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Active cooling device and method for laser repairing of single crystal turbine blade

A turbine blade, active cooling technology, applied in chemical instruments and methods, single crystal growth, crystal growth and other directions, can solve problems such as difficulty in meeting single crystal blade repair requirements, affecting blade performance, and prone to cracks at grain boundaries.

Active Publication Date: 2016-06-15
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

Once the grain boundary appears, cracks are likely to appear at the grain boundary and extend along the grain boundary under high thermal stress, directly affecting the performance of the repaired blade, and it is difficult to meet the repair requirements of single crystal blades

Method used

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  • Active cooling device and method for laser repairing of single crystal turbine blade
  • Active cooling device and method for laser repairing of single crystal turbine blade
  • Active cooling device and method for laser repairing of single crystal turbine blade

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Embodiment Construction

[0026] The specific embodiments of the present invention are given below in conjunction with the accompanying drawings, but the present invention is not limited to the following embodiments. Advantages and features of the present invention will be apparent from the following description and claims. It should be noted that all the drawings are in very simplified form and use imprecise ratios, which are only used for the purpose of conveniently and clearly assisting in describing the embodiments of the present invention.

[0027] Please refer to figure 1 , figure 1 Shown is a schematic structural diagram of an active cooling device for laser repairing single crystal turbine blades according to a preferred embodiment of the present invention. The present invention proposes an active cooling device for laser repairing single crystal turbine blades, comprising: an air compressor, a heat exchanger and an annular cooling device, wherein the air compressor compresses the gas to be c...

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Abstract

The invention provides an active cooling device and method for laser repairing of a single crystal turbine blade. The device comprises an air compressor, a heat exchanger and an annular cooling device. The air compressor compresses air to be cooled into high-speed and high-pressure airflow, and the airflow is introduced into the heat exchanger. After the introduced airflow is cooled by the heat exchanger, the airflow is introduced into the annular cooling device. The annular cooling device is arranged above a workbench of a laser cladding system and arranged around a workpiece. According to the active cooling device and method for laser repairing of the single crystal turbine blade, the volume and temperature of the cooled airflow and the position and angle of a cooling nozzle are adjusted, so that the best active cooling effect is achieved in the laser repairing process.

Description

technical field [0001] The invention relates to the fields of laser repair and material microstructure growth control, and particularly relates to an active cooling device and cooling method for repairing single crystal turbine blades. Background technique [0002] Aeroengines play an important role in the modern aviation industry. The performance index of the aero-engine directly determines the flight performance of the aircraft. In recent decades, the development of aero-engines is closely related to the development of aeronautical materials, especially high-temperature-resistant materials. At present, nickel-based single crystal alloys have been widely used as materials for high-temperature turbine blades of aero-engines. Nickel-based single crystal superalloys have increased the operating temperature of aero-engines from the initial 850°C to more than 1600°C due to their excellent high-temperature creep resistance and fatigue resistance. Single crystal turbine blades ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10C30B11/00
CPCC23C24/10C30B11/003
Inventor 刘朝阳顾剑锋
Owner SHANGHAI JIAO TONG UNIV
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