• 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 torsional frequency adjustment device for a rotating body, the torsion frequency adjustment device comprising: a first ring (110) having a first engagement surface (111) parallel to an outer surface of the rotating body, the first engagement surface having a total arc length, which is smaller than a circumference of the outer surface (12) of the rotating body (10), the first ring further having a first wedge surface (112) inclined at a first angle with respect to the first engagement surface (111); a second ring (120) having a second wedge surface (122) corresponding to and selectively engaged with the first wedge surface (112), a total arc length of the second wedge surface (122) being less than a full arc length of the first A wedge surface (112) at each respective point along a common longitudinal axis of the first and second rings; and generating means (130) selectively engaging the first wedge surface (112) with the second wedge surface (122), thereby effecting an interference fit of the first engagement surface (111) with the outer surface (12) of the rotating body (10).
    公开号:CH709626B1
    申请号:CH01325/15
    申请日:2013-03-15
    公开日:2017-02-15
    发明作者:Arthur Lupe Douglas；Edward Adis William；Edward Deallenbach Robert；Muhittin Dede Mehmet；Korabik Andrzej；Matthew Rothe Noah
    申请人:Gen Electric；
    IPC主号:
    专利说明:

    Background to the invention
    The disclosure generally relates to the adjustment of a torsional resonant frequency of a rotating body, such as a gas or steam turbine rotor, and more particularly to the adjustment of an inertial moment and / or mass of such a rotating body to tune or adjust such a torsional resonant frequency.
    In operation of rotating machinery, particularly in power turbine operation, it is sometimes desirable to vary a torsional resonance frequency of one or more rotating elements of the machines to avoid excessive vibration and / or damage and / or machine failure during operation to avoid. Current solutions to accomplish this usually add mass to a rotor or the like by adding a mass ring. However, the process includes removing the rotor from its half shell or housing so that the mass ring can be heated, placed at a desired mounting location on the rotor, and cooled to form a shrink fit of the mass ring on the rotor. Removal of the rotor from the half shell increases the time and complexity of the process, as does the shrink fit process. Removal of the rotor further includes disassembly of one or more couplings, which additionally increases the complexity and time involved.
    Brief description of the invention
    The present invention relates to a torsional frequency adjusting device for a rotating body, wherein the torsional frequency adjusting device comprises a first ring and a second ring. The first ring may have a first engagement surface parallel to an outer surface of the rotating body, the first surface having a total arc length that is smaller than a circumference of the outer surface of the rotating body. The first ring may further include a first wedge surface inclined at a first angle with respect to the first surface. The second ring may have a second wedge surface corresponding to and selectively engaged with the first wedge surface, wherein a total arc length of the second wedge surface is less than the total arc length of the first wedge surface at each respective point along a common longitudinal axis of the first and the second second ring. The adjustment device may include generating means for selectively engaging the first wedge surface with the second wedge surface, thereby creating an interference fit of the first engagement surface with the outer surface of the rotating body.
    Brief description of the drawings
    These and other features of the disclosure will become more readily apparent from the following detailed description of various aspects of the invention, taken in conjunction with the accompanying drawings, which illustrate various aspects of the invention.<Tb> FIG. 1 <SEP> is a schematic cross-sectional view of an unmounted torsional frequency adjuster according to embodiments of the invention disclosed herein.<Tb> FIG. 2 <SEP> is a schematic perspective view of the unassembled torsional frequency adjuster shown in FIG. 1 according to embodiments of the invention disclosed herein.<Tb> FIG. 3 <SEP> is a schematic cross-sectional view of the torsional frequency adjusting device according to FIGS. 1 and 2 in the mounted state according to embodiments of the invention disclosed herein.<Tb> FIG. FIG. 4 shows a schematic perspective view of the assembled torsional frequency adjuster of FIG. 3 according to embodiments of the invention disclosed herein. FIG.<Tb> FIG. FIG. 5 shows a schematic cross-sectional view of an unmounted torsional frequency adjuster according to embodiments of the invention disclosed herein. FIG.<Tb> FIG. FIG. 6 shows a schematic cross-sectional view of the assembled torsional frequency adjuster of FIG. 5 according to embodiments of the invention disclosed herein. FIG.<Tb> FIG. Figure 7 shows a schematic perspective view of the torsional frequency adjuster of Figures 5 and 6 according to embodiments of the invention disclosed herein.<Tb> FIG. FIG. 8 shows a schematic cross-sectional view of a torsional frequency adjustment device according to further embodiments of the invention disclosed herein. FIG.<Tb> FIG. 9 shows a schematic cross-sectional view of a torsional frequency adjustment device according to additional embodiments of the invention disclosed herein.<Tb> FIG. Figure 10 shows a schematic cross-sectional view of a torsional frequency adjustment device according to further embodiments of the invention disclosed herein.
