Continental Industrie Model - 500 - Manual (Page 2)

Values, dimensions and reference in this brochure are approximate and intended as guide only, not for construction and are subject to change without notice
DETAILED ENGINEERING DESCRIPTION - CONTINENTAL INDUSTRIE
DEB500EN – 04/2010
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4.0 Bearing housing
The outboard bearing housings are cast iron and bolted to the outside of the head sections
insuring cool operation of bearings.
4.1 Cast iron EN-GJL-250 (ASTM A48-35B)
4.2 Two cored openings are provided to allow circulation of air (except for gas).
4.3 Has cast fins to improve rigidity and increase heat dissipation
4.4 Labyrinth type oil seal. Oil passages are generously sized to allow optimum
recirculation.
4.5 Has magnetic plug at the bottom of the oil reservoir.
4.6 Provided with 4 tapped holes in the housing flange to act as bearing puller.
N.B. : When the inlet air or gas temperature is too high, we can adapt as option special
bearing housings with a water or air cooling system (technical drawing on request).
5.0 Bearings
5.1 The rotor assembly is supported by 2 heavy duty oil lubricated ball bearings, single
row, sized to withstand the thrust load also type SKF or FAG.
5.2 Sized for minimum 10 years of operation (Direct Drive only), following SKF L10
bearing life calculation method.
5.3 Bearings are mounted in outboard type bearing housings and located so that
bearings may be serviced without disassembling the blower casing.
6.0 Shaft
6.1 42CrMo4 (AISI4140) carbon steel shaft, heat treated, straightened and stress-
relieved.
6.2 Shaft is ground all over
6.3 Stiff shaft design to minimize vibration
6.4 The diameter of the shaft end is 70 mm (2.76”)
7.0 Shaft seals
7.1 Shaft sealing is accomplished using graphite or carbon ring seals
8.0 Impellers
8.1 One piece cast aluminium EN AC-43100 (AISI 360.1)
8.2 For minimum corrosion all aluminium alloys are non copper alloys
8.3 The outer diameter of the impeller is 806 mm (32”)
8.4 Each impeller is automatically sanded or shotted when leaving the foundry before
the machining
8.5 Each impeller is statically balanced.
8.6 Impeller tip speed : 151 m/sec (494 FPS) at 3600 rpm
8.7 First critical speed (7 stages) 4392 rpm.
8.8 Impeller assembly : to consist of a heavy steel shaft accurently machined and one
or more aluminium alloy cast impeller, statically balanced, securely keyed to shaft
and held in place by lockwashers and locknuts.