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BEHRING STIFFNESSES, LB/IN

FIGURE 6 Undamped critical speed map of multistage boiler-feed pump with plain journal bearings (lb/in X 175 = N/m)

BEHRING STIFFNESSES, LB/IN

FIGURE 6 Undamped critical speed map of multistage boiler-feed pump with plain journal bearings (lb/in X 175 = N/m)

FIGURE 7 Rotor cross-section of multistage high-pressure boiler-feed pump with plain journal bearings. Rotor weight = 377.7 lb (171.3 kg), rotor length = 84.6 in (215 cm); number of stations = 47, number of bearings or bushings = 4 (in X 2.54 = cm)

Figures 6 to 9 illustrate it in the same fashion as the previous example the design audit of a steam-turbine-driven, 4 X 8 X 102, six-stage, boiler-feed pump using hydrodynamic radial and thrust bearings. No problems were experienced with this pump.

A more complete listing of data from analysis is shown with an added breakdown of the rotor model and the output of the first, second, and third resonant modes. The first critical (rotor resonance) is now a cylindrical mode and not a conical mode, as previously seen for the overhung impeller of the single-stage process pump.

Renewable Energy 101

Renewable Energy 101

Renewable energy is energy that is generated from sunlight, rain, tides, geothermal heat and wind. These sources are naturally and constantly replenished, which is why they are deemed as renewable. The usage of renewable energy sources is very important when considering the sustainability of the existing energy usage of the world. While there is currently an abundance of non-renewable energy sources, such as nuclear fuels, these energy sources are depleting. In addition to being a non-renewable supply, the non-renewable energy sources release emissions into the air, which has an adverse effect on the environment.

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