GEAR MATERIAL FOR AN ENHANCED ROTORCRAFT DRIVE SYSTEM
    4.
    发明申请
    GEAR MATERIAL FOR AN ENHANCED ROTORCRAFT DRIVE SYSTEM 失效
    用于增强旋转驱动系统的齿轮材料

    公开(公告)号:US20080145690A1

    公开(公告)日:2008-06-19

    申请号:US11611173

    申请日:2006-12-15

    CPC classification number: C23C8/22 C21D9/32 C23C8/26 C23C8/34

    Abstract: A surface processing method includes the step of increasing a surface hardness of a metal having a nominal composition that includes about 0.21-0.25 wt % carbon, about 2.9-3.3 wt % chromium, about 11-12 wt % nickel, about 13-14 wt % cobalt, about 1.1-1.3 wt % molybdenum, and a balance of iron from a first hardness to a second hardness. For example, the method is used to produce a surface-hardened component that includes a core section having a first hardness between about 51 HRC and 55 HRC and a case section having a second hardness that is greater than the first hardness.

    Abstract translation: 表面处理方法包括提高具有标称组成的金属的表面硬度的步骤,其包括约0.21-0.25重量%的碳,约2.9-3.3重量%的铬,约11-12重量%的镍,约13-14重量% 约钴,约1.1-1.3重量%的钼,余量的铁由第一硬度至第二硬度。 例如,该方法用于生产表面硬化部件,其包括具有在约51HRC和55HRC之间的第一硬度的芯部分和壳体部分 具有大于第一硬度的第二硬度。

    Gear material for an enhanced rotorcraft drive system
    7.
    发明授权
    Gear material for an enhanced rotorcraft drive system 失效
    用于增强旋翼航空器驱动系统的齿轮材料

    公开(公告)号:US08758527B2

    公开(公告)日:2014-06-24

    申请号:US11611173

    申请日:2006-12-15

    CPC classification number: C23C8/22 C21D9/32 C23C8/26 C23C8/34

    Abstract: A surface processing method includes the step of increasing a surface hardness of a metal having a nominal composition that includes about 0.21-0.25 wt % carbon, about 2.9-3.3 wt % chromium, about 11-12 wt % nickel, about 13-14 wt % cobalt, about 1.1-1.3 wt % molybdenum, and a balance of iron from a first hardness to a second hardness. For example, the method is used to produce a surface-hardened component that includes a core section having a first hardness between about 51 HRC and 55 HRC and a case section having a second hardness that is greater than the first hardness.

    Abstract translation: 表面处理方法包括提高具有标称组成的金属的表面硬度的步骤,其包括约0.21-0.25重量%的碳,约2.9-3.3重量%的铬,约11-12重量%的镍,约13-14重量% 约钴,约1.1-1.3重量%的钼,余量的铁由第一硬度至第二硬度。 例如,该方法用于生产表面硬化部件,其包括具有在约51HRC和55HRC之间的第一硬度的芯部分和具有大于第一硬度的第二硬度的壳部分。

    Spacer for a helicopter main rotor shaft

    公开(公告)号:US5421656A

    公开(公告)日:1995-06-06

    申请号:US166539

    申请日:1993-12-14

    CPC classification number: F16C35/063 B64C27/12

    Abstract: A spacer (10) for a helicopter main rotor shaft (102) is mounted in combination with the main rotor shaft (102) and is operative to support the inner race (116) of the upper bearing assembly (110) of the main rotor shaft (102) and is concomitantly operative to restrain axial migration of the inner race (116). The spacer (10) comprises a body member (11) having a stepped configuration defined by an upper cylindrical segment (12) and a lower cylindrical segment (20) to accommodate the outer structural envelope of the main rotor shaft (102). The upper cylindrical segment (12) includes an upper annular collar (14), an intermediate annular collar (16), and a lower annular collar (18), and the lower cylindrical segment (20) includes an interface annular collar (22) and a bottom annular collar (24). Structural continuity between the upper and lower cylindrical segments (12, 20) is provided by the lower annular collar (18) and the interface annular collar (22 ) and a plurality of reaction spokes (30) that extend between the upper annular collar (14) and the bottom annular collar (24). The reaction spokes (30) react the bearing migration loading exerted by the inner race (116). The upper annular collar (14) includes an annular shoulder (26) that engages the inner race (116) of the upper bearing assembly (110) to support the inner race (116) and to concomitantly restrain axial migration thereof. The endface surface (24E) of the bottom annular collar (24) selectively abuttingly engages the endface of a planetary carrier (106) to support the spacer (10) in combination with the main rotor shaft (102). A plurality of flats (28) are formed on the inner surface of the bottom annular collar (24) in alignment with corresponding reaction spokes (30). The faces (28F) of the flats (28) provide the mechanical engagement between the spacer (10) and the main rotor shaft (102), and function as a pin joint to prevent bending motion of the main rotor shaft from being inducing loads into the spacer (10).

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