Analysis of piston pump flow rate variation
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The outlet pressure of the high-pressure plunger pump is 6 megapascals. At a rotational speed and flow rate of 50, the electromagnetic flow rate is 47; when the rotational speed and flow rate are increased to 80, the electromagnetic flow rate becomes 75. The factor that affects the discrepancy between the theoretical flow rate of the plunger pump and the actual electromagnetic flow rate is the internal leakage of the inlet check valve, as well as leaks in the piston packing. When the outlet pressure remains constant, the amount of internal leakage also stays fixed. Since there isn’t a strong relationship between the outlet flow rate and pressure of a plunger pump, why then, when the outlet pressure is constant during operation, does the difference between the theoretical rotational speed and flow rate and the actual electromagnetic flow rate increase linearly as the flow rate increases? \ud83d\ude0a\ud83d\ude07\ud83d\ude07\ud83d\ude07\ud83d\ude07
What is the rotational speed? At low speeds, the leakage rate of the check valve isn’t significantly affected by the speed; however, at higher speeds, such as an increase from 1000 RPM to 1500 RPM, the leakage rate of the check valve increases, as the delay in its return to its original position leads to more leakage. This is just one possible explanation – the actual reasons need to be analyzed in detail.
The theoretical and actual flow rates should be constant values, right?