Solid rotor structure of asynchronous motor

Abstract

The invention relates to a solid rotor structure of an asynchronous motor. A rotor conducting bar 4 is arranged in an open conducting bar groove 8 of the rotor body 1, an end ring 2 is arranged at theend part of a squirrel cage structure formed by welding the connecting ring 3 and the rotor conducting bar 4, the inner circular surface of the end ring 2 is in interference fit with the outer circular surface of the end part of the squirrel cage structure, and a plurality of sections of embedded snap ring hooping structures 5 are arranged along the axial dimension direction of the rotor body 1.According to the structure, the problems of structural feasibility, structural stability and rigidity of the solid rotor with high working rotating speed, large axial size or large length-diameter ratio are solved, the technological process is simple, and the application range of the solid rotor is expanded. The structure can meet the structural requirements of a solid rotor with a high working speed, a large axial size or a large length-diameter ratio.

Description

technical field [0001] The invention relates to a solid rotor structure of an asynchronous motor. Background technique [0002] Compared with laminated rotors of the same size and specifications, solid rotors have better overall structural strength, higher critical speed and lower rotor deflection, and are easier to achieve better starting performance. Therefore, they are widely used in Motor technology field. With the development of large-scale and high-power motors, higher requirements are put forward for the structural rigidity and strength of solid rotors used in this field. The rotor core must have a larger axial dimension or a larger aspect ratio. . According to the installation type of the rotor guide bar, the existing solid rotor structure mainly includes a closed guide bar groove structure, a rectangular open guide bar groove structure and an inverted trapezoidal open guide bar groove structure. Due to the limitations of the current manufacturing process, the clo...

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Problems solved by technology

Due to the limitations of the current manufacturing process, the closed guide bar groove structure is only suitable for solid rotors with small axial dimensions; the existing rectangular open guide bar groove structure is only applied to copper rotor bodies, which are limited by the strength and elastic modulus of copper materials. It is difficult to apply to solid rotors with high operating speed, large axial size or large length-to-diameter ratio; the existing inverted trapezoidal opening guide bar groove structure is difficult to process. Under the premise of ensuring accuracy, it is currently mainly used in small axial Dimensions of the solid rotor

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