公开(公告)号：EP3085920A4

公开(公告)日：2017-01-04

申请号：EP13899660

申请日：2013-12-16

申请人： MITSUBISHI HEAVY IND LTD

发明人： ARAI TAKASHI ,  OTSUBO HITOMI

IPC分类号： F02B39/00 ,  B23K31/00 ,  B23K101/00 ,  B23K103/18 ,  F01D17/16 ,  F02B37/24 ,  F02C6/12

CPC分类号： F02B37/24 ,  B23K15/0053 ,  B23K15/0093 ,  B23K26/28 ,  B23K26/323 ,  B23K31/003 ,  B23K2201/001 ,  B23K2203/05 ,  B23K2203/18 ,  B23K2203/26 ,  F01D5/04 ,  F01D9/02 ,  F01D17/16 ,  F01D17/165 ,  F02B33/40 ,  F02B39/00 ,  F02C6/12 ,  F05D2220/40 ,  F05D2230/232 ,  F05D2300/177 ,  Y02T10/144

摘要： An object is to provide a structure and a method of joining a nozzle vane and a lever, and a variable geometry turbocharger, capable of reducing breakage of a welded part between a shaft portion of the nozzle vane and the lever during usage of the same by reducing generation of a hot crack in weld metal at the welded part. A joint structure includes: a nozzle vane 2 disposed in an exhaust passage for guiding exhaust gas to a turbine wheel 34 of a variable geometry turbocharger 500, and including a shaft portion 2a; and a lever 1 including a fitting surface 42a fitted with a peripheral surface 72 on one end side of the shaft portion, for transmitting torque to the shaft portion to adjust a vane angle of the nozzle vane. Weld metal 50 at a welded part 40 between the lever and the nozzle vane is formed so that a center position 64 of the weld metal is disposed inside a position 17 of the fitting surface with respect to a radial direction of the shaft portion.

公开(公告)号：EP2960463A4

公开(公告)日：2016-04-13

申请号：EP13875417

申请日：2013-02-22

申请人： MITSUBISHI HEAVY IND LTD

发明人： OTSUBO HITOMI ,  ARAI TAKASHI ,  NAKAGAWA HIROSHI ,  YAMAGUCHI HIDEKI ,  YOSHIDA MASAKAZU

IPC分类号： F02B39/00 ,  F01D5/02 ,  F01D5/04 ,  F02B39/16

CPC分类号： F01D5/027 ,  F01D5/04 ,  F01D5/048 ,  F01D5/28 ,  F05D2220/40 ,  F05D2300/174

摘要： A turbine rotor comprising: a turbine wheel 5 obtainable by precision casting of titanium aluminide, including a hub 50 extending along a rotational center of the turbine wheel, and a plurality of impellers 40 arranged along a circumferential direction around an outer circumference of the hub, and having a web-like scallop 30 formed by making a cutout between adjacent impellers among the plurality of the impellers; and a rotor shaft 7 extending along the rotational center line C-C of the turbine wheel on a back side of the hub of the turbine wheel; wherein the turbine wheel has a balance cut portion 11 arranged along the circumferential direction of the rotational turbine wheel on the back side of the hub of the turbine wheel, wherein an area of the balance correcting part arranged in the circumferential direction is placed so that a balance cut minimum diameter BCmin is larger than a maximum diameter of the rotor shaft on the wheel mounting side, and that a balance cut maximum diameter BCmax is smaller than a scallop diameter S of the turbine wheel, and that a thickness t from the back side of the turbine wheel to a surface of the hub satisfies 1.75t‰¥w, where w is a width in a radial direction of the area arranged in the circumferential direction (i.e. balance cut).

摘要翻译： 一种涡轮转子，其特征在于，包括：通过精密铸造钛酸铝而获得的涡轮机轮5，其包括沿涡轮机叶轮的旋转中心延伸的轮毂50以及围绕轮毂的外周沿圆周方向布置的多个叶轮40， 并且具有通过在多个叶轮之间的相邻叶轮之间形成切口而形成的网状扇贝30; 以及转子轴7，其沿着涡轮机叶轮的轮毂的后侧​​沿着涡轮机叶轮的旋转中心线C-C延伸; 其特征在于，所述涡轮机叶轮具有在所述涡轮机叶轮的所述轮毂的背侧沿着所述旋转涡轮机叶轮的圆周方向配置的平衡切割部11，其中，所述平衡校正部的沿圆周方向配置的区域被配置为 平衡切割最小直径BCmin大于轮安装侧的转子轴的最大直径，平衡切割最大直径BCmax小于涡轮机叶轮的扇形直径S，并且来自后侧的厚度t 涡轮机轮毂到轮毂表面的距离满足1.75t‰，其中w是沿圆周方向排列的区域的径向宽度（即平衡切削）。

公开(公告)号：EP2821617A4

公开(公告)日：2015-12-09

申请号：EP13754668

申请日：2013-02-26

申请人： MITSUBISHI HEAVY IND LTD

发明人： OTSUBO HITOMI ,  ARAI TAKASHI ,  EBISU MOTOKI

IPC分类号： C21D9/50 ,  B23K15/04 ,  B23K26/00 ,  B23P15/00 ,  C21D1/09 ,  C21D1/30 ,  C21D9/28 ,  F01D5/02

CPC分类号： F01D5/025 ,  B23K15/0006 ,  B23K15/0026 ,  B23K15/0053 ,  B23K26/702 ,  B23K2201/001 ,  C21D1/09 ,  C21D1/30 ,  C21D9/0068 ,  C21D9/50 ,  F01D5/063 ,  F05D2220/40 ,  F05D2230/234 ,  F05D2230/40 ,  F05D2240/60

摘要： To provide a turbine rotor which enables mass production with a low-cost apparatus and which capable of suppressing leaning of the rotor shaft after welding to improve the yield, while a turbine blade rotor 12 and the rotor shaft 14 are fit to each other with concave and convex portions 12a and 14a and are permitted to be rotated, laser beam L from a laser beam generating device 30 is applied to a joint face 16 along the circumferential direction to weld the welding portion. Then, laser beam L is polarized to temper a region X on the rotor shaft side containing the welding portion with laser beam L. In contrast to residual stress R 1 having a local angular distribution generated during the welding, residual stress R 2 is permitted to be generated over the entire circumference by tempering. Leaning of the rotor shaft 14 after cooling is thereby be suppressed.