GB918017A - Improvements in or relating to output control means of centrifugal fans or pumps - Google Patents

Improvements in or relating to output control means of centrifugal fans or pumps

Info

Publication number
GB918017A
GB918017A GB1790660A GB1790660A GB918017A GB 918017 A GB918017 A GB 918017A GB 1790660 A GB1790660 A GB 1790660A GB 1790660 A GB1790660 A GB 1790660A GB 918017 A GB918017 A GB 918017A
Authority
GB
United Kingdom
Prior art keywords
dampers
fully
duct
baffle
rectangular
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
GB1790660A
Inventor
Thomas Bosanko Collins
Frank Shultess Haigh
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.)
Davidson and Co Ltd
Original Assignee
Davidson and Co Ltd
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 Davidson and Co Ltd filed Critical Davidson and Co Ltd
Priority to GB1790660A priority Critical patent/GB918017A/en
Priority to BE604058A priority patent/BE604058A/en
Publication of GB918017A publication Critical patent/GB918017A/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

Landscapes

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

Abstract

918,017. Centrifugal pumps. DAVIDSON & CO. Ltd. March 20, 1961 [May 20, 1960; Nov. 16, 1960], Nos. 17906/60 and 39393/60. Class 110 (1). A centrifugal fan with a side inlet duct consisting of a semicylindrical part, which may be coaxial with the fan inlet eye, joined to a part of rectangular cross-section has two or more swivelling dampers, located in the rectangular part, connected by a linkage to each other, an operating handle and to a baffle, located at the periphery of the semicylindrical part of the duct. The dampers, which are defined as vanes pivoted about an axis between the two edges of the vane, can move from a fully-closed position to a fully-open position. The baffle, which is defined as a vane pivoted about one edge, moves from a position giving minimum baffling effect to a position giving maximum baffling effect as the dampers move from the fully-closed to the fully-open position. One of the dampers moves at a rate different from the others. A centrifugal fan has mounted in the rectangular side inlet duct 17 two dampers 19 and 20, rectangular in shape and arranged to overlap so as to block the duct completely when in the closed position. The damper 19 is twice as wide as the damper 20. The dampers are connected together by a linkage controlled by a handle 50 so that they rotate simultaneously but at different rates. The dampers are also connected by the linkage to a pivoted baffle 44 mounted in the semicylindrical portion 15. When the dampers are fully open the baffle provides maximum baffling effect and minimum baffling effect when the dampers are closed. In a modification, three dampers of the same size are mounted in a detachable sub-portion of the duct but with one damper rotating in parts of its travel at a different rate to the other dampers.
GB1790660A 1960-05-20 1960-05-20 Improvements in or relating to output control means of centrifugal fans or pumps Expired GB918017A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB1790660A GB918017A (en) 1960-05-20 1960-05-20 Improvements in or relating to output control means of centrifugal fans or pumps
BE604058A BE604058A (en) 1960-05-20 1961-05-19 Improvements relating to flow adjustment devices for fans or centrifugal pumps.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1790660A GB918017A (en) 1960-05-20 1960-05-20 Improvements in or relating to output control means of centrifugal fans or pumps

Publications (1)

Publication Number Publication Date
GB918017A true GB918017A (en) 1963-02-13

Family

ID=10103329

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1790660A Expired GB918017A (en) 1960-05-20 1960-05-20 Improvements in or relating to output control means of centrifugal fans or pumps

Country Status (1)

Country Link
GB (1) GB918017A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3699873A (en) * 1971-06-14 1972-10-24 Philco Ford Corp Air flow control apparatus
USRE28650E (en) * 1970-04-30 1975-12-16 Adjustable speed air drive-air sweep for air conditioner

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE28650E (en) * 1970-04-30 1975-12-16 Adjustable speed air drive-air sweep for air conditioner
US3699873A (en) * 1971-06-14 1972-10-24 Philco Ford Corp Air flow control apparatus

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