• 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:
    A centrifuge shaft assembly comprising an outer shaft (44) adapted to rotate relative to a housing, an inner shaft (42) disposed at least partially within the outer shaft (44), the inner shaft (42) adapted to rotate relative to the housing and the outer shaft (44), and a lubrication conduit (60), at least a part of which extends from one end of the inner shaft (42) towards an opposed end, wherein the lubrication conduit (60) is in fluid communication with an outer surface of the inner shaft (42).
    公开号:DK201370212A1
    申请号:DK201370212
    申请日:2013-04-15
    公开日:2014-10-16
    发明作者:Elliot Tony
    申请人:Smidth As F L；
    IPC主号:
    专利说明:

    A CENTRIFUGE SHAFT ASSEMBLY FIELD OF THE INVENTION
    The invention relates to a centrifuge shaft assembly. In particular, although not exclusively, the invention relates to a centrifuge shaft assembly for a coal centrifuge,
    BACKGROUND TG THE INVENTION
    Coal centrifuges are available in the marketplace and are used to dewater fine and coarse coal, dewater reflux classifier product and dewater coal spiral product.
    Existing coal centrifuges are complex and usually have a lot of moving parts to be able to adequately dewater products. Fine coal centrifuges typically have a basket and a scroll that rotate in the same direction at differential speeds. Due to the setup of coal centrifuges, to be able to spin the basket and scroll in the same direction at differential speeds, the centrifuge requires a double shaft setup where one shaft is located within a second hollow shaft. A problem with this setup is that it is difficult to access the main shaft assembly for maintenance due to the location of the basket and scroll. If can take up to 4 hours to properly maintain the main shaft assembly.
    In some instances, failure to properly maintain the main shaft assembly can lead to catastrophic failure of the centrifuge,
    It will be clearly understood that any reference herein to background material or information, or to a prior publication, does not constitute an admission that any material, information or publication forms part of the common general knowledge in the art, or is otherwise admissible prior art , whether in Australia or any other country.
    OBJECT OF THE INVENTION
    It is an object of the invention to overcome or at least alleviate one or more of the above problems and / or provide the consumer with a useful or commercial choice. Other objects of the present invention will become apparent from the following description.
    DISCLOSURE OF THE INVENTION
    In one form, although it need not be the only or indeed the widest form, the invention resides in a centrifuge shaft assembly comprising: an outer shaft adapted to rotated relative to a housing; an inner shaft disposed at least partially within the outer shaft, the inner shaft adapted to rotate relative to the housing and the outer shaft; and a lubrication conduit, at least a portion of which extends from one end of the inner shaft toward an opposite end; whereas the lubrication conduit is in fluid communication with an outer surface of the inner shaft. A basket may be connected to the outer shaft. A scroll may be connected to the inner shaft. Alternatively, other configurations may be possible. For example, the basket connected to the inner shaft and the scroll connected to the outer shaft. Baskets and scrolls are known in the art and will not be discussed in further detail in this specification.
    The outer shaft may comprise at least one outer shaft lubrication conduit adapted to convey lubricant from a space between the inner shaft and the outer shaft to an outer surface of the outer shaft. The outer shaft lubrication conduit may be in fluid communication with a bearing operatively disposed between the outer surface of the outer shaft and the housing.
    The inner shaft may extend through the outer shaft. The inner shaft and outer shaft may be co-axiai. A bearing may be operatively disposed between the inner shaft and the outer shaft.
    The lubrication conduit may extend from a bottom end of the inner shaft towards a top end of the inner shaft. In one embodiment, the lubrication conduit extends from a bottom end of the inner shaft to a top end of the inner shaft. The lubrication conduit may be blocked by a set screw towards the top end of the inner shaft. An adapter may be in fluid communication with the lubrication conduit such that lubrication can be supplied to the lubrication conduit while the inner shaft is rotating (e.g., the adapter or at least part of the adapter is stationary while the inner shaft is rotating).
    At least one feed line may extend from the lubrication conduit to an outer surface of the inner shaft. A plurality of feed lines may extend from the lubrication conduit to the outer surface of the inner shaft. A benefit of having a plurality of feed lines is that the feed lines can be radially spaced such that the shaft is balanced. A further benefit of this is that the flow and distribution of lubricant can be improved, taking into account that any bearings disposed between the inner and outer shafts would be rotating at relatively slow speeds. A drive shaft may drive both the inner and outer shaft. The drive shaft may comprise gears which engage corresponding gears on the inner shaft and outer shaft. The gearing between the drive shaft and inner shaft and the drive shaft and outer shaft may be such that the inner shaft and outer shaft rotate in the same direction at different speeds.
    In another form, the invention relates to a method of lubricating a centrifuge shaft assembly comprising the steps of: providing an inner shaft and an outer shaft, the inner shaft having a lubrication conduit extending from one end of the inner shaft toward an opposite end and into fluid communication with an outer surface of the inner shaft, the inner shaft disposed at least partially within the outer shaft: and supplying lubricant to the lubrication conduit such that at least part of the lubricant flows to an outer surface of the inner shaft.
