WO2016081540A2 - Ventilateur centrifuge et procédé associé - Google Patents

Ventilateur centrifuge et procédé associé Download PDF

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Publication number
WO2016081540A2
WO2016081540A2 PCT/US2015/061228 US2015061228W WO2016081540A2 WO 2016081540 A2 WO2016081540 A2 WO 2016081540A2 US 2015061228 W US2015061228 W US 2015061228W WO 2016081540 A2 WO2016081540 A2 WO 2016081540A2
Authority
WO
WIPO (PCT)
Prior art keywords
plate
feature
impeller
circumferential
blades
Prior art date
Application number
PCT/US2015/061228
Other languages
English (en)
Other versions
WO2016081540A3 (fr
Inventor
Charles L. Barry
Original Assignee
Twin City Fan Companies, 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 Twin City Fan Companies, Ltd. filed Critical Twin City Fan Companies, Ltd.
Publication of WO2016081540A2 publication Critical patent/WO2016081540A2/fr
Publication of WO2016081540A3 publication Critical patent/WO2016081540A3/fr

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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/14—Spinning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/26—Making other particular articles wheels or the like
    • B21D53/267—Making other particular articles wheels or the like blower wheels, i.e. wheels provided with fan elements
    • 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
    • F04D29/02—Selection of particular materials
    • F04D29/023—Selection of particular materials especially adapted for elastic fluid pumps
    • 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
    • F05D2230/00—Manufacture
    • F05D2230/50—Building or constructing in particular ways
    • F05D2230/54—Building or constructing in particular ways by sheet metal manufacturing

