• 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 systems for inspecting a dynamoelectric machine. The dynamoelectric machine has a rotor, a stator, and a radial gap existing between the rotor and the stator. The system includes a carriage (300) adapted to be inserted into the radial gap between the rotor and the stator. The carriage (300) is adapted to convey an optical device (320) along the radial gap. The optical device (320) acquires an image of the radial gap, a portion of the rotor, and a portion of the stator. The carriage (300) is adapted to be attached to a push rod (310) and the push rod (310) is used to move the carriage (300) and the optical device (320) along the radial gap. The system is set up for entry into a single end of the dynamoelectric machine. The invention further relates to a method for inspection or maintenance of a dynamoelectric machine.
    公开号:CH710374A2
    申请号:CH01589/15
    申请日:2015-11-02
    公开日:2016-05-13
    发明作者:Aleksander Miasnikov Nicholas；Royal Gammans Jason；Michael Hatley Richard；Michael McDonnell Sean；Ernesto Giannattasio Antonio
    申请人:Gen Electric；
    IPC主号:
    专利说明:

    STATE OF THE ART
    The invention generally relates to the assessment of the state of dynamoelectric machines. In particular, the invention relates to a system and a method for inspecting dynamoelectric machines, in particular electrical generators.
    Dynamoelectric machines, such as electric generators, include a rotor and a stator. Rotors are essentially constructed of a steel forgings and contain a number of slots that run the length of the rotor. The rotors are electrically wound by placing conductors called rotor windings in the slots of the rotor. Stators are essentially constructed of a number of stacked metal sheets. Stators also include slots that run the length of the stator. Stators are electrically wound by placing conductors called stator coils in the armature slots of the stator.
    Conventional stator coils are often held in place in stator slots by means of a retaining arrangement, for example by a stator wedge assembly which includes a stator wedge, an upper support wave spring and one or more intermediate layers. In this construction, a stator coil is placed in an armature groove, an intermediate layer is placed above the stator coil, an upper wave spring is placed above the intermediate layer, and a stator key having a chamfered edge is driven into a groove near the head of the armature groove , whereby the stator coil, the intermediate layer and the upper wave spring are secured. The upper wave spring provides a compressive force to hold the stator coils firmly in the armature groove.
    Over time and during operation of the dynamoelectric machine stator wedges can be loose. If a stator wedge becomes loose, it may allow vibration of a stator coil, which can result in catastrophic failure in an electrical generator. In order to avoid such vibration, it is desirable to periodically examine the strength of the wedge assembly. Such inspections pose a challenge because the wedge assembly is difficult to access in a generator.
    BRIEF SUMMARY OF THE INVENTION
    According to a first aspect of the invention, a system for inspecting a dynamoelectric machine is provided. The dynamoelectric machine includes a rotor, a stator, and a radial gap existing between the rotor and the stator. The system includes a carriage adapted to be inserted into the radial gap between the rotor and the stator. The carriage is adapted to convey an optical device along the radial gap. The optical device is configured to obtain an image of at least one of the radial gap, a portion of the rotor, and / or a portion of the stator. The carriage is adapted to be attached to a push rod, and the push rod is used to move the carriage and the optical device along the radial gap. The system is set up for entry into a single end of the dynamoelectric machine.
    In the aforementioned system, the carriage may further include a base body having a central portion and two end portions, each end portion being connected to the base body via a flexible member.
    In a preferred embodiment, the carriage may further include at least one magnet disposed in each of the end portions.
    In particular, the at least one magnet can be arranged below a surface of the end portion.
    In the last-mentioned preferred embodiment of the system, the carriage may further comprise an attachment point for the push rod and one or more channels adapted for operation in connection with the optical device or a removal device, wherein the one or more channels traversing the central portion, wherein the one or more channels are adapted to allow the optical device and the extraction device to slide through the one or more channels.
    Preferably, the optical device may be a Boroskop, and the removal device may be at least one of a clamp, a magnet, a sling, a gripper, a fork, a basket or a cutting tool.
    In one embodiment, the system may further include an elongated guide member adapted to cooperate with the carriage carriage, wherein at one end of the elongated guide member an expandable bellows is disposed, the elongated guide member having a conduit therefor is arranged to supply a gas to the bellows to fill and empty the bellows, wherein the carriage may have an opening, wherein the elongate guide member may be adapted to pass through the opening, so that the carriage along the elongated guide member forward and moves backwards.
