A method of profiling a mixed flow vane

By dividing the large mixed-flow blades into upper and lower parts and setting multiple annular air channels inside the sand core, the problems of high difficulty and high cost in shaping large mixed-flow blades are solved, and a more efficient and safer casting process is achieved.

CN117161341BActive Publication Date: 2026-07-03KOCEL STEEL
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Patent Information

Application Number
CN202311249482.X
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-09-26
Publication Date
2026-07-03
Estimated Expiration
2043-09-26

AI Technical Summary

Technical Problem

In the existing technology, small mixed-flow blades are suitable for 3D printing sand core molding, but large mixed-flow blades are not suitable for 3D printing sand core molding, which has problems such as unsuitable parting method, high molding difficulty and high cost.

Method used

Using 3D printing technology, the mixed-flow blade is divided into upper and lower parts, and upper and lower sand cores are made separately. Multi-layer annular air channels are set inside the sand core, and a reasonable parting line and core head structure are designed to reduce the height and mass of the sand core, making it easier to lift and assemble.

Benefits of technology

It reduces the production cost and difficulty of large mixed-flow blades, improves the support strength and air output of sand cores, prevents sand adhesion, and enhances the convenience and safety of manual operation.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present application belongs to the technical field of casting, and mainly relates to a modeling method of a mixed-flow blade, the mixed-flow blade comprising a first end portion and a second end portion, the profile size of the first end portion being smaller than that of the second end portion, the modeling method comprising the following steps: dividing the mixed-flow blade into two halves along the direction from the first end portion to the second end portion for box modeling; and manufacturing an upper box sand core and a lower box sand core, the upper box sand core and the lower box sand core being combined to form a casting cavity of the mixed-flow blade. The sand core is mainly manufactured in a 3D printing manner, and the sand core is divided into a plurality of sand core modules to reduce the height and mass of the sand core, so as to facilitate manual brushing and hoisting. The large mixed-flow blade is divided into an upper portion and a lower portion in a new parting reference manner for casting, so that the division can enhance the support strength of the lower box sand core, reduce the stacking height of the upper box multi-layer sand core, and reduce the positioning difficulty, and the modeling method is more reasonable and more favorable for manual operation, and the cost is significantly reduced.
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Citation Information

Patent Citations

  • 3D-printing sand core moulding method of large-scale hydraulic turbine blade

    CN104416120A

  • Sand core symmetrical setting and box combining method for large hydraulic turbine blades

    CN106077466A