The Design of Rolling Bearing Mountings

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Output Antriebs-Hohlwelle hollow shaftZwischenwelleIntermediate shaftEingangswelleInput shaft54: Spur gear transmission for the underground or subway77 FAG
55 Bevel gear transmission for city trainsWith a so-called two-axled longitudinal drive in undergroundand metropolitan vehicles the traction motor(usually direct current motor) is arranged in the bogiein the direction of travel. A bevel gear transmission isflanged onto both sides of the motor's face. The driveunit firmly attached to the bogie frame is elasticallysupported by the wheel sets. The drive power is transmittedfrom the pinion shaft to the hollow ring gearshaft and then via rubber couplings to the drivingwheel shaft. This drive design leads to good runningbehaviour and moderate stressing for the traction motor,transmission and track superstructure.Machining tolerancesCylindrical roller bearing: Shaft m6, housing M6Tapered roller bearing/motor end:Shaft m6, sleeve M6Tapered roller bearingwith mantle ring: Shaft m6, ring R6 (S7)Tapered roller bearingof ring gear shaft: Shaft n6 – p6housing K6 – M6The axial clearance of the tapered roller bearing pairdepends on gearing and the operating conditions.Dimensioning, bearing selectionMean torques and speeds (hourly torque, hourlyspeed) are calculated from the tractive force – surfacespeed diagram and the time shares for the various runningconditions. By means of the gearing data thetooth loads of the hypoid bevel gear step are calculatedand, depending on the lever arms, are distributed tothe bearing locations.A life of 20,000 to 30,000 hours is assumed for bearingdimensioning. Assuming an average travel speed thiscorresponds to 1.2 – 1.3 million kilometers.To check the static safety of the bearings the maximumtorque (slippage torque) is taken as a basis.LubricationOil sump lubrication provides the transmission bearingswith lubricant. The flinger oil is conveyed via thering gear from the oil sump and fed directly to thetransmission bearings via oil collecting bowls and supplyducts. The special driving conditions for city trainsdemand highly doped oils which are resistant to heatand corrosion.Pinion shaftA single-row cylindrical roller bearing FAGNJ2224E.M1A.C3 (120 x 215 x 58 mm) is mountedas a floating bearing at the pinion end. It accommodatesthe high radial loads. The machined cage of thebearing is guided at the outer ring. The bearing has theincreased radial clearance C3 since the bearing ringshave a tight fit on the shaft and in the housing. Two taperedroller bearings FAG 31316 (80 x 170 x 42.5mm) are used as locating bearings. They are mounted inpairs in O arrangement. The bearing at the motor endaccommodates the radial loads as well as the axial loadsfrom the gearing; the other tapered roller bearing onlyaccommodates the axial loads arising during a changein direction of rotation. A minimum bearing load is arequirement in order to avoid harmful sliding motion(slippage) and premature wear. The cups of thetapered roller bearings are therefore preloaded withsprings.Ring gear shaftThere is a tapered roller bearing with the dimensions210 x 300 x 54.5 mm at each side of the ring gear.Both bearings are adjusted in X arrangement.55: Bevel gear transmission for city trainsFAG 78
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PrefaceThis publication presents de
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ContentsExample Title . . . . . . .
