• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:

    公开号:FI20185157A1
    申请号:FI20185157
    申请日:2018-02-21
    公开日:2019-08-22
    发明作者:Mika Laurikainen
    申请人:Valmet Technologies Oy；
    IPC主号:
    专利说明:

    FIBER DRYER DRYER SWITCH
    The invention relates to a switch for the drying section of a fibrous web machine, in particular a steam and / or condensate switch, which keeps the fibrous web machine pressure-tight and allows the cylinder to rotate and pass through , wherein the clutch comprises a non-rotatably mounted clutch body comprising connections for condensate and / or steam at the end of the clutch body, an annular piston non-rotatably but spring-loaded and axially movable arranged dry seal with piston suspension and back pressure pressing the seal surfaces together.
    20185157 PRH 21 -02- 2018
    Finnish patent 103907 discloses a steam switch in which a fixed part of the steam switch comprises an axially sprung, coaxially annular piston of a cylindrical surface and a dry seal fixed to it by means of screws. At the end of the shaft, i.e. the rotating part of the steam coupling, there is a sealing plane across which the dry seal rests. Structure 30 allows small radial and angular deviations. A dry seal is usually carbon, the attachment of which to the piston is a critical point and often ruptures at the point of attachment. The inaccurate fit of the piston caused a jam, as the piston was allowed to turn and wear the cylinder.
    A piston sprung like the one mentioned above has been quite common. Often, the springs that weigh the piston also support it in the radial direction, intentionally giving some room for maneuver in the radial direction.
    Finnish patent EI 99285 (US 5098135A) discloses a medium switch representing the closest prior art. With its straight sealing surface, the piston presses a ring seal, the other side of which is spherical. Against this, the spherical support surface rotates at the end of the shaft. The solution also allows for a small radial displacement.
    The old solutions use two successive seals with straight and / or spherical sealing surfaces in different configurations.
    However, a single wear ring seal is desirable, in which case the same ring seal with its piston should be able to settle in the radial direction according to the axial deviations of the shaft.
    In some solutions, the piston is supported by a bellows-type mechanism, allowing the bellows to handle both radial and angular misalignments (US1718209, US1896062) while axially depressing the piston.
    20185157 PRH 21 -02- 2018
    In known solutions, the clutch body ends before the piston structure, in which case several ring pieces fastened to each other are used as piston / counterpart parts with their fastenings and seals.
    It is an object of the present invention to provide a more reliable and easier-to-maintain switch. The objects of the invention are achieved by a solution according to claim 1.
    The solution according to the invention completely avoids fastenings that cause point loads.
    20185157 PRH 21 -02- 2018
    The combination according to the invention has proven to be reliable in test runs. It has a spherical outwardly opening rotating sealing surface and a straight sealing surface on the axially guided piston side, as well as a floating carbon seal. A much smaller radius in the spherical sealing surface is preferably used as the silicon. The radius is only 55 to 75%, most preferably 58 to 70% of the outer diameter of the ring seal. The steep sphericity guides the ring seal well as it centers it better than before.
    In one embodiment of the invention, the piston includes a back pressure region for conducting vapor pressure behind the piston to press the carbon ring seal. In this case, the end of the annular piston has a shoulder extending to the center of the shaft, forming a sliding surface against the planar surface of the carbon ring. Between the surface extending from the shoulder seal towards the center and the extension of the clutch body, there is a back pressure area for the vapor pressure which loads the ring piston towards the carbon ring seal. It is also advantageous to provide the sliding surface of the annular piston on the extension of the clutch body to substantially the same diameter (± 3%) as the outer diameter of the carbon ring seal. The extension of the clutch body is a protrusion inside the annular piston which is confined on one surface to the steam space. Here a surprisingly compact combination is provided: the back pressure of the annular piston formation
    - extend the clutch body on the outer sliding surface of the cylinder, carrying the inner sliding surface of the ring piston.
    A particularly advantageous arrangement of the invention is obtained by applying a clutch in connection with a wire-driven cylinder. Since the angular changes and other deviations of the shaft 30 are smaller than with a gear-driven cylinder, the steam switch according to the invention is better suited for smaller deviations. In a gear-driven cylinder, the shaft extends further and all compensable deviations are larger. However, the spherical sealing surface allows for larger deviations and angular changes.
    Such a precisely fitted piston-clutch body combination is also easier to seal with a single seal arranged in an extension of the clutch body, which is preferably adjacent to said recess. The arrangement as a whole is very compact and short in axial direction. There is a small number of parts here, which helps to reduce the number of fittings and seals between the parts.
