• 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:
    The invention relates to a wave spring (100) having a body (102) having a central portion (104) with a substantially sinusoidal surface (106) and a substantially planar end portion (120) extending from each end (122, 122). 124) of the central portion (104) emanates. Also disclosed is a stator bar having a reinforcing layer containing a glass composite impregnated with a novalac epoxy resin.
    公开号:CH710055A2
    申请号:CH01182/15
    申请日:2015-08-17
    公开日:2016-02-29
    发明作者:Anthony Salvatore Arrao；James Jun Xu
    申请人:Gen Electric；
    IPC主号:
    专利说明:

    CROSS-REFERENCE TO RELATED APPLICATIONS
    This application claims the benefit of priority to pending US Provisional Application No. 62 / 043,187, filed on Aug. 28, 2014. The above-identified application is incorporated herein by reference in its entirety, with all its contents herein to provide continuity to create the revelation.
    BACKGROUND TO THE INVENTION
    [0002] The disclosure generally relates to stators, and more particularly to a corrugated spring having generally planar end portions to reduce the tendency for abrasion-induced damage to a stator winding, and a stator bar having a heat-resistant and cured armor layer.
    Armature windings, also referred to as stator bars or windings, are routinely inspected in power generators during scheduled shutdowns to check their operability. In some generators, a stator yoke surrounds an armature core in the generator and partially encloses the armature windings. The stator windings are formed of a plurality of copper wires wound in the armature to form circular loops. The armature windings may be disposed within a stator slot in such a manner that the generator can maintain desired voltage, current, and lifetime characteristics during operation.
    The stator windings of a power generator are typically subject to various loads, such as electromagnetic and mechanical forces, electric field, chemical and thermal loads. The mechanical stress acting on the surface of a stator bar can be exerted laterally, radially and axially. These lateral and radial movements of the rod in the slot are typically intercepted with a restraint system that includes corrugated springs that apply a radial or circumferential restraining force to the stator to assist in reducing the movement of the stator bar windings within the stator slot.
    The modern winding retention system that dampens the lateral movement of a stator winding can use thousands of corrugated springs. The corrugated springs, which are arranged along the stator bars and between the stator core and the bars, are called side wave springs. They are typically compressed to about 70-90%. A conventional single wave spring includes wave arches to absorb the vibration displacement of a stator winding within the wave amplitude. The forces exerted on the stator bar are relatively high near the end of the slot. Thus, when a corrugated spring wears, the lateral forces of the stator bar can increase the abrasion damage to the surfaces on both the spring and the armored stator bar. The phenomenon can shorten the life of a designed stator winding, causing an unplanned downtime and possibly resulting in failure costs. Another attrition problem can occur when an uneven, machined wave surface on the edge or end of a side wave spring rubs against the armored glass layer of the stator bar. In this case, the reduced thickness of the abraded wall insulation can increase the frequency and need for repairs or replacement. The surfaces of the stator windings can also be worn by the wave crest of the wave spring.
    BRIEF DESCRIPTION OF THE INVENTION
    A first aspect of the disclosure provides a corrugated spring comprising: a body having a central portion with a substantially sinusoidal surface and a substantially planar end portion extending from each end of the central portion.
    In the aforementioned wave spring, the substantially sinusoidal surface may have an amplitude that extends along a first axis, and each substantially planar end portion may be approximately at a location having an average amplitude of the substantially sinusoidal surface from the substantially sinusoidal Surface go out.
    In one embodiment, the body may comprise a plurality of layers containing glass fibers arranged in a glass direction, wherein the body may extend in a longitudinal direction, and wherein the substantially sinusoidal surface may include a plurality of peaks and valleys that are located in one another extend a Wellenbergrichtung.
    In a configuration of the last-mentioned embodiment, the longitudinal direction and the Wellenbergrichtung can be aligned substantially perpendicular to each other.
    In addition, the glass direction may be substantially parallel to the Wellenbergrichtung.