    It should be noted that the drawings can not be true to scale. The drawings are intended to depict only typical aspects of the invention and, thus, should not be considered as limiting the scope of the invention. In the drawings, like reference characters designate like elements among the drawings.
    The detailed description explains embodiments of the invention together with advantages and features by way of example with reference to the drawings.
    Detailed description of the invention
    Aspects of the invention provide a way to add mass to a rotating body, such as a rotor, to vary a torsional resonant frequency of the rotor or a respective rotor string without removing the rotor from its housing or half shell and without removing it coupling bolts. In broad terms, a wedge ring can be crimped onto the rotor by two or more mass or outer or pin rings, although multiple wedge rings can be used. By segmenting the wedge ring and / or the mass rings so that each contains at least two parts, an interference fit can be created by contraction of the mass rings around the wedge ring. A particularly advantageous configuration includes circumferentially staggered gaps between bolt ring segments to reduce stress on the mass rings and / or wedge rings and the assembly as a whole. When the mass rings are contracted over the wedge ring on a rotor or the like, an inwardly directed radial force is generated by the wedge effect, which presses the wedge on the rotor and thereby creates a press fit. The interference fit maintains the position of the torsional frequency adjuster on the rotor and prevents it from moving in the axial or circumferential directions, and maintains contact over overspeed conditions that would be expected, such as in overspeed balancing performed on the rotor Procedure, upright.
    [0008] Referring to FIGS. 1-4, it being noted that some elements may be visible only in the cross-sectional views of FIGS. 1 and 3, an example of a torsional frequency adjuster 100 for a rotating body 10 may include a first ring 110, which in embodiments is constructed as an inner ring or a wedge ring. The first ring 110 has a first engagement surface 111, such as a cylindrical inner surface parallel to an outer surface 12 of the rotating body 10. The first engagement surface 111 has an inner total arc length that is smaller than a circumference of the outer surface 12 of the rotating body 10. A first wedge surface 112, which is inclined at a first angle with respect to the first engagement surface 111, extends from a left or front edge 113 in the longitudinal direction of the first ring 110 towards a right or rear edge 114 in the longitudinal direction of the first ring 110. A second ring 120, which depending on a specific implementation, an outer ring, a retaining ring, a bolt ring and / or Mass ring may have an inner end 121 which includes a second wedge surface 122 corresponding to the first wedge surface 112. An inner overall arc length of the second wedge surface 122 is less than the entire arc length of the first wedge surface 112 at each respective point along a common longitudinal axis of the first and second rings 110, 120. A generator 130 may optionally include the first wedge surface 112 and the second wedge surface 122 contract, creating a press fit or wedge action that creates an inward radial force. When the adjustment device 100 is mounted on the rotating body 10, the inward radial force maintains the adjustment device 100 on the rotating body 10 in position.
    As particularly seen in FIGS. 1 and 3, the first wedge surface 112 of the first ring 110 may terminate at a center 115 in the longitudinal direction of the ring 110 and abut a third wedge surface 116 extending longitudinally from the center 115 extends to the right or rear edge 114 in the longitudinal direction of the first ring 110. The first ring 110 in embodiments has the largest outer diameter at the center 115 in the longitudinal direction, while the left and the right edge 113, 114 each have a respective outer diameter which is smaller than that of the center 115 in the longitudinal direction. While the left and right edges 113, 114 are longitudinally illustrated in Figs. 1-4 as having similar outer diameters, various outer diameters may be used as desired and / or appropriate.
