EP3274589B1 - Axialventilator mit nachleitrad - Google Patents

Axialventilator mit nachleitrad Download PDF

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Publication number
EP3274589B1
EP3274589B1 EP16726792.1A EP16726792A EP3274589B1 EP 3274589 B1 EP3274589 B1 EP 3274589B1 EP 16726792 A EP16726792 A EP 16726792A EP 3274589 B1 EP3274589 B1 EP 3274589B1
Authority
EP
European Patent Office
Prior art keywords
hub
axial fan
vane
nachleitrad
ring
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.)
Active
Application number
EP16726792.1A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3274589A1 (de
Inventor
Daniel Gebert
Thorsten Pissarczyk
Sebastian Hoss
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.)
Ebm Papst Mulfingen GmbH and Co KG
Original Assignee
Ebm Papst Mulfingen GmbH and Co KG
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 Ebm Papst Mulfingen GmbH and Co KG filed Critical Ebm Papst Mulfingen GmbH and Co KG
Publication of EP3274589A1 publication Critical patent/EP3274589A1/de
Application granted granted Critical
Publication of EP3274589B1 publication Critical patent/EP3274589B1/de
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
    • 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
    • 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
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/64—Mounting; Assembling; Disassembling of axial pumps
    • F04D29/644—Mounting; Assembling; Disassembling of axial pumps especially adapted for elastic fluid pumps
    • F04D29/646—Mounting or removal of 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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence
    • 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
    • F05D2230/51—Building or constructing in particular ways in a modular way, e.g. using several identical or complementary parts or features
    • 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
    • F05D2260/00—Function
    • F05D2260/30—Retaining components in desired mutual position
    • F05D2260/36—Retaining components in desired mutual position by a form fit connection, e.g. by interlocking

