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

Guiding blade mold and design method for contraction thereof

A guide vane and mold shrinkage technology, which is applied in the field of precision casting, can solve the problems of prolonged delivery period, inability to open the mold, and out-of-tolerance blade throat area, and achieve the goal of solving mold opening interference, promoting engineering application, and improving design technology Effect

Active Publication Date: 2020-08-25
AECC AVIATION POWER CO LTD
View PDF9 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention patent titled a shrinkage rate design method for a multi-blade guide vane precision casting mold discloses a mold design method for setting different shrinkage rates in three directions with large differences in size for turbine guide vanes, which effectively solves the problem. In the past, the throat area of ​​the guide vane was out of tolerance caused by a single shrinkage rate, but this method has the following three problems: First, the multiple joints caused by setting different shrinkage rates in the direction of the edge plate and blade body during mold design. The angle between the blades changes, and angular compensation is required to ensure that the throat area of ​​the blade is qualified; second, due to the different shrinkage ratios set in the direction of the edge plate and the blade body during mold design, the flow surface of the upper edge plate and the lower edge plate The pot mold and the back mold cannot be opened due to the change from a round surface to an elliptical surface; third, in order to ensure the normal mold opening of the mold, it is necessary to rework the mold to remove the obstructing parts, resulting in the size of the runner surface being out of tolerance
[0005] In summary, the shrinkage rate design method of the multi-blade guide vane precision casting mold mentioned above results in an increase in production costs and a prolonged delivery period. Therefore, it is urgent to explore a design method for the shrinkage of turbine guide vane molds without allowance to effectively Ensure that the size is qualified, reduce the repair of the mold, shorten the trial production cycle, and promote the improvement of the precision casting technology of the turbine guide vane

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
  • Guiding blade mold and design method for contraction thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] A slender five-joint equiaxed crystal turbine guide vane of an engine blade:

[0054] Step 1, set parameters

[0055] The length of the blade body is A=225mm; the length direction of the blade is the R direction, which coincides with the coordinate axis Z axis, and the shrinkage rate is ψ1=2.4%;

[0056] The chord length direction of the upper and lower edge plates is the L direction, which coincides with the X axis of the coordinate axis, and the shrinkage rate is ψ2=1.8%;

[0057] The width direction of the upper and lower edge plates is the D direction, which coincides with the coordinate axis Y axis, and the shrinkage rate is ψ3=1.8%.

[0058] Step 2, mold shrinkage setting method

[0059] Taking the origin of the blade engine as the center of the circle, the blade is enlarged as a whole according to the shrinkage rate of 1.8%. The shrinkage rate given in the direction of the blade body is 0.6% smaller than the actual shrinkage rate, and the length of the blade bo...

Embodiment 2

[0062] A single-connected equiaxed crystal turbine guide vane with short blade body and large edge plate in an engine:

[0063] Step 1, set parameters

[0064] The blade body length is A=110mm;

[0065] The length direction of the blade is the R direction, which coincides with the coordinate axis Z axis, and the shrinkage rate is ψ1=1.8%;

[0066] The chord length direction of the upper and lower edge plates is the L direction, which coincides with the X axis of the coordinate axis, and the shrinkage rate is ψ2=2.2%;

[0067] The width direction of the upper and lower edge plates is the D direction, which coincides with the coordinate axis Y axis, and the shrinkage rate is ψ3=2.2%.

[0068] Step 2, mold shrinkage setting method

[0069] Taking the origin of the blade engine as the center of the circle, the blade is enlarged as a whole according to the shrinkage rate of 2.2%. The shrinkage rate given in the direction of the blade body is 0.4% larger than the actual shrinkage...

Embodiment 3

[0071] A single directionally solidified turbine guide vane with the same size as the airfoil and edge plate of an engine:

[0072] Step 1, given parameters

[0073] The blade body length is A=180mm;

[0074] The length direction of the blade is the R direction, which coincides with the coordinate axis Z axis, and the shrinkage rate is ψ1=1.6%;

[0075] The chord length direction of the upper and lower edge plates is the L direction, which coincides with the X axis of the coordinate axis, and the shrinkage rate is ψ2=2.1%;

[0076] The width direction of the upper and lower edge plates is the D direction, which coincides with the coordinate axis Y axis, and the shrinkage rate is ψ3=2.1%.

[0077] Step 2, mold shrinkage setting method

[0078] Taking the origin of the blade engine as the center of the circle, the blade is enlarged as a whole according to the shrinkage rate of 2.1%. The shrinkage rate given in the direction of the blade body is 0.5% larger than the actual shr...

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 provides a guiding blade mold and a design method for contraction thereof. The method comprises the steps that: Step 1: a determined guiding blade mold is enlarged as a whole according to a contraction rate of chord lengths of an upper marginal plate and a lower marginal plate, and an enlarged guiding blade mold is obtained; and Step 2: the length of a blade body in the enlarged guiding blade mold and the length of the blade body after being enlarged according to the contraction rate thereof are compared; when the length of the blade body in the enlarged guiding blade mold is smaller than the length of the blade body after being enlarged according to the contraction rate thereof, the length of the blade body is first extended, reduced thickness of the upper marginal plate andthe lower marginal plate is caused at the same time, and then thickening treatment is conducted to the upper marginal plate and the lower marginal plate; when the length of the blade body in the enlarged guiding blade mold is larger than the length of the blade body after being enlarged according to the contraction rate thereof, the length of the blade body is first shortened, increased thicknessof the upper marginal plate and the lower marginal plate is caused at the same time, and then thickness reduction treatment is conducted to the upper marginal plate and the lower marginal plate; andtherefore, the design of contraction of the guiding blade mold is completed and manufacturing of the guiding blade mold is conducted.

Description

technical field [0001] The invention belongs to the technical field of precision casting, in particular to a guide vane mold and a shrinkage design method thereof. Background technique [0002] The turbine guide vane is composed of blade body, upper edge plate and lower edge plate. The central axis of the upper edge plate flow channel surface and the lower edge plate flow channel surface center axis are the engine axis. The runner surface of the lower edge plate is formed by the basin mold and the back mold of the wax mold. The basin mold and the back mold are led out through the arc-shaped slideway set on the lower template. In the arc direction of the type block, the central axis of the slideway coincides with the central axis of the engine. [0003] With the continuous improvement of thrust-to-weight ratio requirements of the engine, the design requirements for blade body length, twist and edge plate size of the turbine guide vane without margin increase, and the difficu...

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): B22C9/04B22C9/22
CPCB22C9/04B22C9/22
Inventor 孙礼娜汪国峰段朋国李杨阳任翠东苏航周宝玲徐宁虎
Owner AECC AVIATION POWER CO LTD
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