EP0922862A2 - Ventilateur axial pour systèmes de ventilation - Google Patents

Ventilateur axial pour systèmes de ventilation Download PDF

Info

Publication number
EP0922862A2
EP0922862A2 EP98122961A EP98122961A EP0922862A2 EP 0922862 A2 EP0922862 A2 EP 0922862A2 EP 98122961 A EP98122961 A EP 98122961A EP 98122961 A EP98122961 A EP 98122961A EP 0922862 A2 EP0922862 A2 EP 0922862A2
Authority
EP
European Patent Office
Prior art keywords
insert ring
axial fan
impeller
blades
housing
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.)
Granted
Application number
EP98122961A
Other languages
German (de)
English (en)
Other versions
EP0922862A3 (fr
EP0922862B1 (fr
Inventor
Volker Fröhlich
Frank Wahl
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.)
TLT Turbo GmbH
Original Assignee
Turbo-Lufttechnik GmbH
Turbo Lufttechnik GmbH
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 Turbo-Lufttechnik GmbH, Turbo Lufttechnik GmbH filed Critical Turbo-Lufttechnik GmbH
Publication of EP0922862A2 publication Critical patent/EP0922862A2/fr
Publication of EP0922862A3 publication Critical patent/EP0922862A3/fr
Application granted granted Critical
Publication of EP0922862B1 publication Critical patent/EP0922862B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/08—Sealings
    • F04D29/16—Sealings between pressure and suction sides
    • F04D29/161—Sealings between pressure and suction sides especially adapted for elastic fluid pumps
    • F04D29/164—Sealings between pressure and suction sides especially adapted for elastic fluid pumps of an axial flow wheel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D19/00—Axial-flow pumps
    • F04D19/002—Axial flow 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
    • 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/522—Casings; Connections of working fluid for axial pumps especially adapted for elastic fluid pumps
    • F04D29/526—Details of the casing section radially opposing blade tips
    • 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
    • F05D2300/50—Intrinsic material properties or characteristics
    • F05D2300/502—Thermal properties

