GB919988A - Fan unit for fluid flow control in cooling, ventilating and similar systems - Google Patents

Fan unit for fluid flow control in cooling, ventilating and similar systems

Info

Publication number
GB919988A
GB919988A GB2392660A GB2392660A GB919988A GB 919988 A GB919988 A GB 919988A GB 2392660 A GB2392660 A GB 2392660A GB 2392660 A GB2392660 A GB 2392660A GB 919988 A GB919988 A GB 919988A
Authority
GB
United Kingdom
Prior art keywords
bore
pitch
gear
blades
fan
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
GB2392660A
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 GB919988A publication Critical patent/GB919988A/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
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/34—Blade mountings
    • F04D29/36—Blade mountings adjustable
    • F04D29/362—Blade mountings adjustable during rotation

Landscapes

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

Abstract

919,988. Axial-flow fans. MARSICO, C. July 8, 1960 [July 11, 1959], No. 23926/60. Class 110(1). A fan comprises rotatable blades radially mounted on a hub having a bore concentric with the axis of rotation of the fan, a helicallythreaded member engaging helical threads in the bore whereby axial displacement of the member along the bore causes rotation of the member, a gear-wheel connected to the member meshing with a gear-wheel connected to each blade to rotate the blades to alter their pitch, means being provided for urging the member to a datum position in the bore. In an axial-flow fan, the impeller blades are carried by radially-disposed pivot pins 2 each carrying a bevel pinion 7 meshing with bevel gears 8, 8<SP>1</SP>. Fluid under pressure can be supplied through a pipe 26 to a capsule 13 to move a cylindrical member 12 axially against the action of a spring 24. The spring force can be adjusted by means of a screw 25. Helical ribs on the outside of member 12 engage helical grooves formed in a stationary bush 9, whereby the member 12 is caused to rotate as it moves axially. This rotation is imparted through a key 17 to the hub 15 of bevel gear 8, whereby an increase in the fluid pressure effects a decrease in the pitch of the impeller blades. The variation of pitch may be such that the air flow can be reversed.
GB2392660A 1959-07-11 1960-07-08 Fan unit for fluid flow control in cooling, ventilating and similar systems Expired GB919988A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT1178959 1959-07-11

Publications (1)

Publication Number Publication Date
GB919988A true GB919988A (en) 1963-02-27

Family

ID=11137857

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2392660A Expired GB919988A (en) 1959-07-11 1960-07-08 Fan unit for fluid flow control in cooling, ventilating and similar systems

Country Status (1)

Country Link
GB (1) GB919988A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113482978A (en) * 2021-08-12 2021-10-08 浙江东方机电有限公司 High-stability fan power system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113482978A (en) * 2021-08-12 2021-10-08 浙江东方机电有限公司 High-stability fan power system
CN113482978B (en) * 2021-08-12 2024-03-19 浙江东方机电有限公司 High-stability fan power system

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