    The step of supplying lubricant to the lubrication conduit may include supplying the lubricant to the lubrication conduit such that at least part of the lubricant flows through a bearing operatively disposed between the inner and outer shaft.
    The step of supplying an inner and outer shaft may include supplying the outer shaft with an outer shaft lubrication conduit such that at least part of the lubricant can flow from a space between the inner and outer shaft to an outer surface of the outer shaft. The step may further include supplying a bearing operatively disposed on the outer surface of the outer shaft such that at least part of the lubricant that flows from a space between the inner and outer shaft to an outer surface of the outer shaft can flow through the bearing that is disposed on the outer surface of the outer shaft.
    The step of supplying an inner and an outer shaft may include supplying a housing that at least partially houses the inner shaft and the outer shaft.
    In a further embodiment, the invention resides in a centrifuge comprising a centrifuge shaft assembly as described in this specification.
    The centrifuge may be a vertical centrifuge. The centrifuge may be a vertical fine coal centrifuge. Alternatively, the centrifuge could be a horizontal centrifuge.
    Further features of the present invention will become apparent from the following detailed description.
    LETTER DESCRIPTION OF THE DRAWINGS
    To assist in understanding the invention and to enable a person skilled in the art to put the invention into practical effect, embodiments of the invention will be described by way of example only with reference to the accompanying drawings, wherein: FIG. 1 shows an exploded view of a coal centrifuge; FIG. 2 shows a section view of the coal centrifuge of FIG. 1; FIG. 3 shows a shaft assembly according to an embodiment of the invention; FIG. 4 shows a sectional view of the shaft assembly of FIG. 3; FIG. 5 shows a detailed view of detail B; and FIG 6 shows a detailed view of detail C,
    DETAILED DESCRIPTION OF THE INVENTION
    Figures 1 and 2 show a coal centrifuge 10 having a centrifuge housing in the form of a top cover 12 and a main frame 14. The main frame 14 houses a drive assembly 16 and a shaft assembly 40.
    The drive assembly 16 has an input shaft 18 which is connected to a drive shaft 20 by bevel gears 22 and 24. The input shaft 18 is typically driven by an electric motor or the like (not shown). The drive shaft 20 has helical gears 28 and 30.
    The shaft assembly 40 has an inner shaft 42 and an outer shaft 44. The inner shaft 42 is attached to a helical gear 46. The outer shaft 44 is attached to a helical gear 48. Helical gear 46 meshes with helical gear 28 of the drive shaft 20 and helical gear 48 meshes with helical gear 30 of the drive shaft 20, Helical gear 46 is sized differently to helical gear 48 such that inner shaft 42 and outer shaft 44 rotate in the same direction at differential speeds. A cone 32 is attached to the outer shaft 44. A spoke piece 34 is attached to the cone 32. A basket (not shown) is typically attached to the spoke piece 34. A scroll (not shown) is typically attached to the inner shaft 42. In this manner, the basket (not shown) and the scroll (not shown) rotate in the same direction at differential speeds.
    With reference to Figures 3, 4, 5 and 6, a shaft assembly 40 is shown according to an embodiment of the present invention. The inner shaft 42 extends through the outer shaft 44. A bearing 56 is disposed between the inner shaft 42 and the outer shaft 44. The outer shaft 44 is partially encased by a housing 50. Bearings 52 and 54 are disposed between the outer shaft 44 and the housing 50. A lubrication conduit 60 extends from one end of the inner shaft 42 to an opposite end of the inner shaft 42. An adapter 64 with an O-ring seal 66 is provided at the bottom end of the inner shaft 42 that lubricant (not shown) can be supplied to the lubrication conduit 60. A set screw 66 is located toward the top end of the inner shaft 42 to prevent lubricant (not shown) from expelling from the top end of the inner shaft 42. Feed lines 62 extend between the lubrication conduit 60 and an outer surface of the inner shaft 42.
    The outer shaft 44 comprises outer shaft lubrication conduits 58 extending between an inner surface of the outer shaft 44 and an outer surface of the outer shaft 44.
    In use, with reference to Figures 3, 4, 5 and 6, when the inner shaft 42 and outer shaft 44 are rotating, the lubricant (not shown) is provided to the lubrication conduit 60 via the adapter 64. It will be appreciated that the lubricant can also be provided while the shafts 42, 44 are not rotating. The lubricant (not shown) is forced up the lubrication conduit 60 and through the feed lines 62.
    Once outside the inner shaft 42, the lubricant (not shown) flows through and lubricates bearing 56. Once the bearing 56, part of the lubricant (not shown) lubricates between the inner shaft 42 and the outer shaft 44. Part of the lubricant (not shown) flows through the outer shaft lubrication conduits 58 and then flows through and lubricates bearing 52 and bearing 54. A benefit of lubricating the shaft assembly 40 in such a manner is that the shaft assembly 40 is not required to be disassembled, nor does the coal centrifuge 10 (best seen in figures 1 and 2) have to be stopped in order to lubricate the bearings 56, 52, 54 (especially bearing 56), or between the shafts 42,44.