    In the last-mentioned embodiment, the carriage may further comprise an attachment point for the push rod and one or more channels adapted for operation in conjunction with the optical device or a removal device, the one or more channels being arranged therefor , the optical device and the unloading device to allow sliding through the one or more channels.
    In particular, the optical device may be a Boroskop, and the removal device may be at least one of a clamp, a magnet, a loop, a gripper, a fork and a prong, a basket or a cutting tool.
    In addition, or as an alternative, at least one of the one or more channels may be configured to bend at an angle, the angle being about 30 degrees to 90 degrees.
    In each system of the last-mentioned embodiment, the elongate guide member may further comprise a hollow fabric material, wherein a central portion of the fabric material forms the conduit used to fill and empty the bellows.
    According to a further aspect of the invention, a system for inspecting a dynamoelectric machine is disclosed. The dynamoelectric machine includes a rotor, a stator, and a radial gap existing between the rotor and the stator. The system includes a first carriage adapted to be inserted into the radial gap between the rotor and the stator. The first carriage is adapted to convey an optical device along the radial gap. The optical device is configured to obtain an image of at least one of the radial gap, a portion of the rotor, and / or a portion of the stator. The first carriage is adapted to be attached to a push rod, and the push rod is used to move the first carriage and the optical device along the radial gap. A second carriage has an opening and an elongated guide member is adapted to cooperate with the carriage of the second carriage. An expandable bladder is disposed at one end of the elongated guide member, and the elongate guide member has a conduit adapted to supply a gas to the bladder to fill and deflate the bladder. The elongated guide member is adapted to pass through the opening so that the second carriage moves fore and aft along the elongated guide member. The system is set up for entry into a single end of the dynamoelectric machine.
    In the aforementioned system, the first carriage may further include a base body having a central portion and two end portions, each end portion being connected to the base body via a flexible member, and at least one magnet disposed in each of the end portions can.
    In particular, the at least one magnet may be arranged below a surface of the end portion.
    In each system according to the second aspect, both the first carriage and the second carriage may further comprise an attachment point for the push rod and one or more channels adapted for operation in conjunction with the optical device or a removal device, wherein the one or more channels pass through the central portion, the one or more channels configured to allow the optical device and the extraction device to slide through the one or more channels.
    In particular, the optical device may be a Boroskop, and the removal device may be at least one of a clamp, a magnet, a loop, a gripper, a fork or a prong, a basket or a cutting tool.
    In addition, or as an alternative, at least one of the one or more channels of the second carriage may be configured to deflect at an angle, the angle being about 30 degrees to 90 degrees.
    In any system according to the second aspect, the elongated guide member may further comprise a hollow tissue material, wherein a central portion of the tissue material forms the conduit used to inflate and deflate the bladder.
    According to yet another aspect of the invention, a method of inspecting or maintaining a dynamoelectric machine includes the steps of placing a carriage in a radial gap between a rotor and a stator of the dynamoelectric machine. The carriage is adapted to be inserted into the radial gap and to carry an optical device along the radial gap. The optical device is adapted to acquire an image of the radial gap. The carriage is adapted to be attached to a push rod, and the push rod is used to move the carriage and the optical device along the radial gap. A navigation step is used to navigate the carriage axially along the radial gap by pushing or pulling the push rod. An inspection step is used to inspect the radial gap by looking at an image generated from the optical device to identify the presence of any foreign matter or contamination. A sampling step is used to retrieve and remove any debris or contamination discovered in the inspection step.
    The placing step may further include installing an elongate guide member between the stator and the rotor and securing at least one end of the elongated guide member by inflating a bellows. The bellows may be configured to clamp between the rotor and the stator when filled. The placing step may further include placing the carriage over the elongated guide member and installing at least one of the optical device and a removal device through one or more channels in the carriage.
    These and other aspects, advantages, and essential features of the invention will become apparent from the following detailed description, which, taken in conjunction with the accompanying drawings in which like parts are designated by like reference characters, disclose embodiments of the invention.
