US 12,379,032 B2
Dynamic sealing in an aircraft turbine engine control valve
Emmanuel Doyen, Moissy-Cramayel (FR)
Assigned to SAFRAN AEROSYSTEMS, Plaisir (FR)
Appl. No. 18/552,584
Filed by SAFRAN AEROSYSTEMS, Plaisir (FR)
PCT Filed Mar. 23, 2022, PCT No. PCT/FR2022/050545
§ 371(c)(1), (2) Date Sep. 26, 2023,
PCT Pub. No. WO2022/208001, PCT Pub. Date Oct. 6, 2022.
Claims priority of application No. 2103239 (FR), filed on Mar. 30, 2021.
Prior Publication US 2024/0167571 A1, May 23, 2024
Int. Cl. F16K 1/226 (2006.01); F02C 9/00 (2006.01); F16K 1/22 (2006.01)
CPC F16K 1/2268 (2013.01) [F02C 9/00 (2013.01); F16K 1/224 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A control valve, comprising:
an annular body having a main axis and defining an internal passage configured to receive a flow of a fluid,
an obturator movable inside the body about an axis of rotation between a position of obstruction of the passage and a position of release of said passage,
a rod configured to rotatably support the obturator, said rod defining said axis of rotation and passing through orifices of said body,
guide devices mounted in said orifices and configured to guide the rod, and
sealing means mounted in each of said orifices around the rod and comprising:
a tubular bellow mounted around the rod, said tubular bellow being elastically deformable along the axis of rotation,
a ring mounted around the rod and the tubular bellow and housed at least partly in one of the orifices, said ring comprising a first axial end which is secured to a first axial end of the tubular bellow and which bears axially on a first annular shoulder of the body, and
a washer mounted around the rod, said washer being interposed between a second axial end of the tubular bellow and a second annular shoulder of the rod, the washer having an external diameter smaller than an internal diameter of the ring, said ring comprising a second axial end configured to bear axially on said second shoulder of the rod in order to define a stroke of axial deformation of the tubular bellow which is axially preloaded so as to maintain the washer axially against said second shoulder.