    The piston material is preferably cast iron or chromium molybdenum steel and at least its inner sliding surface and the sealing surface on the carbon ring seal side are hardened in a manner known per se. Here, it is possible to increase the compressive force from the previous one, whereby the square force of the characteristic sleep on the straight sealing surface 30a is 0.5 - 2.0 n / mm2
    The axial length of the ring piston is 25 to 40% of its outer diameter.
    20185157 PRH 21 -02- 2018
    In the following, the invention will be described with reference to the accompanying figures, which show a steam switch according to the invention and its application in connection with a cylinder of a paper machine.
    Figure 1 shows an overview of a switch according to the invention in connection with a drying cylinder
    Figure 2 shows the switch on a larger scale in cross section
    Figure 3 shows an exploded view of the switch
    The arrangement of Figure 1 corresponds to Figures 1a and 2a of the patent 103907, but here the shaft of the cylinder does not have a traction tooth.
    20185157 PRH 21 -02- 2018 wheels. Figure 1 shows a drying cylinder 10 of a paper machine rotating by the force of the wire means and resting on a bearing 18. The steam is introduced through a joint 23 formed in the body 21 of the steam / condensate switch 20 and the dew is removed through the joint 13 at the end of the body 21.
    The drying cylinder 10 comprises a jacket 10a, an end 10b and a hollow shaft 10c connected thereto. It has a central cylindrical space C for mounting coaxial steam pipe 12 and condensate pipe 11 between the non-rotating clutch 20 and the interior of the cylinder 10 in a manner known per se.
    The shaft 10c of the drying cylinder 10 is supported by said bearings 18, which support the base structure 19c through the bearing housing 19, which further supports the clutch body 21 with its flange structure 19b.
    Figure 2 shows the structure of the switch in detail, more specifically the cross-section of the switch. The coupling body 21 is supported by a flange 19b associated with the base body (the fixing bolt 31 is shown in the figure). The structure associated with the flange 19b protects the spring 27b and the carbon ring seal from dirt coming from the outside in a narrow manner 20 with access to the ring space 22.
    One end of the coupling body may be in accordance with said patent FI103907. Instead, in the clutch body 21, an annular space 22 in which the annular piston 25 is adapted to move axially so that the cylindrical surface 25a inside the annular piston is supported by the outer sliding surface 21a of the clutch body extension. These sliding surfaces 21a and 25a are formed by a precise sliding fit to each other. The seal 21c seals the sliding surface from the interior vapor pressure. The piston 25 is loaded by a spring 27a, for which the piston has a recess which guides the spring 27a together with the pin 27b.
    The vapor pressure behind the shoulder 30 provides a favorable additional load alongside the spring force, which, as the pressure increases, enhances the tight
    20185157 PRH 21 -02- 2018 more and more. In each case, the springs 27a give a basic load to the sealing surfaces 29a, 30a.
    The carbon ring seal 28 keeps the drying cylinder pressure-tight based on the sealing surfaces 30a and 29a and nevertheless allows the cylinder to rotate and the fixed piping to pass through the cylinder through the interior of its shaft. Attached to the end of the shaft 10c is an annular portion 29 in which said spherical sealing surface 29a is machined.
    The carbon ring seal 28 is positioned between the straight sealing surface 30a and the spherical sealing surface 29a according to the load of its treads 28a and 28b 10. The carbon ring seal 28 can move radially on the sealing surface 30a and the parallelism deviations of the shaft 10c receive the displacements in the spherical surface 29a. Rotation occurs in both sealing surfaces 15a, but mainly in the straight sealing surface 30a.
    The surfaces 21a and 25a between the piston 25 and the extension of the coupling body 21 are machined relative to each other as a sliding fit, for example according to the seal manufacturer's instructions. The effective axial length of the support surface 25a is 15 to 35%, most preferably 20 to 30% of the outer diameter D u of the carbon ring seal 28.
    The piston (25) is hardened in its sealing and sliding surface (30a, 21a) in a manner known per se.
    As shown in Figure 3, the steam switch comprises mainly coaxial components. All components other than the ring portion 29 to be attached to the shaft 10c and the carbon ring seal 28 are rotatable and the ring piston 25 is connected to the base through the clutch body 21. Figure 3 clearly shows a cylindrical support surface 21a supporting the annular piston 25, which 30 forms a sliding surface 21a for the inner cylindrical surface 25a of the annular piston 25. The carbon ring seal 21c is in the recesses at the end of the support surface 21a.
    The spring load of the piston 25 comprises eight springs 27a which are guided by a pin 27b in addition to the springs collapsing into a cylindrical space formed in the piston (not shown). This number of springs distributes the load more evenly and reduces its inclinations compared to a smaller number of springs. Cylindrical pins F prevent the piston 25 from rotating.
