US 12,065,938 B2
Variable geometry turbine
Stephen David Hughes, Huddersfield (GB)
Assigned to CUMMINS LTD, London (GB)
Appl. No. 17/802,877
Filed by Cummins Ltd., London (GB)
PCT Filed Mar. 30, 2020, PCT No. PCT/EP2020/059014
§ 371(c)(1), (2) Date Aug. 26, 2022,
PCT Pub. No. WO2021/170254, PCT Pub. Date Sep. 2, 2021.
Claims priority of application No. 2002924 (GB), filed on Feb. 28, 2020.
Prior Publication US 2023/0098102 A1, Mar. 30, 2023
Int. Cl. F01D 17/16 (2006.01); F01D 5/14 (2006.01); F01D 17/14 (2006.01)
CPC F01D 17/16 (2013.01) [F01D 5/141 (2013.01); F01D 17/14 (2013.01); F05D 2220/40 (2013.01); F05D 2240/12 (2013.01); F05D 2260/60 (2013.01); F05D 2260/81 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A variable geometry turbine comprising:
a turbine housing defining an inlet and an outlet;
a turbine wheel rotatably mounted in the turbine housing between the inlet and the outlet such that the turbine wheel can rotate about an axis;
a movable wall member mounted in the housing so as to be movable relative to the housing between at least a first position and a second position, the movable wall member partially defining an inlet passageway between the inlet and the turbine wheel, the inlet passageway being radially outboard of the turbine wheel, a dimension of the inlet passageway being dependent on a position of the movable wall member relative to the housing; and
a plurality of vanes extending across the inlet passageway, the vanes being circumferentially spaced;
wherein in cross section each of the vanes has an elongate shape extending from a leading edge which is closer to the inlet to a trailing edge which is closer to the turbine wheel and wherein the vanes have a shape defined by the thickness distribution in Table 1 and the angular distribution in Table 2.
 
2. A variable geometry turbine comprising:
a turbine housing defining an inlet and an outlet;
a turbine wheel rotatably mounted in the turbine housing between the inlet and the outlet such that the turbine wheel can rotate about an axis;
a movable wall member mounted in the housing so as to be movable relative to the housing between at least a first position and a second position, the movable wall member partially defining an inlet passageway between the inlet and the turbine wheel, the inlet passageway being radially outboard of the turbine wheel, a dimension of the inlet passageway being dependent on a position of the movable wall member relative to the housing; and
a plurality of vanes extending across the inlet passageway, the vanes being circumferentially spaced;
wherein in cross section each of the vanes has an elongate shape extending from a leading edge which is closer to the inlet to a trailing edge which is closer to the turbine wheel and wherein the vanes have a shape defined by the thickness distribution in Table 13 and the angular distribution in Table 2.
 
3. A variable geometry turbine comprising:
a turbine housing defining an inlet and an outlet;
a turbine wheel rotatably mounted in the turbine housing between the inlet and the outlet such that the turbine wheel can rotate about an axis;
a movable wall member mounted in the housing so as to be movable relative to the housing between at least a first position and a second position, the movable wall member partially defining an inlet passageway between the inlet and the turbine wheel, the inlet passageway being radially outboard of the turbine wheel, a dimension of the inlet passageway being dependent on a position of the movable wall member relative to the housing; and
a plurality of vanes extending across the inlet passageway, the vanes being circumferentially spaced;
wherein in cross section each of the vanes has an elongate shape extending from a leading edge which is closer to the inlet to a trailing edge which is closer to the turbine wheel and wherein the vanes have a shape defined by the curves in Tables 3, 4, 5 and 6 multiplied by a scale factor.