A high-speed centrifugal pump with built-in impeller

Abstract

The invention provides a high-speed centrifugal pump with built-in impeller, comprising a casing and a runner, the runner being rotatably installed in the casing, and characterized in that it also includes a motor stator and a motor rotor, and the motor stator is installed in the casing On the body, the motor rotor is fixedly connected with the runner, the runner includes an inducer and a centrifugal impeller, the outer edge of the inducer is provided with an outer ring, and the outer ring of the inducer is connected to the inner ring of the motor rotor. The circle is fixedly connected; electricity is obtained from the motor stator to make the motor rotor rotate; the centrifugal impeller and the inducer rotate synchronously; the rotational speed of the runner is not lower than 2800r / min. The invention overcomes the problem that the water outlet direction of the traditional centrifugal pump is perpendicular to the rotation axis of the pump, and at the same time reduces the structural size of the traditional centrifugal pump, reduces the axial force of the rotor, and can meet the requirements of high-speed sailing devices such as torpedoes for the high-lift, large-capacity water-jet propulsion pump. flow, stable operation and compact structure.

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 to achieve the technical indicators of water speed. The reaction force generated by the water jet of the water jet propulsion pump pushes the ship forward. As the core component of water jet propulsion, common pump structures include axial flow, mixed flow and centrifugal. Since the water outlet direction of the traditional centrifugal pump is perpendicular to the rotation axis of the pump, the layout of the water outlet pipeline is complicated, and the hydraulic loss will be relatively high, so it is rarely used. The axial flow pump is simple and compact in structure and light in weight, and is mainly used in occasions with low lift and large flow. At present, most of the high-speed ships and amphibious vehicles use axial-flow water-jet propulsion...

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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