Slide bearings type I for particularly high loads and intermittent operation
Decades of experience, new research findings, long years of tests and the knowledge of the requirements in general engineering and plant con struction form the foundation for the design and manufa clure of the RENK Slide Bearings. We systematically developed our approved design "I" für particularly high loads and intermittent operation. All bearings of this design have similar features: Heavy, compact bearing hous ings, low friction losses and operating temperatures with increased operational safety, due to short running surfaces. The spherically seated shells eliminate pressure concentra tion, at the ends of their bore, caused by installation inaccu racies. Efficient lubrication and intensified heat dissipation through optimum conduction of the lubricating and cooling oil flow. To meet the requirements that are being made to this design, the lining of the shells is man ufactured from only high quali ty whitemetals.
Design and function
The RENK I bearing was designed tor universal applica tion under hard and hardest service conditions. Minor modifications of the bearing shells and housings kept on stock with only a few exceptions permit their use not only with natural cooling but also with water cooling and lubrication by circulating oil. As all components are inter changeable, prompt supply of spare parts is assured. Housings The rigid, heavy duty cast iron housing with ground joint and pedestal faces guarantees good distribution of forces under radial and axial load conditions. The housings are equipped with a crush proof oil level indicator and comprise a tight cover that can be screwed down in the upper part. As a standard, the bearing pedestal comprises two big oil drain holes behind overflow chambers which even when operated with oil circulation lubrication assure emergency run by means of the fixed oil ring. The pedestal bottom has cast in channels which can be covered by a plate thus per mitting the use of the bearing for water cooling without hav ing to change the installation height of the bearing. Hooks cast to the bearing pedestal facilate installation. Seals Considering the range of application of I bearings they are equipped with felt or tal low cord seals, respectively. In extreme dusty or sandladen environments grease seals can be used. Also, labyrinth seals (contactless) can be used tor higher speeds.
2
Slide bearing ISNL (Fig. 1) Bearing shells The I bearing shell is spheri cally seated in the housing. This means uncomplicated assembly, as well as suitability for high, dynamic and shock loads, both radial and axial. The wide spherical seal assures good heat transfer from shell to housing. The tol erance range of the seal is such that shells can be exchanged without subse quent adjustment work. The shell consists of a stable cast iron body lined with RENKmetal therm V6 (Ieadbased bearing metal) without intermediate layer. Therefore, in case of emer gency, repair work can be done locally. Locating and non Iocating bearings are equipped with identic bearing shells. Normally, the bore is of plain cylindrical shape, in special cases, however, it can be of two Iobe (Iemon) shape. Small thrust loads are taken up by plain shoulders of the central collar. For higher thrust the shoulders will have oil pockets. For very high thrust loads we recommend to use type I . . A
ISNL (Fig 2) equipped with tilting RD pads in the thrust part. Should this type apply, please contact us. Oil supply Self contained lubrication by fixed oil ring. The oil scraper arranged at the highest point deflects the oil which returns over the outer surface of the shell into the oil pockets (fig. 5). The fixed ring lubrica tion can be used tor peripheral oil ring speeds of approx. 13.5 m/s. For extremely slow speeds, as for instance when turning with auxiliary drive, an oil scoop is used instead of the fixed oil ring; the chambers of the oil scoop raise the oil to the high est point and then pour it into the bearing shell. The oil scoops contain double cham bers and are therefore inde pendent from the direction of rotation. Oil scoop/oil ring can be combined with the stripper.
ISZL / F (Fig. 3) A circulating oil system can be used not only in addition to oil ring lubrication, but also as the only means of lubrication. The hydrodynamic lubrication principle is maintained, as the oil (pressureless) enters the bearing on top and flows to the sliding surfaces via the oil pockets. Pressure, tempera ture and flow control instru ments fall within users' scope of supplies. Solutions can be offered upon request.
Heat dissipation Natural cooling. In most appli cations the generated heat can be dissipated by natural cooling (radiation and convec tion). Should this not be suffi cient, water cooled I bearings are used (types ISW, ILW).
ISNA (Fig. 4) Water cooling In case of bearings arranged for water cooling, the cooling channels in the external bot tom face of the oil chamber are closed with a cover plate. Due to the compact design of the bearings with short dis tances between the zone of frictional heat generation (Iubricating gap) and the cool ing channels of large cross sections, the circulating water dissipates a considerable amount of heat from the oil which the oil ring keeps in constant circulation.
tion with external cooling must be used (type 182.). The vari able inlet for pressureless oil is situated in the upper part of the bearing. From that point the bearing shell is supplied with the quantity of oil required for cooling and lubri cation. Large outlet bores assure troublefree oil drain, provided the oil return line is correctly laid.
