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Polished rod load of the pumping system was induced by the sucker rod that drives the pump to reciprocate.
Power requirements and profitability of sucker-rod pumping are basically determined by the torque load on the pumping unit's gearbox.
Inspiratory occlusion produces a maximal load on the pumping action of the respiratory muscle and has been reported to elicit somatosensory respiratory related evoked potential (RREP) in humans (Davenport et al., 1986; Davenport et al., 2000) and lambs (Davenport et al., 2001).
The resulting force is self-adjusting with pump flow or speed, and results in a smaller residual thrust loading on the pump bearings.
To even the load on the generators, pumped-storage hydroelectric stations are occasionally built.
In this study we investigated the individual effects of stem surface finish, degree of mantle wear, and mode of loading on the stem pump mechanism.
The frequency of the expander was not imposed by an inverter or the electricity grid but depended directly on the attached generator load; both the electrical load on the generator and the pump rotational speed were varied in order to investigate the performance of the system.
The chapter also presents a review of hydraulic effects as they affect bearing life is two-pronged, stating that one needs to look at those which result in an increase in radial or axial thrust, thus resulting in a steady unidirectional high load on the bearings while the pump is operating; and at those which impart cyclic loading associated with flow instabilities.
Torques on the gearbox are found from the variation of the polished rod load during the pumping cycle; torque calculations, therefore, depend on the accurate measurement of those loads.
This paper explores the use of a commercial CFD code to estimate the total radial load on the impeller of two test pumps.
Dynamometers absorb power by placing a load on the running engine, using it to pump water or generate electricity.
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CEO of Professional Science Editing for Scientists @ prosciediting.com