公开(公告)号：US12130199B2

公开(公告)日：2024-10-29

申请号：US17369470

申请日：2021-07-07

Applicant: Bell Textron Inc.

Inventor： Brian E. Tucker ,  Bryan Kenneth Baskin

IPC: G01M13/04 ,  B64C13/50 ,  B64C27/605

CPC classification number: G01M13/04 ,  B64C27/605 ,  B64C13/503

Abstract: Embodiments are directed to systems and methods for estimating wear in aircraft rotor systems. Data associated with loads and motions of a swashplate actuator is collected. The swashplate actuator drives a swashplate and at least one control link is coupled to the swashplate. The loads and motions of the at least one control link is estimated based upon the loads and motions of the swashplate actuator. Using a wear model, the current wear of control link components is estimated due to the loads and motions of the at least one control link. Wear estimates for the components are aggregated across multiple flights and used to determine when maintenance actions should occur.

公开(公告)号：US20240343389A1

公开(公告)日：2024-10-17

申请号：US18753030

申请日：2024-06-25

Applicant: Eagle Technologies, LLC

Inventor： John P. Benner ,  Michael D. Bartley ,  Cary A. Kravets ,  Bruce E. Bailey

IPC: B64C27/605 ,  B64C27/10 ,  B64C27/80

CPC classification number: B64C27/605 ,  B64C27/10 ,  B64C27/80

Abstract: A coaxial rotor system includes a plurality of upper rotor blades and a plurality of lower rotor blades disposed at a mast assembly. The upper rotor blades rotate about an axis of rotation in a first direction and the lower rotor blades rotate about the axis of rotation in a second direction opposite the first direction. A control system disposed at the mast assembly between the upper and lower rotor blades includes an upper swashplate connected to the upper rotor blades and a lower swashplate connected to the lower rotor blades. The control system adjusts the upper swashplate and the lower swashplate relative to the mast assembly to adjust respective pitches of the upper and lower rotor blades relative to the axis of rotation. The control system is operable to adjust the upper swashplate and the lower swashplate relative to the mast assembly independently of one another.

公开(公告)号：US20240326983A1

公开(公告)日：2024-10-03

申请号：US18129424

申请日：2023-03-31

Applicant: BETA AIR, LLC

Inventor： Kyle Brookes

IPC: B64C11/44 ,  B64C27/605 ,  B64D27/24

CPC classification number: B64C11/44 ,  B64C27/605 ,  B64D27/24

Abstract: A propulsor assembly of an electric aircraft is described. The propulsor assembly includes an electric motor, where the electric motor includes a stator and a rotor. The assembly further includes a propulsor mechanically connected to the rotor of the electric motor. The assembly also includes a cyclic control assembly including an electric actuator and a push rod, wherein the push rod is mechanically connected to the actuator and the propulsor, the push rod is configured to increase a blade angle of the propulsor when the push rod is displaced in a first direction, and the push rod is configured to decrease the blade angle of the propulsor when the push rod is displaced in a second direction.

公开(公告)号：US11912403B2

公开(公告)日：2024-02-27

申请号：US17306610

申请日：2021-05-03

Applicant: Bell Textron Inc.

Inventor： Kevin Knott ,  Vitthal Vishnuthreeth Arakeri

IPC: B64C27/605 ,  F01D7/00

CPC classification number: B64C27/605 ,  F01D7/00 ,  F05D2220/90

Abstract: An exemplary pitch link centering tool includes a rod having a longitudinal axis, a front face, a rear face, a first rod end and a second rod end, the first rod end having a first aperture with a first rotational axis, the second rod end having a second aperture with a second rotational axis, a first connector coupled to the first rod end, the first connector having a first slot extending in a first radial direction relative to the longitudinal axis and a second connector coupled to the second rod end, the second connector having a second slot extending in a second radial direction relative to the longitudinal axis different from the first radial direction.

公开(公告)号：US11858621B2

公开(公告)日：2024-01-02

申请号：US17582853

申请日：2022-01-24

Applicant: Lockheed Martin Corporation

Inventor： William A. Welsh ,  Jason A. Satira

IPC: B63H5/08 ,  B64C27/605 ,  B64C27/64 ,  F16H1/32 ,  B64C27/12 ,  B64D45/00

CPC classification number: B64C27/605 ,  B64C27/12 ,  B64C27/64 ,  F16H1/32 ,  B64D2045/0085 ,  F16H2001/323

Abstract: A rotary blade aircraft includes an airframe, a rotor shaft driven about a rotor axis, and a plurality of rotor blades driven by the rotor shaft about the rotor axis. The rotary blade aircraft includes a swashplate assembly coupled to the plurality of rotor blades. The swashplate assembly is operable to move the plurality of rotor blades about a respective longitudinal axis. The rotary blade aircraft includes a hydraulic control servo coupled between the airframe and the swashplate assembly. The hydraulic control servo is operable to move the swashplate assembly relative to the rotor axis. The rotary blade aircraft includes a harmonic control actuator coupled between the airframe and the swashplate assembly. The harmonic control actuator is operable independently relative to the hydraulic control servo to move the swashplate assembly relative to the rotor axis to reduce vibration at selected frequencies in the airframe.

