• 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 fastener bolt (58) for an adjustable vane assembly (20) is disclosed. The fastening bolt (58) essentially includes a lower segment (78), a middle segment (80), an upper segment (82) and a heel segment (84). The lower segment (78) has substantially a shape and configuration adapted for attachment to a synchronizer ring (26) of the adjustable vane assembly (20). The middle segment (80) has substantially a shape and configuration adapted to receive a pivotal attachment device (60) of the adjustable vane assembly (20). The heel segment (84) is disposed between the lower segment (78) and the middle segment (80). The upper segment (82) is substantially shaped and configured to receive a retainer (102) for rigidly attaching the rotary fastener (60) to the mounting bolt (58).
    公开号:CH703872B1
    申请号:CH01567/11
    申请日:2011-09-21
    公开日:2016-04-15
    发明作者:Mcfarland Jarrett Harry Jr；John Lammas Andrew；Christopher Howard Michael
    申请人:Gen Electric；
    IPC主号:
    专利说明:

    Field of the invention
    The present subject matter relates generally to gas turbines, and more particularly to a mounting bolt for an adjustable vane assembly of a compressor.
    Background of the invention
    Gas turbines usually include a compressor, a plurality of burners and a turbine section. The compressor pressurizes the air flowing into the turbine. The pressurized air discharged from the compressor flows into the burners. The air entering the burners is mixed with the fuel and burned. Hot combustion gases flow from each burner through a transition piece to the turbine section of the gas turbine to drive the turbine and convert energy.
    A typical compressor for a gas turbine may be configured as a multi-stage axial compressor and may include both rotating and fixed components. A shaft drives a central rotor drum or a rotor wheel which has a number of annular rotors. Rotor stages of the compressor rotate between a similar number of fixed stator stages, each rotor stage including a plurality of rotor blades secured to the rotor wheel and each stator stage including a plurality of stator vanes secured to an exterior housing of the compressor. During operation, the airflow passes through the compressor stages and is progressively compressed, with each successive downstream stage increasing the pressure until the air is discharged from the compressor outlet at a maximum pressure.
    To improve the performance of a compressor, one or more of the stator stages adjustable stator vanes may be included, which are designed for rotation about their longitudinal or radial axes. Such variable stator vanes generally allow for an improvement in compressor efficiency and performance by controlling the amount of air flowing into and through the compressor by rotating the angle at which the stator vanes are aligned with respect to the airflow. The rotation of the variable stator vanes is achieved substantially by the attachment of a lever arm to each stator vane and the connection of each individual lever to a co-movement or synchronizer ring disposed substantially concentrically with respect to the compressor housing. The synchronizer ring is in turn coupled to an actuator configured to rotate the synchronizer ring about the center axis of the compressor. As soon as the synchronizer ring is rotated by the actuator, the lever arms are rotated accordingly, thereby causing rotation of each stator vane about its radial or longitudinal axis.
    Current synchronizer ring and lever arm assemblies essentially design the lever arms to have a sliding engagement with the synchronizer ring at the rotational interface between such components. In particular, the lever arm is typically configured to slide radially and / or circumferentially at the rotational interface between the lever arm and the synchronizer ring as soon as the synchronizer ring is rotated. This sliding engagement generally produces excessive wear of the locating components disposed on this sliding interface. Furthermore, the sliding engagement used in conventional arrangements often provides insufficient support for the synchronizer ring. In particular, the lever arms arranged on the upper side of the synchronizer ring do not bear any of the synchronizer ring weight due to the relative sliding mobility given between the lever arms and the synchronizer ring during the rotation of the synchronizer ring. Consequently, arranged around the underside of the synchronizer ring lever arms must support the full weight of the synchronizer ring. Such uneven support can even lead to even more wear of the arranged at the mounting interfaces between the lever arms and the synchronizer ring components. Further, insufficient support can also result in excessive wear on the sliders circumferentially spaced around the compressor housing because the sliders must be used to support part of the synchronizer ring weight.
    The object underlying the present invention is to provide a mounting bolt for an adjustable vane assembly, which provides for a reduction of wear in the assembly. This object is solved by the subject matter of the independent claim. Advantageous developments of the present invention are the subject of the dependent claims.
    Brief description of the invention
    Advantages of the invention will be set forth in part in the description which follows, or may be obvious from the description, or may be learned by practice of the invention.
    The present invention relates to a mounting bolt for an adjustable vane assembly. The fastening bolt has a lower segment, a middle segment, an upper segment and a shoulder segment. The lower segment has a shape and configuration adapted for attachment to a synchronizer ring of the variable vane assembly. The middle segment has a shape and configuration adapted for receiving a pivotal attachment of the adjustable vane assembly. The paragraph segment is arranged between the lower segment and the middle segment. The upper segment has a shape and configuration adapted to receive a retainer adapted to firmly attach a bearing of the rotary fastener to the fastening bolt.
