Variable nozzle unit and variable geometry system turbocharger
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F01D-017/16
F02B-037/22
F01D-005/02
F01D-005/12
F01D-009/04
F01D-025/16
F02B-037/24
출원번호
US-0174186
(2016-06-06)
등록번호
US-10233828
(2019-03-19)
우선권정보
JP-2013-261988 (2013-12-19)
발명자
/ 주소
Segawa, Kenichi
Ikeya, Nobuyuki
Scheuermann, Tobias
Kotzbacher, Thorben
출원인 / 주소
IHI Corporation
대리인 / 주소
Oblon, McClelland, Maier & Neustadt, L.L.P.
인용정보
피인용 횟수 :
0인용 특허 :
4
초록▼
A base portion of the support ring includes as many joining areas as connection pins. The joining areas respectively surround pin holes through which to insert end portions of the connection pins, and are arranged in a circumferential direction of the support ring. Cuts are formed around each joinin
A base portion of the support ring includes as many joining areas as connection pins. The joining areas respectively surround pin holes through which to insert end portions of the connection pins, and are arranged in a circumferential direction of the support ring. Cuts are formed around each joining area of the support ring in order to allow deformation of an intermediate portion of the support ring relative to the joining area.
대표청구항▼
1. A variable nozzle unit configured to be placed surrounding a turbine impeller inside a turbine housing of a variable geometry system turbocharger, and capable of varying an area of a passage of an exhaust gas to be supplied to the turbine impeller, comprising: a support ring configured to be plac
1. A variable nozzle unit configured to be placed surrounding a turbine impeller inside a turbine housing of a variable geometry system turbocharger, and capable of varying an area of a passage of an exhaust gas to be supplied to the turbine impeller, comprising: a support ring configured to be placed inside the turbine housing, and including an annular base portion,a cylindrical intermediate portion integrally formed on an outer peripheral edge of the base portion to project toward one side in an axial direction of the turbine impeller, andan annular tip end edge portion integrally formed on a tip end edge of the intermediate portion to project outward in a radial direction of the support ring, and held between the turbine housing and a bearing housing of the variable geometry system turbocharger;a nozzle ring integrally provided to the base portion of the support ring by joining end portions of three or more connection pins to the base portion thereof, the connection pins arranged in a circumferential direction of the base portion;a shroud ring integrally provided to the nozzle ring by joining opposite end portions of the connection pins to the shroud ring at a position away from the nozzle ring in the axial direction, and covering tip end edges respectively of a plurality of turbine blades of the turbine impeller; anda plurality of variable nozzles placed between mutually-facing surfaces of the nozzle ring and the shroud ring in a circumferential direction of the nozzle ring or the shroud ring, and capable of turning on axes thereof in forward and reverse directions, the axes being in parallel with an axis of the turbine impeller, whereinthe base portion of the support ring includes as many joining areas as the connection pins, the joining areas respectively surround pin holes through which to insert the end portions of the connection pins, the joining areas are in contact with an opposite surface of the nozzle ring from the facing surface of the nozzle ring, and the joining areas are arranged in a circumferential direction of the support ring, anda cut is formed in each of parts of the support ring which are located behind and outward of the respective joining areas in the radial direction of the support ring, with respect to the axis of the turbine impeller. 2. The variable nozzle unit according to claim 1, wherein the cut has to be defined by its extension from the base portion to the cylindrical intermediate portion. 3. The variable nozzle unit according to claim 2, wherein the cut comprises: a first cut formed in a part of the support ring located outward of each joining area in the radial direction of the support ring to extend from the base portion to the intermediate portion, and extending in a direction of a tangent to the nozzle ring; anda second cut formed outward of each joining area in the radial direction of the support ring, and between the first cuts adjacent in the circumferential direction of the support ring, and extending from the base portion to the intermediate portion. 4. The variable nozzle unit according to claim 2, wherein the cut includes a first cut formed in a part of the intermediate portion of the support ring, or in a part of the base portion of the support ring located outward of each joining area in the radial direction of the support ring, and extending in the circumferential direction of the support ring, andtwo second cuts formed outward of each joining area in the radial direction of the support ring, and extending respectively from two ends portions of the first cut to the base portion or the intermediate portion. 5. The variable nozzle unit according to claim 1, wherein the cut is configured to be capable of allowing deformation of the intermediate portion of the support ring relative to the joining areas. 6. The variable nozzle unit according to claim 5, wherein the cut comprises: a first cut formed in a part of the support ring located outward of each joining area in the radial direction of the support ring to extend from the base portion to the intermediate portion, and extending in a direction of a tangent to the nozzle ring; anda second cut formed outward of each joining area in the radial direction of the support ring, and between the first cuts adjacent in the circumferential direction of the support ring, and extending from the base portion to the intermediate portion. 7. The variable nozzle unit according to claim 5, wherein the cut is formed in the intermediate portion of the support ring in the circumferential direction of the support ring. 8. The variable nozzle unit according to claim 5, wherein the cut includes a first cut formed in a part of the intermediate portion of the support ring, or in a part of the base portion of the support ring located outward of each joining area in the radial direction of the support ring, and extending in the circumferential direction of the support ring, andtwo second cuts formed outward of each joining area in the radial direction of the support ring, and extending respectively from two ends portions of the first cut to the base portion or the intermediate portion. 9. The variable nozzle unit according to claim 1, wherein the cut comprises: a first cut formed in a part of the support ring located outward of each joining area in the radial direction of the support ring to extend from the base portion to the intermediate portion, and extending in a direction of a tangent to the nozzle ring; anda second cut formed outward of each joining area in the radial direction of the support ring, and between the first cuts adjacent in the circumferential direction of the support ring, and extending from the base portion to the intermediate portion. 10. The variable nozzle unit according to claim 1, wherein the cut is formed in the intermediate portion of the support ring in the circumferential direction of the support ring. 11. The variable nozzle unit according to claim 1, wherein the cut includes a first cut formed in a part of the intermediate portion of the support ring, or in a part of the base portion of the support ring located outward of each joining area in the radial direction of the support ring, and extending in the circumferential direction of the support ring, andtwo second cuts formed outward of each joining area in the radial direction of the support ring, and extending respectively from two ends portions of the first cut to the base portion or the intermediate portion. 12. A variable geometry system turbocharger configured to boost air to be supplied to an engine by use of energy of an exhaust gas from the engine, comprising the variable nozzle unit according to claim 1.
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