US 11,946,377 B2
Variable nozzle device, turbine, and turbocharger
Bipin Gupta, Tokyo (JP); Toyotaka Yoshida, Tokyo (JP); Yuya Nakahara, Tokyo (JP); Yosuke Dammoto, Sagamihara (JP); and Yoji Akiyama, Sagamihara (JP)
Assigned to MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD., Kanagawa (JP)
Appl. No. 17/796,550
Filed by MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD., Sagamihara (JP)
PCT Filed Feb. 17, 2020, PCT No. PCT/JP2020/005989
§ 371(c)(1), (2) Date Jul. 29, 2022,
PCT Pub. No. WO2021/166021, PCT Pub. Date Aug. 26, 2021.
Prior Publication US 2023/0050463 A1, Feb. 16, 2023
Int. Cl. F04D 29/44 (2006.01); F01D 17/16 (2006.01)
CPC F01D 17/165 (2013.01) [F05D 2220/40 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A variable nozzle device for a variable geometry turbocharger, comprising:
a nozzle mount;
a nozzle plate disposed so as to face the nozzle mount, the nozzle plate forming a nozzle flow passage having an annular shape between the nozzle plate and the nozzle mount; and
a plurality of variable nozzle vanes disposed at a predetermined interval in a circumferential direction of the nozzle flow passage so as to be individually rotatable about a pivot axis,
wherein the nozzle plate includes a first surface facing the nozzle mount, a second surface opposite to the first surface, and at least one through hole formed through the first surface and the second surface,
wherein the at least one through hole has a first opening formed on the first surface at an inner side of the pivot axis with respect to a radial direction, and a second opening formed on the second surface at an outer side of the first opening with respect to the radial direction or at the same position as the first opening with respect to the radial direction, and
wherein the at least one through hole is formed such that the first opening of the nozzle plate has a smaller opening area than the second opening of the nozzle plate.