IMPELLER, CENTRIFUGAL COMPRESSOR, GAS TURBINE AND METHOD FOR MANUFACTURING IMPELLER

• Main Authors: MASUTANI MINORU, AOYAMA KUNIAKI
• Format: Patent
• Language: English; Japanese
• Published: 19.09.2019
• Subjects: AIR INTAKES FOR JET-PROPULSION PLANTS; BLASTING; COMBUSTION ENGINES; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS; GAS-TURBINE PLANTS; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MECHANICAL ENGINEERING; NON-POSITIVE DISPLACEMENT PUMPS; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; WEAPONS

To provide an impeller capable of reducing a manufacturing cost, and improving structural strength.SOLUTION: An impeller 81 comprises a plurality of pressure increase flow passages 8d that is partitioned by a hub 8b, a shroud 8a and a plurality of blades 8c, introduces cooling air from an axial direction of a turbine shaft 4, flows the cooling air out toward the outside in a radial direction of the turbine shaft 4, and is provided side by side in a circumferential direction of the turbine shaft 4. The pressure increase flow passage 8d has an inflow port 83 formed on an end surface in the turbine axial direction and an outflow port 84 formed on an outer peripheral surface on the outer side in the turbine radial direction, and is an open hole 82 that is linearly formed from the inflow port 83 toward the outflow port 84.SELECTED DRAWING: Figure 4 【課題】製造コストの低減を図りつつ、構造強度の向上を図ることができるインペラ等を提供する。【解決手段】ハブ８ｂ、シュラウド８ａ及び複数の羽根８ｃにより区画され、タービン軸４の軸方向から冷却空気を流入させ、タービン軸４の径方向外側へ向かって冷却空気を流出させる、タービン軸４の周方向に並べて設けられる複数の昇圧流路８ｄを備えるインペラ８１において、昇圧流路８ｄは、タービン軸方向の端面に形成される流入口８３と、タービン径方向の外側の外周面に形成される流出口８４と、を有し、流入口８３から流出口８４に向かって直線状に貫通形成される貫通孔８２である。【選択図】図４