US3332674A - Travelling grate machine with drive - Google Patents

Travelling grate machine with drive Download PDF

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Publication number
US3332674A
US3332674A US479769A US47976965A US3332674A US 3332674 A US3332674 A US 3332674A US 479769 A US479769 A US 479769A US 47976965 A US47976965 A US 47976965A US 3332674 A US3332674 A US 3332674A
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US
United States
Prior art keywords
frame
drive
shaft
pallets
travelling grate
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
US479769A
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English (en)
Inventor
Stanley M Coulter
Leonard J Bachman
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.)
Dravo Corp
Original Assignee
Dravo 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 Dravo Corp filed Critical Dravo Corp
Priority to US479769A priority Critical patent/US3332674A/en
Priority to NL6611442A priority patent/NL6611442A/xx
Application granted granted Critical
Publication of US3332674A publication Critical patent/US3332674A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • C22B1/16—Sintering; Agglomerating
    • C22B1/20—Sintering; Agglomerating in sintering machines with movable grates
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/02—Roasting processes
    • C22B1/08—Chloridising roasting
    • 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
    • F27B21/00—Open or uncovered sintering apparatus; Other heat-treatment apparatus of like construction
    • F27B21/06—Endless-strand sintering machines
    • 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
    • Y10T74/00—Machine element or mechanism
    • Y10T74/19—Gearing
    • Y10T74/19014—Plural prime movers selectively coupled to common output

Definitions

  • This invention relates to travelling grate machines such as are used in the sintering and pelletizing of iron ore, and particularly to the driving mechanism for such a machine.
  • a succession of separate pallets move in a generally horizontal path from a charging end to a discharge end over a series of windboxes.
  • the pallets are carried by a sprocket wheel to a return track along which they travel to the charging end.
  • the charge in the pallets is dumped.
  • the pallets are raised by a power-driven sprocket to the upper strand.
  • each pallet As each pallet in turn moves into place at the starting or charging end, it pushes the line or strand of abutting pallets ahead of it to the discharge end and the pallets being pushed from the discharge end power the sprockets that dump and lower them to the return strand. While the pallets have flanged wheels that roll on rails and support most of the weight, each pallet has at least one seal at each end that rides on a sealing strip so that air or gases will flow to and from the several windboxes through the pallets and the charge contained thereon.
  • the present invention has for its principal object to provide a drive which will eliminate the problems of alignment as heretofore encountered, and which will also distribute the driving forces so that they are not concentrated on a single tooth of the driving gear or driving pinion.
  • FIG. 1 is a fragmentary side elevation of the charging end of a travelling grate machine showing the head frame, drive shaft, and a portion of the track, parts being broken away to show a portion of the sprocket wheel and a portion of the drive wheel with the driving mechanism not shown;
  • FIG. 2 is a transverse section in the plane of line II II of FIG. 1, but with the drive gear being also shown;
  • FIG. 3 is a side elevation of the drive gear housing and the drive gear assembly
  • FIG. 4 is a top plan view of the drive shown in FIG. 3;
  • FIG. 5 is a fragmentary section in the line VV of FIG. 3;
  • FIG. 6 is a similar fragmentary view in the plane of line VI--VI of FIG. 4.
  • FIGS. 1 and 2 designates the top rails of a travelling grate machine along which the pallets 3 are moved in the direction of the arrow, and 4 are the bottom rails along which the pallets move in the'reverse direction and in inverted position toward the lifting sprockets 5 at the charging end.
  • the lifting sprockets raise the pallets from the lower level to the upper one, turning them again to the upright position as they elevate the pallets.
  • one end of the shaft projects at one side well beyond the head frame, and has a drive gear wheel 10 keyed thereto.
  • This gear wheel preferably has two sets of teeth 11 on its periphery disposed angularly to each other in herringbone fashion.
  • These bearings are fixed to the top of a drive frame 14 comprised of two parallel I-beams 15 extending horizontally below the shaft at right angles thereto, the frame extending roughly about the same distance each from the bearings 12 and 13 laterally beyond the periphery of the drive gear wheel 10.
  • a motor 20 On each end of the drive frame is a motor 20, the drive shaft 21 of which is coupled to a reducing gear schematically indicated at 22, which drives a sleeve 23 that is coupled at 24 to a pinion shaft 25 on which are two pinions 26 that mesh with the herringbone teeth of the drive gear.
  • the motors, reduction gears and pinions are matched in size, weight and power so that they are substantially in balance with each other.
  • the reducing gears, as seen in FIG. 6 are offset to one side of the longitudinal center of the frame so that the pinions 26 are in line with the drive gear 10.
  • the weight of the drive unit comprising the motor and reducing gear at each end of the beamlike drive frame counterbalance each other, and an extension 27 at one end of the drive frame is secured to a flexible cable 28 that is anchored at opposite ends, not shown, to the head frame structure or some other fixed locations to hold the drive frame from rotating about the main drive shaft on which the sprocket wheels are fixed.
  • a flexible cable is used because it will not transmit any stresses on the beam-like frame sideways or endwise due to any relative movement of the head frame in the building or to the drive shaft.
  • the suspended driving beam is balanced.
  • the frame itself is below the axis of the drive gear so that the centers of the pinions 26 are on a diameter of the driving gear, and the center of gravity of the frame is below the axis of the shaft.
  • Further stability is provided by a counterweight 30 under each end of the beam, one being about equal to the other. These further lower the center of gravity and increase the inertia of the driving frame, and while the reduction gears are offset to one side of the frame, these weights, as shown in FIG. 6, are offset to one side of the frame, thereby tending to equalize the overturning momentum about the axis of the driving frame.
  • the herringbone teeth on the pinions 26 and drive gear tend to equalize end thrust on the shaft 25, further eliminating alignment problems.
  • a travelling grate machine having upper and lower tracks along which a succession of pallets are moved and a pair of sprocket wheels at one end for elevating pallets from the lower track to the upper one, said sprocket wheels being fixed on a drive shaft having a drive gear wheel at one end, with a frame in which said shaft is journaled, the invention comprising a drive for the drive shaft, said drive comprising:
  • each pinion shaft driven by each reduction gear, each pinion shaft having a pinion thereon meshing with said drive gear wheel for rotating said wheel,
  • a travelling grate machine as defined in claim 1 in which the centers of the pinion shafts at opposite'ends of 4 the frame are diametrically opposite the center of said drive shaft.
  • a travelling grate machine as defined in claim 1 in which the centers of the pinion shafts at opposite ends of the frame are diametrically opposite the center of said drive shaft, said motors, reduction gears and pinions being of the same size and weight.
  • a travelling grate machine as defined in claim 1 in which the centers of the pinion shafts at opposite ends of the frame are diametrically opposite the center of said drive shaft, said motors, reduction gears and pinions being of the same size and weight, the reduction gears being to one side of the drive gear wheel and the longitudinal axis of the beam-like frame, and a counterweight under the beam-like frame adjacent each end thereof to lower the center of gravity of the beam-like frame and stabilize it and balance the opposite ends of the beam-like frame.
  • a travelling grate machine as defined in claim 1 in which the centers of the pinion shafts at opposite ends of the frame are diametrically opposite the center of said drive shaft, said motors, reduction gears and pinions being of the same size and Weight, the reduction gears being to one side of the drive gear wheel and the longitudinal axis of the beam-like frame, and a counterweight under the beam-like frame adjacent each end thereof to lower the center of gravity of the beam-like frame and stabilize it and balance the opposite ends of the beam-like frame, the counterweights being offset to the side of the axis of the beam-like frame opposite the side on which the reduction gears are offset to equalize the overturning momentum about the axis of the frame.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Retarders (AREA)
US479769A 1965-08-16 1965-08-16 Travelling grate machine with drive Expired - Lifetime US3332674A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US479769A US3332674A (en) 1965-08-16 1965-08-16 Travelling grate machine with drive
NL6611442A NL6611442A (xx) 1965-08-16 1966-08-15

