US2299662A - Drying drum for the drying of felts - Google Patents

Drying drum for the drying of felts Download PDF

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Publication number
US2299662A
US2299662A US323701A US32370140A US2299662A US 2299662 A US2299662 A US 2299662A US 323701 A US323701 A US 323701A US 32370140 A US32370140 A US 32370140A US 2299662 A US2299662 A US 2299662A
Authority
US
United States
Prior art keywords
air
drying
drum
grooves
felts
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
US323701A
Other languages
English (en)
Inventor
Wilhelm Thaler
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.)
American Voith Contact Co
Original Assignee
American Voith Contact Co
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 American Voith Contact Co filed Critical American Voith Contact Co
Application granted granted Critical
Publication of US2299662A publication Critical patent/US2299662A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
    • F26B13/10—Arrangements for feeding, heating or supporting materials; Controlling movement, tension or position of materials
    • F26B13/14—Rollers, drums, cylinders; Arrangement of drives, supports, bearings, cleaning
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F5/00—Dryer section of machines for making continuous webs of paper
    • D21F5/02—Drying on cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement

Definitions

  • This invention relates to a drying drum working with blown-in air for the drying of endless cloth, especially for drier felts of paper machines.
  • the drier felts running in a paper machine need to be dried continually and most effectively and in the shortest possible tim to insure the most efficient dewatering of the paper web.
  • Well-known devices work with blown or sucked air which as drying air is sucked or blown through the felts.
  • the present invention represents a drying drum with a fundamentally different air conduct, having the air channels arranged in the outer surface of the shell of the drying drum.
  • These air channels arranged in the outer shell surface of the drying drum can be formed either as grooves parallel to the axis or as circumferential grooves.
  • both distributors can be connected with a compressor or one of the distributors with a compressor and th other with a vacuum pump. This latter arrangement gives a possibility to conduct the air with very high speed along the felt evitating completely the formation of vapours at the same time by sucking off the damp air. This fact is especially very important for paper machines.
  • the blown-in air is conducted into channels by a hood arranged at the part of the shell which is not covered by the felt.
  • a hood arranged at the part of the shell which is not covered by the felt.
  • Figure 1 shows a cross section of a drying drum with air channels on th outer shell parallel to the axis
  • Figure 2 a longitudinal section through a part of this drying drum
  • Figure 3 the joint between the drying drum and the fixed distributor head
  • Figure 4 a longitudinal section through a drying drum with air channels in form of circumferential grooves
  • Figure 5 a cross section of such a drying drum.
  • the drying drum after Figures 1-3 consists of the outer cylindrical shell I in which outer side the grooves 2 are machined parallel to the axis.
  • the drying drum is covered by the felt 3 which is led by the rolls 45.
  • the faces of the drying drum are closed in by the covers 6 on both sides. These covers close in as well the journal in the centre and eventually a steam inlet pipe.
  • the fac of the drying drum glides on the fixed distributor head 1 whose different channels 8 led in the air into the channels 2 of the revolving drying drum.
  • Carbon rings III are arranged in circumferential grooves 9 to reduce the friction and to produce a tight joint between the face of the drying drum and the distributor head.
  • special shutting off devices can be provided. By these means the size of the sector of the drying drum provided with air can be adjusted according to the surface covered by the felt.
  • the inlet hood I6 is arranged between the running on side 14 and the running out side l5 and the felt web. This hood is connected on its fronts with air inlet or air outlet pipes respectively (I 'l) When the felt is running in the direction of the arrows as indicated at I l-l5 in Figure 5 the right chamber ll of the inlet hood is connected with the compressed air line and the left chamber with the vacuum pump. By these means the blown air is conducted along the felt according to the counter-current principle. The sucking off of the air by the left chamber increases firstly the air velocity in the channels, and secondly the air can be conducted to the outside and the formation of vapours at the machine is evitated.
  • a drying machine for drying band shaped fabrics like paper machine felts the combination of a drum having a plurality of grooves on the periphery thereof formed by imperforate Walls, having inlet and outlet portions, said fabric being spaced from the grooves and resting on the intervening ridges thereof, air suction means removing the air at the outlet portions of the grooves, and air compressing means compressing air between the felt and the drum and into the inlet portions of the same grooves.
  • a drying machine for drying band shaped fabrics like paper machine felts the combination of a rotary drum having a plurality of circumferentially extending grooves on the periphery thereof formed by imperforate Walls, rotatable at least in one direction, said fabric being spaced from the grooves and resting on the intervening ridges thereof, and moving with the drum from the entrance side to the discharge side for the fabric, and suction means for removing the air in the grooves at the entrance side of the fabric, and means for supplying compressed air to the same grooves at the discharge side of the fabric, to increase the velocities of the air streams in the grooves, the air streams moving in a direction opposite to the direction of the drum.
  • a drum having a plurality of grooves formed by imperforate walls of the drum on the periphery thereof, said fabric resting on the intervening ridges between the grooves to form therewith a continuous open duct, suction means inducing air at one end of the duct and compressing means at the other end of the duct for forcing air into said end of said duct, for drying the side of the fabric exposed to the grooves, said grooves running coaxially longitudinally of the drum.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Paper (AREA)
  • Drying Of Solid Materials (AREA)
US323701A 1939-04-08 1940-03-13 Drying drum for the drying of felts Expired - Lifetime US2299662A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE218895X 1939-04-08

