Full-sea-depth brushless direct-current electric propeller with rotary cartridge mechanical seal device

Abstract

Provided is a full-sea-depth brushless direct-current electric propeller with a rotary cartridge mechanical seal device in the technical field of deep sea exploration. The full-sea-depth brushless direct-current electric propeller comprises the rotary cartridge mechanical seal device, a propeller shell, a guide pipe paddle, a brushless direct-current motor and a rotary transformer. The rotary cartridge mechanical seal device and a transmission shaft of the brushless direct-current motor are in axial sealing connection, the rotary transformer collects the rotating speed of the transmission shaft, and outputs rotating speed information through a transmission line of an electrohydraulic interface, the propeller shell and a stator of the brushless direct-current motor are assembled through interference fit, and the front end of the propeller shell and the guide pipe paddle are connected through a connecting support fixedly connected with a transitional flange. The rotary cartridge mechanical seal device is adopted, sealing materials are high in hardness and good in wear resisting performance, high temperature resisting performance and corrosion resisting performance, and the sealing structure is novel in structure, simple and reasonable in combination, small in size and good in sealing effect, so that the propeller has the work capacity within the full-sea-depth range of 0 m to 11,000 m.

Description

technical field [0001] The invention relates to a device in the technical field of deep-sea exploration, in particular to a full-sea deep-sea brushless DC electric thruster with a rotating cartridge mechanical seal. Background technique [0002] Electric propulsion devices and high-pressure seawater pumps are important components of deep-sea submersibles, and underwater motors are the key to these underwater electromechanical devices. The underwater motor based on DC brushless motor has the advantages of large power to volume ratio, high torque and high efficiency. The dynamic seal of the shaft has always been the key technology of submersible motors, and the failure rate of submersible motors due to sealing has always been high. Since the motor rotates under water pressure, the higher the water pressure and the higher the rotating speed, the easier it is to leak between the shaft and the casing. At present, the motors of most underwater electric devices work in shallow wa...

AI Technical Summary

Problems solved by technology

This technology has a high degree of drive integration, which is not conducive to the modular development of submersibles. Moreover, the sealing structure is relatively simple, and it is difficult to reach the diving depth of 10,000 meters, so it cannot be applied to deep-water submersibles in the whole sea.

[0004] Chinese Patent Document No. CN102832749A Publication (Announcement) Day 2012.12.19 discloses an oil-filled pressure-compensated deep-sea motor and its manufacturing method. A pressure compensator with a piston is connected to the tail end of the permanent magnet brushless DC motor, and Make the inner cavity of the permanent magnet brushless DC motor and the pressure compensator communicate with each other, and at the same time make the anti-deformation strength of the end shell of the pressure compensator close to the end face of the piston be smaller than the anti-deformation strength of the permanent magnet brushless DC motor shell, and then The cavity of the permanent magnet brushless DC motor and pressure compensator is filled with insulating hydraulic oil; this technology mainly adopts oil-filled pressure compensation method, but the sealing structure is relatively simple, the sealing circuit is not comprehensive enough, and it is difficult to reach the depth of 10,000 meters, so it cannot be applied All-sea bathyscaphe

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