GB843066A - Variable pitch fan - Google Patents

Variable pitch fan

Info

Publication number
GB843066A
GB843066A GB2262258A GB2262258A GB843066A GB 843066 A GB843066 A GB 843066A GB 2262258 A GB2262258 A GB 2262258A GB 2262258 A GB2262258 A GB 2262258A GB 843066 A GB843066 A GB 843066A
Authority
GB
United Kingdom
Prior art keywords
piston
pitch
fan
heat exchanger
hub
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
GB2262258A
Inventor
Macon Petty
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.)
Hudson Engineering Corp
Original Assignee
Hudson Engineering Corp
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 Hudson Engineering Corp filed Critical Hudson Engineering Corp
Priority to GB2262258A priority Critical patent/GB843066A/en
Publication of GB843066A publication Critical patent/GB843066A/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
    • 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
    • F04D27/002—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying geometry within the pumps, e.g. by adjusting vanes

Landscapes

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

Abstract

843,066. Axial-flow fans. HUDSON ENGINEERING CORPORATION. July 15, 1958, No. 22622/58. Class 110 (1). [Also in Group XXIX] A variable-pitch fan 18, Fig. 1, driven through a shaft 22 and speed-changer 21 by a motor 20 to pass air through a heat exchanger 13 has the pitch of its blades adjusted pneumatically by a control instrument 23 subject to the control of a temperature-sensing device 24 in the outlet 15 from the heat exchanger. The hub 18, Fig. 3, of the fan has a bore 30 containing a piston 31 acted upon in opposition to a loading spring 32 by a flexible diaphragm 38 subject to the pneumatic control pressure in a chamber 39 which is connected to the control instrument through a conduit 25 incorporating a coupling 26 which permits the stationary conduit 25 to be connected to the rotary hub. The piston 31 has a circumferential groove 66 in which is received a stud 64 mounted eccentrically on the end of each of the four blades of the fan so that axial movement of the piston adjusts simultaneously the pitch of each blade. Each blade 19a is screw threaded into a ferrule 50 in which it is locked by grub screws 62, and ball thrust braces 54, 55 are situated on either side of a flange 51 on each ferrule. The ferrules and the piston 31 are surrounded by sealing rings 85, 86 which retain lubricant within the hub. Radially adjustable, screw-threaded studs (not shown) have conical ends to coact with inclined walls 71, 72 of an annular groove 70 in the piston to provide maximum and minimum pitch stops. In the minimum pitch position the fan blades are arranged to have a slightly reversed pitch so as to counteract the tendency for air to flow upwardly due to the heating effect of the heat exchanger 13, thereby effecting a complete stoppage of air flow.
GB2262258A 1958-07-15 1958-07-15 Variable pitch fan Expired GB843066A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2262258A GB843066A (en) 1958-07-15 1958-07-15 Variable pitch fan

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2262258A GB843066A (en) 1958-07-15 1958-07-15 Variable pitch fan

Publications (1)

Publication Number Publication Date
GB843066A true GB843066A (en) 1960-08-04

Family

ID=10182417

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2262258A Expired GB843066A (en) 1958-07-15 1958-07-15 Variable pitch fan

Country Status (1)

Country Link
GB (1) GB843066A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016128469A1 (en) * 2015-02-12 2016-08-18 Baruffaldi S.P.A. Pre-assembled blade for fans for cooling the coolant in machines/vehicles and fan provided with said blade
CN110529429A (en) * 2019-08-23 2019-12-03 庄秋瑶 Adaptive electric fan

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016128469A1 (en) * 2015-02-12 2016-08-18 Baruffaldi S.P.A. Pre-assembled blade for fans for cooling the coolant in machines/vehicles and fan provided with said blade
CN107250554A (en) * 2015-02-12 2017-10-13 巴鲁法蒂股份公司 For the fan that cools down the cooling agent in machine/vehicle pre-assembled blade and be provided with the fan of the blade
US10208766B2 (en) 2015-02-12 2019-02-19 Baruffaldi S.P.A. Pre-assembled blade for fans for cooling the coolant in machines/vehicles and fan provided with said blade
CN107250554B (en) * 2015-02-12 2020-01-03 巴鲁法蒂股份公司 Preassembled blade for a fan for cooling a coolant in a machine/vehicle and fan provided with said blade
CN110529429A (en) * 2019-08-23 2019-12-03 庄秋瑶 Adaptive electric fan

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