    Alternatively, the glass direction may be at an angle other than substantially perpendicular or substantially parallel to the waveguide.
    Further, the glass direction may be arranged substantially parallel to the longitudinal direction.
    In another configuration of the last-mentioned embodiment, the waveguide may be disposed at an angle other than substantially perpendicular to the longitudinal direction.
    Additionally, the glass direction may be at an angle other than substantially perpendicular or substantially parallel to the longitudinal direction.
    Alternatively, the glass direction may be arranged at an angle substantially perpendicular to the longitudinal direction.
    As a further alternative, the glass direction may be arranged substantially parallel to the longitudinal direction.
    In the last-mentioned embodiment of the corrugated spring of any of the above-mentioned types, the plurality of layers may include a plurality of glass layers, each layer including at least two glass bundles arranged substantially perpendicular to each other.
    In any of the corrugated springs mentioned above, each substantially planar end portion may have rounded edges.
    In one embodiment, the body may include a novalac epoxy-impregnated semiconductive E-glass composite, and may further comprise a carbon-glass fiber layer over the novalac-epoxy-impregnated semiconducting E-glass composite.
    In another embodiment, the corrugated spring may further include a sacrificial wear plate extending along and integrally connected to the body.
    In yet another embodiment, the wave spring may be a side wave spring.
    The wave spring of any of the above-mentioned types may further be combined with: an electric machine having a rotor and a stator, the stator having a stator core with a plurality of stator slots; a plurality of stator bars substantially contained within the plurality of stator slots; and wherein the corrugated spring is disposed between at least one of the plurality of stator bars and the stator core.
    In the last-mentioned combination, the corrugated spring may further comprise a reinforcing layer over at least one of the plurality of stator bars, the reinforcing layer including a glass composite impregnated with novalac epoxy resin.
    In addition, the reinforcing layer may have a Shore D hardness of about about 92.
    A second aspect is directed to a stator bar having: a stator bar core; a semiconductive layer deposited around the stator core; an insulating layer applied around the semiconductive layer; and a reinforcing layer at least partially applied around the insulating layer, the reinforcing layer including a novalac epoxy resin impregnated glass composite.
    In the aforementioned stator bar, the reinforcing layer may have a Shore D hardness of over about 92.
    A third aspect of the disclosure provides a stator bar having: a stator bar core; a semiconducting layer disposed around the stator core; an insulating layer disposed around the semiconductive layer; and a reinforcing layer at least partially disposed around the insulating layer, the reinforcing layer including a flexible ceramic substantially U-shaped tube configured to conform to the shape of a surface of the insulator layer.
    The illustrative aspects of the present disclosure are intended to solve the problems described herein and other problems not discussed.
    BRIEF DESCRIPTION OF THE DRAWINGS
    These and other features of the disclosure will become more apparent from the following detailed description of the various aspects of the disclosure, when read in conjunction with the accompanying drawings, in which various embodiments of the disclosure are illustrated, and in which:<Tb> FIG. Fig. 1 <SEP> shows an end perspective view of a conventional electric machine;<Tb> FIG. Figure 2 shows a partial exploded view of a portion of a stator core and slots of an electrical machine shown in Figure 1;<Tb> FIG. Fig. 3 <SEP> shows a partial cross-sectional view of a groove in a stator of an electric machine;<Tb> FIG. Figure 4 shows a cross-sectional view of a corrugated spring according to embodiments of the invention;<Tb> FIG. Figures 5 and 6 show plan views of a corrugated spring according to embodiments of the invention;<Tb> FIG. Figure 7 shows a cross-sectional view of a body of the corrugated spring according to embodiments of the invention;<Tb> FIG. 8-14 show schematic plan views of glass, wave crest / valleys and longitudinal direction arrangements of the corrugated spring according to embodiments of the invention;<Tb> FIG. Figure 15 shows a cross-sectional view of a sacrificial wear plate for use with a wave spring according to embodiments of the invention;<Tb> FIG. Figure 16 shows a cross-sectional view of an alternative embodiment of the sacrificial wear plate of Figure 15;<Tb> FIG. 17 shows a cross-sectional view of a stator bar having a packing layer in accordance with embodiments of the invention.
