EP3009682A1 - Ventilateur axial avec diffuseur interne et externe - Google Patents

Ventilateur axial avec diffuseur interne et externe Download PDF

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Publication number
EP3009682A1
EP3009682A1 EP15189055.5A EP15189055A EP3009682A1 EP 3009682 A1 EP3009682 A1 EP 3009682A1 EP 15189055 A EP15189055 A EP 15189055A EP 3009682 A1 EP3009682 A1 EP 3009682A1
Authority
EP
European Patent Office
Prior art keywords
fan
diffuser
axial
nozzle
drive motor
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
EP15189055.5A
Other languages
German (de)
English (en)
Other versions
EP3009682B1 (fr
Inventor
Frank Dipl.-Ing. Müller
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.)
Thermofin GmbH
Original Assignee
Thermofin 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 Thermofin GmbH filed Critical Thermofin GmbH
Publication of EP3009682A1 publication Critical patent/EP3009682A1/fr
Application granted granted Critical
Publication of EP3009682B1 publication Critical patent/EP3009682B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F04D19/00—Axial-flow pumps
    • F04D19/002—Axial flow fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
    • 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
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/54—Fluid-guiding means, e.g. diffusers
    • F04D29/541—Specially adapted for elastic fluid pumps
    • F04D29/542—Bladed diffusers
    • 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
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/54—Fluid-guiding means, e.g. diffusers
    • F04D29/541—Specially adapted for elastic fluid pumps
    • F04D29/545—Ducts
    • 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
    • F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
    • F04D29/701—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps
    • F04D29/703—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps specially for fans, e.g. fan guards
    • 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
    • F05D2230/50—Building or constructing in particular ways
    • F05D2230/54—Building or constructing in particular ways by sheet metal manufacturing