    As further seen in FIGS. 1-4, particularly in FIGS. 1 and 3, the second ring 120 may be a composite ring that includes a plurality of component rings or sub-rings 124. For example, For example, one or more left or front lower rings 126 may be used, with the second wedge surface 122 including the inner surfaces of each left or front lower ring 126. In addition, one or more right or rear lower rings 128 may be used, the inner surfaces of which may form a fourth wedge surface 129 corresponding to the third wedge surface 116. While the example of Figs. 1-4 shows a single left or front sub-ring and a single right or rear sub-ring, a plurality of such sub-rings may be used as seen in Figs. 5-7. When multiple sub-rings 124 are used on each side or end of the adjustment device, the inner surfaces of the sub-rings of a given side or a given end or portion of the adjustment device may form a substantially continuous surface which may include a respective wedge surface. If e.g. multiple left or front underlays 126 are used, their combined inner surfaces may form a substantially continuous surface that may include the second wedge surface 122. Similarly, if multiple right or rear underbondings 128 are used, their combined inner surfaces can form a continuous surface that may include the fourth wedge surface 129.
    The generating means 130 may, as seen in both examples of Figs. 1-7, include attachment means adapted to the left or front sub-ring (s) 126 and the right or rear sub-ring (s) (e) 128 merge. For example, For example, although in embodiments, a plurality of circumferentially spaced bolts 132 may be inserted through the lower rings and nuts 134 may be used to retract the lower rings 124. It should be noted that other fastening means may be used as may be desired and / or suitable. When bolts 132 and nuts 134 are used as the fasteners, the lower rings are contracted as the nuts 134 are tightened, but are partially prevented from radial movement outwardly by the bolts 132, while the second and fourth wedge surfaces 122, 122 129 with the first and third wedge surface 112, 113 more and more fully engage, resulting in a wedge effect. Because the first ring 110 is prevented from rotating radially inwardly by the rotating body 10, the wedging action causes an interference fit and / or inward radial force that can maintain the adjustment device 100 in position on the rotating body 10.
    As can further be seen in FIGS. 2, 4 and 7, each of the first ring 110 and the second ring 120, including the sub-rings 124, may be segmented, resulting in assembly of the adjustment device 100 on the rotating body 10 without having to take out the rotating body from any housing or the like (not illustrated) that might otherwise hinder mounting of a conventional adjustment device. For example, For example, as shown in FIGS. 2, 4, and 7, the first ring 110 may include a plurality of first arcuate segments 140 selectively mounted to the rotating body 10, and the second ring 120 may include a plurality of second arcuate segments 150, which may be optional be mounted on the first ring 110. For each segmented ring and / or segmented sub-ring, the total arc length of the inner surfaces of segments of a ring is less than a perimeter of the surface with which the respective segmented ring is intended to engage to form an interference fit between the segmented ring and the surface to assist with. In addition, the inner surfaces of the arcuate segments may have the same radius of curvature as the surfaces with which they are intended to be engaged, although in embodiments the arcuate segments may have a smaller radius of curvature to enhance the interference fit.
    As for the first ring 110, in embodiments, the engagement surface 111 may include the combined inner surfaces of the first arcuate segments 140, and each entire arc length of the first ring 110 may comprise a total of the respective arc lengths of the first arcuate segments 140. Each first arcuate segment 140 may have a radius of curvature of its inner surface substantially equal to that of an outer surface of the rotating body 10, however, the first arcuate segments 140 may be sized such that their inner total arc length is smaller than the outer circumference of the rotating body 10. In the examples shown in FIGS. 2, 4 and 7, the first ring 110 includes two first arcuate segments which may be mounted oppositely about the rotating body 10 and leave diametrically opposite gaps 142 between the segments. While two gaps 142 are illustrated, it should be understood that the arcuate segments could be mounted to abut one another, leaving a single gap 142 at the diametrically opposite location to the point of engagement between the segments. In addition, if more than two first arcuate segments 140 are used, multiple gaps 142 may be formed.
