• 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:
    There is provided a system for deploying a wave spring (426) which includes a compression plate (310) having at least one groove and wherein the compression plate (310) has a ramped portion at one end thereof. A driver plate (320) has at least one guide rail (322) adapted for seating within the at least one groove. An impact tool is configured to engage the driver plate (320) and apply a drive force to the driver plate (320). The compression plate (310) is adapted to at least partially retain the wave spring (426) and the ramped portion is adapted to exert a compressive force on the wave spring (426) while the impact tool and drive plate (320) override the wave spring (426) drive the ramp-shaped section.
    公开号:CH707019B1
    申请号:CH01628/13
    申请日:2013-09-24
    公开日:2017-07-14
    发明作者:Wajahat Ali Syed；Matthew Lape Brock；Michael Braun Lawrence
    申请人:Gen Electric；
    IPC主号:
    专利说明:

    description
    Background of the Invention The invention relates generally to electrical machines, and more particularly to a system and method for deploying wave springs in electrical machines.
    In general, an electric machine, such as e.g. a power generator or motor, routinely monitored for proper maintenance and high efficiency during operation. One of the few aspects of monitoring the condition of the electric machine is the inspection of the stator bar windings to ensure that the windings do not move during operation of the electric machines. Typically, an electric machine includes a wedge system to effect a radial holding force on a stator to permit a reduction in movement of the stator bar windings in a stator slot. Such a wedge system may include wave springs (e.g., top and side wave springs) embedded in the stator winding assembly. The wave springs are generally in a compression state to keep the windings from moving. However, when the wedge system becomes loose, the amount of holding force is reduced such that the stator bar windings can move during operation. Over time, the relative movement of the stator bar windings will damage the insulation surrounding the stator bars, and a potential stator bar winding failure may occur. This can lead to electrical shorts and grounding and thereby reduce the efficiency of the machine and also reduce the time between down times of the electrical machines. As a result, monitoring of the state of the electric machine is periodically performed to determine if any stator bar winding motion in the stator slots exceeds predetermined tolerances.
    If the wedge system (including the wave springs) needs to be replaced, then a technician must manually remove the wedge system and install a new one. To reduce downtime during maintenance, it may be desirable to leave the engine on site. When the engine is left on-site, wave springs can be extremely difficult to install, especially side-wave springs, because the resulting gaps will only leave insufficient room for the technician's work and the desired job. Typically, a technician would use a hammer to drive the wave spring into place. The distance between the rotor and the stator may only be 30.5 to 61 cm (12 to 24 inches), and this space is too limited for the technician to effectively deploy the hammer and drive the wave spring to the correct position.
    Therefore, to replace the wedge system while the engine is left in place, there is a continuing need for a more efficient system and method that allows a technician to replace wave springs.
    Brief Description of the Invention According to one aspect of the invention, a system for inserting a wave spring into a slot of an electric machine includes a compression plate having at least one groove, and wherein the compression plate has a ramped portion at one end thereof. A driver plate has at least one guide rail adapted for seating within the at least one groove. An impact tool is adapted to engage the driver plate and apply a drive force to the driver plate. The compression plate is adapted to at least partially retain the wave spring and the ramped portion is adapted to exert a compressive force on the wave spring while the impact tool and the driver plate drive the wave spring over the ramped portion so as to insert the wave spring into the slot of the electric machine to drive.
    The wave spring may be a side wave spring.
    The at least one groove may consist of at least one dovetail groove. Optionally, the compression plate may include two dovetailed grooves.
    The compression plate of each system mentioned above may further comprise: two side rails adapted to support the compression plate in a slot of an electrical machine, and the two side rails adapted to allow alignment of the wave spring.
    In any of the aforementioned systems, the at least one guide rail may consist of at least one dovetailed rail.
    The drive plate of each system mentioned above may include two dovetailed rails.
    The impact tool of each of the aforementioned systems may further comprise: a slotted cap adapted for seating over a driver end of the impact tool, the slotted cap being adapted to seat over a portion of one end of the driver plate.
    The slotted cap of the above-mentioned system may be made of acetal resin.
    The compression plate and the driver plate of each system mentioned above may be made of acetal resin.
    In a preferred system for inserting a wave spring, the compression plate includes at least two dovetail grooves, and the driver plate has two dovetail guide rails, and these dovetail guide rails are adapted for seating within the dovetail grooves.
