Pump or compressor unit
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United States of America Patent
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May 16, 1989
Grant Date -
N/A
app pub date -
Jan 20, 1987
filing date -
Mar 19, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A pump or compressor unit (1) suited particularly for mixed phase fluids, e.g. mixed gas and oil, has a multistage axial flow compressor device with contra-rotating vanes. An upstream mixer device (10) and a downstream centrifugal impeller device (32) can each be driven by the compressor device (21, 26, 27, 29), which may be shaped to provide a flow passage of decreasing cross-section in the flow direction. The compressor drives may be supplied by axially adjacent electric motors (24, 25) which may surround rotating sleeves (21) carrying the compressor vanes. A fluid can be circulated through the unit, e.g. for electrical insulation, and may be leaked into the pump fluid through seals, when it may contain a corrosion inhibiting agent. The unit may be arranged to be movable along a pipeline under fluid pressure to engage power supply contacts at a predetermined location.
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