Sea water is not suited for cooling. Cooling by circulation oil. Should the heat generated in the bearing exceed certain values, oil circulation lubrica
Fixed ring lubrication (Fig. 5)
3
Dimensioning
When customers state service conditions, each bearing to be supplied by us will be dimen sioned or recalculated resp., on the basis of hydrodynamic and thermic calculations. The input values e. g. speed, load ing in function of magnitude and direction, class of lubri cant and ambient temperature form the binding data for the calculation of service behav iour. For this reason, we request you to give the exact values asked for in our form "Enquiry for Slide Bearings". Decisive features for opera tional safety are the bearing temperature and the minimum oil film thickness. To allow users a preselection in the project stage already, the loads in function of speed given on pages 10 and 11 will assure safe operation when using an oil of the prescribed viscosity. In the margin we state the cal culation process and the fac tors for a rough calculation of the oil quantity required for lubrication by circulating oil.
Data for the calculation of the cooling oil quantity for ISZ bearings (approximate calculation) Determination of
Sommerfeld coefficient
So = c1
Dimension [N] Pa . s . [min 1]
F η t l . n . 1000
Quantity of cooling oil for So < 1 with oil ring
VR = c4
VR = c2
without oil ring
√ F . n3 . η t l . 10 7 3 . ∆ töl √ [N] . [min 1]3 . Pa . s . 10 7
l/min =
√ F . n3 . η t l . 10 7
3.K
3 . ∆ töl
Quantity of cooling oil for So > 1
VR = c5
with oil ring
⎛ n ⎞ ⎝ 1000 ⎠
2
. η t l . 1000
3 . ∆ töl l/min =
without oil ring
VR = c3
⎛ n ⎞ ⎝ 1000 ⎠
2
⎛ [min 1]⎞ ⎝ 1000 ⎠
2
. Pa . s . 1000 3.K
. η t l . 1000
3 . ∆ töl
∆ töl = difference between oil inlet and oil outlet temperature On request, we carry out the computer calculation (free of charge), if you supply the necessary data (like radial load, speed etc.) by filling in our questionnaire “RENK Slide Bearings”.
Factors for ISZ bearings Size
10 14 18 22
28
34
40
46
52
4
Formula
Shaft dia. D [mm]
Factor c1
Factor c2
Factor c3
Factor c4
Factor c5
100
22,20
0,667
1,412
0,887
1,882
110
16,73
0,766
1,872
1,021
2,495
125
13,00
1,030
2,841
1,373
3,787
140
9,39
1,218
3,957
1,624
5,275
160
5,50
1,587
6,749
2,115
8,996
180
3,91
1,887
9,507
2,515
12,673
200
3,72
2,250
11,609
2,999
15,475
220
2,78
2,598
15,484
3,463
20,640
240
1,73
3,297
25,008
4,395
33,335
260
1,72
3,718
28,341
4,956
37,779
280
1,38
4,161
35,205
5,547
46,928
300
0,96
4,947
50,213
6,594
66,934
320
0,96
5,438
55,271
7,249
73,676
340
0,81
5,951
67,356
7,933
89,786
360
0,60
6,833
87,405
9,109
116,511
380
0,51
7,427
103,054
9,900
137,371
400
0,44
8,022
119,770
10,693
159,653
420
0,42
9,061
139,475
12,078
185,925
440
0,36
9,740
160,230
12,983
213,586
460
0,32
10,394
183,711
13,855
244,980
480
0,23
12,215
258,933
16,283
345,158
500
0,21
12,954
284,614
17,268
379,390
520
0,23
13,759
284,614
18,341
379,390
Technical Information
The loads stated on pages 10 and 11 are maximum values. In order to obtain the admissi ble loads at different operating conditions, the following indi cations have to be considered: 1.
friction clutch is operated. With locating bearings "F" thrust loads up to 6 % of the Fu values can be accomodated. In such a case, please enquire. For higher thrust loads: Variant "A". Please enquire.
Direction and magnitude of load 2.
2.1 2.2 2.3 2.4 2.5 2.6
Operating conditions The admissible loads according to para 1 are valid tor: rotating shafts regular service ambient and shaft tempe rature 15 to 250 C erection on bad plate They are NOT valid for: reversal duty (short time reversing) irregular service with shock loads
Bores and appropriate shafts 3.1 All I bearings are manu factured with a bore toler ance D 9 to ISO. 3.2 The admissible radial loads according to para 1 are valid for shafts with a tolerance h 6 to h 8, cen tre line average height (C.L.A.) = 0,8 µm.
