Efficient permanent magnet coupling device for transmission shaft

Abstract

An efficient permanent magnet coupling device for a transmission shaft comprises armature winding rotor disks and adaptive armature winding disk shaft coupling mechanisms, permanent magnet rotor disks and adaptive permanent magnet disk shaft coupling mechanisms and input and output shaft couplings, wherein the armature winding rotor disks comprise armature windings and armature winding installing disks; the permanent magnet rotor disks comprise a group of permanent magnets and a permanent magnet installing disk; the permanent magnets are respectively assembled on the circumference of the permanent magnet installing disk, with N and S poles staggered; the armature winding rotor disks and the permanent magnet rotor disks are, face to face, coaxially installed and are coupled with the corresponding input and output shaft couplings by the adaptive disk shaft coupling mechanisms; and air gaps exist between the armature winding rotor disks and the permanent magnet rotor disks. The device has the characteristics of higher transmission efficiency, simple and reliable structure, convenient installation, resistance to severe environment, tolerance for shaft eccentricity, load isolation, reduction of vibration and noises, prolonging of equipment life, etc, and has the advantages of not damaging the motors and not affecting the safety of power grids.

Description

technical field [0001] The invention relates to the field of motor drive and load speed regulation systems, in particular to an efficient transmission shaft permanent magnetic coupling device. Background technique [0002] At present, energy saving and consumption reduction has become the focus of the whole society and the goal of scientific development. The electricity consumption of the motor system accounts for about 60% of the global electricity consumption, of which the electricity consumption of fans, pumps, compressors and air-conditioning refrigerators account for 10.4%, 20.9%, 9.4% and 6% of the global electricity consumption respectively. The motor system has a large quantity and a wide range, and the potential for power saving is huge. From a domestic point of view, the total installed capacity of various existing motor systems is about 420 million kilowatts, and the operating efficiency is 10-20 percentage points lower than the advanced level abroad, which is eq...

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Problems solved by technology

[0011] The inventors have found that the following problems exist in the above-mentioned permanent magnet coupling torque transmission or driving mechanism: the induced eddy currents generated on the conductor rotor disk have no set flow direction and the disorder of the microscopic metal structure inside the conductor disk, they must be It is disordered, inconsistent and boundless, and the same is true of the fact; similarly, because the magnetic field generated by the induced eddy current has no set flux path, there will be some adjacent and opposite or opposite directions in the magnetic coupling process. The induced magnetic fields generated by the messy induced eddy currents cancel each other out, and because there is no set magnetic flux path, the density of the induced magnetic flux is dispersed, causing a large amount of induced electric energy and magnetic energy to be dissipated on the conductor disk or not fully utilized, making the conductor The rotor disk heats up and leads to a series of more serious consequences, such as: temperature rise, conductor resistivity increases, induced eddy current decreases, magnetic torque also decreases, magnetic torque transmission or driving efficiency is not high; temperature rises, permanent The demagnetization effect of the magnet will also be accelerated, resulting in a reduction in the working life of the permanent magnet coupling and the governor. Recently, more advanced heat dissipation measures have to be taken to dissipate heat. It is more difficult to further increase the power of the magnetic coupler, and the product cost is at the top of the list. high

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