Definitions

  • the invention relates to an axial fan, which is equipped with an outer and inner diffuser.
  • Axial fans are turbomachines whose impeller axis of rotation runs parallel or axially to the air flow. Axial fans are combined with diffusers according to the prior art for improving the efficiency and used for a variety of tasks. Fields of application of axial fans generally consist in the combination of fans for air in connection with heat exchangers. For example, axial fans are used for operating recoolers, condensers, evaporators or as air coolers.
  • a diffuser is understood to mean a component which, for example, slows gas flows and thus increases the gas pressure. Diffusers are used to convert kinetic energy into pressure energy, which requires the flow to be retarded.
  • a gas evacuation diffuser for a gas turbine which includes fixed baffles located near the corners of a square one Cross-section of the diffuser are arranged.
  • the DE 20 2010 016 820 U1 discloses a diffuser for a fan and a fan assembly with such a diffuser.
  • a special feature consists in the fact that the cross section of the outer diffuser along the main flow direction of a circular cross section at the inlet opening merges into a non-circular cross section at the outlet opening.
  • the object of the invention is now to provide an axial fan with an outer and an inner diffuser available, which consists entirely of temperature-resistant and mechanically strong materials.
  • an axial fan which has as essential components a drive motor for driving fan blades and a circular cylindrical fan nozzle and an adjoining outer diffuser.
  • the fan nozzle and the outer diffuser are formed in one piece and from sheet metal.
  • a support unit for the drive motor is provided, which simultaneously forms an inner diffuser cylindrical.
  • the inner diffuser extends in the axial direction from the fan blades to the axial end of the outer diffuser.
  • the fan nozzle and the outer diffuser are made of sheet metal and one part. The part is first deep-drawn and then rolled.
  • a sheet in the context of the invention is meant a product made of metal, in particular galvanized steel sheet for the production of said components is used.
  • the support unit is preferably formed of support arms, a cylindrical tube as réelleendiffusor and and a support ring.
  • the drive motor is advantageously attached to the support ring and executed at least partially taken up by the inner diffuser, whereby a particularly length-saving design is possible.
  • the components of the drive motor are arranged protected in the inner diffuser.
  • two openings are provided on the inner diffuser, which are designed to conduct a cooling air flow via the electronics of the drive motor.
  • the support unit is preferably formed by four support arms, which are connected at the axial end of the outer diffuser across the flow cross-section with the end of the outer diffuser.
  • the Berstoffstoffgitter is arranged on the support arms.
  • an air nozzle is provided on the support unit.
  • an axial fan with drive motor, fan blades and guide vanes wherein the fan blades and the Nachleitschaufeln are arranged in a circular cylindrical fan nozzle in the flow direction one behind the other.
  • An outer diffuser is arranged after the fan nozzle, wherein the fan nozzle is designed in two parts in the flow direction. A part of the fan nozzle encloses the fan blades and a part of the fan nozzle has the guide vanes.
  • the part of the fan nozzle with the guide vanes and the outer diffuser are made in one piece, wherein the inner diffuser is formed via the guide vanes connected to the fan nozzle.
  • the inner diffuser is cylindrical and extends in the axial direction of the fan blades to the axial end of the outer diffuser, wherein the fan nozzle and the outer diffuser are made of sheet metal.
  • the metal jacket of the fan nozzle and outdoor fan is made in two parts.
  • a first part includes the fan nozzle including the area in which the fan blades are arranged.
  • this sheath is in turn designed as a part which is made connectable to the first part.
  • the inner diffuser is designed in cross section as a dodecagon.
  • the dodecagon has twelve corners, which are connected by straight sections.
  • the axial fan is formed in that twelve guide vanes are provided, which are preferably arranged connecting the inner diffuser with the outer diffuser in the region of the fan nozzle.
  • the guide vanes are formed as angled plates and arranged tangentially offset between the inner diffuser and outer diffuser.
  • the outer diffuser is preferably formed in the axial direction, the flow direction, first of all from a transition region and then from a diffuser region having a different geometry.
