A method for forming an engine heat shield
A molding method and heat shield technology, applied in the direction of machines/engines, mechanical equipment, gas turbine devices, etc., can solve the problems of poor assembly controllability, poor anti-vibration effect, easy deformation strength, etc., and achieve convenient installation, light weight, The effect of high mechanical strength
Active Publication Date: 2018-04-03
BAIMTEC MATERIAL CO LTD
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Problems solved by technology
The high-pressure compressor and rear casing of aircraft engines need heat insulation for protection due to the high temperature brought by high-temperature gas. The heat shields currently used in China are ordinary ceramic heat-insulating fiber blankets wrapped in fiber cloth. The above structure exists The shortcomings of poor assembly controllability and poor anti-vibration effect, overheating occurred during the application process
[0003] Some engine heat shields are formed by argon arc welding, which is not suitable for such structures with a plate thickness of less than 0.8mm, and is easily deformed and has low strength.
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[0027] The present invention will be described in further detail below in conjunction with accompanying drawing and specific embodiment:
[0028] See attached Figure 1~4 As shown, the heat shield is ring-shaped and is spliced by three arc-shaped heat insulating parts of the same structure. The parts are made of 0.5mm high temperature resistant alloy sheet, the heat insulation material is ceramic fiber blanket, the thickness of the heat shield is 25mm, and the diameter of the inner ring is 800mm. ℃.
[0029] The sheet metal parts constituting the hexahedral structure of the heat insulation part are divided into: the upper Z-shaped sheet metal part 1 which forms the upper and lower parts of the hexahedron, and the lower Z-shaped sheet metal part 2, which forms the circular arc shape of the inner and outer parts of the hexahedron The inner sheet metal part 3 and the outer sheet metal part 4 (planar structure before welding), constitute the linear left Z-shaped sheet metal pa...
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Abstract
The invention relates to a forming method of an engine heat insulation shroud. The heat insulation shroud is annular and is formed by splicing three to six arc-shaped heat insulation pieces the same in structure. Each heat insulation piece is of a hexahedron structure and is formed by connecting sheet metal parts, and the middle of each heat insulation piece is filled with a heat insulation material. The sheet metal parts forming the hexahedron structure of each heat insulation piece comprise the arc-shaped upper Z-shaped sheet metal part (1), the arc-shaped lower Z-shaped sheet metal part (2), the arc-shaped inner sheet metal part (3), the arc-shaped outer sheet metal part (4), the linear left Z-shaped sheet metal part (5) and the linear right Z-shaped sheet metal part (6), wherein the upper part and the lower part of the hexahedron are formed by the arc-shaped upper Z-shaped sheet metal part (1) and the arc-shaped lower Z-shaped sheet metal part (2), the inner part and the outer part of the hexahedron are formed by the arc-shaped inner sheet metal part (3) and the arc-shaped outer sheet metal part (4), and the left part and the right part of the hexahedron are formed by the linear left Z-shaped sheet metal part (5) and the linear right Z-shaped sheet metal part (6). The heat insulation shroud has the beneficial effects of being convenient and fast to mount, good in heat insulation effect, resistant to vibration and the like.
Description
technical field [0001] The invention relates to a forming method of an engine heat shield, which is used for heat insulation of a gas turbine exhaust device, a high-pressure compressor of an aircraft engine and a rear casing, and belongs to the technical field of engines. Background technique [0002] The high-temperature gas generated during the working process of the gas turbine still has a high temperature when it enters the exhaust device of the engine through the power turbine. In order to ensure the normal operation of external equipment and to recycle the remaining heat as much as possible to improve the working efficiency of the gas turbine Efficiency, the exhaust device needs to be equipped with a heat shield. The high-pressure compressor and rear casing of aircraft engines need heat insulation for protection due to the high temperature brought by high-temperature gas. The heat shields currently used in China are ordinary ceramic heat-insulating fiber blankets wrapp...
Claims
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IPC IPC(8): F02C7/24B23P15/00
CPCB23P15/00F02C7/24
Inventor 任河郑付来吴娜王恒芝范召东
Owner BAIMTEC MATERIAL CO LTD