WO1991001450A1 - Radial-flow fan unit fitted inside an air-intake duct - Google Patents
Radial-flow fan unit fitted inside an air-intake duct Download PDFInfo
- Publication number
- WO1991001450A1 WO1991001450A1 PCT/DE1990/000521 DE9000521W WO9101450A1 WO 1991001450 A1 WO1991001450 A1 WO 1991001450A1 DE 9000521 W DE9000521 W DE 9000521W WO 9101450 A1 WO9101450 A1 WO 9101450A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- air
- fan unit
- intake duct
- impeller
- air intake
- Prior art date
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
- F04D29/288—Part of the wheel having an ejecting effect, e.g. being bladeless diffuser
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
- F04D17/16—Centrifugal pumps for displacing without appreciable compression
- F04D17/165—Axial entry and discharge
Definitions
- the invention relates to a radial fan unit according to the preamble of claim 1.
- a diagonal fan with a diagonally flowed impeller and a stator downstream of the impeller in the flow direction is known.
- the guide wheel is embodied by two air guide rings forming an annular extension, and blades are arranged in the annular extension, which are attached to the air guide rings by means of tabs.
- the invention has for its object to provide a fan unit of the generic type with a minimum
- This solution also enables the fan unit to be designed as a compact unit that can be quickly removed and replaced.
- FIG. 1 shows a view of the fan unit installed in the air intake duct
- FIG. 2 shows a view of the fan unit corresponding to FIG. 1, but in a sound-absorbing design and with the suction nozzle combined with the impeller cover,
- FIG. 3 is a perspective view of an air flow channel provided with a side attachment against the blow-out direction
- Fig. 4 is a view of the flow channel according to
- FIGS. 3 and 4 shows a perspective view of the air duct according to FIGS. 3 and 4 with the fan unit inserted
- FIG. 6 is a view of a modified fan unit, partly in section,
- FIG. 7 is a view of a Ventilggghomouses with window-like openings made in the housing wall
- Fig. 8 is a view of the blade side of the impeller.
- the fan unit 9 is arranged inside a cylindrical air intake duct or support tube 10 and on the upstream side by a
- Covered 11 which has a central opening 12 and is clamped, for example by means of flanges 13, 14.
- a suction nozzle 15 or a nozzle socket is fixedly attached to the diaphragm 11 and opens into the nozzle-shaped opening 16 in the rotating impeller cover 17 without contact.
- the impeller bottom 18 is by means of
- Impeller 22 Flanged screws 19 to the shaft 20 of the drive motor 21.
- the blades of the wing or. Impeller 22 are indicated by dashed lines and designated 22 '.
- the approach 23 can be an integral part of the impeller bottom 18 or attached to it.
- the drive motor 21 is arranged on a support plate 26 which is provided with air passage openings 27 which are preferably designed as slots running in the circumferential direction.
- a hollow cylinder 28 is combined, which extends in the axial direction and is held on a multi-part support star 29.
- the support star 29, which can be in one piece with the hollow cylinder 28, can be placed on a segment-shaped support which is fixedly attached to the inner wall of the air intake duct or support tube 10 and can be connected to the latter by means of screws or other suitable fastening elements.
- the complete fan unit can thus be removed from the carrier 30 after the fastening screws have been loosened and removed from the air intake duct 10.
- Vacuum causes an effective air flow, which sweeps over the drive motor 21 and passes through the air passage openings 27 to the zone 31, and which passes into the exhaust gas flow. With good engine cooling, this ensures problem-free dissipation of the engine heat.
- the inner wall of the air intake duct 10 is covered with a sound-absorbing material 32, and sound-absorbing material is also applied to the outer wall of the hollow cylinder 28.
- the two layers 32 and 33 of sound-absorbing material expediently close approximately flush with the flow channel piece 25 and adjoin the underside of the carrier 30 at the top.
- the layer of sound-absorbing material arranged on the inside of the air intake duct 10, as can be seen in FIG. 2, can also be advanced to the diaphragm 11 and can extend in the radial direction up to the intake nozzle 15, which is part of the impeller cover 17 and rotates with it , extend.
- the fan unit 9 can be based on the outlet cross section of the gas or. Air flow channel 10 is arranged eccentrically and the shape of the outlet cross section can be selected to be rectangular or similar.
- FIGS. 3 and 4 show an air flow channel which has a backpack-shaped attachment 36, in which a trough-shaped depression with an approximately rectangular blow-out cross section 38 is formed.
- the depression 37 is in flow connection with this channel via openings 39 in the wall of the flow channel 10.
- FIG. 5 shows the complete fan unit inserted in the receiving space 40 of the air intake duct 10, the hollow cylinder 28 of which is clad with sound-absorbing material 33, which is covered by a grille 41 made of sheet metal or plastic.
- the support star 29, which leaves the axial flow path of the air or clean gas stream open can be replaced by a ring 42, which covers the air flow duct 10 axially.
- the air guide ring 24 is designed as a separate component which is attached to the wall of the air intake duct or support tube 10, for example by means of screws 43 or the like, detachable holding elements in a simple, exchangeable manner.
