EP3308030A1 - Flow-conducting grille for arranging on a fan - Google Patents
Flow-conducting grille for arranging on a fanInfo
- Publication number
- EP3308030A1 EP3308030A1 EP16750737.5A EP16750737A EP3308030A1 EP 3308030 A1 EP3308030 A1 EP 3308030A1 EP 16750737 A EP16750737 A EP 16750737A EP 3308030 A1 EP3308030 A1 EP 3308030A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- radial
- strömungsleitgitter
- webs
- angle
- strömungsleitgitters
- 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
- 230000002093 peripheral effect Effects 0.000 claims description 11
- 230000001404 mediated effect Effects 0.000 claims 1
- 238000011161 development Methods 0.000 description 6
- 230000018109 developmental process Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- OOKDYUQHMDBHMB-UHFFFAOYSA-N 3,6-dichloro-2-methoxybenzoic acid;2-(2,4-dichlorophenoxy)acetic acid;n-methylmethanamine Chemical compound CNC.CNC.COC1=C(Cl)C=CC(Cl)=C1C(O)=O.OC(=O)COC1=CC=C(Cl)C=C1Cl OOKDYUQHMDBHMB-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 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
- F04D29/70—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
- 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
- F04D29/4213—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps suction ports
-
- 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
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. 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
- F04D29/542—Bladed diffusers
- F04D29/544—Blade shapes
-
- 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
- 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
- F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
-
- 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
- F04D29/666—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by means of rotor construction or layout, e.g. unequal distribution of blades or vanes
Definitions
- the invention relates to a Strömungsleitgitter for arrangement on the suction side of a fan, with a lattice web structure comprising circumferentially spaced radial webs and radially spaced coaxial peripheral webs.
- a Strömungsleitgitter for arrangement on the suction side of a fan, with a lattice web structure comprising circumferentially spaced radial webs and radially spaced coaxial peripheral webs.
- Turning tones are narrow-band, tonal sounds, also known as propeller sounds.
- the turning tones occur in particular in an asymmetric intake situation, which is present, for example, at differently close device walls on the suction side. Then strong air eddies can form, which connect at the narrowest points to the so-called vortex braids and meet directly on the rotating impeller blades.
- the known Strömungsleitgitter have a grid structure with straight radially outwardly extending radial webs and constant inclined circumferential ridges. This structure is not optimal in certain installation situations with regard to the resulting rotational tones.
- the invention has for its object to provide a Strömungsleitgitter that reduces rotational sounds in fans whose air inflow takes place in particular from the radial direction. This object is achieved by the feature combination according to claim 1.
- a Strömungsleitgitter for arrangement on the suction side of a fan with a grid web structure, the circumferentially spaced radial webs and radially spaced coaxial circumferential webs comprises.
- the radial webs of at least one quadrant of the Strömungsleitgitters are each seen over their radial extent in the circumferential direction to a predetermined, extending from a central axis of the Strömungsleitgitters extending radial plane.
- the radial plane to which the radial webs curve in the circumferential direction is thereby aligned or mounted in such a way that it points in a main inflow direction of the intake air. It is therefore also defined as a zero-degree radial plane delimiting a first quadrant.
- the curvature of the radial webs and in particular their respective curved radial end provide a flow-changing Anströmsituation that reduces hymns of the downstream fan.
- the inflow is not constant due to the special geometry seen over the circumference and is not directed to the center of the axis of the Strömungsleitgitters.
- the radial webs of two adjacent quadrants of the Strömungsleitgitters are each curved over its radial extent in the circumferential direction to the predetermined radial plane towards curved.
- it concerns the two adjacent quadrants of the Strömungsleitgitters, which point in the Hauptzuströmides the sucked air.
- the radial webs of all four quadrants of the Strömungsleitgitters are each curved over their radial extent in the circumferential direction to the predetermined radial plane towards curved. This is particularly advantageous if, due to the installation, there is only one radial main inflow direction, which is then set so that it runs along the extent of the zero-degree radial plane.
- the radial webs arc curved in the circumferential direction, wherein the angle of curvature is variable over its radial extent.
- the curvature of the radial webs in a near the central axis of the Strömungsleitgitters area is less than in their respective radial end.
- the radial webs determine an angle a, which is formed from a respective straight line extending from a central axis of the Strömungsleitgitters to the respective radial end of the respective radial web and an imaginary curvature-free extension of the respective radial web beyond its respective radial end.
- the angle ⁇ varies with different radial webs. This means that the radial webs at their respective radial end have a different curvature and in each case depending on their shape in dependence. are adapted from the inflow direction.