    BRIEF DESCRIPTION OF THE DRAWINGS
    [0026]<Tb> FIG. 1 <SEP> is a schematic cross-sectional view of a conventional electric generator having a rotor installed in a stator.<Tb> FIG. Figure 2 shows a partial isometric view of a conventional stator in an electric generator as shown in Figure 1.<Tb> FIG. 3 <SEP> illustrates a perspective view of a carriage according to one aspect of the present invention.<Tb> FIG. 4 - 10 <SEP> illustrate perspective views of different sampling devices in accordance with aspects of the present invention.<Tb> FIG. 11 <SEP> illustrates a perspective view of the carriage disposed in the radial gap according to an aspect of the present invention.<Tb> FIG. 12 <SEP> illustrates a perspective view of a carriage according to one aspect of the present invention.<Tb> FIG. 13 <SEP> illustrates a side view of the carriage shown in FIG. 12 disposed in the radial gap of the dynamoelectric machine, according to an aspect of the present invention.<Tb> FIG. 14 <SEP> illustrates a method for inspection and / or maintenance of a dynamoelectric machine according to one aspect of the present invention.<Tb> FIG. Fig. 15 <SEP> shows in a perspective view a carriage according to an aspect of the present invention.<Tb> FIG. 16 <SEP> illustrates in a perspective view a carriage according to an aspect of the present invention.<Tb> FIG. 17 <SEP> illustrates in a perspective view a carriage according to an aspect of the present invention.
    DETAILED DESCRIPTION OF THE INVENTION
    At least one embodiment of the present invention will be described below with reference to its application in connection with the operation of a dynamoelectric machine. Although embodiments of the invention will be described in terms of a dynamo-electric machine in the form of a generator, it should be understood that the teachings are equally applicable to other electrical machines, including, but not limited to, motors. Further, at least one embodiment of the present invention will be described below with reference to a nominal size and including a set of nominal dimensions. However, it should be apparent to those skilled in the art that embodiments of the present invention are equally applicable to any suitable generator and / or machine. Furthermore, it should be apparent to those skilled in the art that embodiments of the present invention are equally applicable to various scales of nominal size and / or nominal dimensions.
    Fig. 1 shows a cross-sectional view of a conventional electric generator or a dynamo-electric machine 10, which includes a stator 12 which surrounds a rotor 14. Between the stator 12 and a retaining ring 18 or the rotor 14, a narrow radial gap 16 is present. The retaining ring 18 may be disposed about a portion of the rotor 14. In some generators, the radial gap 16 may be as narrow as about 3.8 cm (about 1.5 inches), although in various embodiments it may also be wider or narrower. The stator 12 includes an annular array of axially extending armature slots 20, all of which may be formed in the stator 12, with a stator tooth 22 formed on each side thereof.
    As shown in Figure 2, each stator tooth 22 may be formed from a plurality of stampings or laminations 23 and may be formed with a pair of axially extending grooves 24, 25 radially disposed with respect to each other. Thus, each anchor groove 20 usually has two pairs of substantially parallel grooves 24, 25 formed therein. The stator coils 26, 28, which may be partially or completely wrapped in an insulating layer 30, are disposed in each of the armature slots 20 of the stator 12. In a typical stator 12, a pair of stator coils 26, 28 are stacked in each armature groove 20, with one disposed radially on top of the other. However, in other embodiments, the stator tooth may have only a single groove.
    The stator coils 26, 28 are held by a wedge assembly 29 in the armature slots 20. In some embodiments, the wedge assembly 29 may be in the form of a stator wedge assembly, although any other type of wedge assembly may be used to retain the coils 26, 28 in the armature slots 20. As shown in Fig. 2, the wedge assembly 29 may include: a filler, e.g. an intermediate layer 32; a support wave spring 33; and a wedging element or wedge 34. Typically, one or more intermediate layers 32 are placed radially inward of the upper stator coil 26. The support wave spring 33 may be disposed in the anchor groove 20 radially inward of the intermediate layer 32. The support wave spring 33 may be made, for example, of a glass fiber roving fabric bonded to a high temperature resistant resin matrix.
