Low noise shaftless pump-jet nuclear submarine

Abstract

A low noise shaftless pump-jet nuclear submarine is composed of a shaftless pump-jet propeller and a nuclear submarine main body. The shaftless pump-jet propeller is installed at the tail portion of anuclear submarine, the shaftless pump-jet propeller is integrally composed of a axial-flow type water pump and a high-power circumferential motor, the power density of the high-power circumferentialmotor is high, and the sealing quality of an injection-molding packaged circumferential motor stator and an injection-molding packaged circumferential motor rotor is high; a front annular bearing anda rear annular bearing are made of stainless steel, marine corrosion can be totally and effectively prevented through the shaftless pump-jet propeller, and the position between the circumferential motor stator and the circumferential motor rotor is located by the front annular bearing and the rear annular bearing and is kept steady through the magnetic force of a permanent magnet ring; an inner circle of the stator and an outer circle of the rotor are installed and separated under a sliding fit condition, an annular magnetic gap between the circumferential motor stator and the circumferentialmotor rotor is operated under the condition of water lubrication, and the rolling friction of the front annular bearing and the rear annular bearing is converted into the water lubricating friction; the noise of bearings and gears is not generated, blades of an axial-flow type propeller are in an involute shape, and the noise of blade stirring is low; and the production and the maintenance of thehigh-power circumferential motor is easy, and the cost is low.

Description

technical field [0001] The invention relates to a nuclear submarine propelled by a permanent magnet motor, in particular to a low-noise shaftless pump jet nuclear submarine. Background technique [0002] The nuclear submarine is the most important strategic military equipment of the navy. In order to better hide the nuclear submarine in the depths of the sea, so that the enemy's sonar detector is not easy to find itself, the silence of the nuclear submarine is very important. In order to reduce the noise produced by the electric propeller Noise, using a pump jet propulsion device, the "ship and submarine propeller" disclosed in the Chinese patent CN2608418, is a water inlet at the front of the submarine, which communicates with the water outlet at the rear of the submarine through a pipeline, and connects the water outlet with the water inlet. A propeller is installed in the pipe between the water ports. When the propeller rotates, it uses the same principle as the water pum...

AI Technical Summary

Problems solved by technology

The disadvantage of this patent is that the structure of the submarine propeller affects the internal layout of the submarine and reduces the utilization rate of the limited space of the submarine.

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