    Note that the drawings of the disclosure are not to scale. The drawings are intended to depict only typical aspects of the disclosure and, therefore, should not be considered as limiting the scope of the disclosure. In the drawings, like numbers represent elements that are the same in the drawings.
    DETAILED DESCRIPTION OF THE INVENTION
    Fig. 1 is an end perspective view of a conventional electric machine 10. The electric machine 10 has a core 16 with a plurality of stator slots 12 for receiving a winding to generate an electromagnetic flux. The stator slots 12 are configured to receive stator windings to be disposed in the stator slots defined around an inner periphery of the core 16 (also referred to as a stator core). The stator windings may consist of a plurality of Flachstableitern or Statorstäben, which are connected together to form a predetermined winding path. In one aspect of the invention, the stator bars are formed by entangling (twisting) the rectangular copper cord package. A rotor (not shown) may be disposed within an opening 18 in the stator core 16 where an air or coolant gap is defined between the rotor and the stator core 16. A partial exploded view of the stator is shown by reference numeral 20, which is described in detail with reference to FIG. The electric machine 10 may be any electric rotating machine or dynamo-electric machine, including a motor or a generator.
    FIG. 2 shows a partial exploded view of a portion of an electric machine 10 of FIG. 1. FIG. In one aspect of the invention, the stator 20 includes a lower stator bar 22 and an upper stator bar 24, and one or more slot fillings 26, 28 are disposed at least in part within the individual stator slots 21. The wedge or restraint system includes a retainer or corrugated spring 32. In one aspect of the invention, the retainer includes a corrugated spring 32 at least partially disposed within a stator slot 21 such that the corrugated spring 32 contacts the slot fill 26 and / or groove fill 28 borders. Then, the corrugated spring 32 is secured in the stator groove 21 using a plurality of stator wedge sliders 34 and stator wedges 36. For example, movement of the stator wedge sliders 34 in a first direction indicated by the arrow 38 and with respect to the stator keys 36 or movement of the stator keys 36 in a second direction indicated by the arrow 40 calls in FIG Referring to the stator wedge sliders 34, a restraining pressure on the inner (lower) stator rod 22 and the upper stator rod 24 to assist securing the inner (lower) stator rod 22 and the outer (upper) stator rod 24 in the stator slot 21. The corrugated spring 32 can also be arranged on the side of the stator bars 22, 24, if it is provided with an additional semiconducting property and an enlarged dimension, in which case it can be called a side wave spring.
    Fig. 3 shows a cross-sectional view of a conventional stator groove. The stator 40 may include a stator core 42 and is part of a dynamo-electric machine or electrical machine, such as a motor or a generator. The stator core 42 includes a plurality of radially extending stator slots 44 for receiving stator bars 46 and 48. It will be appreciated that the stator core 42 extends about a central axis and that the stator slots 44 as well as the stator bars 46 and 48 are longitudinally parallel to this axis and extend generally in a direction radially inward. In the illustrated form, the side corrugated springs 50 and 52 hold the stator bars 46, 48 firmly pressed against the opposite sides of the stator slots 44. The side corrugated springs 50 and 52 may also be replaced by one of the corrugated springs 100 (Figures 4-7), as described in more detail below. A radial clearance in the stator slots 44 can be occupied by radial fillings 60. An upper retainer assembly 62 includes stator wedges 64 that extend longitudinally along a radially inner portion of the stator slots 44 with their lateral edges housed in shaped notches or dovetails 66 formed in the stator slots 44 and an upper corrugated spring 68. which is at least partially disposed within the stator groove 44, so that the upper corrugated spring 68 is adjacent to at least one groove fill 70. Then, the upper wave spring 68 is secured in the stator groove 44 using a plurality of stator wedge sliders 72 and stator wedges 64. The upper corrugated spring 68 can also be replaced by one of the corrugated springs 100, which are described in more detail below.
