Novel guide vane for horizontal type multi-stage pump

Abstract

The invention relates to a novel guide vane for a horizontal type multi-stage pump. The novel guide vane for the horizontal type multi-stage pump comprises a guide vane covering plate and a return guide vane blade, and is characterized in that the modeled line of flow deflectors on a forward guide vane on the guide vane covering plate is a spiral line plus an involute, and the two flow deflectors are symmetrically distributed on the guide vane covering plate at 180 degrees. The novel guide vane for the horizontal type multi-stage pump is characterized in that the length of the spiral line of each flow deflector accounts for three fourths the whole length of each flow deflector, and the length of the involute accounts for one fourth of the whole length of each flow deflector. The novel guide vane for the horizontal type multi-stage pump has the advantages of improving the flow amount and the stroke range of the multi-stage pump and guaranteeing an efficient area width while the large flow amount and stoke range of the multi-stage pump are met.

Description

technical field [0001] The patent of the present invention relates to a new guide vane for a horizontal multistage pump. Background technique [0002] The existing horizontal multistage pump is mainly composed of bearing body 21, suction section 22, impeller 23, middle section 24, guide vane 25, shaft 26, water outlet section 27, stuffing box body 28 and other parts (see attached figure 1 ). Existing guide vane 25 is mainly made up of several parts such as guide vane cover plate 31, positive guide vane blade 32, reverse guide vane blade 33 (see attached figure 2 ). Since the existing horizontal multistage pumps are equipped with guide vanes, the gap between the outer diameter of the impeller and the inner circle of the guide vanes is required to be small, so the performance expansion of the horizontal multistage pump is limited. It has the following disadvantages: when the performance required by the user is different from the conventional performance, and it needs to be...

AI Technical Summary

Problems solved by technology

Since the existing horizontal multistage pumps are equipped with guide vanes, the gap between the outer diameter of the impeller and the inner circle of the guide vanes is required to be small, so the performance expansion of horizontal multistage pumps is limited.

It has the following disadvantages: when the performance required by the user is different from the conventional performance, and it needs to be met by cutting the outer diameter of the impeller, the cutting amount is limited to a small amount, generally no more than 3%, and cannot meet the requirements of a wide range of performance. ;When the impeller is cut, it will have a great influence on the efficiency, flow and head of the pump

Images