EP0316470A1 - Ventilateur radial avec volute interne - Google Patents

Ventilateur radial avec volute interne Download PDF

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Publication number
EP0316470A1
EP0316470A1 EP87116970A EP87116970A EP0316470A1 EP 0316470 A1 EP0316470 A1 EP 0316470A1 EP 87116970 A EP87116970 A EP 87116970A EP 87116970 A EP87116970 A EP 87116970A EP 0316470 A1 EP0316470 A1 EP 0316470A1
Authority
EP
European Patent Office
Prior art keywords
housing
impeller
radial
opening
radial fan
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
EP87116970A
Other languages
German (de)
English (en)
Other versions
EP0316470B1 (fr
Inventor
Wilhelm Reinhardt
Gerhard Ruck
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.)
Elektrobau Mulfingen and Co EBM GmbH
Original Assignee
Elektrobau Mulfingen and Co EBM GmbH
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 Elektrobau Mulfingen and Co EBM GmbH filed Critical Elektrobau Mulfingen and Co EBM GmbH
Priority to DE8787116970T priority Critical patent/DE3786171D1/de
Priority to EP19870116970 priority patent/EP0316470B1/fr
Publication of EP0316470A1 publication Critical patent/EP0316470A1/fr
Application granted granted Critical
Publication of EP0316470B1 publication Critical patent/EP0316470B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/4226—Fan casings
    • F04D29/4233—Fan casings with volutes extending mainly in axial or radially inward direction
    • 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
    • F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers

Definitions

  • the invention relates to a radial fan, in particular for gaseous media, such as air, consisting of a housing with a substantially cylindrical peripheral wall, a front and a rear end wall, an inlet opening and an outlet opening, and a concentrically arranged within the housing about an axis of rotation
  • Radial impeller which has a rear cover disk connected to a drive shaft with essentially radially arranged radial blades, which are distributed in the circumference and extend axially from the rear cover disk in the direction of the front end wall, and preferably one with the rotor blades on their has rear cover plate axially opposite side connected front cover plate, the blades with their radially inner ends surrounding an axial inlet connected to the inlet opening, and at least within the housing in the axial direction on one side of the impeller an inner spiral chamber is formed which widens in cross section in the direction of rotation of the impeller and merges into the outlet opening.
  • Such a radial fan with an internal spiral is known from the literature reference "Bruno Eck, Ventilatoren, Springer-Verlag, 5th edition 1972, pages 212 and 213".
  • the spiral which is laid inwards has the consequence that the housing itself can be cylindrical.
  • the impeller of the known radial fan has both a front and a rear cover plate, each of which extends in the radial direction up to the outer ends of the blades.
  • the peripheral wall of the housing must enclose the impeller with a radial distance so that the axially sucked-in and radially accelerated or compressed medium radially flow out of the impeller and in the axial direction into the inner spiral chamber adjacent to the impeller and from there again radially or tangentially the outlet opening can flow.
  • the known radial fan presumably due to this guidance or deflection of the medium, causes a relatively high level of noise and has an unsatisfactory efficiency and a relatively flat characteristic curve.
  • the invention has for its object to minimize the noise, optimize the efficiency and improve the characteristic in a radial fan of the generic type.
  • this is achieved in that the rotor blades of the impeller with their radial direction outer ends in the immediate vicinity in front of the inner surface of the peripheral wall of the housing, and that the cover disk facing the inner spiral chamber has an annular opening opening into the inner spiral chamber in the axial direction.
  • “close proximity” is to be understood as the smallest possible radial distance between the ends of the rotor blades and the circumferential wall, which enables a smooth rotation of the impeller within the housing. (An air flow in the radial direction should be as small as possible.
  • the distance between the outer ends of the blades and the inner surface of the peripheral wall can be up to about 5% of the diameter of the impeller.
  • the design according to the invention creates a radial blower which, in comparison to designs known from the prior art, has a very steep characteristic curve, has a good efficiency and the noise level is reduced to a minimum.
  • the radial fan according to the invention can also be made much smaller and more compact, since according to the invention a radial distance between the impeller and the peripheral wall of the housing is unnecessary.
  • Air flow in the radial direction should be as low as possible.
  • the distance between the outer ends of the rotor and the inner surface of the peripheral wall can be up to approximately 5% of the diameter of the impeller.
  • a radial fan 2 consists of a housing 4 with an essentially cylindrical or hollow cylindrical peripheral wall 6, a front end wall 8 and a rear end wall 10.
  • the housing 4 also has an inlet opening 12 in the front end wall 8 and an outlet opening 14.
  • inlet opening 12 and the outlet opening 14 are possible, which will be explained in more detail below.
  • a radial impeller 20 is arranged concentrically to the peripheral wall 6 and rotatable about an axis of rotation 16, which has a circular, for example a hub 21 with a drive shaft 22 connected or connectable rear cover disk 24 with substantially radially arranged, extending in the axial direction from the rear cover disk 24 forward, distributed over its circumference arranged radial rotor blades 26.
  • the impeller 20 also has a front cover disk 28 which is connected to the rotor blades 26 on their side axially opposite the rear cover disk 24.
  • the rotor blades 26 are designed to be curved forward, but the invention is in no way limited to this, but the impeller 20 can also have rotor blades 26 that are curved backwards or straight out.
  • the blades 26 can furthermore have a blade depth measured in the axial direction, which decreases in the radial direction from the inside to the outside (FIG. 1) or is constant (FIGS. 4 and 5).
  • the drive shaft 22 extends through the rear end wall 10 of the housing 4 and is connected to a drive motor 30 fastened to this end wall 10, which in the example shown is an external rotor motor.
  • a drive motor 30 fastened to this end wall 10, which in the example shown is an external rotor motor.
  • other types of engine are also possible.
  • the blades 26 lie with their inner ends 31 in the radial direction on the circumference of an axial inlet 32 which is circular in cross section, which has the circular inlet opening 12 of the front end wall 8 and a likewise circular inflow opening 34 of the front cover disk 28 which may be present (only in FIG 1 to 4) in the axial direction (axis 16) is substantially aligned.
  • the front cover disk 28 is consequently - due to the inflow opening 34 - in the form of an annular disk and possibly - due to the shape of the rotor blades 26 shown in FIG. 1 - slightly conical.
  • an inner spiral chamber 36 is formed in the axial direction, at least on one side of the impeller 20, which widens in cross section in the direction of rotation of the impeller (arrow 38 in FIGS. 2 and 6) and merges into the outlet opening 14.
  • the radial fan 2 according to the invention has a diameter ratio D1 / D2 in the range from 0.2 to 0.6, in particular 0.32 in the examples shown, D1 being the diameter of the inlet 32 and D2 the outer diameter of the impeller (see FIG. 2) .
