EP2113054A1 - Impeller made of flat material - Google Patents
Impeller made of flat materialInfo
- Publication number
- EP2113054A1 EP2113054A1 EP08759127A EP08759127A EP2113054A1 EP 2113054 A1 EP2113054 A1 EP 2113054A1 EP 08759127 A EP08759127 A EP 08759127A EP 08759127 A EP08759127 A EP 08759127A EP 2113054 A1 EP2113054 A1 EP 2113054A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- impeller
- blades
- impeller according
- bent
- fastening parts
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000463 material Substances 0.000 title claims abstract description 20
- 239000002184 metal Substances 0.000 claims abstract description 9
- 238000005452 bending Methods 0.000 claims description 5
- 230000001154 acute effect Effects 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 238000004080 punching Methods 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 231100000241 scar Toxicity 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Classifications
-
- 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
- F04D29/2233—Construction and assembly entirely open or stamped from one sheet
-
- 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
- F04D29/263—Rotors specially for elastic fluids mounting fan or blower rotors on shafts
-
- 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
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/325—Rotors specially for elastic fluids for axial flow pumps for axial flow fans
Definitions
- the invention relates to an impeller of a pump or a blower of a one-piece material, in particular of sheet metal with a flat central region, on the outer edge of the blades are formed and bent.
- a sheet-metal wheel with a low delivery rate is known from DE 3717229 A1.
- the central region of the impeller plate is deformed to a central sleeve which projects on the rear side of the impeller and in which the pump shaft can be fastened.
- the production of such a cylindrical scar is relatively expensive.
- the object of the invention is to improve an impeller of the type mentioned so that it has a low weight and thus a low moment of inertia with simple cost-effective production. It is also an object of the invention to provide an impeller that allows easy installation and is suitable for smaller pumps or blowers.
- An advantageous embodiment is given when a particular web-shaped portion of the material areas located between the blades is bent to the rear side.
- the fastening parts are bent so far back that they define a space to form the impeller, in or on which the pump shaft can be fastened.
- the fasteners may be bent back around a tangent of the central region.
- a particularly advantageous production with optimum use of the material is achieved when the fasteners sit in the non-bent state in a region of the sheet material, which is formed by a taper of an adjacent blade.
- particularly favorable conveying impeller blades are created, wherein the taper of the blades near the blade root allows a simple rotation of the blade.
- the radial extent of the fastening parts is a quarter to a sixth of the impeller diameter. Furthermore, it is advantageous if the fastening parts are bent backwards by at least 90 degrees. A secure hold on positive engagement with the shaft is achieved when the fasteners are curved in their surface corresponding to the surface of the pump shaft.
- the blades be bent around one Axis are rotated, which corresponds substantially to the longitudinal direction of the blade.
- the blades are rotated about an axis which corresponds to a radius of the impeller or is parallel to a radius of the impeller or is at an acute angle to a radius of the impeller.
- Fig. 1 is a plan view of the impeller forming sheet metal part after his
- Fig. 2 is an oblique view without pump shaft
- Fig. 3 is an oblique view with enclosed pump shaft.
- the impeller 1 of a pump or a blower is punched out of a one-piece, sheet-like material, in particular made of sheet metal, and then has the shape shown in FIG. It has a central central region 2, on which blades 3 are formed in an approximately radial direction. Within an inner region 6, which is larger than the central region 2, the remaining material areas remaining between the blades 3 are used as fastening parts 4, the fastening parts 4 and the blades 3 adjoining each other except for the stamped slots 5 located therebetween.
- Each blade 3 has an outer wider portion 3a which tapers outwardly and an inner portion 3b which tapers towards the center of the rotor and forms a narrow foot portion 3c which merges into the central portion 2.
- the concave taper 3d of the blade 3 surrounds a correspondingly shaped convex bulge 4a of the fastening part 4.
- the blades 3 thus protrude with their outer region 3a beyond the inner region 6, while the fastening parts 4 remain within the region 6 and with their outer ends adjoin this.
- the blades 3 are each bent by an impeller radius A to the front side V of the impeller, wherein in this bending only the foot region 3c is wound.
- the blades are thus rotated about an axis A, which corresponds to a radius A of the running radius. Instead, however, the axis of rotation A may be parallel to a radius of the impeller or be at an acute angle to the radius A. In each of these cases, however, all or a majority of the blade 3 is bent over to the front side V of the impeller. This bend can be 90 degrees or deviate from it.
