Electric thruster for submarines and ships

Abstract

The invention provides an electric thruster for submarines and ships. The electric thruster comprises a rotor seal shell, a variable-frequency motor rotor, a rotating shaft, a variable-frequency motor stator, a front bearing, a back bearing, a seal flange, a propeller, a variable-frequency speed governor and a variable-frequency motor shell; the rotor seal shell is made of a hard non-metal material, reinforcing ribs are arranged on the outer surface of the rotor seal shell in the length direction, a front-end opening of the rotor seal shell is fixedly connected with the seal flange, the circle center of the seal flange is provided with the front bearing, the back-end circle center of the seal flange is provided with a bearing sleeve and the back bearing, the variable-frequency motor rotor is arranged in the rotor seal shell and supported between the front bearing and the back bearing to freely rotate through the rotating shaft, and the front end of the rotating shaft stretches out of a ship shell for installing the propeller; the variable-frequency motor stator is integrally installed outside the rotor seal shell in a sleeving mode, the variable-frequency motor shell is installed outside the variable-frequency motor stator in a sleeving mode, the front end of the variable-frequency motor shell is fixedly connected with the seal flange, a support seat is arranged at the center circle of the back end in the variable-frequency motor shell and installed outside the bearing sleeve in a sleeving mode, the lower portion of the variable-frequency motor shell is provided with a mounting base, and the variable-frequency motor stator is electrically connected with the variable-frequency speed governor.

Description

technical field [0001] The invention relates to a propeller for a submarine, in particular to an electric propeller for a submarine. Background technique [0002] Submarines, warships, and various supply ships are the most basic equipment of the navy. The propellers of modern submarines and many ships are driven by electric motors instead of directly by turbines. The so-called ships using integrated power systems are powered by nuclear reactors. 1. The boiler provides heat to heat the steam, drives the steam turbine to make the generator generate electricity, and all the mechanical work of the steam turbine is converted into electric energy, and then the electric energy is distributed to the entire ship according to the needs. The warship uses an integrated power system, which can distribute energy more flexibly, making Warships have the ability to use more powerful electrical equipment. The electric propeller is driven by the motor drive shaft protruding out of the ship's ...

AI Technical Summary

Problems solved by technology

The seal of the propeller shaft belongs to the rotary seal, which is the so-called shaft seal. At present, the shaft seal generally uses elastic components as the compensation mechanism, and the friction between the graphite sheet and the high surface precision steel ring is used to maintain the seal. Since the friction is used to maintain the seal, its friction The force is relatively large, so that part of the power of the electric propeller is consumed by friction, which reduces the efficiency of the motor. In addition, its sealing effect is not completely satisfactory.

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