    These and other features of the present invention will become better understood by reference to the following description and appended claims. The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.
    Brief description of the drawings
    A complete and basic description of the present invention, including its best mode, which will be apparent to those skilled in the art, is set forth hereinafter in the specification, which refers to the accompanying drawings, in which:<Tb> FIG. 1 <SEP> provides a schematic representation of a gas turbine;<Tb> FIG. Figure 2 provides a cross-sectional view of an embodiment of an adjustable vane assembly according to aspects of the present invention, particularly illustrating the variable vane assembly associated with one of a plurality of variable stator vanes of a compressor;<Tb> FIG. Figure 3 provides an enlarged view of a portion of the embodiment of the variable vane assembly shown in Figure 2, particularly illustrating the attachment of the lever arm to the synchronizer ring; and<Tb> FIG. Figure 4 <SEP> provides a partial perspective view of one embodiment of the variable vane assembly, particularly illustrating the synchronizer ring and an actuator coupled to the actuator ring.
    Detailed description of the invention
    [0011] Reference will now be made in detail to embodiments of the invention, one or more examples of which are illustrated in the drawings. Each example is given in the context of an explanation of the invention and not to a limitation of the invention.
    1 shows a schematic representation of a gas turbine 10. The gas turbine 10 includes a compressor 12, a plurality of burners 14 and a turbine section 16. The compressor 12 and the turbine section 16 may be substantially coupled by a shaft 18. The shaft 18 may be just one shaft or consist of a plurality of shaft segments which are coupled together to form the shaft 18. In one embodiment, the compressor 12 may consist of a multi-stage axial compressor with multiple corresponding rotor and stator stages. In such an embodiment, one or more of the stator stages may include a plurality of adjustable stator vanes. For example, the compressor 12 may include a plurality of fixed stator vanes in its downstream stages while the variable vanes are disposed in its upstream stages. Alternatively, all stator stages of a compressor 12 may include adjustable stator vanes.
    During operation of the gas turbine 10, the compressor 12 delivers compressed air to the burners 14. Air and fuel are mixed and burned in each burner 14, and hot combustion gases flow in a hot gas path from the burners 14 to the turbine section 16, in which the combustion gases are deprived of energy for generating work.
    FIGS. 2-4 show various views of embodiments of an adjustable vane assembly 20 for actuating a plurality of adjustable stator vanes 22 in accordance with aspects of the present subject matter. In particular, FIG. 2 illustrates a cross-sectional view of one embodiment of the described adjustable vane assembly 20 coupled to one of the stator vanes 22. FIG. 3 is an enlarged view of a portion of the adjustable vane assembly 20 illustrated in FIG. 2, particularly illustrating the attachment of the lever arm 24 to the synchronizer ring 26. FIG. In addition, FIG. 4 illustrates a partial perspective view of one embodiment of the variable vane assembly 20 described, particularly illustrating the synchronizer ring 26 and an actuator 28 coupled to the synchronizer ring 26.
    As shown particularly in FIG. 2, the compressor 12 of a gas turbine engine 10 may include one or more stages having a plurality of adjustable stator vanes 22 (only one of which is shown) rotatably mounted in an outer compressor housing 30. Each stator vane 22 essentially includes an airfoil segment 32 having a first or pressure side 34 and a second or suction side opposing the circumferential direction (not shown) defining the aerodynamic surface of the vane 22 over which the air 36 flows during operation of the compressor 12. The pressure and suction sides substantially extend along a chord 38 between opposing leading and trailing edges 40, 42 and extend radially from a radially inner point 44 to a radially outer foot 46. Each stator vane 22 also includes an integral shaft segment 48 which extends coaxially and radially from the airfoil segment 32 outwardly and through a defined in the housing complementary cylindrical opening 50 extends. The shaft segment 48 may be substantially fixed in the opening 50 for rotation therein. For example, a bushing 52 may be disposed at the interface of the housing and shaft segment 48 to allow rotation of the stator vane 22 with respect to the housing 30.
    Each stator vane 22 of the compressor 12 may be substantially configured to flow the air 36 flowing through the compressor 12 to a corresponding row or stage of rotor blades 54 extending radially outwardly from a supporting rotor disk or wheel 56 extend. In particular, the air routed through each stage of the stator vanes 22 and rotor blades 54 may be sequentially compressed in the compressor 12 for delivery to the burners 14 of the gas turbine engine 10. As is well known, by altering the angle at which the stator vanes 22 are aligned with respect to the airflow 36, that is, by rotating the stator vanes 22 about the stem segment 48, the compressor efficiency and performance can be improved by moving in and out of the compressor 12 flowing air amount 36 is controlled. To facilitate such rotation of the stator vanes 22, an adjustable vane assembly 20 may be used as described in detail below.
