DTHC.121413.ISB.00H (Working Conditions)
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Transcript of DTHC.121413.ISB.00H (Working Conditions)
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Intermediate Shaft Bearing
Steady state operation
Working parameters
Product identification:
Intermediate shaft bearing model
Drawing number
Bearing geometrical data:
Diameter [D] 239,00 mm.
Effective length [B] 125,00 mm.
Working conditions:
Rpm max [Nmax] 240,00 Rpm 3,00 m/s
Load in operation [F] 23,90 kN 2436,29 kgf
Environment temperature [Tenv] 45,00 CCooling water [TW] 38,00 C
Manufacture tolerances:
Relative bearing clearance [y] 1,24 /oo
Bearing hole [DB] 239,30 mm. max. H7
239,25 mm. min.
Shaft diameter [DS] 239,00 mm. max. h7
238,95 mm. min.
Oil identification:
Oil quality proposed
Oil standard ISO VG100 Acc. To DIN 51519
Viscosity at 40C 100 cStProposed White metal quality:
White metal quality Acc. To ISO 4381:2000
Surface quality:
Shaft roughness, better than [Rash] 0,80 mm N6
Bearing roughness, better than [Rabr] 0,80 mm N6
Working limits:
Maximum projected pressure [pmax1] 0,80 MPa Acc. To Manufacturer
Bearing maximum working temperature [tmax1] 65,00 C Acc. To Manufacturer
Minimum Oil film thickness necessary [Th1] 0,017 mm Acc. To Manufacturer
Rpm min recommended for continuous work [Nmin] 29,56 Rpm Calculated
Required cooling water flow[Q
w]
230,00 L/h Acc. To Manufacturer Observations:
PbSb10Sn6
Reference CEDN 235
Document Standard DTCS.ISB.00H
Page: WP 01
Ship Name / Project: ---
Shipyard / Owner: ---
Bearing calculation was perform with cooling coil consideration.
The indicated minimum Rpm are for worst continuous working condition with warm oil (low viscosity) in order
to avoid excessive wear down.
Bearing must be located preferrably in areas where the air circulation improve the natural convection cooling,
closed areas are to be avoided.
Bearings located near of hot points as motor, gearboxes... where can receive radiant heat are to be used
preferrably with help of external cooling system (cooling coil or external cooler).
CASTROL Alpha SP100
CEDN 235
---
ISO 9.001: Certificate Ner DCA-0106-AQ-2000ISO 14.001: Certificate Ner DCA-0937-AE-2001Manufacture of bearings, stern tube seals and liners,tail shafts and rudders.Manufacture and repair of white metal bearings.
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Intermediate Shaft Bearing
Steady state operation
Graphics
Friction factor
Power lost
Ship Name / Project: ---
Reference CEDN 235
Document Standard DTCS.ISB.00H
Page: Graphics 02
Shipyard / Owner: ---
0,0000
0,0005
0,0010
0,0015
0,0020
0,0025
0,0030
0,0035
0,0040
0,0045
Frictionfactor(m)
Rpm
0,00
50,00
100,00
150,00
200,00
250,00
300,00
350,00
Powerlost(
W)
Rpm
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