Motorless mass flowmeter
First Claim
1. A motorless mass flowmeter having an inlet and an outlet for flow of fluid therethrough, the mass flowmeter comprising:
- a turbine subassembly;
a drum rigidly connected to the turbine subassembly such that the drum rotates in accompaniment to rotation of the turbine subassembly; and
an impeller rotationally coupled to the drum by way of a spring that allows relative rotation against the bias of the spring;
wherein the turbine subassembly has a first set of jets causing a first torque to be applied about a rotational axis of the turbine subassembly as fluid flows therethrough, the first torque tending to cause the turbine subassembly to rotate in a first direction;
the turbine subassembly has a second set of jets causing a second torque to be applied about the rotational axis of the turbine subassembly as fluid flows therethrough; and
a first set of one or more bypass valves causing an increasing amount of fluid to be diverted from the first set of jets to the second set of jets with increasing flow of fluid through the mass flowmeter.
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Accused Products
Abstract
A motorless mass flowmeter in accordance with one embodiment of the invention comprises a turbine subassembly, a drum, and an impeller. The drum is rigidly connected to the turbine subassembly such that the drum rotates in accompaniment to rotation of the turbine subassembly. The impeller is rotationally coupled to the drum by way of a spring that allows relative rotation against the bias of the spring. The turbine subassembly has jets and bypass valves. The turbine subassembly may be implemented in the form of a laminated bypass valve structure. The laminated bypass valve structure may include an entrance layer having entrance port(s), a closure layer having closure member(s), an exit layer defining exit passage(s), and an intermediary layer forming conduit(s) for guiding fluid from entrance port(s) to exit passage(s).
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Citations
11 Claims
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1. A motorless mass flowmeter having an inlet and an outlet for flow of fluid therethrough, the mass flowmeter comprising:
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a turbine subassembly; a drum rigidly connected to the turbine subassembly such that the drum rotates in accompaniment to rotation of the turbine subassembly; and an impeller rotationally coupled to the drum by way of a spring that allows relative rotation against the bias of the spring; wherein the turbine subassembly has a first set of jets causing a first torque to be applied about a rotational axis of the turbine subassembly as fluid flows therethrough, the first torque tending to cause the turbine subassembly to rotate in a first direction; the turbine subassembly has a second set of jets causing a second torque to be applied about the rotational axis of the turbine subassembly as fluid flows therethrough; and a first set of one or more bypass valves causing an increasing amount of fluid to be diverted from the first set of jets to the second set of jets with increasing flow of fluid through the mass flowmeter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification