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Preparation process of a large offshore wind power steel ball

A technology of offshore wind power and preparation process, which is applied in the direction of manufacturing tools, metal material coating process, furnace type, etc., can solve the problems of bearing fatigue failure and failure, and achieve the effect of high contact fatigue strength, small deformation and uniform hardness

Active Publication Date: 2021-08-31
浦江中宝机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the horizontal axis wind turbine must yaw to achieve facing the wind. The yaw bearing is an important part of the yaw system. It is located at the bottom of the nacelle, carrying all the mass of the main drive system of the wind turbine and transmitting the aerodynamic force to the tower. Accurately and timely adjust the windward angle of the wind turbine. When the wind turbine starts to deflect, the yaw acceleration will generate a large moment. At the same time, the yaw gear will also bear a considerable gyro force, which will easily cause fatigue failure of the bearing.
According to the working characteristics of the bearing of the unit, the bearing should have high reliability, flexible operation, prevent sea salt spray and have a life span of more than 20 years. As for the pitch bearing of the unit, it will also bear a large rotational moment during work, and it is prone to premature failure

Method used

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  • Preparation process of a large offshore wind power steel ball
  • Preparation process of a large offshore wind power steel ball
  • Preparation process of a large offshore wind power steel ball

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A preparation process for large-scale offshore wind power steel balls, the specific steps of which include:

[0035] Ingot casting, after smelting molten iron, add 0.35% carbon, 3.22% chromium, 1.2% nickel, 0.18% niobium, 0.12% titanium, 0.10% tungsten, 0.22% silicon, 0.7% manganese, 0.06% molybdenum, 0.23% aluminum, 0.08% Boron, 0.35% vanadium, 0.09% yttrium, 0.05% copper, the melting temperature is 1500°C, and cast into a spherical ingot after melting;

[0036]Quenching, quenching the cast spherical ingot, first heating the spherical ingot to 1100°C, keeping it warm for 10 minutes, then cooling it down to 950°C at a cooling rate of 3.6°C / s, keeping it warm for 20 minutes, and then water quenching to room temperature, characterized in that Water quenching uses a wear-resistant workpiece quenching agent;

[0037] Light ball, put the quenched spherical ingot into the light ball machine for light ball treatment;

[0038] Nitrogen treatment, add the ingot of the photosph...

Embodiment 2

[0050] A preparation process for large-scale offshore wind power steel balls, the specific steps of which include:

[0051] Ingot casting, after smelting molten iron, add 0.42% carbon, 3.42% chromium, 1.5% nickel, 0.25% niobium, 0.18% titanium, 0.16% tungsten, 0.33% silicon, 0.9% manganese, 0.09% molybdenum, 0.37% aluminum, 0.12% Boron, 0.45% vanadium, 0.13% yttrium, 0.1% copper, the melting temperature is 1580°C, and cast into spherical ingots after melting;

[0052] Quenching, quenching the cast spherical ingot, first heating the spherical ingot to 1130°C, keeping it warm for 15 minutes, then cooling it down to 980°C at a cooling rate of 4.5°C / s, keeping it warm for 25 minutes, and then water quenching to room temperature, characterized in that Water quenching uses a wear-resistant workpiece quenching agent;

[0053] Light ball, put the quenched spherical ingot into the light ball machine for light ball treatment;

[0054] Nitrogen treatment, add the ingot of the photosphe...

Embodiment 3

[0066] A preparation process for large-scale offshore wind power steel balls, the specific steps of which include:

[0067] Ingot casting, after smelting molten iron, add 0.58% carbon, 3.62% chromium, 1.8% nickel, 0.37% niobium, 0.26% titanium, 0.22% tungsten, 0.43% silicon, 1.2% manganese, 0.12% molybdenum, 0.34% aluminum, 0.16% Boron, 0.55% vanadium, 0.16% yttrium, 0.15% copper, the melting temperature is 1650°C, and cast into a spherical ingot after melting;

[0068] Quenching, quenching the cast spherical ingot, first heating the spherical ingot to 1150°C, keeping it warm for 18 minutes, then cooling it down to 1000°C at a cooling rate of 5°C / s, keeping it warm for 28 minutes, and then water quenching to room temperature, characterized in that Water quenching uses a wear-resistant workpiece quenching agent;

[0069] Light ball, put the quenched spherical ingot into the light ball machine for light ball treatment;

[0070] Nitrogen treatment, add the ingot of the photosph...

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Abstract

The invention relates to the field of bearing preparation, in particular to a preparation process of a large-scale offshore wind power steel ball; including: ingot casting, quenching, light ball, nitrogen treatment, hard grinding, screening and lapping; a large-scale steel ball of the present invention The preparation process of offshore wind power steel balls, the present invention provides a bearing steel ball with high contact fatigue strength, high wear resistance, high elastic limit, high impact toughness, good dimensional stability and good corrosion resistance , this kind of steel ball optimizes the composition ratio of the embryo body and improves the uniformity of the heat treatment process. The invention applies the research of various technologies for detecting steel ball surface defects and internal crack defects to ensure the zero defect rate of steel balls; it is a kind of It is suitable for large-scale offshore wind turbines working in harsh environments such as wind, sand, rain, salt spray, and humidity in the wild high-altitude environment, and can ensure stable, safe and reliable operation for a long time.

Description

technical field [0001] The invention relates to the field of bearing preparation, in particular to a preparation process of large offshore wind power steel balls. Background technique [0002] Due to its environmental protection, wind power generation has been highly valued by various countries in the world in recent years, and the situation of wind power industry has developed quite rapidly. my country's wind power market needs about 30 million special steel balls for wind power bearings, and the international market needs about 1.5 billion. Therefore, special steel balls for wind power generation have broad market prospects. [0003] CN105805173B discloses a high-corrosion-resistant hub bearing unit, which includes a flange, and the flange includes a circumferential flange and a cylindrical part provided on the front side of the circumferential flange and equipped with an outer ring and an inner ring. The head end of the cylindrical part is provided with a riveting secti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/48C22C38/50C22C38/44C22C38/46C22C38/54C22C38/42C22C38/02C22C38/04C22C38/06C21D9/36C21D1/18C21D1/60C23C8/26
CPCC21D1/18C21D1/60C21D9/36C22C38/005C22C38/02C22C38/04C22C38/06C22C38/42C22C38/44C22C38/46C22C38/48C22C38/50C22C38/54C23C8/26
Inventor 张贤南
Owner 浦江中宝机械有限公司
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