- the adaptation of the curvature of the individual radial webs takes place in the circumferential direction, wherein an angle p is determined in the circumferential direction starting from the zero-degree radial plane.
- the zero-degree radial plane preferably runs in the main inflow direction.
- a (p) 90xr1-r1 p for 45 ° ⁇ p ⁇ 90 °
- a (p) 180 * r1-r1 p for 135 ° ⁇ p ⁇ 180 °,
- r1 is in a range of 0.6 to 1.2, more preferably in a range of 0.8 to 1.0.
- the peripheral webs have a defined form in a development of the invention.
- the peripheral webs are formed in a favorable embodiment along its axial extension convex and at least partially pointing in the direction of the central axis of the Strömungsleitgitters.
- the axial extent is defined as the extent along the central axis of the Strömungsleitgit- ters.
- the Strömungsleitgitter invention is further provided in a development that at least one of the circumferential webs has an average axial extent, which is opposite to the center axis of the Strömungsleitgitters is inclined at an angle ß.
- the averaged axial extent is formed from an axial starting point and an axial end point of the respective circumferential ridge and thus takes into account a possible convex shape of the circumferential ridges.
- the inclination angle ⁇ changes over its course in the circumferential direction with at least one, preferably all circumferential webs. This leads to a further adaptation of the geometry of the Strömungsleitgitters depending on the inflow direction, as already done by the Radial alstege.
- the flow guide grille is adjusted for its radial and circumferential ridges to produce a partially symmetric or asymmetric geometry.
- the two adjoining quadrants of the flow guide lattice are mirror-symmetrical with respect to the zero-degree radial plane.
- the two quadrants impinged by the main flow have the same mirrored shape.
- the two quadrants facing away from the main flow are designed differently with regard to their radial webs and circumferential webs, so that the flow guide web overall has an asymmetrical shape.
- two adjoining quadrants of the flow-guiding lattice are formed mirror-symmetrically with respect to a radial plane which is perpendicular to the zero-degree radial plane. That is, the two quadrants, which each impinge on the flow, are mirror-symmetrical to each other.
- Fig. 1 is a plan view of a Strömungsleitgitter
- FIG. 2a is a side sectional view A-A of Strömungsleitgitters of FIG.
- 2b is a side sectional view B-B of the Strömungsleitgitters of FIG.
- Fig. 3 is a diagram showing the development of the angle ⁇ of the individual radial webs in the circumferential direction
- 5 is a graph with preferred corridor of the values of the mean value of the angle ⁇ over the circumference and the fluctuation value b.
- FIGS. 1-2 show an exemplary embodiment of a flow guide grid 1 according to the invention with a main inflow direction in different views.
- Like reference numerals designate like parts throughout the views.
- Figure 1 shows a plan view of the Strömungsleitgitters 1 with grid web structure, which is designed for arrangement on the suction side of a fan. At the Dialen outer edge are provided for attachment to the fan three tabs 5.
- the grid web structure is formed by circumferentially
- the radial webs 2 are of different lengths and extend from their radial edge 4 differently far in the direction of the central axis of the Strömungsleitgitters 1 each to a peripheral ridge 3. This causes the mesh size in the Radial outer region is less than in the central region around the central axis.
- the main inflow direction is represented by the arrow P and extends along the zero-degree radial plane NR extending radially outward from the central axis.
- the Strömungsleitgitter 1 has a geometry optimized for this Hauptzuströmraum on, for this purpose, the radial webs 2 and 3 circumferential ribs in the four quadrants 1 Q-4Q are adapted in terms of their shape and extent. In the first and fourth quadrants 1 Q, 4Q and in the second and third quadrants 2Q, 3Q, the Strömungsleitgitter each other is mirror-symmetrical.
- the radial webs 2 of the Strömungsleitgitters 1 are curved in all four quadrants 1 Q-4Q each seen over their radial extent in the circumferential direction to the zero degree radial plane NR out.
- the arcuate curvature of the individual radial webs 2 varies depending on their position in the circumferential direction (angle p) within the individual quadrant. The curvature is initially stronger within a quadrant seen in the circumferential direction and then decreases again.
- the individual radial webs 2 each determine a varying angle a, wherein a is formed on each radial web 2 from each of the central axis of the Strömungsleitgitters 1 to the respective radial end 4 of the respective radial web 2 extending straight line G and the imaginary curvature-free Extension V of the respective radial web 2 beyond its respective radial end 4 addition.
- the coaxial circumferential webs 3 are convex along their axial extension and pointing in the direction of the central axis of the Strömungsleitgitters 1, as can be seen well in the lateral sectional views A-A and B-B according to Figures 2a and 2b.
