Hollow turbine blade ceramic core removal device based on heat convection principle

A technology of turbine blades and convective heat transfer, applied in the direction of cores, molds, mold components, etc., can solve the problems of no core-off equipment, high environmental isolation requirements, and high equipment requirements

Active Publication Date: 2016-09-28
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above-mentioned prior art requires high isolation of the environment in the process of removing the ceramic core of the ceramic core, and needs to impact the interior of the ceramic core through...

Method used

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  • Hollow turbine blade ceramic core removal device based on heat convection principle
  • Hollow turbine blade ceramic core removal device based on heat convection principle
  • Hollow turbine blade ceramic core removal device based on heat convection principle

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Embodiment Construction

[0030] 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.

[0031] The invention provides a device for removing the ceramic core of a metal hollow turbine blade. Under high temperature and high pressure conditions, the chemical corrosion method is used to remove the core. The chemical corrosion method uses chemical substances to react with the ceramic core to make the core Dissolution and removal, the external conditions of the chemical corrosion method are formed by the high-temperature and high-pressure environment produced by the coring kettle. The coring kettle can produce a convective effect, causing the corrosive liquid to boil, thereby speeding up the stripping speed. The device consists of two tanks, a pressure tank and a buffer tank, and the inside of the tank forms a closed system. The autoclave and buffer autoclave are filled with leaching ...

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Abstract

The invention discloses a hollow turbine blade ceramic core removal device based on the heat convection principle and belongs to the field of aircraft engine hollow turbine blade manufacturing equipment. The device comprises an autoclave assembly, a buffer still assembly and a controller. The autoclave assembly and the buffer still assembly are each internally provided with a heating device. The autoclave assembly is connected with the buffer still assembly through a convection channel. The convection channel is provided with a valve. The temperatures of the autoclave assembly and the buffer still assembly, the power of the heating devices and the on/off state of the valve are all controlled through the controller. The removal device is reasonable in structural design, easy and convenient to use and capable of effectively solving the problem that it is difficult to remove a residual ceramic core in an aluminum-based metal blade body of a hollow turbine blade; and the device can be widely applied to the field of hollow turbine blade manufacturing.

Description

technical field [0001] The invention belongs to the field of manufacturing equipment for hollow turbine blades of aero-engines, and in particular relates to a device for removing ceramic cores of hollow turbine blades based on the principle of convective heat transfer. Background technique [0002] The matrix material of the alumina-based core is fused corundum, which has the characteristics of extremely high refractoriness, excellent chemical stability, and high thermal stability. At the same time, the base ceramic core based on alumina can produce single-crystal directional blades. Single crystal directional blades can significantly improve the performance of the engine, and this inherent advantage determines that it can well guarantee the performance of the core. But everything has its two sides, and these advantages are also its disadvantages - it is difficult to remove from the core, especially for cores with complex shapes, especially those with small channel structure...

Claims

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Application Information

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IPC IPC(8): B22C9/10B22C9/22
CPCB22C9/106B22C9/22
Inventor 鲁中良万伟舰李涤尘苗恺陈义张航
Owner XI AN JIAOTONG UNIV
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