On the factors that affect the characteristics of the vane pump

Due to the special requirements of the stator curve, constant acceleration and deceleration curves with good performance and easy processing are usually used as the transition curves of the stator arc radius. As shown. Within a certain radius of the radius of the range, it can make the blade in the first half of the transition curve for radial and other accelerated movement, the second half for equal deceleration movement, and no speed mutation, does not produce rigid impact and void. Double-acting vane pump working chamber In order to ensure that suction and pressure oil chambers are closed to each other, communication does not occur, the suction plate on the valve plate, the interval between the oil pressure window corresponding to the central angle is not less than the central angle between two adjacent blades In addition, taking into account the thickness of the blade, the stator curve processing, the appropriate adjustment of the length and the radius of the transition curve and the corresponding center angle, and. Pump flow pulsation and pressure fluctuations have significantly improved. Practice shows that the general (Rr) is not greater than 7.3mm, you can get a reasonable structure, pressure stability, uniform flow, better performance vane pump. Concluding remarks Although the curve of acceleration and other slowdown curves do transition curve pump pressure stability, uniform flow, better performance, but also have different degrees of rigid impact or flexible impact, and the emergence of high pressure back pressure caused by the impact. At present, the most recent method adopts a transition curve of a high-order curve to optimize the design of a large-radius circular arc as a precompressed curve segment, and then adjusts the curve adjacent to the circular arc to maintain the smoothness of the transition curve so that the pump has neither rigidity Impact and no impact of flexibility, while addressing the phenomenon of high pressure reflux. Therefore, the maximum allowable length and radius of the pump of the same type of new product design and study of important guiding value.

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