US3710850A - Unrestrained rotor - Google Patents

Unrestrained rotor Download PDF

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Publication number
US3710850A
US3710850A US00168877A US3710850DA US3710850A US 3710850 A US3710850 A US 3710850A US 00168877 A US00168877 A US 00168877A US 3710850D A US3710850D A US 3710850DA US 3710850 A US3710850 A US 3710850A
Authority
US
United States
Prior art keywords
rotor
baskets
post
heat exchange
exchange apparatus
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
US00168877A
Other languages
English (en)
Inventor
H Kurschner
R 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
Application filed by Air Preheater Co Inc filed Critical Air Preheater Co Inc
Application granted granted Critical
Publication of US3710850A publication Critical patent/US3710850A/en
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
    • F28D19/047—Sealing means
    • 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
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S165/00—Heat exchange
    • Y10S165/009—Heat exchange having a solid heat storage mass for absorbing heat from one fluid and releasing it to another, i.e. regenerator
    • Y10S165/013—Movable heat storage mass with enclosure
    • Y10S165/016—Rotary storage mass
    • Y10S165/026—Seal attached to and rotating with storage mass

Definitions

  • ABSTRACT A rotor structure for a rotary regenerative heat exchanger is defined wherein the rotating elements of a rotor subject to differential thermal expansion and to a concentration of stresses that effect cracking and failure of the usual welded joints therebetween are replaced by pivotal connections that allow relative movement sufficient to accommodate thermal expansion and thus preclude structural failure.
  • the rotor is surrounded by a housing formed with end plates at spaced ends that have openings to simultaneously direct the heating fluid and the fluid to be heated through spaced compartments of the rotor.
  • Rotary regenerative heat exchange apparatus is effective and widely used but it is especially effective for applications having small overall size and operating at modest temperature differentials where thermal deformation is not significant.
  • This invention therefore, provides an arrangement whereby the rotor of a rotary regenerative heat exchanger is comprised of independent sector-shaped baskets pivotally supported by a rotatable rotor post whereby movement effected by thermal expansion or contraction of one element thereof is not transmitted to a member adjacent thereto, and whereby the concentration of stresses as effected by a differential of expansion does not cause the cracking or breakage of weldments and ultimate failure of the rotor structure. While the apparatus is operating under near constant conditions that do not produce excessive expansion of parts or the excessive concentration of stress, the rotor is firmly supported by the central rotor post in a manner that precludes relative movement between its component parts.
  • FIG. 1 is a sectional elevation of a heat exchanger constructed in accordance with the invention
  • FIG. 2 is an enlarged detail as seen from line 2-2 of FIG. 1 showing an arrangement by which sector-shaped rotor compartments are pivoted to the rotor post,
  • FIG. 3 is an enlarged cross-sectional view showing the details of a typical pivotal basket attachment
  • FIG. 4 is a perspective view of an individual element basket
  • FIG. 5 is a perspective view of a sealing arrangement extending around axially spaced layers of the rotor
  • FIG. 6 is a.perspective view in section of a radial seal including a cutaway side panel of an adjacent basket
  • FIG. 7 is a perspective view of a radial sealing arrangement between axially spaced basket layers.
  • the arrangement of the drawing shows a rotary regenerative heat exchanger having a horizontal rotor post 12 supported by bearings 14 and rotated about its axis by means of the drive motor 16 that is connected through a suitable reduction gearing to the rotor post.
  • a mass of heat absorbent material 18 is contained in independent, open ended, sector-shaped containers or baskets 22 are secured to the rotor post by pivotal attachments 24 to form a composite rotor 26 that upon rotation within the surrounding housing 28 is adapted to intermittently coincide with the spaced openings 32, 34, 35 and 37 in opposite ends of the surrounding rotor housing whereby fluids passing through the housing are directed through the heat absorbent material of the ro lIOI.
  • the radial inner ends of the baskets are pivotally secured by universal joints to the rotor post to permit limited relative move ment therebetween, while the radial outer ends of adjoining baskets that are subjected to little relative thermal deformation may be connected by bolts 42 into an integral annular shell that surrounds the rotor.
  • Circumferential seals 38 positioned around the end edges of the rotor and axial sealing means 44 shown in FIG. 5 of the leaf-type are held to flanges 43 at the arcuate ends of adjacent baskets so they extend outwardly and rub against the surrounding rotor housing 28 to preclude the flow of air through the space therebetween during its passage between the inlet and the outlet.
