EP2225468B1 - Ensemble de support moteur pour ventilateur axial - Google Patents

Ensemble de support moteur pour ventilateur axial Download PDF

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Publication number
EP2225468B1
EP2225468B1 EP08861453.2A EP08861453A EP2225468B1 EP 2225468 B1 EP2225468 B1 EP 2225468B1 EP 08861453 A EP08861453 A EP 08861453A EP 2225468 B1 EP2225468 B1 EP 2225468B1
Authority
EP
European Patent Office
Prior art keywords
axial fan
vane
motor
angle
fan according
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
EP08861453.2A
Other languages
German (de)
English (en)
Other versions
EP2225468A2 (fr
Inventor
Colin Biggs
Wayne Glover
Anthony Breen
Clement Nguyen
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.)
Nuaire Ltd
Original Assignee
Nuaire Ltd
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 Nuaire Ltd filed Critical Nuaire Ltd
Priority to PL12195103T priority Critical patent/PL2592281T3/pl
Priority to EP12195103.2A priority patent/EP2592281B1/fr
Publication of EP2225468A2 publication Critical patent/EP2225468A2/fr
Application granted granted Critical
Publication of EP2225468B1 publication Critical patent/EP2225468B1/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
    • 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
    • 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
    • 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
    • F04D25/10—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation the unit having provisions for automatically changing direction of output air
    • 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
    • F04D25/12—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation the unit being adapted for mounting in apertures
    • 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
    • F04D29/542—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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/54—Fluid-guiding means, e.g. diffusers
    • F04D29/56—Fluid-guiding means, e.g. diffusers adjustable
    • F04D29/563—Fluid-guiding means, e.g. diffusers adjustable specially adapted for elastic fluid pumps