    Referring to FIGS. 2-4, the adjustable vane assembly 20 includes, in addition to the present subject matter, a synchronizer ring 26 that is configured to actuate a plurality of outwardly extending lever arms 24 disposed on each stator vane 22 of a particular stator stage of a compressor 12 mounted and rigidly attached. The synchronizer ring 26 is substantially coupled to the lever arms 24 via a plurality of fastening bolts 58 according to the invention, which are fastened along the circumference of the synchronizer ring 26. Additionally, the adjustable vane assembly 20 may also include a plurality of pivotal fasteners 60 disposed between the lever arms 24 and the mounting bolts 58 so as to define a rotational interface about which the lever arms 24 rotate with respect to the mounting bolts 58 and / or the synchronizer ring 26 can. Further, as more particularly shown in FIG. 4, the synchronizer ring 26 may be coupled to one or more suitable actuators 28 configured to rotate the synchronizer ring 26 about a center axis 62 of the compressor 12. For example, the synchronizer ring 26 may be connected to the actuator (s) 28 by any suitable means (eg, a pushrod 64) such that the actuator (s) 28 rotate the synchronizer ring 26 clockwise or counterclockwise about the center axis 62 , As a result, while the synchronizer ring 26 is being rotated by the actuator (s) 28, the lever arms 24 can accordingly rotate about the mounting bolts 58. The rotating lever arms 24, in turn, cause the stator vanes 22 to rotate, thereby changing the angle at which the vanes 22 are aligned with respect to the airflow 36 in the compressor 12.
    Essentially, the synchronizer ring 26 of the adjustable vane assembly 20 may have a round or annular structure that is radially outwardly of and substantially concentric with the compressor housing 30. In some embodiments, the synchronizer ring 26 may be configured as a one-piece or multiple-piece construction, and may be made of any suitable material, such as aluminum. stainless steel or other material that can withstand the stresses typically applied to a synchronizer ring. In addition, the synchronizer ring 26 may have substantially any suitable cross-section, such as e.g. a rectangular, elliptical or round cross section, have. As particularly shown in FIGS. 2 and 3, in one embodiment, the synchronizer ring 26 may define a substantially "C-shaped" cross-section. Thus, the synchronizer ring 26 can be relatively easily designed without compromising its structural integrity.
    In particular, as shown in FIG. 2, each lever arm 24 of the adjustable vane assembly 20 may include a first end 66 rigidly secured to the shaft segment 48 of an adjustable stator vane 22 and a second end 68 rotatably connected to the synchronizer ring 26 by a mounting bolt 58 is engaged and firmly attached thereto. In essence, the first end 66 of each lever arm 24 may be secured to the stator vane 22 using any suitable means. For example, the stator vane 22 may include a wedge seat 70 (e.g., a "D-shaped" seat) extending radially outward from the shaft segment 48 and a threaded shank 72 extending radially from the wedge seat 70. The wedge seat 70 may be configured substantially as a self-aligning feature for securing the lever arm 24 over the stator vane 22. For example, the first end 66 of the lever arm 24 may define a mounting hole that conforms to the shape of the wedge seat 70 (e.g., a D-shaped mounting hole) so as to allow attachment of the lever arm 24 to the stator vane 22 for rotation therewith. The lever arm 24 may then be attached to the stator vane 22 by attaching a nut 74, such as a nut. a fastening nut, or a self-retaining nut on the threaded shaft 72 are attached.
    It will also be apparent to those skilled in the art that various other embodiments may be used within the scope of the present invention to mount and / or rigidly secure the first end 66 of the lever arm 24 to the stem segment 48 of the stator vane 22. For example, in various embodiments, wedging surfaces, toothed surfaces in mating correspondence, or other suitable means for attaching or otherwise engaging the lever arm 24 with the stator vane 22 may be used. Similarly, in various embodiments, the lever arm 24 may be secured to the stator vane 22 using a retaining pin or latch by welding the components together or using any other suitable fastening and / or securing means.
    3, the second end 68 of each lever arm 24 is designed substantially for a rotatable connection with a synchronizer ring 26 via a fastening bolt 58. In particular, a rotary fastener 60 is disposed between each lever arm 24 and its corresponding mounting bolt 58 so as to define a rotational interface 76 therebetween. As a result, rotation of the lever arm 24 with respect to the synchronizer ring 26 and / or the mounting bolt 58 at such interface 76 is permitted. Further, each mounting bolt 58 may also be configured for rigid attachment to a portion of the rotary fastener 60 such that there is no relative movement or movement relative to the synchronizer ring 26 and the rotary interface 76 about which the lever arm 24 rotates. Thus, it may be prevented or substantially prevented that the lever arm 24 slides radially, circumferentially or in any other direction than predetermined by the rotational interface 76 with respect to the synchronizer ring 26 and / or the mounting bolt 58 during rotation of the synchronizer ring 26.