    The second ring 120 is illustrated in Figs. 2 and 4, as it has two sub-rings 124, each having two second arcuate segments 150. Like the first ring 110, the arcuate segments of each lower ring may be mounted opposite one another and leave diametrically opposed gaps 152 between the segments (with a gap 152 hidden between the segments of the right or rear lower ring 128 in the figures). Because such gaps 152 during operation, e.g. may cause stress on the adjustment device 100, embodiments may arrange the gaps 152 of the sub-rings 124 offset from each other so as to more evenly distribute and / or reduce the stress caused by the gaps 152. If e.g. two segments are used in each sub-ring, the gaps 152 may be circumferentially spaced substantially uniformly spaced at 90 ° intervals. In addition, the gaps 142 of the first ring 110 may be taken into account so that a gap 142 or gap 152 may occupy a respective unique circumferential position, such as at intervals of 45 ° about the adjustment device 110. By using multiple sub-rings, such as by using eight sub-assemblies 124 in the second ring 120, as seen in FIGS. 5-7, the stress can be reduced and / or distributed more evenly. While eight sub-rings are illustrated in FIGS. 5-7, it should be understood that any number of sub-rings in the first ring 110 and / or the second ring 120 may be used as appropriate and / or desired.
    A modified configuration of the first or wedge ring 110 and the second ring 120 can be seen in another example of an adjustment device 100 in FIG. Here, the sub-rings 124 of the second or retaining ring 120 may engage the outer surface of the rotor 10 while the second and fourth wedge surfaces 122, 129 are substantially radially outward, and the first or tapered ring 110 may thus be mounted such that the first and third wedge surfaces 112, 116, which face generally radially inwardly, are selectively engageable with the second and fourth wedge surfaces 122, 129, respectively, of the lower rings 124. Thus, the first ring 110 may be considered to include an outer ring in this example, while the second ring 120 may be considered an inner ring. In this configuration, the generator 130 may include fasteners 132, such as bolts, as well as retaining flanges or collars 160, which may collectively retain the first ring 110 and the lower rings 124 against outward radial movement. As the generator 130 draws the sub-rings 124, a wedging action may urge the sub-rings 124 against the rotor 10. The adjustment device 100 may then be held in position by radial forces generated by the mutual engagement between the wedge surfaces 112, 116, 122, 129. While this configuration may be used in embodiments, the inclusion of through-holes in the first or tapered ring 110 for the bolts 122 may increase cost and complexity.
    Another configuration for an adjustment device 100 according to embodiments is illustrated in FIG. 9. As illustrated, the first or key ring 110 may include a single wedge surface, such as the first wedge surface 112, and the second ring 120 may include a corresponding wedge surface, such as the second wedge surface 122. Retaining rings 160 mounted on opposite sides of the first and second rings 110, 120 can retract and hold the first and second rings 110, 120 in response to the action of the fasteners 132, which are illustrated herein as bolts. While the bolts are illustrated as passing through both the first and second rings 110, 120, it should be understood that in embodiments, the bolts may pass through only the second ring 120. While the wedge surfaces are contracted, particularly when the second ring 120 is prevented from radial outward movement, for example, by the fasteners 132, the wedging action causes an inwardly directed radial force that maintains the adjustment device 100 on the rotating body 10. The retaining rings 160 and / or the bolts 132 can consequently be regarded as parts of a generation device. In addition, as seen in FIG. 10, the retaining rings 160 may be included as holding portions or flanges 160 instead of as separate elements as seen in FIG. 9.
    权利要求:
    Claims (10)
    [1]
    A torsional frequency adjuster (100) for a rotating body (10) for circumferentially mounting on an outer surface (12) of said rotating body (10), said torsional frequency adjusting device (100) comprising:a first ring (110) having a first engagement surface (111) parallel to an outer surface (12) of the rotating body (10), the first engagement surface (111) having a total arc length smaller than a circumference the outer surface (12) of the rotating body (10), the first ring (110) further having a first wedge surface (112) inclined at a first angle with respect to the first engagement surface (111);a second ring (120, 126) having a second wedge surface (122) corresponding to and selectively engaged with the first wedge surface (112), wherein a total arc length of the second wedge surface (122) is less than a full arc length the first wedge surface (112) at each respective point along a common longitudinal axis of the first and second rings (110, 120, 126); anda generating means (130) for selectively engaging the first wedge surface (112) with the second wedge surface (122), thereby effecting an interference fit of the first engagement surface (111) with the outer surface (12) of the rotating body (10).
