US3906606A - Erection procedure for vertical shaft air preheaters - Google Patents

Erection procedure for vertical shaft air preheaters Download PDF

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Publication number
US3906606A
US3906606A US505421A US50542174A US3906606A US 3906606 A US3906606 A US 3906606A US 505421 A US505421 A US 505421A US 50542174 A US50542174 A US 50542174A US 3906606 A US3906606 A US 3906606A
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US
United States
Prior art keywords
rotor
post
compartments
rotor post
compartment
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 - Lifetime
Application number
US505421A
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English (en)
Inventor
Robert Emmett Mahoney
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.)
Alstom Power Inc
Original Assignee
Air Preheater Co Inc
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=24010240&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=US3906606(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Air Preheater Co Inc filed Critical Air Preheater Co Inc
Priority to US505421A priority Critical patent/US3906606A/en
Priority to BR979/75A priority patent/BR7500979A/pt
Priority to JP10813475A priority patent/JPS5427978B2/ja
Priority to GB37126/75A priority patent/GB1504028A/en
Priority to AU84722/75A priority patent/AU484474B2/en
Priority to DE2540438A priority patent/DE2540438C2/de
Priority to FR7527944A priority patent/FR2284850A1/fr
Priority to OA55608A priority patent/OA05108A/xx
Priority to NZ178670A priority patent/NZ178670A/xx
Publication of US3906606A publication Critical patent/US3906606A/en
Application granted granted Critical
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D19/00—Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium
    • F28D19/04—Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium using rigid bodies, e.g. mounted on a movable carrier
    • F28D19/041—Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium using rigid bodies, e.g. mounted on a movable carrier with axial flow through the intermediate heat-transfer medium
    • F28D19/042—Rotors; Assemblies of heat absorbing masses
    • F28D19/044—Rotors; Assemblies of heat absorbing masses shaped in sector form, e.g. with baskets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • B23P15/26—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass heat exchangers or the like
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4935—Heat exchanger or boiler making
    • Y10T29/49357—Regenerator or recuperator making
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49828—Progressively advancing of work assembly station or assembled portion of work
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49904—Assembling a subassembly, then assembling with a second subassembly