    In this specification, adjectives such as first and second, left and right, top and bottom, and the like may be used solely to distinguish one element or action from another element or action without necessarily requiring or implying any actual such relationship or order. Where the context permits, reference to an integer or a component or step (or the like) is not to be interpreted as being limited to only one of that integer, component, or step, but rather could be one or more of that integer, component, or step etc.
    The above description of various embodiments of the present invention is provided for purposes of description to one of ordinary skill in the related art. it is not intended to be exhaustive or to limit the invention to a single disclosed embodiment. As mentioned above, numerous alternatives and variations to the present invention will be apparent to those skilled in the art of the above teaching. Accordingly, while some alternative embodiments have been discussed specifically, other embodiments will be apparent or relatively easily developed by those of ordinary skill in the art. The invention is intended to embrace all alternatives, modifications, and variations of the present invention which have been discussed herein, and other embodiments which fail within the spirit and scope of the above described invention. in the present specification and claims (if any), the word "comprising" and its derivatives including "comprises" and "company" include each of the stated Integers but does not exclude the inclusion of one or more further integers unless the context of use indicates otherwise.
    权利要求:
    Claims (10)
    [1] 1. A centrifuge shaft assembly characterized by: an outer shaft (44) adapted to rotated relative to a housing; an inner shaft (42) disposed at least partially within the outer shaft (44), the inner shaft (42) adapted to rotate relative to the housing and the outer shaft (44); and a lubrication conduit (80) in fluid communication with an outer surface of the inner shaft (42), at least a part of which extends from one end of the inner shaft (42) towards an opposed end.
    [2] 2. A centrifuge shaft assembly as claimed in claim 1, wherein the outer shaft (44) comprises at least one outer shaft lubrication conduit (58) adapted to convey lubricant from a space between the inner shaft (42) and the outer shaft (44) to an outer surface of the outer shaft (44).
    [3] 3. A centrifuge shaft assembly as claimed in claim 1 or claim 2, wherein the inner shaft (42) and outer shaft (44) are co-axial.
    [4] 4. A centrifuge shaft assembly as claimed in any one of the preceding claims, wherein the lubrication conduit (60) extends from a bottom end of the inner shaft (42) towards a top end of the inner shaft (42).
    [5] 5. A centrifuge shaft assembly as claimed in any one of the preceding claims, wherein an adapter (64) is in fluid communication with the lubrication conduit (60) such that lubrication can be supplied to the lubrication conduit (60) while the inner shaft (42) is rotating.
    [6] 6. A centrifuge shaft assembly as claimed in any one of the preceding claims, wherein at least one feed line (62) extends from the lubrication conduit (60) to an outer surface of the inner shaft (42).
    [7] 7. A method of lubricating a centrifuge shaft assembly characterized by: providing an inner shaft (42) and an outer shaft (44), the inner shaft (42) having a lubrication conduit (60) extending from one end of the inner shaft (42) towards an opposed end and in fluid communication with an outer surface of the inner shaft (42), the inner shaft (42) disposed at least partially within the outer shaft (44); and supplying lubricant to the lubrication conduit (60) such that at least part of the lubricant flows to an outer surface of the inner shaft (42).
    [8] 8. A method of lubricating a centrifuge shaft assembly as claimed in claim 8, wherein the step of supplying lubricant to the lubrication conduit (60) includes supplying the lubricant to the lubrication conduit (60) such that at least part of the lubricant flows through a bearing (56) operatively disposed between the inner (42) and outer shaft (44).
    [9] 9. A method of lubricating a centrifuge shaft assembly as claimed in claim 7 or claim 8, wherein the step of supplying an inner (42) and an outer shaft (44) includes supplying the outer shaft (44) with an outer shaft lubrication conduit (58) such that at least part of the lubricant can flow from a space between the inner (42) and outer shaft (44) to an outer surface of the outer shaft (44).
    [10] 10. A method of lubricating a centrifuge shaft assembly as claimed in claim 7, claim 8 or claim 9, wherein the step of supplying an inner (42) and an outer shaft (44) includes supplying a housing that at least partially houses the inner shaft (42) and the outer shaft (44).
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    同族专利:
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    DK177961B1|2015-02-02|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    CN2514920Y|2001-12-26|2002-10-09|山东煤矿泰安机械厂|Centrifuge for separating duff|
    DE102009050999A1|2009-10-28|2011-05-05|Schaeffler Technologies Gmbh & Co. Kg|transmission device|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DK201370212A|DK177961B1|2013-04-15|2013-04-15|A centrifuge shaft assembly|
    DK201370212|2013-04-15|DK201370212A| DK177961B1|2013-04-15|2013-04-15|A centrifuge shaft assembly|
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