Definitions

  • Embodiments described herein generally relate to fan assemblies.
  • Specific examples may include plenum or plug fan housings and fan assemblies and centrifugal fan assemblies.
  • Fan impellers are routinely subjected to large forces such as centrifugal forces during operation. These forces may eventually lead to unwanted cracking or fatigue failure in one or more components of the impeller. Improved configuration and methods are desired to improve strength and reliability of impellers.
  • FIG. 1 is an orthogonal view of a fan assembly in accordance with some embodiments of the invention.
  • FIG. 2A is a cross section view of a fan impeller of the prior art.
  • FIG. 2B is a cross section view of a fan impeller in accordance with some embodiments of the invention.
  • FIG. 3 is a flow diagram of a method of making a fan impeller in accordance with some embodiments of the invention.
  • Figure 1 shows a fan assembly 100 according to one example.
  • the fan assembly 100 includes a motor 110, a support fame 140 holding the motor in place, and an impeller 120.
  • the impeller 120 is coupled directly to a shaft of the motor 110, although the invention is not so limited. In other examples, the impeller 120 is coupled to a shaft of the motor 110 indirectly through a belt drive, or other transmission such as a gear box, etc.
  • a front plate 130 is further shown in Figure 1 as part of the fan assembly 100, and a funnel 132 is used to direct air into the impeller 120.
  • the impeller 120 shown in Figure 1 is configured as a centrifugal impeller, having a back plate 122, a front plate 124, and a number of blades 126 coupled between the front plate 124 and the back plate 122.
  • Blades 126 may include single thickness metal flat blades, curved blades, airfoil shaped blades, or other suitable blade shapes.
  • the fan assembly 100 shown may be used in a number of different configurations, including but not limited to a turbine or plenum fan.
  • the impeller 120 as described in more detail below may be used in any number of different fan configurations.
  • the fan assembly 100 shown in Figure 1 is merely one example for illustration.
  • FIG. 2A shows a centrifugal impeller 200 according to the prior art.
  • the centrifugal impeller 200 is shown as half a cross section, with a center of the impeller 200 at location 201.
  • the centrifugal impeller 200 is shown with a back plate 222, a front plate 224, and one representative blade 226 of a number of blades.
  • Centrifugal impellers are often subjected to high cyclic stresses that can cause cracking and eventual failure in one or more of the plates.
  • a reinforcing ring 228 is welded onto the front plate 224.
  • An amount of weld material 230 is shown at the interface between the front plate 224 and the reinforcing ring 228.
  • a welding operation to attach the reinforcing ring 228 may be expensive, and the heat of welding may weaken the plate material and/or introduce unwanted stress concentration features, such as notches or other imperfections from the weld material 230. Additionally, it may be difficult to center the reinforcing ring 228 on the front plate 224, which may lead to an unwanted imbalance in the impeller 200.
  • FIG. 2B shows a centrifugal impeller 120 according to an example of the present invention. Similar to Figure 2A, the centrifugal impeller 120 is shown as half a cross section, with a center of the impeller 120 at location 121. The centrifugal impeller 120 is shown with a back plate 122, a front plate 124, and one representative blade 126 of a number of blades. A circumferential feature 128 is shown formed within the front plate 124, and spaced apart from an outside edge 152 and an inside edge 154. The circumferential feature 128 extends outward in a direction normal to a plane of the front plate 124. The circumferential feature 128 shown in Figure 2B extends outward to the left of the front plate 124, however in other examples, the circumferential feature 128 may extend outward to the right, toward the back plate 122.
  • the process of forming the circumferential feature 128 provides a number of advantages, both for manufacturability, and physical property advantages.
  • the process or forming the circumferential feature 128 is less time consuming than welding an additional reinforcing ring 228 onto the front plate, as shown in Figure 2A.
  • the metal With regard to physical properties, when the circumferential feature 128 is formed, the metal becomes work hardened in and around the circumferential feature 128, providing increased strength. The work hardening comes from microstructural difference in the material that are caused by the forming process.
  • the location of the circumferential feature 128, in between and spaced apart from the outside edge 152 and the inside edge 154, provides a strengthening property to the front plate 124 at a location apart from the edges 152 and 154 that may be prone to failure.
  • the addition of the circumferential feature 128 may reduce or eliminate a likelihood of failure.
  • circumferential feature 128 is shown formed between and spaced apart from the outside edge 152 and the inside edge 154, the invention is not so limited.
  • a circumferential feature is formed on the back plate 122, between and spaced apart from an outside edge 125 and the center 121.
  • a circumferential feature as described is formed in both a front plate 124 and a back plate 122.
  • circumferential features may be formed for additional strengthening between and spaced apart from the outside edge 152 and the inside edge 154. Multiple circumferential features may also be formed within the back plate 122 in selected examples.
  • an outer edge feature and/or an inner edge feature may be formed at the outside edge 152 and/or the inside edge 154.
  • Such additional features may further enhance strengthening of the plates, such as the front plate 124 and the back plate 122, without the need for welding additional components onto the plates.
  • the circumferential feature 128 shows a semi-circular cross section.
  • Other geometries for a cross section of the circumferential feature 128 are also possible, including, but not limited to angled or V shaped cross sections, box cross sections, or other suitable cross sections.
  • One suitable material for all or a portion of the impeller 120 includes aluminum or an aluminum alloy. Another suitable material for all or a portion of the impeller 120 includes steel. Other formable metallic materials are also within the scope of the invention.
  • FIG. 3 shows a flow diagram of one method of forming a fan assembly according to an embodiment of the invention.
  • a number of fan blades are attached, extending substantially normal at a periphery of a first circular plate.
  • a circumferential feature is formed within a second circular plate and spaced apart from edges of the plate, the feature extending outward in a direction normal to a plane of the plate.
  • attaching the fan blades includes welding the fan blades.
  • forming the circumferential feature includes pressing, the circumferential feature into a side of a plate using a die and a press, such as a hydraulic press. In this operation, the entire circumferential feature may be formed in one stroke of the press, which may speed up manufacture.
  • the circumferential feature may be spin formed into the plate. Spin forming provides an advantage of ensuring that the circumferential feature is centered about an axis of rotation of the plate, and/or the impeller as assembled. In one example, spin forming includes pressing the plate over a mandrel or die as the mandrel or die is being rotated.
  • the second circular plate is attached to the number of fan blades in a location opposite and substantially parallel to the first circular plate.
  • attaching the second circular plate includes welding the second circular plate to the fan blades.
  • Example 1 includes a centrifugal fan impeller.
  • the impeller includes a number of circular plates, including a back plate, and a ring shaped front plate, a number of blades coupled between the back plate and the front plate, and a circumferential feature formed within at least one of the plates and spaced apart from edges of the plate, the feature extending outward in a direction normal to a plane of the plate.
  • Example 2 includes the centrifugal fan impeller of example 1 , wherein the circumferential feature has a semi-circular cross section.
  • Example 3 includes the centrifugal fan impeller of any one of examples 1-2, wherein the circumferential feature has an angled cross section.
  • Example 4 includes the centrifugal fan impeller of any one of examples 1-3, wherein the components are formed from steel.
  • Example 5 includes the centrifugal fan impeller of any one of examples 1-4, wherein the components are formed from aluminum.
  • Example 6 includes the centrifugal fan impeller of any one of examples 1-5, further including an outer edge formed feature in one or more of the number of circular plates.
  • Example 7 includes the centrifugal fan impeller of any one of examples 1-6, further including an inner edge formed feature in one or more of the number of circular plates.
  • Example 8 includes the centrifugal fan impeller of any one of examples 1-7, wherein the number of blades includes airfoil blades.
  • Example 9 includes the centrifugal fan impeller of any one of examples 1-8, wherein the number of blades includes single thickness blades.
  • Example 10 includes a fan assembly, including a motor and an impeller coupled to a shaft of the motor.
  • the impeller includes a number of circular plates, including a back plate, and a ring shaped front plate, a number of blades coupled between the back plate and the front plate, a circumferential feature formed within at least one of the plates and spaced apart from edges of the plate, the feature extending outward in a direction normal to a plane of the plate, and a support frame coupled to the motor.
  • Example 11 includes the fan assembly of example 10, wherein the shaft of the motor is directly coupled to the impeller.
  • Example 12 includes the fan assembly of any one of examples
  • Example 13 includes the fan assembly of any one of examples
  • the fan assembly is configured as a plenum fan.
  • Example 14 is a method including attaching a number of fan blades extending substantially normal at periphery of a first circular plate, forming a circumferential feature within a second circular plate and spaced apart from edges of the plate, the feature extending outward in a direction normal to a plane of the plate, and attaching the second circular plate to the number of fan blades in a location opposite and substantially parallel to the first circular plate.
  • Example 15 includes the method of example 14, further including forming a circumferential feature within the first circular plate and spaced apart from edges of the plate, the feature extending outward in a direction normal to a plane of the plate.
  • Example 16 includes the method of any one of examples 14-15, wherein forming a circumferential feature includes forming a semi-circular cross sectioned feature.
  • Example 17 includes the method of any one of examples 14-16, wherein forming a circumferential feature includes forming multiple
  • Example 18 includes the method of any one of examples 14-17, wherein forming a circumferential feature includes spin forming.
  • Example 19 includes the method of any one of examples 14-18, wherein forming a circumferential feature includes pressing.

