Water inlet flow channel of axially split pump

Abstract

The invention discloses a water inlet flow channel of an axially split pump. The water inlet flow channel mainly comprises a water inlet, a volute zone and flow channel zones. Longitudinal water distributing ribs are arranged between the water inlet and the volute zone, and transverse flow guide ribs are arranged in the flow channel zones. Prismatic protrusions are arranged at starting ends of the longitudinal water distributing ribs and extend backwardly, the widths of the prismatic protrusions are gradually increased towards the two side flow channel zones, and the longitudinal water distributing ribs are connected with the inner walls of the two side flow channel zones in a smooth transition manner. The transverse flow guide ribs are horizontally arranged on central flow lines of the two side flow channel zones and are connected with the water inlet and an inlet of a water pump impeller all along. The water inlet flow channel has the advantages that the longitudinal water distributing ribs are reasonably arranged according to the shape of the water inlet flow channel, so that various sectional areas of the inside of the flow channel can be changed uniformly, and dead water zones and vortex zones can be eliminated; the transverse flow guide ribs are arranged on the central flow lines of the flow channel zones, so that a water inlet condition can be improved, and the structural strength of the water inlet flow channel can be enhanced.

Description

technical field [0001] The invention belongs to the technical field of hydraulic transportation, and in particular relates to a water inlet channel of a split pump. Background technique [0002] In the existing S-type split pump water inlet channel structure, the shape of the transition section between the water inlet and the semi-spiral suction chamber is complex and changeable, and the water flow is relatively chaotic, which easily causes eddies in the water inlet channel (such as figure 1 ), and the water begins to divide into two streams after entering the water inlet channel from the water inlet, but it is easy to form a dead water area in the middle of the pump volute (such as figure 2 ); For large and medium-sized split pumps, the wall thickness of the water inlet channel is thin, the structural strength is not good, and the axial deformation is large when the water pressure is high; when the water pump is working, the water pump rotor is likely to cause excessive vi...

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Problems solved by technology

[0002] In the existing S-type split pump water inlet channel structure, the shape of the transition section between the water inlet and the semi-spiral suction chamber is complex and changeable, and the water flow is relatively chaotic, which easily causes eddies in the water inlet channel (such as figure 1 ), and the water begins to divide into two streams after entering the water inlet channel from the water inlet, but it is easy to form a dead water area in the middle of the pump volute (such as figure 2 ); For large and medium-sized split pumps, the wall thickness of the water inlet channel is thin, the structural strength is not good, and the axial deformation is large when the water pressure is high; when the water pump is working, the water pump rotor is likely to cause excessive vibration, which affects the life of the water pump

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