Measuring and testing – Volume or rate of flow – Using turbine
Patent
1997-01-21
1999-01-26
Chilcot, Richard
Measuring and testing
Volume or rate of flow
Using turbine
G01F 105
Patent
active
058640681
ABSTRACT:
The turbine flowmeter includes an impeller wheel mounted, so that it can rotate, between an upstream hub and downstream hub in a tubular element. The hubs are mounted securely in the tubular element by ribs. A device for regulating to compensate measuring errors resulting from manufacturing tolerances is provided at least on the upstream hub. To provide the regulating effect as well as to avoid an asymmetric flow against the impeller wheel the regulating device includes a pivotable regulating part (6) including fins (9) and is located immediately downstream of the upstream hub (1) and a drive device for pivoting the rotatable regulating part (6) about the impeller-wheel axis (A) between an off position (O) in which fins (9) are located in a turbulence region immediately downstream of the ribs (4) in a flow direction (F) through the tubular element (5) and at least one pivoted position (P',P") in which fins (9) extend in a flow region between the ribs (4) and are uniformly circumferentially distributed around the regulating part (6) to deflect a flow past it.
REFERENCES:
patent: 2949764 (1960-08-01), Knauth
patent: 4408498 (1983-10-01), Heath
Chilcot Richard
H. Meinecke AG
Patel Harshad
Striker Michael J.
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