Classification Bureaux or directions for special requirements have to be considered.
"Instructions tor Installation, Operation and Maintenance", available on request.
6.
Loads at speeds not contained in the tables 6.1 Lower speeds can be admitted in some cases, with use of special oil conveying devices (oil scoop). Please enquire. 6.2 Higher speeds can be admitted, if the bearings are connected to an oil circulation system dissi pating the heat (type ISZ). Please enquire. 7.
Installation and mainte nance When using "I" type bear ings, please observe our "General instructions tor the application of RENK Slide Bearings" and the
3.
1.1 Radial load within the white field: the tabulated Fu, Fo val ues are applicable. 1.2 Radial load within the black field: 30 % of the tabulated Fu values are admissible.
4. Lubrication 4.1 Any mineral oil is suitable. (Preferably inhibited against oxidation, corro sion and foaming.) 4.2 The viscosity depends R.P.M. and loading. The required viscosities are indicated in the tables on pages 10 and 11. 5.
1.3 in axial direction: the admissible loads on the guide bearing are 3 % of the tabulated Fu values. A higher load can be admitted tor a short time, e. g. when a mechanical
Admissible bearing temperature 5.1 To prevent premature oxi dation of lubricant, the maximum bearing temper ature of 80°C should not be exceeded. 5.2 Regulations of
c Type d Series
I ⎧ ⎨ ⎩
L S
⎧ N Z ⎪ ⎩ W
natural cooling lubrication by oil circulation with external oil cooling water cooling
⎧ L ⎨ F ⎪ A ⎩
non locating or guide bearing locating bearing locating bearing with RD thrust pads (tilting)
e Heat dissipation ⎨
f Thrust surface
light series heavy series
Example for quoting a complete bearing
cd e f I L N L 11 110 Slide bearing type I, light series, with natural cooling, non locating or guide bearing, size 11, bore 110 mm dia.
5
Dimensions of bearings
Type IS..
Dimensions in mm
Size
Shaft dia. D I..F/I..L
10
14
18
22
28
34
40
46
b1
b2
d1
d2
d3
d4
e1
e2
e3
e4
e5
e6
h1
h2
h3
h4
l1
I..A
100 110
125 140
160 180
200 220 240
220
260
240
280
260
300
280
320
300
340
320
360
340
380
360
400
380
420
400
440
420
460
440
[kg]
180
290
G1¼
G 3/8
G 3/8
M 24
380
100
102
22
35
30
170
345
20
60
460
195
335
G1¼
G 3/8
G 3/8
M 30
450
110
135
23
40
30
195
390
20
70
560
250
380
G1½
G½
G½
M 36
540
130
142
26,5
50
30
230
465
24
80
660
310
430
G2
G½
G½
M 42
630
170
178
38
60
30
280
560
24
100
790
370
490
G2½
G¾
G½
M 42
720
210
175
43
70
36
330
666
26
120
860
500 520
6
115
162 158
260 255
435 430 730 690 660 1100
400
560
G3
G1
G½
M 48
810
230
195
50
75
42
380
770
28
125
960
1070 1035 1600
430
630
G3
G1
G½
M 48
900
240
205
55
75
42
450
882
28
125
1060
1560 1510 2400
480
740
G4
G1¼
G½
M 56
1020
280
245
60
90
48
520
1030
28
145
1230
2350 2290
480 52
weight
3580 530
850
G4
G1¼
G½
M 64
1160
320
300
60
95
48
600
1180
28
160
1400
3500 3420
Type IL..
Dimensions in mm
Size
Shaft dia. D
b3
b4
d5
d6
e7
e8
e9
e10
h5
h6
h7
h8
l2
weight [kg]
10
14
18
22
100 110
125 140
160 180
200 220
150
290
M 24
G 3/8
370
—
107
22
165
340
20
50
470
195
335
M 30
G 3/8
450
—
132
23
200
395
20
70
560
250
380
M 30
G½
540
130
142
35
250
485
24
70
660
310
430
M 36
G½
630
170
163
40
300
580
24
95
760
For enquiries and when ordering please state:
please enquire and state: 4.1 application
1.
Denomination of bearing
2.
Size of bearing and bore (shaft diameter)
3.
For locating bearings: state whether collar of shrunk on type, rough or finish machined
4.
In cases which are beyond the load tables,
4.2 direction of load and sense of rotation of shaft (Sketch)
110
155 150
240 235
425 420
(probable radiation) 4.6 cooling water a) temperature (°C) b) type of water (fresh water, natural or purified)
4.3 load (N) (state whether permanent or shock Ioad, probable peak loads) 4.4 R.P.M. 4.5 ambient temperature (°C)
7
Dimensions of Oil rings, collars and shaft collars
ISN ISZ ISW
ILN ILW
Dimensions in mm Shaft Size
dia.