    A wave spring 100 according to embodiments of the invention is shown in Figs. 4-6. Fig. 4 is a cross-sectional view, and Figs. 5 and 6 are plan views of some alternative embodiments. Referring to FIG. 4, a corrugated spring 100 includes a body 102 including a central portion 104 having a substantially sinusoidal surface 106. In essence, the sinusoidal portion 106 includes a number of substantially uniformly spaced depressions or valleys 110 and crests 108. In contrast to conventional corrugated springs 50, 52, 68 (FIG. 3), the corrugated spring 100 includes a substantially planar end portion 120 extending from each end 122, 124 of the middle section 104. Each planar end portion 120 may extend over a length configured to prevent wear of the wave spring on adjacent coil bars and the stator core. For example, for a corrugated field 100 of about 365 to 427 centimeters (cm) (about 12 to 14 feet in length), each end portion 120 may extend over about 30-61 cm (about 1-2 inches). Other dimensions may also be possible. In addition, a wavelength of the sinusoidal portion 104, i. the distance between the crests 108, the number of crests / valleys, and the amplitude A are selected to suit a particular stator configuration. In one embodiment, at least 4 sets of crests and valleys are used, each wave cycle being about 60 cm (2.4 inches for the side wave spring) or 30 cm (1.2 inches for the upper wave spring); however, the number, wavelength, and amplitude of a complete wave (wave to valley to adjacent wave crest) can be varied depending on the application and slot spacing. In one embodiment, each substantially planar end portion 120 may have rounded edges or corners 124, but this is not always necessary. For example, when placed in the center of the groove, where the possible lateral movement of the rod is less likely and insignificant, it is not absolutely necessary for the edge of the planar end portions 120 to be rounded.
    As shown in FIG. 4, in one embodiment, the substantially sinusoidal surface 106 has an amplitude A that extends along a first axis (along the length of the body 102) and each substantially planar end portion 120 extends substantially from the substantially sinusoidal surface 106 from a mid-amplitude location (A / 2) of the substantially sinusoidal surface 106. In this manner, the end portions 120 have equal spacings within the amplitude A, whereby the end portions 120 within one Space between, for example, as shown in Fig. 3, the stator core 42 and the stator windings 46, 48 or the Statornutfüllung 70 and the Statorkeilschiebern 72 are arranged equidistant. As a result, the end portions 120 allow compression to the conventional degree of 75% or more, and they allow the end portion 120 to uniformly contact the surface of the stator bar. The substantially planar end portions 120 have the effect of substantially eliminating the likelihood that the wavy edge of a side wave spring will deeply cut into the surfaces of the stator bar. As a result, damage to the stator bar is eliminated by a corrugated spring, while retaining all the restraining properties of a corrugated spring.
    As shown in FIG. 4, the body 102 may include multiple layers 128. The layers 128 may each contain glass fibers. For example, the body 102 may include, but is not limited to, a novalac epoxy-impregnated semiconducting E-glass composite such that it has high heat resistance (e.g., a glass transition temperature Tg of about 150-210 ° C). The glass may include, for example, unidirectional electrical grade (E-glass) glass fibers, carbon glass fibers, or aluminoborosilicate glass containing less than 1 weight percent alkali oxides, or other conventional forms of materials. In one embodiment, the layers 128 may each comprise a plurality of sheets 130 (FIG. 7) of glass, each layer having two bundles of the glass arranged substantially perpendicular to each other. For example, and as schematically illustrated in FIG. 7, three glass bundles are shown running across the page (top, center, bottom) and the other three extending into and out of the page (other three Layers). In one embodiment, the body 102 may also include a carbon fiberglass layer 132 over the epoxy-impregnated semiconductive E-glass composite. The body 102 may have been cast or otherwise formed into the shape disclosed herein.