公开(公告)号：US20230406491A1

公开(公告)日：2023-12-21

申请号：US18205084

申请日：2023-06-02

Applicant: Microtecnica S.r.l.

Inventor： Andrea MORNACCHI ,  Enrico QUAGLIA

IPC: B64C27/78 ,  B64D45/00 ,  B64C27/00 ,  B64C27/605

CPC classification number: B64C27/78 ,  B64D45/00 ,  B64C27/006 ,  B64C27/605 ,  B64D2045/0085

Abstract: An assembly for monitoring torque applied to a control rod of an actuator, the control rod mounted within and rotational relative to a housing, the assembly comprising a torsional spring located between the control rod and the housing, and one or more sensors for monitoring angular displacement of the control rod relative to the housing as consequence of torque applied to the control rod transmitted through the torsional spring.

公开(公告)号：US11780574B2

公开(公告)日：2023-10-10

申请号：US17337719

申请日：2021-06-03

Applicant: LOCKHEED MARTIN CORPORATION

Inventor： Yair Preiss ,  Bradley M. Bauer

IPC: B64C27/605 ,  B64C27/10

CPC classification number: B64C27/605 ,  B64C27/10

Abstract: A rotatable swashplate is rotatable relative to a stationary swashplate around a shaft and connects to a pitch control rod assembly. The rotatable swashplate includes an upper portion and a lower portion. The upper portion is extendable outside of a stationary swashplate and includes a plurality of lugs each configured to attach to a pitch control rod assembly, an innermost wall configured to receive a shaft, and a membrane. The lower portion is positionable within the stationary swashplate and has an outermost wall and at least one extension extending radially between the outermost wall and the innermost wall. The membrane extends radially over the at least one extension.

公开(公告)号：US11738864B2

公开(公告)日：2023-08-29

申请号：US17065563

申请日：2020-10-08

Applicant: Greg Chando ,  Zachary Stein

Inventor： Greg Chando ,  Zachary Stein

IPC: B64C29/00 ,  B64C39/02 ,  B64D27/24 ,  B64C27/605 ,  B64U10/20 ,  B64C27/52 ,  B64C27/28 ,  B64U30/297 ,  B64U30/10 ,  B64U30/20 ,  B64U50/19

CPC classification number: B64C39/024 ,  B64C27/28 ,  B64C27/52 ,  B64C27/605 ,  B64C29/0033 ,  B64D27/24 ,  B64U10/20 ,  B64U30/297 ,  B64U30/10 ,  B64U30/20 ,  B64U50/19

Abstract: An apparatus providing continuous tilt and variable pitch for rotors on a fixed wing VTOL aircraft. An actuator on a housing rotates a first pivot point on a motor mount to tilt a motor to horizontal and vertical positions. Simultaneously, an actuator on the motor mount rotates a fork on a second pivot point on the motor mount to adjust the pitch of the rotors attached to a free end of the motor's drive shaft. A lower swash plate on the drive shaft is attached to the fork. An upper swash plate on the drive shaft is attached to the rotors. The swash plates are attached to each other with a shaft bushing attached to a shaft ball bearing. The shaft bushing allows both swash plates to move linearly along the shaft when the fork is rotated. The shaft ball bearing allows the upper swash plate to rotate with the drive shaft while the lower swash plate remains stationary.

公开(公告)号：US11702195B2

公开(公告)日：2023-07-18

申请号：US17385607

申请日：2021-07-26

Applicant: AIRBUS HELICOPTERS TECHNIK GMBH

Inventor： Andre Hausberg ,  Steffen Hartmann

IPC: B64C27/00 ,  B64C27/605 ,  B64C27/46 ,  B64C27/72

CPC classification number: B64C27/001 ,  B64C27/46 ,  B64C27/605 ,  B64C2027/004 ,  B64C2027/7216 ,  Y02T50/30

Abstract: In one aspect, the present disclosure provides a system for reducing vibrations or stresses in a rotor blade system. The system may include at least three rotor blades configured to be rotated about a main rotor axis, where each of the three rotor blades may be adjusted by at least one electrically-adjustable control rod of a plurality of control rods. The plurality of control rods may include a first number of control rods forming a first group, and the plurality of control rods may include a second number of control rods forming a second group. A first circuit for may activate or deactivate the first group of control rods, and a second circuit may activate or deactivate the second group of control rods.

公开(公告)号：US20180327086A1

公开(公告)日：2018-11-15

申请号：US15594588

申请日：2017-05-13

Applicant: Bell Helicopter Textron Inc.

Inventor： Jaret F. Burgess ,  Frank Bradley Stamps

IPC: B64C27/32 ,  B64C27/605 ,  B64C29/00 ,  B64C27/06 ,  F16C19/06

CPC classification number: B64C27/32 ,  B64C27/06 ,  B64C27/605 ,  B64C29/0033 ,  F16C19/06 ,  F16C2326/43

Abstract: An aircraft rotor assembly has a yoke with at least two arms extending therefrom. The yoke is attached to a mast through a constant-velocity joint, thereby permitting axial tilt of the yoke relative to the mast. Each arm of the yoke includes an axisymmetric elastomeric bearing with a spherical central member and two opposite partially-spherical members attached to the central member. Each axisymmetric bearing cooperates with a cup and a bracket. Each cup is attached to one of the yoke arms and each bracket is attached to a blade cuff.