Rim driving propeller with dummy shaft structure

Abstract

The invention discloses a rim driving propeller with a dummy shaft structure, which comprises an annular guide pipe, a dummy shaft is coaxially arranged in the annular guide pipe, a bearing is coaxially and fixedly sleeved outside the dummy shaft, an impeller is coaxially and fixedly sleeved outside the bearing, and a rim motor rotor is coaxially and fixedly sleeved outside the outer edge of the impeller. The rim motor stator matching the rim motor rotor is coaxially embedded in the inner wall of the annular guide pipe, and a rear guide vane with the outer edge connected to the inner wall of the annular guide pipe is coaxially and fixedly arranged at the position, located behind the bearing, outside the dummy shaft in a sleeving mode. According to the invention, the space structure of the dummy shaft under the large hub ratio scale of the impeller is reasonably utilized, and the bearing is arranged at the hub, which means that the diameter is smaller, the linear speed is smaller during working, and the friction loss is reduced; and meanwhile, only the rim motor stator is placed in the annular guide pipe, the structural form is simpler, the radial thickness of the annular guide pipe is reduced, structural optimization of the annular guide pipe is more facilitated, and the flow resistance during working of the pump-jet propeller is reduced.

Description

technical field [0001] The invention belongs to the technical field of pump-jet propellers, and in particular relates to a rim-driven propeller with a false shaft structure. Background technique [0002] With the development of marine military science and technology in the world, high speed and concealment have become important indicators of the combat effectiveness and survivability of marine ships, submarines and torpedoes. However, the traditional propeller propeller has a large propulsion noise at high speed, which has been difficult to meet the needs of current equipment. Therefore, the world's major oceanic powers have begun to develop special propellers to achieve higher speeds and lower noise levels. As a new type of propeller, the pump jet gradually replaces the propeller and is used in submarines and torpedoes. The pump spray can be divided into two types according to the driving mode, one is the mechanical pump spray driven by the main shaft; the other is to dri...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a rim-driven propeller with a false shaft structure, which solves the problems of low efficiency and large friction loss of the existing shaftless pump spraying machine

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