Motor rotor, motor and motor rotor installation method

Abstract

The invention discloses a motor rotor, a motor and a method for installing the motor rotor. The motor rotor includes a rotor house, and the rotor house has a cylindrical cavity extending axially along the rotor house. It is characterized in that the motor rotor also includes a plurality of rotor cores and a plurality of bridging ribs, the rotor core and bridging ribs are ring-shaped, and the outer peripheral surface of the rotor core and the outer peripheral surface of the bridging ribs are attached to the inner peripheral surface of the cylindrical cavity; multiple rotor cores and a plurality of bridging ribs are arranged at intervals along the axial direction of the cylindrical cavity, the sides of the bridging ribs press against the rotor core on the same side, and the bridging ribs are fixed in the cylindrical cavity by welding. The motor rotor of the invention avoids the risk caused by bolt looseness, and enhances the reliability of the rotor iron core. The outer peripheral surface of the rotor core can completely fit the inner peripheral surface of the rotor house, and the structural integrity is very good, which reduces the risk of local micro-vibration.

Description

technical field [0001] The invention relates to the field of motors, in particular to a motor rotor, a motor and a method for installing the motor rotor. Background technique [0002] The permanent magnet motor provides a magnetic field by installing multiple sets of permanent magnet modules on the inner wall of the outer rotor as its magnetic poles. In order to reduce the various corrosions of the permanent magnets and improve the efficiency and life of the permanent magnets, the permanent magnets are usually packaged and made into magnetic pole modules. In existing permanent magnet motors, in order to reduce power loss, a rotor core is usually provided between the inner wall of the outer rotor and the magnetic pole module. The rotor core is generally a laminated silicon steel sheet. Due to the large size of the outer rotor of a large motor, the required rotor core is relatively large in size and heavy in weight. Generally, it is fixed by opening dovetail grooves on the in...

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a motor rotor, a motor and a method for installing the motor rotor in order to overcome the high cost of installing the rotor core in the motor rotor and the defects that the bolts are easy to fall off in the prior art

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