EP2691657A1 - Roue de ventilateur en matériau composite pour ventilateur centrifuge et procédé de construction associé - Google Patents

Roue de ventilateur en matériau composite pour ventilateur centrifuge et procédé de construction associé

Info

Publication number
EP2691657A1
EP2691657A1 EP12718368.9A EP12718368A EP2691657A1 EP 2691657 A1 EP2691657 A1 EP 2691657A1 EP 12718368 A EP12718368 A EP 12718368A EP 2691657 A1 EP2691657 A1 EP 2691657A1
Authority
EP
European Patent Office
Prior art keywords
impeller
modules
composite material
assembled
interconnecting
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.)
Withdrawn
Application number
EP12718368.9A
Other languages
German (de)
English (en)
Inventor
Federico Bonomelli
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.)
Mako Shark SRL
Original Assignee
Mako Shark SRL
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 Mako Shark SRL filed Critical Mako Shark SRL
Publication of EP2691657A1 publication Critical patent/EP2691657A1/fr
Withdrawn legal-status Critical Current

Links

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
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
    • B29C70/86—Incorporated in coherent impregnated reinforcing layers, e.g. by winding
    • 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
    • F04D29/02—Selection of particular materials
    • F04D29/023—Selection of particular materials 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
    • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
    • F04D29/624—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/626—Mounting or removal of fans
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/08—Blades for rotors, stators, fans, turbines or the like, e.g. screw propellers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
    • F05C2225/08—Thermoplastics
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2253/00—Other material characteristics; Treatment of material
    • F05C2253/04—Composite, e.g. fibre-reinforced
    • 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
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/40—Organic materials
    • F05D2300/43—Synthetic polymers, e.g. plastics; Rubber
    • 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
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/60—Properties or characteristics given to material by treatment or manufacturing
    • F05D2300/603—Composites; e.g. fibre-reinforced

