CAVITATION LIMITING STRATEGIES FOR PUMPING SYSTEM
First Claim
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1. A method of operating a pumping system comprising:
- moving a pumping element in a pump to transition a liquid between a pump inlet and a pump outlet in the pump;
receiving inlet pressure data indicative of an inlet pressure of the liquid at the pump inlet, and pumping speed data indicative of a pumping speed of the pump;
determining a pressure value based at least in part on the inlet pressure data and the pumping speed data that is indicative of a pressure of the liquid within a bore in the pump susceptible to cavitation of the liquid; and
varying at least one of the pumping speed or the inlet pressure, responsive to the determined value.
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Abstract
Operating a pumping system includes moving a pumping element to transition liquid through the pump, and determining a value based at least in part upon inlet pressure and pumping speed that is indicative of a pressure of the liquid within a bore susceptible to cavitation. Pumping speed and/or inlet pressure can be varied responsive to the determined value to limit cavitation.
13 Citations
20 Claims
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1. A method of operating a pumping system comprising:
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moving a pumping element in a pump to transition a liquid between a pump inlet and a pump outlet in the pump; receiving inlet pressure data indicative of an inlet pressure of the liquid at the pump inlet, and pumping speed data indicative of a pumping speed of the pump; determining a pressure value based at least in part on the inlet pressure data and the pumping speed data that is indicative of a pressure of the liquid within a bore in the pump susceptible to cavitation of the liquid; and varying at least one of the pumping speed or the inlet pressure, responsive to the determined value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of setting up a pumping system for service comprising:
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populating a data structure with a plurality of bore pressure values indicative of a pressure of a liquid in a bore within a pump of the pumping system positioned fluidly between a pump inlet and a pump outlet; mapping the plurality of bore pressure values in the data structure to a plurality of inlet pressure values indicative of a pressure of the liquid at the pump inlet and a plurality of pumping speed values indicative of a pumping speed of the pump, such that bore pressure varies in a manner that is dependent upon both inlet pressure and pumping speed; and generating a cavitation threshold model that is based on a subset of the plurality of the bore pressure values and a vapor pressure of the liquid; the cavitation threshold model defines an operating curve for the pump, such that upon operating the pump according to the operating curve cavitation of the liquid within the bore is limited. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A pumping system comprising:
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a pump including a pumping element movable within a bore in a pump housing to transition a liquid between a pump inlet and a pump outlet in the pump housing; a control system coupled with the pump and including a first monitoring mechanism structured to monitor a first parameter indicative of an inlet pressure at the pump inlet, a second monitoring mechanism structured to monitor a second parameter indicative of a pumping speed of the pump, and an electronic control unit; the electronic control unit being coupled with each of the first monitoring mechanism and the second monitoring mechanism and structured to determine a pressure value indicative of a pressure of the liquid within the bore in the pump housing based at least in part on the inlet pressure and the pumping speed indicated by the first monitoring mechanism and the second monitoring mechanism, respectively; the control system further including a cavitation alert device structured to produce an operator-perceptible alert indicative of expected cavitation of the liquid within the bore, and the electronic control unit being coupled with the operator alert device and structured to activate the operator alert device responsive to the determined value. - View Dependent Claims (19, 20)
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Specification