Definitions

  • This invention relates generally to an axial fan and, more particularly, to an improved mounting arrangement for mounting the motor of an axial fan within an outer case.
  • an axial fan typically comprises an outer cylindrical case 10 within which a motor 12 is mounted, with pressed or fabricated steel brackets 14 being used to connect and hold the motor within the case 10.
  • An impeller 16 is also provided within the case 10, which comprises a plurality of blades 18 extending from a central hub, and which is connected to the shaft of the motor for propulsion thereby.
  • US 0133815 discloses a fan apparatus comprising a fan with fan blades, a motor and fan support structure having an opening for permitting airflow through the fan.
  • the support structure includes two support brackets formed of one integral metal piece comprising a central section and two similar wing sections extending from opposite ends of the central section, whereby each wing section forms an obtuse angle with the central section.
  • GB 1330620 discloses an axial flow blower comprising a blower motor with supporting spokes by which it may be secured to a housing where each supporting spoke has a limb which on each extremity carries a fastening element movable and lockable relative to said spoke.
  • Invention aims to provide the precise alignment of the central axis of the blower with the central axis of the motor so as to obtain accurate and efficient operation of the axial flow blower.
  • DE 20312448 discloses a ventilator that has a motor-driven fan with a hub and fan blades rotating on a spindle within a housing.
  • the housing has an outer frame which is linked to the spindle supports by ribs.
  • the ribs have a cambered cross-sectional profile which deflects oncoming air, thereby optimising the angle of attack of the fan blades to the oncoming air flow. Therefore the ribs act in the same way as a stator rotor blade.
  • DEI 03 58917 discloses a housing of an axial flow fan for a computer having stator blades arranged in an outer frame, corresponding to air guides formed at one side of the outer frame.
  • CH 318567 and GB907323 disclose movable stator vanes which are applied to provide optimal working conditions at different operating states of axial flow pumps i.e. the stator vanes help direct the airflow at the optimum angle onto the rotor blades.
  • the documents also disclose the effect of operating at variable rotor speeds in order to operate at different operating states.
  • the pitch of the adjustable stator rotor blades is adjusted in dependence upon the ratio between the axial velocity of the fluid and the circumferential speed (also known as the flow coefficient).
  • an axial fan comprising a motor, an outer casing and one or more support arms adapted to mount said motor within said outer casing, whereby said one or more support arm comprises an elongate vane arranged and configured to extend between said motor and the inner wall of said casing, and a connecting portion for connecting said vane to said motor, characterised in that said connecting portion comprises means for varying the angle of the surface of said vane relative to the direction of airflow through said axial fan.
  • the support arm vane is designed to be fixed to the motor and not varied in angular position during service.
  • the angle is pre-selected as a specific service angle and fixed in place.
  • the invention enables specific angled arm vane to be used in variable angular orientations dependent upon the "in service” requirements and the specific fan structure and size. Accordingly, it is preferred that the vane is secured with respect to the motor at a specific "in service” angular orientation and not subsequently varied.
  • the vane is secured to the motor by means of a tightening mechanical fixing such that the orientation of the vane cannot be varied (once fixed) without releasing the mechanical fixing by untightening.
  • said connecting portion comprises an arcuate slot defining a plurality of selectable angular orientations at which said elongate vane can be mounted.
  • the arcuate slot is provided on a connecting plate which is substantially perpendicular to, and formed integrally with, said elongate vane.
  • the arcuate slot is beneficially arranged and configured to receive a connector such that it extends through said slot into a mounting hole provided on said motor.
  • the angle of the surface of the vane measured between a first axis perpendicular to the longitudinal axis of said elongate vane and a second axis parallel to the longitudinal axis of said axial fan, is between 80° and 50°, and more preferably between 70° and 55°. In one preferred embodiment, the angle is between 65° and 60°.
  • the angle of the profile of the elongate vane varies along its length.
  • the elongate vane might be twisted through, say, 15° along its length.
  • the vane could be bent by, say, 15° at, say, 3/3 of its full length.
  • a support arm for a mounting arrangement for mounting a motor of an axial fan within an outer casing comprising an elongate vane arranged and configured to extend between said motor and the inner wall of said casing, and a connecting portion for connecting said vane to said motor, wherein the angle of the profile of the elongate vane varies along its length.
  • the elongate vane might be twisted through, say, 15° along its length.
  • the vane could be bent by, say, 15° at, say, 3/3 of its full length.
  • the present invention extends to an axial fan comprising a motor and an impeller housed within an outer casing, the fan further comprising a mounting assembly for mounting said motor within said casing, the mounting assembly comprising one or more support arms as defined above connected between said motor and the inner wall of said outer casing.
  • the support arms are connected between the motor and the inner walls of said outer casing by means of a connector assembly comprising means for connecting said vane to said motor at a selected one of a plurality of longitudinal distances from said impeller.
  • the motor may be provided with a plurality of discrete, beneficially substantially equi-distant, mounting holes defining the respective distances.
  • an axial fan comprising a motor and an impeller housed within an outer casing, the fan further comprising a mounting assembly for mounting said motor within said casing, said mounting assembly comprising at least one elongate vane extending between the inner wall of said casing and said motor and being connected to said motor by means of a connector assembly comprising means for connecting said vane to said motor at a selected one of a plurality of distances from said impeller.
  • brackets that are manufactured in an aerofoil section and are twisted along their length, a significant improvement in aerodynamic performance (i.e. movement of larger volumes of air at higher pressure) can be achieved. Further improvement can be achieved by making the brackets adjustable, such that the distance thereof from the impeller can be varied and the angle thereof can be matched to the direction of airflow, depending on the type of impeller being used.
  • the fan further comprises an impeller 34 consisting of a plurality of blades 36 extending from a central hub.
  • the impeller 34 is housed within the case 30 and connected to the shaft of a motor 38 for propulsion thereby.
  • the motor 38 is mounted within the case 30 by four substantially equi-distant arms 40 which are connected between the outer circumference of the motor 38 and the inner wall of the cylindrical case 30.
  • each arm 40 comprises an elongate portion 40a and a mounting portion 40b.
  • the elongate portion 40a is of substantially aerofoil section and of a length sufficient to extend between the outer circumference of the motor casing and the inner wall of the cylindrical case.
  • the mounting portion 40b extends substantially perpendicular to the elongate portion 40a and is provided with an arcuate slot 42.
  • the arm 40 is connected to the motor by means of a screw or pin which extends through the arcuate slot 42 and into a mounting hole in the motor housing.
  • a plurality of mounting holes 46 may be provided along a portion of the length of the motor housing, such that the arm 40 may be mounted at a selected one of a number of distances from the impeller.
  • the arcuate slot 42 enables the angle of the elongate portion 40a of the arm 40 to be varied, as can be seen more clearly in Figure 6 of the drawings.
  • the angle referred to in this case is the angle between a first axis (X) which is perpendicular to the length of the elongate portion 40a of the arm and a second axis (Y) which is perpendicular to the flange 32 of the cylindrical case 30.
  • the mounting portion of the arm 40 is connected to the motor housing at the end of the arcuate slot 42 closest to the elongate portion 40a of the arm 40 and the arm 40 is at 90°.
  • connection point between the mounting portion 40b of the arm and the motor housing has moved along the arcuate slot 42 in a direction away from the elongate portion 40a of the arm 40 and the arm 40 is at 75°.
  • connection point has moved even further along the arcuate slot 42 in a direction away from the elongate portion 40a of the arm 40 and the arm 40 is at 60°.
  • Figure 7 shows the relationship of velocities for an axial fan blade at a working point, and the three velocities to be considered are:
  • Figure 13 shows the force applied on the impeller blade.
  • pressure of air is perpendicular to the surface of the impeller blade and creates a dynamic force oriented by the angle " ⁇ ".
  • the support arms should be oriented at the same angle as ⁇
  • the total efficiency of the fan can be increased by setting the angle of the support arms to match the direction of airflow, depending on the type of impeller and the angle of the impeller blades. It has been further observed that the total efficiency of the fan can be increased by changing the angle of the arms from 90° (prior art) to 60° as discussed above in relation to Figures 9 and 10 respectively. It has also been observed that, at least in some applications, the efficiency can start to drop again from an arm angle of around 55°. From these results, it is considered that, at least for some applications, the optimum arm angle may be 65° to 60°.
  • the air flow direction along the length of the impeller blade may be located within an interval of, say, 15°.
  • the airflow direction might be about 45° and the direction might change to about 60° further along the blade towards the motor, as illustrated in Figure 14 .
  • the arm 40 might be twisted through, say, 15° along its length.
  • the arm 40 could be bent by, say, 15° at, say, 3/3 of its full length. Whilst it is thought that the first embodiment ( Figure 3 ) might provide a solution closest to the ideal, the second embodiment ( Figure 4 ) may be more practical in terms of fabrication.

