Turbine rotor blade, turbocharger, and method for producing turbine rotor blade

Patent metadata

Field	Value
Publication number	US-11512634-B2
Application number	US-201816960146-A
Country	US
Kind code	B2
Filing date	Jan 11, 2018
Priority date	Jan 11, 2018
Publication date	Nov 29, 2022
Grant date	Nov 29, 2022

Abstract

A turbine rotor blade according to at least one embodiment of the present invention is to be connected to a rotational shaft so as to be rotatable around an axis and includes: a hub having a hub surface inclined with respect to the axis in a cross-section along the axis; at least one rotor blade disposed on the hub surface; and a connection passage disposed inside the turbine rotor blade and connecting a first opening disposed in the at least one rotor blade and a second opening disposed downstream of the first opening in the turbine rotor blade.

First claim

The invention claimed is:

1. A turbine rotor blade to be connected to a rotational shaft so as to be rotatable around an axis, comprising:
a hub having a hub surface inclined with respect to the axis in a cross-section along the axis;
at least one rotor blade disposed on the hub surface; and
a connection passage disposed inside the at least one rotor blade and connecting a first opening disposed in the at least one rotor blade and a second opening disposed downstream of the first opening in the at least one rotor blade,
wherein the second opening includes an edge surface opening disposed on an edge surface of a trailing edge of the at least one rotor blade.

2. A turbine rotor blade to be connected to a rotational shaft so as to be rotatable around an axis, comprising:
a hub having a hub surface inclined with respect to the axis in a cross-section along the axis;
at least one rotor blade disposed on the hub surface; and
a connection passage disposed inside the at least one rotor blade and connecting a first opening disposed in the at least one rotor blade and a second opening disposed downstream of the first opening in the at least one rotor blade,
wherein the at least one rotor blade includes a first rotor blade and a second rotor blade adjacent to a suction side of the first rotor blade, and
wherein the second opening includes a blade surface opening disposed on a blade surface on the suction side of the first rotor blade at a position adjacent to a trailing edge of the first rotor blade with respect to a throat portion at which the first rotor blade is closest to a pressure side of the second rotor blade.

3. The turbine rotor blade according to claim 2 ,
wherein the second opening includes an edge surface opening disposed on an edge surface of a trailing edge of the at least one rotor blade, and the blade surface opening.

4. The turbine rotor blade according to claim 2 ,
wherein when a part of the at least one rotor blade on a leading edge side with respect to a center position on a meridional line of the rotor blade is defined as a leading-edge-side region, and a remaining part of the rotor blade on a trailing edge side is defined as a trailing-edge-side region, the second opening is disposed in the trailing-edge-side region of the rotor blade, and
wherein the second opening is disposed at a position closer to the hub surface than a spanwise center position of the rotor blade.

5. The turbine rotor blade according to claim 2 ,
wherein the first opening is formed on a blade surface on a suction side of the at least one rotor blade.

6. The turbine rotor blade according to claim 2 ,
wherein the first opening is formed on a blade surface on a pressure side of the at least one rotor blade.

7. The turbine rotor blade according to claim 2 ,
wherein when a part of the at least one rotor blade on a leading edge side with respect to a center position on a meridional line of the rotor blade is defined as a leading-edge-side region, and a remaining part of the rotor blade on a trailing edge side is defined as a trailing-edge-side region, the first opening is disposed in the leading-edge-side region of the rotor blade, and
wherein the first opening is disposed at a position farther from the hub surface than a spanwise center position of the rotor blade.

8. The turbine rotor blade according to claim 2 ,
wherein an opening area of the first opening is larger than an opening area of the second opening.

9. A turbine rotor blade to be connected to a rotational shaft so as to be rotatable around an axis, comprising:
a hub having a hub surface inclined with respect to the axis in a cross-section along the axis;
at least one rotor blade disposed on the hub surface; and
a connection passage disposed inside the at least one rotor blade and connecting a first opening disposed in the at least one rotor blade and a second opening disposed on a tip surface of the hub,
wherein when a part of the at least one rotor blade on a leading edge side with respect to a center position on a meridional line of the rotor blade is defined as a leading-edge-side region, and a remaining part of the rotor blade on a trailing edge side is defined as a trailing-edge-side region,
the first opening is disposed in the leading-edge-side region of the rotor blade.

Assignees

• Mitsubishi Heavy Ind Engine & Turbocharger Ltd

Inventors

• Yokoyama Takao
• Hoshi Toru
• Yoshida Toyotaka
• Sakamoto Keigo

Classifications

• F02B39/00

  Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00 · CPC title

• F01D5/048 Primary

  Form or construction · CPC title

• F01D5/04

  for radial-flow machines or engines · CPC title

• F02C6/12 Primary

  Turbochargers, i.e. plants for augmenting mechanical power output of internal-combustion piston engines by increase of charge pressure · CPC title

• F05D2220/40

  in turbochargers · CPC title