Landscapes

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

Abstract

La présente invention concerne une roue de ventilateur, un ensemble ventilateur et des procédés associés. Des configurations sélectionnées sont présentées, qui comprennent une nervure circonférentielle formée dans une plaque d'une roue de ventilateur et espacée des bords de ladite plaque.
PCT/US2015/061228 2014-11-19 2015-11-18 Ventilateur centrifuge et procédé associé WO2016081540A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US14/547,167 US20160138606A1 (en) 2014-11-19 2014-11-19 Centrifugal fan and method
US14/547,167 2014-11-19

Publications (2)

Publication Number Publication Date
WO2016081540A2 true WO2016081540A2 (fr) 2016-05-26
WO2016081540A3 WO2016081540A3 (fr) 2016-08-18

Family

ID=55961289

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2015/061228 WO2016081540A2 (fr) 2014-11-19 2015-11-18 Ventilateur centrifuge et procédé associé

Country Status (2)

Country Link
US (1) US20160138606A1 (fr)
WO (1) WO2016081540A2 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10054130B1 (en) 2017-06-19 2018-08-21 Dekalb Blower Inc. Rotary seal for an industrial fan assembly
US10605258B2 (en) 2017-06-19 2020-03-31 Dekalb Blower Inc. Forward curved blade impeller for an industrial fan assembly
US10935040B2 (en) 2017-06-19 2021-03-02 The Boeing Company Radial blade impeller for an industrial fan assembly
US10356943B2 (en) 2017-06-19 2019-07-16 Dekalb Blower Inc. Industrial fan assembly
US10605262B2 (en) 2017-06-19 2020-03-31 Dekalb Blower Inc. Axial blade impeller for an industrial fan assembly
US11374458B2 (en) 2018-10-24 2022-06-28 Dekalb Blower Inc. Electric motor with fluid cooling

Family Cites Families (14)

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Publication number Priority date Publication date Assignee Title
US2628419A (en) * 1946-11-22 1953-02-17 Lau Blower Co Blower
US2628769A (en) * 1947-03-17 1953-02-17 Lau Blower Co Blower
US2745597A (en) * 1953-01-13 1956-05-15 Harvey Whipple Inc Fan
US3211364A (en) * 1963-10-30 1965-10-12 Lau Blower Co Blower wheel
US3863517A (en) * 1973-09-10 1975-02-04 Lear Siegler Inc Centrifugal pump mount
JPS5171515A (en) * 1974-12-19 1976-06-21 Rokugo Seisakusho Goshi Kanryufuanyohaneguruma
US4531890A (en) * 1983-01-24 1985-07-30 Stokes Walter S Centrifugal fan impeller
US4613281A (en) * 1984-03-08 1986-09-23 Goulds Pumps, Incorporated Hydrodynamic seal
US5328332A (en) * 1993-05-25 1994-07-12 Chiang Swea T Wheel fan of range hood
US20020148067A1 (en) * 2001-04-12 2002-10-17 James Streeter Circumferential ridge for a centrifugal fan
US6508627B2 (en) * 2001-05-30 2003-01-21 Lau Industries, Inc. Airfoil blade and method for its manufacture
US6955283B2 (en) * 2003-09-08 2005-10-18 The Boeing Company Adaptable mandrel for spin forming
KR20050038710A (ko) * 2003-10-22 2005-04-29 삼성전자주식회사 송풍장치 및 이를 갖춘 공기조화기
US7891210B2 (en) * 2008-01-24 2011-02-22 Johnson Controls Technology Company Adjustable motor base for an HVAC&R blower motor

Also Published As

Publication number Publication date
WO2016081540A3 (fr) 2016-08-18
US20160138606A1 (en) 2016-05-19

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