Definitions

  • ABSTRACT The method of manufacturing a rotor for a vertical shaft air preheater that rotates about a vertical axis between streams of hot gas and cool air.
  • the rotor comprises a series of independent compartments that each contain a mass of heat absorbent element.
  • the rotor is constructed by simultaneously securing to a rotor post two similar sector shaped compartments disposed at 180 to each other about the rotor post and by continuing to attach additional pairs of similar sector shaped compartments to opposite sides of thr rotor post until the compartments define a rotor.
  • the compartments are pivotally attached to the rotor post and joined together at their outer extremetiesto form a composite assembly that extends around the rotor post.
  • This invention relates to a rotary regenerative air preheater and has particular relation to an arrangement by which compartments or baskets that carry a mass of heat absorbent element are assembled around a rotary shaft that in turn is disposed about a vertical axis.
  • the rotary shaft and the assembly of element baskets are combined into a unit that operates as an integral body but one in which the several parts thereof are independent and free to thermally expand and contract.
  • Rotary regenerative air preheaters are customarily made of individual parts that are assembled and then connected together by a system of welded joints in the manner defined by US. Pat. No. 3,267,562 of Chiang.
  • An air preheater constructed in this manner is initially strong, but when subjected to repeated heating and cooling as may attend normal service operations, a differential of expansion occurs between the several parts and a substantial stress is accordingly concentrated in the welded joints therebetween with a resulting crack ing or breaking of the welded joints so that the serviceability of the air preheater is materially impaired.
  • 1 therefore provide a procedure whereby an air preheater comprising a series of similar sector shaped compartments may be assembled about the periphery of a vertically disposed central rotor post.
  • the assembly procedure defined is adapted to permit the gradual assembly of heavy compartments without attendant problems of imbalance, and it is moreover designed to provide a vertical shafted composite rotor of integral parts that are pivotally joined together whereby they are free to expand and contract as dictated by thermal change and not subject to cracking and breaking of welds as associated with continuous expansion and contraction of elements that are joined together by welding.
  • FIG. I is a sectional view of an air preheater made generally according to the present invention.
  • FIG. 2 is a preferred embodiment of the invention as contained in a perspective view of the apparatus.
  • the arrangement of the drawing shows a rotary regenerative heat exchanger witha vertically disposed rotor post 12 having a support bearing 14 at the lower end thereof and a guide bearing 16 at the upper end thereof on transverse support structure 35.
  • the rotor assembly comprising a series of sector shaped compartments 26 is pivotally attached to the rotor post at upper and lower connections 30 and 33, and it is rotated about its vertical axis by a drive motor 18 that is connected through suitable reduction gearing 22 to the rotor post 12.
  • a mass of permeable heat absorbent material 24 contained in the independent sector shaped compartments 26 is adapted to absorb heat from hot fluid and then give it up to cooler fluid as it flows therethrough.
  • the compartments 26 are open at opposite ends thereof to permit the countercurrent flow of hot gas and cooler air and they are secured to the'rotor post 12 by pivotal linkage 30 33 which permits limited relative movement between the compartments and the rotor post 12 as may be brought about by thermal expansion and contraction.
  • the assembled compartments are surrounded by a rotor housing 32 having openings 36, 38, 42 and 44 opposite ends of the rotor for the inlet and outlet of the hot gas and cooler air.
  • radial sealing means 45 in the form of elongate leaves are inserted be: tween the end edges of the composite rotor compartments and held by bolts 49 while circumferential seals 47 at the peripheral edge of the rotor are adapted to bridge the space between the rotor and the surrounding rotor housing in accordance with standard practice.
  • Pivotal couplings 30 33 are attached independently to rotor post 12 to support each compartment in a manner that permits a limited amount of relative movement therebetween as is necessary to accommodate normal variations.
  • the radial outer ends of the sectorial rotor compartments 26 are bolted together as at 52 to comprise an integral rotor mass that extends as an annular body around the rotor post.
  • a support bearing 14 is first connected to suitable structure such as a horizontal beam 10 capable of supporting the entire air preheater.
  • suitable structure such as a horizontal beam 10 capable of supporting the entire air preheater.
  • One end of the rotor post 12 is vertically supported in the support bearing 14 and the opposite end of the vertically disposed rotor post is supported against lateral movement by a guide bearing 16 that is itself carried by a support beam or other structure 35 having a predetermined strength sufficient to preclude lateral movement thereof when loaded unevenly as by an element compartment 26 that may be temporarily positioned at one side of the rotor postv
  • a rotor compartment 26 containing a mass of heat absorbent element 24 is then moved by an overhead hoist or other lifting means shown schematically at 55A into position laterally adjacent the rotor post 12 and is attahced thereto by pins 56 in accordance with standard porcedure.
  • a second hoist 55B is adapted to lift a second compartment 26 to the rotor post at a point that is removed 180 from the first compartment.
  • Both compartments 26 are attached to the rotor post by means of a standard pivotal attachment that includes a lower compression fitting 33 and the upper tension fitting 30.
  • a standard pivotal attachment that includes a lower compression fitting 33 and the upper tension fitting 30.
  • Additional rotor compartments 26 are then lifted into position adjacent opposite compartments 26 that are already attached to the rotor post, and they are pivotally secured in the same manner as those already attached thereto so that there is at all times a balanced assembly.
  • the hoists 55A and 55B are removed and the compartments are secured loosely by bolts 52 to an adjacent basket so they are free to adjust themselves to a slight repositioning of the rotor compartments.
  • compartments 26 are progressively at tached to opposite sides of the rotor post 12 and to adjacent compartments until an annular assembly of compartments extends completely around the rotor post, all of which are held to the rotor post by a pivotal connection 56 and to one another by bolts 52.
  • each loose connection 52 between baskets is progressively tightened so that the rotor assumes a permanent annular configuration concentric with the rotor post and having radial sealing means 45 positioned between edges of adjacent baskets wherein circumferential seals 47 are adapted to bridge the spacing between the rotor and a surrounding rotor housing.
  • the compartments may be lifted into position adjacent the rotor post and supported temporarily on compression type supports on the underside thereof until the compartments are secured to the rotor post.
  • the supports therefor may be removed and replaced in such a position that additional compartments may be supported thereby until the rotor is complete.
  • the method of manufacturing a rotor for a vertical shaft rotary regenerative air preheater comprising the steps of supporting one end of a vertical rotor post in a rotatable support bearing, positioning the opposite end of said rotor post in a guide bearing that precludes lateral movement of the rotor post, positioning a sector shaped element compartment radially adjacent the rotor post and attaching it thereto while substantially simultaneously attaching a similar element compartment to the rotor post removed from the first rotor compartment so that there is at all times a substantially balanced assembly, and continuing to attach similar sector shaped compartments to opposite sides of said rotor post until the combined assembly of compartments comprises a composite rotor that extends concentrically around the rotor post.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Supply (AREA)
US505421A 1974-09-12 1974-09-12 Erection procedure for vertical shaft air preheaters Expired - Lifetime US3906606A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
US505421A US3906606A (en) 1974-09-12 1974-09-12 Erection procedure for vertical shaft air preheaters
BR979/75A BR7500979A (pt) 1974-09-12 1975-02-18 Processo para fabricacao de um rotor para um pre-aquecedor de ar regenerativo rotativo
JP10813475A JPS5427978B2 (pt) 1974-09-12 1975-09-08
GB37126/75A GB1504028A (en) 1974-09-12 1975-09-09 Method of manufacturing a vertical shaft air preheater
AU84722/75A AU484474B2 (en) 1974-09-12 1975-09-11 Erection procedure for vertical shaft air preheaters
DE2540438A DE2540438C2 (de) 1974-09-12 1975-09-11 Verfahren zur Herstellung eines Rotors für einen Drehspeicher-Luftvorwärmer mit senkrecht angeordneter Rotorwelle
FR7527944A FR2284850A1 (fr) 1974-09-12 1975-09-11 Perfectionnements aux rechauffeurs d'air tournants a recuperation
OA55608A OA05108A (fr) 1974-09-12 1975-09-12 Perfectionnements aux réchauffeurs d'air tournants à récupération.
NZ178670A NZ178670A (en) 1974-09-12 1975-09-12 Rotary regenerative air preheater, method of construction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US505421A US3906606A (en) 1974-09-12 1974-09-12 Erection procedure for vertical shaft air preheaters

