CN2373618Y - Four-row cylindrical roller bearing - Google Patents

Abstract

The utility model relates to a four-row cylindrical roller bearing which is used on heavy equipment for metallurgy, heavy mines, etc. The roller diameters Dw, the roller lengths Ln and the value ranges and the optimum value of the number Z in each circumferential row of eight models and four rows of cylindrical roller bearings are determined by a limit design method. Compared with the original bearing with the same model, the roller diameter and the length are enlarged, the number Z is reduced, and the useful space of a rolling body is enlarged at maximum, so that the rating dynamic load and the service life of the bearing are largely improved. Taking a bearing of FAG524238A for example, the rating dynamic load reaches 21600KN, and the service life is 1.27 times as long as the service life the original bearing with the same model.

Description

Four-line column roller bearing

A kind of four-line column roller bearing belongs to large size bearing.Be mainly used in the heavy equipments such as metallurgy, heavy ore deposit.International classification number F16C.

The four-line column roller bearing in past adopts the product of out-of-date methods design more, and promptly roller diameter is little, and length short number amount is many.Cause the bearing dynamic load rating low, working life is short, and general 3-6 month, damaged in long 6-8 month, make Bearing Consumption many, it is long auxiliary time that roll change consumes accumulation, influences output of a factory, cost.

The purpose of this utility model has provided the novel four-line column roller bearing of 8 kinds of models, adopts the product of this new structure to compare with existing bearing of the same type, and its dynamic load rating improves greatly, and increase working life.

The purpose of this utility model is to adopt following manner to realize: the limit design method that adopts the inventor to initiate proposition, the product structure of design is compared roller diameter D with existing bearing of the same type _wIncrease roller length L _wIncrease, roller is provided with quantity Z at circumferential every row to be reduced.Be that novel four-line column roller bearing structure is as follows: have two outer rings 1,1 or 2 inner rings 5,1 or 3 outer ring spacers 4, every row circumferentially evenly are provided with a plurality of rollers 2 between inside and outside circle, roller supports 8 kinds of model bearing bore diameter d, bearing outside diameter D by retainer 3, the wide B of bearing is respectively the numerical value of sequence number 1-8 in the table 1, it is characterized in that the diameter D of 8 kinds of model bearing rollers 2 _w, the length L n of roller 2, the span that roller 2 is provided with quantity Z at circumferential every row be respectively a group among the sequence number 1-8 in the table 1, promptly value be sequence number 1 or 2 or ... or 8 number range.

Table 1

Sequence number	Bearing boundary dimension (millimeter)			Novel four-line column roller bearing main parameter span (millimeter)
							Bearing bore diameter d	Bearing outside diameter D	The wide B of bearing	Roller diameter Dw	Roller length Ln	Roller quantity Z
	1	160	240	124	20+0.5 -2	20+0.5 -2 -2							27-1 +1 +1
2							260	360	204	26.5+0.5 -2	40+0.5 -2	32-1 +1
	3	480	650	450	46+0.5 -2	86+0.5 -2							36-1 +1
4							480	680	500	55+0.5 -2	94+0.5 -2	32-1 +1
	5	500	870	450	48+0.5 -2	88+0.5 -2							36-1 +1
8							761.425	1079.8	787.4	85+1 -2	155+1 -2	33-1 +1
	7	850	1150	840	80+1 -2	166+1 -2							37-1 +1
8							950	1300	850	96+1 -2	169+1 -2	36-1 +1

For obtaining the optimum efficiency of bearing, promptly dynamic load rating and working life are the highest.The utility model is to the roller 2 diameter D of 8 kinds of model bearings in the said structure feature _w, roller length Ln, roller arrange that at circumferential every row the numerical value of quantity Z gets numerical value in the table 2 respectively.(value of promptly leaving out tolerance in the table 1 is table 2 numerical value) for example: sequence number 2 this model bearings, D _wBe 26.5mm, Ln is 40mm, and Z is 32.Table 2

Sequence number	Bearing boundary dimension (millimeter)			Novel four-line column roller bearing main parameter span (millimeter)
							Bearing bore diameter d	Bearing outside diameter D	The wide B of bearing	Roller diameter Dw	Roller length Ln	Roller quantity Z
	1	160	240	124	20	20							27
2							280	360	204	26.5	40	32
	3	480	650	450	46	88							36
4							480	680	500	55	94	32
	5	500	670	450	48	88							36
6							761.425	1079.6	787.4	85	155	33
	7	850	1150	840	80	166							37
8							850	1300	850	96	169	36