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assembly is contracted. Thus the ra
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Current insulationWhere converter c
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4 Electric motor for domestic appli
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PulleyDrum5: Drum mounting of a dom
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6: Rotor bearing arrangement of a v
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7: Rotor bearing arrangement of a m
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9-18 Work spindles of machine tools
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10 NC-lathe main spindleOperating d
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13 High-speed motor milling spindle
Page 28 and 29: 15 Vertical high-speed milling spin
Page 30 and 31: 17 External cylindrical grinding sp
Page 32 and 33: 19 Rotary table of a vertical lathe
Page 34 and 35: 21 Rough-turning lathe for round ba
Page 36 and 37: 22: Flywheel bearing arrangement of
Page 38 and 39: 24 Double-shaft circular sawOperati
Page 40 and 41: Rollbending bearingsA counterbendin
Page 42 and 43: 27 Spur gear transmission for a rev
Page 44 and 45: The effects of basing the bearing d
Page 46 and 47: 29 Bevel gear - spur gear transmiss
Page 48 and 49: 31 Worm gear pairOperating dataInpu
Page 50 and 51: at least normal cleanliness (contam
Page 52 and 53: 33 Manual gearbox for trucksOperati
Page 54: 34 Final drive of a passenger carOp
Page 57 and 58: Driven and non-steered rear wheel36
Page 59 and 60: 38 Steering king pin of a truckA va
Page 61 and 62: 40 Water pump for passenger car and
Page 63 and 64: 42 Axle box roller bearings of an I
Page 65 and 66: 43-44 UIC axle box roller bearings
Page 67 and 68: 45Axle box roller bearingsof series
Page 69 and 70: 47Axle box roller bearingsof the Ch
Page 71 and 72: 48 Axle box roller bearings for an
Page 73 and 74: 50Axle box roller bearingsaccording
Page 75 and 76: 52Universal quill drivefor threepha
Page 77: 54 Spur gear transmission for the u
Page 81 and 82: 56- 57 Spherical roller bearings as
Page 83 and 84: 60 Spade-type rudderDesignThe slewi
Page 85 and 86: 61-62 Ship shaft bearings and stern
Page 87 and 88: 63-64 Ship shaft thrust blocksThe t
Page 89 and 90: 64a: Complete ship shaft thrust blo
Page 91 and 92: 65 RefinersWood chips from the wood
Page 93 and 94: 66 Suction rollsSuction rolls are f
Page 95 and 96: 68 Dryer rollsThe remaining water i
Page 97 and 98: 69 Guide rollsGuide rolls guide, as
Page 99 and 100: 70 Calender thermo rollsThe paper p
Page 101 and 102: 71 Anti-deflection rollsAnti-deflec
Page 103 and 104: 73 Run wheel of a material ropewayO
Page 105 and 106: 74 Rope return sheaves of a passeng
Page 107 and 108: 75 Rope sheave (underground mining)
Page 109 and 110: 76 Rope sheave of a pulley blockIn
Page 111 and 112: 77 Crane pillar mounting with a sph
Page 113 and 114: 79 Roller track assemblyThe radial
Page 115 and 116: 80 Crane run wheelOperating dataWhe
Page 117 and 118: 81 Crane hookThe load suspended fro
Page 119 and 120: 83 Head pulley of a belt conveyorOn
Page 121 and 122: Internal bearings for the tension/8
Page 123 and 124: Belt conveyor idlersMany industries
Page 125 and 126: 87 Bucket wheel shaft of a bucket w
Page 127 and 128: 89 Drive unit of a finished goods e
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91 Vibrating road rollerThe vibrati
Page 131 and 132:
92 Double toggle jaw crusherDouble
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94 Double-shaft hammer crusherDoubl
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95 Ball tube millTube mills are mos
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96 Support roller of a rotary kilnR
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Vibrating machinesVibrating screens
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98 Two-bearing screen with straight
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99 Four-bearing screenThe vibration
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101-103 Large capacity convertersCo
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104Roll bearings of afour-high cold
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Work rolls for the finishing sectio
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107 Combined reduction and cogging
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108 Work rolls of a section millThe
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Two-high rolls of a dressing stand1
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110 Straightening rolls of a rail s
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111 Disk ploughIn a disk plough the
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112 Plane sifterSifters are used in
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Printing pressesPrinting quality is
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114 Blanket cylinder of a sheet-fed
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116 Axial piston machineCylinder bl
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117 Axial piston machineOperating d
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119 Hot gas fanGas temperature 150
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121 Optical telescopeOperating data
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122-124 RadiotelescopeFor radioastr
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123 Azimuth axis (track roller and
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GlossaryAdditivesAdditives are oil-
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GlossaryAxial clearanceThe axial cl
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GlossaryContamination factor VThe c
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GlossaryEP additivesWear-reducing a
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Glossary1. Safe retention and unifo
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GlossaryLoad angleThe load angle i
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Glossaryload and the ring to be fit
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Glossaryaligning ball bearings, bar
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GlossaryViscosityViscosity is the m
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NotesFAG 196
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The Design of Rolling Bearing Mountings

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