Detection tool for damage condition of main blade of power diffuser and detection method

Abstract

The invention discloses a detection tool for the damage condition of a main blade of a power diffuser and a detection method. The detection tool is provided with an arc-shaped rod, and the diameter ofthe inner circular arc surface of the arc-shaped rod is equal to the diameter of the circumference at which the outermost end of the main blade is located. A measuring rod and a clamping block are fixedly arranged on the inner circular arc surface, a first range pole extending forwards is arranged on the end surface, away from the arc-shaped rod, of the measuring rod, and a second range pole extending forwards is arranged on the front end surface of the first range pole. The total length after the measuring rod, the first range pole and the second range pole are added together is equal to thelength of the main blade, and the spacing between the clamping block and the measuring rod corresponds to the thickness of the outer end of the main blade. During detection, the inner circular arc surface of the arc-shaped rod abuts against the outer end of the main blade, the measuring rod is attached to the main blade, the outer end of the main blade is located between the clamping block and the measuring rod, and the detection tool is limited to the main blade through the clamping block. The wind erosion situation at the front end of the main blade can be accurately and quickly judged by the relationship between the main blade and the measuring rod, the first range pole as well as the second range pole.

Description

Technical field [0001] The invention relates to the technical field of aircraft maintenance, in particular to a detection tool for damage of the main blade of a power diffuser of an aviation auxiliary power unit (APU) and a detection method using the detection tool for detection. Background technique [0002] The main function of the auxiliary power unit (Auxiliary power unit) is to provide power and gas for the aircraft on the ground and in the air. Boeing 737 series or Airbus A320 series aircraft are equipped with 131-9 auxiliary power units. These two types of aircraft are the two largest models in the global fleet at this stage, so there will be a large number of 131-9 series every year The auxiliary power unit must be sent to the repair shop for refurbishment. [0003] During the refurbishment process, we found that the power section diffuser (part number: 3827325-3) of the auxiliary power unit has a very high failure rate, and it is necessary to frequently check the main bla...

AI Technical Summary

Problems solved by technology

In the above-mentioned structure, the space between two adjacent blades is narrow, and conventional measuring tools cannot be inserted, so it is impossible to detect, and it is also difficult to judge the size of the wind-eroded blade with the naked eye, and it is also difficult to choose the correct repair method Repairing wind-eroded blades

For the detection of the blades of the dynamic diffuser, the manufacturer does not provide special measurement tools, which brings huge troubles to the detection work

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