公开(公告)号：US10279900B2

公开(公告)日：2019-05-07

申请号：US15233897

申请日：2016-08-10

Applicant: Bell Helicopter Textron Inc.

Inventor： Daniel Bryan Robertson ,  Dudley Smith ,  Mark Dreier ,  Steve Ray Ivans ,  Kirk Landon Groninga

IPC: B64C27/82 ,  B64C27/06 ,  B64C11/00 ,  B64C39/00 ,  F04D17/04 ,  F04D29/36

Abstract: In some embodiments, a rotorcraft includes a fuselage, a tailboom, a drive system and a variable thrust cross-flow fan system. The cross-flow fan system includes a cross-flow fan assembly that is mechanically coupled to a drive shaft and operable to rotate with the drive shaft about a longitudinal axis. The cross-flow fan assembly includes first and second driver plates having a plurality of blades rotatably mounted therebetween. The blades are disposed radially outwardly from the longitudinal axis and have a generally circular path of travel when the cross-flow fan assembly rotates about the longitudinal axis. The blades are moveable between a plurality of pitch angle configurations. A control assembly is coupled to the blades. The control assembly is operable to change the pitch angle configuration of the blades to generate variable thrust at a substantially constant rotational speed of the cross-flow fan assembly.

公开(公告)号：US20180044009A1

公开(公告)日：2018-02-15

申请号：US15233897

申请日：2016-08-10

Applicant: Bell Helicopter Textron Inc.

Inventor： Daniel Bryan Robertson ,  Dudley Smith ,  Mark Dreier ,  Steve Ray Ivans ,  Kirk Landon Groninga

IPC: B64C27/82 ,  B64C27/06

CPC classification number: B64C27/82 ,  B64C11/006 ,  B64C27/06 ,  B64C39/008 ,  B64C2027/8245 ,  B64C2027/8254 ,  F04D17/04 ,  F04D29/362 ,  F05D2220/90

Abstract: In some embodiments, a rotorcraft includes a fuselage, a tailboom, a drive system and a variable thrust cross-flow fan system. The cross-flow fan system includes a cross-flow fan assembly that is mechanically coupled to a drive shaft and operable to rotate with the drive shaft about a longitudinal axis. The cross-flow fan assembly includes first and second driver plates having a plurality of blades rotatably mounted therebetween. The blades are disposed radially outwardly from the longitudinal axis and have a generally circular path of travel when the cross-flow fan assembly rotates about the longitudinal axis. The blades are moveable between a plurality of pitch angle configurations. A control assembly is coupled to the blades. The control assembly is operable to change the pitch angle configuration of the blades to generate variable thrust at a substantially constant rotational speed of the cross-flow fan assembly.