EP2113054A1 - Rotor constitué d'un matériau plat - Google Patents

Rotor constitué d'un matériau plat

Info

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
Application number
EP08759127A
Other languages
German (de)
English (en)
Other versions
EP2113054B1 (fr
Inventor
Thomas Materne
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wilo SE
Original Assignee
Wilo AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Wilo AG filed Critical Wilo AG
Publication of EP2113054A1 publication Critical patent/EP2113054A1/fr
Application granted granted Critical
Publication of EP2113054B1 publication Critical patent/EP2113054B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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)
  • Braking Arrangements (AREA)
  • Mechanical Operated Clutches (AREA)
EP08759127A 2007-06-11 2008-06-10 Rotor constitué d'un matériau plat Active EP2113054B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007027370A DE102007027370A1 (de) 2007-06-11 2007-06-11 Laufrad aus flächigem Material
PCT/EP2008/004599 WO2008151770A1 (fr) 2007-06-11 2008-06-10 Rotor constitué d'un matériau plat

Publications (2)

Publication Number Publication Date
EP2113054A1 true EP2113054A1 (fr) 2009-11-04
EP2113054B1 EP2113054B1 (fr) 2011-04-06

Family

ID=39684544

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08759127A Active EP2113054B1 (fr) 2007-06-11 2008-06-10 Rotor constitué d'un matériau plat

Country Status (4)

Country Link
EP (1) EP2113054B1 (fr)
AT (1) ATE504745T1 (fr)
DE (2) DE102007027370A1 (fr)
WO (1) WO2008151770A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NZ702814A (en) * 2010-03-09 2016-07-29 Netbio Inc Unitary biochip providing sample-in to results-out processing and methods of manufacture
DE102010020574A1 (de) 2010-05-14 2011-11-17 Ksb Aktiengesellschaft Strömungsführende Einrichtung
IT202100022799A1 (it) * 2021-09-03 2023-03-03 Almes Srl Dispositivo di ventilazione forzata per un forno di cottura

Family Cites Families (6)

* Cited by examiner, † Cited by third party
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 (ru) * 1984-08-15 1986-10-30 Stavinskij Andrej A Способ изготовлени рабочего колеса вентил тора
DD259975A3 (de) 1986-07-07 1988-09-14 Merbelsrod Geraete Pumpen Veb Blechlaufrad kleiner foerderleistung, insbesondere fuer kuehlmittelpumpen
DE4008216A1 (de) * 1990-03-15 1991-09-19 Grundfos Int Verfahren zur herstellung von fluidfuehrenden einrichtungen
DE10052637B4 (de) * 2000-10-24 2021-03-11 Pfeiffer Vacuum Gmbh 16.02.2001 Scheiben für eine Turbomolekularpumpe

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2008151770A1 *

Also Published As

Publication number Publication date
EP2113054B1 (fr) 2011-04-06
DE102007027370A1 (de) 2008-12-18
ATE504745T1 (de) 2011-04-15
WO2008151770A1 (fr) 2008-12-18
DE502008003090D1 (de) 2011-05-19

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