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CN100366866C - 涡轮叶片的阻尼器销及其加工方法 - Google Patents

涡轮叶片的阻尼器销及其加工方法 Download PDF

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Publication number
CN100366866C
CN100366866C CNB2004100082402A CN200410008240A CN100366866C CN 100366866 C CN100366866 C CN 100366866C CN B2004100082402 A CNB2004100082402 A CN B2004100082402A CN 200410008240 A CN200410008240 A CN 200410008240A CN 100366866 C CN100366866 C CN 100366866C
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scallop section
damper pin
section
scallop
blade
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CN1525047A (zh
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J·Z·王
J·C·谢菲尔
I·R·克罗克
C·L·辛斯
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General Electric Co
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/12—Blades
    • F01D5/22—Blade-to-blade connections, e.g. for damping vibrations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
    • F01D11/005—Sealing means between non relatively rotating elements
    • F01D11/006—Sealing the gap between rotor blades or blades and rotor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/12—Blades
    • F01D5/26—Antivibration means not restricted to blade form or construction or to blade-to-blade connections or to the use of particular materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2230/00—Manufacture
    • F05D2230/60—Assembly methods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2250/00—Geometry
    • F05D2250/20—Three-dimensional
    • F05D2250/29—Three-dimensional machined; miscellaneous
    • F05D2250/291—Three-dimensional machined; miscellaneous hollowed
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S416/00—Fluid reaction surfaces, i.e. impellers
    • Y10S416/50—Vibration damping features

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)

Abstract

一种用于涡轮机中的叶片阻尼器槽的阻尼器销，其包括：成形为可装到叶片阻尼器槽中的槽插入端(12)；以及至少一个在槽插入端之间形成或加工出的第一扇形凹部(14)，其成形为可容纳叶片高C点处的叶柄腔的径向轮廓。还可在槽插入端之间相对于第一扇形凹部在直径上相对且反对称地形成或加工出第二扇形凹部(16)。

Description

涡轮叶片的阻尼器销及其加工方法
技术领域
本发明涉及涡轮叶片的阻尼器销，更具体地涉及通过在叶片阻尼器销中设置扇形凹部来消除或减轻高C凹陷(Hi-C undercut)。
背景技术
在涡轮叶片中的给定截面上，气流在翼型凸面上倒转其方向的点称为翼型的高C点。尤其令人关注的是，高C点通常位于根部截面上，其通常称为根部高C点，这是因为这一位置处的应力通常大于其周围位置处的应力。参见图1，对于因实际情况的约束而具有较窄的叶片间距的叶片来说，高C点的位置会使得在加工棒形阻尼器销的槽时，在紧接叶根缘板之下的高C位置处不可避免会存在凹陷2(见图2中的虚线)。高C位置通常是高应力的位置，并且凹陷2会通过Kt效应和壁厚的减小而进一步增大这一位置处的应力。例如，分析已经指出，对于特定的叶片/阻尼器的几何形状，Kt可以高达5.0。
在美国专利US4088421中公开了阻尼器销的一个例子。在该文献中提供了一种用于涡轮机的盖板式阻尼装置，其中在相邻的叶根缘板之间在其下方延伸的阻尼器销形成有一个或多个偏心质量体，其可在离心力的作用下导致销旋转而与盖板对接。在一个实施例中，销包括有颈部或截面减小部分，其由两个轴向间隔开的偏心质量体之间的凹槽形成。该偏心质量体显示为整体式铸成的矩形突起。该颈部的大小、偏心质量体的重量和重心位置以及销材料的特性选择成使得颈部可以扭转，从而允许颈部的两轴向侧的大致圆柱形的销部之间产生相对旋转。这样，即便在盖板之间的尺寸重叠存在着误差，也可以在销的各端部处产生对接。然而，该文献并未在高C凹陷方面提供相应的解决手段。
因此，需要构造一种可避免凹陷并能提供易于安装的装配几何形状的涡轮叶片的阻尼器销。
发明内容
在本发明的一个代表性实施例中，提供了一种用于涡轮机中的叶片阻尼器槽的阻尼器销。该阻尼器销包括：成形为可装到叶片阻尼器槽中的槽插入端；以及至少一个在槽插入端之间形成或加工出来的第一扇形凹部，其成形为可容纳叶片高C点处的叶柄腔的径向轮廓。还可在槽插入端之间相对于第一扇形凹部在直径上相对且反对称地形成或加工出第二扇形凹部。
在本发明的另一代表性实施例中，构造用于涡轮机中的叶片阻尼器槽的阻尼器销的方法包括步骤：(a)形成可装到叶片阻尼器槽中的槽插入端；以及(b)在槽插入端之间加工出第一扇形凹部。该第一扇形凹部成形为容纳叶片高C点处的叶柄腔的径向轮廓。
附图说明
图1是显示了高C凹陷的涡轮叶片的正视图；
图2是沿图1中线2-2的截面图；
图3是本发明的具有扇形凹部的阻尼器销的平面图；
图4是沿图3中线4-4的截面图；
图5是图3所示阻尼器销的侧视图；
图6是沿图5中箭头6的端视图；
图7和8是具有扇形凹部的阻尼器销的阴影平面图和侧视图；
图9是沿图3中线4-4的图4截面的放大视图；
图10显示了安装在叶片阻尼器槽中的阻尼器销；和
图11是在阻尼器处于其工作状态时通过高C点的截面图。
在图中的各标号含义如下：10阻尼器销；12槽插入端；14第一扇形凹部；16第二扇形凹部；18槽面。
具体实施方式
参见图3-8，阻尼器销10包括槽插入端12和至少一个形成于槽插入端12之间的第一扇形凹部14。第二扇形凹部16优选在槽插入端12之间相对于第一扇形凹部14在直径上相对且反对称地形成。如所示，例如在图3和7中，通过以反对称的结构设置第一扇形凹部14和第二扇形凹部16，就可将阻尼器销10以任何方向插入到叶片阻尼器槽中。这例如可见图10。
为了方便扇形凹部14，16的加工，扇形凹部14，16最好在两端为马蹄形或U形，并在中心处过渡成基本上平坦的平面。图4和9显示了阻尼器销10的通过扇形凹部14，16的截面的详细情况。各扇形凹部14，16的槽面18被加工成在制造和装配误差内与高C位置处的叶柄腔的径向轮廓基本上平行。作为示例，对于一个具体的设计而言，扇形凹部的槽面角度相对于图9所示平面X成约12度。当然，这个值只是说明性的，本发明并不意味着局限于所示例子。
图10和11显示了安装在叶片阻尼器槽中的阻尼器销10。在装配状态下，阻尼器10在叶柄内的径向间隙c应当使其在考虑了制造和装配误差的情况下不会产生热粘接和热生长。当将两个相邻叶片装配到叶轮中时就形成了叶片阻尼器槽。阻尼器销10的插入端12支撑于叶片阻尼器槽内。阻尼器端部12的形状和槽最好设计成能在工作过程中保证密封和摩擦阻尼。
利用本发明的具有扇形凹部的叶片阻尼器销就可以避免涡轮叶片的翼型根部高C点处的凹陷。因此，可以避免在关键应力位置处因高C凹陷而引起的Kt应力。另外，通过设置第二扇形凹部，可以方便将阻尼器放置在叶轮的叶片组件中。
虽然在上文中已经参考被认为是最实际且最优选的实施例来介绍了本发明，然而应当理解，本发明并不局限于所公开的实施例，相反，本发明期望覆盖包含在所附权利要求的精神和范围内的各种修改和等效设置。