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)

Claims (12)

  1. Ventilateur axial comprenant un moteur (38), une tuyère extérieure (30) et un ou plusieurs bras de support (40) adaptés pour monter ledit moteur (38) à l'intérieur de ladite tuyère extérieure (30), ledit ou lesdits bras de support (40) comprenant une aube allongée (40a) agencée et configurée pour être disposée entre ledit moteur (38) et ladite paroi intérieure de ladite tuyère (30), et une partie de liaison (40b) pour relier ladite aube (40a) audit moteur (38), caractérisé en ce que ladite partie de liaison (40b) comprend un moyen pour faire varier l'angle de la surface de ladite aube (40a) par rapport à la direction de l'écoulement d'air à travers ledit ventilateur axial.
  2. Ventilateur axial selon la revendication 1, dans lequel l'aube est fixée par rapport au moteur au moyen d'une fixation mécanique de telle sorte que l'orientation de l'aube ne puisse pas être modifiée, une fois qu'elle est fixée, sans desserrage de la fixation mécanique.
  3. Ventilateur axial selon la revendication 1 ou la revendication 2, dans lequel la partie de liaison comprend une fente courbe définissant une pluralité d'orientations angulaires sélectionnables suivant lesquelles peut être montée ladite aube allongée.
  4. Ventilateur axial selon la revendication 3, dans lequel la fente courbe est prévue sur une plaque de liaison qui est essentiellement perpendiculaire à ladite aube allongée et en fait partie intégrante.
  5. Ventilateur axial selon la revendication 3 ou la revendication 4, dans lequel la fente courbe est agencée et configurée pour recevoir un raccord de telle sorte que ledit raccord s'étende au travers de ladite fente dans un trou de montage prévu sur le boîtier dudit moteur.
  6. Ventilateur axial selon l'une quelconque des revendications précédentes, dans lequel l'angle de la surface de l'aube, mesuré entre un premier axe perpendiculaire à l'axe longitudinal de ladite aube allongée et un deuxième axe parallèle à l'axe longitudinal dudit ventilateur axial, est compris entre 80° et 50°.
  7. Ventilateur axial selon la revendication 6, dans lequel ledit angle est compris entre 70° et 55°.
  8. Ventilateur axial selon la revendication 7, dans lequel ledit angle est compris entre 65° et 60°.
  9. Ventilateur axial selon l'une quelconque des revendications précédentes, dans lequel l'angle du profil de l'aube allongée varie sur sa longueur.
  10. Ventilateur axial selon la revendication 9, dans lequel l'aube allongée est vrillée sur toute sa longueur.
  11. Ventilateur axial selon la revendication 9, dans lequel l'aube est courbée d'un certain angle à un point sur toute sa longueur.
  12. Procédé d'assemblage d'un ventilateur axial selon l'une quelconque des revendications 1 à 11, dans lequel le ou les bras de support (40) peuvent être fixés au moteur (38) à des angles variables et sont fixés à un angle prédéterminé de telle sorte que l'angle reste fixe pendant le fonctionnement du ventilateur axial.
EP08861453.2A 2007-12-14 2008-12-15 Ensemble de support moteur pour ventilateur axial Active EP2225468B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PL12195103T PL2592281T3 (pl) 2007-12-14 2008-12-15 Wentylator osiowy
EP12195103.2A EP2592281B1 (fr) 2007-12-14 2008-12-15 Ventilateur axial

