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Method for avoiding flexure deformation of radial diffuser center plate of aeroengine

A radial diffuser and aero-engine technology, applied in the direction of welding medium, furnace type, furnace, etc., can solve the problems of deflection and deformation of the radial diffuser web of the aero-engine, and achieve brazing quality improvement and easy processing , Solve the effect of excessive deflection deformation

Inactive Publication Date: 2011-09-07
BEIHANG UNIV
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AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for avoiding the deflection and deformation of the radial diffuser web of an aero-engine, so as to solve the problem of sealing grate teeth and shafts or Centrifugal impeller friction failure

Method used

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Embodiment Construction

[0008] The technical solution of the present invention will be further described below.

[0009] The invention discloses a method for avoiding the deflection and deformation of the web plate of the radial diffuser of the aero-engine. The improvement lies in the adoption of new materials with better comprehensive performance, the improvement of brazing quality, and the adoption of a new heat treatment process.

[0010] The details are as follows: 1. Replace the No. 20 steel plate used in the original diffuser panel with 1Cr13 plate with better comprehensive performance. No. 20 steel tensile strength σ b 410MPa, 1Cr13 tensile strength σ b is 540MPa and the yield strength σ 0.2 is 345 MPa. The overall performance of 1Cr13 is better than that of No. 20 steel, and the machining performance of 1Cr13 is equivalent to that of No. 20 steel. At 20-300°C, the linear expansion coefficient of No. 20 steel is 13.08×10 -6 / °C, while the linear expansion coefficient of 1Cr13 is 11.5×10 ...

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Abstract

The invention relates to a method for avoiding the flexure deformation of a radial diffuser center plate of an aeroengine, which comprises the steps: firstly, No.20 steel plates which are originally used in the diffuser center plate are replaced by 1Cr13 plates; meanwhile, brazing quality is improved, and brazing is carried out by high-temperature copper brazing with a brazing temperature of 1050 DEG C; after the brazing is finished, an X-ray is used to test brazing joints so as to ensure that brazing filler metal evenly and fully flows into the brazing joints; after the copper brazing is finished, radial diffuser parts are protected on a tray, and are heated to 930 to 950 DEG C so as to be subjected to oil quenching; and after the oil quenching process is finished, the radial diffuser parts are processed by high temperature tempering, and the tempering temperature is 650 to 670 DEG C.

Description

technical field [0001] The invention relates to a method for avoiding the deflection and deformation of the web plate of the radial diffuser of the aero-engine, in particular to the improved design of the components of the radial diffuser of the aero-engine. The invention belongs to the technical field of aero-engine structure design. Background technique [0002] In the prior art, the main defect of the original radial diffuser of the turbojet eleven aero-engine is the deformation of the web. When the engine is working, the radial diffuser is affected by aerodynamic load and thermal load, so that the axial distance from the radial diffuser web to the end face of the front cover becomes smaller and uneven. If the deflection value is too large, the sealing grate will rub against the shaft or the centrifugal impeller, causing engine failure. [0003] The friction between the sealing grate teeth and the shaft or the centrifugal impeller is due to the excessive deflection of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K1/00B23K35/30C21D1/18C21D9/00
Inventor 潘宁民吴一黄陈明明俞裕民桑万章王景惠
Owner BEIHANG UNIV
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