EP1249615A2 - Gebläserotor - Google Patents
Gebläserotor Download PDFInfo
- Publication number
- EP1249615A2 EP1249615A2 EP01130571A EP01130571A EP1249615A2 EP 1249615 A2 EP1249615 A2 EP 1249615A2 EP 01130571 A EP01130571 A EP 01130571A EP 01130571 A EP01130571 A EP 01130571A EP 1249615 A2 EP1249615 A2 EP 1249615A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- blower
- impellers
- characteristic
- blower according
- gas
- 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- Withdrawn
Links
Images
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
- F04D29/30—Vanes
-
- 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
- F04D17/164—Multi-stage fans, e.g. for vacuum cleaners
-
- 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
- F04D29/282—Rotors 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
-
- 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
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
- F04D29/444—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
- F04D29/66—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
- F04D29/666—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by means of rotor construction or layout, e.g. unequal distribution of blades or vanes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L5/00—Blast-producing apparatus before the fire
- F23L5/02—Arrangements of fans or blowers
Definitions
- the invention relates to a blower for a gas condensing boiler for supply the combustion air or the gas-air mixture for the burner in the Combustion chamber, the burner being followed by a heat exchanger which the exhaust gas is fed to an exhaust system.
- blower has multiple stages with impellers and one between successive impellers arranged, fixed stator is formed and a pressure-resistant Fan characteristic curve with great steepness, the impellers and / or Idlers with the smallest possible outer diameter and their blades are provided with a small blade exit angle.
- the blower Due to the at least two-stage design of the blower with a stator between the two impellers, a higher steepness of the blower characteristic is achieved, so that external disturbances, such as pressure pulsations, are practically negligible on the required volume flow and no longer exert any influence. As a result, the overall system of the gas condensing boiler is stabilized and unstable operating conditions are eliminated.
- the multi-stage blower designed in this way increases the working range with a fully premixed, blower-assisted burner, since the steep blower characteristic curve leads to significantly lower pressure pulsations due to malfunctions in the system and therefore enables more stable operation over the entire modulation range.
- the new blower has the advantages over the single-stage blower a lower noise level and a higher efficiency the air or gas-air mixture supply. Due to the changed flow guidance A higher kickback security is also guaranteed in the blower.
- the multi-stage design of the blower enables smaller impeller diameters with the same delivery volume, so that the blower in a compact design can be created.
- gas condensing boiler heaters can be used with larger ones Lengths of the exhaust pipes are operated in the exhaust system.
- the effort and the cost of the blower motor can be reduced because a lower, usable speed range is required.
- the existing pressure resistance of the blower also reduces the adjustment work on site when commissioning the gas condensing boiler.
- the blower characteristic curve shows the dependence of the specific delivery work ⁇ ptot / s on the delivery volume V, the delivery work being determined by the total delivery pressure ⁇ ptot, based on the density of the pumped medium (air or gas-air mixture).
- the steepness of the fan characteristic is due to the angle ⁇ between the fan characteristic and the entire system characteristic of the gas condensing boiler.
- the wheels on a common Drive shaft are rotatably applied.
- the blower characteristic curve can be additionally influence that the impellers on separate drive shafts are non-rotatable are applied and individually driven.
- the characteristic curves indicate the dependency of the specific conveying work ⁇ ptot on the density of the medium from the volume flow V again. Both characteristic curves intersect at operating point B and show that small fluctuations in the specific conveying work result in considerable changes in the volume flow V being conveyed.
- a blower according to the invention is designed and has at least two stages in a housing 10 two rotatably mounted on a drive shaft 13 Wheels 11 and 12 on. Between these two wheels 11 and 12 is a Stator 20 arranged fixed.
- the diameter of the wheels 11 and 12 is chosen with the design of the blades so that a steeper fan characteristic 4 is reached.
- the blade division plays in Circumferential direction and the width and / or length of the channels between the Shoveling a roll.
- the outside diameter Da der Impellers 11 and 12 reduced compared to a single-stage blower, so that the blower can be built as a compact unit.
- the blade exit angle is ⁇ defined by the angle between the tangent at the blade end and the circular tangent at the end of the bucket.
- the inflow of the volume flow is axially and the outflow radially, as the arrow bundles E and A show. It are all combinations of axial and radial inflow and outflow of the volume flow possible.
- the blower can do more than Have 2 stages, each between successive wheels a fixed idler is arranged.
- the wheels 11 and 12 can via a common drive shaft 13 in Rotational movements are offset. However, each of the wheels 11 and 12 can also rotatably attached to an individual drive shaft and therefore individual driven to optimize the blower characteristic.
- FIG. 3 shows the view of a stator 20 with curved blades 21.1 arranged on a disk 22; 21.2; 21.3; 21.4 .... 21.n, which are applied in the circumferential direction of the disk 22 in different pitches t1, t2, t3 and are also designed in different curvatures.
- different channels are formed between the blades, the lengths I1, 12, I3 of the blades 21.1 to 21.n and the divisions t1, t2, t3 also playing a role.