    The outer bundle in a ply (130, top, bottom) is arranged in a similar manner, indicating a glass direction GD, i. E. indicates the direction of the glass fibers in the outer bundles of layers 128. The glass direction GD is indicated in the drawings (Figs. 5-14) with a dashed line overlying the structure. In Figs. 5, 6 and 8, the body 102 is indicated as extending in a longitudinal direction LD. Further, as shown in FIGS. 5, 6, and 8 by solid lines that overlay the structure, the substantially sinusoidal surface includes a plurality of peaks 108 (FIG. 4) and valleys 110 (FIG. 4) extending in FIG a wave mountain / valley direction RD extend. The solid line for the arrangement of the Wellenbergrichtung RD and the dashed line for the arrangement of the glass direction GD is maintained by the in Fig. 9 - 14 schematically illustrated alternative embodiments. In these figures, the length direction of the body extends over the side.
    Figs. 5 and 6 show embodiments of a Wellenbergrichtung RD against a glass direction GD and a longitudinal direction LD, and Figs. 8 - 14 show similar or alternative embodiments.
    In Figs. 6, 8, 11 and 12, the longitudinal direction LD (the length of the body 102) and the waveguide RD (solid lines) are substantially perpendicular. In FIG. 6, the glass direction GD (dashed line, only one line shown for the sake of clarity) is arranged substantially parallel to the longitudinal direction LD. In Figs. 8 and 11, the glass direction GD (dashed line) is disposed at an angle other than substantially perpendicular or substantially parallel to the waveguide RD (solid line), e.g. below about plus or minus 30 ° to 60 ° and preferably about +/- 45 °. In Fig. 12, the glass direction GD is substantially parallel to the waveguide RD.
    In Figs. 5, 9, 10, 13 and 14, the wave direction RD (solid lines) is at an angle other than substantially perpendicular to the longitudinal direction LD, e.g. between about plus or minus (+/-) 30 ° to 60 ° and preferably about +/- 45 °. In Fig. 13, the glass direction GD (dashed lines) is disposed at an angle substantially perpendicular to the longitudinal direction LD. In Fig. 10, the glass direction GD (dashed lines) is substantially parallel to the longitudinal direction LD. In Figs. 5, 9 and 14, the glass direction GD (dashed line) is also disposed at an angle other than substantially perpendicular or substantially parallel to the longitudinal direction LD, e.g. below about plus or minus 30 ° to 60 ° and preferably about +/- 45 °. Figs. 5 and 9 show substantially the same embodiment.
    Reference is now made to FIG. 15, which shows that in an alternative embodiment, a sacrificial wear plate 140 may extend along the body 102 to provide further resistance to wear of the wave spring 100. A single sacrificial wear plate 140 having the same length as a single wave spring may be made of the same material as the wave spring 100. The sacrificial wear plate 140 may be integrally formed with the body 102, e.g. it may be attached to the corrugated spring 100 or attached or molded. In another embodiment, illustrated in FIG. 16, each substantially planar end portion 120 extending from the substantially sinusoidal surface 106 need not be formed at a position approximately equal to the mean amplitude of the substantially sinusoidal surface to intersect to fit a conventional molding process.
    The wave spring 100 described herein is typically used as a side wave spring (e.g., to replace the wave springs 50, 52 in Fig. 3). However, the structure may also be applicable to a top wave spring (e.g., 68 in Fig. 3) with a dimensional change and elimination of a semiconducting property.
    Referring to Figures 3-6, a corrugated spring 100 according to embodiments of the invention may be used in combination with an electric machine 10 (Figure 1) having a rotor and a stator. As described with reference to FIG. 3, the stator may include a stator core 42 having a plurality of stator slots 44 and a plurality of stator bars 46 substantially contained within the plurality of stator slots 44. The wave spring 100 may be disposed between at least one of the plurality of stator bars 46, 48 and the stator core 42. The corrugated spring may be dense near the end of the groove along the length of the stator rod because of the strong lateral motive force near the end of the groove and less dense in the center of the groove where conventional corrugated springs may be used in combination.
