NACELLE
    23.
    发明公开
    NACELLE 审中-公开

    公开(公告)号:EP3434596A1

    公开(公告)日:2019-01-30

    申请号:EP18182767.6

    申请日:2018-07-10

    IPC分类号: B64D27/16 B64D29/00 F02K1/72

    摘要: A nacelle (250; 350; 450; 550) may comprise an inlet cowling (202; 302; 402; 502) defining an inlet of the nacelle, wherein the inlet cowling (202; 302; 402; 502) comprises an inlet cowling maximum point (207; 307; 407; 507) and an inlet cowling aft edge (210; 310; 410; 510), wherein the inlet cowling aft edge (210; 310; 410; 510) comprises an aft edge length; and a boat tail cowling (230; 330; 430; 530) disposed aft of the inlet cowling (202; 302; 402; 502), wherein the boat tail cowling (230; 330; 430; 530) comprises a boat tail cowling forward edge (224; 324; 424; 524) having a forward edge length, and wherein the boat tail cowling forward edge (224; 324; 424; 524) is disposed adjacent to the inlet cowling aft edge (210; 310; 410; 510). The forward edge length may be smaller than the aft edge length, forming a step, the step being defined by a portion of the inlet cowling aft edge (210; 310; 410; 510) that is radially outward of the boat tail cowling forward edge (224; 324; 424; 524).

    A PITCH CHANGE MECHANISM FOR A BLADED ROTOR
    25.
    发明授权
    A PITCH CHANGE MECHANISM FOR A BLADED ROTOR 有权
    叶片转子的螺距变化机理

    公开(公告)号:EP3141476B1

    公开(公告)日:2017-09-20

    申请号:EP16186480.6

    申请日:2016-08-31

    申请人: Rolls-Royce plc

    摘要: A pitch change mechanism (100:200) for a bladed rotor comprises a driving sleeve (110:210), a drive shaft (102:202), a first pitch-changing element (130:230), a second pitch-changing element (150:250), and a plurality of blade drive gears (180). The driving sleeve (110:210) has, in axial sequence, a first helical connection portion (133:233) and a second helical connection portion (153:253). The driving sleeve (110:210) is positioned concentrically with and surrounding the drive shaft (102:202). The first pitch-changing element (130:230) has a first end (132:232) drivingly engaged with the first helical connection portion (133:233), and a first ring gear portion (140:240) at a second opposite end (138:238), while the second pitch-changing element (150:250) has a first end (152:252) drivingly engaged with the second helical connection portion (153:253), and a second ring gear portion (160:260) at a second opposite end (158:258). The plurality of blade drive gears (180) are arranged in a circumferential array around a longitudinal axis of the drive shaft (102:202). The first pitch-changing element (130:230) is positioned axially adjacent to the second pitch-changing element (150:250) with the first ring gear portion (140:240) facing the second ring gear portion (160:260). Each of the first and second pitch-changing elements (130:230,150:250) is positioned concentrically over the driving sleeve (110:210), such that axial movement of the driving sleeve (110:210) causes the first helical connection portion (133:233) to rotate the first pitch-changing element (130:230) in a first rotational direction (144), and simultaneously causes the second helical connection portion (153:253) to rotate the second pitch-changing element (150:250) in an opposite second rotational direction (164), with the contra-rotation of the first and second pitch-changing elements (130:230,150:250) causing a rotation of the plurality of blade drive gears (180) positioned between and meshingly coupled to each of the first ring gear portion (140:240) and the second ring gear portion (160:260).

    摘要翻译: 用于叶片式转子的桨距变换机构(100:200)包括驱动套筒(110:210),驱动轴(102:202),第一变桨距元件(130:230),第二变桨距元件 (150:250)和多个叶片驱动齿轮(180)。 驱动套筒(110:210)沿轴向顺序具有第一螺旋连接部分(133:233)和第二螺旋连接部分(153:253)。 驱动套筒(110:210)与驱动轴(102:202)同心并围绕驱动轴(102:202)定位。 所述第一变桨距元件(130:230)具有与所述第一螺旋连接部分(133:233)驱动接合的第一端部(132:232)和位于所述第一变速部件 (138:238),而第二节距改变元件(150:250)具有与第二螺旋连接部分(153:253)驱动接合的第一端部(152:252),而第二环形齿轮部分(160: 在第二相对端(158:258)。 多个叶片驱动齿轮(180)围绕驱动轴(102:202)的纵向轴线以圆周阵列布置。 在第一环形齿轮部分(140:240)面向第二环形齿轮部分(160:260)的情况下,第一变桨距元件(130:230)与轴向邻近第二变桨距元件(150:250)定位。 第一和第二间距改变元件(130:230,150:250)中的每一个同心地定位在驱动套筒(110:210)上,使得驱动套筒(110:210)的轴向移动导致第一螺旋连接部分 使所述第一螺距变换元件(130:230)沿第一旋转方向(144)旋转,同时使所述第二螺旋连接部分(153:253)旋转所述第二螺距变换元件(150: 其中第一和第二间距改变元件(130:230,150:250)的反向旋转引起定位在所述多个叶片驱动齿轮(180)之间并且啮合地 与第一环形齿轮部分(140:240)和第二环形齿轮部分(160:260)中的每一个联接。