step, the width of interior ring-shaped step (the inner stopper degree of depth) a is also different with its size of different bearings with annular wall thickness b.Add the ring-shaped step structure that grows with outer ring 4 and replaced spacer ring, with the control play and guarantee the stability of its precision.Make the bearing of numbering 370634A, selecting internal diameter for use is 170mm, and external diameter is 259.5mm, the wide 90mm of bearing, this moment a=12.5mm, b=6mm.When this product was tried out in sky Jian steel rolling one factory, its life-span was improved 1 times more than than existing double-row conical bearing, and it is also very convenient that replacing is loaded and transported, installed in processing.

Claims

1, a kind of internal diameter is at the cageless double-row conical bearing of 150～300mm milling train, it is made up of single inner ring [1], two row tapered rollers [2], two retainers [3], two outer rings [4], on the lengthening end face that it is characterized in that matching in two outer rings [4], be processed with inner stopper---interior ring-shaped step, width a=12～the 16mm of interior ring-shaped step, the wall thickness b=6～7.5mm of interior ring-shaped step constitutes bearing clearance.

2, bearing according to claim 1 is characterized in that different bearings has different a, b value, numbering 370634A, and internal diameter is 170mm, when external diameter is the wide 90mm of 259.5mm, bearing, a=12.5mm, b=6mm.