CN200958527Y - Double-row long-life cylindrical roller bearing for press - Google Patents

Abstract

The utility model provides a double-line conical roller bearing that is used in rolling mill, with a service life, and pertains to the medium, large or extra large bearing, in order to solve the problems existing in original bearing that the rated dynamic load is low, the service life is short, the bearing consumption is great and the accumulated auxiliary time for replacing the roller is long, directly affecting yield of the factory and increasing the cost. The designer has initially created the rolling bearing limit design method to determine and propose 3 models of double-line conical roller bearing. Compared with present bearing, the designed bearing structure is characterized in that both the roller diameter D and the roller length L are increased. The peripheral number Z of the rollers is reduced. While maintaining that the bearing sleeve rim and the retaining support has adequate intensity requirement, the effectively scope occupied by the roller is explored as possible, so that the rated dynamic load value of the bearing is improved and the service life is increased by a large extent.

Description

Milling train long lifetime Biserial cylindrical roller bearing

Present patent application is one divides an application, original application title ' milling train cylindrical roller bearing with long service life ', original applying number 200520032732.5, January 7 2005 original application day.

(1) technical field: the utility model is a kind of roller bearing, belongs to large-scale and extra large size bearing.Be mainly used on iron and steel and the nonferrous metallurgy industry rolling mill.International classification number is F16C.

(2) background technique: the past roller bearing adopts the out-of-date methods design, and the product roller diameter of design is little, and length is short, bearing load rating value is low, and working life is short, has increased the consumption of bearing, also extend auxiliary times such as roll change, directly influenced the output of steel mill and caused cost to increase.

(3) summary of the invention: the utility model proposes the milling train long lifetime Biserial cylindrical roller bearing of 3 kinds of models, it is low that its purpose solves in the above-mentioned old design roller bearing load rating value exactly, the problem that working life is short.

The utility model is to adopt the inventor to initiate " limit design method for rolling bearing " of proposition, and the bearing structure of design is compared with existing similar bearing, and roller diameter Dw increases, and roller length L increases, and roller is provided with quantity Z at circumferential every row to be reduced.

The technological scheme that adopts is as follows:

Milling train long lifetime Biserial cylindrical roller bearing, have a biserial outer ring 1a and a biserial inner ring 4b, establish a plurality of rollers 2 between inside and outside circle, and support the bearing bore diameter d of 3 kinds of model bearings by retainer 3, bearing outside diameter D, bearing width T (B) is respectively the numerical value of table 1 sequence number 1-3, it is characterized in that 3 kinds of model bearing roller diameter Dw, roller length L, every number of columns Z span is respectively the number range of table 1 sequence number 1-3.

Table 1

Sequence number	Bearing boundary dimension (millimeter)			Biserial cylindrical roller bearing structural element span (millimeter)
							Bearing bore diameter d	Bearing outside diameter D	Bearing width T (B)	Roller diameter Dw	Roller length L	Roller quantity Z
	1	280	380	220	23+0.5 -2	30+0.5 -2							37-1
2							560	820	258	70+0.5 -2	100+0.5 -2	30-1
	3	630	850	218	48+0.5 -2	84+0.5 -2							46-1

For obtaining the optimum efficiency of Biserial cylindrical roller bearing, the roller diameter Dw of 3 kinds of model bearings in the table 1, roller length L, the every number of columns Z of roller gets numerical value in the table 2 respectively, promptly leaves out the numerical value of the nominal size after the tolerance in the table 1.

Table 2

Sequence number	Bearing boundary dimension (millimeter)			Biserial cylindrical roller bearing structural element value (millimeter)
							Bearing bore diameter d	Bearing outside diameter D	Bearing width T (B)	Roller diameter Dw	Roller length L	Roller quantity Z
	1	280	380	220	23	30							37
2							560	820	258	70	100	30
	3	630	850	218	48	84							46

The utility model beneficial effect: this cylindrical roller bearing with long service life, keeping under the constant situation of boundary dimension, with former same model bearing ratio, roller diameter Dw increases, and roller length L increases, and roller is provided with quantity Z at circumferential every row to be reduced, be that retainer shaft bearing ring and retainer have under enough requirement of strength conditions, as much as possible excavate the useful space that roller occupies, the dynamic load rating value is improved, increase substantially working life.

(4) description of drawings

Fig. 1 milling train long lifetime Biserial cylindrical roller bearing

Fig. 2 roller 2 shape figure (being used for solid cage 3)

(5) embodiment

Embodiment: the biserial cylinder is seen Fig. 1, Fig. 2

The long lifetime Biserial cylindrical roller bearing of sequence number 2 in the table 2 has a biserial outer ring 1a, a biserial inner ring 4b, establishes a plurality of rollers 2 between inside and outside circle, and roller is supported by retainer, and retainer adopts solid cage 3 here.Bearing bore diameter d is 560mm, and bearing outside diameter D is 820mm, and bearing width T (B) is 258mm, and the roller diameter Dw of the bearing of determining with limit design method is that 70mm, roller length L are that at circumferential every row quantity Z to be set be 30 for 100mm, roller.Span to other model (two kinds) structural element is listed in table 1 sequence number 1～3.

Claims (2)

1. milling train long lifetime Biserial cylindrical roller bearing has a biserial outer ring (1a) and a biserial inner ring (4b); Establish a plurality of rollers (2) between inside and outside circle, and support by retainer (3), the inner diameter d of 3 kinds of model bearings, bearing outside diameter D, bearing width T (B) is respectively the numerical value of table 1 sequence number 1-3, it is characterized in that 3 kinds of model bearing roller diameter Dw, roller length L, every number of columns Z span is respectively the number range of table 1 sequence number 1-3

Table 1 Sequence number Bearing boundary dimension (millimeter) Biserial cylindrical roller bearing structural element span (millimeter) Bearing bore diameter d Bearing outside diameter D Bearing width T (B) Roller diameter Dw Roller length L Roller quantity Z 1 280 380 220 23+0.5 -2 30+0.5 -2 37-1 2 560 820 258 70+0.5 -2 100+0.5 -2 30-1 3 630 850 218 48+0.5 -2 84+0.5 -2 46-1

2. by the described Biserial cylindrical roller bearing of claim 1, it is characterized in that the roller diameter Dw of 3 kinds of model bearings, roller length L, the every number of columns Z numerical value of roller is respectively numerical value in the table 2,

Table 2 Sequence number Bearing boundary dimension (millimeter) Biserial cylindrical roller bearing structural element value (millimeter) Bearing bore diameter d Bearing outside diameter D Bearing width T (B) Roller diameter Dw Roller length L Roller quantity Z 1 280 380 220 23 30 37 2 560 820 258 70 100 30 3 630 850 218 48 84 46

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