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0724355.3A GB2455553B (en) 2007-12-14 2007-12-14 Motor mounting assembly for an axial fan
PCT/GB2008/004131 WO2009077737A2 (fr) 2007-12-14 2008-12-15 Ensemble de support moteur pour ventilateur axial

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP12195103.2A Division EP2592281B1 (fr) 2007-12-14 2008-12-15 Ventilateur axial
EP12195103.2 Division-Into 2012-11-30

Publications (2)

Publication Number Publication Date
EP2225468A2 EP2225468A2 (fr) 2010-09-08
EP2225468B1 true EP2225468B1 (fr) 2013-09-25

Family

ID=39048084

Family Applications (2)

Application Number Title Priority Date Filing Date
EP12195103.2A Active EP2592281B1 (fr) 2007-12-14 2008-12-15 Ventilateur axial
EP08861453.2A Active EP2225468B1 (fr) 2007-12-14 2008-12-15 Ensemble de support moteur pour ventilateur axial

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP12195103.2A Active EP2592281B1 (fr) 2007-12-14 2008-12-15 Ventilateur axial

Country Status (5)

Country Link
EP (2) EP2592281B1 (fr)
ES (1) ES2561717T3 (fr)
GB (1) GB2455553B (fr)
PL (1) PL2592281T3 (fr)
WO (1) WO2009077737A2 (fr)

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CN101839248B (zh) * 2010-03-24 2011-08-24 常熟市鼓风机有限公司 纺织车间用的通风装置
CN107129538B (zh) 2010-04-27 2021-07-16 西兰制药公司 Glp-1受体激动剂和胃泌素的肽缀合物及其用途
TW201326194A (zh) 2011-11-03 2013-07-01 Zealand Pharma As Ｇｌｐ－１胃泌素受體促效劑肽結合物
IN2015DN00544A (fr) 2012-07-23 2015-06-26 Zealand Pharma As
TWI608013B (zh) 2012-09-17 2017-12-11 西蘭製藥公司 升糖素類似物
US9988429B2 (en) 2013-10-17 2018-06-05 Zealand Pharma A/S Glucagon analogues
PL3057984T3 (pl) 2013-10-17 2018-12-31 Zealand Pharma A/S Acylowane analogi glukagonu
WO2015067715A2 (fr) 2013-11-06 2015-05-14 Zealand Pharma A/S Composés agonistes doubles de gip et glp-1 et procédés associés
CN105829339B (zh) 2013-11-06 2021-03-12 西兰制药公司 胰高血糖素-glp-1-gip三重激动剂化合物
KR102620911B1 (ko) 2014-10-29 2024-01-05 질랜드 파마 에이/에스 Gip 효능제 화합물 및 방법
DK3283507T3 (da) 2015-04-16 2020-01-02 Zealand Pharma As Acyleret glucagonanalog
CN104879327A (zh) * 2015-06-01 2015-09-02 蚌埠市蚌风风机有限公司 一种轴流通风机
CN106122056B (zh) * 2016-08-24 2018-11-27 中国船舶电站设备有限公司 一种负载箱散热系统及其专用的轴流风机
EP3551651B1 (fr) 2016-12-09 2024-03-06 Zealand Pharma A/S Doubles agonistes glp-1/glp-2 acylés
KR102156631B1 (ko) * 2019-11-18 2020-09-16 (주)신광 펌프 구조체
CN113898419A (zh) * 2021-10-10 2022-01-07 中国航发沈阳发动机研究所 一种进气机匣结构及其组装方法

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US20050186070A1 (en) * 2004-02-23 2005-08-25 Ling-Zhong Zeng Fan assembly and method

Also Published As

Publication number Publication date
EP2592281B1 (fr) 2015-10-28
GB2455553A (en) 2009-06-17
EP2225468A2 (fr) 2010-09-08
PL2592281T3 (pl) 2016-07-29
ES2561717T3 (es) 2016-02-29
WO2009077737A2 (fr) 2009-06-25
WO2009077737A3 (fr) 2009-08-20
GB0724355D0 (en) 2008-01-30
GB2455553B (en) 2012-10-24
EP2592281A1 (fr) 2013-05-15

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