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WO2000057064A1 - Insulated fan - Google Patents

Insulated fan Download PDF

Info

Publication number
WO2000057064A1
WO2000057064A1 PCT/TR1999/000015 TR9900015W WO0057064A1 WO 2000057064 A1 WO2000057064 A1 WO 2000057064A1 TR 9900015 W TR9900015 W TR 9900015W WO 0057064 A1 WO0057064 A1 WO 0057064A1
Authority
WO
WIPO (PCT)
Prior art keywords
fan
insulated
nut
hub
lower plate
Prior art date
Application number
PCT/TR1999/000015
Other languages
French (fr)
Inventor
Ridvan EGİN
Aydin Bahadir
M. Burçak ASLAN
Original Assignee
Türk Elektri̇k Endüstri̇si̇ A.Ş.
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 Türk Elektri̇k Endüstri̇si̇ A.Ş. filed Critical Türk Elektri̇k Endüstri̇si̇ A.Ş.
Priority to PCT/TR1999/000015 priority Critical patent/WO2000057064A1/en
Priority to AU33525/99A priority patent/AU3352599A/en
Priority to TR2001/02654T priority patent/TR200102654T2/en
Publication of WO2000057064A1 publication Critical patent/WO2000057064A1/en

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/02Selection of particular materials
    • F04D29/023Selection of particular materials especially adapted for elastic fluid pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/26Rotors specially for elastic fluids
    • F04D29/263Rotors specially for elastic fluids mounting fan or blower rotors on shafts
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/26Rotors specially for elastic fluids
    • F04D29/28Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/281Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
    • F04D29/282Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers the leading edge of each vane being substantially parallel to the rotation axis
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05DINDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2230/00Manufacture
    • F05D2230/50Building or constructing in particular ways
    • F05D2230/53Building or constructing in particular ways by integrally manufacturing a component, e.g. by milling from a billet or one piece construction
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05DINDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00Materials; Properties thereof
    • F05D2300/40Organic materials
    • F05D2300/43Synthetic polymers, e.g. plastics; Rubber

Definitions

  • invention is concerned with ensuring electrical insulation of fans in contact with liquids in applications such as wet/dry vacuum cleaner apparels and alike, thus with preventing liquid leakage to motor and obtaining a less unbalanced motor structure.
  • armature group and fan are assembled on the insulated shaft.
  • slot insulation and further to that plastic injection over rotor shaft is needed.
  • the outer diameter of the shaft fitted in the inner diameter of armature is to be held smaller owing to plastic injection. Reducing the diameter of the shaft further would, in turn, affect dynamic behaviour of armature.
  • thinner shaft in compact motors would cause the armature having undesirable behaviours as regard to the rotor dynamics.
  • insulating the shaft is costly and this is a disadvantage.
  • Figure 1 is the view before the insulated fan hub is formed.
  • Figure 2 is the view of the fan lower plate prepared by fan hub cast.
  • Figure 3 is the view as exploded of fan blades of the insulated fan lower plate and its connection to the upper plate.
  • Figure 4 is the three dimensional section view taken laterally of the insulated fan.
  • Figure 5 is three dimensional view from bottom of the insulated fan.
  • Figure 6 is the three dimensional view from the top of the insulated fan.
  • Non-insulated fan is formed by joining lower plate (3), in the medium part of which fan hub (7) is formed through insert cast, to upper plate (8) using fan blades (6).
  • fixing openings are located (1) to hub portion of the lower aluminium plate.
  • the position of the fixing openings (1) are to be symmetrical with respect to each other in order to ensure balance.
  • the distances of the openings to the hub (1) are adjusted according to the varying diameter of the lower plate (3) with changing size of the motor.
  • the number of the openings may vary for the moulding on both surfaces, hold up each other strongly.
  • the nut (2) used for the assembly of the fan is attached to the shaft within the mould.
  • the nut (2) is located in the mould such that it is concentric with the lower plate (3).
  • the positioning of the nut (2) should be at optimum level.
  • Plastic material flows through the fixing openings to the other side by the injection process.
  • a concentric fan hub, in which a nut is located, is obtained on the lower plate. Forming the fan hub in this way (7) ensures the nut (2) being fixed to lower plate (3) with electrical insulation made there of.
  • a moisture proof set is formed (9) by provision of an outward slope of the edge which is formed by the moulding process on the lower surface of the lower plate (3) and away from the hub.
  • the outer edge of the moisture proof set (9) is provided with a slope outwards to enable re-directing of the moisture coming from outside. In this way the effect of the moisture and detergents on the bearings is minimised.
  • fan blades (6) are assembled properly to the fixing openings on the plate (3) through rivet claws (5) which the blades (6) have.
  • rivet claws (5) are punched from the other side. The height of the rivet claws (5) to be at a certain amount for these to originate no balance problem.
  • the upper plate of the fan is inserted over the blades through the rivet claws and the insulated fan is formed again by punching rivet claws (5).
  • Fan blades are located in a curved shape to guide air and water in the medium between lower and upper plates. The curved shape of the fan blades can be varied depending on the diameter and the efficiency of the fan.
  • Fan is assembled to the armature group by fastening the nut in the fan hub to the shaft end.
  • the upper portion of the fan hub is manufactured in a hexagonal form.
  • the nut is positioned during the moulding of the hub (2) as such to tighten when the shaft rotates.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Motor Or Generator Cooling System (AREA)