  • transition area is one fifth of the total length of the outer diffuser.
  • a particularly advantageous embodiment results from the fact that the drive motor is mounted with a motor mount on the edge of the fan nozzle flow inlet side and completely integrated in the sheet metal housing.
  • a Berckentikgitter arranged, which covers the entire flow cross-section. This is to prevent the touching or reaching of objects into the effective range of the rapidly rotating fan blades.
  • the increase in the efficiency of the overall fan-diffuser system wherein not only the fan in the narrower sense is considered by an optimized blade geometry, but also the subsequent outflow through the diffuser.
  • the use of the diffuser effect makes it possible to gain energy in comparison to other systems, since the dynamic pressure of the air flow is converted by the increase in diameter into static pressure, which is reflected in the lowering of the outflow speed.
  • the guide vanes additionally optimize the system by directing the air swirl.
  • the individual components are made of sheet metal, which can also be implemented applications that can not be realized in terms of the size and the resilience of systems with plastic components.
  • the use of the components in sheet metal allows the use of the axial fan at very high, but also at very low outside temperatures and in locations with adverse weather conditions. Further advantages arise, for example, in terms of the possible coloring and the material resistance through the use of sheet metal instead of plastics.
  • the design of the axial fan with the two-piece fan nozzle is also particularly advantageous because very large diameter can be performed as a sheet metal construction by the two-part design.
  • An additional advantage is that a combination of an axial compressor with a corresponding diameter of the fan nozzle with the part of the guide device with the diffuser and the safety guard is possible as an optional retrofit unit. The subsequent installation can be done on the preassembled fan nozzle. This considerably simplifies the handling and the transport possibilities for axial fans with guide device and diffuser.
  • Increasing the efficiency of the fans is achieved by lowering the energy consumption while maintaining the volume flow and reducing the sound values.
  • the design leads to axial fans with combined or integrated diffusers also to a lower height.
  • Fig. 1a is a perspective sectional view of an axial fan 1 is shown.
  • the illustrated advantageous embodiment of the axial fan 1 is composed of a one-piece circular-cylindrical fan nozzle 2 and an outer diffuser 3 adjoining it in the axial direction.
  • the outer diffuser 3 is covered at its outer boundary in the axial direction over the entire cross section of a Berstoffstoffgitter 9.
  • the drive motor 5 is supported by a support unit 4 via support arms 14 at the end of the outer diffuser 3.
  • the drive motor 5 drives the fan blades 6 in the fan nozzle 2.
  • An air flow with a flow direction 10 is generated by the fan blades 6, which moves in the axial direction from the fan nozzle 2 through the outer diffuser 3.
  • an inner diffuser 8 is arranged, which is designed in cross section as a circular cylindrical tube.
  • the support unit 4 carries the drive motor 5 and this is supported without further attachment only by the one-piece outer diffuser 3 and the fan nozzle 2.
  • the drive motor 5 is on the Tragarmkonstrutation the Carrying unit 4 connected to the end of the outer diffuser 3 and has no additional support in the region of the fan nozzle 2 or in the axial direction from below and thus appears free-floating.
  • An advantage of this embodiment is also that the support unit 4 as Tragarmkonstrument to the motor mount and the Bermmschgitter 9 sit very far away from the fan blades 6 and thus their influence and interference on the fan blades 6 is minimal.
  • Optional guide vanes are integrated, which are then arranged after the fan blades 6 in the air flow direction.
  • Fig. 1b the support unit 4 of an axial fan is shown in a perspective enlarged view without the fan nozzle and the outer diffuser.
  • the drive motor 5 and the fan blades 6 are also shown in this view.
  • the support unit 4 consists essentially of the support arms 14, which are arranged at the periphery and at the upper end of a cylindrical tube and extending radially outwardly from this tube.
  • the upper end of the cylindrical tube is closed by a cap 17, which is designed to be removable for maintenance or assembly purposes. This makes it possible, for example, to allow access to the electronics of the drive motor 5 without having to dismantle the safety guard.