    As further shown in Fig. 2, in the armature groove 20, a filling element, for example, a first lateral wave spring 36, perpendicular to the support shaft spring 33 between the upper stator coil 26 and the stator tooth 22 may be arranged. Another filling element, for example a second lateral wave spring 38, may be arranged in the armature groove 20 perpendicular to the support wave spring 33 between the lower stator coil 28 and the stator tooth 22. Optionally, one or more additional filler elements, such as first and second lateral slot fillers or spacers 40, 42, may be disposed between the side wave springs 36, 38 and the corresponding stator coils 26, 28. Alternatively, the lateral spacers 40, 42 may be placed in the anchor groove 20 between the stator tooth 22 and the stator coils 26, 28 without the side wave springs 36, 38. The side wave springs 36, 38 and the side pads 40, 42 are configured to fill any axial gap created between the stator coils 26, 28 and the stator tooth 22 and the strength between the stator coils 26, 28 and the stator tooth 22 increase in the tangential direction.
    In the anchoring groove 20, one or more wedges 34 can be installed radially within the support shaft spring 33. The wedge 34 typically has bevelled edges 44 which engage correspondingly shaped grooves 24, 25 in the sidewalls of the stator tooth 22. The wedge 34 is installed by inserting the wedge 34 into at least one of the parallel grooves 24, 25 '. The wedge 34 pushes the support shaft spring 33 against the intermediate layer 32, which in turn is pressed against the upper stator coil 26 to secure the stator coils 26, 28 in the armature groove 20 radially fixed. In another embodiment, the support wave spring 33 may be disposed between the wedge 34 and an insulated stator coil 26 without the presence of an interposer element 32.
    Over time, the support wave spring 33 may lose its elasticity such that the wedge 34 becomes loose, allowing the coils 26, 28 to vibrate. Such vibration of the coils 26, 28 may result in damage to the coils 26, 28 and failure of the coil insulation 30. In addition, released or foreign material may settle in the radial gap 16. Inspection of the wedge assembly 29 and radial gap 16 is therefore desirable to detect a need for corrective action before this occurs. For example, if foreign material is identified, it can be removed before it causes material damage.
    FIG. 3 illustrates a perspective view of a carriage 300 according to one aspect of the present invention. The carriage 300 is part of a system for inspecting a dynamoelectric machine, such as a motor or generator. The carriage 300 is adapted for insertion into the radial gap 16 provided between the rotor 14 and the stator 12 and is adapted to convey an optical device 320 along the radial gap. The optical device 320 may be a borescope, camera, or other suitable imaging or scanning device configured to acquire an image of the radial gap 16 and a portion of the rotor 14 and a portion of the stator 12. The carriage 300 is configured to be attached to a push rod 310 that is used to move the carriage 300 and the optical device 320 along the radial gap 16. The push rod may be made of a substantially non-magnetic material and may have a plurality of portions adapted to be connected together. The system is set up for entry into a single end of the dynamoelectric machine. This simplifies inspection since only one end of the machine needs to be opened to allow insertion of the carriage 300.
    The carriage 300 includes a base 302 having a central portion 304 and two end portions 306. Each end portion 306 is connected to the middle portion 304 via a flexible member 308. The middle portion 304, the end portions 306 and the flexible member 308 may be made of non-magnetic materials such as plastic, rubber or non-magnetic metals or alloys. For example, if the base body 302 is formed of plastic, the flexible elements 308 could be formed of thinner plastic sections or grooved plastic elements. The flexible members 308 allow the end portions 306 to follow the curvature of the curved surface of the stator (or rotor). Magnets 309 are disposed in each of the end portions 306, and the magnets 309 may be flush flush with, projecting from, or recessed with respect to the surface of the end portion. For example, the magnets 309 could be disposed below a surface of the end portion 306 to facilitate movement (by reducing friction) along a radially inner surface of the stator core. Several magnets 309 are shown, however, it will be understood that in each of the end portions 306, only one magnet or more than one magnet may be used.
    The carriage 300 has an attachment point 330 for the push rod 310. The attachment site may be a female threaded hole configured to engage an external thread on the end of the push rod 310. Alternatively, the push rod 310 can be inserted by means of a frictional connection in a non-threaded opening 330. One or more channels 340 are configured to operate with the optical device 320 or a picker 350. The channels 340 pass through the central portion 304 and are configured and sized to allow the optical device 320 and the extraction device 350 to slide back and forth through the channels 340.
