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公开(公告)号：WO9615029A3
公开(公告)日：1996-08-08
申请号：PCT/US9513156
申请日：1995-10-18
Applicant: UNITED TECHNOLOGIES CORP
Inventor： SCHMALING DAVID N , BYRNES FRANCIS E
CPC classification number: B64C27/51 , B64C27/35 , B64C27/605
Abstract: A pitch adjustment assembly (100) for a bearingless rotor assembly (20) which includes a torque tube member (36) enveloping a flexbeam connector (22). The pitch adjustment assembly (100) includes a centering bearing (70) for centering an inboard end (38) of the torque tube member (36) relative to the flexbeam connector (22), wherein the centering bearing (70) defines a torque tube pivot point (110) about which the torque tube member (36) is rotationally displaced relative to the flexbeam connector (22), a pitch control rod (48) mechanically connecting to a pitch control arm (46) for imparting pitch control inputs to the torque tube member (36); wherein the pitch control rod and arm (46, 48) define an input pivot point (116) and, a displacement mechanism (102 or 140), in combination with the centering bearing (70), for effecting translational displacement of the geometric center (120) of the torque tube member (36) relative to the torque tube and input pivot points (110, 116). Adjustment shims (102) or a jacking arrangement (140) is used to effect the translational displacement of the torque tube member (36).
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公开(公告)号：AU679105B2
公开(公告)日：1997-06-19
申请号：AU7512294
申请日：1994-05-26
Applicant: UNITED TECHNOLOGIES CORP
Inventor： BYRNES FRANCIS E , KRAUSS TIMOTHY A , SCHMALING DAVID N
IPC: B64C27/46 , B64C27/33 , B64C27/473
Abstract: A flexbeam for a soft inplane bearingless main rotor assembly has six spanwise regions: a hub attachment region; a first tapered region; a second tapered region; a pitch region; a tapered outboard transition region; and a main rotor blade, torque tube attachment region. One described embodiment of the flexbeam is fabricated from continuous unidirectional fiberglass plies having a 0 DEG fiber orientation, unidirectional fiberglass plies of varying lengths having a 0 DEG fiber orientation, and graphite cross plies having +/-45 DEG fiber orientations. The pitch region is formed solely by the continuous fiberglass plies which define a rectangular cross section therefor. The second tapered region is formed solely by the continuous fiberglass plies and the fiberglass plies of varying lengths. The ends of the fiberglass plies terminate in a distributed arrangement in the second tapered region to define the taper thereof. The remaining regions of the flexbeam are formed by interleaved combinations of the continuous fiberglass plies, the fiberglass plies of varying length, and the graphite cross plies of varying length. Ends of the graphite cross plies terminate in a distributed arrangement in the first tapered region to partially define the taper thereof. Ends of the fiberglass plies and the graphite cross plies terminate in a distributed arrangement in the tapered outboard transition region to define the taper thereof. The distributed arrangements of ply endings cause kick loads in the flexbeam to be distributed relatively uniformly into the ply buildups.
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公开(公告)号：CA2204901A1
公开(公告)日：1996-05-23
申请号：CA2204901
申请日：1995-10-18
Applicant: UNITED TECHNOLOGIES CORP SIKOR
Inventor： SCHMALING DAVID N , BYRNES FRANCIS E
Abstract: A pitch adjustment assembly (100) for a bearingless rotor assembly (20) which includes a torque tube member (36) enveloping a flexbeam connector (22). The pitch adjustment assembly (100) includes a centering bearing (70) for centering an inboard end (38) of the torque tube member (36) relative to the flexbeam connector (22), wherein the centering bearing (70) defines a torque tube pivot point (110) about which the torque tube member (36) is rotationally displaced relative to the flexbeam connector (22), a pitch control rod (48) mechanically connecting to a pitch control arm (46) for imparting pitch control inputs to the torque tube member (36); wherein the pitch control rod and arm (46, 48) define an input pivot point (116) and, a displacement mechanism (102 or 140), in combination with the centering bearing (70), for effecting translational displacement of the geometric center (120) of the torque tube member (36) relative to the torque tube and input pivot points (110, 116). Adjustment shims (102) or a jacking arrangement (140) is used to effect the translational displacement of the torque tube member (36).
