GB1431680A - Fan impellers - Google Patents

Fan impellers

Info

Publication number
GB1431680A
GB1431680A GB3500775A GB3500775A GB1431680A GB 1431680 A GB1431680 A GB 1431680A GB 3500775 A GB3500775 A GB 3500775A GB 3500775 A GB3500775 A GB 3500775A GB 1431680 A GB1431680 A GB 1431680A
Authority
GB
United Kingdom
Prior art keywords
slot
blade
crease
edge
disc
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
GB3500775A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB1431680A publication Critical patent/GB1431680A/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
    • 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
    • F04D29/283—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 rotors of the squirrel-cage type

Landscapes

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

Abstract

1431680 Making fan impellers K O L WALLMAN 10 April 1973 [12 April 1972] 35007/75 Divided out of 1431679 Heading B3A [Also in Division F1] A fan impeller disc having a generally circular profile is formed with circumferentially spaced slots around its periphery, the peripheral edge of the disc at one side of each slot being offset radially outwardly of the peripheral edge at the other side of the slot and so shaped that it forms a projection adjacent the mouth of the slot, a fan blade being inserted into the slot and the projection then being deformed inwardly of the disc by the application of radial pressure so as to close the mouth at least substantially. Each blade 6, Figs. 7 and 8, is formed with a crease at the location whereat it is to be fitted into a slot 7 in a disc 3 by pressing the blade inwardly from the convex side 9 so as to form an intermediate wall 10 flanked by side walls 11, the spring between the side walls being substantially equal to the thickness of the disc so that when the blade is slid into the slot, the side walls engage around one edge 12 of the slot. The slot 7 is straight and the wall 10 is slightly curved, or vice versa, whereby the blade becomes clamped into the slot with the centre of one surface of the wall 10 engaging the slot edge 12 and the two ends of the other surface engaging the other slot edge 14. As shown, the length of the crease may be less than the blade chord, the blade being notched for this purpose at each end of the crease before or after the crease is formed. Instead, the blade may be without notches, and in this case the crease has, in addition to walls 11 engaging the slot edge 12, further walls 18, Fig. 11, at one or both ends of the crease to engage the slot edge 14. In the case shown, in which the walls 18 are provided at one end only of the crease, the edge 14 of the slot 7 is curved at 19 to follow the blade contour. In all cases after the blade has been inserted into the slot, a projecting part 21 is deformed by radial pressure into the position 20 to close the slot.
GB3500775A 1972-04-12 1973-04-10 Fan impellers Expired GB1431680A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE472172A SE367234B (en) 1972-04-12 1972-04-12

Publications (1)

Publication Number Publication Date
GB1431680A true GB1431680A (en) 1976-04-14

Family

ID=20264830

Family Applications (2)

Application Number Title Priority Date Filing Date
GB1722673A Expired GB1431679A (en) 1972-04-12 1973-04-10 Impellers for cross-flow fans
GB3500775A Expired GB1431680A (en) 1972-04-12 1973-04-10 Fan impellers

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB1722673A Expired GB1431679A (en) 1972-04-12 1973-04-10 Impellers for cross-flow fans

Country Status (5)

Country Link
JP (2) JPS5532919B2 (en)
DE (2) DE2365861C3 (en)
FR (1) FR2180371A5 (en)
GB (2) GB1431679A (en)
SE (1) SE367234B (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5062706U (en) * 1973-10-04 1975-06-07
US3921272A (en) * 1974-05-24 1975-11-25 Torin Corp Blower wheel and method of making the same
US3977062A (en) * 1975-01-22 1976-08-31 Knut Olof Lennart Wallman Method of assembling blower rotors
DE2517528C2 (en) * 1975-04-21 1983-01-27 Standard Elektrik Lorenz Ag, 7000 Stuttgart Fan roller for blowers
JPS5281581U (en) * 1975-12-17 1977-06-17
JPS5653117Y2 (en) * 1976-12-27 1981-12-10
JPS53125606A (en) * 1977-04-09 1978-11-02 Toshiba Corp Manufacturing method of transvese-flow fan
JPS5698598A (en) * 1980-09-29 1981-08-08 Hitachi Ltd Manufacture of multivane fan
JPS59130097U (en) * 1984-01-09 1984-08-31 赤石金属工業株式会社 cylindrical multi-blade fan
JPS59130096U (en) * 1984-01-09 1984-08-31 赤石金属工業株式会社 Cylindrical multi-blade fan
JPH02118196U (en) * 1990-03-09 1990-09-21
CN102251971A (en) * 2010-05-17 2011-11-23 海尔集团公司 Cross-flow fan

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS415720Y1 (en) * 1964-06-13 1966-03-26
US3262637A (en) * 1964-11-04 1966-07-26 Vernco Corp Individual blade mountings in a blower wheel

Also Published As

Publication number Publication date
JPS4920705A (en) 1974-02-23
JPS5176609A (en) 1976-07-02
DE2365861A1 (en) 1976-07-29
SE367234B (en) 1974-05-20
DE2317083B2 (en) 1978-04-20
GB1431679A (en) 1976-04-14
JPS6014920B2 (en) 1985-04-16
DE2365861B2 (en) 1978-04-20
JPS5532919B2 (en) 1980-08-27
FR2180371A5 (en) 1973-11-23
DE2365861C3 (en) 1978-12-14
DE2317083C3 (en) 1978-12-21
DE2317083A1 (en) 1973-10-31

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years

Effective date: 19930409