  • the blades 26 of the impeller 20 end with their outer ends 39 in the radial direction at a short distance from the inner surface 40 of the housing peripheral wall 6, ie between the ends 39 of the blades 26 and the inner wall surface 40, according to the invention, there is only a minimal one, while observing tolerances customary in production radial distance available, which is just sufficient to enable a smooth rotation of the impeller 20 within the housing 4. Furthermore, it is provided according to the invention that the cover plate facing the inner spiral chamber 36, ie the front cover plate 28 in the example according to FIGS. 1 and 2 and the rear cover plate 24 in the examples according to FIGS.
  • the outlet opening 14 of the housing 4 is, according to the invention, offset in all the illustrated embodiments in the axial direction relative to the impeller 20.
  • the outlet opening 14 is designed as a blow-out nozzle 46 arranged or integrally formed in the housing peripheral wall 6, which preferably has a rectangular flow cross section.
  • the outlet connection 46 has a front wall 47, a rear wall 48 parallel to this, an upper wall 49 and a lower wall 50 parallel to this.
  • the front wall 47 is formed as an extension of the front end wall 8 of the housing 4.
  • the circumferential wall 6 of the housing 4 merges continuously into the upper wall 49 forming a tangent and into the lower wall 50 via a curvature 52.
  • the rear wall 48 forms a housing edge 54 in a transition region to the housing peripheral wall 6, it being essential to the invention that this housing edge 54 lies axially outside an axial region X (FIG. 1) defined by the axial length of the outer ends 39 of the blades 26 , which has a particularly advantageous effect on the desired noise reduction.
  • An enlargement of the inlet opening should therefore always be carried out by shifting the lower wall 50 of the blow-out connector 46 or the curvature 52 in the circumferential direction or by a lateral housing expansion in the region of the front end wall 8.
  • a further reduction in running noise is achieved according to the invention in that a web 56 is arranged along the housing edge 54 in the corner region between the rear wall 48 and the lower wall 50 of the blow-out connector 46, the web 56 viewed in the direction of rotation of the wheel 38 approximately after 1 / 4 to 1/3 of the length of the housing edge 54 begins and then increases steadily in its axially measured height, wherein in the region of the curvature 52 or the lower wall 50 of the outlet nozzle 46 it is its greatest height, in particular approximately 50-70% of that in the axial direction Direction measured length of the curvature 52 or the lower wall 50 of the blow-out spigot 46 (see in particular Fig. 3).
  • the inner spiral chamber 36 is, according to the invention, of a spiral, starting from the front housing end wall 8 in the axial direction up to the immediate vicinity of the front cover disk 28 extending separator 60 formed.
  • the separating web 60 spirally surrounds the inlet opening 12 up to an end point 66 lying on an imaginary extension of the lower wall 50 of the outlet connector 46 and goes here into an end point 66 with the Starting point 64 connecting, essentially straight web portion 60a. This results in the inner spiral chamber 36 between the cylindrical housing peripheral wall 6 and the spiral separating web 60, which increases in cross-section in the direction of rotation 38 of the impeller 20 starting from the end point 66.
  • the front cover disk 28 has an annular web 70 which surrounds the inflow opening 34 and points in the direction of the front housing end wall 8. Furthermore, the front housing end wall 8 also has an annular web 72 which surrounds the inlet opening 12 but points in the direction of the inlet 32 of the impeller 20 and forms an inlet nozzle. In the embodiment according to FIGS. 1 to 3, it is now provided according to the invention that the annular web 72 of the housing end wall 8 engages axially in the area enclosed by the annular web 70 of the cover disk 28.
  • the front cover plate 28 and the front end wall 8 likewise have the aforementioned ring webs 70 and 72 in the inlet area, but according to the invention, the ring webs 70, 72 are essentially flush with one another in the axial direction with a small spacing.
  • the circular opening 42 is now formed in the region of the rear cover disk 24, while the front cover disk 28 extends radially to the outer end 39 of the moving blades 26.
  • the inner spiral chamber 36 is formed axially between the impeller 20 and the rear housing end wall 10.
  • the rear housing end wall 10 according to the invention has a dividing web 76, the design and arrangement of which corresponds to that of the dividing web 60 already described, it extending axially from the rear end wall 10 to the vicinity of the rear cover disk 24.
  • the outlet opening 14 is designed analogously to FIGS. 1 to 3, but is arranged in the region of the housing peripheral wall 6 which axially adjoins the rear end wall 10.
  • the outlet opening 14 is designed analogously to FIGS. 1 to 3, but is arranged in the region of the housing peripheral wall 6 which axially adjoins the rear end wall 10.
  • the inlet opening 12 is, according to the invention, a circular hole opening in the front end wall 8 which preferably coincides with the inlet 32 of the impeller 20 in the axial direction educated.
  • the impeller 20 can be arranged very close to the inner surface of the front end wall 8, which advantageously leads to a further reduction in the axial overall length.
  • a front cover plate can also be dispensed with in this way. Consequently, the annular opening 42 is also formed here by the rear cover plate 24.
  • the design of the inner spiral chamber 36 is analogous to the embodiment according to FIG. 4, so that reference can be made to the relevant explanations at this point.
  • the outlet opening 14 is formed in the axial direction in the rear end wall 10.
  • the blower according to the invention can be constructed in two parts from die-cast or plastic with blades made from die-cast or steel or sheet metal for applications in the hot air or gas blower area. For other applications that involve less thermal stress, it is of course also possible to use plastic impellers.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP19870116970 1987-11-17 1987-11-17 Ventilateur radial avec volute interne Expired - Lifetime EP0316470B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE8787116970T DE3786171D1 (de) 1987-11-17 1987-11-17 Radialgeblaese mit innenspirale.
EP19870116970 EP0316470B1 (fr) 1987-11-17 1987-11-17 Ventilateur radial avec volute interne

