Turbine flowmeter with simple hydrodynamic axial thrust compensation means
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United States of America Patent
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-
Aug 5, 1997
Grant Date -
N/A
app pub date -
Jul 24, 1995
filing date -
Feb 6, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The turbine flowmeter includes an axially movable rotatable impeller wheel (1) consisting of an impeller hub (3) and vanes (4) connected to it; a first fixed hub (5) on one side of the impeller wheel; a second fixed hub (6) on another side of the impeller wheel opposite from the side on which the first fixed hub (6) is located; bearing means (b) for rotatably mounting the impeller wheel (1) between the first fixed hub (5) and the second fixed hub (6) so that the impeller wheel (1) is axially movable; a first fluid coupling device including facing portions of the impeller hub (3) and the first fixed hub (5) and a second fluid coupling device including facing portions of the impeller hub (3) and of the second fixed hub (6). The facing portions of the impeller hub providing driving portions of the coupling devices and the facing portions of the fixed hub providing counterwheel portions. When fluid flow is always in only one direction through the turbine flowmeter, the upstream fluid coupling device may be omitted. The fluid coupling devices act to oppose the hydrodynamic axial thrust causing wear on the downstream thrust bearing.
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