Low-loss underwater rim propelling device

Abstract

The invention relates to a low-loss underwater rim propelling device. The device comprises a front air guide sleeve and a rear air guide sleeve which are oppositely arranged and are annular structures. The front air guide sleeve and the rear air guide sleeve are arranged at intervals in an axial direction and jointly and rotatably provided with a rim, a permanent magnet is embedded in the middle of an outer wall surface of the rim in a circumferential direction, a sealing plate is installed between the front air guide sleeve and the rear air guide sleeve located on the outer side of the rim, and a gap exists between the inner wall surface of the sealing plate and the outer wall surface of the rim; a plurality of through vent holes are formed in the front air guide cover and the rear air guide cover, orifices in one ends of the vent holes are connected with a gap between the sealing plate and the rim, and the other ends of the vent holes are connected with an external inflation device;a stator seat sleeves a circumference of the sealing plate, a winding is wound on the inner wall surface of the stator seat, and a shell is also arranged between the front air guide sleeve and the rear air guide sleeve on the outer wall of the circumference of the stator seat; and according to a bubble drag reduction principle, a large number of bubbles are formed in the gap during work to achievecooling of a motor and reduction of water friction loss, and the efficiency of the propelling device is greatly improved.

Description

technical field [0001] The invention relates to the technical field of underwater propellers, in particular to a low-loss underwater rim propulsion device. Background technique [0002] The integrated electric rim drive propeller is a highly integrated and modular propeller, which has great potential in terms of noise reduction and efficiency enhancement. The transmission loss and the resistance brought by the motor package, but there is a gap between the rotor rim and the stator, and the gap is filled with seawater during operation, and water friction loss occurs between the propeller rotating rim and the wall, and the front and rear gap ports exist The pressure difference will drive the gap fluid flow, and the gap flow will increase the water friction loss of the rim gap while cooling the motor stator. [0003] For high-power rim-driven motors, the size of the rim is often large, and the water friction loss in the gap area increases with the increase of the size of the ri...

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Problems solved by technology

[0002] The integrated electric rim drive propeller is a highly integrated and modular propeller, which has great potential in terms of noise reduction and efficiency enhancement. The transmission loss and the resistance brought by the motor package, but there is a gap between the rotor rim and the stator, and the gap is filled with seawater during operation, and water friction loss occurs between the propeller rotating rim and the wall, and the front and rear gap ports exist The pressure difference will drive the gap fluid flow, and the gap flow will increase the water friction loss of the rim gap while cooling the motor stator

[0003] For high-power rim-driven motors, the size of the rim is often large, and the water friction loss in the gap area increases with the increase of the size of the rim and the increase of the motor speed, resulting in water friction loss that can account for 20% of the motor power Above, great loss

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