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Handbook for Cogeneration and Combined Cycle Power Plants, Second Edition

Meherwan P. Boyce, P.E.
Meherwan P. Boyce, P.E.
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ASME Press
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The bearings in gas and steam turbines provide support and positioning for the rotating components. Radial support is generally provided by journal or roller bearings, and axial positioning is provided by thrust bearings. Some engines, mainly aircraft jet engines — use ball or roller bearings for radial support but nearly all-industrial gas turbines use journal bearings.

A long service life, a high degree of reliability, and economic efficiency are the chief aims when designing bearing arrangements. To reach these criteria, design engineers examine all the influencing factors:

1. Load and speed

2. Lubrication

3. Temperatures

4. Shaft arrangements

5. Life

6. Mounting and dismounting

7. Noise

8. Environmental Conditions.

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