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US479769A US3332674A (en) 1965-08-16 1965-08-16 Travelling grate machine with drive

Publications (1)

Publication Number Publication Date
US3332674A true US3332674A (en) 1967-07-25

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ID=23905347

Family Applications (1)

Application Number Title Priority Date Filing Date
US479769A Expired - Lifetime US3332674A (en) 1965-08-16 1965-08-16 Travelling grate machine with drive

Country Status (2)

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US (1) US3332674A (xx)
NL (1) NL6611442A (xx)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1495930A (en) * 1923-10-26 1924-05-27 Sing Albert William Power device
US1617561A (en) * 1926-02-05 1927-02-15 John E Greenawalt Sintering apparatus
US2518781A (en) * 1944-03-01 1950-08-15 Hindmarch Thomas Power transmission mechanism
US2670947A (en) * 1947-06-19 1954-03-02 Duncan Foundry And Machine Wor Apparatus for sintering machines
US2745659A (en) * 1955-03-28 1956-05-15 Heyl & Patterson Sintering machine
US2915167A (en) * 1955-10-18 1959-12-01 Berger Alexandre Motor driven conveyor roller
US2997608A (en) * 1958-03-03 1961-08-22 Malcolm E Musser Self-contained power transmission unit
US3141544A (en) * 1962-01-12 1964-07-21 Mcdowell Wellman Eng Co Means for controlling the movement of pallets on a sintering machine
US3213711A (en) * 1959-03-19 1965-10-26 Cross Co Drive for machine tools

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1495930A (en) * 1923-10-26 1924-05-27 Sing Albert William Power device
US1617561A (en) * 1926-02-05 1927-02-15 John E Greenawalt Sintering apparatus
US2518781A (en) * 1944-03-01 1950-08-15 Hindmarch Thomas Power transmission mechanism
US2670947A (en) * 1947-06-19 1954-03-02 Duncan Foundry And Machine Wor Apparatus for sintering machines
US2745659A (en) * 1955-03-28 1956-05-15 Heyl & Patterson Sintering machine
US2915167A (en) * 1955-10-18 1959-12-01 Berger Alexandre Motor driven conveyor roller
US2997608A (en) * 1958-03-03 1961-08-22 Malcolm E Musser Self-contained power transmission unit
US3213711A (en) * 1959-03-19 1965-10-26 Cross Co Drive for machine tools
US3141544A (en) * 1962-01-12 1964-07-21 Mcdowell Wellman Eng Co Means for controlling the movement of pallets on a sintering machine

Also Published As

Publication number Publication date
NL6611442A (xx) 1967-02-17

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