Magnetic coupler

Abstract

The present invention relates to a magnetic coupler which comprises a conductor rotor disc and a permanent magnetic rotor disc. The conductor rotor disc comprises a driving side conductor disc and a driven side conductor disc which are fixedly connected through a bolt. The permanent magnetic rotor disc is arranged between the two conductor discs. Fixed air gaps are maintained between the permanent magnetic rotor disc and the conductor discs. The permanent magnetic rotor disc is fixedly provided with a load flange. The magnetic coupler is characterized in that the outer circle of the load flange is sleeved by a bearing which comprises an inner ring and an outer ring. The inner ring of the bearing and the outer circle of the load flange are in interference fit, and the outer ring of the bearing is connected to the outer side of the driven side conductor disc through a connection piece. The magnetic coupler has the advantages that the air gap constancy between the conductor discs and the permanent magnetic disc can be maintained.

Description

technical field [0001] The invention relates to the technical field of power transmission, in particular to a magnetic coupling. Background technique [0002] The magnetic coupling realizes the torque transmission from the motor to the load through the air gap between the conductor disk and the permanent disk. Due to its high reliability, simple equipment structure, and low failure rate, it is widely used in mines and factories. In order to ensure a higher transmission efficiency, the air gap between the conductor disk and the permanent disk should be smaller in theory, but in fact, due to processing and assembly technology reasons, a certain air gap must generally be guaranteed to avoid Mechanical friction occurs during operation. For a coupler with a large power, such as a 400KW fan load used in mines, due to the consideration of displacement during high-speed rotation, the air gap should generally be reserved at 5-8 mm. However, in actual operation, the axial movement f...

AI Technical Summary

Problems solved by technology

However, in actual operation, the axial movement from the motor end is inevitable, especially the shaft movement of the motor will reach the maximum within a few seconds after starting up, and due to the rotational speed between the conductor disk and the permanent disk during the start-up phase The gap is the largest, if mechanical friction occurs between the two, it will immediately cause damage to the permanent disk due to frictional heat or reduce transmission performance

The equipment damage caused by this is relatively frequent, and on-site maintenance is very inconvenient, and may cause greater losses due to production stoppage, and such large equipment is sent back to the factory for maintenance, which will delay its use even more.

If the air gap between the conductor disk and the permanent disk is set too large for this purpose, although friction can be avoided, the loss of energy transmission will be large, which is also a very undesirable solution

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