    Figs. 4-10 illustrate perspective views of different sampling devices 350 in accordance with aspects of the present invention. FIG. 4 illustrates an alligator clip 400 that may be used to clampingly grip elements and remove objects of different shapes. To avoid damage to the dynamoelectric machine, remove any unwanted debris or fouling (FOV) from the radial gap. Fig. 5 illustrates a magnet 500 that may be used to remove foreign matter or magnetic force contamination. The magnet 500 can reach tight spaces inside to remove metal and other magnetic objects. FIG. 6 illustrates a sling 600 that may capture debris or dirt to retrieve and / or remove it. FIG. 7 illustrates a multi-gripper 700 that may be tightly depressed or depleted to remove and / or remove it. Figure 8 illustrates a fork and tine 800 that is capable of securely gripping debris or debris for removal and / or removal. FIG. 9 illustrates a multi-wire basket 900 that permits trapping of FOV to retrieve and / or remove it. FIG. 10 illustrates a wire cutter 1000 that may be used to cut wire to aid in removal and / or removal of FOD or other machine maintenance. All of the removal devices described above may either be installed together in tandem and pass through the same connection channel 340, or the optical device 320 may pass through a connection channel 340, and the extraction device 350 may pass through another connection channel 340.
    FIG. 11 illustrates a perspective view of the carriage 300 disposed in the radial gap 16 according to one aspect of the present invention. The push rod 310, the optical device 320, and the extraction device 350 have been omitted for clarity. For example only, the radial gap 16 in the radial direction may be about 0.2 inches to about 0.4 inches. Accordingly, the thickness of the carriage 300 is made smaller than the dimension of the radial gap 16. The magnets 309 may be used to hold the carriage to the stator core 23. In operation, the carriage 300 may be attached to the stator core 23 and then slid axially along the stator. The flexible members 308 allow the carriage to conform to the arc of the inner portion of the stator 12. As the carriage 300 is either pushed into or withdrawn from the stator by means of the push rod 310, the optical device 320 and / or the extraction device 350 may be used to inspect the dynamoelectric machine. One advantage is that the carriage can be inserted from a single end of the machine, thereby shortening machine disassembly and downtime. For example, the optical device may be used to detect foreign matter or material, and the sampling device may be used to remove FOV.
    Fig. 12 illustrates a perspective view of a carriage 1200 according to one aspect of the present invention. The carriage 1200 has a main body 1201, which may be slightly curved to correspond to the radially inner portion of the stator 12. The body further includes an attachment point 1230 for the push rod 310 and one or more channels 1240 configured for operation in conjunction with an optical device 1220 or a removal device 1250.The channels 1240 are sized to allow the optical device 1240 and the extraction device 1250 to slide back and forth through the channels 1240. For example, the inner diameter of the channels 1240 is sized to be slightly larger than the shaft / cable outer diameter of the optical device 1250 and the shaft / cable outer diameter of the extraction device 1250. The optical device 1220 may be a borescope, camera, or other suitable imaging device. or a scanning device configured to acquire an image of the radial gap 16 and a portion of the rotor 14 and a portion of the stator 12. The sampling device 1250 may be at least one of an alligator clip, a magnet (as shown), a loop, a multi-staple gripper, a fork and prong, a basket or a cutting tool (as illustrated, for example, in Figures 4-10). The carriage 1200 is adapted to be attached to a push rod 1210 which is used to manually move the carriage 1200 and the optical device 1220 axially along the radial gap 16. The system is adapted for entry into a single end of the dynamoelectric machine, and this simplifies inspection and maintenance since only one end of the machine needs to be opened to allow insertion of the carriage 1200.
    An elongate guide member 1260 is adapted to cooperate in the carriage of the carriage 1200. The elongate guide member may include an expandable bellows 1370 disposed at one end of the elongated guide member 1260, and the elongate guide member 1260 has a conduit adapted to supply a gas to the bellows 1370 to fill the bellows 1370 and to empty. The conduit 1265 may be disposed internally or externally with respect to the elongate guide member. For example, if the elongated guide member comprises a hollow fabric material, the central (or hollow) portion of the fabric would form the conduit used to inflate and deflate the bladder 1370. The carriage 1200 has an opening 1202 and the elongated guide member 1260 is adapted to pass through the opening 1202 so that the carriage moves forward and backward along the elongate guide member 1260. The elongated guide member 1260 may be considered a zip line in that the slide 1200 can slide back and forth along this "zip line" (or elongate guide member 1260).
