EP4177478A1 - Axiallüfter mit integriertem schalldämpfer - Google Patents

Axiallüfter mit integriertem schalldämpfer Download PDF

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Publication number
EP4177478A1
EP4177478A1 EP21382993.0A EP21382993A EP4177478A1 EP 4177478 A1 EP4177478 A1 EP 4177478A1 EP 21382993 A EP21382993 A EP 21382993A EP 4177478 A1 EP4177478 A1 EP 4177478A1
Authority
EP
European Patent Office
Prior art keywords
cylindrical housing
axial fan
sections
axial
inner lining
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.)
Pending
Application number
EP21382993.0A
Other languages
English (en)
French (fr)
Inventor
Javier TORRE JUERA
Albert OMS ESCURA
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.)
Talleres Zitron SA
Original Assignee
Talleres Zitron SA
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 Talleres Zitron SA filed Critical Talleres Zitron SA
Priority to EP21382993.0A priority Critical patent/EP4177478A1/de
Publication of EP4177478A1 publication Critical patent/EP4177478A1/de
Pending 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
    • 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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/522—Casings; Connections of working fluid for axial pumps especially adapted for elastic fluid pumps
    • 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
    • F04D29/663—Sound attenuation
    • F04D29/664—Sound attenuation by means of sound absorbing material
    • 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 present invention belongs to the field of air conditioning in industrial environments, and more particularly in ships.
  • the object of the present invention is a new axial fan having an integrated silencer.
  • large axial fans are known having a propeller actuated by an electric motor and a normally cylindrical housing where the propeller is provided.
  • the propeller comprises a number of blades that, when moving rotationally, draw air from an end of the cylindrical housing and push said air towards an opposite end of said cylindrical housing.
  • a known application of these large fans is the ventilation of the engine room of ships.
  • the fans are placed in cylindrical passages in the hull of the ship for expelling hot and stale air from the engine room towards the outside.
  • the engine room of a ship is naturally a very noisy room due to the engines operating therein, and the fans themselves are also quite noisy.
  • a known fan silencer is mainly a portion of tubular duct having an inner lining made of a noise absorbing material, such as rock wool or the like.
  • the silencer is connected directly to an end the fan housing, thereby damping the noise transmitted through said end of the fan housing.
  • Fig. 1 shows an example of such a prior art silencer (100) comprising a cylindrical housing (101) open at both ends and having an internal rock wool lining (102).
  • a cylindrical frame (103) consisting of a perforated metal plate is provided inside the housing (101).
  • the housing (101) further comprises a flange (104) for connecting the silencer (100) to the fan (200).
  • the silencer (100) is connected to the fan (200) using connecting means such as bolts, screws or the like.
  • the resulting combination of silencer (100) and axial fan (200) is shown in Fig. 3 .
  • a drawback of this configuration is connected to the large space requirements. Indeed, the silencer (100) and the fan (200) are connected one after the other in the axial direction, i.e. the airflow direction.
  • the volume needed for the combination of both elements can be twice or more the volume of the fan (200) alone.
  • the invention discloses an axial fan having a noise absorbing material provided on the inner surface of the cylindrical housing.
  • the axial fan of the invention therefore comprises an integrated silencer not requiring more space than a conventional axial fan.
  • Tangential/axial These terms are to be interpreted according to a cylindrical coordinate system.
  • the axial direction refers to a direction contained in the central axis of the cylindrical housing
  • the tangential direction refers to a direction tangential to the cylindrical housing and contained in a plane perpendicular to the fan axial direction.
  • Inner/outer Terms such as “inner”, “inside”, etc. refer to the side or portion of a particular element that is closest to the central axis of the cylindrical housing. Accordingly, terms such as “ outer “, “outside”, etc. refer to the side or portion of a particular element that is farthest from the central axis of the cylindrical housing.
  • the axial fan of the invention comprises a motor mechanically connected to an impeller and supported by a support base inside a cylindrical housing.
  • the impeller is normally made by a plurality of blades, for example eight blades, protruding from a hub connected to the shaft of the motor such that, when the motor causes the shaft to rotate, the blades propel air through the cylindrical housing from an air-drawing end towards an air-expelling end.
  • the motor is normally an electric motor fed by an electrical current transmitted through electrical wires.
  • the support base can adopt a number of configurations.
  • the support base may comprise a plate positioned within the cylindrical housing in a position such that, when the motor is fixed thereto by means of bolts, screws or the like, the shaft of the motor is positioned along the axial axis of the cylindrical housing.
  • the support base can be attached to the cylindrical housing by means of two or more connection arms or plates.
  • the axial fan of the invention differs from said known axial fans by comprising an inner lining made of a plurality of adjacent sections made of a noise absorbing material and fixed to the inner surface of the cylindrical housing.
  • the inner lining sections are provided side-by-side to cover essentially all the inner surface of the cylindrical housing without leaving voids through which noise can escape the axial fan. In that manner, the noise caused by the axial fan is dampened by said inner lining, and there is no need to use a silencer as a separate body attached to the cylindrical housing.
  • This configuration is advantageous in that the silencer does not take additional space.
  • the silencer does not take additional space.
  • only the damaged sections need be replaced.
  • the inner lining sections may have any shape provided they cover essentially all the inner surface of the cylindrical housing. Normally, the inner lining sections will have a parallellepipedic shape fitting ones with the others to render an essentially continuous lining covering the whole inner surface of the cylindrical housing, such as e.g. a squared shape or a rectangular shape.