    权利要求:
    Claims (11)
    [1]
    The claims
    1. Switch for the drying section of the fibrous web machine, in particular steam and / or a condensate switch for holding the
    5 cylinder in a pressure-tight manner and yet allowing the cylinder to rotate and pass through the fixed piping (11, 12) inside the cylinder through the interior (C) of its shaft (10c), the coupling being intended to be mounted immediately outside the nearest cylinder (18) supporting the cylinder (10), wherein the clutch comprises • a non-rotatably mounted clutch body (21) comprising connections (13, 23) for condensate and / or steam at the end of the clutch body (21), and • an annular piston (25) mounted on the clutch body (21).
    15, but spring-loaded and axially movably guided by an axial cylindrical surface (21a), • a straight radial sealing surface (30a) associated with the annular piston (25), • a mating piece (29) connected to said shaft (10c), and
    20 a rotating spherical sealing surface (29a) provided therein • a floating carbon ring seal (28) arranged between said rotating spherical sealing surface (29a) and the sealing surface (30a) associated with the annular piston (25)
    25 (25) when the sealing surfaces (28a, 29a) are pressed together by suspension and back pressure, characterized in that the radius r of the spherical sealing surface (29a) is 55 to 75%, most preferably 58 to 70% times the outer diameter D u of the carbon ring seal (28).
    [2]
    Coupling according to Claim 1, characterized in that the piston (25) has a back pressure region (30b) for conducting the vapor pressure behind the shoulder (30) of the annular piston (25) to press the carbon ring seal (28).
    [3]
    Coupling according to Claim 1 or 2, characterized in that the support surface (25a) of the annular piston (25) is
    5 as a cylindrical surface as its cylindrical surface, resting on its inner diameter against the outer cylindrical surface (21a) formed in the extension of the clutch body (21).
    [4]
    Coupling according to Claim 3, characterized in that the effective axial length of the support surface (25a) is 15 to 35%, most preferably 20 to 30% of the outer diameter D u of the carbon ring seal (28).
    [5]
    Switch according to one of Claims 1 to 4, characterized in
    15 in that the material of the ring piston (25) is made of chromium molybdenum steel or cast iron.
    20185157 PRH 21 -02- 2018
    [6]
    6. Coupling according to Claim 6, characterized in that the annular piston (25) is hardened on its sliding surface (25a).
    [7]
    Coupling according to Claim 6, characterized in that the annular piston (25) is hardened on its sealing surface (30a).
    [8]
    Switch according to one of Claims 1 to 8, characterized in
    25 that the surface pressure provided by the annular piston (25) on the straight sealing surface () is 0.5-2 N / mm2.
    [9]
    Coupling according to one of Claims 1 to 9, characterized in that the axial length of the annular piston is 25 to 40% of its outer diameter.
    [10]
    An arrangement at the end of a paper machine / board machine cylinder (10), wherein the cylinder shaft (10c) is mounted by an angular displacement bearing (18) and which bearing (18) rests on its outer circumference on a base, characterized in that the arrangement has a coupling according to any one of claims 1-9, connected to a bearing (18) bearing frame (19)
    [11]
    Arrangement according to Claim 11, characterized in
    5 in that the radius r of the spherical surface is 15 to 40%, most preferably 15 to 25% of the distance L between the axial mean dimensions of the bearing (18) and the carbon ring seal (28).
    类似技术:
    公开号 | 公开日 | 专利标题
    FI68709B|1985-06-28|TRYCKBEHANDLINGSVALS
    JP2606969B2|1997-05-07|Press roll
    US4327468A|1982-05-04|Controlled deflection roll
    JP3056609U|1999-02-26|Deformation control roll
    FI78136C|1989-06-12|ROTARY EQUIPMENT.