- the inclination of the circumferential webs 3 with respect to the central axis of the Strömungsleitgitters 1 changes over its course in the circumferential direction.
- the inclination is sketched for a circumferential ridge 3 at the intersection point according to FIG. 2b as an angle ⁇ .
- the radially outer peripheral ribs 3 are more inclined than the near the central axis extending.
- ⁇ a + b * cos (p), where a the respective mean value of the angle ß over the circumference of each considered circumferential webs 3, b the specified fluctuation value and p corresponds to the angle in the circumferential direction from the zero degree radial plane (NR).
- Figure 4 shows by way of example the course of the inclination of a peripheral ridge 3 and the change of the angle ß in the circumferential direction of 0-180 °, i. within the quadrants 1 Q and 2Q.
- the circumferential ridge 3 is considered to have a mean a of 12 ° inclination which is 18 ° along the zero degree radial plane NR and then decreases to 6 °.
- the value b is about 6.
- the fluctuation values b are in the range of approx. 6-9 for small mean values a, in the range of 1.8-3 for large average values a.
- the dashed lines indicate the total range, the solid lines the preferred range of the fluctuation value b as a function of Mean value of the angle ß over the circumference again.
- the dotted line connects the values marked by crosses of the peripheral webs 3 of the flow guide grid 1 from FIG. 1.
- the invention is not limited in its execution to the above-given preferred embodiments. Rather, a number of variants is conceivable, which makes use of the illustrated solution even with fundamentally different types of use.
- the Strömungsleitgitter in axial fans, centrifugal fans and diagonal fans can be used.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102015115308.4A DE102015115308A1 (en) | 2015-09-10 | 2015-09-10 | Flow guide for arrangement on a fan |
PCT/EP2016/068610 WO2017041967A1 (en) | 2015-09-10 | 2016-08-04 | Flow-conducting grille for arranging on a fan |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3308030A1 true EP3308030A1 (en) | 2018-04-18 |
EP3308030B1 EP3308030B1 (en) | 2020-03-11 |
Family
ID=55783347
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16750737.5A Active EP3308030B1 (en) | 2015-09-10 | 2016-08-04 | Flow-conducting grille for arranging on a fan |
Country Status (5)
Country | Link |
---|---|
US (1) | US10781829B2 (en) |
EP (1) | EP3308030B1 (en) |
CN (2) | CN205190352U (en) |
DE (2) | DE202015104813U1 (en) |
WO (1) | WO2017041967A1 (en) |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202015104813U1 (en) * | 2015-09-10 | 2015-10-15 | Ebm-Papst Mulfingen Gmbh & Co. Kg | Flow guide for arrangement on a fan |
CN106382259B (en) * | 2016-10-20 | 2019-05-24 | 宁波方太厨具有限公司 | A kind of range hood |
JP6609538B2 (en) * | 2016-11-18 | 2019-11-20 | 日立グローバルライフソリューションズ株式会社 | Electric blower and vacuum cleaner having the same |
CN107191415A (en) * | 2017-05-05 | 2017-09-22 | 珠海格力电器股份有限公司 | Grid structure and fan with same |
DE102017209291A1 (en) * | 2017-06-01 | 2018-12-06 | Ziehl-Abegg Se | Fan and guide grille for a fan |
CN207122442U (en) | 2017-08-18 | 2018-03-20 | 开利公司 | Fan casing and there is its air-conditioner set |
CN207795691U (en) * | 2018-01-13 | 2018-08-31 | 广东美的环境电器制造有限公司 | A kind of axial flow blower ducting assembly |
DE102018205300A1 (en) * | 2018-04-09 | 2019-10-10 | Ziehl-Abegg Se | Fan and inflow grille for a fan |
USD890328S1 (en) * | 2018-05-07 | 2020-07-14 | Ebm-Papst Mulfingen Gmbh & Co. Kg | Ventilation grid |
USD894366S1 (en) * | 2018-05-07 | 2020-08-25 | Ebm-Papst Mulfingen Gmbh & Co. Kg | Ventilation unit |
US11397011B2 (en) * | 2018-06-04 | 2022-07-26 | Mitsubishi Electric Corporation | Air-sending device and refrigeration cycle apparatus |
