US 11,852,030 B2
Turbine casing comprising a low-stress connection flange, and exhaust-gas turbine having such a turbine casing
Matthias Richner, Gebenstorf (CH)
Assigned to Turbo Systems Switzerland Ltd, Baden (CH)
Appl. No. 17/627,380
Filed by Turbo Systems Switzerland Ltd, Baden (CH)
PCT Filed Jun. 22, 2020, PCT No. PCT/EP2020/067326
§ 371(c)(1), (2) Date Jan. 14, 2022,
PCT Pub. No. WO2021/008816, PCT Pub. Date Jan. 21, 2021.
Claims priority of application No. 19186327 (EP), filed on Jul. 15, 2019.
Prior Publication US 2022/0268177 A1, Aug. 25, 2022
Int. Cl. F01D 25/16 (2006.01); F01D 25/24 (2006.01)
CPC F01D 25/243 (2013.01) [F01D 25/162 (2013.01); F05D 2220/40 (2013.01); F05D 2240/14 (2013.01); F05D 2240/15 (2013.01); F05D 2260/31 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A turbine casing for an exhaust-gas turbine, the turbine casing having a connection flange for bearing-casing-side attachment to a bearing casing, wherein the connection flange defines casing-connection bores that are mutually spaced in a circumferential direction wherein the connection flange further comprises: a clamping edge including a depression bottom, the depression bottom extending in the circumferential direction over an entire circumference of the connection flange and positioned in a radially inner edge region of the clamping edge, the depression bottom defining an annular depression and material recesses, wherein the material recesses have a depth into the depression bottom greater than a depth of the annular depression, and wherein the material recesses are positioned between mutually adjacent casing-connection bores, the material recesses oriented radially inward toward a central longitudinal axis of the turbine casing and oriented radially inward from a main body of the turbine casing.