US 12,372,005 B2
Variable geometry turbine and turbocharger with same
Bipin Gupta, Tokyo (JP); Takeru Chiba, Tokyo (JP); Hiroshi Nakagawa, Sagamihara (JP); and Takashi Yoshimoto, Sagamihara (JP)
Assigned to MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD., Sagamihara (JP)
Appl. No. 18/728,180
Filed by MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD., Sagamihara (JP)
PCT Filed Jan. 18, 2022, PCT No. PCT/JP2022/001572
§ 371(c)(1), (2) Date Jul. 11, 2024,
PCT Pub. No. WO2023/139639, PCT Pub. Date Jul. 27, 2023.
Prior Publication US 2025/0092797 A1, Mar. 20, 2025
Int. Cl. F01D 17/16 (2006.01); F02B 37/24 (2006.01)
CPC F01D 17/16 (2013.01) [F01D 17/165 (2013.01); F02B 37/24 (2013.01); F05D 2220/40 (2013.01); F05D 2240/128 (2013.01); F05D 2260/60 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A variable geometry turbine comprising:
a turbine impeller;
a housing that accommodates the turbine impeller;
a plurality of nozzle vanes that are disposed in a nozzle flow path formed inside the housing; and
a link mechanism that changes a vane angle of each of the plurality of nozzle vanes by rotating each of the plurality of nozzle vanes,
wherein a link compartment that accommodates the link mechanism and that is partitioned from the nozzle flow path by a hub-side member having a hub-side surface defining the nozzle flow path is formed inside the housing,
the link mechanism and each of the plurality of nozzle vanes are connected to each other through a nozzle shaft penetrating the hub-side member,
at least one communication hole through which the nozzle flow path and the link compartment communicate with each other is formed in the hub-side member, and
an opening of the at least one communication hole on a nozzle flow path side is formed on an inner side in a radial direction of the turbine impeller with respect to a leading edge of each of the plurality of nozzle vanes in a case where each of the plurality of nozzle vanes is in a fully open state, and
wherein the opening of the at least one communication hole on the nozzle flow path side is formed on the inner side in the radial direction with respect to each of a plurality of the nozzle shafts.