Multistage compressor and method for operating a multistage compressor
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United States of America Patent
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Feb 27, 2018
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N/A
app pub date -
Dec 16, 2013
filing date -
Dec 21, 2012
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Abstract
A multi-stage compressor is described, comprising a rotor having a plurality of axially stacked impellers and a tie rod extending through the stacked impellers and holding the impellers together. A gas compression path extends from a compressor inlet to a compressor outlet and through the impellers. A flow channel is provided between the tie rod and the stacked impellers. The flow channel develops along at least a portion of the tie rod. Hot gas is diverted from the compression path and flows through the flow channel to heat the tie rod during startup of the compressor.
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