  • a support ring 15 is arranged and welded to the cylindrical tube, which supports the drive motor 5.
  • the support ring 15 is welded to the tube and has receptacles for the drive motor 5.
  • the support ring 15 is designed, for example, flange and the drive motor 5 is connected via screw to the support ring 15. A part of the drive motor 5 is received by the cylindrical tube, so that a very compact design is possible.
  • the cylindrical tube is positioned downstream of the fan blades 6 so that the cylindrical tube acts as an internal diffuser 8.
  • An air pipe 16 is disposed on the inner diffuser 8.
  • Fig. 2 is an embodiment of an outer diffuser 3 and a fan nozzle 2 in one-piece design shown in side view.
  • the outer diffuser 3 is listed here in the axial direction at the end of the fan nozzle 2, initially in a transition region 12 and then expanded in the diffuser region 11 with different bending or radii of curvature in the radial direction.
  • the ratio of the length of the transition region 12 to the diffuser region 11 in the axial direction is one in four, so that four fifths of the outer diffuser 3 are formed as a diffuser region 11 and a fifth as a transition region 12.
  • a region of the fan nozzle 2 and the outer diffuser 3 is shown in longitudinal section, whereby the inner diffuser 8 is visible. Furthermore, the area of the fan nozzle 2 with the guide vanes 7 is shown, which is arranged towards the outer diffuser 3.
  • the representation according to Fig. 3 thus, the second part of the two-part embodiment of the fan nozzle 2 and outer diffuser 3 with the transition region 12 as shown in FIG Fig. 1a and Fig. 1 b.
  • FIG. 5 is a plan view shown axially and opposite to the flow direction and a perspective view of an axial fan 1, wherein in the plan view according to Fig. 4 the outer diffuser 3 appears as a circular ring, whereas the circular cylindrical fan nozzle 2 is shown as the inner boundary line of this circular ring.
  • the inner diffuser 8 is designed as a twelve-corner, as a so-called dodecagon, wherein on each of its straight sides a Nachleitschaufel 7 is designed as a sheet metal construction of angle plates.
  • the Nachleitschaufeln 7 are not radially but tangentially offset from the axis of rotation of the fan blades not shown here.
  • sixteen guide vanes 7 are optionally used.
  • the axial fan 1 is completed in the illustrations according to FIG 4 and FIG. 5 by the Berckentikgitter 9, which is an intervention protection and also a destruction protection for the moving fan blades, not shown forms.
  • Fig. 6 shows an application of an axial fan 1 in a positioning to V-shaped heat exchangers 13, wherein the air is sucked through the axial fan 1 through the heat exchanger 13 from below and conveyed out in the flow direction 10 from the axial fan 1.
  • Fig. 7a is a sectional view of an axial fan 1 is shown.
  • the illustrated advantageous embodiment of the axial fan 1 is constructed from a circular cylindrical fan nozzle 2 and from an axial extension or extension of the circular cylindrical fan nozzle 2 with Nachleitschaufeln 7 and an adjoining outer diffuser 3.
  • the outer diffuser 3 is covered at its outer boundary in the axial direction over the entire cross section of a Berntontikgitter 9.
  • the drive motor 5 is supported by a motor mount 4 on the suction side of the axial fan 1, the motor mount 4 being supported on the fan nozzle 2 made of sheet metal.
  • the drive motor 5 drives the fan blades 6 in the fan nozzle 2.
  • An air flow with a flow direction 10 is generated by the fan blades 6, which moves in the axial direction from the fan nozzle 2 via the guide vanes 7 and through the outer diffuser 3.
  • an inner diffuser 8 is arranged, which is designed in cross section as a twelve-corner.
  • the peculiarity of the illustrated embodiment is that fan nozzle and diffuser are composed of two parts, resulting in advantages in terms of mounting and handling advantages.
  • the drive motor 5 is completely recorded by the inner diffuser 8 executed.
  • Fig. 7b is the axial fan 1 according to Fig. 7a shown in section in a perspective view.
  • the three fan blades 6 as well as some of the radial alignment staggered guide vanes 7 are shown.
  • the outer diffuser 3 limited at its upper Edge of Berstoffstoffgitter 9.
  • the guide vanes 7 are connected on one side with the inner diffuser 8 and on the other side with the fan nozzle 2.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP15189055.5A 2014-10-13 2015-10-09 Ventilateur axial avec diffuseur interne et externe Active EP3009682B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102014114798.7A DE102014114798A1 (de) 2014-10-13 2014-10-13 Axialventilator mit Außen- und Innendiffusor

