A device and method for preparing a foreign object damage gap of a blade leading edge simulation part

A technology for the leading edge of a blade and a preparation device, which is applied in the field of aero-engines, can solve problems such as reducing the dispersion of results, and achieve the effects of reducing the dispersion, a reliable preparation method, and an increase in strength

Active Publication Date: 2022-03-15
BEIHANG UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a preparation device and method for simulating the damage gap caused by foreign objects at the leading edge of the blade, solve the problem of simulating the gap caused by foreign object damage in the engine, overcome the difficulty of loading, and reduce the dispersion of results , able to perform notch preparation experiments on various materials

Method used

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  • A device and method for preparing a foreign object damage gap of a blade leading edge simulation part
  • A device and method for preparing a foreign object damage gap of a blade leading edge simulation part
  • A device and method for preparing a foreign object damage gap of a blade leading edge simulation part

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Embodiment Construction

[0052] The invention will be described in more detail below in conjunction with the accompanying drawings.

[0053]As shown in the figure, the main problem to be solved by the present invention is the problem of notch preparation.

[0054] In the actual preparation process, the structure of the whole set of instruments is as follows: Figure 1-9 As shown, it consists of four main components: a positioning fixture 1, a cylindrical seat 2, a pressure head 3, and a pressure plate 4.

[0055] When preparing the foreign object damage gap of the blade leading edge simulation part, first use bolts to fix the positioning fixture 1 on a firm test bench, and then snap the test piece into the designed groove of the positioning fixture 1 to ensure the stability of the test piece, and then The positioning fixture 1 is fixed to the cylindrical seat 2 by using two relatively downward slots of the cylindrical seat to ensure its stability, and then put the indenter 3 into the two upward slots...

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Abstract

The invention relates to a device and method for preparing a foreign object damage gap of a blade leading edge simulation part. The device is composed of four major parts: a positioning fixture, a cylindrical seat, a pressure head, and a pressure plate: the cylindrical seat is fixed on the test bench; the positioning fixture uses bolts Fixed on the test bench; the test piece is placed in the positioning fixture, and the positioning fixture is fixed to the cylindrical seat by two relatively downward slots of the cylindrical seat; the bosses at both ends of the positioning fixture limit the movement of the cylindrical seat along the groove direction of the slot; The indenter is located in the other two opposite and upward slots of the cylindrical seat, and is in contact with the position where the notch needs to be prepared on the top of the test piece; the pressure plate is located on the top, and the notch is produced by the impact of the heavy object falling.

Description

technical field [0001] The invention belongs to the technical field of aero-engines, and in particular relates to a preparation device and method for a foreign object damage gap of a blade leading edge simulation part. Background technique [0002] Aero-engines are known as the "Pearl in the Crown" in industrial manufacturing. During the working process of the compressor blades in the aero-engines, the impact of foreign objects such as sand and stones causes gaps in the leading edge of the blades. Under the action of airflow excitation and centrifugal load , will significantly reduce the fatigue resistance of the blade. It is mentioned in the aero-engine design specifications GJB241-87 and GJB242-87 that the damage caused by small particles with high hardness is called foreign object damage (Foreign Object Damage, FOD for short), and the blades of the engine need to reach a certain High cycle fatigue life. Therefore, it is necessary to carry out the research on the fatigue...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/303G01N3/04
CPCG01N3/303G01N3/04G01N2203/001G01N2203/0298G01N2203/04
Inventor 毛建兴郭小军刘建新鄢林胡殿印徐畅
Owner BEIHANG UNIV
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