Centrifugal pump with flow measurement
First Claim
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1. An improved process for measuring fluid flow through a centrifugal pump casing wherein an impeller, turning at generally constant speed, pumps fluid past a cut-water and a pump discharge inlet area, through a pump discharge nozzle to a discharge outlet, the improvement comprising:
- measuring the pressure head of a fluid being pumped by said pump at a first point in said pump discharge inlet area;
measuring the pressure head of a fluid being pumped by said pump at a second point, spaced from said pump discharge inlet area, in said discharge nozzle; and
, comparing the differential in pressure head between said first point and said second point, together with a pump flow constant, to measure fluid flow.
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Abstract
An improved pump casing and process for measuring fluid flow through a centrifugal pump casing is disclosed wherein the static pressure of a fluid being pumped by said pump is measured at a first point in the pump discharge inlet area of the pump adjacent the flow arm of the pump and at a second point removed along the nozzle, the pressures are compared to a pre-determined flow constant of the casing.
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19 Claims
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1. An improved process for measuring fluid flow through a centrifugal pump casing wherein an impeller, turning at generally constant speed, pumps fluid past a cut-water and a pump discharge inlet area, through a pump discharge nozzle to a discharge outlet, the improvement comprising:
- measuring the pressure head of a fluid being pumped by said pump at a first point in said pump discharge inlet area;
measuring the pressure head of a fluid being pumped by said pump at a second point, spaced from said pump discharge inlet area, in said discharge nozzle; and
, comparing the differential in pressure head between said first point and said second point, together with a pump flow constant, to measure fluid flow. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
- measuring the pressure head of a fluid being pumped by said pump at a first point in said pump discharge inlet area;
- 11. In a centrifugal pump having a casing, a suction inlet, a driving shaft, a centrifugal impeller mounted on said shaft within said casing, a pump discharge inlet area, and a discharge outlet communicating with said inlet area past a cut-water and through a discharge nozzle, the improvement comprising means for sensing a first pressure head at said pump discharge inlet area and means for sensing a second pressure head, spaced from said means for sensing a first pressure head, at said discharge nozzle toward said discharge outlet.
Specification