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Heat treatment process for iron core of motor

A motor and heat treatment technology, applied in heat treatment furnaces, heat treatment equipment, manufacturing tools, etc., can solve the problems of destroying sheet-to-sheet insulation, reducing output power, and easily scratching the protective layer, so as to eliminate surface stress and reduce input power , to eliminate the effect of isotropy

Active Publication Date: 2012-07-18
青岛海联金汇电机有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the stator and rotor cores made in this way have great defects: first, during the production, transportation, cutting, and punching of silicon steel coils, the protective layer on the surface of the silicon steel sheet is easily scratched, destroying the gap between the sheets and the sheets. The insulation between the cores will cause a potential difference inside the iron core when the motor is running, thereby converting electrical energy into internal energy and increasing the input power. Under the current, the iron core generates heat, which reduces the output power and reduces the efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Motor core heat treatment process, the heat treatment equipment includes annealing furnace, DX generation furnace, the specific steps

[0017] The steps are: (The following parameters are set using the commonly used chain heat treatment furnace as an example)

[0018] 1. Turn on the annealing furnace and raise the temperature to remove moisture.

[0019] 2. Set process parameters:

[0020] Annealing furnace temperature (first stage) 720°C; annealing furnace temperature (second stage) 770°C; annealing furnace temperature (third stage) 780°C; annealing furnace temperature (fourth stage) 780°C; annealing furnace temperature (fifth stage) 730°C; The temperature in the chemical zone is 720°C; the temperature in the cooling zone (first stage) is 680°C; the temperature in the cooling zone (second stage) is 560°C; the temperature in the cooling zone (third stage) is 480°C;

[0021] 3. The DX generating furnace ignites and passes DX gas. When the temperature in the annealing ...

Embodiment 2

[0029] This embodiment is basically the same as Embodiment 1, the difference is that the process parameters are set differently, and the process parameters in this embodiment are set as: annealing furnace temperature (one stage) 700°C; annealing furnace temperature (second stage) 750°C ;Annealing furnace temperature (three sections) 760°C; annealing furnace temperature (four sections) 760°C; annealing furnace temperature (five sections) 710°C; (Second section) 540°C; cooling zone temperature (third section) 460°C; mesh belt speed: 50-55mm / min.

[0030] Other parts of this embodiment are the same as those of Embodiment 1, and will not be repeated here.

Embodiment 3

[0032] This embodiment is basically the same as Embodiment 1, except that the process parameters are set differently. The process parameters in this embodiment are set as: annealing furnace temperature (first stage) 740°C; annealing furnace temperature (second stage) 790°C ;Annealing furnace temperature (three sections) 800°C; annealing furnace temperature (four sections) 800°C; annealing furnace temperature (five sections) 750°C; (second stage) 560°C; cooling zone temperature (third stage) 500°C; mesh belt speed: 50-55mm / min.

[0033] Other parts of this embodiment are the same as those of Embodiment 1, and will not be repeated here.

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PUM

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Abstract

The invention discloses a heat treatment process for an iron core of a motor and belongs to the technical field of the manufacture of motors. The process comprises the following steps of: (1) raising the temperature of an annealing furnace, and introducing DX gas into the annealing furnace after the temperature of an annealing zone of the annealing furnace is raised to 690 to 730 DEG C; (2) placing a motor iron core to be treated on a conveying belt of the annealing furnace for heating treatment; (3) introducing saturated steam into a bluing zone of the annealing furnace to ensure that the iron core which is subjected to heating treatment and enters the bluing zone is blued; and (4) cooling the iron core which is blued, and taking out. By the heat treatment process, the surface stress of iron core sheets is eliminated, the isotropy and residual magnetism are eliminated, the input power of the iron core is reduced, a damaged oxide film is repaired through bluing treatment, and the insulation between the sheets is increased; and C in an unstable valence state in a sheet material is displaced through reducing gas, so that the structural compactness of the material is improved, the stability of the material is increased, and the efficiency of the iron core is improved.

Description

technical field [0001] The invention relates to the processing of motor iron core, especially the heat treatment process of motor iron core. Background technique [0002] At present, the stator and rotor cores of motors are directly punched and laminated with silicon steel plates. However, the stator and rotor cores made in this way have great defects: first, during the production, transportation, cutting, and punching of silicon steel coils, the protective layer on the surface of the silicon steel sheet is easily scratched, destroying the gap between the sheets and the sheets. The insulation between the cores will cause a potential difference inside the iron core when the motor is running, thereby converting electrical energy into internal energy and increasing the input power. Under this condition, current is generated, and the iron core generates heat, which reduces the output power and efficiency. Contents of the invention [0003] Aiming at the above-mentioned defec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D9/00C21D1/74C21D1/26H02K15/02
Inventor 王志强张刚邴兆虹孟庆亮吴芝荣王珍超宗光叶
Owner 青岛海联金汇电机有限公司
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