  • the inner lining sections are tangentially adjacent longitudinal sections having a rectangular shape with two long axial sides and two short tangential sides. The length of the long axial sides of the inner lining sections is essentially the same as the length of the cylindrical housing in the axial direction. Said inner lining sections are provided such that the long axial sides of tangentially adjacent longitudinal sections are placed side-by-side in parallel to said axial direction.
  • This configuration is advantageous in that inner lining sections fit naturally and easily ones with the others and also with the inner surface of the cylindrical housing, thus covering said inner surface of the cylindrical housing completely and without leaving voids.
  • the inner lining sections are fixed to the inner surface of the cylindrical housing by means of metal rims attached to the ends of the cylindrical housing that press the ends of the inner lining sections against the cylindrical housing. That is, at least two metal rims are attached to the ends of the cylindrical housing over the respective ends of the inner lining sections, thereby holding said inner lining sections against said inner surface of the cylindrical housing.
  • a third additional metal rim can be provided at a middle section of the cylindrical housing for further ensuring that the inner lining sections are duly attached to the inner surface of the cylindrical housing.
  • the connection between these rims and the inner surface of the cylindrical housing may be e.g. through bolts or screws.
  • This configuration is advantageous in that a fast and simple, yet reliable manner to attach the sections to the cylindrical housing is provided, dispensing with the need to attach each of the sections individually by means of a multiplicity of screws or the like.
  • the inner surface of the inner lining sections comprises a cover preventing the noise absorbing material from detaching.
  • the inner surface of the inner lining sections refers to the side closest to the central axis of the cylindrical housing.
  • the noise absorbing material is usually a fragile material which can very easily deteriorate with the strong air currents passing through the axial fan.
  • This configuration is advantageous in that, by dispensing with the use of a cylindrical frame, replacement of inner lining sections is faster and more convenient. Furthermore, the axial fan is made simpler and lighter.
  • the cover may be made of any material provided the noise absorbing material is duly enclosed.
  • the cover can be made of a suitably durable and flexible material, such as e.g. glass fibre.
  • This configuration is advantageous in that these materials are sufficiently resistant and, at the same time, economic and easily obtainable.
  • the noise absorbing material can be any material having high noise dampening properties and suitable to be shaped as a lining for a cylindrical surface.
  • the noise absorbing material is rock wool.
  • rock wool is advantageous because it is commonly used in this field and therefore economic and easily obtainable.
  • noise dampening may be needed at a particular end of the axial fan, i.e. at the air drawing end or at the air propelling end.
  • the silencer was connected to the cylindrical housing at one or the other end of the fan.
  • the impeller is provided at an end of the cylindrical housing, thereby providing a noise dampening effect towards the opposite end of the axial fan.
  • This configuration is advantageous in that a higher noise dampening effect can be provided at a particularly desired end of the axial fan.
  • the axial fan (1) comprises an electrical motor (2) with an impeller (3) mechanically connected to the shaft.
  • the electric motor (2) is fixed to a support base (4) by means of screws.
  • the support base (4) is formed by a central metal plate, to which the electric motor (2) is fixed, and two side metal plates connected to a cylindrical housing (5).
  • the cylindrical housing (5) therefore encloses the motor (2) such that the shaft thereof is positioned along an axial axis of the cylindrical housing (5).
  • the impeller (3) is positioned at an end of the cylindrical housing (5), therefore dampening the noise emitted by the axial fan (1) towards the opposite end of the cylindrical housing (5).
  • a noise dampening inner lining formed by a plurality of rectangular sections (6) is attached to the inner surface of the cylindrical housing (5).
  • Fig. 6 shows a schematic view of an inner lining section (6) having two long axial sides (61) and two short tangential sides (62).
  • the inner lining section (6) is made of a noise dampening material such as rock wool.
  • the inner lining section (6) further comprises a cover (63) provided at the inner side and the two long sides.
  • the cover (63) is made of glass fibre, e.g. type E glass fibre having about 53-54% SiO 2 and 14-15.5% Al 2 O 3 .
  • Type E glass fibre is fire resistant as well as essentially dielectric.
  • a plurality of these inner lining sections (6) is attached to the inner surface of the cylindrical housing (5).
  • the sections (6) are positioned with their long sides (61) in an axial direction and tangentially adjacent each other such that no voids are left between them.
  • the length of the sections (6) is coincident with the length of the cylindrical housing (5).
  • a pair of cylindrical rims (8) are attached to the ends of the cylindrical housing (5) over the corresponding ends of said sections (6). That is, the rims (8) compress the ends of the sections (6) against the inner surface of the cylindrical housing (5).
  • the attachment between the rims (8) and the cylindrical housing (5) is carried out e.g. by means of screws.
  • the inner lining provides a suitable noise dampening effect by covering all of said inner surface of the cylindrical housing (5). Since only the inner side of the sections (6) is exposed, the cover (63) protects the rock wool and prevents it from detaching when the axial fan (1) is in use.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP21382993.0A 2021-11-03 2021-11-03 Axiallüfter mit integriertem schalldämpfer Pending EP4177478A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP21382993.0A EP4177478A1 (de) 2021-11-03 2021-11-03 Axiallüfter mit integriertem schalldämpfer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP21382993.0A EP4177478A1 (de) 2021-11-03 2021-11-03 Axiallüfter mit integriertem schalldämpfer