Claims (9)

1.一种用于涡轮机中的叶片阻尼器槽的阻尼器销，包括：
成形为可装到所述叶片阻尼器槽中的槽插入端(12)；以及
形成于所述槽插入端之间的第一扇形凹部(14)，所述第一扇形凹部(14)成形为可容纳叶片高C点处的叶柄腔的径向轮廓。
2.根据权利要求1所述的阻尼器销，其特征在于，所述阻尼器销还包括第二扇形凹部(16)，所述第二扇形凹部(16)在所述槽插入端(12)之间相对于所述第一扇形凹部(14)在直径上相对且反对称地形成，所述第二扇形凹部(16)成形为可容纳叶片高C点处的叶柄腔的径向轮廓。
3.根据权利要求2所述的阻尼器销，其特征在于，所述第一和第二扇形凹部(14，16)为U形的。
4.根据权利要求3所述的阻尼器销，其特征在于，所述第一扇形凹部(14)的中心和所述第二扇形凹部(16)的中心为平坦的表面。
5.根据权利要求4所述的阻尼器销，其特征在于，所述第一扇形凹部(14)的槽面(18)和所述第二扇形凹部(16)的槽面(18)在制造及装配误差内与所述叶柄腔的径向轮廓平行。
6.根据权利要求1所述的阻尼器销，其特征在于，所述第一扇形凹部(14)为U形的。
7.一种构造用于涡轮机中的叶片阻尼器槽的阻尼器销的方法，包括：
(a)形成可装到所述叶片阻尼器槽中的槽插入端(12)；以及
(b)在所述槽插入端之间加工出第一扇形凹部(14)，所述第一扇形凹部成形为可容纳叶片高C点处的叶柄腔的径向轮廓。
8.根据权利要求7所述的方法，其特征在于，所述方法还包括：
(c)在所述槽插入端(12)之间相对于所述第一扇形凹部(14)在直径上相对且反对称地加工出第二扇形凹部(16)，所述第二扇形凹部(16)成形为可容纳叶片高C点处的叶柄腔的径向轮廓。
9.根据权利要求7所述的方法，其特征在于，所述步骤(b)是通过将所述第一扇形凹部(14)加工成U形来实现的。
CNB2004100082402A 2003-02-27 2004-02-27 涡轮叶片的阻尼器销及其加工方法 Expired - Fee Related CN100366866C (zh)

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US10/373,757 US6776583B1 (en) 2003-02-27 2003-02-27 Turbine bucket damper pin

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106150560A (zh) * 2015-05-14 2016-11-23 通用电气公司 具有带槽道的销的涡轮叶片阻尼系统
CN106150560B (zh) * 2015-05-14 2020-06-09 通用电气公司 具有带槽道的销的涡轮叶片阻尼系统

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EP1452692B1 (en) 2012-07-25
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EP1452692A2 (en) 2004-09-01
JP2004257391A (ja) 2004-09-16
US6776583B1 (en) 2004-08-17

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