Definitions

  • the invention relates to an axial fan with Nachleitrad.
  • an air guide said air guide arranged as a flow rectifier behind an axial fan which redirects the flow of air from the axial fan impeller in a possible axial and uniform flow.
  • the Nachleitrad at least one correspondingly shaped air guide vane.
  • the international patent application WO 2014/056657 discloses a Nachleitrad and an axial fan, in particular for evaporators in cold rooms.
  • the Nachleitrad downstream of the axial fan increases the throw of the axial fan significantly, where it turns the swirling outflow of the fan in a uniform axial flow. Throw distance is understood to mean a distance up to which a limit velocity of the air flow is maintained.
  • the Nachleitrad is made in one piece as a plastic injection molded part. It can be retrofitted as a separate component on a wall ring or on a Schutz redesignmois support grid of a fan.
  • the object of the invention consists in the provision of an axial fan with Nachleitrad, the geometry of the economically producible Nachleitrads should be optimized for different operating points.
  • a Nachleitrad an axial fan according to the invention with a hub and at least one blade is characterized in that the at least one blade is releasably operatively connected to the hub.
  • the Nachleitrad Due to the detachable connection possibility of the blade and hub, the Nachleitrad is modular. Depending on the operating point of the axial fan more or fewer blades can be used.
  • the Nachleitrad can also have a variety of blades.
  • the blade geometry is also easily replaceable.
  • different sizes of fans ie for fans with different impeller diameters, different Nachleitgan needed.
  • the modular design allows the hub of the idler wheel to be used for different fan sizes by attaching different idler vanes to the hub.
  • the hub forms a hub pot with a hub bottom, an inner circumferential wall and an outer circumferential wall, wherein the hub pot has an opening in the hub bottom.
  • the opening is located in the lowest point of the hub pot, prevents water from accumulating in the hub pot.
  • it can be optically controlled through the opening, whether the example positive connection between the at least one guide vane and the hub has been properly joined.
  • the at least one blade is operatively connected to the hub without tools.
  • the at least one blade force and / or form-fitting be operatively connected to the hub.
  • an operative connection of the at least one blade to the hub via a special geometry on the hub-side end face of the at least one blade and the corresponding counterpart of this geometry on the outer circumference of the hub is possible.
  • This special geometry can advantageously be designed as a dovetail guide.
  • the operative connection of the at least one blade to the hub is additionally securable.
  • the at least one blade can additionally be latched to the hub.
  • the hub also has corresponding guides on its outer circumference.
  • This leadership can their inside, ie their side facing the central axis of the axial fan, have a latch hook directed towards this side, which can be locked behind a corresponding edge of the hub.
  • the guide can have a slot to increase the flexibility, whereby the required joining force is minimized.
  • the hub on the inner circumferential wall has a central axis, i. directed towards the axis of rotation of the impeller towards stop.
  • An inventive axial fan has an impeller driven by an electric motor, a diffuser, a Nachleitrad, a support structure and at least one circumferential ring, wherein the support structure and the at least one circumferential ring are arranged in the flow direction behind the impeller and wherein the Nachleitrad on the at least one circumferential ring is fastened.
  • the axial fan can be installed via a wall ring in a corresponding opening in a wall.
  • the support structure then establishes the connection between the wall ring and the electric motor and holds the electric motor and thus the impeller in the wall ring.
  • one or more circumferential concentric rings or at least one spiral-shaped ring may be attached, over which a contact protection in the form of a protective grid for the impeller and / or electrical parts of the motor can be given.
  • a contact protection in the form of a protective grid for the impeller and / or electrical parts of the motor can be given.
  • the contact protection if necessary, be ensured by a separate protective device.
  • a Nachleitrad increases the peak efficiency of an axial fan in the high pressure range of the fan characteristic. At low back pressures and high volume flows, however, the efficiency of a fan with Vietnameseleitrad is lower.
  • the Nachleitrad invention is optionally integrated, if it makes sense for the particular application. On the existing components, no change is necessary to attach the Nachleitrad can.
  • the at least one blade has a connecting element in an area facing away from the hub.
  • the Connecting element is the Nachleitrad on the support structure and / or the protective grid fastened.
  • the support structure and / or the protective grid contributes to the stability of the Nachleitrads.
  • the Nachleitrad is tool-less fastened to the at least one circumferential ring.
  • the Nachleitrad is particularly easy to attach to the axial fan when the operating point requires, and also removable, if in another operating point, the Nachleitrad is not required.
  • the Nachleitrad can be fastened by means of the connecting element positively and / or non-positively on the at least one circumferential ring. Such an attachment is possible, for example, via an elastic-plastic deformation of the connecting element. In this case, the connecting element is partially elastic, but partially also plastically deformed.
  • the support structure on its side facing the axis of rotation of the impeller on a flange, wherein the Nachleitrad force and / or positively operatively connected to the flange.
  • the Nachleitrad is operatively connected via a latching hook with the flange.
  • the stop of the hub cooperates with the flange ring of the support structure and the latching hook in the installed state such that the axial position of the Nachleitrads is fixed.
  • the stop can be designed like a labyrinth. As a result, the stop reduces the leakage flow in the connection area.
  • the stop is interrupted only in the field of locking hooks for manufacturing reasons.
  • a gap is formed in the circumferential direction between the diffuser and the at least one blade.
  • the at least one blade can also touch the diffuser with its end face pointing in the circumferential direction.
  • Fig. 1 shows a Nachleitrad 20 in a three-dimensional representation.
  • the Nachleitrad 20 has a hub 5 and a plurality of blades 4.
  • the hub 5 has at its inner periphery a circumferential stop 14 and distributed over the circumference latching hooks 12.
  • the blades 4 have on their the central axis 2a of the hub facing end guides 4a, with which they are inserted on the outer circumference of the hub 5 in there existing guides 5e (not visible in this figure).
  • the blades 4 can be connected to the hub 5 without tools in this way.
  • the blades 4 each have a connecting element 10 in a region on their side facing away from the central axis 2a of the hub.
  • Fig. 2 shows a section of a Nachleitrads in a section.
  • a blade 4 is inserted with its guide 4a in the corresponding counter-geometry, the guide 5e of the hub 5.
  • the guides 4a and 5e are designed as a dovetail guide.
  • the hub 5 has a hub bottom 5b, an inner circumferential wall 5c, and an outer circumferential wall 5d, and forms a hub cup 5a.
  • the guide 5e is located in the outer circumferential wall 5d.
  • the guide 4a of the blade 4 has a slot 4b open toward the hub bottom 5b. Through this slot 4b, the flexibility of the guide 4a is increased.
  • the guide 4a has at its the hub bottom 5b end facing a latching hooks 9.
  • This latching hook 9 snaps at full insertion of the guide 4a of the blade 4 in the guide 5e of the hub behind the wall of the guide 5e and thus secures the blade 4 in the hub 5.
  • the inner circumferential wall 5c has a directed towards the central axis 2a stop 14th on.
  • Fig. 3 shows a section of an axial fan according to the invention with mounted Nachleitrad 20 in a sectional view.
  • the axial fan has an impeller 2 drivable by an electric motor, a diffuser 3, a Nachleitrad 20, a support structure 11b and at least one circumferential ring 11a1, wherein the support structure 11b and the at least one circumferential ring 11a1 are arranged downstream of the impeller and wherein the Nachleitrad 20 can be fastened to the at least one circumferential ring 11a1a.
  • the axial fan can be installed via the wall ring 1 in a corresponding opening in a wall.
  • the support structure 11b then establishes the connection between the wall ring 1 and the electric motor and holds the electric motor and thus the impeller 2 in the wall ring 1.
  • On the support structure 11b one or more circumferential concentric rings 11a attached, about which a contact protection in the form of a protective grid given for the impeller 2 and / or electrical parts of the engine.
  • the Nachleitrad 20 is optionally integrated, ie it can be attached to the axial fan, if it makes sense for the particular application. For another operating point, the Nachleitrad 20 but also easily be removed. In particular, the Nachleitrad 20 can be attached without tools and removed again. At the existing components no change is necessary to fasten the Nachleitrad 20 can. Via the connecting element 10, the Nachleitrad 20 can be fastened to the support structure 11b via the at least one circumferential ring 11a1. The support structure 11b contributes to the stability of Nachleitrads 20 at.
  • the Nachleitrad 20 is by means of the connecting element 10th positively and non-positively attachable to the at least one circumferential ring 11a1 by the fork-shaped fastening element 10 is attached to the at least one circumferential ring 11a1.
  • the connecting element 10 is partially elastic, but partially also plastically deformed.
  • Fig. 4 shows a further section of an axial fan according to the invention with mounted Nachleitrad 20 in a sectional view.
  • the support structure 11b has on its axis of rotation 2a of the impeller 2 side facing a flange 11c, wherein the Nachleitrad 20 is operatively connected to the flange via a latching hook 12. By this connection, the structural strength of the Nachleitrads 20 is additionally increased.
  • the hub 5 is pressed onto the support structure 11b up to the stop 14 of the inner circumferential wall 5c, the inner peripheral wall 5c snapping onto the flange ring 11c of the support structure 11b.
  • the stop 14 is designed in a labyrinth-like manner, whereby the leakage flow in the connection region is reduced.
  • the stop 14 is interrupted only in the region of the latching hook 12 for manufacturing reasons.
  • a gap 13 is formed in the circumferential direction.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP16726792.1A 2015-03-25 2016-03-22 Axialventilator mit nachleitrad Active EP3274589B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015205424.1A DE102015205424A1 (de) 2015-03-25 2015-03-25 Nachleitrad
PCT/EP2016/056278 WO2016150975A1 (de) 2015-03-25 2016-03-22 Nachleitrad