Definitions

  • the invention relates to an axial fan for Ventilation systems for the combined ventilation and Smoke extraction company with the features of the generic term of Claim 1.
  • Axial fans are used in ventilation technology for both ventilation and smoke extraction in Fire must be suitable.
  • One is with axial fans strives to leave a small impeller gap between the Bucket tips and the inner wall of the housing to be observed optimal values in terms of acoustics, aerodynamics Behavior, the efficiency and the vibration behavior of the Achieve axial fan.
  • Fire temperature must withstand far above normal Room temperature. Stretches under these operating conditions the impeller and the housing are different. Here the case may occur that the impeller expands so far that it brushes against the housing. It is essential to prevent this.
  • the invention has for its object the generic To design axial fan so that a combined ventilation and Smoke extraction operation of the axial fan in each case optimal conditions is possible.
  • the arrangement of the insert ring allows the Impeller gap to be set between the ventilation case Flow tips and the insert ring fluidically lay out correctly so that the axial fan in this Operating case runs optimally.
  • the insert ring is replaced by the Blade tips rubbed off. This brings the Impeller gap between the now enlarged impeller diameter and the reduced thickness of the insert ring on the bottom these operating conditions are the correct flow values on. This means that the axial fan also gets under in the event of a fire optimal conditions.
  • the axial fan shown is used for ventilation of Structures and is for combined ventilation and Smoke extraction suitable.
  • the axial fan contains a Housing 1, which is provided with two connecting flanges 2.
  • In the housing 1 is an impeller 3 and a motor pot 4th arranged.
  • the motor pot 4 takes a motor 5 for the drive of the impeller 3.
  • the impeller 3 consists of a Motor 5 driven shaft 6, from a hub 7 and out in the Hub 7 arranged, preferably adjustable blades 8th.
  • annular Flow channel 9 Between the housing 1 on the one hand and the motor pot 4 and the Hub 7 of the impeller 3, on the other hand, is annular Flow channel 9 through which the pumped medium in the direction of Arrows 10 is promoted. Downstream from the blades 8 are fixed guide vanes 11 in the flow channel 9 arranged.
  • an insert ring 12 is used, which is on the inside of the Housing 1 is attached.
  • This insert ring 12 consists of a material that is used in normal operation, i.e. for ventilation of rooms with promotion of indoor air, wear-resistant and at least briefly during a one-off Smoke extraction is heat-resistant.
  • the distance of the peaks the blades 8 from the inner wall of the housing 1 0.2 to 2%, and the distance between the tips of the blades 8 from the inside of the insert ring 12 is 0.0 to 0.5% of the impeller diameter.
  • the impeller gap is designed to be fluidly correct.
  • the axial fan should remove smoke and fire gases from Promote elevated temperature.
  • the material of the insert ring 12 is now chosen so that it is mechanical compared to the material the impeller 3 with mutual friction stress between Impeller 3 and insert ring 12 are wearing. Since that Impeller 3 under the influence of the elevated temperature of the Pumped medium expands and thereby increases in diameter now the tips of the blades 8 the insert ring 12 rub without coming into contact with the housing 1.
  • the thickness of the insert ring 12 should be chosen so that the Never touch the blades 8 on the housing 1.
  • FIGS. 4 and 5 The mode of operation of the insert ring 12 is shown in FIGS. 4 and 5 shown clearly.
  • Fig. 4 the axial fan is in its original form, as it was for the Ventilation operation comes into question.
  • Fig. 5 shows that the Diameter of the impeller 3 due to the increased The temperature of the hot smoke and combustion gases has increased.
  • the Tips of the blades 8 have a part of the insert ring 12 rubbed, so that in turn an impeller gap of less Height between the impeller 3 and the now changed insert ring 12 exists.
  • the front edge plane of the insert ring 12 is smooth and stands at an angle of 90 ° to the axis of the shaft 6 of the impeller 3.
  • the insert ring 12 is the largest possible Bucket setting angle as flush as possible Impeller entry level 13 installed to ensure a flawless To ensure flow against the impeller 3. With smaller ones
  • the blade leading angle is the front edge of the blade slightly above. If the insert ring 12 is not flush with Front edge of the blades 8 placed and is on the On the inflow side, in the event of a fire, it becomes the front Protruding area not sanded. This allows it to go through a bad flow against the expanded impeller 3 come to a stall. The impeller 3 then runs in one Bead that looks like a wheel gap that is too large. A little However, the insert ring 12 protrudes by a few mm harmless.
  • the insert ring 12 extends at least over that of the Blades 8 coated area. He can also use the Trailing edge of the blades 8 out to the rear Edge of the hub 7 or reach up to the guide vanes 11.
  • the Trailing edge of the insert ring 12 can be just like that Leading edge be smooth or tapered in diameter Run in housing 1.
  • the material used for the insert ring 12 is flexible and consists preferably of fiber mats, which as webs to the Round shape of the housing 1 can be adjusted.
  • the insert ring 12 can consist of one or more layers 14 one above the other be built, glued to the inner wall of the housing 1 or be fastened with the aid of rivets 15. These rivets 15 are in smoke extraction mode by the blades 8 rubbed together with the insert ring 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
EP98122961A 1997-12-13 1998-12-03 Ventilateur axial pour systèmes de ventilation Expired - Lifetime EP0922862B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19755615A DE19755615A1 (de) 1997-12-13 1997-12-13 Axialventilator für Lüftungsanlagen
DE19755615 1997-12-13

Publications (3)

Publication Number Publication Date
EP0922862A2 true EP0922862A2 (fr) 1999-06-16
EP0922862A3 EP0922862A3 (fr) 2000-04-12
EP0922862B1 EP0922862B1 (fr) 2003-07-16

Family

ID=7851917

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98122961A Expired - Lifetime EP0922862B1 (fr) 1997-12-13 1998-12-03 Ventilateur axial pour systèmes de ventilation

Country Status (3)

Country Link
EP (1) EP0922862B1 (fr)
AT (1) ATE245255T1 (fr)
DE (2) DE19755615A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202015104163U1 (de) 2015-08-07 2016-11-10 Systemair GmbH Rotorflügel für einen Axialventilator

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB851267A (en) * 1958-04-28 1960-10-12 Gen Motors Corp Improvements relating to axial-flow compressors
GB879740A (en) * 1959-01-02 1961-10-11 Axia Fans Ltd Apparatus for expurging an enclosed space of gaseous media fouling the atmosphere therein
DE4423447A1 (de) * 1994-07-05 1996-01-11 Turbo Lufttechnik Gmbh Axialventilator
DE4439726A1 (de) * 1994-11-09 1996-05-15 Siemens Ag Laufrad für eine Strömungsmaschine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Also Published As

Publication number Publication date
ATE245255T1 (de) 2003-08-15
DE19755615A1 (de) 1999-06-17
EP0922862A3 (fr) 2000-04-12
EP0922862B1 (fr) 2003-07-16
DE59809019D1 (de) 2003-08-21

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