-
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).
-
公开(公告)号：AU7512294A
公开(公告)日：1994-12-20
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.
-
公开(公告)号：BR8802444A
公开(公告)日：1988-12-20
申请号：BR8802444
申请日：1988-05-19
Applicant: UNITED TECHNOLOGIES CORP
Inventor： SCHMALING DAVID N
Abstract: The two-step composite joint has improved strength to withstand both axial and bending loads and comprises two articles (3;6) each comprising a filler layer (15; 30) disposed between first and second composite layers (12,18;24,27). An end section (39) of the first article's first composite layer (12) is disposed external to, overlapping and bonded to an end section (42) of the second article's first composite layer (24) to form a first overlap (45). An end section (54) of the second article's second composite layer (27) is disposed internal to, overlapping and bonded to an end section (51) of the first article's second composite layer (18) to form a second overlap (57). The first overlap (45) is displaced across the thickness and along the length of the joint (9) from the second overlap (57). Loads are transferred across the joint (9) from first layer (12) to first layer (24) and from second layer (18) to second layer (27).
-
公开(公告)号：AU4127996A
公开(公告)日：1996-12-24
申请号：AU4127996
申请日：1995-06-09
Applicant: UNITED TECHNOLOGIES CORP
Inventor： SCHMALING DAVID N , BYRNES FRANCIS E
Abstract: A hybrid composite flexbeam for a soft inplane bearingless main rotor assembly has eight spanwise regions: a hub attachment region; a first tapered region; a second tapered region; an inboard transition region; a pitch region having a cruciform configuration; an outboard transition region; a tapered outboard transition region; and a main rotor blade, torque tube attachment region. The pitch region is formed from unidirectional fiberglass plies, a 50/50 admixture of unidirectional fiberglass and graphite plies, and unidirectional graphite plies, all of which extend from root to tip of the hybrid flexbeam. Unidirectional fiberglass and graphite plies of varying lengths are interleaved in the second inboard tapered region. Fiberglass and graphite cross plies of varying lengths are interleaved in the first inboard tapered region. Fiberglass and graphite cross plies and unidirectional fiberglass plies of varying length are interleaved in the outboard tapered region. The ends of the plies of varying length form distributed ply drop-off arrangements in the first and second inboard tapered regions and the outboard tapered regions. The distributed arrangement of ply endings cause kick loads in the hybrid flexbeam to be distributed across the ply buildups. Fiberglass edge caps having a U-shaped configuration may be disposed in combination with the leading and trailing edges of the hybrid flexbeam, starting at the limits of the pitch region and extending inboardly and outboardly therefrom, respectively.
-
公开(公告)号：CA1320712C
公开(公告)日：1993-07-27
申请号：CA560854
申请日：1988-03-08
Applicant: UNITED TECHNOLOGIES CORP
Inventor： SCHMALING DAVID N
Abstract: Abstract Two-Step Composite Joint A two-step composite joint that has improved strength to withstand both axial and bending loads. The joint comprises two articles each comprising a filler layer disposed between first and second composite layers, An end section of the first article's first composite layer is disposed external to, overlapping and bonded to an end section of the second article's first composite layer to form a first overlap. An end section of the second article's second composite layer is disposed internal to, overlapping and bonded to an end section of the first article's second composite layer to form a second overlap. The first overlap is displaced across the thickness and along the length of the joint from the second overlap. Loads are transferred across the joint from first layer to first layer and from second layer to second layer. -10-
-
Patent Agency Ranking
公开(公告)号：FR2570328A1
公开(公告)日：1986-03-21
申请号：FR8513876
申请日：1985-09-19
Applicant: UNITED TECHNOLOGIES CORP
Inventor： REAVELY RICHARD T , SCHMALING DAVID N
-
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.
-
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).
-
公开(公告)号：AU1607388A
公开(公告)日：1988-11-24
申请号：AU1607388
申请日：1988-05-10
Applicant: UNITED TECHNOLOGIES CORP
Inventor： SCHMALING DAVID N
Abstract: The two-step composite joint has improved strength to withstand both axial and bending loads and comprises two articles (3;6) each comprising a filler layer (15; 30) disposed between first and second composite layers (12,18;24,27). An end section (39) of the first article's first composite layer (12) is disposed external to, overlapping and bonded to an end section (42) of the second article's first composite layer (24) to form a first overlap (45). An end section (54) of the second article's second composite layer (27) is disposed internal to, overlapping and bonded to an end section (51) of the first article's second composite layer (18) to form a second overlap (57). The first overlap (45) is displaced across the thickness and along the length of the joint (9) from the second overlap (57). Loads are transferred across the joint (9) from first layer (12) to first layer (24) and from second layer (18) to second layer (27).
-
公开(公告)号：DE3531721A1
公开(公告)日：1986-03-27
申请号：DE3531721
申请日：1985-09-05
Applicant: UNITED TECHNOLOGIES CORP
Inventor： REAVELY RICHARD T , SCHMALING DAVID N
-
-
-
-
-
-
-
-
-
Search Results
25
records
(took 0.024 seconds)
