Turbine blade cooling structure adapted to integrated printing and molding and engine

Abstract

The invention discloses a turbine blade cooling structure adapted to integrated printing and molding and an engine. The turbine blade cooling structure adapted to integrated printing and molding includes a leading edge, a trailing edge, a pressure surface and a suction surface of a turbine blade; the blade is defined to be a first cooling zone, a second cooling zone and a third cooling zone in sequence from the leading edge to the trailing edge; the first cooling zone includes air film holes and a closed impingement cooling plate; the air film holes are arranged on the front edge of the firstcooling zone; the impingement cooling plate is arranged inside the first cooling zone, and the impingement cooling plate is provided with impingement cooling holes; the second cooling zone includes two sets of inclined matrix ribs and matrix rib support plates; and the third cooling zone includes seam splitting grooves. The invention adopts a cooling structure combined with three cooling zones, which not only improves the cooling effect, but also meets the requirements of integrated printing and molding.

Description

technical field [0001] The invention relates to the field of turbine blade structure design and preparation, in particular to a turbine blade cooling structure and engine adapted to integrated printing and forming. Background technique [0002] The efficiency and power of modern gas turbines have increased with increasing turbine inlet temperatures. Turbine buckets and vanes are exposed to high temperatures that exceed the melting point of metallic compounds. Therefore an internal cooling structure is required. For turbine blade cooling structures, it is important to use appropriate boundary conditions and to have a sound mechanical design to avoid excessive temperature gradients. Because excessive temperature gradients will lead to increased thermal stress and reduce component life. [0003] Internal cooling and external cooling are two important cooling methods for turbine blades. The cold air is drawn from the compressor, and the flow rate of the flow affects the turb...

AI Technical Summary

Problems solved by technology

The cold air is drawn from the compressor, and the flow rate of the flow affects the turbine in the following ways: 1. If the turbine uses too much cold air flow, the air volume at the head of the combustion chamber will decrease, and the nitrogen oxide pollution in the combustion chamber will increase under the same power

2. If the turbine uses too much cold air flow, the trailing edge of the turbine blades will be thickened, resulting in a large wake area and reducing the aerodynamic efficiency

3. The cooling air flow is not enough to cool the turbine, which will reduce the life of the components

[0009] 3D printing is formed in a layer-by-layer stacking method, which can especially reflect its processing advantages for complex structures such as holes and curved surfaces. However, the traditional turbine design, especially the internal cooling structure, is not designed for 3D printing and cannot take advantage of this processing method.

If the suspended angle of the printed structure exceeds the allowable value of the material, the surface roughness of the molded part will increase, or collapse will occur during the printing process, resulting in printing failure

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