KR101612854B1 - Impeller assembly of fluid rotary machine - Google Patents
Impeller assembly of fluid rotary machine Download PDFInfo
- Publication number
- KR101612854B1 KR101612854B1 KR1020120148872A KR20120148872A KR101612854B1 KR 101612854 B1 KR101612854 B1 KR 101612854B1 KR 1020120148872 A KR1020120148872 A KR 1020120148872A KR 20120148872 A KR20120148872 A KR 20120148872A KR 101612854 B1 KR101612854 B1 KR 101612854B1
- Authority
- KR
- South Korea
- Prior art keywords
- blade
- shroud
- shroud plate
- base portion
- impeller
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/24—Vanes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/02—Selection of particular materials
- F04D29/023—Selection of particular materials especially adapted for elastic fluid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/02—Selection of particular materials
- F04D29/026—Selection of particular materials especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2205—Conventional flow pattern
- F04D29/2222—Construction and assembly
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/284—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for compressors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/30—Vanes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
- F04D29/624—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
- F04D29/628—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for liquid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2230/00—Manufacture
- F05D2230/20—Manufacture essentially without removing material
- F05D2230/23—Manufacture essentially without removing material by permanently joining parts together
- F05D2230/232—Manufacture essentially without removing material by permanently joining parts together by welding
- F05D2230/237—Brazing
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The impeller assembly of the fluid rotary machine includes a rotary shaft, a base portion coupled to the outer side of the rotary shaft, a radially extending portion extending radially outward from the rotary shaft, spaced apart in the circumferential direction about the rotary shaft, And a plurality of shroud plates disposed between the adjoining blades, wherein the edges are seated on the stepped portions of adjacent blades, and the stepped portions and the edges are welded to each other.
Description
Embodiments relate to an impeller assembly of a fluid rotary machine, and more particularly to an impeller assembly having an improved efficiency by integrally forming an impeller and a shroud.
A compressor or a pump for compressing a fluid has a structure of a rotating machine having a rotating part.
Generally, such a rotating machine has an impeller as a rotating part, and the impeller functions to increase the pressure of the fluid by transmitting rotational kinetic energy to the fluid. The impeller includes a plurality of blades that assist in fluid movement and transfer energy to the fluid.
On the other hand, a shroud is disposed outside the impeller, and the shroud functions as a fluid passage along with the blade.
Generally, as the interval between the blades and the shroud becomes narrower, the efficiency of the compressor increases. Therefore, a technique of maximizing the efficiency of the compressor by manufacturing a shroud in combination with the impeller has recently been proposed.
In the case of a technique in which the impeller is combined with the shroud, a process of fixing the impeller blades and the shroud to each other is required. For this purpose, processes such as a casting process, a brazing process, and an electron beam welding process are used.
Japanese Unexamined Patent Application Publication No. 2004-353608 discloses a technique for welding and reinforcing a shroud to an impeller. The impeller and the shroud are fixed to each other by simply welding the impeller and the shroud in contact with each other. However, according to this method, during the process of welding the impeller and the shroud, the shape of the impeller and the shroud can be severely deformed due to excessive heat input.
An object of embodiments is to provide an impeller assembly of a fluid rotary machine in which efficiency is improved by integrally forming an impeller and a shroud.
Another object of the embodiments is to provide an impeller assembly of a fluid rotary machine having a stable structure by improving the welding strength of the blades of the shroud and the impeller.
The impeller assembly of the fluid rotating machine according to one embodiment includes a rotating shaft, a base portion coupled to the outside of the rotating shaft and extending in the circumferential direction, and a plurality of radially extending portions extending radially outward from the rotating shaft, A plurality of blades disposed in the base portion and having a step portion whose width is narrowed at an end portion facing the opposite side of the base portion; and a plurality of blades disposed between the adjacent blades and having the edges seated in the stepped portions of the adjacent blades, And a plurality of shroud plates coupled by welding.
A brazing filler is applied to a portion of the shroud plate facing the shroud plate at a portion facing the shroud plate so that the portion where the blade and the shroud plate contact each other can be connected by a brazing process.
The stepped portion of the blade may be formed extending at least in a section along the blade in a radial direction toward the outside from the rotation axis.
Since the impeller assembly of the fluid rotary machine according to the embodiments as described above is fixed to each other by welding so that the blades and the shroud plates satisfy a precise tolerance level, the gap between the blades and the shroud plate is set to a design level So that the efficiency of the fluid rotary machine is improved.
Further, since the welding process is applied in a state where the stepped portion of the blade and the edge of the shroud plate are stably installed, it is possible to secure a large welding area area. Therefore, it is possible to minimize the occurrence of phenomena such as cracks at the joint surface between the shroud plate and the blade during the welding process.
In addition, by applying a brazing process to the contact surfaces of the shroud plate and the blade facing the base while the shroud plate and the blade are fixed to each other by the welding process, the inner side of the shroud plate and the blade can be more stably bonded to each other.
1 is a perspective view schematically showing an assembly process of an impeller assembly of a fluid rotary machine according to an embodiment.
Figure 2 is a schematic cross-sectional view of the impeller assembly of Figure 1;
3 is a cross-sectional view taken along line III-III of the impeller assembly of FIG.
4 is a cross-sectional view showing a state in which a welding process is applied to the impeller assembly of FIG. 1;
Hereinafter, the structure and operation of the impeller assembly of the fluid rotary machine relating to the embodiments will be described in detail through the embodiments of the accompanying drawings. The expression " and / or " used in the description refers to one of the elements or a combination of elements.
FIG. 1 is a perspective view schematically showing an assembly process of an impeller assembly of a fluid rotary machine according to one embodiment, and FIG. 2 is a schematic cross-sectional view of the impeller assembly of FIG.
