Water inlet device for inhibiting saddle-shaped curve of lift of axial flow pump

• Main Authors: CHEN BIN, XU RONGJUN, HUANG XUEJUN, ZHANG HUA, SHI CHANGBIAO
• Format: Patent
• Language: Chinese; English
• Published: 06.03.2013
• Subjects: BLASTING; HEATING; LIGHTING; MECHANICAL ENGINEERING; NON-POSITIVE DISPLACEMENT PUMPS; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; WEAPONS

The utility model belongs to the technical field of hydraulic mechanical equipment, and discloses a water inlet device for inhibiting a saddle-shaped curve of the lift of an axial flow pump. The water inlet device mainly comprises an inlet pipe, an impeller, a lower runner chamber and an upper runner chamber which are arranged at the front end of the axial flow pump, wherein the impeller is fastened on a shaft through a key and an impeller nut. The water inlet device is characterized in that the inlet pipe is connected with the lower runner chamber; a radial clearance is reserved between the inlet pipe and the lower runner chamber; the inner wall of the inlet pipe is shaped like a horn; ribbed plates are evenly distributed on the outer wall of the inlet pipe; a flange is arranged at the tops of the ribbed plates; the outer diameter of a contractive rear end of the inlet pipe is smaller than the maximum outer diameter of a blade inlet edge of the impeller; and the diameter of a contractive initial end of the i