Turbine air cooling blade with cold air duct
A cold air duct and air cooling technology, which is applied in the direction of blade support components, engine components, machines/engines, etc., can solve the problems of blocking the impact hole of the cold air duct, radial serial movement of the cold air duct, and increased temperature of the blade, so as to avoid The effect of interference
Inactive Publication Date: 2021-01-08
AECC SHENYANG ENGINE RES INST
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Problems solved by technology
[0003] In the prior art, when the cold air duct is installed, the radial relative position of the impact hole on the cold air duct and the positioning rib on the inner wall of the blade cannot be guaranteed. When the cold air duct interferes with the rib on the inner wall, the impact hole at the corresponding position will be affected. The normal outflow of the cold air duct will affect the cooling effect of the inner cavity, resulting in an increase in the local temperature of the blade; when welding the fixed end of the cold air duct, it will cause radial movement of the cold air duct; the fixed end of the cold air duct is directly welded to the inner wall of the blade, There is a risk of solder flowing and blocking the cold air duct impingement hole
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[0025] In order to make the purpose, technical solution and advantages of the application more clear, the technical solution in the embodiment of the application will be described in more detail below in conjunction with the drawings in the embodiment of the application. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of the application. The embodiments described below by referring to the figures are exemplary, and are intended to explain the present application, and should not be construed as limiting the present application. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application. Embodiments of the present application will be described in detail below in conjunction with th...
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The invention belongs to the field of aero-engine blades, and particularly relates to a turbine air cooling blade with a cold air duct. The turbine air cooling blade comprises a turbine air cooling blade body and the cold air duct. A cooling channel is formed in the turbine air cooling blade body in the radial direction, positioning partition ribs are arranged on the inner wall face of the coolingchannel, and a positioning boss is arranged at the lower end of the turbine air cooling blade body. Punched holes are formed in the pipe wall of the cold air duct, an upper overturned edge is arranged at the upper end of the cold air duct, and a positioning groove is formed in the lower end of the cold air duct in the radial direction. The cold air duct is arranged in a cooling channel of the turbine air cooling blade in a sleeved mode, the upper end of the cold air duct is fixedly welded to the turbine air cooling blade through the upper overturned edge, the lower end of the cold air duct isin cooperative installation with a positioning boss of the turbine air cooling blade through the positioning groove, and the punched holes of the cold air duct is not shielded by the positioning partition ribs of the turbine air cooling blade. According to the turbine air cooling blade with the cold air duct, the problems in radial positioning of the cold air duct problem during installation canbe effectively solved, and therefore, the risk that cooling fails due to flowing welding flux which causes blockage is reduced.
Description
technical field [0001] The application belongs to the field of aeroengine blades, in particular to a turbine air-cooled blade with a cold air duct. Background technique [0002] The cold air duct is a commonly used cooling structure for the inner cavity of the turbine air-cooled blade. There are a certain number of impact holes on the cold air duct. The cold air enters the duct and flows out from the impact holes to cool the high temperature area of the blade body. The correctness of the installation of the cold air duct determines the cooling effect of the blade to a large extent. One end of the commonly used cold air duct is welded on the blade, and the other end is a free end. During the working process, the cold air duct expands and deforms outward under the action of temperature and internal and external pressure difference. In order to prevent the cold air duct from sticking to the inner wall, positioning ribs are usually arranged on the inner wall of the blade to su...
Claims
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IPC IPC(8): F01D5/18
CPCF01D5/189
Inventor 杨珂马世岩尤宏德
Owner AECC SHENYANG ENGINE RES INST