Pouring method of hollow turbine guide vane

A technology for turbine guide vanes and pouring methods, which is applied to casting molding equipment, molds, cores, etc., can solve the problems of hot cracking and loose defects of castings, uneven stress, and high rejection rate, and can solve the problem of hot cracking. problems, uniform temperature field, and the effect of improving efficiency

Active Publication Date: 2015-01-28
AECC AVIATION POWER CO LTD
View PDF6 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The hollow turbine guide vane adopts the combination of top injection and bottom injection to produce this type of casting. After the wax model is made, the entire shell is wrapped with a layer of ceramic wool, and the casting is carried out in a set temperature field. Due to the limitation of the shell during casting, , it is necessary to limit the temperature of the mold shell and increase the pouring temperature. Although this process scheme can reduce the porosity of the

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
  • Pouring method of hollow turbine guide vane
  • Pouring method of hollow turbine guide vane
  • Pouring method of hollow turbine guide vane

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0024] The present invention will be further described in detail below in conjunction with specific embodiments, which are explanations of the present invention rather than limitations.

[0025] A casting method for a hollow turbine guide vane of the present invention comprises the following steps,

[0026] 1) Manufacture wax pattern combination;

[0027] 2) Make a shell on the wax pattern combination to obtain a hollow turbine guide vane shell, such as figure 1 shown;

[0028] 3) Wrap the leaf body of the shell with a layer of ceramic thermal insulation cotton, and then wrap the entire shell with two layers of ceramic cotton. The structure is as follows: figure 2 Shown; put the processed shell into the roasting furnace for casting; the casting shell temperature is 1065-1085°C during pouring, and the pouring temperature is 1460-1480°C. Wherein, the thickness of the ceramic thermal insulation cotton is 6-9 mm, and this preferred example takes 6 mm as an example for illustra...

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 provides a pouring method of a hollow turbine guide vane. The pouring method comprises the following steps: (1) manufacturing a wax mold combination; (2) carrying out shell making on the wax mold combination to obtain a hollow turbine guide vane shell; (3) covering one layer of ceramic heat-preservation cotton on a shell vane body part; covering two layers of ceramic cotton on the whole shell; and putting the treated shell into a roasting furnace and carrying out casting, wherein in a casting process, the temperature of casting the shell is 1065-1085 DEG C and the pouring temperature is 1460-1480 DEG C. According to the pouring method of the hollow turbine guide vane, a pouring system of the hollow turbine guide vane is not changed and the shell temperature and the pouring temperature are adjusted so that the casting temperature field is changed; the two layers of ceramic cotton on the whole body and one layer of the ceramic heat-preservation cotton on the vane body part are matched so that after the temperature of the whole shell is improved, the temperature field is uniform, the casting stress is eliminated and the casting temperature is reduced; and furthermore, the temperature field on a casting vane body and an edge plate keeps uniform, the shell is effectively insulated and the casting stress is eliminated.

Description

technical field [0001] The invention relates to the technical field of precision casting, in particular to a pouring method for a hollow turbine guide vane. Background technique [0002] In the prior art, investment casting without margin is currently the best method for manufacturing turbine blades. Its technological process mainly includes the design and manufacture of core molds, pressed cores, design and manufacture of wax molds, assembly and injection of wax, slurry shell making, drying shells, dewaxing, sintering, pouring metal, shelling and core removal , Laser drilling and other links. The hollow turbine guide vane adopts the combination of top injection and bottom injection to produce this type of casting. After the wax model is made, the entire shell is wrapped with a layer of ceramic wool, and the casting is carried out in a set temperature field. Due to the limitation of the shell during casting, , It is necessary to limit the temperature of the mold shell and ...

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
IPC IPC(8): B22C9/04B22C9/22B22C9/08
CPCB22C9/04B22C9/082B22C9/22
Inventor 朱珍珠王琳赵儒梁马李朝海潮常涛岐李长青曾乐
Owner AECC AVIATION POWER CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap