• 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:
    Cooling device for cooling a sealing member (11) attached to a non-rotating part (4,20) and having a peripheral contact surface on a rotating part (1, 3, 30). An enclosed annular chamber (8) is arranged in the rotating part (1, 3, 30) radially inside about said sealing means (11). Said chamber (8) contains a quantity of cooling medium which in normal rotating operation is both liquid and gaseous, in such a way that the liquid cooling medium which is pressed through centrifugal forces against the outer wall (12) of said chamber (8) is evaporated by the heat generated by said sealing means. (11), and wherein a cooling means (14) is arranged on said rotating part (1, 3) for cooling an area or interior inside said chamber (8), so that the gaseous cooling medium is condensed by the cooling effect of said cooling means (14). The invention also relates to a centrifugal separator comprising such a cooling device (Fig. 1).
    公开号:SE0950449A1
    申请号:SE0950449
    申请日:2009-06-12
    公开日:2010-12-13
    发明作者:Peter Hagqvist；Kjell Klintenstedt
    申请人:Alfa Laval Corp Ab；
    IPC主号:
    专利说明:

    15 20 25 30 SUMMARY OF THE INVENTION An aim of the present invention is to reduce the disadvantages of the prior art mentioned above.
    This and other aims are achieved, according to the present invention, by a cooling device mentioned above which is characterized a closed ring- formed chamber arranged in the rotating member radially inside of said sealing means, where said chamber contains an amount of cooling medium which at normal rotating operation is both liquid and gaseous, such that the liquid cooling medium which by centrifugal forces is pressed towards the outer wall of said chamber is evaporated from the heat generated by said sealing means, and where a cooling member is arranged on said rotating member to cool an area radially inside of said chamber, such that the gaseous cooling medium is condensed from the cooling effect of said cooling member. ln a further embodiment of the present invention said rotating member comprise a spindle and an inner bearing ring attached to said spindle and where said chamber is arranged at least partly in said inner bearing ring, said inner bearing ring being a part of a bearing in which said spindle is journalled.
    The cooling device will then also be able to transport generated heat from the bearing and thus cool the same. ln another embodiment of the present invention said chamber also is defined by a locking ring which is arranged axially beside the inner bearing ring. 10 15 20 25 30 ln yet another embodiment of the present invention said locking ring has a side wall with a ring-formed lip protruding axially into said groove to increase the contact area inside the ring-formed chamber. ln a further embodiment of the present invention said inner bearing ring has a ring-formed lip protruding axially into said groove to increase the contact area inside the ring-formed chamber. In another embodiment of the present invention said cooling member is a cooling fins arranged on said locking ring functioning as fan shovels. ln yet another embodiment of the present invention said spindle is journalled in two bearings arranged in parallel on said spindle and forming a bearing unit. In another embodiment of the present invention said spindle is a hollow spindle. In another embodiment of the present invention said rotating member comprises a hollow spindle and an inner bearing ring and said closed ring-formed chamber is coaxially on the inner surface of the hollow spindle.
    One application is a centrifugal separator comprising a cooling device according to the present invention, wherein a separator bowl is attached to said rotating member. 10 15 20 25 30 BRIEF DESCRIPTION OF THE DRAWING Fig. 1 discloses a side sectional view of a first embodiment of the cooling device according to the present invention.
    Fig. 2 discloses a side sectional view of a second embodiment of the cooling device according to the present invention.
    Fig. 3 discloses a side sectional view of a third embodiment of the cooling device according to the present invention.
    DESCRIPTION OF PREFERRED EMBODIMENTS OF THE INVENTION One preferred embodiment of a device according to the present invention is illustrated in Fig. 1. This drawing discloses a rotating spindle 1 which is rotatably mounted in an apparatus foundation (not shown) by a bearing 2.
    The bearing comprises an inner bearing ring 3 fixedly mounted on the envelope surface of the spindle 1, an outer bearing ring 4 fixedly mounted on the foundation and roller means 5 thereinbetween. On each side of the inner bearing ring 3 is a locking ring 6 arranged. The inner bearing ring 3 has a ring-formed axial groove 7 in each axial end whose axial depth is not deep enough to affect the area radially inside the bearing roller means 5. As the invention is meant to be arranged in a centrifugal separator the spindle 1 has a separator bowl (not shown) fixedly attached to it which thus is rotating together with the spindle 1.
    Each locking ring 6 together with the inner bearing ring 3 defines a sealed off ring-formed chamber 8 thus circumscribed by a circular side wall 9 of the locking ring 6 facing the inner bearing ring 3 and the groove 9 in the inner bearing ring 3. The circular side wall 9 of the locking ring 6 has a ring-formed lip 10 protruding into the groove 7 to increase the contact 10 15 20 25 30 area, ie the heat exchanging surface, inside the ring-formed chamber 8.
    On each side of the roller means 5 is a sealing means 11 arranged sealing off said roller means 5 from dirt coming from the outside and also keeping the grease within the bearing 2. The sealing means 11, which is a lip sealing, is fixedly arranged on a sleeve attached to the outer bearing ring 3, but may instead be attached directly to the outer bearing ring 3 and is in sealing contact with the inner bearing ring 4 and thus non-rotatable when the spindle 1 rotates. The location of the sealing means 11 is essentially radially outside the ring-formed chamber 8.
    Said ring-formed chamber 8 is partly filled with a liquid fluidused as cooling medium, preferably water, which at normal operating conditions, i.e. when the spindle 1 is rotating at operating speed, is partly in liquid phase, partly gaseous.
    The operating mode of the present invention in accordance with the embodiment illustrated in Fig. 1 is described below.
    When the spindle 1 and the separator bowl starts to rotate, the liquid in the ring-formed chambers 8 on each side of the bearing 2 is pressed, by the centrifugal forces from the rotation of the spindle 1 and thus the ring-formed chambers 8 , towards the radially outer wall 12 of the groove. This said outer wall 12 is in immediate vicinity of the lip sealing which soon adapts a high operating temperature. This temperature starts to heat the cooling medium in the chamber 8 which soon starts to evaporate. This is especially true since the separator bowl when in operation may rotate at 5,000 to 15,000 rpm and over.
    The evaporated cooling medium is gathering in the chamber 8 radially inside the cooling medium layer close to the inner wall 13 of the groove 7 due to lower density. There the temperature is lower and even low 10 15 20 25 30 enough to condense the vapor to liquid again. The condensing is made more effective by the protruding ring-formed lip 10 of the locking ring 6 enlarging the condensing area of the chamber 8. The condensed cooling medium is then transported by the centrifugal effect back towards the outer wall 12 for a new evaporation- condensation cycle.
    Due to the closeness of the outer wall 12 to the roller means 5 the friction heat created in the bearing 2 will to a large extend also be transported through the inner bearing ring 3 towards the inner wall 12 where the cooling by the evaporation process takes place . Thus the roller means 5 will also be cooled by the heat exchanging process of the present inven fi on. ln order to increase the cooling effect at the inner wall 13 the exterior of the locking ring 6 is provided with cooling fins 14 in an area functioning as fan shovels when the spindle rotates, outside of the sealed off area between the two sealing means 11, and facing away from the sealing means 11 and the roller means 5 thus communicating with and cooled by the air outside of the sealed off area.
    A second preferred embodiment of an apparatus according to the present invention is illustrated in Fig. 2. This drawing discloses a rotating spindle 1 which is rotatably mounted in an apparatus foundation 20 by a first bearing 2a and second bearing 2b arranged beside each other axially.
    The two bearings 2a, 2b each have an inner bearing ring 3 fixedly mounted on the envelope surface of the spindle 1, and an outer bearing ring 4 fixedly mounted on the foundation 20 and roller means 5 thereinbetween. At each of the two outer ends of the inner bearing rings 3 is a locking ring 6 arranged. The inner bearing ring 3 has a ring-formed axial groove 7 in each axial end whose axial depth is not deep enough to 10 15 20 25 30 reach the area radially inside the bearing roller means 5. On the spindle 1, is a separator bowl (not shown) fixedly attached and thus rotatable together with the spindle 1.
    Each locking ring 6 together with its corresponding inner bearing ring 3 define a sealed off ring-formed chamber 8 thus circumscribed by a circular side wall 9 of the locking ring 6 facing the inner bearing ring 3 and the groove 7 in the inner bearing ring 3 The circular side wall 9 of the locking ring 6 has a circular lip 10 protruding into the groove 7 to increase the contact area, ie. the heat exchanging surface, inside the ring- formed chamber 8. On each end of the bearing arrangement comprising the first and second bearing 2a, 2b is a sealing means 11 arranged sealing off said roller means 5 by being arranged between said inner and outer bearing ring 3, 4. The sealing means 11 which is a lip sealing is fastened in the outer bearing ring 4 and is thus non-rotatable and in contact with said inner bearing ring 3. The location of the lip sealing is just radially outside the ring -formed chamber 8. Between the two inner bearing rings 3 is a first ring-formed elastic element 21 arranged to be able to absorb axial forces from the bearings 2a, 2b. Between the two outer bearing rings 4 is a second ring-formed elastic element 22 arranged also to be able to absorb axial forces from the bearings 2a, 2b.
    The inner and outer bearing rings 3, 4 together with the two sealing means 11 enclosing the bearing arrangement comprising first and second bearings 2a, 2b provide a double bearing unit which is encapsulated from the outside from dirt and other contamination.
    Said ring formed chamber 8 is partly filled with a liquid fluid, preferably water, which at normal operating conditions, i.e. when the spindle 1 is rotating at operating speed, still is partly in liquid phase. The operating mode of the embodiment according to Fig. 2 is identical to Fig. 1.
    A third preferred embodiment of an apparatus according to the present invention is illustrated in Fig. 3. This drawing discloses a rotating hollow spindle 30 which is rotatably mounted in an apparatus foundation (not shown) by a bearing 2. The bearing 2 comprises an inner bearing ring 3 fixedly mounted on the envelope surface of the hollow spindle 30, and an outer bearing ring 4 fixedly mounted on the foundation and roller means 5 thereinbetween. The hollow spindle 1 has a sealed off ring-formed chamber 8 arranged coaxially on its inner surface 31. The location is radially inside the inner bearing ring 3. On the spindle 30, is a separator bowl (not shown) fixedly attached and thus rotatable together with the spindle 30.
    On each side of the roller means 5 is a sealing means 11 arranged sealing off said roller means 5 from dirt coming from the outside and also keeping the grease within the bearing 2. The sealing means 11, which is a lip sealing, is fixedly arranged on a sleeve attached to the outer bearing ring 3, but may instead be attached directly to the outer bearing ring 3 and is in sealing contact with the inner bearing ring 4 and thus non-rotatable when the spindle rotates. The location of the sealing means 11 is essentially radially outside the ring-formed chamber 8.
    Said ring-formed chamber 8 is partly filled with a liquid fluid, preferably water, which at normal operating conditions, i.e. when the hollow spindle 30 is rotating at operating speed, is partly in liquid phase, partly gaseous. 10 15 20 25 Said ring-formed chamber 8 is defined by end rings 32 arranged axially on each side of the chamber 8. Each end ring 32 has a circular lip 33 protruding axially into the chamber 8 to increase the contact area inside the same, ie the heat exchanging surface. On each end of the bearing 2 is a sealing means 11 arranged sealing off said roller means 5 by being arranged between said inner and outer bearing ring 3, 4. The sealing means 11 which is a lip sealing is fastened in the outer bearing ring 4 and is thus non-rotatable and in contact with said inner bearing ring 3. The location of the lip sealing is radially outside the ring-formed chamber 8.
    The exterior of the end rings 32 is provided with cooling fins 34 in an area functioning as fan shovels when the spindle rotates, communicating with and being cooled by the air outside of the chamber 8.
    The operating mode of the embodiment according to Fig. 3 is identical to Fig. 1.
    As has been indicated the invention operates with good effect in separator applications but may well be used in other types of rotating systems where excessive heat release from friction in sealing means between the spindle or axle and the non-rotatable part or from bearing means. Such systems may include pumps, fans, electric motors etc. lt is evident that many alternatives, modifications and variations of the present invention will be apparent to a person skilled in the art in light of this disclosure and all such alternatives, modifications and variations are intended to be included within the scope of the appended claims.
    权利要求:
    Claims (10)
    [1]
    Cooling device for cooling a sealing means (1 1) fixed in a non-rotatable member (4, 20) and having contact with a circumferential surface of a rotating member (1, 3, 30), characterized by a closed ring - formed chamber (8) arranged in the rotating member (1, 3, 30) radially inside of said sealing means (11), where said chamber (8) contains an amount of cooling medium which at normal rotating operation is both liquid and gaseous , such that the liquid cooling medium which by centrifugal forces is pressed towards the outer wall (12) of said chamber (8) is evaporated from the heat generated by said sealing means (11), and where a cooling member (14) is arranged on said rotating member (1, 3, 30) to cool an area radially inside of said chamber (8), such that the gaseous cooling medium is condensed from the cooling effect of said cooling member (14).
    [2]
    Cooling device according to claim 1, wherein said rotating member (1, 3) comprises a spindle (1) and an inner bearing ring (3) attached to said spindle (1) and where said chamber (8) is arranged at least partly in said inner bearing ring (3), said inner bearing ring (3) being a part of a bearing (2, 2a, 2b) in which said spindle (1) is journalled.
    [3]
    Cooling device according to claim 2, wherein said chamber (8) also is defined by a locking ring (6) which is arranged axially beside the inner bearing ring (3).
    [4]
    Cooling device according to claim 3, wherein said locking ring (6) has a side wall (9) with a ring-formed lip (10) protruding axially into said groove (7) to increase the contact area inside the ring-formed chamber (8). 10 15 20 11
    [5]
    Cooling device according to claim 3, wherein said inner bearing ring (3) has a ring-formed lip protruding axially into said groove (7) to increase the contact area inside the ring-formed chamber (8).