    Referring to Fig. 17, in another embodiment of the invention, a stator bar 200 is provided with a reinforcing layer 202 which provides increased abrasion resistance as compared to conventional systems. The stator bar 200 includes a stator bar core 204 of, for example, an insulated Roebel copper cord package or other suitable material. A semiconducting layer 206 is provided around the stator core 204. For example, the semiconductive layer 206, which may be referred to as an internal grid layer, may include an electrical grade glass ribbon impregnated with a thermoplastic resin whose resistivity should not be less than 10,000 ohms per square. An insulating layer 208 may be provided, e.g. is wound over the semiconductive layer 206. The insulating layer 208 may include, for example, a high heat resistant epoxy resin impregnated mica tape whose glass transition temperature is at least 120 ° C, and preferably at least more than 135 ° C, when properly cured and compacted. A semiconductive armor layer 202 is provided around the insulating layer 208 and, unlike conventional systems, includes a highly heat-resistant Novalac epoxy impregnated glass composite. The taped stator bar is then cured in a process known to those skilled in the art using a temperature profile sufficient to cure the entire stator bar insulating system to the optimum degree of cure, as measured by glass (or softening) transition temperature. By using the high heat resistant and harder Novalac epoxy impregnated glass composite, the reinforcing layer 202 has a Shore D hardness of greater than about 92, which may be sufficient to resist wear by the wave spring, and so forth harder is conventional reinforcing layers made with relatively little heat-resistant, epoxy-impregnated glass ribbon whose glass transition temperature may be below 90 ° C or even below 70 ° C. In addition, the material composition increases the heat resistance of the reinforcing layer 202, e.g. It increases the glass transition temperature above or close to a temperature of the stator core 204 (e.g., the typical generator operating temperature is about 110-135 ° C) or close to that of a wave spring. The composition of such a Novalac epoxy coating may be a combination of two or three epoxies based on epoxied Novalac resin from Dow Chemicals and Momentive liquid bisphenol A epoxy. The small amount of organic solvents, such as toluene, MEK, acetone, may be present to facilitate the production of the reinforcing tape, but the residual solvent may be negligible after the reinforcing tape has been made to tap the stator bar. The crosslinking and catalyst packing may include those with a hydroxyl containing compound with catalyst aluminum acetoacetate. As a result, the wear on the stator bar surface under operating conditions can be significantly reduced. After its positioning, as shown in Fig. 3, the stator bar 200 would be adjacent to a wave spring 100.
    In another embodiment, an attrition resistant ingredient, such as a silicone additive, may be added to the composition of the resin coating that forms the reinforcing layer 202 to lower its surface friction coefficient to a level that reduces wear but not vibration or migration causes the corrugated spring out of the groove.
    In another embodiment, illustrated in FIG. 17, a reinforcing layer 302 may be provided around the insulating layer 208, wherein the reinforcing layer 302 is a flexible, electrically semiconductive, ceramic, substantially U-shaped tube or element 304 (FIG. which is shown dividedly by the extended line 306) adapted to the shape of a surface of the insulating layer and the corners of a stator bar. Two elements 304 would be placed around each stator bar to form a complete layer. The reinforcing layer 302 may be made of a flexible, substantially U-shaped tube material configured to conform to the shape of a surface of the insulating layer 208. In this embodiment, the reinforcing layer 302 may comprise an electrically semiconductive and highly thermally conductive "flexible ceramic tubing" (eg, an alumina-based composition and its combination that makes it flexible) that conforms to the shape of the insulating layer so that when the thin but flexible ceramic armored rod is inserted into the groove (after hardening in the mixing tank) the Stabisoliersystem is well protected against any kind of wear. This U-shaped ceramic armoring layer 302 may be an integral part of the insulating layer 208, or it may be a separate kit and mounted during the stator bar insertion process. Although, in the illustration, it completely surrounds the insulating layer 208, the U-shaped ceramic reinforcing layer may also extend only partially around the insulating layer 208, e.g. within only a single U-shaped element with an open top. The thickness added by this thin, conforming U-shaped tube may leave the groove gap large enough to accommodate the side corrugation spring when compressed between the stator rod and the stator core in the groove. The length of the U-shaped ceramic tube need not be equal to the length of the entire groove. The length of the ceramic tube may be the length of only one or two side corrugated springs, and it may be located near both ends of a groove where the lateral movement of a stator may be strong.
