Impeller built-in type high-speed centrifugal pump

Abstract

The invention provides an impeller built-in type high-speed centrifugal pump which comprises a shell and a rotating wheel. The rotating wheel is rotatably mounted in the shell. The impeller built-in type high-speed centrifugal pump is characterized in that the impeller built-in type high-speed centrifugal pump further comprises a motor stator and a motor rotor, the motor stator is mounted on the shell, the motor rotor is fixedly connected with the rotating wheel, the rotating wheel comprises an inducer and a centrifugal impeller, an outer ring is arranged on the edge of the outer side of the inducer, and the outer ring of the inducer is fixedly connected with the inner circle of the motor rotor; the motor stator is electrified, so that the motor rotor rotates; the centrifugal impeller andthe inducer rotate synchronously; and the rotating speed of the rotating wheel is not lower than 2800 r / min. The problem that the water outlet direction of a traditional centrifugal pump is perpendicular to the rotation axis of the pump is solved, meanwhile, the structural size of the traditional centrifugal pump is reduced, the axial force of the rotor is reduced, and the requirements of high-speed navigation devices such as torpedoes for high lift, large flow, stable operation and compact structures of water jet propulsion pumps can be met.

Description

technical field [0001] The invention relates to the field of centrifugal pumps, in particular to a high-speed centrifugal pump with built-in impellers. Background technique [0002] Water-jet propulsion is an important guarantee for realizing the technical index of water speed. The reaction force generated by the jet of water from the water-jet propulsion pump pushes the ship forward. As the core component of the water jet propulsion device, common pump structures include axial flow, mixed flow and centrifugal. Since the outlet direction of the traditional centrifugal pump is perpendicular to the rotation axis of the pump, the layout of the outlet pipe is complicated, and there will be a high hydraulic loss, so it is rarely used. Axial flow pumps are simple and compact in structure and light in weight, and are mainly used in occasions with low head and large flow. At present, most high-speed ships and amphibious vehicles use axial-flow water jet propulsion pumps. However,...

AI Technical Summary

Problems solved by technology

However, in some high-speed navigation devices, such as torpedoes and other high-speed navigation devices, it is necessary to provide a high head while satisfying a large flow rate, and this is an application that axial flow pumps are difficult to meet.

On the other hand, high-speed navigation devices such as torpedoes have higher requirements for the compactness of the propeller, which is difficult for traditional axial-flow water jet propulsion pumps to meet

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