Modular magnetic coupling for underwater propeller

Abstract

The invention provides a modular magnetic coupling for an underwater propeller and belongs to the technical field of coupling devices. The modular magnetic coupling comprises an input shaft, a female connector, a female magnet, a male magnet, a male connector, an output shaft and a spacer sleeve and is characterized in that one end of the input shaft is fixedly connected with the female connector through a screw, and the female magnet is arranged on the surface of the inner wall of the female connector; one end of the output shaft is connected with the male connector, the male magnet is arranged on the surface of the outer wall of the male connector, and the spacer sleeve is arranged between the female connector and the male connector. The modular magnetic coupling has the advantages that a wedge-shaped permanent magnet which has the characteristics of tile-shaped permanent magnets and the characteristics of square permanent magnets is adopted creatively, so that the magnetizing direction can be changed and the direction of the magnetic line of force can be changed gradually, the magnetic flux density of an air gap of the device is maximized so that driving torque can be improved, and meanwhile, the situation that the permanent magnet is thrown away during high-speed rotation can be effectively prevented.

Description

Technical field [0001] The invention relates to the technical field of coupling devices, in particular to a modular magnetic coupling coupling for underwater propulsion. Background technique [0002] Coupling is a device used to connect two shafts to realize simultaneous rotation of the driving shaft and the driven shaft. It is widely used in various mechanical devices. The traditional coupling is to make the two shafts directly contact to transmit torque through a certain connection method, but because the driving shaft and the driven shaft need to work in two different media, it is easy to cause leakage at the connection. ; If a sealing element is used to seal it, the rotation resistance is increased because the seal is a dynamic seal. In addition, as the sealing element wears, there will still be leakage problems. The non-contact magnetic coupling coupling utilizes the interaction force between permanent magnets (different poles attract, same poles repel) to realize torque tr...

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Problems solved by technology

[0003] The shape of the magnet in the radial magnetic coupling synchronous coupling is currently tile-shaped and square. The domestic products are mostly tile-shaped. This type of permanent magnet can obtain a uniform annular air gap. The cylindrical shape and The shape of the isolation cover matches, which can increase the transmission torque, but this form can only be used for radial magnetization; square permanent magnets are mostly used in some foreign products. This form can change the direction of magnetization at will, and is easy to install. But the transmission torque is not as good as the tile shape

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