The
In the illustrated embodiment, the rotary machine is implemented as a compressor, but the embodiment is not limited thereto. That is, it is sufficient that the rotating machine according to the embodiment can change the pressure and the velocity of the fluid by the rotational motion of the impeller assembly. For example, the rotary machine according to the embodiment is a comprehensive concept including a pump, a blower, and the like.
The
The
The
The
The
Referring to FIG. 2, the process of compressing the fluid by the rotational motion of the impeller assembly will be described below. When the rotary shaft 111a rotates, for example, the
The fluid introduced through the
FIG. 3 is a cross-sectional view taken along line III-III of the impeller assembly of FIG. 1, and FIG. 4 is a cross-sectional view illustrating a state where a welding process is applied to the impeller assembly of FIG.
Hereinafter, a method of manufacturing an impeller assembly according to an embodiment will be described with reference to FIGS. 3 and 4. FIG.
As a component for constituting the rotating machine, a plurality of
Lightweight carbon steel may be used for the
The
The
1, the thickness of the
After the
The welding strength when the
For the welding process, welding using high-density energy can be applied. For example, welding using a laser or an electron beam can be used. When using a metal material such as aluminum to weld the shroud plate to the blade, the shroud plate and blades melt due to the high energy applied to form the fillet, if the laser or electron beam is used, to deviate from the required tolerance It is impossible to obtain an outer shape of the impeller assembly designed originally. On the other hand, when welding is performed using low energy, incomplete melting defects occur due to insufficient melting.
Since the welding process is applied in a state where the stepped
4, a
The brazing process may be applied after the welding process of the
Since the
The
The construction and effect of the above-described embodiments are merely illustrative, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Accordingly, the true scope of protection of the invention should be determined by the appended claims.
100a:
100b: outlet 113: blade
100:
110:
111: rotating shaft 120: shroud
111a: rotating shaft 141: brazing filler
112: Base portion
Claims (3)
A base portion coupled to the outside of the rotation shaft and extending in the circumferential direction;
A plurality of blades extending in a radial direction from the rotating shaft toward the outside and spaced apart from each other in the circumferential direction about the rotating shaft and disposed at the base portion and having a stepped portion at an end portion facing the opposite side of the base portion; And
And a plurality of shroud plates disposed between the adjacent blades and having an edge mounted on the stepped portion of the adjacent blade and the edge contacting the stepped portion and being joined to the stepped portion by welding,
The surface of the end portion of the blade facing the opposite side of the base portion and the surface of the shroud plate facing the opposite side of the base portion coincide with each other,
The step and the edge are welded from the surface of the end of the blade toward the opposite side of the base portion and from the surface of the shroud plate.
Wherein a brazing filler is applied to a portion of the shroud plate facing the shroud plate so that the blade and the shroud plate contact each other at a portion facing the shroud plate by a brazing process.
Wherein the step of the blade is formed extending at least in part along the blade in a radial direction outwardly from the rotational axis.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020120148872A KR101612854B1 (en) | 2012-12-18 | 2012-12-18 | Impeller assembly of fluid rotary machine |
PCT/KR2013/011579 WO2014098417A1 (en) | 2012-12-18 | 2013-12-13 | Impeller assembly of fluid rotary machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020120148872A KR101612854B1 (en) | 2012-12-18 | 2012-12-18 | Impeller assembly of fluid rotary machine |
Publications (2)
Publication Number | Publication Date |
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KR20140079194A KR20140079194A (en) | 2014-06-26 |
KR101612854B1 true KR101612854B1 (en) | 2016-04-26 |
Family
ID=50978677
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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KR1020120148872A KR101612854B1 (en) | 2012-12-18 | 2012-12-18 | Impeller assembly of fluid rotary machine |
Country Status (2)
Country | Link |
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KR (1) | KR101612854B1 (en) |
WO (1) | WO2014098417A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR102208490B1 (en) * | 2014-07-07 | 2021-01-27 | 한화에어로스페이스 주식회사 | Method for manufacturing rotation part of rotary machine |
KR102347638B1 (en) * | 2017-08-08 | 2022-01-05 | 한화파워시스템 주식회사 | Semi-shrouded impeller |
CN114901920A (en) * | 2019-12-09 | 2022-08-12 | 丹佛斯公司 | Shrouded impeller assembly for a compressor |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009105208A2 (en) * | 2008-02-22 | 2009-08-27 | Horton, Inc. | Fan manufacturing and assembly |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005146962A (en) * | 2003-11-14 | 2005-06-09 | Hitachi Industries Co Ltd | Centrifugal impeller and its manufacturing method |
JP4458109B2 (en) * | 2007-03-27 | 2010-04-28 | 株式会社日立プラントテクノロジー | Weld groove sealing structure |
US8727729B2 (en) * | 2010-06-29 | 2014-05-20 | Turbocam, Inc. | Method for producing a shrouded impeller from two or more components |
KR101247315B1 (en) * | 2010-12-28 | 2013-03-25 | 삼성테크윈 주식회사 | Method of manufacturing rotation part of rotary machine |
-
2012
- 2012-12-18 KR KR1020120148872A patent/KR101612854B1/en active IP Right Grant
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2013
- 2013-12-13 WO PCT/KR2013/011579 patent/WO2014098417A1/en active Application Filing
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009105208A2 (en) * | 2008-02-22 | 2009-08-27 | Horton, Inc. | Fan manufacturing and assembly |
Also Published As
Publication number | Publication date |
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KR20140079194A (en) | 2014-06-26 |
WO2014098417A1 (en) | 2014-06-26 |
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