    According to the present invention, in order to facilitate such otherwise rotatable, otherwise fixed connection of the various components of the adjustable vane assembly 20, each bolt 58 essentially comprises a plurality of segments, in particular a lower segment 78, a middle segment 80, an upper segment 82 and a heel segment 84 disposed between the lower segment 78 and the middle segment 80. As shown in FIG. 3, each of the segments 78, 80, 82, 84 may be disposed substantially coaxially with a center axis 86 of the fastening bolt 58. In addition, each of the segments 78, 80, 82, 84 may be substantially cylindrically shaped. However, it should be appreciated that in other embodiments, each segment 78, 80, 82, 84 may have substantially any suitable shape that allows the segment 78, 80, 82, 84 to function as described herein. Further, in a particular embodiment of the present invention, each of the segments 78, 80, 82, 84 may be separated by a groove 88. Such grooves 88 may be provided substantially on the mounting bolt 58 to serve the stress relief. In addition, the grooves 88 may be provided to enhance the attachment of the segments 78, 80, 82, 84 to the various other components of the variable vane assembly 20. In particular, the grooves 88 may allow the surfaces and / or sides of the segments 78, 80, 82, 84 to be positioned substantially flush with each other with respect to the surfaces of the other components.
    Furthermore, as shown in FIG. 3, the lower segment 78 of the mounting bolt 58 is designed essentially for attachment to a portion of the synchronizer ring 26. For example, in the illustrated embodiment, the lower segment 78 is attached to a lower extension 90 of the substantially "C-shaped" synchronizer ring 26 such that the attachment bolt 58 extends substantially radially outwardly therefrom. It will be appreciated that in alternative embodiments, the lower segment 78 may be attached to the synchronizer ring 26 at any other suitable location. For example, in another embodiment, the lower segment 78 may be attached to an upper extension 29 of the synchronizer ring 26 such that the attachment bolt 58 extends radially outwardly or radially inwardly therefrom. Further, in embodiments in which the synchronizer ring 26 does not define a substantially "C-shaped" cross-section, the lower segment 78 may be attached to any suitable portion of the synchronizer ring 26 that facilitates operation of the adjustable vane assembly 20 as described herein.
    Additionally, it will be appreciated that the lower segment 78 of the mounting bolt 58 may be substantially secured to the synchronizer ring 26 using any suitable fastening method known in the art. For example, as shown in FIG. 3, the lower segment 78 may be threaded such that it can be secured in a corresponding threaded hole 94 defined in the synchronizer ring 26. In another embodiment, the lower segment 78 may be configured for a press fit or an adhesive bond with a corresponding wellbore (not shown) defined in the synchronizer ring 26.
    Furthermore, according to FIG. 3, in one embodiment, the middle segment 80 of the fastening bolt 58 can essentially serve as the rotary fastening point between the lever arm 24 and the synchronizer ring 26. Thus, the center segment 80 may be configured to receive any rotary fastener 60 known in the art for rotationally engaging the lever arm 24 with the synchronizer ring 26 by means of the mounting bolt 58. For example, in the illustrated embodiment, the rotary fastener 60 has a bearing 61 mounted on or about the middle segment 80, or otherwise disposed, so as to define a rotational interface 76 between the lever arm 24 and the mounting bolt 58. Thus, it should be appreciated that the center segment 80 has substantially a shape and design adapted to receive the bearing 61. For example, in one embodiment, the center segment 80 may have a smooth cylindrical surface such that the bearing 61 can be mounted thereon. In addition, the middle segment 80 may be sized to provide a controlled tight fit between the bearing 61 and the mounting bolt 58. For example, the clearance provided between the bearing 61 and the mid-segment 80 may be less than about 1 mm clearance on a diameter, e.g. less than about 0.5mm of clearance on a diameter or less than 0.1mm clearance on a diameter. In a particular embodiment of the present invention, the clearance may be from about 0.01 mm play on a diameter to about 0.07 mm play on a diameter, such as a. from about 0.03 mm play on a diameter to about 0.05 mm play on a diameter and all other subranges are in between. However, it should be appreciated that in alternative embodiments, the intended clearance may be greater than 1mm clearance on a diameter.