    [6]
    Cooling device according to any one of the preceding claims, wherein said cooling member (14) comprises cooling fins arranged on said locking ring (6) functioning as fan shovels.
    [7]
    Cooling device according to any one of claims 2-6, wherein said spindle (1) isjournalled in two bearings (2a, 2b) arranged in parallel on said spindle (1) and forming a bearing unit.
    [8]
    Cooling device according to any one of claims 2-7, wherein said spindle (1) is a hollow spindle.
    [9]
    9. Cooling device according to claim 1, wherein said rotating member (3, 30) comprises a hollow spindle (30) and an inner bearing ring (3) and wherein said closed ring-formed chamber (8) is coaxially on the inner surface (31) of the hollow spindle (30).
    [10]
    Centrifugal separator comprising a cooling device according to any one of the previous claims, wherein a separator bowl is attached to said rotating member (1, 3, 30).
    类似技术:
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    US3035875A|1962-05-22|Cooling of rotary components
    同族专利:
    公开号 | 公开日
    US9416877B2|2016-08-16|
    US20120138519A1|2012-06-07|
    EP2440815A1|2012-04-18|
    WO2010144022A1|2010-12-16|
    EP2440815A4|2016-06-15|
    SE534374C2|2011-07-26|
    EP2440815B1|2019-01-09|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE2019956A1|1970-04-24|1971-11-04|Siemens Ag|Arrangement for cooling rotating bodies|
    DE2220266A1|1972-04-25|1973-11-08|Siemens Ag|ARRANGEMENT FOR COOLING THE RUNNER OF AN ELECTRIC MACHINE USING A HEAT PIPE|
    US3829233A|1973-06-27|1974-08-13|Westinghouse Electric Corp|Turbine diaphragm seal structure|
    US4198064A|1978-10-31|1980-04-15|Gustav Huhn Ab|Shaft seal|
    DE2918148C2|1979-05-05|1988-02-04|Kernforschungszentrum Karlsruhe Gmbh, 7500 Karlsruhe, De|
    JPS6137858B2|1979-05-29|1986-08-26|Hitachi Ltd|
    JPS5751018A|1980-09-09|1982-03-25|Toshiba Corp|Thrust bearing device|
    JPS5776320A|1980-10-30|1982-05-13|Nakamuratome Seimitsu Kogyo Kk|Cooling device for bearing part|
    JPS58178013A|1982-04-09|1983-10-18|Hitachi Seiko Ltd|Thermal displacement reducing device for rotary shaft|
    SE439961B|1983-04-22|1985-07-08|Alfa Laval Separation Ab|Suspension device for a rotatable spindle|
    FI76193C|1986-12-08|1988-09-09|Ahlstroem Oy|sealing systems|
    US5046920A|1989-02-23|1991-09-10|Fuji Electric Co., Ltd.|Bearing cooling system in horizontal shaft water turbine generator|
    US5201196A|1991-06-04|1993-04-13|Wright State University|Centrifugal heat pipe vapor absorption heat pump|
    DE4135709C1|1991-10-30|1993-05-19|Blohm + Voss Ag, 2000 Hamburg, De|
    DE19633651A1|1996-08-21|1998-02-26|Leybold Vakuum Gmbh|Dry vacuum machine with shaft passage|
    US6210042B1|1997-06-19|2001-04-03|Qian Wang|Isothermal journal bearing|EP3257587B1|2016-06-14|2018-12-26|Alfa Laval Corporate AB|Centrifugal separator with dismountable bowl-hood|
    CN107327499B|2017-07-12|2019-07-26|安徽利达汽车轴承制造有限公司|It is a kind of to facilitate cooling rolling bearing units|
    DE102019214793A1|2019-09-26|2021-04-01|Zf Friedrichshafen Ag|Arrangement for mounting and sealing a rotor shaft|
    CN112080304B|2020-10-08|2021-11-09|山东沂南园区开发建设有限公司|Special sealing friction pair for waste tire pyrolysis reaction furnace|
    法律状态:
    2022-01-25| NUG| Patent has lapsed|
    优先权:
    申请号 | 申请日 | 专利标题
    SE0950449A|SE534374C2|2009-06-12|2009-06-12|Cooling device for spindle seal and / or bearing means|SE0950449A| SE534374C2|2009-06-12|2009-06-12|Cooling device for spindle seal and / or bearing means|
    US13/377,378| US9416877B2|2009-06-12|2010-06-11|Cooling device for spindle sealing and/or bearing means|
    PCT/SE2010/000165| WO2010144022A1|2009-06-12|2010-06-11|Cooling device for spindle sealing and/or bearing means|
    EP10786439.9A| EP2440815B1|2009-06-12|2010-06-11|Cooling device for spindle sealing and/or bearing means|
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