US 12,135,088 B2
Sealing device for a casing
Gilles Grillon, Verberie (FR); and Julien Engrand, Verberie (FR)
Assigned to Poclain Hydraulics Industrie, (FR)
Appl. No. 17/910,255
Filed by Poclain Hydraulics Industrie, Verberie (FR)
PCT Filed Feb. 22, 2021, PCT No. PCT/FR2021/050305
§ 371(c)(1), (2) Date Sep. 8, 2022,
PCT Pub. No. WO2021/181022, PCT Pub. Date Sep. 16, 2021.
Claims priority of application No. 2002323 (FR), filed on Mar. 9, 2020.
Prior Publication US 2023/0097920 A1, Mar. 30, 2023
Int. Cl. F16J 15/34 (2006.01); B62D 55/088 (2006.01)
CPC F16J 15/344 (2013.01) [B62D 55/088 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A casing for a rotating machine comprising a first casing segment, and a second casing segment movable in rotation with respect to the first casing segment along an axis of rotation, the first casing segment and the second casing segment defining an internal volume and being in contact along an interface, the interface between the first casing segment and the second casing segment being provided with a sealing element, said sealing element being positioned in a housing connected to the internal volume of the casing, and to the surrounding medium, the connection between the housing and the surrounding medium being made via a duct,
wherein one of the first casing segment and the second casing segment comprises a planer positioned at an outer end of the duct,
wherein the duct comprises ribs formed in the first casing segment and in the second casing segment so as to form baffles in said duct, and wherein the first casing segment and/or the second casing segment have bores formed in said ribs, so as to define passages between the housing and the surrounding medium,
wherein the first casing segment and the second casing segment have bores formed in the said ribs, forming respectively outer holes and inner holes, so as to define passages between the housing and the surrounding medium when said outer holes and inner holes are aligned, the duct connecting the housing to the surrounding medium comprises a first portion, a second portion and a third portion, extending successively along a radial direction with respect to the axis of rotation from the housing towards the surrounding medium, the first portion, the second portion and the third portion each extending radially with respect to the axis of rotation, and being formed such that two successive portions are not aligned radially with respect to the axis of rotation and
wherein the first portion has a first section, the second portion has a second section and the third portion of the duct has a third section, wherein said first section is larger than said second section and said second section is larger than said third section.