Impeller with sealing portion

Patent metadata

Field	Value
Publication number	US-9708921-B2
Application number	US-201314084787-A
Country	US
Kind code	B2
Filing date	Nov 20, 2013
Priority date	Nov 30, 2012
Publication date	Jul 18, 2017
Grant date	Jul 18, 2017

Abstract

There is provided an impeller rotating about a rotary shaft, the impeller including: an inlet through which a fluid is introduced; an outlet through which the fluid is discharged; a supporter connected to the rotary shaft; a blade portion provided on the supporter; a shroud portion disposed to cover the blade portion; and a sealing portion including at least one sealing protrusion protruding in a direction that is in parallel with the rotary shaft, and disposed at a portion of the shroud portion, which configures the inlet.

First claim

What is claimed is:

1. An impeller rotating about a rotary shaft, the impeller comprising:
an inlet through which a fluid is introduced;
an outlet through which the fluid is discharged;
a supporter connected to the rotary shaft;
a blade portion provided on the supporter;
a shroud disposed to cover the blade portion; and
a seal including at least one sealing protrusion protruding in an axial direction of the rotary shaft, the seal being coupled to the shroud at an outermost end of the shroud along the axial direction thereby forming a junction between the shroud and the seal,
wherein a width of the seal, in a radial direction of the shaft, being measured above the junction between the seal and the shroud is greater than a width of the shroud, in the radial direction of the shaft, being measured at the junction.

2. The impeller of claim 1 , wherein the impeller is provided in a compressor or a pump.

3. The impeller of claim 1 , wherein the at least one sealing protrusion is disposed above a topmost portion of the supporter where the inlet is disposed.

4. The impeller of claim 3 , wherein a bonding portion, where the seal and the shroud are bonded to each other, is disposed above the topmost portion of the supporter where the inlet is disposed.

5. The impeller of claim 1 , wherein the seal has a ring shape.

6. The impeller of claim 1 , wherein an inner-most portion of the seal along the radial direction is attached to the portion of the shroud configuring the inlet.

7. The impeller of claim 1 , wherein the at least one sealing protrusion comprises a plurality of sealing protrusions.

8. The impeller of claim 7 , wherein each sealing protrusion of the plurality of sealing protrusions has a ring shape.

9. An impeller rotating about a rotary shaft, the impeller comprising:
an inlet through which a fluid is introduced;
an outlet through which the fluid is discharged;
a supporter configured to rotate when the rotary shaft rotates;
a blade portion provided on the supporter;
a shroud disposed to cover the blade portion; and
a seal being coupled to the shroud at an outermost end of the shroud along an axial direction, the outermost end configured the inlet along with a topmost surface of the supporter, the seal and the shroud being coupled at a junction between the seal and the shroud,
wherein a topmost surface of the seal is higher than the topmost surface of the supporter, and
wherein a width of the seal, in a radial direction of the shaft, being measured above the junction between the seal and the shroud is greater than a width of the shroud, in the radial direction of the shaft, being measured at the junction.

10. The impeller of claim 9 , wherein the topmost surface of the seal comprises at least one sealing protrusion.

11. The impeller of claim 10 , wherein the at least one sealing protrusion comprises a plurality of sealing protrusions.

12. The impeller of claim 11 , wherein each sealing protrusion of the plurality of sealing protrusions has a ring shape.

13. The impeller of claim 9 , wherein the shroud and the seal constitutes a single body.

14. The impeller of claim 9 , wherein an inner-most portion of the seal along the radial direction is attached to the portion of the shroud configuring the inlet.

Assignees

• Hanwha Techwin Co Ltd

Inventors

• Ahn Jong-Kee

Classifications

• F01D5/021

  for flow machines or engines with only one axial stage (for more than one stage F01D5/06) · CPC title

• F01D11/00 Primary

  Preventing or minimising internal leakage of working-fluid, e.g. between stages (sealings in general F16J {; sealing arrangements for transition ducts of combustor cans F01D9/023}) · CPC title

• F01D1/023 Primary

  the working-fluid being divided into several separate flows (F01D3/02 takes precedence); several separate fluid flows being united in a single flow; the machine or engine having provision for two or more different possible fluid flow paths · CPC title

• F04D29/162

  of a centrifugal flow wheel · CPC title

• F01D1/32

  with pressure velocity transformation exclusively in rotor, e.g. the rotor rotating under the influence of jets issuing from the rotor, {e.g. Heron turbines (the working fluid being a combustion products F02C3/165; jet propulsion plants per se F02K)} · CPC title