FR2241211A5 - Centrifugal blower enclosed rotor - has holes in lines parallel to discharge tip edges of blades - Google Patents

Centrifugal blower enclosed rotor - has holes in lines parallel to discharge tip edges of blades

Info

Publication number
FR2241211A5
FR2241211A5 FR7330221A FR7330221A FR2241211A5 FR 2241211 A5 FR2241211 A5 FR 2241211A5 FR 7330221 A FR7330221 A FR 7330221A FR 7330221 A FR7330221 A FR 7330221A FR 2241211 A5 FR2241211 A5 FR 2241211A5
Authority
FR
France
Prior art keywords
holes
blades
discharge tip
line
centrifugal blower
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.)
Expired
Application number
FR7330221A
Other languages
French (fr)
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.)
Neu SA
Original Assignee
Neu SA
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 Neu SA filed Critical Neu SA
Priority to FR7330221A priority Critical patent/FR2241211A5/en
Application granted granted Critical
Publication of FR2241211A5 publication Critical patent/FR2241211A5/en
Expired 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
    • 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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/68—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers
    • F04D29/681—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers especially adapted for elastic fluid pumps
    • F04D29/682—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers especially adapted for elastic fluid pumps by fluid extraction
    • 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
    • F04D29/68—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers
    • F04D29/681—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers especially adapted for elastic fluid pumps
    • F04D29/684—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers especially adapted for elastic fluid pumps by fluid injection
    • 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
    • F05D2240/00—Components
    • F05D2240/20—Rotors
    • F05D2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
    • F05D2240/303—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor related to the leading edge of a rotor blade
    • 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
    • F05D2240/00—Components
    • F05D2240/20—Rotors
    • F05D2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
    • F05D2240/304—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor related to the trailing edge of a rotor blade

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The system allows elimination of the double speed and detachment zones on centrifugal blowers with blades inclined backwards. The blades (5) each have a series of holes (15) formed in them in a line running close to the discharge tip (11). A second row of holes (13) can also be provided along a line parallel to the inlet edge. The invention is particularly for delivering hot gases into a chimney, and avoids the generation of vibration in the conduit etc. The sum of the diameters of the circular holes (15) at the tip is typically between one half and one quarter of the length of the line on which they lie. A similar figure for the circular holes (13) is typically a quarter of the length of line (12).
FR7330221A 1973-08-14 1973-08-14 Centrifugal blower enclosed rotor - has holes in lines parallel to discharge tip edges of blades Expired FR2241211A5 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7330221A FR2241211A5 (en) 1973-08-14 1973-08-14 Centrifugal blower enclosed rotor - has holes in lines parallel to discharge tip edges of blades

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7330221A FR2241211A5 (en) 1973-08-14 1973-08-14 Centrifugal blower enclosed rotor - has holes in lines parallel to discharge tip edges of blades

Publications (1)

Publication Number Publication Date
FR2241211A5 true FR2241211A5 (en) 1975-03-14

Family

ID=9124120

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7330221A Expired FR2241211A5 (en) 1973-08-14 1973-08-14 Centrifugal blower enclosed rotor - has holes in lines parallel to discharge tip edges of blades

Country Status (1)

Country Link
FR (1) FR2241211A5 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2403474A1 (en) * 1977-09-14 1979-04-13 Sulzer Ag CENTRIFUGAL PUMP
FR2851857A1 (en) * 2003-02-27 2004-09-03 Valeo Equip Electr Moteur Improved cooling fan for rotating electrical machine used in motor vehicles, uses holes passing through blades to reduce air flow separation and recirculation
US6802693B2 (en) * 1999-05-21 2004-10-12 Vortex Holding Company Vortex attractor with vanes attached to containing ring and backplate
EP2378131A1 (en) * 2008-12-19 2011-10-19 Changzhou Xiangming Electromotor Co., Ltd Impeller of blower
CN109779969A (en) * 2019-02-27 2019-05-21 华帝股份有限公司 Impeller, fan and range hood with supercharging device
EP3536138A1 (en) * 2018-03-09 2019-09-11 TTI (Macao Commercial Offshore) Limited Blower attachment for a trimmer head

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2403474A1 (en) * 1977-09-14 1979-04-13 Sulzer Ag CENTRIFUGAL PUMP
US6802693B2 (en) * 1999-05-21 2004-10-12 Vortex Holding Company Vortex attractor with vanes attached to containing ring and backplate
FR2851857A1 (en) * 2003-02-27 2004-09-03 Valeo Equip Electr Moteur Improved cooling fan for rotating electrical machine used in motor vehicles, uses holes passing through blades to reduce air flow separation and recirculation
EP2378131A1 (en) * 2008-12-19 2011-10-19 Changzhou Xiangming Electromotor Co., Ltd Impeller of blower
EP2378131A4 (en) * 2008-12-19 2014-11-05 Changzhou Xiangming Electromotor Co Ltd Impeller of blower
EP3536138A1 (en) * 2018-03-09 2019-09-11 TTI (Macao Commercial Offshore) Limited Blower attachment for a trimmer head
CN110235594A (en) * 2018-03-09 2019-09-17 创科（澳门离岸商业服务）有限公司 Air blast attachment for trimmer head
CN109779969A (en) * 2019-02-27 2019-05-21 华帝股份有限公司 Impeller, fan and range hood with supercharging device
CN109779969B (en) * 2019-02-27 2024-03-15 华帝股份有限公司 Impeller with supercharging device, fan and range hood

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Legal Events

Date Code Title Description
ST Notification of lapse