Structural design and cavitation performance research of single-acting sliding vane pump under high rotational speed and petroleum medium

In order to study the effect of the structural parameters of the sliding vane pump and the cavitation performance of the sliding vane pump, the computational fluid dynamics method was used to numerically simulate the internal flow field of the single-acting sliding vane pump. The calculation results show that the maximum local gas volume fraction of the pump with only one suction cavity and one discharge cavity is 1.54%, which is much lower than the cavitation volume fraction of other pumps, and the negative effect of cavitation is greatly reduced; as the number of the sliding vanes increases, The cavitation area of the sliding vane pump gradually decreases; when the rotor speed is 1500 r/min, the minimum and maximum local gas volume fraction of the sliding vane pump are 1.28% (the number of the sliding vanes is three) and 2.82% (the number of the sliding vanes is 6), respectively; the local gas volume fraction of the sliding vane pump with odd sliding vane is obviously smaller than that of the similar sliding vane pump with even number of sliding vanes, and the more the number of sliding vanes, the higher the gas content of the cavitation area of the sliding vane pump. Appropriately reducing the number of sliding vanes and selecting an odd number of sliding vanes can effectively improve the cavitation performance of the pump.