Publications (1)

Publication Number Publication Date
EP4177478A1 true EP4177478A1 (de) 2023-05-10

Family

ID=78528883

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21382993.0A Pending EP4177478A1 (de) 2021-11-03 2021-11-03 Axiallüfter mit integriertem schalldämpfer

Country Status (1)

Country Link
EP (1) EP4177478A1 (de)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1428051A1 (de) * 1963-04-05 1968-11-28 Eugen Bauer Schalldaempfungsvorrichtung fuer Grossgeblaese,insbesondere Grubenluefter
JPS5380106U (de) * 1976-12-07 1978-07-04
US20090220334A1 (en) * 2008-02-28 2009-09-03 Spx Cooling Technologies, Inc. Fan shroud for heat exchange tower fans
WO2013053342A1 (de) * 2011-10-11 2013-04-18 Cft Gmbh Compact Filter Technic Lüfter mit schallgedämpftem lüftergehäuse
CN111577665A (zh) * 2020-06-15 2020-08-25 上海进贤机电科技有限公司 综合管廊用大风量低噪声立式安装轴流风机
JP2020165355A (ja) * 2019-03-29 2020-10-08 パナソニックＩｐマネジメント株式会社 軸流送風機

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1428051A1 (de) * 1963-04-05 1968-11-28 Eugen Bauer Schalldaempfungsvorrichtung fuer Grossgeblaese,insbesondere Grubenluefter
JPS5380106U (de) * 1976-12-07 1978-07-04
US20090220334A1 (en) * 2008-02-28 2009-09-03 Spx Cooling Technologies, Inc. Fan shroud for heat exchange tower fans
WO2013053342A1 (de) * 2011-10-11 2013-04-18 Cft Gmbh Compact Filter Technic Lüfter mit schallgedämpftem lüftergehäuse
JP2020165355A (ja) * 2019-03-29 2020-10-08 パナソニックＩｐマネジメント株式会社 軸流送風機
CN111577665A (zh) * 2020-06-15 2020-08-25 上海进贤机电科技有限公司 综合管廊用大风量低噪声立式安装轴流风机

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