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

Low-pressure casting method of AlMg3 aluminum alloy tip air termination machine

A low-pressure casting and lightning-termination technology, which is applied in the field of casting, can solve the problems of poor mechanical properties and low pass rate, and achieve the effects of reducing the amount of machining, smooth and beautiful transition, and simple process

Inactive Publication Date: 2016-12-14
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
View PDF5 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a low-pressure casting method for an AlMg3 aluminum alloy tip air-termination device in order to solve the problems of poor mechanical properties and low pass rate caused by the existing casting method

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Low-pressure casting method of AlMg3 aluminum alloy tip air termination machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Embodiment 1, taking the low-pressure casting of an AlMg3 aluminum alloy tip air-termination device for an SR113 blade (length 55 m) as an example.

[0059] 1) Mold preparation

[0060] After the mold is cleaned, put it into a 40KW resistance heating furnace for preheating (temperature 250 ° C), take it out after 3 hours of heat preservation, and spray paint in the mold cavity (proportion: zinc oxide 10%, water glass 8%, water 82%) , the thickness is about 0.25mm; after scraping the paint on the rounded corners and hot joints, put the mold into a 40KW resistance heating furnace for heating again (the temperature is still 250°C), and the holding time is ≥2h, and it is ready for use.

[0061] 2) Preparation of heat preservation crucible furnace and riser pipe

[0062] Clean up the heat preservation crucible (furnace body and furnace cover) and liquid riser pipe (inner diameter 80mm, wall thickness 20mm), heat it (temperature 250°C), and spray the same proportion of paint...

Embodiment 2

[0077] Embodiment 2, taking the low-pressure casting of an AlMg3 aluminum alloy tip air-termination device for an SR120 blade (length 58 m) as an example.

[0078] 1) As described in Example 1, prepare the mold for use.

[0079] 2) As described in Example 1, prepare the heat preservation crucible furnace and the liquid riser.

[0080] 3) Aluminum molten smelting

[0081] Alloy smelting uses the same AlMg3 aluminum alloy ingot as in Example 1. Put 140kg of AlMg3 aluminum alloy ingot into a 40KW resistance melting furnace and heat it to melt. The melting temperature is 730℃. Press 80g of refining agent to a distance of about 200mm from the bottom of the melting furnace, and move horizontally until no bubbles overflow, then take out the bell jar, and remove the slag on the surface of the melt.

[0082] Then use a rotary degasser to feed argon gas for 12 minutes to degas the aluminum liquid, let it stand for 12 minutes, and finally inject the processed alloy liquid into the hea...

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

PropertyMeasurementUnit
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a low-pressure casting method of an AlMg3 aluminum alloy tip air termination machine. The low-pressure casting method comprises the steps of: (1) mold preparation; (2) insulation of a crucible furnace, insulation of a crucible cover and preparation of a liquid rise pipe; (3) preparation of smelting liquid; (4) mold and low-pressure casting machine installation; (5) low-pressure pouring; and (6) pressure unloading, delay cooling and mold opening for taking. A cast AlMg3 aluminum alloy casting can reach the size precision of CT4-CT6 and the surface smoothness of Ra1.6-3.2 microns; and a threaded connecting part between the casting and an air termination machine in a blade only needs to be machined, so that the mechanical load is largely reduced.

Description

technical field [0001] The invention relates to the field of casting technology, in particular to a low-pressure casting method for an AlMg3 aluminum alloy tip lightning receptor. Background technique [0002] Blades are one of the core components of wind turbines. The efficiency of lightning interceptors installed at the tip of the blades directly affects the stability of the lightning protection system of the blades and the safe operation of the unit. As the generating power of the blades increases (that is, the blades become longer and longer), the requirements for the safety performance of the air-termination at the tip are also getting higher and higher. In addition, with the development of offshore wind power, the problem of salt spray corrosion in the marine environment is more prominent, and higher requirements are placed on the corrosion resistance of the tip air receptor. [0003] The shape of the air-termination at the tip is designed according to different types...

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): B22D18/04
CPCB22D18/04
Inventor 雷竹芳王鹏云刘国元孙晓燕
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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