    The compression plate of each of the aforementioned systems may further comprise: two side rails adapted to support the compression plate in a slot of an electrical machine, and wherein the two side rails are adapted to allow alignment of the wave spring.
    The impact tool of any of the aforementioned systems may further comprise: a slotted cap adapted for seating over a driver end of the impact tool, the slotted cap being adapted to seat over a portion of one end of the driver plate.
    According to yet another aspect, a method for inserting a wave spring is provided in a slot of an electric machine. The method includes the steps of providing a compression plate having at least one groove, wherein the compression plate includes a ramped portion at one end thereof, and the ramped portion is adapted to exert a compressive force on the wave spring as the wave spring passes the ramped portion. Another step is used to provide a driver plate with at least one guide rail, and the guide rail is adapted to sit within the at least one groove. Additional steps are provided for providing a striking tool adapted to engage the driver plate and apply a driving force to the driver plate, place the wave spring on the compression plate, place the wave spring and the compression plate at least partially in a slot of an electric machine, and used to activate the impact tool on the driver plate to apply impact force to the driver plate and the wave spring. The wave spring is driven into the slot by the impact tool, the driver plate and the ramped portion of the compression plate.
    The method may further include the step of:
    Providing the at least one groove as at least one dovetail groove.
    Each method mentioned above may further comprise: providing the compression plate with two dovetail grooves.
    [0020] Each method mentioned above may further comprise the step of providing the compression plate with two side rails adapted to support the compression plate in a slot of an electrical machine, and wherein the two side rails are adapted to allow alignment of the wave spring ,
    Each method mentioned above may further comprise the step of providing the at least one guide rail as at least one dovetailed rail.
    Each method mentioned above may further comprise the step of providing the driver plate with two dovetailed rails.
    [0023] Each method mentioned above may further comprise the step of providing the impact tool with a slotted cap adapted for seating over a driver end of the impact tool, and wherein the slotted cap is adapted to over a portion of one end of the driver plate to sit.
    BRIEF DESCRIPTION OF THE DRAWINGS These and other features, aspects, and advantages of the present invention will become better understood when the following detailed description is read with reference to the appended claims, in which like reference characters designate like parts throughout the drawings, in which: FIG :
    FIG. 1 is a partial isometric view of a portion of the stator of an electric machine illustrating a stator wedge assembly according to one embodiment of the invention; FIG.
    FIG. 2 illustrates a measuring system associated with an exemplary wave spring used with the electric machine of FIG. 1; FIG.
    Fig. 3 illustrates an isometric view of a system for inserting a wave spring into a slot in an electric machine according to one aspect of the present invention;
    FIG. 4 illustrates an isometric view of the system according to one aspect of the present invention; FIG.
    5 illustrates a cross-sectional view of the system partially inserted into a slot of an electric machine according to an aspect of the present invention; and
    Fig. 6 illustrates an isometric view of a slotted cap according to one aspect of the present invention.
    Detailed Description of the Invention One or more specific embodiments of the present invention will be described below. In an effort to provide a concise description of these embodiments, not all features of an actual implementation in the patent may be described. It should be appreciated that in the development of any such actual implementation, as with any engineering or design project, numerous implementation-specific decisions must be made in order to meet the specific objectives of the developer, such as e.g. Matching with system-related and business-related constraints, which can vary from one implementation to another. Further, it should be appreciated that such development effort may be complex and time consuming, but nevertheless would be a routine task to the ordinary skilled person with the benefit of this disclosure in terms of design, manufacture, and manufacture.
    When elements of various embodiments of the present invention are employed, the articles "one, one, one, the, the, and the said, said," mean that one or more of the elements can be present. The terms "comprising", "containing" and "having" are intended to be inclusive and to have the meaning that additional elements other than the listed elements may be present. All examples of operating parameters and / or environmental conditions do not exclude further parameters / conditions of the disclosed embodiments. Further, unless explicitly stated to the contrary, embodiments that "include" or "have" one or more elements having a particular property may include additional such elements that do not have this property.
