GB1421573A - Arrangement for regulating medium flow especially the flow of air of a radial flow fan - Google Patents

Arrangement for regulating medium flow especially the flow of air of a radial flow fan

Info

Publication number
GB1421573A
GB1421573A GB795773A GB795773A GB1421573A GB 1421573 A GB1421573 A GB 1421573A GB 795773 A GB795773 A GB 795773A GB 795773 A GB795773 A GB 795773A GB 1421573 A GB1421573 A GB 1421573A
Authority
GB
United Kingdom
Prior art keywords
flow
impeller
ring
length
axial length
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
GB795773A
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.)
Svenska Flaktfabriken AB
Original Assignee
Svenska Flaktfabriken AB
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 Svenska Flaktfabriken AB filed Critical Svenska Flaktfabriken AB
Publication of GB1421573A publication Critical patent/GB1421573A/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
    • F04D29/40—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
    • F04D29/46—Fluid-guiding means, e.g. diffusers adjustable
    • F04D29/462—Fluid-guiding means, e.g. diffusers adjustable especially adapted for elastic fluid pumps
    • F04D29/464—Fluid-guiding means, e.g. diffusers adjustable especially adapted for elastic fluid pumps adjusting flow cross-section, otherwise than by using adjustable stator blades
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/003—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by throttling
    • 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
    • F05D2250/00—Geometry
    • F05D2250/50—Inlet or outlet
    • F05D2250/51—Inlet

Landscapes

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

Abstract

1421573 Centrifugal fans SVENSKA FLAKTFABRIKEN AB 19 Feb 1973 [25 Feb 1972] 7957/73 Heading F1C The flow through a fan or other device for generating a flow of medium is regulated by means of a cylindrical ring freely inserted within and in contact with the device and rotatable therewith, the ring being shorter in axial length than the device and variable in length or position to effect the regulation of flow. In the fan shown in Fig. 2, a variable part of the axial length of the impeller 5 can be blanked off by means of a telescopic ring 13 attached to the impeller back plate 6. In another embodiment, a ring cut to the desired axial length or selected from a number of rings of different length, or a number of rings put together to aggregate the required length, can be placed within the impeller abutment with the back plate 6. The rings may additionally vary in radial thickness. A single ring of fixed axial length equal to 20-50% of the impeller length may be placed within the impeller in a desired axial position, the reduction of flow obtained being greater when the ring is adjacent the impeller eye 7 than when it is adjacent the back plate 6.
GB795773A 1972-02-25 1973-02-19 Arrangement for regulating medium flow especially the flow of air of a radial flow fan Expired GB1421573A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE02335/72A SE361710B (en) 1972-02-25 1972-02-25

Publications (1)

Publication Number Publication Date
GB1421573A true GB1421573A (en) 1976-01-21

Family

ID=20259778

Family Applications (1)

Application Number Title Priority Date Filing Date
GB795773A Expired GB1421573A (en) 1972-02-25 1973-02-19 Arrangement for regulating medium flow especially the flow of air of a radial flow fan

Country Status (11)

Country Link
US (1) US3861824A (en)
AU (1) AU469344B2 (en)
BE (1) BE795886A (en)
DE (1) DE2307329C3 (en)
DK (1) DK138515B (en)
FI (1) FI56058C (en)
FR (1) FR2173573A5 (en)
GB (1) GB1421573A (en)
IT (1) IT979366B (en)
NO (1) NO142822C (en)
SE (1) SE361710B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4859140A (en) * 1985-01-25 1989-08-22 Brod & Mcclung - Pace Co. Centrifugal fan
US5161941A (en) * 1990-08-28 1992-11-10 Sinko Kogyo, Co, Ltd. Actuator assembly for controlling inlet air flow to centrifugal fans
US5392846A (en) * 1992-11-09 1995-02-28 Gardner; Ernest A. Heat/cooling system and apparatus
US5827044A (en) * 1997-03-26 1998-10-27 Yazici; Muammer Fan system with variable air volume control

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1053154A (en) * 1912-02-20 1913-02-18 Creamery Package Mfg Co Centrifugal fan.
DE364732C (en) * 1922-01-24 1922-12-01 Oskar Florian Control for centrifugal fan
US1556771A (en) * 1923-07-13 1925-10-13 Benjamin F Dupont Root cutter
US1834959A (en) * 1929-02-14 1931-12-08 Comb Eer Inc Blower
US1846379A (en) * 1929-03-29 1932-02-23 American Blower Corp Apparatus and method of controlling fans
US2078580A (en) * 1936-04-10 1937-04-27 Loyal C Moore Smoke exhauster
US2430225A (en) * 1944-11-18 1947-11-04 Nat Southern Products Corp Ventilating unit
US2542121A (en) * 1947-09-09 1951-02-20 Eureka Williams Corp Motor compressor unit
DE1106918B (en) * 1955-01-19 1961-05-18 Bruno Eck Dr Ing Radial fan runner
FR1435094A (en) * 1965-03-02 1966-04-15 Improvements to fans or centrifugal pumps with adjustable flow
DE1628369B1 (en) * 1967-10-25 1971-02-04 Rheinstahl Henschel Ag Radial fan or pump with two or more blade rings

Also Published As

Publication number Publication date
AU469344B2 (en) 1976-02-12
FR2173573A5 (en) 1973-10-05
AU5221273A (en) 1974-08-15
SE361710B (en) 1973-11-12
NO142822B (en) 1980-07-14
IT979366B (en) 1974-09-30
NO142822C (en) 1980-10-22
DE2307329A1 (en) 1973-09-06
US3861824A (en) 1975-01-21
DK138515B (en) 1978-09-18
BE795886A (en) 1973-06-18
DK138515C (en) 1979-02-26
FI56058C (en) 1979-11-12
DE2307329C3 (en) 1981-06-11
DE2307329B2 (en) 1980-09-04
FI56058B (en) 1979-07-31

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee