An air cannon test device and test method for accurately hitting the inner position of a narrow space

A test method and technology in a narrow space, which is applied in the testing of mechanical components, testing of machine/structural components, measuring devices, etc., can solve problems such as inaccurate hitting positions, affecting impact effects, and distant muzzle damage locations. To achieve the effect of accurate strike
CN110207961BActive Publication Date: 2020-08-21NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Publication Date
2020-08-21

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Abstract

The invention discloses an air cannon test device and test method for accurately striking the inner position of a narrow space. The device comprises an air cannon barrel and a bullet support positioned in the air cannon barrel, wherein the air cannon barrel comprises an elongated insertion tube, the front end of the insertion tube is provided with a bullet support emission outlet, the insertion tube is of an elongated shape, on the premise of not influencing the flying speed of a projectile, a muzzle is inserted into a narrow space, and the accurate striking of the whole blade disc blade in anarrow space is realized. The bullet support adopts a nylon material in order to reduce the quality of the bullet support, so that the damage and influence of the bullet support on the blade are reduced. The air cannon test device can improve the test precision of the tested blade in a narrow space.
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Description

technical field

[0001] The invention relates to the technical field of air cannons. Background technique

[0002] When the aero-engine is working, it will inevitably inhale foreign small hard objects, causing damage to the fan or compressor blades. This phenomenon is called foreign object damage (FOD). The fatigue strength of the damaged blades decreases significantly, which may cause Serious aviation accident. In order to study the influence of foreign object damage on the fatigue strength of blades, in recent years, many scholars at home and abroad have carried out laboratory simulation of foreign object damage. The most widely used method at this stage is to use air cannons to fire hard objects to simulate aeroengine Impact damage from foreign objects on the blade. Since the size of the air cannon bore is fixed, in order to simulate the foreign object damage caused by hard objects of different shapes and sizes, the air cannon test system uses a bullet holder to carry ha...

Claims

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