    Fig. 13 illustrates a side view of the carriage 1200 disposed in the radial gap 16 according to one aspect of the present invention. The elongate guide member 1260 has been positioned in the radial gap 16 and the bellows 1370 is inflated to secure one end of the elongate guide member 1260. As the bladder 1370 inflates, it jams between the stator 12 and the rotor 14, resulting in a secure mount on one end of the elongated guide member 1260. The other end of the elongate guide member 1260 may or may not include another bellows 1370 be lashed to a secure mounting location (for example to the Endwindungen). The push rod 1210 is used to manually reciprocate the carriage 1200 axially slidably along the radial gap, and the optical device 1220 serves to view at least one of portions of the stator 12, portions of the rotor 14, and the radial gap 16 , The optical device is flexible so that it can be slid through the carriage 1200 and can view in regions near the carriage 1200 or in sections away from the carriage 1200. For example, if the carriage 1200 (and the elongate guide member 1260) are located at the top of the radial gap 16, the upper portion of the radial gap could be viewed by retracting or holding the imaging portion of the optical device near the carriage 1200. The carriage 1200 includes one or more channels 1240 configured to deflect at an angle of, for example, about 30 degrees to 90 degrees. This allows the optical device 1220 to be inserted into the radial gap 16 and extend downwardly therealong. In the above example, if the carriage is located at the top of the radial gap, the cable of the optical device may be slid into the carriage so that the imaging portion of the optical device moves circumferentially around the radial gap and at the same time downwardly. By extending and retracting the cable of the optical device, an entire side (i.e., 180 °) of the radial gap 16 can thus be inspected. It is understood that multiple optical devices and / or unloading devices could be used simultaneously in conjunction with the carriage 1200 to view, inspect, and maintain both sides of the radial gap. Together with the carriages, a plurality of elongate guide members 1200 could also be used to speed up the inspection and maintenance process. For a quick inspection, for example, three elongated guide elements, each with its own carriage, could be spaced 120 degrees apart along the radial gap.
    Fig. 14 illustrates a method for inspection and / or maintenance of a dynamoelectric machine according to one aspect of the present invention. The method 1400 includes the step 1410 of placing a carriage in the radial gap 16 of the dynamoelectric machine (e.g., a motor or generator). The placement step 1410 may include installing an elongate guide member 1260 between the stator 12 and the rotor 14 and securing at least one end of the elongate guide member by inflating a bellows 1370 that jams between the rotor and the stator. The other end of the elongated guide member may be tied to any suitable support structure, or a second bellows may be used. In this example, the elongated guide member 1260 is passed through a channel 1202 on the second carriage 1200. The placing step further includes installing an optical device 320, 1220 and / or a picker 350, 1250 through one or more channels 340, 1240 in the first carriage 300 or in the second carriage 1200. Further, a push rod 310, 1210 is attached to a push rod attachment point 330, 1230 attached.
    A navigation step 1420 includes moving the first carriage 300 or the second carriage 1200 axially along the radial gap by sliding or pulling a push rod 310, 1210. A viewing or inspection step 1430 is used to inspect the radial gap 16 for any unwanted foreign matter or debris. The image output by the optical device may be transmitted to and viewed on any suitable computer or display device. The optical device may be connected to the computer or display by any suitable conventional means (e.g., by a wired or wireless connection). The viewing step 1430 may further include extending or retracting the optical device to view different portions of the radial gap. For example, 180 degrees of the radial gap can be viewed by extending the optical device so that it moves at different axial positions about the circumference along the radial gap.
    A sampling step 1440 is used to remove and / or remove any unwanted foreign matter or contamination. The extraction device 350, 1250 may comprise a clamp, a magnet, a loop, a gripper, a fork and a prong, a basket or a cutting tool. Some non-limiting examples of sampling devices are illustrated in Figs. 4-10. For example, a portion of a broken wedge may be viewed by the optical device, grasped by the removal device, and removed by retracting the push rod from the machine. All this can be achieved by accessing only a single end of the machine, thereby avoiding the need to disassemble the machine at both ends.
