Rim propeller driven by coreless permanent magnet motor

Abstract

The invention relates to an underwater propeller, in particular to a rim propeller driven by a coreless permanent magnet motor. The rim propeller comprises an iron-core-free permanent magnet motor stator, an iron-core-free permanent magnet motor rotor, a front end cover, a rear end cover, a propeller, a guide vane and a shaft, the iron-core-free permanent magnet motor rotor is arranged on the inner side of the iron-core-free permanent magnet motor stator, the front end cover and the rear end cover are installed at the front end and the rear end of the iron-core-free permanent magnet motor stator, and the guide vane is connected to the outer side of the rear end cover; the coreless motor rotor is sleeved on the propeller, the propeller is installed on the shaft through a bearing, and the rear end of the shaft is connected with the guide vane in a positioning mode. The coreless permanent magnet motor is adopted to drive the propeller, the motor rotor directly sleeves the propeller, the transmission efficiency is high, the structure is compact, the coreless permanent magnet motor has no iron loss during operation, the electromagnetic efficiency is high, the cogging torque effect of a traditional coreless permanent magnet motor is avoided, the vibration noise is low, and the coreless permanent magnet motor is suitable for high-efficiency and low-noise underwater application requirements.

Description

technical field [0001] The invention relates to a propeller, in particular to a wheel rim propeller driven by an iron-less permanent magnet motor. Background technique [0002] Underwater propulsion is an important component to realize the navigation capability of submarines and underwater robots, and it can meet the thrust requirements of different operating tools such as underwater robots at different speeds. However, as the application of underwater robots becomes more and more extensive, the requirements for the efficiency, compactness and low noise characteristics of the propeller are becoming more and more obvious. The underwater operating environment requires the thruster to be waterproof and pressure-resistant. When it is applied to an underwater robot, the structure of the thruster is required to be as compact as possible to facilitate the arrangement of other equipment on the robot. Due to the limited energy carried on the underwater robot, the efficiency of the p...

AI Technical Summary

Problems solved by technology

The traditional high-efficiency propeller uses a permanent magnet motor to drive the propeller through the transmission shaft to generate thrust. This method has low transmission efficiency, takes up a lot of space, and has high iron loss of the motor. Especially when running at low speed, the proportion of iron loss increases significantly. The electromagnetic efficiency is very low; because the traditional permanent magnet motor uses a stator with an iron core, the cogging torque is large, and the vibration noise of the propeller is obvious, which affects the work of the acoustic equipment of the underwater robot; in order to meet the underwater operating environment, the output of the motor must be The shaft is dynamically sealed, and the sealing position needs regular maintenance

Images