US3859039A - Planetary cooler for rotary tube furnace - Google Patents

Planetary cooler for rotary tube furnace Download PDF

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Publication number
US3859039A
US3859039A US443812A US44381274A US3859039A US 3859039 A US3859039 A US 3859039A US 443812 A US443812 A US 443812A US 44381274 A US44381274 A US 44381274A US 3859039 A US3859039 A US 3859039A
Authority
US
United States
Prior art keywords
holders
abutments
tube
rotary tube
adjacent
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
US443812A
Other languages
English (en)
Inventor
Otto Heinemann
Heinz-Herbert Schmits
Hans Schulz
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.)
ThyssenKrupp Industrial Solutions AG
Original Assignee
Polysius AG
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
Priority claimed from DE19732309883 external-priority patent/DE2309883C3/de
Application filed by Polysius AG filed Critical Polysius AG
Application granted granted Critical
Publication of US3859039A publication Critical patent/US3859039A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories or equipment specially adapted for rotary-drum furnaces
    • F27B7/38—Arrangements of cooling devices
    • F27B7/40—Planetary coolers

Definitions

  • a planetary cooler for a rotary tube furnace has a plurality of circumferentially spaced, individual holders extending radiallyof the furnace and in each of which [30] Foreign Application Priority Data Feb. 28, I973 Germany..........r.colour 2309883 is mounted a cooling tube.
  • First abutment means is fixed on each of the holders and second abutment means is fixed on the adjacent holder in radially abutting, circumferentially slidable relation with the first abutment means.
  • This invention relates to a rotary tube furnace and more particularly to a planetary cooler with a number of cooling tubes mounted on the periphery of a rotary tube furnace and which are affixed to the furnace casing by means of individual holders which permit thermal expansion of the cooling tubes and their holders in the peripheral direction.
  • the cooling tubes are affixed to stilt-like support members whose feet are pivotally connected to the rotary tube furnace casing (so that the cooling tubes can expand freely in the longitudinal direction), and whose outer ends are rigidly connected to the two cooling tubes located on different sides of the stilt-like support members.
  • This arrangement also has the disadvantage that the cooling tubes are not free to expand in the peripheral direction to compensate for thermal stresses.
  • the invention hereinafter disclosed is designed to avoid the aforementioned defects while providing a planetary cooler of the type initially described which is constructed in such manner that, while maintaining free expansion of the cooling tubes and of their holders in the peripheral direction, the stress on the joint between the cooling tube holders and the rotary tube furnace casing, and the stress on the rotary tube furnace casing itself are considerably reduced.
  • this objective is achieved in that the holders for adjacent cooling tubes are radially abutted against each other.
  • the tensile and pressure forces which, with the last described arrangement are transmitted to the casing of the rotary tube furnace, are compensated in the actual area of the adjacent holders so that the joint areas be tween the holders and the furnace casing, and the casing itself, are only subjected to appreciably smaller differential forces (transverse forces acting substantially radially).
  • the abutment in the radial direction of the holders for adjacent cooling tubes enables these holders and the tubes to expand thermally with freedom in the peripheral direction, with the gap between adjacent holders becoming correspondingly smaller.
  • the abutment provided in accordance with the invention is not harm ful, since the adjacent cooling tubes and their holders expand approximately equally in the radial direction.
  • FIG. 1 is a partial section through two cooling tubes of a planetary cooler in accordance with the invention.
  • FIG. 2 is a sectional detail taken on the line II-II of FIG. 1 and showing the abutment of adjacent holders.
  • cooling tubes 2, 2' etc. On the periphery of a rotary tube furnace l are mounted a number of cooling tubes 2, 2' etc. In the following description it is assumed that the axis 3 of cooling tube 2 lies at the level of the axis (not shown) of the rotary tube furnace l.
  • the cooling tube 2 and the same applies for all the other cooling tubes which are arranged in planetary fashion on the periphery of the rotary tube furnace 1, is mounted in a holder consisting of an inner holder member 4 and an outer holder member 5.
  • the inner holder member 4 is rigidly attached to the casing of rotary tube furnace l and forms a generally semi-circular aperture 4a wherein the cooling tube 2 rests.
  • the outer holder member 5 also has a generally semi-circular aperture 5a embracing the cooling tube 2, and is connected on both sides to the inner holder member 4 by jointing elements 6, 7 (for instance threaded bolts) which are only schematically indicated.
  • an abutment is provided between the holders of adjacent cooling tubes.
  • Each of these abutments has three support members 9, 10, 11, whereby the radially innermost support member 9 and the radially putermost support member 11 are connected to the holder for one cooling tube (e.g., 2), in the present case the inner holder member 4, while the central or intermediate support member 10 is connected to the inner holder for the adjacent cooling tube (e.g., 2').
  • these support members 9, 10, 11 have between them wedges l2 15 whereby irregularities in assembly can be compensated, and reliable mutual abutment of the support members 9, 10, 11 in the radial direction is ensured.
  • the thickness in the peripheral direction of the individual support members 9 11 and of the individual wedges 12 15 is less than the width of the gap 8. This dimensioning ensures that the holders for neighboring cooling tubes 2, 2' can expand peripherally in relation to each other even in the abutment area.
  • center support member 10 is beveled at an angle complementary to wedges 12 15, thus producing a very good surface joint.
  • the abutment is provided between the inner holder members 4 for adjacent cooling tubes 2, 2. It is obviously also possible within the scope of the invention to dispose the abutment between the outer holder members 5 for adjacent cooling tubes. It is, however, desirable to dispose the abutment as far as possible into the outer area of the opposite surfaces of adjacent holders, i.e., to a point as far outward as possible in the radial direction.
  • a rotary tube furnace of the like having a number of spaced, planetary cooling tubes mounted on the furnace by means of spaced, individual tube holders permitting thermal expansion of the tubes and holders in the peripheral direction, the combination of abutments on the holders of adjacent tubes, said abutments being in abutting engagement in the radial direction, said abutments each comprising at least two support members on one holder and at least one support member on the adjacent holder, said one support member being interposed between said two support members.
  • said abutments each comprise at least two support members on one holder and at least one support member on the adjacent holder, said one support member being interposed between said two support members.
  • a rotary furnace construction comprising a rotary tube, a plurality of cooling tubes encircling said rotary tube in planetary arrangement; and means mounting each of said cooling tubes on said rotary tube, said mounting means comprising an individual holder for each of said cooling tubes fixed to said rotary tube and having an aperture therein in which the associated cooling tube is accommodated, adjacent ones of said holders being spaced from each other by a gap to permit thermal expansion thereof peripherally of said rotary tube, and abutments on adjacent ones of said holders in abutting engagement radially of said rotary tube.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Furnace Details (AREA)
US443812A 1973-02-28 1974-02-19 Planetary cooler for rotary tube furnace Expired - Lifetime US3859039A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19732309883 DE2309883C3 (de) 1973-02-28 Planetenkühler

