Protective device for guide vane cavity of turbine guider assembly and preparation method

Abstract

The invention provides a protective device for a guide vane cavity of a turbine guider assembly and a preparation method. A turbine guider can be prevented from being cut into the cavity in the turning and grinding process, the application range is wide, mass production in batches can be achieved, the cost is low, and repeated utilization can be achieved. The protective device comprises a protective core and a flip cover; the protective core is made of industrial silica gel, is used for filling the guide vane cavity and is in over-tight fit with the internal shape of the cavity; and the protective core is fixed in the middle of one side of the flip cover. The protective device can be suitable for protection of any open type complex cavity part, and is wide in application range.

Description

technical field [0001] The invention belongs to the technical field of turbine guider protection, and in particular relates to a protection device and a preparation method for a guide vane cavity of a turbine guider assembly. Background technique [0002] The low-pressure turbine guide is the core component of the aero-engine. The low-pressure turbine guide of the new aero-engine is for better cooling effect. The guide vane, an important part of the low-pressure turbine guide, adopts precision casting complex hollow cavity, especially after the guide tube is installed. The shape of the cavity is more complicated; the cuttings produced by the low-pressure turbine guide during turning and grinding are easy to enter the hollow cavity of the guide vane. Although the low-pressure turbine guide is a stationary part, the working conditions are very harsh. In addition to the high aerodynamic force and unstable pulsating load, it is still surrounded by high-temperature gas. The cutti...

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Problems solved by technology

[0002] The low-pressure turbine guide is the core component of the aero-engine. The low-pressure turbine guide of the new aero-engine is for better cooling effect. The guide vane, an important part of the low-pressure turbine guide, adopts precision casting complex hollow cavity, especially after the guide tube is installed. The shape of the cavity is more complicated; the cuttings produced by the low-pressure turbine guide during turning and grinding are easy to enter the hollow cavity of the guide vane. Although the low-pressure turbine guide is a stationary part, the working conditions are very harsh. In addition to the high aerodynamic force and unstable pulsating load, it is still surrounded by high-temperature gas. The cutting will block the gas film hole under the pulse load of the low-pressure guider, which will seriously affect the cooling effect of the low-pressure turbine guider and the gas flow rate. , and even under the impact of the load, fatigue cracks and fractures of the low-pressure turbine guide will occur, which will lead to failure or even scrapping of the aero-engine

[0003] In the prior art, the medium and low pressure turbine guides have corresponding protective measures in the process of turnover and transportation. The foam protection box is used to protect the low pressure turbine guides. However, no protective measures have been taken in the process of processing the low pressure turbine guides. To avoid the cuttings generated during processing from entering the low-pressure turbine guide, the impurities mixed in the turbine guide will affect the working efficiency and quality of the turbine guide, thus affecting the normal operation of the aero-engine

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