    Fig. 1 illustrates a partial isometric view of a portion of a stator core of an electric machine having a stator wedge mechanism. The stator core 10 includes a plurality of stator teeth 12; the stator teeth 12 further including stator slots 14 adapted to receive stator windings 16 (also referred to as the stator coils). The stator windings 16 are held in the stator slots 14 by a plurality of flat plates 15, shims 18, upper shaft springs 20, and beveled edges 21 with chamfered edges 22 for engagement with correspondingly shaped grooves 24 in the sidewalls of the stator teeth 12. In various applications, the flat plate 15 may include a conductive metallic flat plate or a non-metallic flat plate (non-conductive). The upper wave springs 20 are compressed between the stator wedges 21 and shims 18 to produce a force that holds the stator windings 16 in place. The upper wave spring 20 may be made of a non-conductive material such as, but not limited to, a plastic laminate. The stator core 10 may also include a plurality of side wave springs 26 to ensure close fit of the stator windings 16 in the stator core 10. The side wave spring 26 may be made of a conductive or non-conductive material, such as, but not limited to, a plastic laminate or a glass fiber composite.
    Over time, the upper wave springs 16 and / or the side wave springs 26 may lose their elasticity so that the stator wedge system becomes loose. This may cause the stator windings 16 to vibrate, which may cause damage to the stator core 10 and possible failure of the electric machine.
    Fig. 2 illustrates a side wave spring 26. As shown in an isometric view, the side wave spring 26 has an uncompressed height h and a wave cycle along the length L. However, the wave cycle may also extend at a 45 degree angle with respect to the length L or at any other suitable angle as desired in the specific application. It should be noted that the wave spring length L and a width d are variably selected depending on the size of the stator slot (shown as slot 14 in FIG. 1). In another embodiment, the side wave spring 26 is multi-layered with an upper section layer, a middle section layer, and an opposing lower section layer.
    FIG. 3 illustrates an isometric view of a system 300 for inserting a wave spring into a slot in an electric machine according to one aspect of the present invention. By way of example only, a wave spring may be a side wave spring. The electric machine may be a motor or a generator. The system includes a compression plate 310 having at least one groove 312 and a ramped portion 314 at one end thereof. The groove 312 may be formed as a dovetail groove. According to one aspect of the present invention, the compression plate 310 may include one or more dovetail grooves 312. The compression plate 310 may include two side rails 316 configured to support the compression plate 310 in a slot of an electric machine. The two side rails 316 can be used to allow alignment of the wave springs. By way of example only, the compression plate, the side rails, and / or the ramp portion 314 may be made of an acetal resin.
    A driver plate 320 includes at least one guide rail 322 and is adapted for seating in the groove 312. The guide rail 322 may be configured as a dovetailed rail. According to one aspect of the present invention, the driver plate 320 includes two or more dovetailed rails 322. By way of example only, as an example, the driver plate and the guide rails may be made of an acetal resin.
    An impact tool 330 is configured to engage the driver plate 320 and to apply a driving force to the driver plate 320. The percussion tool 330 may be a hand-held percussion hammer, hand held percussion roller or any other suitable tool for applying a driver force to the driver plate 320. For example, impact tool 330 may be a pneumatically driven or electrically driven
    Be hammer / nailer. The impact tool 330 also includes a slotted cap 332 that is adapted for seating over a driver end of the impact tool 330. The slotted cap 332 is also adapted for seating over a portion of one end of the driver plate 320. By way of example only, the slotted cap may be made of an acetal resin.
    FIG. 4 illustrates an isometric view of the system 300 and a wave spring 426 placed on the compression plate 310. Using the system 300, a wave spring 426 is placed on the compression plate 310 and the compression plate 310 is configured to at least partially retain the wave spring. For example, the wave spring 426 may be retained by the base of the compression plate 310, the ramp portion 314, the side rails 316, and / or the end of the driver plate 320. The ramped portion 314 is configured to exert a compressive force on the wave spring as the striking tool 330 and the driver plate 320 push the wave spring over the ramped portion 314.
    Fig. 5 illustrates a cross-sectional view of the system 300 partially placed in a slot of an electrical machine. A stator winding 16 is located between two stator teeth 12 and in the slot 14. A wave spring 426 is to be inserted between the stator winding 16 and the opposite slot surface 14, and the wave spring travels in the direction indicated by an arrow 550. The compression plate 310 and the wave spring are placed in the slot 14 and both elements are on top of the stator winding 16. The driver plate is placed on top of the wave spring (with respect to the drawing view) and the (not shown in FIG. 5) Impact tool is placed on top of the driver plate 320 and used to drive the wave spring 426 down into the slot 14. The ramped surface 314 compresses the wave spring 426 as the wave spring passes the ramped surface, thereby permitting insertion of the wave spring between the stator winding 16 and an opposite surface of the slot 14. After the first wave spring is inserted, the next stator winding can be inserted and the process repeated. The side rails 316 may also be configured for removal and attachment to the compression plate 310 so that various sizes of side rails may be used to accommodate different widths of slots 14.
