Anti-loose structure for large-sized motor rotator

Abstract

The invention discloses an anti-loose structure for a large-sized high speed (more than 1500 revolutions per minute) motor rotor. According to the principle, a high intensity alloy steel protective ring which is designed is sleeved at the outer edge of a rotor end ring in a thermal mode; the outer end of the protective ring achieves axial positioning through a balanced ring which is sleeved on a shaft in a thermal mode and prevents radial displacement of the protective ring through a spigot of the balanced ring; a taper key (6) is embedded at the groove bottom to be tightly wedged after a rotor conducting bar (5) penetrating into a rotor core (8) and the rotor conducting bar is firmly welded to prevent the rotor conducting bar (5) from generating radial looseness inside a groove; certain gaps are reserved between the end ring (4) and a rotor pressing ring (7) to be used for ventilation and heat dissipation. The anti-loose structure for the large-sized high speed motor rotor has the advantages of preventing the conducting bar end portion and the end ring from performing radial deformation caused by centrifugal force, preventing the conducting bar and the end ring from performing axial displacement caused by conducting bar looseness and avoiding breakage bar, open weld and end ring deformation accidents from happening.

Description

technical field [0001] The invention relates to a motor rotor anti-loosening structure, in particular to a new structure for preventing rotor guide bars from loosening and end rings from loosening and deformation of a large high-speed motor, and belongs to the field of mechanical design. Background technique [0002] The rotor of the existing large-scale high-speed (above 1500 rpm) motor (frame size H710 and above) has no reliable structure to effectively prevent the loosening of the rotor guide bar and the loosening and deformation of the end ring, and the loosening of the rotor guide bar and the loosening and deformation of the end ring often occur In the case of a broken bar, open welding, radial deformation of the end ring, and axial displacement of the end ring, the loosening of the guide bar can cause broken bars, damage to the rotor, sweeping of the motor, and radial deformation of the end ring. In severe cases, it will also cause wear at the end of the stator coil an...

AI Technical Summary

Problems solved by technology

[0002]The rotor of the existing large-scale high-speed (above 1500 r / min) motor (frame size H710 and above) does not effectively prevent the looseness of the rotor guide bar and the loosening and deformation of the end ring The reliable structure of the rotor often leads to loosening of the rotor guide bars and loosening and deformation of the end rings, causing broken bars, open welding, radial deformation of the end rings, and axial displacement of the end rings. The loosening of the guide bars can cause broken bars, It can lead to the damage of the rotor and the sweeping of the motor. When the radial deformation of the end ring is serious, it will also cause the wear of the end of the stator coil and the serious accident that it is difficult to extract the rotor, causing the entire motor to be almost scrapped.

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