CN109611355A (en) * | 2018-11-29 | 2019-04-12 | 曾固 | A kind of big flow field acting device of air-flow and application |
DE102019213610B3 (en) * | 2019-09-06 | 2020-12-17 | Wilhelm Bruckbauer | Inlet nozzle |
USD938573S1 (en) * | 2019-11-27 | 2021-12-14 | Jiangmen Keye Electric Appliances Manufacturing Co. Ltd | Fan grille |
CN112503030B (en) * | 2020-12-03 | 2023-04-25 | 泛仕达机电股份有限公司 | Noise reduction flow guide grid |
CN217421645U (en) * | 2022-03-03 | 2022-09-13 | 阳光电源股份有限公司 | Cowl and fan device |
DE102022105365A1 (en) | 2022-03-08 | 2023-09-14 | Ebm-Papst Mulfingen Gmbh & Co. Kg | Protective device for arranging downstream of an impeller that can be rotated about an axis of rotation |
CN219101727U (en) | 2022-12-21 | 2023-05-30 | 台达电子工业股份有限公司 | Flow guiding grille |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2305136A (en) * | 1941-01-31 | 1942-12-15 | Wright Aeronautical Corp | Centrifugal blower construction |
US5466120A (en) * | 1993-03-30 | 1995-11-14 | Nippondenso Co., Ltd. | Blower with bent stays |
TW461937B (en) * | 1999-08-09 | 2001-11-01 | Daikin Ind Ltd | Fan guard of blower unit and air conditioner |
JP4482224B2 (en) * | 2000-12-26 | 2010-06-16 | 東芝キヤリア株式会社 | Air conditioner |
US6454537B1 (en) * | 2001-04-09 | 2002-09-24 | Lasko Holdings, Inc. | Fan grill construction |
JP2004156884A (en) * | 2002-11-08 | 2004-06-03 | Daikin Ind Ltd | Fan guard for blower unit |
WO2005073563A1 (en) * | 2004-01-30 | 2005-08-11 | Farmer Controls Plc | Electric fan |
EP1895166B1 (en) * | 2006-08-30 | 2009-02-11 | Ralf Meier | Flow director for a fan |
KR20090043715A (en) * | 2007-10-30 | 2009-05-07 | 삼성전자주식회사 | Fan-guard and outdoor unit for air conditioner |
US8696305B2 (en) * | 2011-06-01 | 2014-04-15 | Deere & Company | Axial fan assembly |
ES2598229T3 (en) * | 2011-06-29 | 2017-01-26 | Ebm-Papst Mulfingen Gmbh & Co. Kg | Axial fan with flow orientation body |
DE102011121025A1 (en) * | 2011-08-18 | 2013-02-21 | Ziehl-Abegg Ag | Motor suspension for fans, preferably axial fans, and method for producing a ventilation grille of such engine mount |
CN102758802B (en) * | 2012-07-18 | 2016-12-21 | Tcl空调器(中山)有限公司 | Protective cover, fan component and air-conditioner outdoor unit |
PT2778432E (en) | 2013-03-15 | 2016-01-29 | Ebm Papst Mulfingen Gmbh & Co | Ventilator assembly with flow rectifier |
DE102014116047A1 (en) * | 2014-11-04 | 2016-05-04 | Ebm-Papst Mulfingen Gmbh & Co. Kg | Protective grille with improved efficiency and noise behavior |
DE202015104813U1 (en) * | 2015-09-10 | 2015-10-15 | Ebm-Papst Mulfingen Gmbh & Co. Kg | Flow guide for arrangement on a fan |
-
2015
- 2015-09-10 DE DE202015104813.0U patent/DE202015104813U1/en not_active Expired - Lifetime
- 2015-09-10 DE DE102015115308.4A patent/DE102015115308A1/en active Pending
- 2015-11-05 CN CN201520877814.3U patent/CN205190352U/en active Active
-
2016
- 2016-08-04 WO PCT/EP2016/068610 patent/WO2017041967A1/en unknown
- 2016-08-04 CN CN201680044361.3A patent/CN107850085A/en active Pending
- 2016-08-04 EP EP16750737.5A patent/EP3308030B1/en active Active
-
2018
- 2018-02-02 US US15/886,949 patent/US10781829B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
CN107850085A (en) | 2018-03-27 |
US20180156240A1 (en) | 2018-06-07 |
DE102015115308A1 (en) | 2017-03-16 |
EP3308030B1 (en) | 2020-03-11 |
DE202015104813U1 (en) | 2015-10-15 |
CN205190352U (en) | 2016-04-27 |
US10781829B2 (en) | 2020-09-22 |
WO2017041967A1 (en) | 2017-03-16 |
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Inventor name: RATHGEB, JOSEF Inventor name: VOGEL, MANUEL Inventor name: HAAF, OLIVER Inventor name: MUELLER, JENS Inventor name: GEBERT, DANIEL |
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