WO1997023689A1 - Dispositif permettant l'introduction d'un fluide de temperature elevee dans un organe rotatif - Google Patents

Dispositif permettant l'introduction d'un fluide de temperature elevee dans un organe rotatif Download PDF

Info

Publication number
WO1997023689A1
WO1997023689A1 PCT/IT1996/000123 IT9600123W WO9723689A1 WO 1997023689 A1 WO1997023689 A1 WO 1997023689A1 IT 9600123 W IT9600123 W IT 9600123W WO 9723689 A1 WO9723689 A1 WO 9723689A1
Authority
WO
WIPO (PCT)
Prior art keywords
pipe
fluid
cooling conduit
cooling
rotating body
Prior art date
Application number
PCT/IT1996/000123
Other languages
English (en)
Inventor
Bruno Betti
Original Assignee
Deublin Italiana S.R.L.
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 Deublin Italiana S.R.L. filed Critical Deublin Italiana S.R.L.
Priority to AU62405/96A priority Critical patent/AU6240596A/en
Publication of WO1997023689A1 publication Critical patent/WO1997023689A1/fr

Links

Classifications

    • 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
    • D21F5/022—Heating the cylinders
    • D21F5/028—Heating the cylinders using steam
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G1/00—Calenders; Smoothing apparatus
    • D21G1/02—Rolls; Their bearings
    • D21G1/0226—Bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C13/00—Rolls, drums, discs, or the like; Bearings or mountings therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C37/00—Cooling of bearings
    • F16C37/007—Cooling of bearings of rolling bearings