    Fig. 15 illustrates in a perspective view a carriage according to an aspect of the present invention. The carriage 1500 has a central portion 1504 and two end portions 1506. Each end portion 1506 is connected to the middle portion 1504 via a flexible member 1508. The middle portion 1504, the end portions 1506 and the flexible member 1508 may be made of non-magnetic materials such as plastic, rubber or non-magnetic metals or alloys. For example, the flexible elements 1508 may be made of polypropylene or thinner plastic sections or be formed of grooved plastic elements. The flexible members 1508 allow the end portions 1506 to curve / bend corresponding to the radially inner curved surface of the stator. Magnets 1509 are disposed in each of the end portions 1506, and the magnets 1509 may be flush with, projecting from, or recessed with respect to the surface of the end portion. A removable guide block 1510 may be attached to one or both end portions 1506, and the guide block 1510 is utilized to slide along the stator slot 20 to assist in guiding the carriage 1500 as it moves axially along the radial gap 16. The carriage 1500 has an attachment point 1530 for the push rod 310. The attachment site may be an internally threaded hole adapted to be used in conjunction with an external thread on the end of the push rod 310. One or more channels 1540 are configured to operate in conjunction with the optical device 320 or the extraction device 350.
    Fig. 16 is a perspective view of a carriage according to an aspect of the present invention. The carriage 1600 has a central portion 1604 and two end portions 1606. The end portions and the middle portion may have rounded or chamfered corners to facilitate movement along the radial gap. Each end portion 1606 is connected to the middle portion 1604 via a flexible member 1608. The flexible members 1608 may be formed of polypropylene or thinner plastic sections or grooved plastic elements or any other suitable material. Magnetic guides 1610 are disposed on at least one of the end portions 1606, and the guides 1610 are used to slide along the stator slot 20 so as to aid in guiding the carriage 1600 as it moves axially along the radial gap 16. The carriage 1600 has an attachment point 1630 for the push rod 310. One or more channels 1640 are configured to operate in conjunction with the optical device 320 and / or the extraction device 350.
    Fig. 17 illustrates in a perspective view a carriage according to an aspect of the present invention. The carriage 1700 has a central portion 1704 and two end portions 1706. Each end portion 1706 is connected to the middle portion 1704 via a flexible member 1708. The middle portion 1704 and the end portions 1704 may be made of any suitable non-magnetic material, e.g. be made of plastic or polypropylene. The flexible members 1708 are made of the same or similar material, but with a thinner profile, to allow for flexibility. Magnets 1709 may be embedded in the end portions 1706. The built-in guide 1710 is used to slide along the stator slot 20 so as to aid in guiding the carriage 1700 as it moves axially along the radial gap 16. The carriage 1700 has an attachment point 1730 for the push rod 310. One or more channels 1740 are configured to operate in conjunction with the optical device 320 and / or the extraction device 350.
    Although various embodiments are described herein, it should be apparent from the description that various combinations of elements, variations or improvements thereto may be made by those skilled in the art and are within the scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Moreover, while the wedge assembly 29 has been illustrated as a stator wedge assembly, it is to be understood that other embodiments, such as a rotor wedge assembly, may be inspected without departing from the scope of the invention. Therefore, it is not intended that the invention be limited to the specific embodiment contemplated as the best mode for carrying out this invention, but that it should embrace all embodiments falling within the scope of the appended claims.
    A system for inspecting a dynamoelectric machine is provided. The dynamoelectric machine includes a rotor, a stator, and a radial gap existing between the rotor and the stator. The system includes a carriage adapted to be inserted into the radial gap between the rotor and the stator. The carriage is adapted to convey an optical device along the radial gap. The optical device obtains an image of the radial gap, a portion of the rotor and a portion of the stator. The carriage is adapted to be attached to a push rod, and the push rod is used to move the carriage and the optical device along the radial gap. The system is set up for entry into a single end of the dynamoelectric machine.