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公开(公告)号：DE69105473T2
公开(公告)日：1995-04-13
申请号：DE69105473
申请日：1991-12-12
Applicant: UNITED TECHNOLOGIES CORP
Inventor： BYRNES FRANCIS E
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公开(公告)号：AU655504B2
公开(公告)日：1994-12-22
申请号：AU2664892
申请日：1992-08-26
Applicant: UNITED TECHNOLOGIES CORP
Inventor： BYRNES FRANCIS E , CULLEN I LAWRENCE III
IPC: B64C27/48
Abstract: A composite torque tube for a bearingless main rotor (BMR) assembly that is optimally fabricated to meet torsional stiffness, fatigue strength, and buckling strength design constraints at minimal unit weight. The composite torque tube includes a strengthened inboard section for mechanically coupling the torque tube in combination with the hub structure of the BMR assembly, a strengthened outboard section for mechanically coupling the torque tube in combination with a corresponding main rotor blade, and an intermediate section that is operative to accommodate the pitch, flapwise, and/or edgewise loads acting on the BMR assembly during operation thereof. The intermediate section of the torque tube has a constant wall thickness and is formed from continuous filament windings having a predetermined fiber orientation within a broad range of about +/-18 DEG to about +/-40 DEG and/or a narrow range of about +/-26 DEG to about +/-35 DEG . The torque tube is preferably formed from continuous filament windings having an optimal fiber orientation of about +/-35 DEG to provide an intermediate section having a minimal torque tube wall thickness.
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Patent Agency Ranking
公开(公告)号：DE69103244D1
公开(公告)日：1994-09-08
申请号：DE69103244
申请日：1991-10-10
Applicant: UNITED TECHNOLOGIES CORP
Inventor： BYRNES FRANCIS E , KRAUSS ALBERT T , HIBYAN EDWARD S
IPC: B64C27/605
Abstract: The swashplate configuration eliminates the need for scissors linkages through the use of a centering member (24) capable of tilt and axial translation while driving torque to the rotating swashplate member through the use of elastomeric bearing assemblies each consisting of a first stack of flat laminates (34, 36) and a second stack of spherical laminates (38).
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公开(公告)号：CA2149673A1
公开(公告)日：1994-07-07
申请号：CA2149673
申请日：1993-10-18
Applicant: UNITED TECHNOLOGIES CORP
Inventor： CULLEN LAWRENCE I III , BYRNES FRANCIS E
Abstract: A tubular elastomer damper has a central shaft disposed within a housing and surrounded by an elastomer member. Uniform strain is provided across the elastomer disposed between the central shaft and the housing by either tapering the length of the elastomer from an inner to an outer bonding surface such that the radius times the length at each point along the elastomer is equal or by providing a first elastomer layer adjacent the shaft having a high fatigue strain/lower damping ability, a second elastomer layer adjacent the housing having a low strain higher damping ability and an intermediate elastomer layer of moderate strain and damping therebetween such that from the inner to the outer radius of the elastomer member, uniform strain is achieved. By providing uniform strain from the inner to the outer radius of the tubular elastomer damper, temperature increases due to localized high strains are avoided which are detrimental to damper performance. Optionally, axial cooling passages are provided within the elastomer member to dissipate heat to assure operation within design parameters, thus extending the life of the tubular elastomer damper.
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公开(公告)号：CA2055202C
公开(公告)日：1992-06-18
申请号：CA2055202
申请日：1991-11-08
Applicant: UNITED TECHNOLOGIES CORP
Inventor： BYRNES FRANCIS E
Abstract: A snubber set (30) for a helicopter rotor (10) is comprised of an inner race (44), an intermediate race (45), a preload plate (46), an inner portion (48) having alternating laminates of elastomer (52) and metal shims (54) which are spherically shaped, and an outer portion (50) having alternating laminates of elastomer (58) and metal shims (60) which are flat. The flat laminates (58) are comprised of a center portion (61) made from a high loss elastomer and a peripheral portion (62) made from a high shear strength elastomer.
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公开(公告)号：DK276485D0
公开(公告)日：1985-06-19
申请号：DK276485
申请日：1985-06-19
Applicant: UNITED TECHNOLOGIES CORP
Inventor： BYRNES FRANCIS E , FERRIS DONALD L , HIBYAN EDWARD S , NOEHREN WILLIAM L , OGLE PETER C , OLSEN ERIC G
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公开(公告)号：ES2115919T3
公开(公告)日：1998-07-01
申请号：ES94902181
申请日：1993-10-18
Applicant: UNITED TECHNOLOGIES CORP
Inventor： BYRNES FRANCIS E , CULLEN LAWRENCE I III
Abstract: A tubular elastomer damper has a central shaft disposed within a housing and surrounded by an elastomer member. Uniform strain is provided across the elastomer disposed between the central shaft and the housing by either tapering the length of the elastomer from an inner to an outer bonding surface such that the radius times the length at each point along the elastomer is equal or by providing a first elastomer layer adjacent the shaft having a high fatigue strain/lower damping ability, a second elastomer layer adjacent the housing having a low strain higher damping ability and an intermediate elastomer layer of moderate strain and damping therebetween such that from the inner to the outer radius of the elastomer member, uniform strain is achieved. By providing uniform strain from the inner to the outer radius of the tubular elastomer damper, temperature increases due to localized high strains are avoided which are detrimental to damper performance. Optionally, axial cooling passages are provided within the elastomer member to dissipate heat to assure operation within design parameters, thus extending the life of the tubular elastomer damper.
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