TURBOCHARGER AND TURBINE WHEEL

A turbine wheel (100) for a turbocharger includes a hub (110) and blades (120). The hub includes a primary outer surface (116), a back wall surface (115), a peripheral edge (119) extending between theprimary outer surface and the back wall surface, and a central axis (111). The hub has a back wall thickness measured parallel to the central axis from the primary outer surface to the back wall surface. The blades (120) extend from the primary outer surface of the hub and are integrally formed with the hub by casting. Each blade has a blade thickness measured tangential to the central axis between opposed surfaces of the blade. A maximum diameter of the peripheral edge is 60 mm or more. Over a majority of a radially outer region (117), a thickness ratio of the blade thickness to the back wall thickness varies by 25% or less. The radially outer region extends from the peripheral edge to a 25% meridional. 一种用于涡轮增压器的涡轮机叶轮(100)包括轮毂(110)和叶片(120)。轮毂包括主外表面(116)、后壁表面(115)、在主外表面和后壁表面之间延伸的外周边缘(119)以及中心轴线(111)。轮毂具有平行于从主外表面