- Such a blade arrangement can also have the guide wheels 11 and 12. This allows Helmholtz resonators to be formed, which cancel out the characteristic frequencies of system-induced self-excited vibrations of the overall system.
- the impellers 11 and 12 can achieve the required volume flow.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Zudem wird mit dem so ausgelegten, mehrstufigen Gebläse der Arbeitsbereich bei vollvormischendem, gebläseunterstütztem Brenner vergrößert, da es aufgrund der steilen Gebläsekennlinie durch Störungen im System zu deutlich geringeren Druck-Pulsationen kommt und daher über dem gesamten Modulationsbereich ein stabilerer Betrieb ermöglicht wird.
- Fig. 1
- Gebläsekennlinie und Systemkennlinie beim Einsatz eines einstufigen Gebläses bei einer Gas-Brennwertkesseltherme,
- Fig. 2
- im Schnitt ein zweistufiges Gebläse mit einem zwischen den beiden Laufrädern angeordneten Leitrad,
- Fig. 3
- in schematischer Ansicht ein Leitrad und
- Fig. 4
- Gebläsekennlinie und Systemkennlinie eines Gebläses nach Fig. 2.
Eine derartige Schaufelanordnung können auch die Leiträder 11 und 12 aufweisen. Damit lassen sich Helmholtz-Resonatoren bilden, die charakteristische Frequenzen von systembedingten selbsterregten Schwingungen des Gesamtsystems auslöschen, zudem läßt sich bei kleinem Außendurchmesser Da der Laufräder 11 und 12 der geforderte Volumenstrom erreichen.
Claims (7)
- Gebläse für eine Gas-Brennwertkesseltherme zur Zuführung der Verbrennungsluft oder des Gas-Luftgemisches für den Brenner in der Brennkammer, wobei dem Brenner ein Wärmeüberträger nachgeordnet ist, durch den das Abgas geleitet einem Abgassystem zugeführt wird,
dadurch gekennzeichnet, dass das Gebläse mehrstufig mit Laufrädern (11, 12) und jeweils einem zwischen aufeinander folgenden Laufrädern (11, 12) angeordnetem, feststehendem Leitrad (20) ausgebildet ist und eine druckfeste Gebläsekennlinie (Δptot/= f(V) mit großer Steilheit (α) aufweist, wobei die Laufräder (11, 12) und/oder die Leiträder (20) mit möglichst kleinem Außendruckmesser (Da) und deren Schaufeln (21.1 bis 21.n) mit einem kleinen Schaufelaustrittswinkel (β) versehen sind. - Gebläse nach Anspruch 1 oder 2,
dadurch gekennzeichnet, dass die Steilheit (α) der Gebläsekennlinie durch den Winkel α zwischen der Gebläsekennlinie und der gesamten Systemkennlinie der Gas-Brennwertkesseltherme im Betriebspunkt (Schnittpunkt der beiden Kennlinien) definiert und möglichst groß ist. - Gebläse nach Anspruch 1,
dadurch gekennzeichnet, dass die Laufräder (11,12) auf einer gemeinsamen Antriebswelle (13) drehfest aufgebracht sind. - Gebläse nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet, dass die Laufräder (11, 12) auf getrennten Antriebswellen drehfest aufgebracht und individuell antreibbar sind. - Gebläse nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet, dass die Laufräder (11, 12) und/oder das Leitrad (20) mit Schaufeln (21.1 bis 21.n) unterschiedlicher Breite und/oder Länge (I1, I2, 13) in Umfangsrichtung in unterschiedlicher Teilung (t1, t2, t3) versehen und als Helmholtz-Resonatoren mit unterschiedlichen Resonanzfrequenzen ausgebildet sind. - Gebläse nach Anspruch 6,
dadurch gekennzeichnet, dass die Resonanzfrequenzen der Helmholtz-Resonatoren im Frequenzbereich der systembedingten, selbsterregten Schwingungen des Gesamtsystems der Gas-Brennwertkesseltherme gewählt sind.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10118336 | 2001-04-12 | ||
DE10118336.4A DE10118336B4 (de) | 2001-04-12 | 2001-04-12 | Gebläse für eine Gas-Brennwertkesseltherme |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1249615A2 true EP1249615A2 (de) | 2002-10-16 |
EP1249615A3 EP1249615A3 (de) | 2003-10-08 |
Family
ID=7681401
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01130571A Withdrawn EP1249615A3 (de) | 2001-04-12 | 2001-12-21 | Gebläserotor |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1249615A3 (de) |
DE (1) | DE10118336B4 (de) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2014925A1 (de) * | 2007-07-12 | 2009-01-14 | ABB Turbo Systems AG | Diffuser für Radialverdichter |
