Nozzle drive mechanism, turbocharger, and variable-capacity turbocharger

• US 10,641,125 B2
• Filed: 08/17/2018
• Issued: 05/05/2020
• Est. Priority Date: 03/03/2016
• Status: Active Grant

• Current Assignee: IHI Corporation
• Original Assignee: IHI Corporation
• Inventors: Asakawa, Takao, Segawa, Kenichi, Kobayashi, Takahiro, Sakisaka, Ryota, Takeuchi, Kazuko, Bunno, Kenji
• Primary Examiner(s): Brockman, Eldon T
• Application Number:
  US16/104,172
• Publication Number:
  US 20180363493A1
• Time in Patent Office: 627 Days
• CPC Class Codes: F01D 17/165 for radial flow, i.e. the vanes turning around axes which are essentially parallel to the rotor centre line F01D17/167 takes precedence
• CPC Class Codes: F02B 37/24 by using pumps or turbines with adjustable guide vanes
• CPC Class Codes: F02C 6/12 Turbochargers, i.e. plants for augmenting mechanical power output of internal-combustion piston engines by increase of charge pressure
• CPC Class Codes: F05D 2220/40 in turbochargers
• CPC Class Codes: F05D 2240/128 Nozzles
• CPC Class Codes: Y02T 10/12 Improving ICE efficiencies

Abstract

A nozzle drive mechanism includes: a plurality of nozzle vanes; a plurality of link plates each fixed to a shaft portion of one of the plurality of nozzle vanes; a nozzle ring having an annular main body portion including shaft holes, each of which pivotally supporting a shaft portion of one of the nozzle vanes, the nozzle ring arranged between the link plates and the nozzle vanes; a regulation pin having one end attached to the main body portion of the nozzle ring and the other end protruding from an opposing surface of one of the link plates facing the nozzle ring; and a positioning pin provided separately from the regulation pin and assembled to a wall portion positioned opposite to the nozzle ring across the link plate at a position where the positioning pin is brought into contact when the nozzle ring rotates.

Claims

1. A nozzle drive mechanism comprising:

a plurality of nozzle vanes;

a plurality of link plates each provided to a shaft portion of one of the plurality of nozzle vanes;

a nozzle ring having an annular main body portion including shaft holes, each of which pivotally supporting a shaft portion of one of the nozzle vanes, the nozzle ring arranged between the link plates and the nozzle vanes;

a regulation pin having one end side thereof attached to the main body portion of the nozzle ring and the other end thereof protruding from an opposing surface of one of the link plates facing the nozzle ring;

a positioning pin provided separately from the regulation pin and assembled to a wall portion positioned opposite to the nozzle ring across the link plate at a position where the positioning pin is brought into contact when the nozzle ring rotates; and

a ring hole penetrating through the main body portion of the nozzle ring and into which the end of the regulation pin is press-fitted to a position in the nozzle ring that is flush with an open surface positioned on a side opposite to the link plates.

2. The nozzle drive mechanism according to claim 1, further comprising:

an insertion hole formed in the wall portion and into which the positioning pin is inserted.

3. The nozzle drive mechanism according to claim 1, further comprising:

a positioning portion formed in the main body portion of the nozzle ring and formed by a hole or a groove through which the positioning pin is inserted, an inner wall surface of the positioning portion positioned inward in a radial direction of the main body portion with respect to the positioning pin is spaced apart from the positioning pin.

4. The nozzle drive mechanism according to claim 2, further comprising:

a positioning portion formed in the main body portion of the nozzle ring and formed by a hole or a groove through which the positioning pin is inserted, an inner wall surface of the positioning portion positioned inward in a radial direction of the main body portion with respect to the positioning pin is spaced apart from the positioning pin.

5. A turbocharger comprising the nozzle drive mechanism according to claim 1.

6. A turbocharger comprising the nozzle drive mechanism according to claim 2.

7. A turbocharger comprising the nozzle drive mechanism according to claim 3.

8. A turbocharger comprising the nozzle drive mechanism according to claim 4.

9. A variable-capacity turbocharger comprising:

a nozzle drive mechanism having a plurality of nozzle vanes and a plurality of link plates each fixed to a shaft portion of one of the plurality of nozzle vanes;

an annular main body portion including shaft holes, each of which pivotally supporting a shaft portion of one of the nozzle vanes;

a nozzle ring arranged between the link plates and the nozzle vanes;

a regulation pin having one end fixed to the main body portion of the nozzle ring and the other end protruding from an opposing surface of one of the link plates facing the nozzle ring;

a positioning pin provided separately from the regulation pin and assembled to a wall portion, of a housing, positioned opposite to the nozzle ring across the link plate at a position where the positioning pin is brought into contact when the nozzle ring rotates;

a housing hole formed in the wall portion and into which the positioning pin is inserted; and

a ring hole penetrating through the main body portion of the nozzle ring and into which the end of the regulation pin is press-fitted to a position in the nozzle ring that is flush with an open surface positioned on a side opposite to the link plates.