Rotor with balancing features and balancing method

Patent metadata

Field	Value
Publication number	US-10989224-B2
Application number	US-201816190864-A
Country	US
Kind code	B2
Filing date	Nov 14, 2018
Priority date	Nov 14, 2018
Publication date	Apr 27, 2021
Grant date	Apr 27, 2021

Abstract

A rotor for a fluid machine includes a wheel that is supported for rotation about an axis of rotation. The wheel includes a back wall with an outer rim edge. The rotor also includes a plurality of blades that are attached to the back wall and that are spaced apart about the axis of rotation. Moreover, the rotor includes an inter-blade area on the back wall between neighboring ones of the plurality of blades. Furthermore, the rotor includes a balancing feature that is included in the inter-blade area on the back wall. The balancing feature intersects and defines part of the outer rim edge.

First claim

What is claimed is:

1. A rotor for a fluid machine comprising:
a wheel that is supported for rotation about an axis of rotation, the wheel including a back wall with a front face, a back face, and an outer rim edge;
a plurality of blades that are attached to the back wall and that are spaced apart about the axis of rotation;
an inter-blade area on the back wall between neighboring ones of the plurality of blades; and
a balancing aperture that is included in the inter-blade area on the front face of the back wall at the outer rim edge, the aperture having a plurality of portions including, at least, a first portion and a second portion, the first portion having a first depth measured from the front face along the axis of rotation, the second portion having a second depth measured from the front face along the axis of rotation, and the second depth being different from the first depth;
at least one of the first portion and the second portion of the balancing aperture intersecting and defining part of the outer rim edge.

2. The rotor of claim 1 , wherein at least one of the first portion and the second portion of the balancing aperture is elongate and has a major axis that is arcuate.

3. The rotor of claim 2 , wherein the major axis has a radius that is substantially centered on the axis of rotation.

4. The rotor of claim 1 , wherein the at least one of the first portion and the second portion of the balancing aperture has an area of maximum depth measured from the front face; and
wherein the area of maximum depth is disposed inward radially from the outer rim edge.

5. The rotor of claim 1 , wherein the first portion and the second portion are arranged at different radial locations on the front face of the back wall.

6. The rotor of claim 1 , wherein the first portion and the second portion are spaced apart angularly with respect to the axis of rotation.

7. The rotor of claim 1 , wherein the plurality of portions includes a third portion that intersects and shares a common boundary with the second portion.

8. A rotor for a charger device of a fluid machine comprising:
a wheel that is supported for rotation about an axis of rotation, the wheel including a back wall, the back wall including a front face, a back face, and an outer rim edge;
a plurality of blades that are attached to the front face of the back wall and that are spaced apart about the axis of rotation;
an inter-blade area on the front face of the back wall between neighboring ones of the plurality of blades; and
a balancing aperture in the front face in the inter-blade area on the front face of the back wall at the outer rim edge, the aperture having a plurality of portions including, at least, a first portion and a second portion, the first portion having a first depth measured from the front face along the axis of rotation, the second portion having a second depth measured from the front face along the axis of rotation, and the second depth being different from the first depth;
at least one of the first portion and the second portion of the balancing aperture feature intersecting and defining part of the outer rim edge;
the balancing aperture being elongate and having a major axis that is arcuate, the major axis having a radius that is centered substantially on the axis of rotation.

9. The rotor of claim 8 ,
wherein at least one of the first portion and the second portion of the balancing aperture has a point of maximum depth measured from the front face; and
wherein the point of maximum depth is disposed inward radially from the outer rim edge.

10. The rotor of claim 8 , wherein the wheel is a compressor wheel of the rotor.

11. The rotor of claim 10 , wherein the charger device is a turbocharger.

12. The rotor of claim 8 , wherein the first portion and the second portion are arranged at different radial locations on the front face of the back wall.

13. The rotor of claim 8 , wherein the first portion and the second portion are spaced apart angularly with respect to the axis of rotation.

14. The rotor of claim 8 , wherein the plurality of portions includes a third portion that intersects and shares a common boundary with the second portion.

Assignees

• Garrett Transportation I Inc

Inventors

• Roberts Quentin
• Singh Gautam
• Ealumalai Karunakaran
• Baluta Laurentiu
• Rychvalsky Rado

Classifications

• G01M1/34

  by removing material from the body to be tested, e.g. from the tread of tyres · CPC title

• F01D5/027 Primary

  Arrangements for balancing (for balancing rotating bodies in general F16F15/32; for compensating imbalance G01M1/36) · CPC title

• F05D2230/10

  by removing material · CPC title

• F05D2220/40

  in turbochargers · CPC title

• F04D29/662 Primary

  Balancing of rotors (compensating imbalance G01M1/36) · CPC title