Axial-flow type double-duct water-jet propeller

Abstract

The invention relates to an axial-flow type double-duct water-jet propeller, and belongs to the field of fluid mechanical engineering and ship propulsion. The invention aims to solve the problem that an existing axial flow type water-jet propeller is low in lift. The propeller is composed of a support, an outer duct transmission shaft, a water inlet runner, an outer duct impeller chamber, an outer duct guide vane chamber, a nozzle, an outer ducted impeller hub, outer ducted impeller blades, outer ducted guide vane blades, an inner ducted transmission shaft, an inner ducted impeller hub, an inner ducted guide vane hub, an inner ducted impeller chamber, an inner ducted guide vane chamber, inner ducted impeller blades, inner ducted guide vane blades and a flange plate. According to the axial-flow type double-duct water-jet propeller, on the premise that large flow is guaranteed, the lift of the water-jet propeller can be improved, the cavitation resistance is improved, the axial-flow type water-jet propeller can be applied to propelling of a high-speed navigation body, and meanwhile the defects that a multi-stage water-jet propeller is large in weight, large in space size and the like are overcome through the axial-flow type double-duct water-jet propeller.

Description

technical field [0001] The invention relates to an axial-flow double-duct water jet propeller, which belongs to the fields of fluid mechanical engineering and ship propulsion. Background technique [0002] The water jet propeller is a special propulsion method different from the propeller propeller. It is generally composed of four parts: the water inlet channel, the water jet propulsion pump, the nozzle and the reversing device. The water inlet channel is the part that diverts the water flow from the bottom of the ship to the inlet of the water jet propulsion pump. The propulsion pump is the core working part of the water jet propulsion unit, and its function is to convert the rotational mechanical energy of the prime mover into the kinetic energy, pressure energy and potential energy of the water flow. The nozzle is to convert the pressure energy of the water flow into kinetic energy, so that the water flow can be ejected at a higher speed. The function of the reversing de...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to solve the problem of low head of the existing axial-flow water jet propeller, and provide an axial-flow double-duct water jet propeller, which can increase the water spraying speed under the premise of ensuring a large flow rate. The lift of the propeller enables the axial-flow waterjet propulsion to be applied to the propulsion of high-speed sailing bodies. At the same time, the axial-flow double-duct waterjet propulsion avoids the disadvantages of multi-stage waterjet propulsion such as heavy weight and large space size.

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