Method for enhancing structural strength of aero-engine heat shield support

Abstract

The invention belongs to the field of mechanical structural strength enhancement, and particularly relates to a structural strength enhancement method of an aero-engine heat shield support. According to the technical scheme, the structural strength enhancing method for the aero-engine heat shield support is characterized in that a reinforcing piece is arranged in the heat shield support, bent edges are arranged at the two ends of the reinforcing piece, and the two bent edges are attached to the inner walls of the two sides of the heat shield support in shape; the bent edge and the inner wall of the heat shield support are welded together in a spot welding mode, and vacuum heat treatment is carried out after welding so as to remove stress. According to the structural strength enhancing method for the aero-engine heat shield support, the heat shield support can be locally enhanced, so that the overall strength of the heat shield support is improved, and reliable work of the heat shield support is ensured.

Description

Technical Field

[0001] The invention belongs to the field of mechanical structure strength enhancement, and in particular relates to a method for enhancing the structural strength of an aero-engine heat shield bracket. Background Art

[0002] The aircraft engine heat shield bracket is a key component of the diffuser and afterburner. It is riveted to the heat shield and then secured to the outer walls of the diffuser and afterburner using bolts and self-locking nuts, forming a cooling channel. Heat shield brackets are typically constructed from a nickel-based high-temperature alloy strengthened with tungsten and molybdenum solid solution. This alloy exhibits excellent plasticity, high creep strength, and excellent oxidation resistance, as well as stamping and welding properties.

[0003] The principle of aircraft engine component design is mutual coordination and support. The heat shield bracket of an aircraft engine is located at the rear end of the front end of the afterburner cylinder unit. Under high engine temperatures, the thermal expansion of various components varies. The heat shield is a large, thin-walled sheet metal part, and its outer wall is a relatively thick forging. Under full engine afterburner, the heat shield's thermal expansion is much greater than the outer wall, causing the heat shield to expand outward, squeezing and expanding the heat shield bracket. Therefore, the heat shield bracket must have both sufficient strength and flexibility to ensure the normal release of the heat shield's thermal expansion under high temperatures.

[0004] The heat shield bracket needs to withstand thermal load and aerodynamic load during operation. At the same time, due to the large circumferential expansion of the heat shield during operation, the bracket stress load is large, which is prone to cracks, breakage and other problems, increasing the maintenance cost of engine parts. Summary of the Invention

[0005] The present invention provides a method for enhancing the structural strength of an aircraft engine heat shield bracket, which can locally strengthen the heat shield bracket to improve the overall strength of the heat shield bracket and ensure that the heat shield bracket works reliably.

[0006] The technical solutions of the present invention are as follows:

[0007] A method for enhancing the structural strength of an aircraft engine heat shield bracket comprises: disposing a reinforcement sheet inside the heat shield bracket; providing bent edges at both ends of the reinforcement sheet; and the two bent edges conform to the shape of the inner walls of the heat shield bracket. The bent edges are spot-welded to the inner wall of the heat shield bracket, and vacuum heat treatment is performed after welding to remove stress.

[0008] Furthermore, in the method for enhancing the structural strength of the aircraft engine heat shield bracket, the thickness of the reinforcement sheet is 1.0 mm.

[0009] Furthermore, in the method for enhancing the structural strength of the aircraft engine heat shield bracket, the vacuum heat treatment process is performed along with the mold to control the deformation amount.

[0010] The beneficial effects of the present invention are as follows: the present invention can locally strengthen the heat insulation screen bracket to improve the overall strength of the heat insulation screen bracket and ensure that the heat insulation screen bracket works reliably. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 Schematic diagram of the reinforcement plate installed inside the heat insulation screen bracket. DETAILED DESCRIPTION

[0012] like Figure 1 As shown, a method for enhancing the structural strength of an aircraft engine heat shield bracket is provided. A reinforcing sheet 2 is provided inside the heat shield bracket 1. The reinforcing sheet 2 has a thickness of 1.0 mm and is provided with bent edges 3 at both ends of the reinforcing sheet 2. The two bent edges 3 conform to the shape of the inner walls on both sides of the heat shield bracket 1. The bent edges 3 are spot welded to the inner wall of the heat shield bracket 1. After welding, vacuum heat treatment is performed to remove stress. The vacuum heat treatment process is carried out along with the mold to control the amount of deformation.

Claims

1. A method for enhancing the structural strength of an aircraft engine heat shield bracket, characterized in that: A reinforcing sheet is provided inside the heat insulation screen bracket. Bent edges are provided at both ends of the reinforcing sheet. The two bent edges fit the shape of the inner walls on both sides of the heat insulation screen bracket. The bent edges and the inner walls of the heat insulation screen bracket are spot welded together. After welding, vacuum heat treatment is performed to remove stress.

2. The method for enhancing the structural strength of an aircraft engine heat shield bracket according to claim 1, characterized in that: The thickness of the reinforcement sheet is 1.0 mm.

3. The method for enhancing the structural strength of an aircraft engine heat shield bracket according to claim 1, characterized in that: The vacuum heat treatment process is carried out along with the mold to control the amount of deformation.

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