Weight b5
b6
d7
d8
r1
D
Split oil ring (non locating bearing)
10 14 18 22
100
25,8
24
165
125
27,8
26
180
150
140
29,8
28
200
170
160
35,8
34
230
195
180
37,8
36
250
215
270
240
300
260
110
200 220
39,8
38
39,8
38
240 28
260
46,5
470
Collar (1), shrunk on type (locating bearing)
46,5
540
56,5
610
520
Shaft collar, forged on type (locating bearing)
Collar (2), shrunk on type (locating bearing)
8
390
5
460
5
530
5
550
480 500
5
510 59,7
460 52
305
480
420 440
5
440 49,8
400 46
5
410
360 380
5
370 49,8
340 40
5
325
300 320
135
285 370
280 34
125
575 59,7
56,5
680
595 615
5
Collar 1
Collar 2
kg
kg
Oil ring kg
2,6
1,8
2
2,3
1,4
1,7
2,8
1,6
2,5
3,7
2
3
6
3,2
4,7
7
3,7
5,6
8
3,6
6,8
10
5,3
8,5
19
13
17
11
16,4
14
8
39
24
35
20
30,5
32
16
26,7
48
28
30
45
23
26
40
18
24,5
70
39
44
64
32
40
57
25
36
84
46
50,5
77
38
47
69
30
43,5
14,3 12 33,5
ISNA ISZA ISWA
⎫ ⎬ ⎭
as locating bearing for high thrust loads
Dimensions in mm
Size
Shaft dia.
b7
b8
40
175
d9
d10
d11
r2
r3
2,5
10
2,5
10
2,5
10
2,5
10
D 220 28
240
235
260 300
200
210
440
339,7 540
395
400 420
375
260
435 455
359,7 379,7
415 60
299,7 319,7
355 60
380 46
279,7 470
335
340 360
315
239,7 259,7
295 50
320 40
219,7 360
275
280 34
255
399,7 620
419,7 439,7
Section A
Section B
9
Admissible loads and speeds *) Type ILN/ISN
Speed (R.P.M.)
Shaft Size
dia.
5
10
20
40
80
D
100
125
160
200
250
315
400
500
630
800
1000
1250 1600
Admissible load Fu and Fo in [N]
100
44700
60200
60200
60200
60200
60200
60200
60200
60200
60200
59300 51600 41300 29200 21200 16500
110
52900
66200
66200
66200
66200
66200
66200
66200
66200
66200
64300 51500 39700 28400 20600 14200
125
78000
91700
91700
91700
91700
91700
91700
91700
91700
90500
78600 62900 44500 32800 23600
140
96000 102000 102000 102000 102000 102000 102000 102000 102000
96000
78500 62000 42200 30900 21800
10
14
160
133000 133000 133000 133000 133000 133000 133000 133000 131000 114000
91300 64500 45500 33000
180
144400 148750 148750 148750 148750 148750 148750 148750 142000 113000
89000 61600 42500
18
200
127000 171000 171000 171000 171000 171000 171000 171000 171000 171000 136500 107500 73500 52300
220
150000 188000 188000 188000 188000 188000 188000 188000 188000 171700 134000 102000 71500 50900
240
219000 255500 255500 255500 255500 255500 255500 255500 255500 215000 165000 121000 84000
260
253000 276500 276500 276500 276500 276500 276500 276500 276500 213500 162000 116000 83000
280
281000 298000 298000 298000 298000 298000 298000 298000 275000 212500 157500 112000 79000
300
367000 367000 367000 367000 367000 367000 367000 367000 307000 248000 173000 124000
320
390000 390000 390000 390000 390000 390000 390000 390000 312000 237000 167000 119000
340
413000 413000 413000 413000 413000 413000 413000 390000 307000 230000 163000 115000
360
476500 476500 476500 476500 476500 476500 476500 430000 347000 256000 174000 125000
380
515000 515000 515000 515000 515000 515000 515000 435000 350000 243000 169000 124000
400
403000 542500 542500 542500 542500 542500 542500 542500 434000 341000 236000 168000 121000
420
486000 630000 630000 630000 630000 630000 630000 594000 468000 360000 258000 176000
440
528000 660000 660000 660000 660000 660000 660000 603000 482000 358000 254000 177000
460
571000 690000 690000 690000 690000 690000 690000 592000 475000 335000 248000 173500
480
750000 875000 875000 875000 875000 875000 875000 725000 575000 412500 290000 200000
500
806000 910000 910000 910000 910000 910000 910000 728000 550000 403000 286000 208000
520
875000 945000 945000 945000 945000 945000 945000 730000 555000 387000 276000 202000
22
28
34
40
46
52
VG 150
VG 100
VG 68
VG 32
Recommended lubricants in ISO VG viscosity grades
*) Admissible bearing load for type I...A upon request
10
Admissible loads and speeds *) Type ILW/ISW
Speed (R.P.M.)
