Semi -open impeller and use multistage centrifugal pump of low discharge superelevation lift of this impeller

The utility model discloses a multistage centrifugal pump of semi -open impeller and use semi -open impeller's low discharge superelevation lift, including the casing, set up entry and export on the casing, be provided with the pivot in the casing, the clearance is equipped with semi -open impeller in the pivot, semi -open impeller's both sides are equipped with stator and middle section piece respectively, stator and middle section piece pass through pivort fixation and are in semi -open impeller's both sides form an impeller subassembly, the impeller subassembly is arranged and is cup jointed in the pivot. The beneficial effects of the utility model mainly reside in that: have low flow, high -lift water conservancy, the operation does under 2 grades of rotational speeds, adopted the utility model discloses a semi -open impeller, can satisfy operating mode requirement and pumped (conveying) medium can have higher gassiness volume, be furnished with cartridge -type mechanical seal and antifriction bearing, do