    FIG. 6 illustrates an isometric view of the slotted cap 332. The slotted cap 332 includes a first slot 610 that is adapted to receive and seat over the driver plate 320. Secondary slots 620 may be used to facilitate installation of the cap on impact tool 330.
    In accordance with another aspect of the present invention, there is also provided a method of deploying a wave spring. The method includes the steps of providing a compression plate having at least one groove, wherein the compression plate has a ramped portion at one end thereof and the ramped portion is adapted for applying a compression force to the wave spring while the wave spring passes the ramped portion. A further step provides a driver plate with at least one guide element, wherein the guide element is adapted to sit in the at least one groove. The method also includes the step of providing an impact tool configured to engage the drive plate and apply a drive force to the drive plate.
    The method also includes the steps of placing the wave spring on the compression plate, placing the wave spring and the compression plate at least partially in a slot of an electric machine, and placing the impact tool on the drive plate. A subsequent step is used to activate the impact tool to apply impact force to the driver plate and the wave spring, and the wave spring is driven into the slot by the impact tool, the driver plate, and the ramped portion of the compression plate. The method may also include the additional steps of providing the at least one groove as at least one dovetail groove, providing the compression plate with two dovetail grooves, providing the at least one guide element as at least one dovetailed element, and providing the driver plate with two dovetailed elements. Additionally, the method includes the steps of providing the compression plate with two side rails configured to support the compression plate in a slot of an electric machine, the two side rails configured to allow alignment of the wave spring, and providing the impact tool with a slotted cap adapted for seating over a driver end of the impact tool, and wherein the slotted cap is adapted for seating over a portion of one end of the driver plate.
    This description uses examples to disclose the invention, including its best mode, and also to enable any person skilled in the art to practice the invention, including the manufacture and use of all elements and systems and practice of all methods involved. The patentable scope of the invention is defined by the claims, and may include other examples that will be apparent to those skilled in the art. Such other examples are intended to be within the scope of the invention if they have structural elements that do not differ from the literal language of the claims, or if they include equivalent structural elements with insubstantial differences from the literal languages of the claims.
    权利要求:
    Claims (9)
    [1]
    10 stator core 12 stator teeth 14 stator slots 15 flat plates 16 stator windings 18 shims 20 upper wave spring 21 wedge 22 beveled edge 24 groove 26 side wave spring 300 system 310 compression plate 312 groove 314 ramped section 316 side rail 320 driver plate 322 guide rail 330 impact tool 332 slotted cap 426 Wave spring 550 part 610 slot 620 slot claims
    A system (300) for inserting a wave spring (20, 26, 426) into a slot (14) of an electric machine, the system (300) comprising: a compression plate (310) having at least one groove (312); Compression plate (310) includes a ramped portion at one end thereof; a driver plate (320) having at least one guide rail (322), the at least one guide rail (322) being adapted for seating within the at least one groove (312); an impact tool (330) configured to engage the drive plate (320) and apply a drive force to the drive plate (320); wherein the compression plate (310) is adapted to at least partially retain the wave spring (20, 26, 126) and the ramp shaped portion is adapted to exert a compression force on the wave spring (20, 26, 426) while the impact tool (330) and the drive plate (320) drives the wave spring (20, 26, 426) over the ramped portion to drive the wave spring (20, 26, 426) into the slot (14) of the electric machine.
    [2]
    The system (300) of claim 1, wherein the at least one groove consists of at least one dovetail groove (312).
    [3]
    The system (300) of claim 2, wherein the compression plate (310) further comprises: two side rails (316) adapted to support the compression plate (310) in the slot (14) of the electrical machine, and wherein the two side rails (316) are adapted to allow alignment of the wave spring (20, 25, 426).
    [4]
    The system (300) of claim 1, wherein the at least one guide rail consists of at least one dovetailed rail (322).