    In essence, any bearing known in the art can be used to provide rotational engagement between the lever arm 24 and the mounting bolt 58. As shown in FIG. 3, in one embodiment, the bearing 61 may include a spherical plain bearing having an inner ball 96 secured to the middle segment 80 of the mounting bolt 58 and an outer bore secured within a corresponding bore hole 100 defined in the second end 68 of the lever arm 24 Ring bore 98 have. The outer ring bore 98 may have substantially an inner concave spherical surface corresponding to the outer convex spherical surface of the inner ball 96 to allow rotation of the outer annular bore 98 in one or more orthogonal directions with respect to the inner ball 96. Thus, when the synchronizer ring 26 is rotated by the actuator (s) 28, each lever 24 can rotate and / or rotate about the rotational interface 76 defined between the inner ball 96 and the outer annular bore 98 of the bearing 61.
    It will be readily apparent to those skilled in the art that various other suitable pivotal mounting devices 60 can be used within the scope of the present invention to engage the lever arms 24 with the synchronizer ring 26 by means of the mounting bolts 58 and thus provide a rotational interface 76 by which the lever arms 24 can rotate with respect to the synchronizer ring 26 and / or the mounting bolts 58. For example, in alternative embodiments, the rotary fastener 60 may include a portion of a suitable pivot such as a pivot. a socket joint, an ellipsoid joint, a hinge joint or the like, which is adapted to connect to the corresponding device which is defined in the fastening bolt 58 or otherwise contained. In another embodiment, the mounting bolt 58 itself may serve as the pivotal attachment 60 of the variable vane assembly 20. For example, the lever arm 24 or a component mounted on the lever arm 24 may be configured to rotate directly about the mounting bolt 58 (e.g., the middle segment 80) such that the outer surface of the mounting bolt 58 substantially defines the rotary interface 76.
    Further, according to FIG. 3, as indicated above, the second end 68 of the lever arm 24 is designed so that it is coupled via the fastening bolt 58 with the synchronizer ring 28 such that no relative movement or substantially no relative movement between the synchronizer ring 26th and the rotation interface 76 is present, around which the lever arm 24 rotates. Thus, in one embodiment, the upper segment 82 of the mounting bolt 58 may be substantially adapted to receive a retainer 102 that is configured to allow a rigid attachment of the rotary fastener 60 to the mounting bolt 58. For example, as shown in FIG. 3, the inner ball 96 of the bearing 61, which defines the rotational interface 76 between the lever arms 24 and the mounting bolt 58, may be rigidly secured to the mounting bolt 58 such that the inner ball 96 moves with respect to on the synchronizer ring 26 during the rotation of the synchronizer ring 26 does not slide or otherwise moves. In particular, the upper segment 82 of the mounting bolt 58 may be threaded so as to allow for fixed attachment of a threaded retainer 102 (e.g., a self-retaining nut or mounting nut) over the inner ball 96 of the bearing 81. Additionally, as illustrated, the heel segment 84 of the mounting bolt 58 may extend substantially outwardly from the center axis 86 of the mounting bolt 58 farther than the middle segment 80, such that the inner ball 96 may be positioned or otherwise positioned opposite a radially outer surface 104 of the heel segment 84 can be arranged. Thus, when the retainer 102 is mounted over the bearing 61, the inner ball 96 between the retainer 102 and the outer surface 104 of the heel segment 84 can be squeezed, pushed, or otherwise rigidly secured to accommodate any relative movement between the synchronizer ring 26 and the rotational interface 76 prevent which the lever arm 24 rotates. Further, it will be appreciated that the grooves 88 defined in the mounting bolt 58 may be configured to enhance the rigid attachment of the inner ball 96 to the mounting bolt 58. For example, the groove 88 defined between the heel segment 84 and the middle segment 80 may be configured to allow flush positioning of the inner ball 96 with respect to the outer surface 104 of the heel segment 84. Likewise, the groove 88 defined between the upper segment 82 and the middle segment 80 may be configured to permit occlusion or otherwise complete placement of the threads of the upper segment 82 in the retainer 102.
    It will also be appreciated that various other holding devices, such as e.g. Locking catches, pawls or any other suitable locking mechanism can be used to rigidly secure the inner ball 96 of the hinge bearing 61 to the mounting bolt 58. Likewise, any suitable securing / attachment, welding, adhesive bonding, and the like can be used to rigidly secure the inner ball 96 to the mounting bolt 58. For example, in particular embodiments of the present invention, a portion of the mounting bolt 58 (e.g., center segment 80) may be configured such that the inner ball 96 may be pressed onto the mounting bolt 58 to create a rigid attachment therebetween. In addition, in embodiments in which the rotational engagement between the mounting bolts 58 and the lever arms 24 is provided by something other than bearings, it will be appreciated that similar retainers 102 and / or fasteners may be used to provide relative movement between the synchronizer ring 25 and the rotational interface 76, around which the lever arms 24 rotate to prevent.