Abstract

This is an insulated fan obtained by placing using plastic insert moulding method an appropriate nut fitting motor shaft onto the hub of the fan body preferably of aluminium material to ensure insulation from inner parts of the motor as the fans of wet/dry vacuum cleaner apparels.

Description

INSULATED FAN
Hereby invention is concerned with ensuring electrical insulation of fans in contact with liquids in applications such as wet/dry vacuum cleaner apparels and alike, thus with preventing liquid leakage to motor and obtaining a less unbalanced motor structure.
In the known wet/dry vacuum cleaner motors, armature group and fan are assembled on the insulated shaft. In order to ensure presence of a double layer electrical insulation, slot insulation and further to that plastic injection over rotor shaft is needed. The outer diameter of the shaft fitted in the inner diameter of armature is to be held smaller owing to plastic injection. Reducing the diameter of the shaft further would, in turn, affect dynamic behaviour of armature. Especially, thinner shaft in compact motors would cause the armature having undesirable behaviours as regard to the rotor dynamics. Moreover insulating the shaft is costly and this is a disadvantage.
Unbalance of the fan assembly at the shaft end might be excessive. Moreover in the course of assembly of the fan, there is the concentricity problem and a result of that the balance of the motor sustains deterioration.
To solve the insulation problem, it has been considered using plastic fan instead of insulating the shaft. However, owing to plastic fan having strength problems at higher revolutions, no attempt has been made to put the same in operation at higher revolutions.
With the invention, it has been considered as objective to ascertain electrical insulation of the fan having contact with wet substances in applications such as wet/dry vacuum cleaners and to solve concentricity problems in the course of manufacturing. Figure 1 is the view before the insulated fan hub is formed.
Figure 2 is the view of the fan lower plate prepared by fan hub cast.
Figure 3 is the view as exploded of fan blades of the insulated fan lower plate and its connection to the upper plate.
Figure 4 is the three dimensional section view taken laterally of the insulated fan.
Figure 5 is three dimensional view from bottom of the insulated fan.
Figure 6 is the three dimensional view from the top of the insulated fan.
The numbering of the pieces which for the subject fan are as follows:
1) Fixing openings
2) Nut
3) Lower plate
4) Rivet holes
5) Rivet claws
6) Fan blades
7) Fan hub
8) Upper plate
9) Moisture proof set
Non-insulated fan is formed by joining lower plate (3), in the medium part of which fan hub (7) is formed through insert cast, to upper plate (8) using fan blades (6).
For insert moulding process, fixing openings are located (1) to hub portion of the lower aluminium plate. The position of the fixing openings (1) are to be symmetrical with respect to each other in order to ensure balance. The distances of the openings to the hub (1) are adjusted according to the varying diameter of the lower plate (3) with changing size of the motor. The number of the openings, may vary for the moulding on both surfaces, hold up each other strongly.
The nut (2) used for the assembly of the fan is attached to the shaft within the mould. The nut (2) is located in the mould such that it is concentric with the lower plate (3).The positioning of the nut (2) should be at optimum level. Plastic material flows through the fixing openings to the other side by the injection process. A concentric fan hub, in which a nut is located, is obtained on the lower plate. Forming the fan hub in this way (7) ensures the nut (2) being fixed to lower plate (3) with electrical insulation made there of.
A moisture proof set is formed (9) by provision of an outward slope of the edge which is formed by the moulding process on the lower surface of the lower plate (3) and away from the hub. The outer edge of the moisture proof set (9) is provided with a slope outwards to enable re-directing of the moisture coming from outside. In this way the effect of the moisture and detergents on the bearings is minimised.
The insulation thus ascertained through insulated fan which provides solution to the quality and balance problems arising due to insulating the shaft. Without insulating the shaft diameter will be thicker and this allows to step up higher speeds. Moreover the existence of a heavy and concentric moulding in which a nut is located, at the hub portion (7) of the insulated fan is effective in terms of ensuring a much more balanced rotation.
After the moulding of the hub at the centre of the lower plate (3) fan blades (6) are assembled properly to the fixing openings on the plate (3) through rivet claws (5) which the blades (6) have. To enable fixing of the blades (6), rivet claws (5) are punched from the other side. The height of the rivet claws (5) to be at a certain amount for these to originate no balance problem. Afterwards, the upper plate of the fan is inserted over the blades through the rivet claws and the insulated fan is formed again by punching rivet claws (5). Fan blades are located in a curved shape to guide air and water in the medium between lower and upper plates. The curved shape of the fan blades can be varied depending on the diameter and the efficiency of the fan.
Fan is assembled to the armature group by fastening the nut in the fan hub to the shaft end. To allow an easier assembly the upper portion of the fan hub is manufactured in a hexagonal form. The nut is positioned during the moulding of the hub (2) as such to tighten when the shaft rotates.