Description of drawings Fig. 1, four-line column roller bearing structural drawing (axially sectional view) Fig. 2, roller 2 shape figure

Embodiment: the four-line column roller bearing of this model of table 1 sequence number 6, have two outer rings 1,2 inner rings 5,3 outer ring spacers 4, every row are circumferentially evenly established a plurality of rollers between inside and outside circle, and roller is supported by retainer 3, and bearing bore diameter d is that 761.425mm bearing outside diameter D is 1079.6mm, the wide B of Z bearing is 787.4mm, it is characterized in that the structural element value of the utility model four-line column roller bearing is: roller 2 diameter D _wBe 85mm, the length L n of roller 2 is 155mm, and roller 2 arranges that at circumferential every row quantity Z is 33, and the structure characteristic of other model of table 1 sequence number 1-8 kind is that the structural element value is all listed in the table 1.

Therefore, the utility model has adopted the limit design method that proposes, superiority structurally is to keep bearing boundary dimension (by inner diameter d, outer diameter D, width B decision) under the constant situation, the utility model is compared with existing product, the shape (by quantity Z decision) that has changed roller simultaneously, the shape of bearing inner race 5, outer ring 1, retainer 3 and relative position have all carried out optimizing and have improved.Its optimization aim is to guarantee that bearing ring and retainer have under the sufficient intensity condition, have enlarged the useful space that roller occupies as far as possible.The effect that produces of optimizing structure thus is that the dynamic load rating of bearing improves greatly, and increase working life.As sequence number in the table 16, bearing designation FAG524238A, dynamic load rating reaches 21600KN, and be 1.27 times of former bearing working life.As sequence number in the table 12, bearing designation FCD5272204, dynamic load rating reaches 2070KN, and be 1.16 times of former bearing working life.

Claims (2)

1. four-line column roller bearing, have two outer rings (1), 1 or 2 inner ring (5), 1 or 3 outer ring spacer (4), every row are circumferentially established a plurality of rollers (2) between inner ring and outer ring, roller is supported by retainer (3), the bearing bore diameter d of 8 kinds of model bearings, bearing outside diameter D, the wide B of bearing are respectively the numerical value of sequence number 1-8 in the table 1, it is characterized in that the diameter D of the roller 2 of 8 kinds of model bearings _w, roller 2 length L n, roller 2 be respectively a kind of in the four-line column roller bearing of sequence number 1-8 in the table 1 in the span that circumferential every row are provided with quantity Z, promptly value is sequence number 1 or 2 or 3 ... or 8 number range.

Table 1 Sequence number Bearing boundary dimension (millimeter) Novel four-line column roller bearing main parameter span (millimeter) Bearing bore diameter d Bearing outside diameter D The wide B of bearing Roller diameter Dw Roller length Ln Roller quantity Z 1 160 240 124 20+0.5 -2 20+0.5 -2 27-1 +1 2 260 380 204 26.5+0.5 40+0.5 -2 32-1 +1 3 480 650 450 46+0.5 86+0.5 -2 36-1 +1 4 480 680 500 55+0.5 -2 94+0.5 -2 32-1 +1 5 500 870 450 48+0.5 -2 88+0.5 -2 36-1 +1 8 761.425 1079.6 787.4 85+1 -2 155+1 -2 33-1 +1 7 850 1150 840 80+1 -2 166+1 -2 37-1 +1 8 950 1300 850 96+1 -2 169+1 -2 36-1 +1

2,, it is characterized in that the diameter D of roller 2 of the four-line column roller bearing of 8 kinds of models by the described roller bearing of claim 1 _w, roller length Ln, the circumferential quantity Z of the every row of roller, be respectively numerical value in the table 2.

Table 2 Sequence number Bearing boundary dimension (millimeter) Novel four-line column roller bearing main parameter span (millimeter) Bearing bore diameter d Bearing outside diameter D The wide B of bearing Roller diameter Dw Roller length Ln Roller quantity Z 1 160 240 124 20 20 27 2 280 360 204 26.5 40 32 3 480 650 450 46 86 36 4 480 880 500 55 94 32 5 500 870 450 48 88 36 6 761.425 1079.6 787.4 85 155 33 7 850 1150 840 80 166 37 8 950 1300 850 96 169 36

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