Definitions

  • a Device for Introducing a High-Temperature Fluid into a Rotating Body A Device for Introducing a High-Temperature Fluid into a Rotating Body.
  • the invention relates to a device for introducing a high- temperature fluid into a rotating body.
  • the invention is useful in the paper industry for introducing a heat vector fluid internally of a rotating body constituted by a drying cylinder or calender of a continuous paper l ne.
  • the heat vector fluid can be for example water vapour, heat transferring oil, or the like.
  • a device comprising a pipe, destined solidly to connect with the rotating body and through which the heat vector fluid passes, and a support, situated externally of the pipe, to which the tube is rotatably coupled on special bearings.
  • a support situated externally of the pipe, to which the tube is rotatably coupled on special bearings.
  • there are two connections to the support one delivery connection and a discharge connection for the heat vector fluid.
  • sealing organs are provided, operating between the rotating pipe and the fixed support.
  • the joint is connected to the rotary body, for example a drying cylinder or calender for paper, by coaxially fixing the pipe to the body so that the joint exhibits an outlet end which opens into an inlet mouth of the rotary body.
  • the rotary body draws the pipe in its rotary motion, while a heat vector fluid, previously heated to a relatively high operating temperature, is fed to the delivery connection and, passing through the pipe, is introduced into the rotary body, transferring heat thereto.
  • a heat vector fluid previously heated to a relatively high operating temperature
  • the fluid is sent to the discharge connection through a discharge channel which is also solid in rotation with the rotary body; the discharge channel is usually located coaxially and internally of the pipe.
  • the temperature of the fluid is relatively high.
  • a relatively low vector fluid working temperature is fixed, which detracts from the performance and velocity of the industrial process, all in order to reduce to a minimum the number of the times the rotating body has to be stopped to substitute the joint bearings.
  • the maintenance halt for a drying cylinder or a calender leads to the blocking of an extremely complex and expensive plant, with a considerable ensuing economic cost .
  • the main aim of the present invention is to obviate the above drawbacks in the prior art by providing a device, constructional y simple and economical, which enables a heat vector fluid to be used at a relatively high temperature, while at the same time guaranteeing long bearing functioning times.
  • An advantage of the present invention is that a high temperature gradient between the bearings mounted on the pipe and the internal wall of the pipe itself, in direct contact with the fluid, can be obtained,
  • a further advantage is that the differentiated dilations caused during functioning due to the above-mentioned temperature gradient are compensated.
  • a still further advantage is that of collecting the heat transferring fluid which inevitably escapes through the seals between the rotating pipe and the relative fixed support, avoiding thus the loss of the fluid into the environment. Further, thanks to the present invention it is possible to prevent loss of the bearing lubricating oil into the environment.
  • figure 1 shows a lateral view of a first embodiment of the device of the invention with some parts sectioned according to line I-I of figure 2;
  • figure 2 is a lateral view from the left of figure 1, with some parts sectioned according to line 11—II of figure 1;
  • figure 3 shows a section of a detail of a second embodiment of the invention.
  • 1 denotes in its entirety a device for introducing a high-temperature fluid into a rotating body.
  • the rotating body is constituted by one of the many drying cylinders of a plant for the manufacture of paper.
  • This cylinder rotates on command about a horizontal axis x of rotation.
  • a continuous belt of paper to be dried winds partially about the external surface of the cylinder.
  • the external active surface of the cylinder is heated by means of the above- mentioned fluid.
  • the heat vector fluid can be heat transferring oil or water vapour.
  • a heater not illustrated, heats the heat transferring fluid up to a working temperature which can reach up to above 300 degrees Celsius.
  • the heated fluid through a fluid feed delivery circuit, is sent to the device 1 and thereafter introduced in to the user rotating body, whic in the example is a drying cylinder.
  • the fluid after having heated the active surface of the rotating cylinder on which a paper belt to be dried is wound, newly passes through the device 1 and returns to the heater through a discharge branch of the feed circuit.
  • the direction of the heat transferring fluid flow is denoted by arrows 14. 3 and 4 denote a delivery connection and a device discharge connection provided for connection with the delivery and discharge branches of the heat transferring fluid feed circuit.
  • the pipe 2 is rotatably coupled with rotation axis x to a support 6 to which said delivery connection 3 and the discharge connection 4 are fixed.
  • Two bearings 7 equipped with seal rings 27 are mounted between the support 6 and the pi pe 2 .
  • a heat transferring fluid return pipe (not illustrated) is arranged internally and coaxially of the pipe 2, which return pipe is in communication at one end thereof with the rotating cylinder and at another end thereof with the discharge connection 4.
  • the return pipe serves for the passage of the heat transferring fluid after it has transferred heat to the rotating cylinder.
  • Seals are provided between the feed pipe 2 and the support 6.
  • the seals comprise a frontal seal ring 8 made solid to the pipe 2 and located coaxially externally of said pipe 2.