Publications (1)

Publication Number Publication Date
US3906606A true US3906606A (en) 1975-09-23

Family

ID=24010240

Family Applications (1)

Application Number Title Priority Date Filing Date
US505421A Expired - Lifetime US3906606A (en) 1974-09-12 1974-09-12 Erection procedure for vertical shaft air preheaters

Country Status (8)

Country Link
US (1) US3906606A (pt)
JP (1) JPS5427978B2 (pt)
BR (1) BR7500979A (pt)
DE (1) DE2540438C2 (pt)
FR (1) FR2284850A1 (pt)
GB (1) GB1504028A (pt)
NZ (1) NZ178670A (pt)
OA (1) OA05108A (pt)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5615732A (en) * 1996-02-22 1997-04-01 Abb Preheater, Inc. Air preheater with semi-modular rotor construction

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007046651A (ja) * 2005-08-08 2007-02-22 Togo Seisakusho Corp ケーブルの抜止具及びケーブルの取付構造

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US253743A (en) * 1882-02-14 Apparatus for elevating poles for electric lights
US3267562A (en) * 1963-04-29 1966-08-23 Air Preheater Rotor assembly
US3710851A (en) * 1971-08-19 1973-01-16 Air Preheater Ball-and-socket coupling for rotor
US3710850A (en) * 1971-08-04 1973-01-16 Air Preheater Unrestrained rotor
US3861013A (en) * 1974-01-17 1975-01-21 Air Preheater Method of constructing a rotor for a rotary regenerative heat exchanger

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US253743A (en) * 1882-02-14 Apparatus for elevating poles for electric lights
US3267562A (en) * 1963-04-29 1966-08-23 Air Preheater Rotor assembly
US3710850A (en) * 1971-08-04 1973-01-16 Air Preheater Unrestrained rotor
US3710851A (en) * 1971-08-19 1973-01-16 Air Preheater Ball-and-socket coupling for rotor
US3861013A (en) * 1974-01-17 1975-01-21 Air Preheater Method of constructing a rotor for a rotary regenerative heat exchanger

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5615732A (en) * 1996-02-22 1997-04-01 Abb Preheater, Inc. Air preheater with semi-modular rotor construction

Also Published As

Publication number Publication date
DE2540438A1 (de) 1976-03-25
GB1504028A (en) 1978-03-15
JPS5427978B2 (pt) 1979-09-13
AU8472275A (en) 1977-03-17
DE2540438C2 (de) 1983-12-08
JPS5153649A (pt) 1976-05-12
FR2284850B1 (pt) 1978-12-01
FR2284850A1 (fr) 1976-04-09
OA05108A (fr) 1981-01-31
BR7500979A (pt) 1976-11-16
NZ178670A (en) 1978-04-28

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