    By rigidly coupling the synchronizer ring 26 to the lever arms 24 via the inventive fastening bolts 58, numerous advantages for the adjustable vane assembly 20 can be provided. For example, due to the rigid attachment to the rotational interface 76, circumferential and radial sliding motions that may otherwise occur between the lever arms 24 and the synchronizer ring 26 may be prevented or at least reduced to a minimum. Thus, any wear on the mounting bolts 58, bearings 61, lever arms 24 and / or the synchronizer ring 26 can be significantly reduced and / or prevented. Further, the rigid coupling of each lever arm 24 with the synchronizer ring 26 ensures that all of the lever arms 24 rigidly support the weight of the synchronizer ring 26 about its entire circumference. As a result, the centering or roundness of the synchronizer ring 26 can be maintained. In addition, the support further added to the synchronizer ring 26 can also reduce the amount of wear that occurs on sliders (not shown), if any, between the synchronizer ring 26 and the compressor housing 30, since it would not be necessary for the sliders to significantly Support proportion of ring weight. Further, the rigid connection may also reduce the stress on the centering of the synchronizer ring 26 on the compressor housing 30 during adjustment and calibration of the variable vane assembly 20.
    Further, as shown in FIG. 3, the heel segment 84 of the fastening bolt 58 may be substantially configured so that when the lever arm 24 is rotatably secured to the mounting bolt 58, there is a gap 106 between the lever arm 24 and an adjacent surface 108 of the synchronizer ring 26 exists. In essence, the gap 106 may be configured to accommodate any rotation of the lever arms 24 that may occur with respect to the mounting bolts 58 and / or the synchronizer ring 26. For example, when the lever arm 24 is rotatably engaged with the synchronizer ring 26 using a hinge bearing 61 mounted on the mounting bolt 58, the bearing 61 can both rotate the lever arm 24 about the center axis 86 of the mounting bolt 58 and rotate along its longitudinal axis in a clockwise or counterclockwise direction. As a result, the shoulder 84 may be substantially configured to create a gap 106 that permits rotation of the lever arm 24 about the rotation interface 76 without touching or rubbing the adjacent surface 108 of the synchronizer ring 26.
    Further, in a particular embodiment of the present invention, the heel segment 84 may be adapted for attachment to the synchronizer ring 26 to provide additional means for attaching the mounting stud 58 to the synchronizer ring 26. For example, as shown in FIG. 3, the heel segment 84 may be welded to an adjacent surface 108 of the synchronizer ring 26 about at least a portion of the heel segment periphery. In such an embodiment, the heel segment 84 may be designed to have a triangular, rectangular, pentagonal, hexagonal or similar shape so as to provide at least one planar edge for providing a suitable surface for welding the heel segment 84 to the synchronizer ring 26. Further, when an undercut groove 88 is defined between the lower segment 78 and the heel segment 84, the heel segment 84 may be positioned directly on and substantially flush with the adjacent surface 108 of the synchronizer ring 26. Thus, an improved weld attachment between the heel segment 84 and the synchronizer ring 26 can be provided.
    Referring again to Fig. 2, the lever arms 24 of the adjustable vane assembly 20 may be cantilevered. Thus, the synchronizer ring 26 may be suspended above the compressor housing 30. It will be appreciated that the distance 110 in which the synchronizer ring 26 is suspended above the compressor housing may vary substantially depending on the design of the compressor 12 and / or the design of the variable nozzle vane assembly 20. In essence, however, the distance 110 may be selected so that the suspended synchronizer ring 26 does not rub or otherwise contact the compressor housing 30 while the synchronizer ring 26 is rotated. In addition, in one embodiment, one or more sliders (not shown) may be provided along the outer periphery of the compressor housing 30 to provide surface (s) on which the suspended synchronizer ring 26 may slide as required during rotation of the synchronizer ring 26. In such an embodiment, as shown in FIG. 3, the mounting bolt 58 may be configured so that the lower segment 78, when secured to the synchronizer ring 26, is recessed with respect to the radially inner surface 112 of the synchronizer ring 26. As a result, engagement of the mounting bolt 58 with any of the sliders and / or the compressor housing 30 during rotation of the synchronizer ring 26 can be prevented.
    Additionally, in various embodiments of the present subject matter, the lever arms 24 may be designed to be flexible. In particular, the lever arms 24 may be configured to deform or flex radially inwardly and / or radially outwardly while assisting the synchronizer ring 26. Thus, the diameter of the synchronizer ring 26 and / or the height of the stem segment 48 of the stator vane 22 can be chosen so that the attachment point of the lever arm 24 is disposed on the mounting bolt 58 radially farther outside than the attachment point of the lever arm 24 on the shaft segment 48. Thus, as shown in FIG. 2, the lever arm may be deformed or bent radially outward over a distance 114 between its first and second ends 66,68. Thus, the outward deflection or deformation ensures that the lever arms 24 are tensioned radially inward. As a result, when the synchronizer ring 26 is actuated and the lever arms 24 change orientation during rotation, the lever arms 24 can continuously apply an inward tension on the synchronizer ring 26 to assist its weight. This inward tension of the lever arms 24 may also provide a self-centering effect of the synchronizer ring 26, thereby enabling more efficient adjustment and calibration of the variable vane assembly 20. Further, as illustrated in FIG. 2, the lever arms may also define a substantially tapered profile 116 along a portion of its length between the first and second ends 66,68. Such tapered profiles 116 may substantially prevent the occurrence of voltage increases within the lever arms 24 as the arms 24 rotate in response to actuation of the synchronizer ring 26.
