Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Casting method of wheel hub of wind turbine generator

A technology for wind turbines and hubs, applied in the field of sand casting and casting, can solve the problems of increased process cost, resin sand pollution, low fatigue strength, etc., and achieve the effects of good mold release, low cost and high adhesion.

Inactive Publication Date: 2012-03-14
辛培兴
View PDF1 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It solves the problems of low fatigue strength and surface micro-crack defects caused by surface sulfurization of castings in the prior art
But it still uses resin sand, the pollution problem of resin sand itself has not been overcome, and it adopts the process of brushing solid paint, which increases the process cost, and the paint contains graphite, and the working environment is poor

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A method for casting a hub of a wind power generator, comprising the steps of:

[0018] 1) Preparation of molding sand: Weigh the following raw materials in parts by weight: 90 parts of old sand, 5 parts of new sand, 1.5 parts of bentonite, 3 parts of pottery clay, 2 parts of iron oxide, and 6 parts of water. Mix in the sand machine for 50 minutes to obtain molding sand;

[0019] 2) Prepare the mold: prepare the model according to the shape of the wind turbine hub, leave a machining allowance, then put the model into the sand box, use the molding sand prepared in step 1) to mold, and the mold is ready for use;

[0020] 3) Smelting and pouring: Prepare scrap steel and pig iron as raw materials; heat the above raw materials to 1510°C, smelt them into raw molten iron, remove the slag, pour the raw molten iron through the ladle into the holding furnace for heat preservation; The original molten iron is subjected to spectral analysis, and the composition of the original mol...

Embodiment 2

[0023] A method for casting a wind turbine hub, comprising the steps of:

[0024] 1) Preparation of molding sand: Weigh the following raw materials in parts by weight: 93 parts of old sand, 3 parts of new sand, 2.5 parts of bentonite, 2 parts of pottery clay, 3 parts of iron oxide, and 4 parts of water. Mix in the sand machine for 80 minutes to obtain molding sand;

[0025] 2) Prepare the mold: prepare the model according to the shape of the wind turbine hub, leave a machining allowance, then put the model into the sand box, use the molding sand prepared in step 1) to mold, and the mold is ready for use;

[0026] 3) Smelting and pouring: Prepare scrap steel and pig iron as raw materials; heat the above raw materials to 1530°C, smelt them into raw molten iron, remove the slag, pour the raw molten iron through the ladle into the holding furnace for heat preservation; The original molten iron is subjected to spectral analysis, and the composition of the original molten iron is a...

Embodiment 3

[0029] A method for casting a wind turbine hub, comprising the steps of:

[0030] 1) Preparation of molding sand: Weigh the following raw materials in parts by weight: 92 parts of old sand, 4 parts of new sand, 2 parts of bentonite, 2.5 parts of pottery clay, 2.5 parts of iron oxide, and 5 parts of water. Mix in the sand machine for 65 minutes to obtain molding sand;

[0031] 2) Prepare the casting mold: prepare the model according to the shape of the wind turbine hub, leave the machining allowance, then put the model into the sand box, use the molding sand prepared in step 1) to mold, and the casting mold will be ready for later use;

[0032] 3) Smelting and pouring: Prepare scrap steel and pig iron as raw materials; heat the above raw materials to 1520°C, smelt them into raw molten iron, remove the slag, pour the raw molten iron through the ladle into the holding furnace for heat preservation; The original molten iron is subjected to spectral analysis, and the composition o...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a casting method of a wheel hub of a wind turbine generator. The method comprises the steps of preparing molding sand, preparing a casting mold, melting, pouring and performing knockout cleaning. In the method, resin sand is not adopted for molding, thereby fundamentally avoiding the impacts on a cast caused by surface sulfurization; in the method, the molding sand which is specially prepared for casting the wheel hub of the wind turbine generation is adopted, wherein bentonite and pottery clay are matched for being used as an adhesive, thereby having the advantages of high binding strength of the molding sand and good air permeability and being good in mold release property. The wheel hub prepared by adopting the method according to the invention is excellent in mechanical properties, the tensile strength is improved by 10-15% in comparison with the prior art, and the elongation rate is improved by 5-6% in comparison with the prior art.

Description

technical field [0001] The invention relates to the field of casting, in particular to the field of sand casting. Background technique [0002] Casting wind turbine (referred to as wind power) hub castings are generally made of resin sand molding, a large number of cold irons are placed at the hot joints, and insulation risers are placed on the top. The operation is complicated, and because the furan resin curing agent is generally benzenesulfonic acid curing agent, resulting Sulfurization leads to low level of surface spheroidization of castings. Although anti-sulfurization coatings are used as shielding, it cannot completely eliminate the low level of surface spheroidization of castings caused by sulphurization, decreased fatigue strength, large tendency of micro-cracks, and poor quality of castings ; Moreover, due to the thin-skinned and large-core structure of wind power castings, the sand-iron ratio is as high as 6:1 or even higher, resulting in high molding costs, incr...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/28B22C1/18
Inventor 辛培兴
Owner 辛培兴
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com