- the fixed arrangement of the air guide ring 24 is particularly useful when very high peripheral speeds are required at high fan pressures.
- Such changes in air volume occur, for example, when the frequency or the total pressure in the system changes.
- a sound-absorbing lining 32 is provided, which is dimensioned and expanded according to the respective need.
- window-like openings 38 are made in the wall of the air intake duct or support tube 10 (fan housing). For fluidic reasons, these have a positive effect on noise reduction.
- any number of fan units can be located in a common outside tube 44 can be accommodated. As a result, an arbitrarily high pressure can be generated with a predetermined amount of air.
- impeller 22 is provided with eight blades 22 ′. The respective number of blades 22 'depends on the given conditions.
Abstract
Description
Claims
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3923874A DE3923874A1 (en) | 1989-07-19 | 1989-07-19 | Ventilator with motor driven bladed wheel - involves formation of axial flow channel to improve performance |
DEP3923874.1 | 1989-07-19 | ||
DE4020236A DE4020236A1 (en) | 1990-06-26 | 1990-06-26 | Radial-flow fan within air suction duct |
DEP4020236.4 | 1990-06-26 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1991001450A1 true WO1991001450A1 (en) | 1991-02-07 |
Family
ID=25883197
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1990/000521 WO1991001450A1 (en) | 1989-07-19 | 1990-07-11 | Radial-flow fan unit fitted inside an air-intake duct |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0435987A1 (en) |
AU (1) | AU5958290A (en) |
WO (1) | WO1991001450A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0651161A1 (en) * | 1993-11-02 | 1995-05-03 | Aktiebolaget Electrolux | Device for cooling en electric motor for a turbo-fan |
AU671157B2 (en) * | 1992-10-01 | 1996-08-15 | Abb Flakt Ab | Inlet bell for centrifugal fans |
AU705065B2 (en) * | 1995-02-10 | 1999-05-13 | Jetfan Technology Limited | An air movement apparatus |
GB2503270A (en) * | 2012-06-21 | 2013-12-25 | Elta Fans Ltd | Centrifugal ventilation fan |
US10575683B2 (en) | 2017-03-15 | 2020-03-03 | Spectrum Brands, Inc. | Quiet appliance motor housing |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AUPN102795A0 (en) * | 1995-02-10 | 1995-03-09 | Magiview Pty Ltd | Circulation control fan |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB212123A (en) * | 1923-03-14 | 1924-03-06 | American Blower Co | Improvements in centrifugal fans |
CH213309A (en) * | 1939-10-20 | 1941-01-31 | Wetter Wilhelm | Fan. |
FR1155080A (en) * | 1956-07-24 | 1958-04-22 | Normacem Sa | Improvement in machine ventilation |
GB1085565A (en) * | 1963-06-27 | 1967-10-04 | Colchester Woods | Mixed flow fans |
DE2403471A1 (en) * | 1974-01-25 | 1975-07-31 | Lwk Luft Waerme Klimatechnik G | Radial fan ventilation appts. - has deflecting hood around fan wheel and axial guide lamellae at hood outlet |
-
1990
- 1990-07-11 EP EP90910593A patent/EP0435987A1/en not_active Ceased
- 1990-07-11 AU AU59582/90A patent/AU5958290A/en not_active Abandoned
- 1990-07-11 WO PCT/DE1990/000521 patent/WO1991001450A1/en not_active Application Discontinuation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB212123A (en) * | 1923-03-14 | 1924-03-06 | American Blower Co | Improvements in centrifugal fans |
CH213309A (en) * | 1939-10-20 | 1941-01-31 | Wetter Wilhelm | Fan. |
FR1155080A (en) * | 1956-07-24 | 1958-04-22 | Normacem Sa | Improvement in machine ventilation |
GB1085565A (en) * | 1963-06-27 | 1967-10-04 | Colchester Woods | Mixed flow fans |
DE2403471A1 (en) * | 1974-01-25 | 1975-07-31 | Lwk Luft Waerme Klimatechnik G | Radial fan ventilation appts. - has deflecting hood around fan wheel and axial guide lamellae at hood outlet |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU671157B2 (en) * | 1992-10-01 | 1996-08-15 | Abb Flakt Ab | Inlet bell for centrifugal fans |
EP0651161A1 (en) * | 1993-11-02 | 1995-05-03 | Aktiebolaget Electrolux | Device for cooling en electric motor for a turbo-fan |
AU705065B2 (en) * | 1995-02-10 | 1999-05-13 | Jetfan Technology Limited | An air movement apparatus |
GB2503270A (en) * | 2012-06-21 | 2013-12-25 | Elta Fans Ltd | Centrifugal ventilation fan |
GB2503270B (en) * | 2012-06-21 | 2014-05-28 | Elta Fans Ltd | Ventilation fan |
US10575683B2 (en) | 2017-03-15 | 2020-03-03 | Spectrum Brands, Inc. | Quiet appliance motor housing |
Also Published As
Publication number | Publication date |
---|---|
EP0435987A1 (en) | 1991-07-10 |
AU5958290A (en) | 1991-02-22 |
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