    It should be appreciated that although the variable nozzle vane assembly 20 has been described with reference to variable stator vanes 22 of the present invention, the assembly may also be used to include a stage of variable inlet guide vanes of a compressor 12 or a stage of adjustable turbine blades or Guide vanes of a turbine section 16 of a gas turbine 10 to operate. Furthermore, it will be readily appreciated that the disclosed variable vane assembly 20 may be applied to an industrial gas turbine, or for use with any other turbomachine known in the art, such as those disclosed in the art. which can be adapted in drive applications.
    A fastener bolt 58 for an adjustable vane assembly 20 is disclosed. The mounting bolt 58 generally includes a lower segment 78, a middle segment 80, an upper segment 82, and a heel segment 84. The lower segment 78 is generally shaped and configured to mate with a synchronizer ring 26 of the adjustable vane assembly 20. The middle segment 80 is substantially of a shape and configuration adapted to receive a rotary fastener 60 of the adjustable vane assembly 20. The heel segment 84 is disposed between the lower segment 78 and the middle segment 80. The upper segment 82 has substantially a shape and configuration adapted to receive a retainer 102 for rigidly attaching a bearing of the rotary fastener 60 to the mounting bolt 58.
    LIST OF REFERENCE NUMBERS
    [0037]<Tb> 10 <September> Gas Turbine<Tb> 12 <September> compressor<Tb> 14 <September> burner<Tb> 16 <September> turbine section<Tb> 18 <September> wave<tb> 20 <SEP> adjustable vane assembly<tb> 22 <SEP> adjustable vanes<Tb> 24 <September> arm<Tb> 26 <September> synchronizer ring<Tb> 28 <September> actuator<Tb> 30 <September> compressor housing<Tb> 32 <September> blade segment<tb> 34 <SEP> first or print page<Tb> 36 <September> Air<Tb> 38 <September> tendon<Tb> 40 <September> leading edge<Tb> 42 <September> trailing edge<tb> 44 <SEP> inner peak<tb> 46 <SEP> outside foot<tb> 48 <SEP> integrated shaft segment<tb> 50 <SEP> cylindrical opening<Tb> 52 <September> Bush<Tb> 54 <September> blades<tb> 56 <SEP> Rotor disc or wheel<Tb> 58 <September> mounting bolts<Tb> 60 <September> swivel device'Tb> 61 <September> Bearings<Tb> 62 <September> center axis<Tb> 64 <September> thrust rod<tb> 66 <SEP> first end (of the lever arm 24)<tb> 68 <SEP> second end (of the lever arm 24)<Tb> 70 <September> key seat<Tb> 72 <September> threaded shaft<Tb> 74 <September> nut<Tb> 76 <September> rotary interface<tb> 78 <SEP> lower segment<Tb> 80 <September> middle segment<tb> 82 <SEP> upper segment<Tb> 84 <September> sales segment<Tb> 86 <September> center axis<Tb> 88 <September> grooves<tb> 90 <SEP> lower extension<tb> 92 <SEP> upper extension<Tb> 94 <September> threaded hole<tb> 96 <SEP> inner ball<tb> 98 <SEP> outer bore ring<Tb> 100 <September> bore hole<Tb> 102 <September> holder<tb> 104 <SEP> radially outer surface<Tb> 106 <September> gap<tb> 108 <SEP> adjacent surface<Tb> 110 <September> distance<tb> 112 <SEP> radially inner surface<Tb> 114 <September> distance<tb> 116 <taper> tapered profile
    权利要求:
    Claims (14)
    [1]
    An adjustable vane assembly mounting bolt (58), wherein the adjustable vane assembly (20) includes a synchronizer ring (26) coupled to a plurality of lever arms (24) and the adjustable vane assembly (20) further comprises a plurality of pivotal fasteners (60) each of which is adapted to couple one of the plurality of lever arms (24) to the synchronizer ring (26), the fastening bolt comprising:A lower segment (78) of a shape and configuration adapted for attachment to the synchronizer ring (26);A middle segment (80) having a shape and configuration adapted to receive a pivotal fastening device (60);- A paragraph segment (84) which is arranged between the lower segment (78) and the middle segment (80); andAn upper segment (82) of a shape and configuration adapted to receive a retaining device (102) adapted to firmly connect the pivotal fastening device (60) to the fastening bolt (58).
