公开(公告)号：US20220194567A1

公开(公告)日：2022-06-23

申请号：US17689511

申请日：2022-03-08

Applicant: Textron Innovations Inc.

Inventor： David Heverly ,  Frank Bradley Stamps ,  Jouyoung Jason Choi ,  Michael R. Smith ,  Thomas C. Parham

IPC: B64C27/00 ,  B64C11/00

Abstract: A vibration attenuator for a rotor of an aircraft has a first ring with an eccentric weight, a coaxial second ring with an eccentric weight, and a central ring coaxial with the first and second rings and located therebetween. A first post extends from the first ring toward the central ring and is received in a first arcuate groove formed on the central ring, whereas a second post extends from the second ring toward the central ring and is received in a second groove formed on the central ring. A motor is configured for driving the central ring in rotation about the axis relative to the motor. The grooves are equal in length, and a center of the first groove is located on an opposite side from a center of the second groove. Rotation of the central ring by the motor causes rotation of the first and second rings.

公开(公告)号：US11577826B2

公开(公告)日：2023-02-14

申请号：US17689511

申请日：2022-03-08

Applicant: Textron Innovations Inc.

Inventor： David Heverly ,  Frank Bradley Stamps ,  Jouyoung Jason Choi ,  Michael R. Smith ,  Thomas C. Parham

IPC: B64C27/00 ,  B64C11/00

Abstract: A vibration attenuator for a rotor of an aircraft has a first ring with an eccentric weight, a coaxial second ring with an eccentric weight, and a central ring coaxial with the first and second rings and located therebetween. A first post extends from the first ring toward the central ring and is received in a first arcuate groove formed on the central ring, whereas a second post extends from the second ring toward the central ring and is received in a second groove formed on the central ring. A motor is configured for driving the central ring in rotation about the axis relative to the motor. The grooves are equal in length, and a center of the first groove is located on an opposite side from a center of the second groove. Rotation of the central ring by the motor causes rotation of the first and second rings.