Claims

1. An insulated fan, comprising an upper plate (8), a lower plate (3) and fan blades (6) ensuring connection to each other of these both plates, having a concentric fan hub (7) in which a nut is located, characterised in that, in order to solve balance problems and to use non-insulated shafts, a nut fastened to the tip of a shaft as such that a portion of that nut remains over the upper face of the lower plate (3) whereas another portion there of below the same plate after this latter is positioned concentrically inside a mould, on which the plastic material is injected, where plastic penetrates from one face to the other through fixing openings (1) symmetrically located from each other at a specific distance from the centre, determined in accordance with the diameter the lower (3) and the upper plates (8) have, and cool down so as to form a centred fan hub (7) with nut therein.
2. An insulated fan as specified in claim 1 characterised in that, in order to prevent the moisture penetration to the motor section of moisture, a moisture proof set (9) is formed by placing vertical to lower plate (3) surface the outer diameter remote from the centre of the portion remaining on the lower surface of fan hub (7).
3. An insulated fan as specified in claims 1 and 2, characterised in that the said moisture proof set (9) is outwardly inclined preferably on its outer faces.
PCT/TR1999/000015 1999-03-23 1999-03-23 Insulated fan WO2000057064A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PCT/TR1999/000015 WO2000057064A1 (en) 1999-03-23 1999-03-23 Insulated fan
AU33525/99A AU3352599A (en) 1999-03-23 1999-03-23 Insulated fan
TR2001/02654T TR200102654T2 (en) 1999-03-23 1999-03-23 insulated fan

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/TR1999/000015 WO2000057064A1 (en) 1999-03-23 1999-03-23 Insulated fan

Publications (1)

Publication Number Publication Date
WO2000057064A1 true WO2000057064A1 (en) 2000-09-28