    [2]
    The fastening bolt (58) of claim 1, wherein the lower segment (78), the middle segment (80), the heel segment (84) and the upper segment (82) are coaxial with a center axis (86) of the fastening bolt (58) ,
    [3]
    The fastening bolt (58) of claim 1, wherein the lower segment (78) is threaded and adapted for mounting in a corresponding threaded hole (94) formed in the synchronizer ring (26).
    [4]
    The fastening bolt (58) of claim 1, wherein the lower segment (78) is adapted to be recessed when installed relative to a radially inner surface (112) of the synchronizer ring (26).
    [5]
    5. fastening bolt (58) according to claim 1, wherein the shoulder segment (84) is designed so that in the assembled state, a gap (106) between the synchronizer ring (26) and the respective lever arm (24) is defined.
    [6]
    6. fastening bolt (58) according to claim 5, wherein the gap (106) allows a rotation of the respective lever arm (24) along its longitudinal axis without contact of the synchronizer ring (26).
    [7]
    The fastening bolt (58) of claim 1, wherein the shoulder segment (84) is adapted for attachment to a surface (108) of the synchronizer ring (26).
    [8]
    8. fastening bolt (58) according to claim 7, wherein the shoulder segment (84) for a weld with the synchronizer ring (26) is designed, wherein the shoulder segment at least one flat edge region for welding the shoulder segment (84) with the surface (108) of the synchronizer ring (26).
    [9]
    The fastening bolt (58) of claim 1, wherein the upper segment (82) is threaded to facilitate attachment of a threaded retainer (102) thereto.
    [10]
    The fastening bolt (58) according to claim 9, wherein said pivotal mounting device (60) includes a bearing (61) having an inner component (96) and an outer component (98) adapted for rotation with respect to said inner component (96). is designed, wherein the central segment (80) has a bearing surface which is adapted to allow the mounting of the bearing (61) thereon.
    [11]
    The fastening bolt (58) according to claim 10, wherein the heel segment (84) extends radially further from a center axis (86) of the fastening bolt (58) than the central segment (80) such that when assembled the inner component (96) of the Bearing (61) with a surface (104) of the shoulder segment (84) in abutment, when the threaded holding device (102) is attached to the upper segment.
    [12]
    The fastening bolt (58) of claim 1, further comprising a first groove (88) and a second groove (88), the first groove (88) in the fastening bolt (58) between the upper segment (82) and the middle segment (80) is defined and adapted to allow attachment of the retainer (102) to the rotary fastener (60) while the second groove (88) in the fastening bolt (58) is between the middle segment (80) and the heel segment (84). is arranged and adapted to allow the positioning of the rotary fastening device (60) relative to a surface (104) of the shoulder segment (84).
    [13]
    13. fastening bolt (58) according to claim 1, whereinthe lower segment (78), the middle segment (80), the heel segment (84) and the upper segment (82) are arranged coaxially with a center axis (86) of the fastening bolt (58);the lower segment (78) is threaded and adapted for attachment to a corresponding threaded hole (94) formed in the synchronizer ring (26);the heel segment (84) is adapted for attachment to a surface (108) of the synchronizer ring (26); the upper segment (82) is threaded to facilitate attachment of a threaded retainer (102) thereto; andthe middle segment (80) has an abutment surface adapted to allow the mounting of a bearing (61) of the rotary fastening device (60) thereon.
    [14]
    The fastening bolt (58) according to claim 13, wherein the bearing (61) comprises an inner component (96) and an outer component (98) adapted to rotate with respect to the inner component (96) Paragraph segment (84) from a center axis (86) of the fastening bolt (58) extends radially further than the. Middle segment (80) such that in the assembled state, the inner component (96) of the bearing (61) with a surface (104) of the shoulder segment (84) is in abutment when the threaded retainer (102) is attached to the upper segment (82).
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    同族专利:
    公开号 | 公开日
    JP2012072764A|2012-04-12|
    US8668444B2|2014-03-11|
    DE102011053764A1|2012-03-29|
    US20120076658A1|2012-03-29|
    JP5856786B2|2016-02-10|
    CN102418731A|2012-04-18|
    CH703872A2|2012-03-30|
    CN102418731B|2015-08-26|
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    法律状态:
    2017-03-15| NV| New agent|Representative=s name: GENERAL ELECTRIC TECHNOLOGY GMBH GLOBAL PATENT, CH |
    2021-04-30| PL| Patent ceased|
    优先权:
    申请号 | 申请日 | 专利标题
    US12/892,301|US8668444B2|2010-09-28|2010-09-28|Attachment stud for a variable vane assembly of a turbine compressor|
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