Measuring and testing – Volume or rate of flow – Tank type
Patent
1978-08-21
1980-02-05
Myracle, Jerry W.
Measuring and testing
Volume or rate of flow
Tank type
73231M, G01F 128
Patent
active
041866029
ABSTRACT:
A restrained turbine high dynamic response mass rate of fluid flow sensor for applications to air flow sensing in internal combustion engine fuel controls. The turbine rotor vanes impart an angular momentum change to the fluid in passing through the turbine vanes and signals are generated corresponding to the resulting reaction forces, these signals combined with signals corresponding to the fluid temperature and downstream pressure to yield mass rate of flow output signals. Variations of the turbine rotor support configurations include a friction free flexural restraint comprised of radial webs which may also act as stator vanes, secured to the turbine hub. In several embodiments, reaction forces are sensed by measuring the reactive torque imposed on the turbine rotor and the flexural restraint supporting the rotor provides a rigid support for absorbing the radial and axial forces while being compliant to torque. In these embodiments, the torque is measured either by allowing limited deflection against the resilience of the flexure and measuring the deflection, or by rigidly resisting angular deflection and measuring the reaction force with a force sensing transducer. In a torque sensing embodiment, a nonlinear spring opposes the angular deflection of the turbine rotor to produce an angular deflection decreasing with increasing flow rates to vary the relationship of the output signals of the sensor in relation to the mass flow rate. In an alternate embodiment, the turbine support is compliant to the axial reaction forces acting on the turbine rotor, and a force transducer absorbing the axial forces generates signals corresponding thereto. An optimum ratio of the turbine hub diameter to outer vane diameter is disclosed.
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Blatter Albert
Miller John
Haas, Jr. Gaylord P.
Myracle Jerry W.
The Bendix Corporation
Wells Russel C.
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