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Production process of cast aluminum iron core capable of reducing stray loss of compressor

A production process and stray loss technology, applied in metal material coating process, electromechanical devices, solid-state diffusion coating, etc., can solve problems such as difficulty in the efficiency of fixed-frequency compressors, and achieve stray loss reduction and motor efficiency improvement. Effect

Inactive Publication Date: 2020-06-05
MAANSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For 0.5mm thick iron loss P 1.5 / 50 The non-oriented silicon steel used for high-efficiency fixed-frequency compressors of about 3.30W / kg, the efficiency of the fixed-frequency compressors produced is generally below 85%. Under the existing iron core shape and winding assembly conditions, it can be improved by reducing iron consumption and copper consumption. Fixed frequency compressor efficiency is already very difficult

Method used

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  • Production process of cast aluminum iron core capable of reducing stray loss of compressor
  • Production process of cast aluminum iron core capable of reducing stray loss of compressor

Examples

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Effect test

Embodiment 1

[0025] A production process of a cast aluminum iron core for reducing the stray loss of a compressor, specifically comprising the following steps:

[0026] 1) The weight percentage of non-oriented silicon steel material used in compressor iron core: Si: 2.08%; Als: 0.19%; Mn: 0.32%; P: 0.06%; C+S+N+Ti: 75ppm, and each element The content is ≤25ppm, and the rest is Fe and unavoidable impurity elements;

[0027] 2) The gap between the convex and concave dies of the cast aluminum hole of the rotor in the single-piece punching die of the stator and rotor is 0.055mm, and the tearing area of ​​the punched section of the cast aluminum hole after punching is 53%, and the burr height is 3.4μm;

[0028] 3) 180 pieces are stacked into iron cores for compressors, and the pieces are connected by riveting;

[0029] 4) The iron core is kept at 750°C for 180min, and the furnace is protected by DX gas, and then slowly cooled at a rate of 4°C / min; the slowly cooled stator and rotor core is kep...

Embodiment 2

[0033] A production process of a cast aluminum iron core for reducing the stray loss of a compressor, specifically comprising the following steps:

[0034] 1) The weight percentage of non-oriented silicon steel materials used in the compressor iron core: Si: 2.01%; Als: 0.21%; Mn: 0.30%; P: 0.05%; C+S+N+Ti: 82ppm, and each element The content is ≤25ppm, and the rest is Fe and unavoidable impurity elements;

[0035] 2) The gap between the convex and concave dies of the rotor cast aluminum hole in the single-piece punching die of the stator and rotor is 0.06mm, the area of ​​the torn area of ​​the punched section of the cast aluminum hole after punching is 58%, and the burr height is 4.5μm;

[0036] 3) 180 pieces are stacked into iron cores for compressors, and the pieces are connected by riveting;

[0037] 4) The iron core is kept at 750°C for 180min, and the furnace is protected by DX gas, and then slowly cooled at a rate of 4°C / min; the slowly cooled stator and rotor core is...

Embodiment 3

[0041] A production process of a cast aluminum iron core for reducing the stray loss of a compressor, specifically comprising the following steps:

[0042] 1) The weight percentage of the chemical composition of non-oriented silicon steel material used in the compressor core: Si: 1.97%; Als: 0.25%; Mn: 0.27%; P: 0.05%; C+S+N+Ti: 76ppm, and each element The content is ≤25ppm, and the rest is Fe and unavoidable impurity elements;

[0043] 2) The gap between the convex and concave dies of the rotor cast aluminum hole in the single-piece punching die of the stator and rotor is 0.065mm, and the tearing area of ​​the punched section of the cast aluminum hole after punching is 62%, and the burr height is 4.7μm;

[0044] 3) 180 pieces are stacked into iron cores for compressors, and the pieces are connected by riveting;

[0045] 4) The iron core is kept at 750°C for 180min, and the furnace is protected by DX gas, and then slowly cooled at a rate of 4°C / min; the slowly cooled stator a...

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Abstract

The invention discloses a production process of a cast aluminum iron core capable of reducing stray loss of a compressor. A silicon steel coil is subjected to slitting, blanking, stacking, heat treatment and aluminum casting to acquire a cast aluminum iron core, wherein the gap between a rotor cast aluminum hole male die and a rotor cast aluminum hole female die is 0.05-0.75 mm. Stator and rotor iron cores are kept for 180 min within the temperature range of 700-800 DEG C, DX gas is adopted for protection in the furnace, slowly-cooled stator and rotor iron cores are kept for 100 min within the temperature range of 400-600 DEG C, and DX gas and saturated steam are adopted for protection in the furnace. Under the condition that silicon steel material of the iron core is not changed, a thicker oxide film is formed on the section of the cast-aluminum hole of the iron core by adjusting the gap of the rotor cast-aluminum hole mold and matching with an iron core heat treatment method, so that a transverse current between the cast-aluminum strip and the iron core material is effectively inhibited. The stator iron core with low iron loss can be produced; the stray loss of the motor is reduced by more than 10% while the iron loss of the stator core is reduced, and the motor efficiency is effectively improved.

Description

technical field [0001] The invention relates to the technical field of application of non-oriented silicon steel, in particular to a production process of a cast aluminum iron core for reducing the stray loss of a compressor. Background technique [0002] Cast aluminum iron core is widely used in small and medium-sized motors and fixed-frequency compressors because of its simple structure and easy manufacture. During the production process of the iron core, the finished silicon steel plate is generally punched into stator and rotor pieces according to a certain shape and size. , and the loose pieces are stacked into stator and rotor cores by riveting. In order to eliminate the punching stress at the edge of the silicon steel sheet and reduce the loss of the motor core, the core will be annealed before assembly. Generally, the stators of small and medium-sized asynchronous motors and fixed-frequency compressors are assembled with copper wire windings, and the rotors are assem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K15/02C22C38/14C22C38/06C22C38/04C22C38/02C21D1/00C23C8/18
CPCH02K15/026C22C38/14C22C38/06C22C38/04C22C38/02C22C38/002C22C38/001C21D1/00C23C8/18
Inventor 刘青松裴英豪施立发何志坚夏雪兰程国庆占云高
Owner MAANSHAN IRON & STEEL CO LTD