    [2]
    The adjustment device (100) of claim 1, wherein the first ring (110) includes a plurality of arcuate segments (140) and at least one gap (142) between a respective pair of circumferentially adjacent arcuate segments (140).
    [3]
    The adjustment device (100) of claim 1, wherein the second ring (120, 126) includes a plurality of arcuate segments (150) and at least one gap (152) between a respective pair of circumferentially adjacent arcuate segments (150).
    [4]
    4. adjustment device (100) according to claim 1, wherein:the first ring (110) includes a plurality of first arcuate segments (140) and at least one first gap (142) between a respective pair of circumferentially adjacent first arcuate segments (140), andthe second ring (120, 126) includes a plurality of second arcuate segments (150) and at least one second gap (152) between a respective pair of circumferentially adjacent second arcuate segments (150) and wherein each first gap (142) extends to an arbitrary second gap (152) is circumferentially spaced.
    [5]
    The adjustment device (100) of claim 1, wherein said generating means (130) includes first and second retaining rings (160) on opposite sides of said first and second rings (110, 120) and a plurality of fastening means (132, 134) at the first and second retaining rings (160) are circumferentially spaced to selectively retract the first and second retaining rings (160), thereby selectively engaging the first and second wedge surfaces (112, 122).
    [6]
    6. adjustment device (100) according to one of claims 1 to 4, wherein the first ring (110) includes a third wedge surface (116) which is inclined with respect to the first engagement surface (111) such that an end with the largest diameter the first wedge surface (112) is adjacent at one end with the largest diameter of the third wedge surface (116).
    [7]
    The adjustment device (100) of claim 6, further including a third ring (120, 128) having a fourth wedge surface (129) corresponding to and selectively engaged with the third wedge surface (116), wherein an entire arc surface of the fourth wedge surface (129) is less than the total arc length of the third wedge surface (116) at each respective point along a common longitudinal axis of the first and third rings (110, 128).
    [8]
    8. adjustment device (100) according to claim 7, wherein the generating means (130) includes a plurality of fastening means (132, 134) which are arranged on the second and the third ring (120, 126, 128) circumferentially spaced and inserted therethrough to selectively retract the second and third rings (120, 126, 128), thereby selectively contracting the first and second wedge surfaces (112, 122) and contracting the third and fourth wedge surfaces (116, 129).
    [9]
    The adjustment device (100) of claim 7, wherein at least one of the second ring and the third ring (120, 126, 128) includes a plurality of sub-rings (124), each sub-ring (124) including a plurality of respective arcuate segments (150), wherein each sub-ring (124) includes at least one respective gap (152) between respective pairs in the circumferential direction of adjacent arcuate segments (150) and the plurality of sub-rings (124) are arranged such that their respective gaps (152) are circumferentially spaced.
    [10]
    10. Adjusting device (100) according to claim 9, wherein both the second ring (120, 126) and the third ring (120, 128) a plurality of sub-rings (124) and the column (152) of both a plurality of sub-rings (124) in Circumferentially spaced so that no two gaps (152) occupy the same circumferential position.
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    KR101973128B1|2017-09-04|2019-04-26|현대자동차주식회사|Transmission mount type of side assembling|
    法律状态:
    2017-03-15| NV| New agent|Representative=s name: GENERAL ELECTRIC TECHNOLOGY GMBH GLOBAL PATENT, CH |
    2018-10-31| PL| Patent ceased|
    优先权:
    申请号 | 申请日 | 专利标题
    PCT/PL2013/000035|WO2014142684A1|2013-03-15|2013-03-15|Torsional resonance frequency adjustor|
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