    CA2038965C|1994-06-21|Rotary joint with axial compensation
    US3747181A|1973-07-24|Press roll
    US4206834A|1980-06-10|Brake assembly
    KR950002999B1|1995-03-29|Rotary joint with extended life seal
    FI89977B|1993-08-31|FORMREGLERBAR VALS
    FI20185157A1|2019-08-22|Coupling for a drying section of a fibre web machine
    CA1120751A|1982-03-30|Roll drive in a paper machine or equivalent
    US5018258A|1991-05-28|Support system for a variable-crown roll
    EP0499597B1|1996-12-11|Steam and condensate coupling for a drying cylinder in a paper machine
    FI64708C|1983-12-12|INVAENDIGT KOMPENSERAD ROTERANDE KOPPLING
    US4279451A|1981-07-21|Device for obtaining axial mobility and avoiding radial play of a bearing ring in relation to a bearing seat
    US2791449A|1957-05-07|Rotary self-supporting pressure joint
    CN100359095C|2008-01-02|Sealing device
    CA1076494A|1980-04-29|Brake assembly
    US3424277A|1969-01-28|Inside caliper disc brake
    WO1999051812A1|1999-10-14|Seal construction for a suction box in a suction roll
    US3946499A|1976-03-30|Heated dryer drum for paper machines and the like
    US6193639B1|2001-02-27|Deflection compensation roll
    FI12166U1|2018-09-14|Drying cylinder of a fibrous web machine
    US6543937B1|2003-04-08|Axial fitting with sliding bearings of the roll mantle of a roll of a paper/board or finishing/converting machine
    同族专利:
    公开号 | 公开日
    AT520948A2|2019-09-15|
    AT520948A3|2019-12-15|
    CN110172855B|2020-12-11|
    DE102019103069A1|2019-08-22|
    AT520948B1|2020-03-15|
    CN110172855A|2019-08-27|
    FI128250B|2020-01-31|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US1718209A|1924-11-24|1929-06-25|Beloit Iron Works|Steam fitting for journals of rotary steam cylinders or the like|
    GB341260A|1930-01-10|1931-01-15|James William Weston Evans|Improvements in doll-head bearings for drying cylinders and such like|
    US1934717A|1930-12-22|1933-11-14|George E Johnson & Company|Steam joint|
    US1896062A|1931-05-29|1933-02-07|Beloit Iron Works|Self-balancing steam fitting|
    US2208292A|1938-07-08|1940-07-16|Hanson Clutch And Machinery Co|Rotary joint|
    GB638078A|1946-10-25|1950-05-31|Papierfabrik Balsthal A G|Coupling for drying cylinder|
    DE1073963B|1957-05-07|1960-01-21|The Johnson Corporation Three Rivers Mich |Condensate suction pipe for rotating steam-heated rollers|
    FI61931C|1976-01-19|1988-03-22|Eero Artturi Irpola|Sealing structure for drying cylinder steam coupling device.|
    US4262940A|1978-12-15|1981-04-21|The Johnson Corporation|Internally compensated self-aligning rotary joint|
    JPH0360957B2|1986-02-21|1991-09-18|Mitsubishi Heavy Ind Ltd|
    US5098135A|1990-12-11|1992-03-24|The Johnson Corporation|Rotary joint with axial compensation|
    US5226677A|1991-08-09|1993-07-13|The Johnson Corporation|Rotary joint with extended life seal|
    FI103907B|1996-01-08|1999-10-15|Valmet Corp|Steam / condensation / water coupling for the cylinder in paper machine / cardboard machine|
    JP2003139246A|2001-11-01|2003-05-14|Oiles Ind Co Ltd|Spherical band seal body and exhaust pipe joint therewith|
    CN2578647Y|2002-09-12|2003-10-08|约翰逊（无锡）技术有限公司|Rotary joints|
    CN2937184Y|2006-06-20|2007-08-22|新昌县亚凯机械厂|External rotation inlet connection of pressure regulator|
    US7805857B2|2006-12-28|2010-10-05|Kadant Johnson, Inc.|Dual-purpose drying and cooling apparatus|
    US8082680B2|2008-04-28|2011-12-27|Kadant Inc.|Shoe device secured to a syphon for removing condensate|
    DE102015110988A1|2015-07-07|2017-01-12|GAT Gesellschaft für Antriebstechnik mbH|Leak-reduced rotary feedthrough|
    CN206072603U|2016-10-12|2017-04-05|山东飞越机械有限公司|New self-supporting swivel joint|
    法律状态:
    2020-01-31| FG| Patent granted|Ref document number: 128250 Country of ref document: FI Kind code of ref document: B |
    优先权:
    申请号 | 申请日 | 专利标题
    FI20185157A|FI128250B|2018-02-21|2018-02-21|Coupling for a drying section of a fibre web machine, and arrangement using it|FI20185157A| FI128250B|2018-02-21|2018-02-21|Coupling for a drying section of a fibre web machine, and arrangement using it|
    DE102019103069.2A| DE102019103069A1|2018-02-21|2019-02-07|Clutch for the dryer section of a fiber web|
    ATA50099/2019A| AT520948B1|2018-02-21|2019-02-08|CLUTCH FOR THE DRY PART OF A FIBER TRAIN|
    CN201910109688.XA| CN110172855B|2018-02-21|2019-02-11|Coupling for a fibre web dryer section|
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