    The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the disclosure. As used herein, the singular forms "one, one," and "the, the," are meant to include plurals as long as the context does not clearly indicate otherwise. Further, it should be noted that the terms "having" and / or "having" when used in this specification indicate the presence of indicated features, integers, operations, elements and / or components, but the presence or addition one or more features, integers, steps, operations, elements, components and / or groups thereof.
    The corresponding structures, materials, acts and equivalents of all devices or step plus functional elements in the claims below are intended to include any structure, material or act to perform the function in combination with other claimed elements as expressly claimed. The description of the present disclosure has been presented for purposes of illustration and description, but is not intended to be exhaustive or limited to the disclosure in the form disclosed. Many modifications and changes that do not depart from the scope and spirit of the disclosure will be apparent to one of ordinary skill in the art. The embodiment has been chosen and described in order to best describe the principles of the disclosure and the practical applications, and to enable others skilled in the art to appreciate the disclosure with respect to various embodiments with various modifications as appropriate to the particular intended use. to understand.
    A wave spring 100 has a body 102 having a central portion 104, 104 with a substantially sinusoidal surface 106 and a substantially planar end portion 120 extending from each end 122, 124 of the central portion 104, 104 , A stator bar 200 may include a reinforcing layer 202, 302 containing a glass composite impregnated with a novalac epoxy resin.
    PARTS LIST
    [0050]<tb> Electric machine <SEP> 10<Tb> stator <September> 12<Tb> core <September> 16<Tb> Opening <September> 18<Tb> stator <September> 20<tb> each stator slot <SEP> 21<tb> lower stator bar <SEP> 22<tb> upper stator bar <SEP> 24<tb> Groove filter <SEP> 26, 28<Tb> corrugated spring <September> 100<tb> Stator Wedge Gate <SEP> 34, 70<Tb> stator wedges <September> 36<tb> Arrow <SEP> 38, 40<Tb> stator core <September> 42<tb> extended stator slots <SEP> 44<tb> Stator Rod Adapters <SEP> 46, 48<tb> Side wave springs <SEP> 50, 52<tb> radial fill <SEP> 60<tb> upper restraint <SEP> 62<Tb> dovetails <September> 66<tb> upper corrugated spring <SEP> 68<Tb> slot fill <September> 70<Tb> Statorkeilschieber <September> 72<Tb> body <September> 102<tb> middle section <SEP> 104<tb> sinusoidal surface <SEP> 106<Tb> wave crests <September> 108<Tb> Valleys <September> 110<Tb> end <September> 120<tb> End <SEP> 122, 124<Tb> layers <September> 128<Tb> sacrificial wear plate <September> 140<Tb> stator <September> 200<tb> Reinforcing Layer <SEP> 202, 302<Tb> Statorstabkern <September> 204<tb> Semiconducting Layer <SEP> 206<Tb> insulating <September> 208<Tb> element <September> 304
    权利要求:
    Claims (15)
    [1]
    A corrugated spring (100) comprising:a body (102) having a central portion (104) with a substantially sinusoidal surface (106) and a substantially planar end portion (120) extending from each end (122, 124) of the central portion (104) ,
    [2]
    The corrugated spring (100) of claim 1, wherein said substantially sinusoidal surface (106) has an amplitude extending along a first axis, and wherein each substantially planar end portion (120) is approximately at a location having an average amplitude of substantially sinusoidal surface emanates from the substantially sinusoidal surface (106).
    [3]
    3. corrugated spring (100) according to claim 1,the body (102) having a plurality of layers (128) containing glass fibers arranged in a glass direction,wherein the body (102) extends in a longitudinal direction, andwherein the substantially sinusoidal surface (106) has a plurality of wave crests (108) and valleys (110) extending into a wave overcenter.