  • a seal collar 9, coaxial to the pipe 2 is mounted on the support 6 and can be limitedly displaced axially thereto.
  • the collar 9 is kept pressed against the frontal seal ring 8 by one or more springs 10, so that a seal is made between one fixed face of the collar 9 and a rotating counterface of the ring 8.
  • Further seal means are provided, also operating on the rotating pipe, which seal means are conformed and arranged such as to isolate the heat transferring fluid delivery flow from the return flow thereof .
  • the device 1 exhibits a fin 26 made solid to the support 6 and destined to interact with a special external bracket in order to avoid rotation of the support 6.
  • annular cooling conduit 11 is provided, which is solid in rotation with the pipe 2.
  • the cooling conduit 11 exhibits an inlet 12 and an outlet 13 of a cooling fluid.
  • means for feeding the cooling fluid preferably compressed air (not illustrated) which injects a flow of refrigerating air in a channel 15 made in the breadth of the support 6.
  • the direction of the air flow is indicated by arrows 16.
  • the channel 15 opens into an annular chamber 17 afforded in a portion of frontal extemity in the support 6 and a shaped annular disc 18 fixed to the support 6.
  • the chamber 17 exhibits an annular aperture facing the inelt 12 of the cooling conduit 11.
  • a labyrinth seal 19 operates between the disc 18 and the external surface of the pipe 2.
  • An annular chamber 30 is afforded internally of the support 6, at the outlet 13 of the cooling conduit 11: said annular chamber 30 has at one end thereof an outlet 31 of the cooling air connected to the source of compressed air in such a way as to create a closed ci rcuit .
  • the path of the cooling air passes close to the sealing rings 27 and the seal zone between the frontal seal ring 8 and the seal collar 9.
  • the conformation and arrangement of the cooling fluid path is such that the flow thereof aspirates and entrains the inevitable lubrication oil and heat transferring fluid leaks exiting from the seals. In this way said fluids pollute get lost to the environment.
  • a support structure 20 operates between the two facing internal walls of the cooling conduit 11, which support structure 20 is preferably made of steel and, in the embodiment shown in figures 1 and 2, comprises a plurality of tubular elements 21 paralllel to the cooling conduit 11 and arranged internally of the conduit, side by side and in contact one with another.
  • Contact between a single tubular element 21 and said cooling conduit 11 walls occurs along two slim longitudinal zones of very limited width.
  • means for contrasting the tubular elements 21 circumferentially with respect to the cooling conduit 11. Said means for contrasting preferably comprise a stop 22 fixed to both facing internal walls of the cooling conduit 11 by means of a pin 28.
  • the stop 22 is constituted by a parel lelepi ped plate interpos tioned between two tubular elements 21, in contact there-with, and extended lengthwise about the same as the tubular elements 21.
  • the cooling conduit 11 is realized by predisposing a sleeve 29 about the portion of pipe 2 acting as a pivot, on which sleeve 29 bearings 7 are mounted, said bearings 7 having an internal diameter which is greater than the external diameter of the pipe 2, thus giving rise, between the pipe 2 and the sleeve 29, to a hollow space, open at ends thereof, which affords the cooling conduit 11. Then, internally of said hollow space, the tubular elements 21 are inserted by force to form a crown surrounding the pipe 2.
  • the dimensions of the pipe 2, the sleeve 29 and the tubular elements 21 are chosen in such a way as to realize an interference fit.
  • the bearings 7 are mounted on the sleeve 29.
  • the cooling conduit 11 and the relative path of the cooling fluid involve both bearings 7.
  • the support structure 20 comprises a corrugated element 23, preferably made of steel, having a surface composed of alternated projections 24 and recesses 25, where the projections 24 are in contact with one of the two facing internal walls describing the cooling conduit 11 , and the recesses 25 are in contact with the remaining wall.
  • the sleeve 29 is arranged about the pipe 2, creating thus a hollow space which is open at opposite ends and internally of which the corrugated element 23 is arranged with an interference fit.
  • a fixed means of contrasting (not illustrated) is arranged in the cooling conduit 11, which prevents the corrugated element 23 from moving circumferentially inside the cooling conduit 11.
  • the cooling conduit 11 is continuously fed with a cooling fluid (in the example compressed air) which follows the path indicated by arrows 16, while both the pipe 2 and the sleeve 29 external to the pipe 2 and functioning as coupling pivot of rotation, as well as the support structure 20 comprised between the pipe 2 and the sleeve ?d , are drawn in rotation by the rotating body.
  • a cooling fluid in the example compressed air
  • the heat transferring fluid at a relatively high temperature, is fed to the pipe 2 and thence introduced into the rotating body.
  • the cooling air sprays the internal and external walls of the cooling conduit 11 as well as the internal and external surfaces of the support structure 20.
  • the support structure 20, apart from having structural functions, also represents a barrier to the heat transmitted by radiation from the internal wall and the external wall of the cooling conduit 11.
  • at least a portion of the external surface of the support structure 20 is preferably mirror- smooth.
  • the heat transmitted by conduction between the walls of the cooling conduit 11 is relatively low, since the thermal bridges are limited, in substance, to the thin zones of contact between the support structure 20 and the walls of the cooling conduit 11 and the stop 22.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drying Of Solid Materials (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • Paper (AREA)

