High heat-resistant and high-strength drawing slot wedge and preparation method thereof

A high-strength, high-heat-resistant technology, applied in the direction of electromechanical devices, wind power generation, electrical components, etc., can solve the problems of thermal mechanical performance degradation, motor insulation performance degradation, magnetic slot wedge falling off, etc., to achieve high bending strength and resistance Split strength, increase transverse mechanical strength, improve the effect of adhesive

Active Publication Date: 2017-04-19
HUNAN HENGYUAN NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the insulation grade of most asynchronous wind generators in China is above F grade. If the magnetic slot wedge operates under such working conditions, its thermal mechanical performance will drop significantly, which will easily cause the magnetic slot wedge to fall off, and the insulation performance of the motor will be reduced, which does not meet the requirements of wind power. Long life cycle, high reliability, and simple maintenance performance requirements for generators
[0003] Chinese Invention Patent Publication No. CN101295894A discloses a production method of a magnetic slot wedge grade. Its normal temperature anti-split strength is 1044N / 10mm, its bending strength at 155°C is 132.5MPa, and its bending strength at 180°C is 122.5MPa. It is difficult to meet the normal and thermal mechanical properties. Practical Requirements for Wind Turbine Slot Wedges

Method used

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  • High heat-resistant and high-strength drawing slot wedge and preparation method thereof
  • High heat-resistant and high-strength drawing slot wedge and preparation method thereof
  • High heat-resistant and high-strength drawing slot wedge and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The high heat-resistant and high-strength pull-out slot wedge has an alkali-free glass fiber cloth and an alkali-free glass fiber yarn in a finished product with a weight percentage of 69%, and a cured adhesive with a weight percentage of 31%.

[0019] In the non-alkali glass fiber cloth and the non-alkali glass fiber yarn, the mass percentages of the non-alkali glass fiber cloth and the non-alkali glass fiber yarn are 33% and 67% respectively.

[0020] The adhesive is prepared from the following raw materials by weight percentage: polyimide modified vinyl resin 85%, benzoyl peroxide and tert-butyl peroxybenzoate in the pultrusion initiator are 0.5% and 1.1% respectively, and the demoulding Agent 1.6%, CaCO in filler 3 6%, Al(OH) 3 4%, color paste 1.0%, coupling agent 0.8%.

[0021] Arrange and impregnate the non-alkali glass fiber cloth and non-alkali glass fiber yarn with a weight percentage of 69% in the above-mentioned adhesive in order at room temperature, and co...

Embodiment 2

[0025] The high heat-resisting and high-strength lead slot wedge has an alkali-free glass fiber cloth and an alkali-free glass fiber yarn in a finished product with a weight percentage of 67%, and a cured adhesive with a weight percentage of 33%.

[0026] In the non-alkali glass fiber cloth and the non-alkali glass fiber yarn, the mass percentage ratios of the non-alkali glass fiber cloth and the non-alkali glass fiber yarn are 33% and 67% respectively.

[0027] The adhesive is prepared from the following raw materials: polyimide modified vinyl resin 86%, benzoyl peroxide and tert-butyl peroxybenzoate in the pultrusion initiator are 0.5% and 1.3% respectively, mold release agent 1.6% %, CaCO in filler 3 5%, Al(OH) 3 4%, color paste 0.9%, coupling agent 0.7%.

[0028] Arrange and impregnate the non-alkali glass fiber cloth and non-alkali glass fiber yarn with a weight percentage of 67% in the above-mentioned adhesive in order at room temperature, and control the drawing speed...

Embodiment 3

[0032] The high heat-resistant and high-strength pull-out slot wedge has an alkali-free glass fiber cloth and an alkali-free glass fiber yarn in a finished product with a weight percentage ratio of 66%, and an adhesive weight ratio of 34% after curing.

[0033] In the non-alkali glass fiber cloth and the non-alkali glass fiber yarn, the mass ratios of the non-alkali glass fiber cloth and the non-alkali glass fiber yarn are 33% and 67% respectively.

[0034] The adhesive is formulated from the following raw materials:

[0035] Polyimide modified vinyl resin 87%, benzoyl peroxide and tert-butyl peroxide benzoate in pultrusion initiator are 0.5% and 1.5% respectively, release agent 1.5%, CaCO in filler 3 3%, Al(OH) 3 5%, color paste 0.9%, coupling agent 0.6%.

[0036] Arrange and impregnate the non-alkali glass fiber cloth and non-alkali glass fiber yarn with a weight percentage of 66% in the above-mentioned adhesive in order at room temperature, and control the drawing speed a...

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Abstract

The invention discloses a high-heat-resistant high-strength crosswise slot wedge which is composed of 66-70 wt% of alkali-free glass fiber fabric and alkali-free glass fiber yarn and 30-34 wt% of adhesive. The alkali-free glass fiber fabric is introduced to enhance the transverse mechanical strength of the slot wedge; and the adhesive is improved, so that the slot wedge has excellent performance at high temperature. Especially, the slot wedge still has higher bending strength and cleavage strength at high temperature, respectively reaching 300 MPa and 2500N / 10mm above at 155 DEG C. The slot wedge can completely satisfy the operating requirements of the windmill generator.

Description

technical field [0001] The invention relates to a high heat-resistant and high-strength drawing slot wedge for wind power generator components and a preparation method thereof. The high heat-resistant and high-strength drawing slot wedge is made of glass fiber cloth and glass fiber yarn soaked in adhesive and then pultruded As a result, the mechanical performance of the extraction wedge at high temperature can be greatly improved. Background technique [0002] At present, the insulation grade of most asynchronous wind generators in China is above F grade. When the magnetic slot wedge operates under such working conditions, its thermal mechanical performance will drop significantly, which will easily cause the magnetic slot wedge to fall off, and the insulation performance of the motor will be reduced, which does not meet the requirements of wind power. Generators have long life cycle, high reliability, and simple maintenance performance requirements. [0003] Chinese Invent...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L79/08C08K13/04C08K7/00C08K7/14C08K3/26C08K3/22H02K3/493
CPCC08K3/22C08K3/26C08K7/14C08K13/04C08K2003/2227C08K2003/265C08K2201/014C08L2201/08H02K3/493C08L79/08Y02E10/72
Inventor 高禄生
Owner HUNAN HENGYUAN NEW MATERIAL TECH CO LTD
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