Family

ID=21621788

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/TR1999/000015 WO2000057064A1 (en) 1999-03-23 1999-03-23 Insulated fan

Country Status (3)

Country Link
AU (1) AU3352599A (en)
TR (1) TR200102654T2 (en)
WO (1) WO2000057064A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITTO20080960A1 (en) * 2008-12-22 2009-03-23 Fandis S P A FAN UNIT FOR FUME EXTRACTION, IN PARTICULAR FOR PELLET STOVE
ITTO20080702A1 (en) * 2008-09-24 2010-03-25 Fandis S P A FAN UNIT FOR FUME EXTRACTION, IN PARTICULAR FOR PELLET STOVE
EP2169236A1 (en) * 2008-09-24 2010-03-31 Fandis S.p.A. Fan assembly for extracting fumes, in particular for a pellet stove
WO2017061912A1 (en) * 2015-10-06 2017-04-13 Nordic Heater Ab Fan assembly comprising fan wheel with inlet and outlet of equal cross section area
EP2778428A3 (en) * 2013-03-11 2018-04-04 BSH Hausgeräte GmbH Mounting arrangement for a radial fan for a suction hood

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1628375B2 (en) * 1966-06-11 1976-10-07 Siemens AG, 1000 Berlin und 8000 München SHEET STEEL FAN WHEEL
EP0294308A1 (en) * 1987-06-05 1988-12-07 Bombas Electricas, S.A. (Boelsa) Bladed impellor for centrifugal pumps
DE3839860A1 (en) * 1987-11-27 1989-06-08 Gen Motors Corp INTEGRAL CONNECTION FOR A PLASTIC WATER PUMP WHEEL WHEEL
DE3632259C2 (en) * 1986-09-23 1995-11-23 Eaton Gmbh Method for producing a pump impeller for a coolant pump in a motor vehicle
WO1996018820A1 (en) * 1994-12-16 1996-06-20 Ksb Aktiengesellschaft Impeller fastening
JPH08247092A (en) * 1995-03-08 1996-09-24 Matsushita Electric Ind Co Ltd Motor driven blower

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1628375B2 (en) * 1966-06-11 1976-10-07 Siemens AG, 1000 Berlin und 8000 München SHEET STEEL FAN WHEEL
DE3632259C2 (en) * 1986-09-23 1995-11-23 Eaton Gmbh Method for producing a pump impeller for a coolant pump in a motor vehicle
EP0294308A1 (en) * 1987-06-05 1988-12-07 Bombas Electricas, S.A. (Boelsa) Bladed impellor for centrifugal pumps
DE3839860A1 (en) * 1987-11-27 1989-06-08 Gen Motors Corp INTEGRAL CONNECTION FOR A PLASTIC WATER PUMP WHEEL WHEEL
WO1996018820A1 (en) * 1994-12-16 1996-06-20 Ksb Aktiengesellschaft Impeller fastening
JPH08247092A (en) * 1995-03-08 1996-09-24 Matsushita Electric Ind Co Ltd Motor driven blower

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITTO20080702A1 (en) * 2008-09-24 2010-03-25 Fandis S P A FAN UNIT FOR FUME EXTRACTION, IN PARTICULAR FOR PELLET STOVE
EP2169236A1 (en) * 2008-09-24 2010-03-31 Fandis S.p.A. Fan assembly for extracting fumes, in particular for a pellet stove
ITTO20080960A1 (en) * 2008-12-22 2009-03-23 Fandis S P A FAN UNIT FOR FUME EXTRACTION, IN PARTICULAR FOR PELLET STOVE
EP2778428A3 (en) * 2013-03-11 2018-04-04 BSH Hausgeräte GmbH Mounting arrangement for a radial fan for a suction hood
WO2017061912A1 (en) * 2015-10-06 2017-04-13 Nordic Heater Ab Fan assembly comprising fan wheel with inlet and outlet of equal cross section area

Also Published As

Publication number Publication date
AU3352599A (en) 2000-10-09
TR200102654T2 (en) 2001-12-21

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