Publications (1)

Publication Number Publication Date
US2299662A true US2299662A (en) 1942-10-20

Family

ID=5831548

Family Applications (1)

Application Number Title Priority Date Filing Date
US323701A Expired - Lifetime US2299662A (en) 1939-04-08 1940-03-13 Drying drum for the drying of felts

Country Status (3)

Country Link
US (1) US2299662A (enrdf_load_stackoverflow)
CH (1) CH218895A (enrdf_load_stackoverflow)
SE (1) SE105320C1 (enrdf_load_stackoverflow)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2933825A (en) * 1956-11-19 1960-04-26 Paper Converting Machine Co Moisture removal system
US3073038A (en) * 1959-11-05 1963-01-15 Woodrow C Lodding Drying drum
US3074332A (en) * 1958-10-20 1963-01-22 Cons Electrodynamics Corp Drying platen for a recording system
US3098725A (en) * 1959-03-25 1963-07-23 Metal Box Co Ltd Drying liquid-coated thin metal coil stock
US3246400A (en) * 1962-06-25 1966-04-19 Bell & Howell Co Drying drum
US3659347A (en) * 1969-08-13 1972-05-02 Inventing Ab Method and means for drying moist material, such as paper, cellulose, other fibres or the like
US5103898A (en) * 1990-07-11 1992-04-14 Worldwide Converting Machinery Cooled vacuum pull roll
US6397489B1 (en) * 2000-08-25 2002-06-04 The University Of Chicago Multiport cylinder dryer with low thermal resistance and high heat transfer

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2933825A (en) * 1956-11-19 1960-04-26 Paper Converting Machine Co Moisture removal system
US3074332A (en) * 1958-10-20 1963-01-22 Cons Electrodynamics Corp Drying platen for a recording system
US3098725A (en) * 1959-03-25 1963-07-23 Metal Box Co Ltd Drying liquid-coated thin metal coil stock
US3073038A (en) * 1959-11-05 1963-01-15 Woodrow C Lodding Drying drum
US3246400A (en) * 1962-06-25 1966-04-19 Bell & Howell Co Drying drum
US3659347A (en) * 1969-08-13 1972-05-02 Inventing Ab Method and means for drying moist material, such as paper, cellulose, other fibres or the like
US5103898A (en) * 1990-07-11 1992-04-14 Worldwide Converting Machinery Cooled vacuum pull roll
US6397489B1 (en) * 2000-08-25 2002-06-04 The University Of Chicago Multiport cylinder dryer with low thermal resistance and high heat transfer

Also Published As

Publication number Publication date
CH218895A (de) 1942-01-15
SE105320C1 (enrdf_load_stackoverflow) 1942-08-25

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