Motor rotor and magnetic suspension motor

Abstract

The invention provides a motor rotor and a magnetic suspension motor. The motor rotor comprises a rotating shaft, the rotating shaft is provided with a hollow cylinder section, the peripheral side of the cylinder wall of the hollow cylinder section is sleeved with a sheath in an interference manner, the inner side of the cylinder wall of the hollow cylinder section is connected with magnetic steel in an interference manner, and a first cooling pipeline is arranged between the sheath and the cylinder wall of the hollow cylinder section. According to the invention, the temperature rise of the sheath is effectively reduced, so that the deformation of the sheath and the eccentricity and vibration of the rotor are reduced; and meanwhile, a double-layer interference fit mode is adopted, the stress of the sheath is dispersed to the rotating shaft, the equivalent stress of the sheath can be effectively reduced, the deformation degree of the sheath can be effectively reduced, abnormal vibration caused by eccentricity of the rotor is reduced, and the suspension precision and stability of the motor rotor are improved.

Description

technical field [0001] The invention belongs to the technical field of motor manufacturing, and in particular relates to a motor rotor and a magnetic levitation motor. Background technique [0002] The magnetic levitation motor uses the electromagnetic force of the magnetic levitation bearing to suspend the motor rotor in the air, so that there is no mechanical contact between the motor rotor and the motor stator, and there is no mechanical friction. It is a low-loss, high-performance motor. While realizing the high speed of the motor rotor, it also has the advantages of no mechanical wear, low energy consumption, low noise, long life, no lubrication and sealing, no oil pollution, etc. The rotor speed of the magnetic levitation motor is only limited by the tensile strength of the rotor material. Therefore, the peripheral speed of the magnetic levitation motor rotor can be very high, and it is more and more widely used in high-speed equipment. [0003] The traditional hidden...

AI Technical Summary

Problems solved by technology

[0009] Therefore, the present invention provides a motor rotor and a magnetic levitation motor to overcome the deficiencies in the prior art, such as large deformation, rotor eccentricity, poor suspension accuracy, and vibration due to the large temperature rise of the sheath during the high-speed operation of the rotor.

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