The Design of Rolling Bearing Mountings

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1 2AAB1 Locating bearing2 Floating bearingA Baffle platesB Sight glass98: Bearing mounting of a two-bearing screen with straight-line motion141 FAG
99 Four-bearing screenThe vibration radius of a four-bearing screen is a functionof the shaft eccentricity. It is not variable; thereforethese screens are also called rigid screens.Operating dataScreen box weight G = 60 kN; eccentric radius r =0.005 m; speed n = 850 min-1; number of inner bearingsz = 2; acceleration due to gravity g = 9.81 m/s 2 .Bearing dimensioningInner bearingsFor the two inner bearings of a four-bearing screen,which are subjected to vibration, the equivalent dynamicload P is the same as for the two-bearing screenwith circular throwP = 1.2 · F r = 1.2/z · G/g · r · (π · n/30) 2 == 1.2/2 · 60/9.81 · 0.005 · (3.14 · 850/30) 2 = 145.4 kNThe required dynamic load ratingC = f L /f n · P = 2.93/0.378 · 145.4 = 1,127 kNSpherical roller bearings FAG 22328E.T41A (dynamicload rating C = 1,220 kN) are chosen.Outer bearingsThe stationary outer bearings are only lightly loadedsince the centrifugal forces of the screen box are balancedby counterweights. Generally spherical rollerbearings of series 223 are also used. The bearing size isdictated by the shaft diameter so that the load carryingcapacity is high and fatigue life calculation unnecessary.Since these bearings are not subjected to vibration, thestandard design with normal clearance is satisfactory.In the example shown spherical roller bearings FAG22320EK (dynamic load rating C = 655 kN) arechosen.Machining tolerancesInner bearingsThe inner bearings (a locating-floating bearing arrangement) feature point load on the inner rings: The shaftis machined to g6 or f6. The bearings are fitted tightlyinto the housing (P6).Outer bearingsThe outer bearings – also a locating-floating bearingarrangement – are mounted on the shaft with withdrawalsleeves. The shaft is machined to h8, the housingbore to H7.Lubrication, sealingGrease lubrication with a lithium soap base grease ofpenetration class 2 with anti-corrosion and extremepressure additives. Grease supply between the rollerrows through lubricating holes in the outer rings.Sealing is provided by grease-packed, relubricatablelabyrinths.Locating bearingFloating bearingCounterweight99: Four-bearing screenFAG 142
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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
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15 Vertical high-speed milling spin
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17 External cylindrical grinding sp
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19 Rotary table of a vertical lathe
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21 Rough-turning lathe for round ba
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22: Flywheel bearing arrangement of
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24 Double-shaft circular sawOperati
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Rollbending bearingsA counterbendin
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27 Spur gear transmission for a rev
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The effects of basing the bearing d
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29 Bevel gear - spur gear transmiss
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31 Worm gear pairOperating dataInpu
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at least normal cleanliness (contam
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33 Manual gearbox for trucksOperati
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34 Final drive of a passenger carOp
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Driven and non-steered rear wheel36
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38 Steering king pin of a truckA va
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40 Water pump for passenger car and
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42 Axle box roller bearings of an I
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43-44 UIC axle box roller bearings
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45Axle box roller bearingsof series
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47Axle box roller bearingsof the Ch
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48 Axle box roller bearings for an
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50Axle box roller bearingsaccording
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52Universal quill drivefor threepha
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54 Spur gear transmission for the u
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55 Bevel gear transmission for city
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56- 57 Spherical roller bearings as
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60 Spade-type rudderDesignThe slewi
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61-62 Ship shaft bearings and stern
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63-64 Ship shaft thrust blocksThe t
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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
Page 129 and 130: 91 Vibrating road rollerThe vibrati
Page 131 and 132: 92 Double toggle jaw crusherDouble
Page 133 and 134: 94 Double-shaft hammer crusherDoubl
Page 135 and 136: 95 Ball tube millTube mills are mos
Page 137 and 138: 96 Support roller of a rotary kilnR
Page 139 and 140: Vibrating machinesVibrating screens
Page 141: 98 Two-bearing screen with straight
Page 145 and 146: 101-103 Large capacity convertersCo
Page 147 and 148: 104Roll bearings of afour-high cold
Page 149 and 150: Work rolls for the finishing sectio
Page 151 and 152: 107 Combined reduction and cogging
Page 153 and 154: 108 Work rolls of a section millThe
Page 155 and 156: Two-high rolls of a dressing stand1
Page 157 and 158: 110 Straightening rolls of a rail s
Page 159 and 160: 111 Disk ploughIn a disk plough the
Page 161 and 162: 112 Plane sifterSifters are used in
Page 163 and 164: Printing pressesPrinting quality is
Page 165 and 166: 114 Blanket cylinder of a sheet-fed
Page 167 and 168: 116 Axial piston machineCylinder bl
Page 169 and 170: 117 Axial piston machineOperating d
Page 171 and 172: 119 Hot gas fanGas temperature 150
Page 173 and 174: 121 Optical telescopeOperating data
Page 175 and 176: 122-124 RadiotelescopeFor radioastr
Page 177 and 178: 123 Azimuth axis (track roller and
Page 179 and 180: GlossaryAdditivesAdditives are oil-
Page 181 and 182: GlossaryAxial clearanceThe axial cl
Page 183 and 184: GlossaryContamination factor VThe c
Page 185 and 186: GlossaryEP additivesWear-reducing a
Page 187 and 188: Glossary1. Safe retention and unifo
Page 189 and 190: GlossaryLoad angleThe load angle i
Page 191 and 192: 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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