Method for detecting permeability of turbine blade

A turbine blade and penetrant detection technology, which is applied in the direction of optical testing for flaws/defects, can solve problems such as rework and poor conclusion consistency, and achieve the effects of improving detection rate, reducing rework rate, and prolonging residence time

Inactive Publication Date: 2013-03-20
AECC AVIATION POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the deficiencies in the prior art that require frequent rework and poor consistency of c

Method used

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  • Method for detecting permeability of turbine blade
  • Method for detecting permeability of turbine blade
  • Method for detecting permeability of turbine blade

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] This embodiment is a method for the penetration detection of a certain type of turbine blade, and the specific steps are as follows:

[0029] Step 1, trichlorethylene wax removal. The turbine blades were dewaxed by trichlorethylene steam using conventional methods. In the wax removal, the trichlorethylene solution must be replaced regularly; the replacement cycle is 30 days. Every time the wax is removed by trichlorethylene steam, the pollution of the solution must be checked first, and the trichlorethylene solution should be replaced at any time according to the pollution. Each wax removal time is 4 minutes.

[0030] Step 2, degreasing with water-based cleaning agent. Place the parts in Ardrox 6333A, a water-based cleaning agent with a concentration of 5% to 10%, and use ultrasonic cleaning for 1200s. The temperature of the water-based cleaning agent is 60°C to 70°C. In this embodiment, the temperature of the water-based cleaning agent is 65°C. The concentration ...

Embodiment 2

[0043] This embodiment is a method for the penetration detection of a certain type of turbine blade, and the specific steps are as follows:

[0044] Step 1, trichlorethylene wax removal. The turbine blades were dewaxed by trichlorethylene steam using conventional methods. In the wax removal, the trichlorethylene solution must be replaced regularly; the replacement cycle is 30 days. Every time the wax is removed by trichlorethylene steam, the pollution of the solution must be checked first, and the trichlorethylene solution should be replaced at any time according to the pollution. Each wax removal time is 4 minutes.

[0045] Step 2, degreasing with water-based cleaning agent. Place the parts in Ardrox 6333A, a water-based cleaning agent with a concentration of 5% to 10%, and use ultrasonic cleaning for 1200s. The temperature of the water-based cleaning agent is 60°C to 70°C. In this embodiment, the temperature of the water-based cleaning agent is 60°C. The concentration ...

Embodiment 3

[0058] This embodiment is a method for the penetration detection of a certain type of turbine blade, and the specific steps are as follows:

[0059] Step 1, trichlorethylene wax removal. The turbine blades were dewaxed by trichlorethylene steam using conventional methods. In the wax removal, the trichlorethylene solution must be replaced regularly; the replacement cycle is every 30 days. Every time the wax is removed by trichlorethylene steam, the pollution of the solution must be checked first, and the trichlorethylene solution should be replaced at any time according to the pollution. Each wax removal time is 4 minutes.

[0060] Step 2, degreasing with water-based cleaning agent. Place the parts in Ardrox 6333A, a water-based cleaning agent with a concentration of 5% to 10%, and use ultrasonic cleaning for 1200s. The temperature of the water-based cleaning agent is 60°C to 70°C. In this embodiment, the temperature of the water-based cleaning agent is 70°C. The concentr...

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Abstract

The invention discloses a method for detecting permeability of a turbine blade. Based on the original detection technology, the method utilizes a trichloro ethylene wax-removal technology so that the influence produced by a residual wax layer on permeability detection is avoided, and also utilizes a hot dipping technology so that the residual wax layer can be removed further. The method prolongs penetration time, eliminates the slowing influence produced by a low-temperature environment on a penetrating fluid flowing rate, and realizes full covering of a penetrating fluid on the surface of a blade. The method cleans up the surface of a part, has a detection background satisfying requirements and guarantees detection sensitivity. The method solves the problems of the prior art, reduces a detection reworking rate, improves a detection rate of fine defects on the surface of a blade, and provides references for determination of technological parameters of similar key part permeability detection.

Description

technical field [0001] The invention relates to the field of aeroengine turbine blades, in particular to a method for detecting penetration of turbine blades. Background technique [0002] As a key part of an aero-engine, the quality of the turbine blade is a prerequisite for the safe use of the engine. Penetration testing is an important means to ensure the quality of turbine blades. The selection of the testing process and the formulation of testing parameters are directly related to the quality of the final product of the turbine blades. When using conventional penetrant testing methods to test turbine blades, the following problems often occur: the penetrant has poor wetting effect on the blade surface, and small defects cannot be detected; it is difficult to clean the tenon of the blade, and the detection background is poor. And the immersion temperature of the permeate is 4.4-38°C; when the ambient temperature is low, the soaking temperature of the permeate is 4.4-10°...

Claims

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Application Information

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IPC IPC(8): G01N21/91
Inventor 王婵周嘉梁王晓滨
Owner AECC AVIATION POWER CO LTD
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