  • the bolts 42 that connect adjoining baskets also hold the axial seals 44 in position at the periphery of the rotor.
  • Sealing means 40 shown in FIG. 6 extending radially between baskets from the inner to the outer ends of the rotor are adapted to reach axially thereof sufficient to bridge the space between the adjacent end parts of the rotor and the rotor housing.
  • each basket is secured to baskets ad jacent thereto only at the ends of the arcuate outer wall so as to provide an integral annular shell extending around the rotor.
  • the radial sides of each basket are entirely independent from each adjoining basket and are thus free to expand or contract laterally without interference while each sector-shaped basket is secured by a pivotal attachment 24 to the rotor post 12 to provide adequate support therefor but to permit limited relative movement therebetween.
  • a plurality of layers of element baskets may be provided to minimize the deformation of the rotor.
  • the axially spaced layers of element may be joined by flexible sealing means 54 secured by bolts 56 to the flanges 58 that extend circumferentially around the arcuate peripheral edge of the rotor.
  • Rotary regenerative heat exchange apparatus having a central rotor post, a plurality of baskets arranged in juxtaposition around the rotor post to comprise a rotor, a mass of heat absorbent material contained in the baskets of the rotor, housing means surrounding the rotor including inlet and outlet ports for a heating fluid and a fluid to be heated, means for rotating the rotor about its axis, and pivotal connections securingbaskets to the rotor post to accommodate relative movement therebetween.
  • Rotary regenerative heat exchange apparatus having a horizontal rotor post, bearing means supporting said rotor post for rotation about its horizontal axis, a plurality of sector-shaped baskets arranged in juxtaposition around the rotor post to comprise an annular rotor, a mass of heat absorbent material carried in the baskets of the rotor, housing means surrounding the rotor having inlet and outlet ports for a heating fluid and the fluid to be heated, means for rotating the rotor about its axis whereby the sector-shaped baskets are alternately aligned with the inlet and outlet ports for the heating fluid and the fluid to be heated, means connecting the outer wall of each basket to baskets adjacent thereto to form a composite rotor with an outer annular wall concentric to the rotor post, and a pivotal coupling securing each basket to the rotor post whereby there may be relative movement therebetween.
  • Rotary regenerative heat exchange apparatus having a central rotor post as defined in claim 2 wherein the rigid annular wall around the rotor post is concentric thereto.
  • Rotary regenerative heat exchange apparatus including a central rotor post and a composite rotor shell as defined in claim 2 having radial sealing means intermediate adjacent baskets extending axially toward the end plates of the surrounding housing to bridge the leakage ath therebetween.
  • each radial sealing means is affixed to only one of the adjacent sector-shaped compartments of the rotors.
  • Rotary regenerative heat exchange apparatus including a central rotor post and a composite rotor shell as defined in claim 2 wherein the pivotal couplings joining the sector-shaped baskets to the rotor post lie at a midpoint between the edges of the face of the adjacent rotor basket.
  • Rotary regenerative heat exchange apparatus having a horizontal rotor post, a plurality of sector-shaped baskets with axially open ends arranged in radial juxtaposition around the rotor post to provide an annular basket layer, a plurality of layers of said baskets axially spaced along the rotor post, a mass of heat absorbent material carried in the baskets of the rotor, housing means including inlet and outlet ports for heating fluid and a fluid to be heated surrounding the rotor, means for rotating the rotor about its axis within the rotor housing, a universal joint securing each basket of the rotor to the rotor post, and flexible sealing means joining the arcuate periphery of the axially spaced layers of the rotor to preclude fluid leakage while permitting relative movement therebetween.
  • Rotary regenerative heat exchange apparatus as defined in claim 7 having means joining the periphery of radially adjacent baskets into an integral shell concentric with the rotor post.
  • Rotary regenerative heat exchange apparatus as defined in claim 7 including axial sealing means lying between ends of radially adjacent baskets and extending radially to bridge the space between the rotor and surrounding rotor housing to preclude fluid flow therebetween.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Air Supply (AREA)
US00168877A 1971-08-04 1971-08-04 Unrestrained rotor Expired - Lifetime US3710850A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US16887771A 1971-08-04 1971-08-04