Definitions

  • the present invention concerns a centrifugal fan impeller made of composite material and relative construction method.
  • Centrifugal fan impellers can reach considerable dimensions, especially if used for moving large air flows, as occurs in big air conditioning systems. In these machines, the higher the rotation speed, the higher the machine efficiency, and therefore the centrifugal forces at play are particularly intense and it is very important for the impeller to be perfectly balanced.
  • Said composite materials combine a resistance comparable to that of metals with a density which is a fraction of that of metals.
  • a construction made of carbon fibre-based composite material can have a mass of even less than one third of an analogous steel construction.
  • Centrifugal fan impellers have been built using appropriately shaped sheets made of composite material, assembling them by structural gluing of appropriate connection elements, also made of composite material. In practice the construction scheme used for metals is replicated, adapted to the different material and relative technology.
  • the object of the present invention is to produce an impeller in composite material that overcomes the aforementioned drawbacks of the known art.
  • the object of the present invention is to produce an impeller made of composite material which allows reduction of the number of elements to be assembled and therefore reduction of the production cost.
  • a further object of the present invention is to produce an impeller made of composite material characterised by a reduced number of joints which come into contact with the flow of air conveyed.
  • a further object of the present invention is to produce an impeller made of composite material characterised by a high rigidity which allows use at high rotation regimes.
  • the centrifugal fan impeller made of composite material comprises a plurality of modules positioned side by side to form said impeller, first means suitable for interconnecting said modules, and second means suitable for connecting said impeller to a transmission hub, each of said modules constituting an air duct which develops from the central area towards the periphery of said impeller, said ducts being comprised entirely in said modules.
  • said first means comprise covers, positioned in the upper part and in the lower part of the impeller, made of composite material directly laminated on the outer surface of said modules during assembly of the impeller.
  • each of said modules has the following properties:
  • said modules are provided with appropriate joints to facilitate assembly.
  • the construction can also be reinforced by means of hoops obtained with rings made of composite material, if necessary formed on the impeller itself, or by means of metal rings fixed, for example, with a structural adhesive.
  • the particular characteristic of the invention is therefore that it minimises the number of structural components that have to be produced in an autoclave to obtain good mechanical and surface characteristics and consequently it reduces the number of components to be assembled.
  • the impeller thus obtained is without critical joints, with considerable benefits in terms of rigidity, resistance and reduction of the masses, with consequent considerable increase in performance, since the use of an impeller according to the invention allows significantly higher rotation speeds to be reached than in the impellers of the known art.
  • the impeller blades have a wing profile. As will be explained in detail below, this means that between one module and the adjacent module there is an empty space which can be filled with foamed polymer.
  • figure 1 shows, according to two orthogonal views, an impeller according to the invention
  • figure 2 shows, according to two orthogonal views, an exploded view of an impeller according to the invention
  • figure 3 is an exploded perspective of an impeller according to the invention.
  • figures 4 (a, b) show the base module of the impeller, according to three orthogonal views and one perspective view;
  • figure 5 shows the assembly of an impeller with blades shaped according to a wing profile.
  • (1) indicates an impeller made of composite material according to the invention, comprising a plurality of air ducts (1a), with axis (1 b), which develop from the central area towards the periphery.
  • the centrifugal impeller (1) shown in fig. 1 assembled and mounted on a hub (2) of a drive shaft, is obtained by assembling a plurality of modules (3).
  • Each of said modules (3) coincides substantially with one of the air ducts (1a), and is shown according to three orthogonal views in fig. 4a and according to one perspective view in fig. 4b.
  • the sides of the adjacent modules will be in contact with one another and will constitute the blades of the impeller.
  • the ducts (1a) of the impeller are comprised entirely in each of the modules (3).
  • said modules (3) are produced preferably in an autoclave, by means of suitable moulds, in order to obtain inner surfaces of the ducts (1a) characterised by a finish and a surface roughness compatible with the fluid dynamic efficiency required for these devices.
  • Each module (3) is preferably characterised by the fact that it has the following properties:
  • first means are provided suitable for interconnecting said modules (3), to form the impeller (1), and second means suitable for connecting said impeller (1) to the hub (2).
  • said first means suitable for interconnecting said modules (3) comprise covers, positioned in the upper part and in the lower part of the impeller, made of composite material directly laminated on the outer surface of said modules during assembly of the impeller.
  • said first means suitable for interconnecting said modules (3) to form said impeller (1), comprise a disc (31) made of composite material, positioned on the lower part of the modules (3), or of the impeller (1 ), and a cap (32) also made of composite material, positioned on the upper part of the modules (3) or of said impeller (1).
  • said disc and said cap can be produced by directly laminating the composite material on the outer surface of the modules.
  • glue the various modules by means of said cap and said disc instead of using further pre-fabricated joining elements, for example produced in an autoclave by means of a mould.
  • the impeller (1) is shaped so that the blades have a wing profile.
  • the modules (3) are preferably shaped so that the sides (30a) and (30b) of two adjacent modules form a hollow wing profile (fig. 5).
  • Said cavity comprised between said sides of the various adjacent modules is preferably filled with a foamed polymer (30c).
  • a foamed polymer (30c)
  • the presence of the foamed polymer inside the wing profile allows the rigidity of the blade to be considerably increased (up to 15% more compared to a hollow wing profile) with an almost negligible increase in weight.
  • said first means suitable for interconnecting modules (3) to form an impeller (1), also comprise hoops (4a, 4b, 4c), suitable for being mounted in appropriate seats, respectively (7a, 7b, 7c) obtained on said modules (3), said seats (7a, 7b, 7c) being shaped so that, when the modules (3) are assembled, they form substantially cylindrical circular surfaces.
  • said hoops (4a, 4b, 4c) are provided by bands of composite material, wound directly on the seats (7a, 7b, 7c) of the assembled modules (3), or consist of metallic rings, suitable for being fixed on the seats (7a, 7b, 7c) of the modules (3) according to the known technique, for example by means of adhesive.
  • the operations for assembly of the modules (3) can be facilitated by providing appropriate joints (not shown), suitable for maintaining the modules in the correct position. Fastening of the various pieces is then made more secure by the use of a structural adhesive.
  • the modules (3), the disc (31), the cap (32) and the hoops (4a, 4b, 4c) are all made of composite material, for example based on fibreglass, carbon or Kevlar, or a combination thereof, impregnated with epoxy, polyester or vinyl ester resins, or with thermoplastic resins.
  • Said hoops can be advantageously produced with unidirectional fibre bands.
  • said first means suitable for interconnecting modules (3) to form an impeller (1), comprise only the hoops (4a, 4b, 4c).
  • the plates (6) form an integral part of the modules (3).
  • each module (3) furthermore allows elimination of coupling inaccuracies with respect to the axis of rotation and therefore elimination of the subsequent machining for the balancing and centring necessary in the impellers of the known art.
  • the impeller (1) is assembled by appropriately positioning side by side the various modules (3) that compose it and locking the same by applying the disc (31), the cap (31) and if necessary the hoops (4a, 4b, 4c).
  • the various modules (3) can be fixed directly on the hub (2) of the drive shaft on which said impeller (1) is mounted without the help of templates or other costly equipment.
  • the method according to the invention for the production of impellers (1) made of composite material for centrifugal fans, comprises the following phases:

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

L'invention concerne une roue de ventilateur centrifuge (1) fabriquée en matériau composite, comprenant une pluralité de modules (3) agencés côte à côte pour former ladite roue (1), des premiers moyens destinés à relier entre eux lesdits modules (3) et des deuxièmes moyens destinés à relier la roue (1) à un moyeu (2), chaque module (3) constituant un conduit d'air (1a) pourvu d'un axe (1b), qui se développe de la zone centrale au périmètre de la roue (1), lesdits conduits (1a) étant compris entièrement dans lesdits modules (3).
EP12718368.9A 2011-03-30 2012-03-29 Roue de ventilateur en matériau composite pour ventilateur centrifuge et procédé de construction associé Withdrawn EP2691657A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000519A ITMI20110519A1 (it) 2011-03-30 2011-03-30 Girante in materiale composito di ventilatore centrifugo e relativo metodo di costruzione
PCT/IB2012/051518 WO2012131617A1 (fr) 2011-03-30 2012-03-29 Roue de ventilateur en matériau composite pour ventilateur centrifuge et procédé de construction associé

Publications (1)

Publication Number Publication Date
EP2691657A1 true EP2691657A1 (fr) 2014-02-05

Family

ID=43977182

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12718368.9A Withdrawn EP2691657A1 (fr) 2011-03-30 2012-03-29 Roue de ventilateur en matériau composite pour ventilateur centrifuge et procédé de construction associé

Country Status (3)

Country Link
EP (1) EP2691657A1 (fr)
IT (1) ITMI20110519A1 (fr)
WO (1) WO2012131617A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103603827A (zh) * 2013-11-20 2014-02-26 常山卫邦风机有限公司 一种离心风机叶轮结构及制作方法
EP3164605B1 (fr) * 2014-07-04 2019-03-27 Nuovo Pignone S.r.l. Fabrication d'un rouet de turbomachine par assemblage d'une pluralité d'éléments tubulaires
DE102014014287A1 (de) * 2014-09-24 2016-03-24 Ziehl-Abegg Se Lüfterrad
CN104832457A (zh) * 2015-03-19 2015-08-12 沈阳市金鑫冷暖设备制造安装有限公司 碳纤维模压风机叶轮组
RU201690U1 (ru) * 2020-09-25 2020-12-28 Общество с ограниченной ответственностью «УралАктив» Вентилятор

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4139293A1 (de) * 1991-11-29 1993-06-03 Inst Verbundwerkstoffe Gmbh Faserkunststoffverbund-laufrad fuer eine radialstroemungsmaschine
DE19525829A1 (de) * 1995-07-15 1997-01-16 Abb Research Ltd Lüfter

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2012131617A1 *

Also Published As

Publication number Publication date
WO2012131617A1 (fr) 2012-10-04
ITMI20110519A1 (it) 2012-10-01

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