WO2010048905A1 (en) * | 2008-10-29 | 2010-05-06 | Vysoké Učení Technické V Brně | Impeller of hydraulic machines |
CN101922467A (zh) * | 2010-03-24 | 2010-12-22 | 南通大通宝富风机有限公司 | 离心鼓风机 |
US20180252237A1 (en) * | 2017-03-01 | 2018-09-06 | Cooler Master Co., Ltd. | Impeller |
CN109773635A (zh) * | 2013-07-12 | 2019-05-21 | 南京德朔实业有限公司 | 手持式砂光机 |
US20210254631A1 (en) * | 2020-02-17 | 2021-08-19 | Lg Electronics Inc. | Pump |
US20230032288A1 (en) * | 2020-01-23 | 2023-02-02 | Nuovo Pignone Tecnologie - S.R.L. | A return channel with non-constant return channel vanes pitch and centrifugal turbomachine including said return channel |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102019219914A1 (de) * | 2019-12-17 | 2021-06-17 | Ziehl-Abegg Se | Strömungsmaschine und Verfahren zum Erfassen des Abströmwinkels bei Strömungsmaschinen |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1672986A (en) * | 1922-04-17 | 1928-06-12 | Garnet W Mckee | Multistage blower |
GB652337A (en) * | 1947-11-07 | 1951-04-18 | Electrolux Ltd | Improvements in or relating to centrifugal fans |
GB1125075A (en) * | 1967-04-12 | 1968-08-28 | Svenska Luftfilter Ab | Improvements in or relating to air supply fan units for oil burners and other devices |
DE1813335A1 (de) * | 1967-12-11 | 1969-07-24 | Gutehoffnungshuette Sterkrade | Turboverdichter |
GB1293553A (en) * | 1969-02-18 | 1972-10-18 | Cav Ltd | Radial flow fans |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5817358B2 (ja) * | 1978-03-07 | 1983-04-06 | 川崎重工業株式会社 | 多段タ−ボ形圧縮機 |
JPS60122814A (ja) * | 1983-12-08 | 1985-07-01 | Matsushita Electric Ind Co Ltd | 燃焼器の給気装置 |
DE3842697A1 (de) * | 1988-12-19 | 1990-06-21 | Standard Elektrik Lorenz Ag | Hochdruck-geblaese |
DE19629220B4 (de) * | 1996-07-19 | 2005-05-12 | Motoren Ventilatoren Landshut Gmbh | Hochdruck-Gebläse |
-
2001
- 2001-04-12 DE DE10118336.4A patent/DE10118336B4/de not_active Expired - Fee Related
- 2001-12-21 EP EP01130571A patent/EP1249615A3/de not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1672986A (en) * | 1922-04-17 | 1928-06-12 | Garnet W Mckee | Multistage blower |
GB652337A (en) * | 1947-11-07 | 1951-04-18 | Electrolux Ltd | Improvements in or relating to centrifugal fans |
GB1125075A (en) * | 1967-04-12 | 1968-08-28 | Svenska Luftfilter Ab | Improvements in or relating to air supply fan units for oil burners and other devices |
DE1813335A1 (de) * | 1967-12-11 | 1969-07-24 | Gutehoffnungshuette Sterkrade | Turboverdichter |
GB1293553A (en) * | 1969-02-18 | 1972-10-18 | Cav Ltd | Radial flow fans |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 009, no. 279 (M-427), 7. November 1985 (1985-11-07) & JP 60 122814 A (MATSUSHITA DENKI SANGYO KK), 1. Juli 1985 (1985-07-01) * |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2014925A1 (de) * | 2007-07-12 | 2009-01-14 | ABB Turbo Systems AG | Diffuser für Radialverdichter |
US7845900B2 (en) | 2007-07-12 | 2010-12-07 | Abb Turbo Systems Ag | Diffuser for centrifugal compressor |
WO2010048905A1 (en) * | 2008-10-29 | 2010-05-06 | Vysoké Učení Technické V Brně | Impeller of hydraulic machines |
CN101922467A (zh) * | 2010-03-24 | 2010-12-22 | 南通大通宝富风机有限公司 | 离心鼓风机 |
CN101922467B (zh) * | 2010-03-24 | 2012-01-11 | 南通大通宝富风机有限公司 | 离心鼓风机 |
CN109773635A (zh) * | 2013-07-12 | 2019-05-21 | 南京德朔实业有限公司 | 手持式砂光机 |
US20180252237A1 (en) * | 2017-03-01 | 2018-09-06 | Cooler Master Co., Ltd. | Impeller |
US20230032288A1 (en) * | 2020-01-23 | 2023-02-02 | Nuovo Pignone Tecnologie - S.R.L. | A return channel with non-constant return channel vanes pitch and centrifugal turbomachine including said return channel |
US20210254631A1 (en) * | 2020-02-17 | 2021-08-19 | Lg Electronics Inc. | Pump |
US11661953B2 (en) * | 2020-02-17 | 2023-05-30 | Lg Electronics Inc. | Pump |
Also Published As
Publication number | Publication date |
---|---|
DE10118336A1 (de) | 2002-10-24 |
DE10118336B4 (de) | 2016-03-24 |
EP1249615A3 (de) | 2003-10-08 |
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