Publications (2)

Publication Number Publication Date
EP3009682A1 true EP3009682A1 (fr) 2016-04-20
EP3009682B1 EP3009682B1 (fr) 2023-08-02

Family

ID=54324818

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15189055.5A Active EP3009682B1 (fr) 2014-10-13 2015-10-09 Ventilateur axial avec diffuseur interne et externe

Country Status (2)

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EP (1) EP3009682B1 (fr)
DE (1) DE102014114798A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106839535A (zh) * 2017-01-26 2017-06-13 上海宝丰机械制造有限公司 扩压管及包括其的蒸发式冷凝器
WO2018175359A1 (fr) * 2017-03-20 2018-09-27 Shop Vac Corporation Ventilateur axial à carter formé par des pièces rattachables et comprenant des nervures de guidage d'air et une rampe interne
CN115342078A (zh) * 2022-10-20 2022-11-15 杭州顿力电器有限公司 一种带模块扩压结构的高效离心风机
US11781563B1 (en) 2022-05-20 2023-10-10 Hudson Products Corporation Air-cooled heat exchanger with X-brace drive

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018004605B4 (de) * 2018-06-11 2022-09-01 Felix Müller Lüfteraufsatz zur Optimierung der Mischungsventilation

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1940790A (en) 1930-10-18 1933-12-26 Walter S Diehl Fluid conducting passage
GB584657A (en) * 1945-01-19 1947-01-20 Michael Thaddius Adamtchik Improvements in or relating to axial flow screw fans and the like
US3346174A (en) * 1966-07-05 1967-10-10 Trane Co Compact axial flow fan
EP0581978A1 (fr) 1992-08-03 1994-02-09 Asea Brown Boveri Ag Diffuseur à zones multiples pour turbomachine
EP0708249A1 (fr) * 1994-10-11 1996-04-24 Clima Neu S.A. Ventilateur hélicoîde à virole
DE69302989T2 (de) 1992-10-26 1996-10-31 Europ Gas Turbines Sa Gasabfuhrdiffusor für eine Gas Turbine
DE102007005722A1 (de) * 2007-01-31 2008-08-07 Hans Joachim Leithner Laufrad für einen Axialventilator
EP2418388A2 (fr) * 2010-08-12 2012-02-15 Ziehl-Abegg AG Ventilateur
DE202010016820U1 (de) 2010-12-21 2012-03-26 Ebm-Papst Mulfingen Gmbh & Co. Kg Diffusor für einen Ventilator sowie Ventilatoranordnung mit einem derartigen Diffusor

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2397171A (en) * 1943-12-06 1946-03-26 Del Conveyor & Mfg Company Fan and motor mounting
US2435645A (en) * 1945-08-23 1948-02-10 Westinghouse Electric Corp Axial flow fan
JPH0311114A (ja) * 1989-06-09 1991-01-18 Nippondenso Co Ltd 熱交換器に付設されるファン装置
US8622695B2 (en) * 2009-08-12 2014-01-07 Xcelaero Corporation Flow trim for vane-axial fans
DE202011004708U1 (de) * 2010-08-12 2011-07-14 Ziehl-Abegg Ag Ventilator

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1940790A (en) 1930-10-18 1933-12-26 Walter S Diehl Fluid conducting passage
GB584657A (en) * 1945-01-19 1947-01-20 Michael Thaddius Adamtchik Improvements in or relating to axial flow screw fans and the like
US3346174A (en) * 1966-07-05 1967-10-10 Trane Co Compact axial flow fan
EP0581978A1 (fr) 1992-08-03 1994-02-09 Asea Brown Boveri Ag Diffuseur à zones multiples pour turbomachine
DE69302989T2 (de) 1992-10-26 1996-10-31 Europ Gas Turbines Sa Gasabfuhrdiffusor für eine Gas Turbine
EP0708249A1 (fr) * 1994-10-11 1996-04-24 Clima Neu S.A. Ventilateur hélicoîde à virole
DE102007005722A1 (de) * 2007-01-31 2008-08-07 Hans Joachim Leithner Laufrad für einen Axialventilator
EP2418388A2 (fr) * 2010-08-12 2012-02-15 Ziehl-Abegg AG Ventilateur
DE202010016820U1 (de) 2010-12-21 2012-03-26 Ebm-Papst Mulfingen Gmbh & Co. Kg Diffusor für einen Ventilator sowie Ventilatoranordnung mit einem derartigen Diffusor

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106839535A (zh) * 2017-01-26 2017-06-13 上海宝丰机械制造有限公司 扩压管及包括其的蒸发式冷凝器
WO2018175359A1 (fr) * 2017-03-20 2018-09-27 Shop Vac Corporation Ventilateur axial à carter formé par des pièces rattachables et comprenant des nervures de guidage d'air et une rampe interne
US11359643B2 (en) 2017-03-20 2022-06-14 Shop Vac Corporation Fan having housing formed by connectable pieces and including air guide ribs and an internal ramp
US11781563B1 (en) 2022-05-20 2023-10-10 Hudson Products Corporation Air-cooled heat exchanger with X-brace drive
CN115342078A (zh) * 2022-10-20 2022-11-15 杭州顿力电器有限公司 一种带模块扩压结构的高效离心风机

Also Published As

Publication number Publication date
DE102014114798A1 (de) 2016-04-14
EP3009682B1 (fr) 2023-08-02

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