    [4]
    4. wavy spring (100) according to claim 3, wherein the longitudinal direction and the Wellenbergrichtung are aligned substantially perpendicular to each other.
    [5]
    5. wave spring (100) according to claim 3, wherein the Wellenbergrichtung is arranged at an angle other than substantially perpendicular to the longitudinal direction.
    [6]
    6. wave spring (100) according to claim 4 or 5, wherein the glass direction is substantially parallel to the Wellenbergrichtung runs; orwherein the glass direction is disposed at an angle other than substantially perpendicular or substantially parallel to the waveguide; orwherein the glass direction is arranged substantially parallel to the longitudinal direction.
    [7]
    7. wave spring (100) according to any one of claims 3-6, wherein the plurality of layers (128) include a plurality of glass layers, wherein each layer includes at least two glass bundles, which are arranged substantially perpendicular to each other.
    [8]
    8. wave spring (100) according to any one of the preceding claims, wherein each substantially planar end portion (120) has rounded edges.
    [9]
    The corrugated spring (100) of any one of the preceding claims, wherein the body (102) includes a novalac epoxy impregnated semiconductive E-glass composite and further comprising a carbon fiberglass layer over the epoxy impregnated semiconducting E-glass composite.
    [10]
    The corrugated spring (100) of any one of the preceding claims, further comprising a sacrificial wear plate (140) extending along and integrally connected to the body (102).
    [11]
    11. wave spring (100) according to any one of the preceding claims, wherein the wave spring (100) is a side wave spring (100).
    [12]
    12. wave spring (100) according to one of the preceding claims, further in combination with: an electrical machine (10) having a rotor and a stator (20), wherein the stator (20) has a stator core (42) having a plurality of stator slots ; a plurality of stator bars (200) substantially contained within the plurality of stator slots (12); and wherein the corrugated spring (100) is disposed between at least one of the plurality of stator bars (200) and the stator core (42).
    [13]
    The corrugated spring (100) of claim 12, further comprising a reinforcing layer (202, 302) over at least one of said plurality of stator bars (200), said reinforcing layer (202, 302) including a novalac epoxy resin impregnated glass composite;wherein the reinforcing layer (202, 302) preferably has a Shore D hardness greater than about 92.
    [14]
    14. A stator bar (200) comprising: a core of the stator bar (200);a semiconducting layer (206) disposed around the core of the stator bar (200);an insulating layer disposed around the semiconductive layer (206); anda reinforcing layer (202, 302) disposed at least partially around the insulating layer, the reinforcing layer (202, 302) including a glass composite impregnated with a novalac epoxy resin.
    [15]
    A stator bar (200) comprising: a core of the stator bar (200);a semiconducting layer (206) around the core of the stator bar (200);an insulating layer around the semiconductive layer (206); anda reinforcing layer (202, 302) disposed at least in part around the insulating layer, the reinforcing layer (202, 302) including a flexible, ceramic, substantially U-shaped tube configured to conform to the shape of a surface of the Insulating layer to comply.
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    同族专利:
    公开号 | 公开日
    DE102015113345A1|2016-03-03|
    JP2016105681A|2016-06-09|
    CN105471151B|2019-04-09|
    US9825500B2|2017-11-21|
    CN105471151A|2016-04-06|
    US20160065023A1|2016-03-03|
    JP6659272B2|2020-03-04|
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    法律状态:
    2017-03-15| NV| New agent|Representative=s name: GENERAL ELECTRIC TECHNOLOGY GMBH GLOBAL PATENT, CH |
    2019-03-29| AZW| Rejection (application)|
    优先权:
    申请号 | 申请日 | 专利标题
    US201462043187P| true| 2014-08-28|2014-08-28|
    US14/630,870|US9825500B2|2014-08-28|2015-02-25|Planar-ended ripple spring and hardened stator bar armor|
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