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    • 1. 发明授权
    • Torque tube/spar assembly for variable diameter helicopter rotors
    • US5636969A
    • 1997-06-10
    • US412175
    • 1995-03-28
    • David G. MatuskaEdward W. GronenthalW. Donald Jepson
    • David G. MatuskaEdward W. GronenthalW. Donald Jepson
    • B64C11/00B64C27/473B64C29/00B64C11/28
    • B64C11/003B64C29/0033
    • A torque tube/spar assembly (100) for transferring operational loads of a Variable Diameter Rotor blade assembly (16) to a rotor hub assembly (18) and includes a torque tube member (24), a spar member (30) and a bearing assembly (40a, 40b) for telescopically mounting the spar member (30) to the torque tube member (24) and furthermore defines an internal channel (62) for housing a retraction/extension mechanism (64) which mounts to an internally formed restraint surface (86) of the spar member (30) and is operative to vary the length of the rotor blade assembly (18). The torque tube member (30) has a substantially constant external geometry along the length of bearing assembly engagement and defines a root end region (102), a tip end region (106) and an intermediate transition region (104) disposed therebetween. The spar member (30) has a substantially constant internal geometry and defines a root end region (110), a first transition (112), an intermediate region (114), a second transition region (116), a restraint region (118) and a tip end region (120). Each of the various regions of the torque tube and spar members (24, 30) have a characteristic stiffness value wherein the characteristic values (104m, 106m) of the intermediate transition and tip end regions (104,106) of the torque tube member (24) are less than the characteristic stiffness value (102m) of the root end region (102) thereof, and wherein the characteristic stiffness value (118m) of the restraint region (118) of the spar member (30) is greater than said characteristic stiffness values (114m, 120m) of the intermediate and tip end regions (114, 120) thereof, and wherein the characteristic stiffness value (114m) of the intermediate region (114) is less than the characteristic stiffness values (110m, 112m, 116m, 118m) of the root end, first transition, second transition and restraint regions (110, 112, 116, 118).
    • 2. 发明授权
    • Retraction/extension mechanism for variable diameter rotors
    • 可变直径转子的伸缩机构
    • US5642982A
    • 1997-07-01
    • US570579
    • 1995-12-11
    • David G. MatuskaEdward W. Gronenthal
    • David G. MatuskaEdward W. Gronenthal
    • B64C11/00B64C29/00F04D29/18
    • B64C29/0033B64C11/003
    • A retraction/extension mechanism (70) for a Variable Diameter Rotor system (10), the Variable Diameter Rotor system (10) having a plurality of rotor blade assemblies (16) mounted to and rotating with a rotor hub assembly (18) about an axis of rotation (20), each rotor blade assembly (16) having inboard and outboard blade sections (24, 22) wherein the outboard blade section (22) telescopically mounts to the inboard blade section (24). The retraction/extension mechanism (70) includes a reeling assembly (80) disposed in combination with the outboard blade section (22) of each rotor blade assembly (16) and an epicyclic gear train (100) disposed in combination 7ith the rotor hub assembly (18) and the reeling assembly (80). The epicylic gea2 train is, furthermore, operative for driving the reeling assembly (80) so as to effect telescopic transition of the outboard blade sections (22) with respect to the inboard blade sections (24).
    • 一种用于可变直径转子系统(10)的缩回/延伸机构(70),所述可变直径转子系统(10)具有多个转子叶片组件(16),所述多个转子叶片组件(16)安装到转子轮毂组件 旋转轴线(20),每个转子叶片组件(16)具有内侧和外侧叶片部分(24,22),其中外侧叶片部分(22)可伸缩地安装到内侧叶片部分(24)。 缩回/延伸机构(70)包括与每个转子叶片组件(16)的外侧叶片部分(22)组合设置的卷取组件(80)和一个行星齿轮系(100),其组合在转子轮毂组件 (18)和卷取组件(80)。 此外,上述的epaylic gea2列可操作用于驱动卷取组件(80),以便实现外侧叶片部分(22)相对于内侧叶片部分(24)的伸缩转变。
    • 3. 发明授权
    • Rotor system having alternating length rotor blades and positioning
means therefor for reducing blade-vortex interaction (BVI) noise
    • US5620304A
    • 1997-04-15
    • US570581
    • 1995-12-11
    • David G. MatsukaEdward W. GronenthalRobert C. Moffitt
    • David G. MatsukaEdward W. GronenthalRobert C. Moffitt
    • B64C11/28
    • B64C11/28
    • A Variable Diameter Rotor (VDR) system (4) having telescoping odd and even blade assemblies (O.sub.b, E.sub.b) wherein the odd blade assemblies define a radial length R.sub.O and the even blade assemblies define a radial length R.sub.E. Each blade assembly (O.sub.b, E.sub.b) defines an internal chamber (64) for accepting a positioning mechanism (70) operative to effect telescopic translation of the blade assemblies (O.sub.b, E.sub.b) such that the radial length R.sub.E of the even blade assemblies (E.sub.b) is equal to the radial length R.sub.O of the odd blade assemblies (O.sub.b) in a first operating mode, and such that the radial length R.sub.E is between about 70% to about 95% of the length R.sub.O in a second operating mode. The positioning mechanism (70) includes a centrifugal restraint assembly (80) disposed within each internal chamber (64), a stop surface (64s) formed internally of each internal chamber (64), and an actuation mechanism (90) operative for transpositioning the centrifugal restraint assemblies (80) within the internal chambers (64) such that, in one operating mode, the centrifugal restraint assemblies (80)are disposed in abutting engagement with the stop surfaces (64s) and, in another operating mode, the actuation mechanism (90) is disposed in abutting engagement with the centrifugal restraint assemblies (80) of at least one of the blade assemblies (O.sub.b, E.sub.b). The actuation mechanism includes a reeling assembly (110) having a cylindrical drum (112) disposed internally of the rotor assembly (8), end fixities (114) disposed internally of the chambers (64) and operative for engaging and disengaging the centrifugal restraint assembly (80), straps (116) for mechanically coupling the end fixities (114) to the cylindrical drum (112), and a drive mechanism (120) for effecting rotation of the cylindrical drum (112).