Underwater integrated electric motor thruster

Abstract

The present invent provides a underwater integration motor thruster, including a DC brushless motor composed of a stator core and a rotor; the stator core is mounted on a shaft fixed on a base, the external surface of the stator core has a groove, and an armature winding locates in the groove; the rotor spider is mounted on the shaft by a bearing, and a magnetic pole made of permanent magnetic material is mounted on the rotor spider; a air-tight case is fixed on the base, the top of the air-tight case is equipped with a mounting shaft for a sleeve barrel which is mounted on the mounting shaft; the cable wire of the armature winding is drawing off from a sealing plug. The invention eliminates influence of a mechanical retarding mechanism and an output shaft to the performance of the underwater motor thruster; the thruster has small dimension, less weight and high propulsion efficiency; the invention resolves the sealing problem of the underwater motor thruster and avoids using complicated dynamic sealing apparatus. The reliability of the underwater motor thruster is improved, and even though the propeller being entwined or stopped by underwater obstacles, the thruster motor can work still, thus the thruster is protected from being damaged.

Description

(1) Technical field [0001] The invention relates to an underwater propulsion device, in particular to an underwater propulsion device with a motor as a power device. (2) Background technology [0002] With the development of motors and their control technology, various forms of motors have been used as power devices for underwater propulsion. However, in current motor propellers, such as the propeller disclosed in the patent document of Chinese Patent Application No. 200620055186.1, the motor and the propeller that generate power are two independent components, and the two are connected to each other through a reducer or an output shaft. At the same time, the axial dimension of the motor propeller is longer, the mechanical loss is large and the noise is high during the work process. And the connection mode of the propeller is basically directly fixed on the output shaft of the propulsion motor or the reducer, so when sealing, the dynamic sealing technology with complex stru...

AI Technical Summary

Problems solved by technology

However, in current motor propellers, such as the propeller disclosed in the patent document of Chinese Patent Application No. 200620055186.1, the motor and the propeller that generate power are two independent components, and the two are connected to each other through a reducer or an output shaft. Together, the axial dimension of the motor propeller is longer, the mechanical loss is large and the noise is high during the working process

Moreover, the connection method of the propeller is basically directly fixed on the output shaft of the propulsion motor or the reducer, so that the dynamic sealing technology with complex structure, difficult processing and poor sealing effect has to be used for sealing.

In addition, when the propeller is entangled by underwater obstacles (such as fishing nets), the motor is in a locked-rotor state, which can easily cause damage to the motor propeller

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