- the fastening parts 4 are bent around a tangent B of the central region 2 to the rear by at least 90 degrees to form a mounting space 7, in which the pump shaft 8 can be inserted.
- the fasteners 4 surrounded so all around the shaft 8, wherein the fasteners 4 may be curved in its surface corresponding to the surface of the pump shaft, so that all fasteners together with their inner sides as it forms a socket for the shaft 8 and with their inner sides on the outer surface of the Wave 8 abut.
- the blades 3 may be curved in their surface in order to increase the hydraulic efficiency in a preferred direction. Furthermore, the blades may have the same or different structures and the number of blades 3 corresponds to the particular hydraulic requirements for the impeller. To form the fastening parts 4, not the entire material areas located between the blades 3 have to be used. Elongated subareas, in particular in web form, are also sufficient for this purpose.
- the fasteners 4 can give the hub a conical shape, so that a secure hold against twists and displacements of the impeller is given on the shaft.
- Suitable materials for the impeller are steels that have sufficient rigidity, have a suitable spring action to prevent deformation and thus allow a secure attachment of the shaft.
- stainless steel is to be preferred.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Mechanical Operated Clutches (AREA)
- Braking Arrangements (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007027370A DE102007027370A1 (en) | 2007-06-11 | 2007-06-11 | Impeller made of flat material |
PCT/EP2008/004599 WO2008151770A1 (en) | 2007-06-11 | 2008-06-10 | Impeller made of flat material |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2113054A1 true EP2113054A1 (en) | 2009-11-04 |
EP2113054B1 EP2113054B1 (en) | 2011-04-06 |
Family
ID=39684544
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08759127A Active EP2113054B1 (en) | 2007-06-11 | 2008-06-10 | Impeller made of flat material |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2113054B1 (en) |
AT (1) | ATE504745T1 (en) |
DE (2) | DE102007027370A1 (en) |
WO (1) | WO2008151770A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20190111165A (en) * | 2010-03-09 | 2019-10-01 | 에이엔디이 코포레이션 | Unitary biochip providing sample-in to results-out processing and methods of manufacture |
DE102010020574A1 (en) | 2010-05-14 | 2011-11-17 | Ksb Aktiengesellschaft | Flowing device |
IT202100022799A1 (en) * | 2021-09-03 | 2023-03-03 | Almes Srl | FORCED VENTILATION DEVICE FOR A COOKING OVEN |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB440587A (en) * | 1934-12-12 | 1936-01-02 | Humber Ltd | Fans |
GB1062946A (en) * | 1963-11-14 | 1967-03-22 | Speedwell Res Ltd | Improvements in or relating to centrifugal pumps |
SU1267058A1 (en) * | 1984-08-15 | 1986-10-30 | Stavinskij Andrej A | Method of manufacturing fan impeller |
DD259975A3 (en) | 1986-07-07 | 1988-09-14 | Merbelsrod Geraete Pumpen Veb | BLECHLAUFRAD SMALL FOERDERLEISTUNG, ESPECIALLY FOR COOLANT PUMPS |
DE4008216A1 (en) * | 1990-03-15 | 1991-09-19 | Grundfos Int | Mfg. radial blade ring impellers, etc. - forms comb-shaped blank from flat metal and bends tines to form blades |
DE10052637B4 (en) * | 2000-10-24 | 2021-03-11 | Pfeiffer Vacuum Gmbh | 02/16/2001 Discs for a turbo molecular pump |
-
2007
- 2007-06-11 DE DE102007027370A patent/DE102007027370A1/en not_active Withdrawn
-
2008
- 2008-06-10 DE DE502008003090T patent/DE502008003090D1/en active Active
- 2008-06-10 WO PCT/EP2008/004599 patent/WO2008151770A1/en active Application Filing
- 2008-06-10 EP EP08759127A patent/EP2113054B1/en active Active
- 2008-06-10 AT AT08759127T patent/ATE504745T1/en active
Non-Patent Citations (1)
Title |
---|
See references of WO2008151770A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2008151770A1 (en) | 2008-12-18 |
ATE504745T1 (en) | 2011-04-15 |
DE502008003090D1 (en) | 2011-05-19 |
EP2113054B1 (en) | 2011-04-06 |
DE102007027370A1 (en) | 2008-12-18 |
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