Abstract

L'invention porte sur un dispositif permettant l'introduction d'un fluide de température élevée dans un organe rotatif; ce dispositif comporte une canalisation (2) conçue pour le passage du fluide et qui est raccordée de manière rigide à l'organe rotatif. Cette canalisation est couplée par un montage rotatif, au moyen de paliers (7), à un support (6). Afin de réduire les contraintes thermiques sur les paliers (7), on alimente en liquide de refroidissement un conduit annulaire de refroidissement (11) intercalé entre les paliers (7) et la canalisation (2) et solidaire de celle-ci dans sa rotation. Ce conduit de refroidissement (11) est pourvu d'orifices d'admission (12) et d'évacuation (13) destinés au liquide de refroidissement. Le dispositif s'avère des plus utiles pour l'industrie papetière, s'agissant de faire pénétrer un fluide de transfert de chaleur dans un cylindre ou une calandre de séchage.
PCT/IT1996/000123 1995-12-22 1996-06-17 Dispositif permettant l'introduction d'un fluide de temperature elevee dans un organe rotatif WO1997023689A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU62405/96A AU6240596A (en) 1995-12-22 1996-06-17 A device for introducing a high-temperature fluid into a rotating body

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT95MO000172A IT1279895B1 (it) 1995-12-22 1995-12-22 Dispositivo per introdurre un fluido ad elevata temperatura in un corpo rotante
ITMO95A000172 1995-12-22

Publications (1)

Publication Number Publication Date
WO1997023689A1 true WO1997023689A1 (fr) 1997-07-03

Family

ID=11385976

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IT1996/000123 WO1997023689A1 (fr) 1995-12-22 1996-06-17 Dispositif permettant l'introduction d'un fluide de temperature elevee dans un organe rotatif

Country Status (3)

Country Link
AU (1) AU6240596A (fr)
IT (1) IT1279895B1 (fr)
WO (1) WO1997023689A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1256730A3 (fr) * 2001-05-10 2005-07-13 Voith Paper Patent GmbH Palier pour rouleau à calandre au ceintrage réglable
CN103712015A (zh) * 2013-12-27 2014-04-09 大连瑞谷科技有限公司 四点推力角接触式旋转接头
CN114704545A (zh) * 2022-03-28 2022-07-05 安徽孺子牛轴承有限公司 一种耐强磁不生锈的金属轴承
CN115263930A (zh) * 2022-09-22 2022-11-01 江苏华频电子科技有限公司 一种深井泵用高效冷却轴承

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59103024A (ja) * 1982-12-02 1984-06-14 Mitsubishi Heavy Ind Ltd 帯鋼加熱ロ−ル用軸受装置
EP0179730A1 (fr) * 1984-10-04 1986-04-30 Beloit Corporation Rouleau chauffé à enveloppe variable
EP0333688A2 (fr) * 1988-03-14 1989-09-20 Valmet Corporation Rouleau ou cylindre pour une machine à papier ou pour une machine de finissage du papier
EP0373828A1 (fr) * 1988-12-13 1990-06-20 Indu-Tech Enterprises Ltd. Joint tournant
EP0448730A1 (fr) * 1990-02-23 1991-10-02 Christian Maier GmbH & Co. Maschinenfabrik Pièce d'étanchéité pour le transfert d'un liquide caloporteur à une machine rotative de pression

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59103024A (ja) * 1982-12-02 1984-06-14 Mitsubishi Heavy Ind Ltd 帯鋼加熱ロ−ル用軸受装置
EP0179730A1 (fr) * 1984-10-04 1986-04-30 Beloit Corporation Rouleau chauffé à enveloppe variable
EP0333688A2 (fr) * 1988-03-14 1989-09-20 Valmet Corporation Rouleau ou cylindre pour une machine à papier ou pour une machine de finissage du papier
EP0373828A1 (fr) * 1988-12-13 1990-06-20 Indu-Tech Enterprises Ltd. Joint tournant
EP0448730A1 (fr) * 1990-02-23 1991-10-02 Christian Maier GmbH & Co. Maschinenfabrik Pièce d'étanchéité pour le transfert d'un liquide caloporteur à une machine rotative de pression

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 8, no. 220 (M - 330) 6 October 1984 (1984-10-06) *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1256730A3 (fr) * 2001-05-10 2005-07-13 Voith Paper Patent GmbH Palier pour rouleau à calandre au ceintrage réglable
CN103712015A (zh) * 2013-12-27 2014-04-09 大连瑞谷科技有限公司 四点推力角接触式旋转接头
CN114704545A (zh) * 2022-03-28 2022-07-05 安徽孺子牛轴承有限公司 一种耐强磁不生锈的金属轴承
CN115263930A (zh) * 2022-09-22 2022-11-01 江苏华频电子科技有限公司 一种深井泵用高效冷却轴承

Also Published As

Publication number Publication date
IT1279895B1 (it) 1997-12-18
AU6240596A (en) 1997-07-17
ITMO950172A0 (it) 1995-12-22
ITMO950172A1 (it) 1997-06-22

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