Publications (1)

Publication Number Publication Date
US3710850A true US3710850A (en) 1973-01-16

Family

ID=22613321

Family Applications (1)

Application Number Title Priority Date Filing Date
US00168877A Expired - Lifetime US3710850A (en) 1971-08-04 1971-08-04 Unrestrained rotor

Country Status (10)

Country Link
US (1) US3710850A (enrdf_load_stackoverflow)
JP (1) JPS4825242A (enrdf_load_stackoverflow)
KR (1) KR800000074Y1 (enrdf_load_stackoverflow)
AU (1) AU463014B2 (enrdf_load_stackoverflow)
CA (1) CA969924A (enrdf_load_stackoverflow)
DE (1) DE2238140C2 (enrdf_load_stackoverflow)
ES (1) ES405472A1 (enrdf_load_stackoverflow)
FR (1) FR2148250B1 (enrdf_load_stackoverflow)
GB (1) GB1382076A (enrdf_load_stackoverflow)
IT (1) IT963651B (enrdf_load_stackoverflow)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3818978A (en) * 1972-11-13 1974-06-25 Air Preheater Inter-locking rotor assembly
US3861013A (en) * 1974-01-17 1975-01-21 Air Preheater Method of constructing a rotor for a rotary regenerative heat exchanger
US3891029A (en) * 1974-02-04 1975-06-24 Air Preheater Rotor assembly for vertical shaft air preheater
US3906606A (en) * 1974-09-12 1975-09-23 Air Preheater Erection procedure for vertical shaft air preheaters
DE2616233A1 (de) * 1975-04-14 1976-10-28 Svenska Rotor Maskiner Ab Drehspeicherwaermetauscher
US4331198A (en) * 1979-12-10 1982-05-25 Midland-Ross Corporation Rotary heat exchanger
US5048595A (en) * 1991-03-04 1991-09-17 Abb Air Preheater, Inc. Rotary regenerative air preheater basket sealing
US5540274A (en) * 1994-12-06 1996-07-30 Abb Air Preheater, Inc. Rotary regenerative heat exchanger
US5836378A (en) * 1996-06-14 1998-11-17 Abb Air Preheater, Inc. Air preheater adjustable basket sealing system
US20190154355A1 (en) * 2016-04-05 2019-05-23 Arvos Ljungstrom Llc Rotor for a rotary pre-heater for high temperature operation

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3834449A (en) * 1972-04-05 1974-09-10 Air Preheater Horizontal support for rotary regenerative heat exchanger
US3980128A (en) * 1975-06-02 1976-09-14 The Air Preheater Company, Inc. Rotor post seal
US4044822A (en) * 1976-01-08 1977-08-30 The Air Preheater Company, Inc. Horizontal modular inter-gasket seal

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3216486A (en) * 1963-09-19 1965-11-09 Air Preheater Rotary heat exchanger
US3369593A (en) * 1964-10-03 1968-02-20 Brandt Herbert Axial flow regenerative heat exchangers
GB1136087A (en) * 1964-12-17 1968-12-11 Svenska Rotor Maskiner Ab Rotary regenerative air preheater for parallel air flows
US3572425A (en) * 1969-02-13 1971-03-23 Rothemuehle Brandt Kritzler Rotary regenerative heat exchangers

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1083193A (fr) * 1952-09-10 1955-01-05 Svenska Rotor Maskiner Ab Perfectionnement aux préchauffeurs d'air

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3216486A (en) * 1963-09-19 1965-11-09 Air Preheater Rotary heat exchanger
US3369593A (en) * 1964-10-03 1968-02-20 Brandt Herbert Axial flow regenerative heat exchangers
GB1136087A (en) * 1964-12-17 1968-12-11 Svenska Rotor Maskiner Ab Rotary regenerative air preheater for parallel air flows
US3572425A (en) * 1969-02-13 1971-03-23 Rothemuehle Brandt Kritzler Rotary regenerative heat exchangers

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3818978A (en) * 1972-11-13 1974-06-25 Air Preheater Inter-locking rotor assembly
US3861013A (en) * 1974-01-17 1975-01-21 Air Preheater Method of constructing a rotor for a rotary regenerative heat exchanger
US3891029A (en) * 1974-02-04 1975-06-24 Air Preheater Rotor assembly for vertical shaft air preheater
US3906606A (en) * 1974-09-12 1975-09-23 Air Preheater Erection procedure for vertical shaft air preheaters
DE2540438A1 (de) * 1974-09-12 1976-03-25 Svenska Rotor Maskiner Ab Verfahren zur herstellung eines rotors fuer einen drehspeicher-luftvorwaermer mit senkrechter drehachse
DE2616233A1 (de) * 1975-04-14 1976-10-28 Svenska Rotor Maskiner Ab Drehspeicherwaermetauscher
US4331198A (en) * 1979-12-10 1982-05-25 Midland-Ross Corporation Rotary heat exchanger
US5048595A (en) * 1991-03-04 1991-09-17 Abb Air Preheater, Inc. Rotary regenerative air preheater basket sealing
US5540274A (en) * 1994-12-06 1996-07-30 Abb Air Preheater, Inc. Rotary regenerative heat exchanger
US5836378A (en) * 1996-06-14 1998-11-17 Abb Air Preheater, Inc. Air preheater adjustable basket sealing system
US20190154355A1 (en) * 2016-04-05 2019-05-23 Arvos Ljungstrom Llc Rotor for a rotary pre-heater for high temperature operation
US11137217B2 (en) * 2016-04-05 2021-10-05 Arvos Ljungstrom Llc Rotor for a rotary pre-heater for high temperature operation

Also Published As

Publication number Publication date
FR2148250A1 (enrdf_load_stackoverflow) 1973-03-11
CA969924A (en) 1975-06-24
GB1382076A (en) 1975-01-29
JPS4825242A (enrdf_load_stackoverflow) 1973-04-02
FR2148250B1 (enrdf_load_stackoverflow) 1976-08-13
ES405472A1 (es) 1975-09-01
AU4528572A (en) 1974-02-07
KR800000074Y1 (ko) 1980-01-28
DE2238140C2 (de) 1983-02-24
DE2238140A1 (de) 1973-02-15
AU463014B2 (en) 1975-07-10
IT963651B (it) 1974-01-21

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