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Compressors: How to Achieve High Reliability & Availability by Fred K. Geitner, Heinz P. Bloch

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CHAPTER 7
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Impellers and Rotors
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Construction, Inspection, and Repair of Impellers
A closed impeller with backward-leaning vanes is shown in Fig. 7.1. Such impellers offer a wide operating range and the backward lean offers a combination of process stability and reasonable efficiency. Two versions are widely available, a two-dimensional (2-D) and a three-dimensional (3-D) configuration. Figure 7.2 shows a 3-D impeller that was contour milled from one single piece of metal. This type of contour milling is ranked among the favored fabrication processes ...

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