Rotor with balancing features and balancing method

Patent metadata

Field	Value
Publication number	US-2023111525-A1
Application number	US-202117450719-A
Country	US
Kind code	A1
Filing date	Oct 13, 2021
Priority date	Oct 13, 2021
Publication date	Apr 13, 2023
Grant date	—

Abstract

A rotor of a fluid machine includes a wheel with a plurality of blades. Furthermore, the rotor includes an inter-blade area defined circumferentially between a first blade and a second blade of the plurality of blades with respect to the axis of rotation. Moreover, the rotor includes a balancing mark on the wheel and within the inter-blade area. The balancing mark is elongate and has a first end and a second end. The first end and the second end are stepped axially into the inter-blade area. The balancing mark extends arcuately between the first end and the second end. The balancing mark has a depth that varies as the balancing mark extends arcuately between the first end and the second end. The balancing mark has a width that varies as the balancing mark extends arcuately between the first end and the second end.

First claim

1 . A rotor of a fluid machine comprising:
a wheel that is supported for rotation about an axis of rotation, the wheel extending outward in a radial direction from the axis of rotation and terminating at an outer rim edge of the wheel; a plurality of blades included on the wheel; an inter-blade area defined circumferentially between a first blade and a second blade of the plurality of blades with respect to the axis of rotation; and a balancing mark on the wheel and recessed within the inter-blade area, the balancing mark being elongate and having a first end and a second end, the first end and the second end being stepped axially into the inter-blade area, the balancing mark extending arcuately between the first end and the second end, the balancing mark having a depth that varies as the balancing mark extends arcuately between the first end and the second end, the balancing mark having a width that varies as the balancing mark extends arcuately between the first end and the second end, the balancing mark being spaced inwardly in the radial direction from the outer rim edge.

2 . The rotor of claim 1 , wherein the first blade includes a pressure side, and the second blade includes a suction side, the pressure side facing toward the suction side across the inter-blade area;
wherein the first end is disposed proximate the pressure side of the first blade, and wherein the second end is disposed proximate the suction side of the second blade; and wherein the depth at the first end is greater than the depth at the second end.

3 . The rotor of claim 2 , wherein the depth of the balancing mark is greatest at the first end.

4 . The rotor of claim 2 , wherein the wheel includes a first fillet at a transition between the inter-blade area and the first blade, wherein the wheel includes a second fillet at another transition between the inter-blade area and the second blade; and
wherein the first end is recessed into the first fillet; and wherein the second fillet is uninterrupted by the second end.

5 . The rotor of claim 2 , wherein the wheel includes a first fillet at a transition between the inter-blade area and the first blade, wherein the wheel includes a second fillet at another transition between the inter-blade area and the second blade;
wherein the first fillet is uninterrupted by the first end; and wherein the second fillet is uninterrupted by the second end.

6 . The rotor of claim 1 , wherein the balancing mark extends along an arcuate axis between the first end and the second end; and
wherein the arcuate axis is centered substantially on the axis of rotation.

7 . The rotor of claim 1 , wherein the balancing mark extends arcuately; and
wherein the balancing mark is off-center with respect to the axis of rotation.

8 . The rotor of claim 7 , wherein the wheel defines a direction of rotation about the axis of rotation, wherein the arcuate axis is bowed between the first end and the second end, and wherein the arcuate axis is bowed along the direction of rotation.

9 . The rotor of claim 7 , wherein the wheel defines a direction of rotation about the axis of rotation, wherein the arcuate axis is bowed between the first end and the second end, and wherein the arcuate axis is bowed opposite the direction of rotation.

10 . The rotor of claim 7 , wherein the wheel includes an outer rim edge with a portion that is adjacent the balancing mark;
wherein the arcuate axis is bowed between the first end and the second end, and wherein the arcuate axis is bowed toward the portion of the outer rim edge.

11 . The rotor of claim 7 , wherein the wheel includes an outer rim edge with a portion that is adjacent the balancing mark;
wherein the arcuate axis is bowed between the first end and the second end, and wherein the arcuate axis is bowed away from the portion of the outer rim edge.

12 - 19 . (canceled)

20 . A fluid charger device comprising:
a housing; a rotor supported for rotation within the housing for rotation about an axis of rotation; a wheel of the rotor with a face that extends out in a radial direction from the axis of rotation and terminates in the radial direction at an outer rim edge of the wheel, the wheel including a plurality of blades that extend from the face, the wheel defining a direction of rotation about the axis of rotation; an inter-blade area of the face defined circumferentially between a first blade and a second blade of the plurality of blades with respect to the axis of rotation; and a balancing mark recess on the face of the wheel and within the inter-blade area, the balancing mark being recessed into the face, the balancing mark recess being elongate and having a first end and a second end spaced apart across the face, the first end and the second end being recessed and stepped axially into the inter-blade area, the balancing mark recess extending arcuately between the first end and the second end, the balancing mark recess having a depth that is measured along the axis of rotation from a surrounding area of the face surrounding the balancing mark recess, the depth varying gradually as the balancing mark recess extends arcuately between the first end and the second end, the balancing mark having a width that is measured in the radial direction between an inboard edge and an outboard edge of the balancing mark recess, the width varying gradually as the balancing mark recess extends arcuately between the first end and the second end, the first end and the second end being cupped ends, the balancing mark recess being spaced inwardly in the radial direction from the outer rim edge of the wheel to the outboard edge of the balancing mark recess; and the first blade including a pressure side and the second blade includes a suction side with respect to the direction of rotation, the pressure side facing toward the suction side across the inter-blade area, the first end being disposed proximate the pressure side of the first blade, and the second end being disposed proximate the suction side of the second blade, the depth at the first end being greater than the depth at the second end, and the width at the first end being greater than the width at the second end.

21 . The fluid charger device of claim 20 , wherein the wheel includes a first fillet at a transition between the inter-blade area and the first blade, wherein the wheel includes a second fillet at another transition between the inter-blade area and the second blade; and
wherein the first end is recessed into the first fillet; and wherein the second fillet is uninterrupted by the second end.

22 . The fluid charger device of claim 20 , wherein the wheel includes a first fillet at a transition between the inter-blade area and the first blade, wherein the wheel includes a second fillet at another transition between the inter-blade area and the second blade;
wherein the first fillet is uninterrupted by the first end; and wherein the second fillet is uninterrupted by the second end.

23 . The fluid charger device of claim 20 , wherein the balancing mark extends along an arcuate axis between the first end and the second end; and
wherein the arcuate axis is centered substantially on the axis of rotation.

24 . The fluid charger device of claim 20 , wherein the balancing mark recess extends along an arcuate axis between the first end and the second end; and
wherein the arcuate axis is off-center with respect to the axis of rotation.

25 . The fluid charger device of claim 24 , wherein the arcuate axis is bowed between the first end and the second end, an

Assignees

• Garrett Transportation I Inc

Inventors

• Roberts Quentin
• Ealumalai Karunakaran
• Nedelcu Razvan
• Silviu Stoicescu Alexandru
• Danicescu Alexandru
• Adanir Bekir

Classifications

• Y02T10/12

  Improving ICE efficiencies · CPC title

• F01D5/027 Primary

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

• F04D29/662 Primary

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

• F02C6/12

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

• F05D2250/294

  grooved · CPC title