    [5]
    The system (300) of claim 1, wherein the impact tool (330) further comprises: a slotted cap (332) adapted for seating over a driver end of the impact tool (330), and wherein the slotted cap (332) for a seat is arranged over a portion of one end of the drive plate (320).
    [6]
    The system (300) of claim 5, wherein the protected cap (332) is made of an acetal resin.
    [7]
    The system (300) of claim 1, wherein the compression plate (310) and the driver plate (320) are made of an acetal resin.
    [8]
    The system (300) of claim 2, wherein the compression plate (310) has two dovetail grooves (312); wherein the driver plate (320) has two dovetailed guide rails (322), each guide rail being adapted for seating within a dovetailed groove (312).
    [9]
    A method of inserting a wave spring (20, 26, 426) into a slot (14) of an electrical machine, the method comprising the steps of: providing a compression plate (310) having at least one groove (312), the compression plate (310 ) includes a ramped portion at one end thereof, and the ramped portion is adapted to exert a compression force on the wave spring (20, 26, 426) while the wave spring (20, 26, 426) passes through the ramped portion; Providing a driver plate (320) having at least one guide rail (322), the guide rail (322) being adapted to sit within the at least one groove (312); Providing an impact tool (330) adapted to engage the drive plate (320) and apply a drive force to the drive plate (320); Placing the wave spring (20, 26, 426) on the compression plate (310); Placing the wave spring (20, 26, 426) and the compression plate (310) at least partially into the slot (14) of the electric machine; Placing the impact tool (330) on the driver plate (320); Activating the impact tool (330) to apply impact force to the driver plate (320) and the wave spring (20, 26, 426); wherein the wave spring (20,25,426) is driven by the impact tool (300), the driver plate (320) and the ramped portion of the compression plate (310) into the slot (14).
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    同族专利:
    公开号 | 公开日
    CN103701269A|2014-04-02|
    JP2014073075A|2014-04-21|
    DE102013110226A1|2014-03-27|
    US20140082944A1|2014-03-27|
    CH707019A2|2014-03-31|
    US8959736B2|2015-02-24|
    CH707019A8|2014-08-29|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3602974A|1968-11-05|1971-09-07|Albert C Koett|Pierce nut fastening means and method|
    JPS55117448A|1979-03-22|1980-09-09|Mitsubishi Electric Corp|Method for assembling structure in slot of rotating-electric machine|
    JPS62202038U|1986-06-11|1987-12-23|
    JPH03155356A|1989-11-08|1991-07-03|Toshiba Corp|Assembly of winding conductor securing wedge|
    US5325008A|1992-12-09|1994-06-28|General Electric Company|Constrained ripple spring assembly with debondable adhesive and methods of installation|
    US6927505B2|2001-12-19|2005-08-09|Nikon Corporation|Following stage planar motor|
    GB0223487D0|2002-10-09|2002-11-13|Alstom Switzerland Ltd|Armature bar mounting|
    CN2594549Y|2002-12-27|2003-12-24|沈阳黎明航空发动机有限责任公司|Elastic device for making rotation part to shift on high speed axle freely|
    US7112909B2|2004-02-17|2006-09-26|General Electric Company|Method and system for measuring wedge tightness|
    US7891075B2|2005-01-19|2011-02-22|Gm Global Technology Operations, Inc.|Reconfigurable fixture device and method for controlling|
    JP5410376B2|2010-07-12|2014-02-05|株式会社日立製作所|Method of fixing rotating electric machine stator winding and insulating wave spring for holding winding used therefor|
    US8310120B2|2010-08-30|2012-11-13|General Electric Company|System and method for monitoring health of electrical machines|
    US8959736B2|2012-09-27|2015-02-24|General Electric Company|System and method for inserting ripple springs|US8959736B2|2012-09-27|2015-02-24|General Electric Company|System and method for inserting ripple springs|
    US9825500B2|2014-08-28|2017-11-21|General Electric Company|Planar-ended ripple spring and hardened stator bar armor|
    法律状态:
    2014-08-29| PK| Correction|Free format text: ERFINDER BERICHTIGT. |
    2017-03-15| NV| New agent|Representative=s name: GENERAL ELECTRIC TECHNOLOGY GMBH GLOBAL PATENT, CH |
    2018-04-30| PL| Patent ceased|
    优先权:
    申请号 | 申请日 | 专利标题
    US13/628,139|US8959736B2|2012-09-27|2012-09-27|System and method for inserting ripple springs|
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