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19870116970 EP0316470B1 (fr) 1987-11-17 1987-11-17 Ventilateur radial avec volute interne

Publications (2)

Publication Number Publication Date
EP0316470A1 true EP0316470A1 (fr) 1989-05-24
EP0316470B1 EP0316470B1 (fr) 1993-06-09

Family

ID=8197454

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870116970 Expired - Lifetime EP0316470B1 (fr) 1987-11-17 1987-11-17 Ventilateur radial avec volute interne

Country Status (2)

Country Link
EP (1) EP0316470B1 (fr)
DE (1) DE3786171D1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0450272A2 (fr) * 1990-03-28 1991-10-09 ebm Elektrobau Mulfingen GmbH & Co. Ventilateur radial avec volute interne
EP0602558A1 (fr) * 1992-12-16 1994-06-22 Alcatel SEL Aktiengesellschaft Dispositif de transport d'un médium gazeux
DE4141106C2 (de) * 1991-12-13 2001-10-04 Papst Licensing Gmbh & Co Kg Radialgebläse
EP1193399A2 (fr) * 2000-09-28 2002-04-03 PAPST-MOTOREN GmbH & Co. KG Ventilateur radial, en particulier pour respirateur
CN106321512A (zh) * 2016-10-31 2017-01-11 广东威灵电机制造有限公司 叶轮和具有其的风机
CN106402020A (zh) * 2016-10-31 2017-02-15 广东威灵电机制造有限公司 叶轮和具有其的风机

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101975192A (zh) * 2010-07-28 2011-02-16 苏州顶裕节能设备有限公司 一种叶轮前盖板

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB321847A (en) * 1928-11-29 1929-11-21 James Keith & Blackman Company Improvements in or relating to centrifugal fans
US1876871A (en) * 1930-09-29 1932-09-13 H H Franklin Mfg Company Fan construction
GB381431A (en) * 1931-01-22 1932-10-06 British Thomson Houston Co Ltd Improvements in and relating to centrifgal compressors
CH219997A (de) * 1941-02-17 1942-03-15 Ventilator A G Ventilator.
US2462518A (en) * 1946-12-14 1949-02-22 Jet Heet Inc Air compressor
US3093299A (en) * 1961-05-15 1963-06-11 Trane Co Centrifugal fan
DE2323035A1 (de) * 1973-05-08 1974-11-21 Kirchmeier Kg Verfahren zur herstellung eines kunststoffgehaeuses fuer ein geblaese oder dgl
GB2057567A (en) * 1979-08-24 1981-04-01 Borg Warner Expanding scroll diffuser for radial flow impeller

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB321847A (en) * 1928-11-29 1929-11-21 James Keith & Blackman Company Improvements in or relating to centrifugal fans
US1876871A (en) * 1930-09-29 1932-09-13 H H Franklin Mfg Company Fan construction
GB381431A (en) * 1931-01-22 1932-10-06 British Thomson Houston Co Ltd Improvements in and relating to centrifgal compressors
CH219997A (de) * 1941-02-17 1942-03-15 Ventilator A G Ventilator.
US2462518A (en) * 1946-12-14 1949-02-22 Jet Heet Inc Air compressor
US3093299A (en) * 1961-05-15 1963-06-11 Trane Co Centrifugal fan
DE2323035A1 (de) * 1973-05-08 1974-11-21 Kirchmeier Kg Verfahren zur herstellung eines kunststoffgehaeuses fuer ein geblaese oder dgl
GB2057567A (en) * 1979-08-24 1981-04-01 Borg Warner Expanding scroll diffuser for radial flow impeller

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0450272A2 (fr) * 1990-03-28 1991-10-09 ebm Elektrobau Mulfingen GmbH & Co. Ventilateur radial avec volute interne
EP0450272A3 (en) * 1990-03-28 1991-12-04 Ebm Elektrobau Mulfingen Gmbh & Co. Radial fan with an internal spiral
DE4141106C2 (de) * 1991-12-13 2001-10-04 Papst Licensing Gmbh & Co Kg Radialgebläse
DE4143663B4 (de) * 1991-12-13 2007-03-29 Papst Licensing Gmbh & Co. Kg Radialgebläse
EP0602558A1 (fr) * 1992-12-16 1994-06-22 Alcatel SEL Aktiengesellschaft Dispositif de transport d'un médium gazeux
EP1193399A2 (fr) * 2000-09-28 2002-04-03 PAPST-MOTOREN GmbH & Co. KG Ventilateur radial, en particulier pour respirateur
EP1193399A3 (fr) * 2000-09-28 2003-04-23 PAPST-MOTOREN GmbH & Co. KG Ventilateur radial, en particulier pour respirateur
AU775384B2 (en) * 2000-09-28 2004-07-29 Papst-Motoren Gmbh & Co. Kg Radial blower, in particular, for a breathing apparatus
CN106321512A (zh) * 2016-10-31 2017-01-11 广东威灵电机制造有限公司 叶轮和具有其的风机
CN106402020A (zh) * 2016-10-31 2017-02-15 广东威灵电机制造有限公司 叶轮和具有其的风机

Also Published As

Publication number Publication date
EP0316470B1 (fr) 1993-06-09
DE3786171D1 (de) 1993-07-15

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