Publications (1)

Publication Number Publication Date
US3859039A true US3859039A (en) 1975-01-07

Family

ID=5873323

Family Applications (1)

Application Number Title Priority Date Filing Date
US443812A Expired - Lifetime US3859039A (en) 1973-02-28 1974-02-19 Planetary cooler for rotary tube furnace

Country Status (7)

Country Link
US (1) US3859039A (is")
JP (1) JPS5246256B2 (is")
BR (1) BR7401240D0 (is")
FR (1) FR2219392B3 (is")
GB (1) GB1421430A (is")
IT (1) IT1006235B (is")
ZA (1) ZA74223B (is")

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3975147A (en) * 1974-05-17 1976-08-17 Polysius Ag Rotary kiln
US4005980A (en) * 1974-09-19 1977-02-01 Polysius Ag Satellite tube support
US4008995A (en) * 1975-01-14 1977-02-22 Polysius Ag Rotary kiln construction
US4045161A (en) * 1974-12-13 1977-08-30 Polysius Ag Rotary kiln having a planetary row of cooler tubes
US4101268A (en) * 1975-11-17 1978-07-18 F. L. Smidth & Co. Rotary kiln with planetary cooler
WO1998005903A1 (en) 1996-08-08 1998-02-12 Westinghouse Electric Corporation Branch pipe for a rotary combustor

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3502139A (en) * 1967-03-22 1970-03-24 Smidth & Co As F L Planetary coolers for use with rotary kilns

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3502139A (en) * 1967-03-22 1970-03-24 Smidth & Co As F L Planetary coolers for use with rotary kilns

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3975147A (en) * 1974-05-17 1976-08-17 Polysius Ag Rotary kiln
US4005980A (en) * 1974-09-19 1977-02-01 Polysius Ag Satellite tube support
US4045161A (en) * 1974-12-13 1977-08-30 Polysius Ag Rotary kiln having a planetary row of cooler tubes
US4008995A (en) * 1975-01-14 1977-02-22 Polysius Ag Rotary kiln construction
US4101268A (en) * 1975-11-17 1978-07-18 F. L. Smidth & Co. Rotary kiln with planetary cooler
WO1998005903A1 (en) 1996-08-08 1998-02-12 Westinghouse Electric Corporation Branch pipe for a rotary combustor
US5845591A (en) * 1996-08-08 1998-12-08 Westinghouse Electric Corporation Branch pipe for a rotary combustor

Also Published As

Publication number Publication date
JPS49118059A (is") 1974-11-12
JPS5246256B2 (is") 1977-11-22
DE2309883A1 (de) 1974-09-12
IT1006235B (it) 1976-09-30
FR2219392B3 (is") 1977-07-15
BR7401240D0 (pt) 1974-12-31
FR2219392A1 (is") 1974-09-20
DE2309883B2 (de) 1976-01-08
ZA74223B (en) 1974-12-24
GB1421430A (en) 1976-01-21

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