Shaft Size
dia.
5
10
20
40
80
D
100
125
160
200
250
315
400
500
630
800
1000
1250 1600
Admissible load Fu and Fo in [N]
100
44700
60200
60200
60200
60200
60200
60200
60200
60200
60200
59300 51600 41300 31000 25000 17900
110
52900
66200
66200
66200
66200
66200
66200
66200
66200
66200
64300 51500 41500 32100 24500 17000
125
78600
91700
91700
91700
91700
91700
91700
91700
91700
90500
78600 62900 49800 38500 28300
140
96000 102000 102000 102000 102000 102000 102000 102000 102000
96000
78500 63500 49000 36400 26200
10
14
160
133000 133000 133000 133000 133000 133000 133000 133000 131000 114000
91300 72200 53200 40000
180
148750 148750 148750 148750 148750 148750 148750 148750 142000 113000
91500 71000 51000
18
200
127000 171000 171000 171000 171000 171000 171000 171000 171000 171000 136500 107500 87000 64500
220
150000 188000 188000 188000 188000 188000 188000 188000 188000 171700 134000 107500 85800 72500
240
219000 255500 255500 255500 255500 255500 255500 255500 255500 215000 165000 135000 102000
260
253000 276500 276500 276500 276500 276500 276500 276500 276500 213500 170000 134000 99000
280
281000 298000 298000 298000 298000 298000 298000 298000 275000 212500 170000 136000 97000
300
367000 367000 367000 367000 367000 367000 367000 367000 307000 248000 194000 150000
320
390000 390000 390000 390000 390000 390000 390000 390000 312000 237000 195000 145000
340
413000 413000 413000 413000 413000 413000 413000 390000 307000 248000 193000 140000
360
476500 476500 476500 476500 476500 476500 476500 430000 347000 276000 208000 155000
380
515000 515000 515000 515000 515000 515000 515000 435000 350000 272000 206000 148000
400
403000 542500 542500 542500 542500 542500 542500 542500 434000 341000 271000 202000 147000
420
486000 630000 630000 630000 630000 630000 630000 594000 468000 378000 306000 216000
440
528000 660000 660000 660000 660000 660000 660000 603000 482000 377000 302000 216000
460
571000 690000 690000 690000 690000 690000 690000 591000 475000 384000 295000 212000
480
750000 875000 875000 875000 875000 875000 875000 725000 575000 463000 350000 250000
500
806000 910000 910000 910000 910000 910000 910000 728000 527000 460000 346000 246000
520
875000 945000 945000 945000 945000 945000 945000 730000 585000 455000 340000 234000
22
28
34
40
46
52
VG 150
VG 100
VG 68
recommended lubricants in ISO VG viscosity grades
*) Admissible bearing load for type I...A upon request
11
Sales Organisation
Headquarters and Manufacturing Plant
RENK AKTIENGESELLSCHAFT Werk Hannover Weltausstellungsallee 21 D 30539 Hannover Phone: +49 (5 11) 86 01 0 Fax: +49 (5 11) 86 01 288 Email: info.hannover@renk.biz Internet: www.renk.biz
Sales Agencies Manufacturing Plant
OMEGA RENK BEARINGS PVT. LTD. Anand Nagar, Raisen Road Bhopal 462 021 India Phone: (91 7 55) 5 28 45 61 Fax: (91 7 55) 2 75 16 26 Email: omtec@sancharnet.in Internet: www.omegarenk.com
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RENK Corporation 304, Tucapau Road 29334 Duncan S.C. USA Phone: (1 8 64) 4 33 00 69 Fax: (1 8 64) 4 33 06 36
COFICAL RENK MANCAIS DO BRASIL LTDA. Rodovia BR 280, km 54 Em frente ao Parque Municipal de Exposições CEP 89270 000 Guaramirim SC Brasil Phone: (55 4) 737 36 400 Fax: (55 4) 737 36 499
MAN B&W (Japan) Ltd. RH Division; Fuji Building (Room 121) 3 2 3 Marunouchi Chiyoda ku, Tokyo 100 0005 Japan Phone: (81 3) 3215 1310 Fax: (81 3) 3284 0867
We reserve the right to changes made in the interests of technical improvement.
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