Publications (2)

Publication Number Publication Date
EP3274589A1 EP3274589A1 (de) 2018-01-31
EP3274589B1 true EP3274589B1 (de) 2019-01-30

Family

ID=54922512

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16726792.1A Active EP3274589B1 (de) 2015-03-25 2016-03-22 Axialventilator mit nachleitrad

Country Status (8)

Country Link
US (1) US10760590B2 (zh)
EP (1) EP3274589B1 (zh)
CN (1) CN204900331U (zh)
DE (1) DE102015205424A1 (zh)
DK (1) DK3274589T3 (zh)
HU (1) HUE043992T2 (zh)
TR (1) TR201906248T4 (zh)
WO (1) WO2016150975A1 (zh)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109139551A (zh) * 2018-09-20 2019-01-04 江门市桑尼光电科技有限公司 排气风叶及具有其的排气扇
US11555508B2 (en) 2019-12-10 2023-01-17 Regal Beloit America, Inc. Fan shroud for an electric motor assembly
USD952830S1 (en) 2019-12-10 2022-05-24 Regal Beloit America, Inc. Fan shroud
US11859634B2 (en) 2019-12-10 2024-01-02 Regal Beloit America, Inc. Fan hub configuration for an electric motor assembly
USD938009S1 (en) 2019-12-10 2021-12-07 Regal Beloit America, Inc. Fan hub
USD938010S1 (en) 2019-12-10 2021-12-07 Regal Beloit America, Inc. Fan hub
USD938011S1 (en) 2019-12-10 2021-12-07 Regal Beloit America, Inc. Fan blade
US11371517B2 (en) 2019-12-10 2022-06-28 Regal Beloit America, Inc. Hub inlet surface for an electric motor assembly

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Also Published As

Publication number Publication date
WO2016150975A1 (de) 2016-09-29
US20180216630A1 (en) 2018-08-02
DK3274589T3 (en) 2019-04-15
US10760590B2 (en) 2020-09-01
TR201906248T4 (tr) 2019-05-21
HUE043992T2 (hu) 2019-09-30
DE102015205424A1 (de) 2016-09-29
EP3274589A1 (de) 2018-01-31
CN204900331U (zh) 2015-12-23

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