    LIST OF REFERENCE NUMBERS
    [0050]<tb> 10 <SEP> dynamoelectric machine<Tb> 12 <September> stator<Tb> 14 <September> Rotor<tb> 16 <SEP> radial gap<Tb> 18 <September> retaining ring<Tb> 20 <September> armature / stator<Tb> 22 <September> stator<Tb> 23 <September> Sheets<Tb> 24 <September> Nut<Tb> 25 <September> Nut<Tb> 26 <September> coil<Tb> 28 <September> coil<Tb> 29 <September> wedge arrangement<Tb> 30 <September> insulation layer<Tb> 32 <September> Interim Management<Tb> 33 <September> wave spring<Tb> 34 <September> wedge<tb> 36 <SEP> side wave spring<tb> 38 <SEP> side wave spring<Tb> 40 <September> Interim Management<Tb> 42 <September> Interim Management<tb> 44 <SEP> Beveled edge<Tb> 300 <September> sled<Tb> 302 <September> body<tb> 304 <SEP> middle section<Tb> 306 <September> end<tb> 308 <SEP> flexible element<Tb> 309 <September> Magnet<Tb> 310 <September> pushrod<tb> 320 <SEP> optical device<Tb> 330 <September> attachment site<Tb> 340 <September> Channels<Tb> 350 <September> removal device<Tb> 400 <September> alligator clip<Tb> 500 <September> Magnet<Tb> 600 <September> noose<Tb> 700 <September> More Krallengreifer<tb> 800 <SEP> Fork and Spike<Tb> 900 <September> More wire basket<Tb> 1000 <September> wire cutter<Tb> 1200 <September> sled<Tb> 1201 <September> body<Tb> 1210 <September> pushrod<tb> 1220 <SEP> optical device<Tb> 1230 <September> attachment site<Tb> 1240 <September> Channels<Tb> 1250 <September> removal device<tb> 1260 <SEP> elongated guide element<Tb> 1265 <September> Line<Tb> 1370 <September> bellows<Tb> 1400 <September> Process<Tb> 1410 <September> placement step<Tb> 1420 <September> Navigation Step<Tb> 1430 <September> inspection step<tb> 144 0 <SEP> Withdrawal step<Tb> 1500 <September> sled<tb> 1504 <SEP> middle section<Tb> 1506 <September> end<tb> 1508 <SEP> flexible element<Tb> 1509 <September> Magnet<Tb> 1510 <September> guide block<Tb> 1530 <September> Fixing Steep<Tb> 1540 <September> Channels<Tb> 1600 <September> Pour<tb> 1604 <SEP> middle section<Tb> 1606 <September> end<tb> 1608 <SEP> flexible element<tb> 1610 <SEP> magnetic guide<Tb> 1630 <September> Fixing Steep<Tb> 1640 <September> Channels<Tb> 1700 <September> sled<tb> 1704 <SEP> middle section<Tb> 1706 <September> end<tb> 1708 <SEP> flexible element<Tb> 1709 <September> Magnet<Tb> 1710 <September> Leadership<Tb> 1730 <September> attachment site<Tb> 1740 <September> Channels
    权利要求:
    Claims (10)
    [1]
    A system for inspecting a dynamoelectric machine, the dynamoelectric machine having a rotor, a stator and a radial gap present between the rotor and the stator, the system comprising:a carriage configured to be inserted into the radial gap between the rotor and the stator, the carriage being configured to convey an optical device along the radial gap, the optical device configured to form an image of the optical gap radial gap, a portion of the rotor and a portion of the stator, wherein the carriage is adapted to be attached to a push rod, and the push rod is used to move the carriage and the optical device along the radial gap; andthe system being adapted for entry into a single end of the dynamoelectric machine.
    [2]
    2. The system of claim 1, wherein the carriage further comprises a base body having a central portion and two end portions, each end portion is connected via a flexible member to the base body.
    [3]
    3. The system of claim 2, wherein the carriage further comprises at least one magnet disposed in each of the end portions;wherein the at least one magnet is preferably disposed below a surface of the end portion.
    [4]
    4. The system of claim 3, wherein the carriage further comprises:an attachment point for the push rod; and one or more channels configured for operation in conjunction with the optical device or a picking device, wherein the one or more channels pass through the central portion, wherein the one or more channels are configured to contact the optical device and allow the sampling device to slide through the one or more channels.
    [5]
    5. The system of claim 1, further comprising:an elongate guide member adapted to cooperate with the carriage, wherein an expandable bellows is disposed at one end of the elongate guide member, the elongate guide member having a conduit adapted to supply a gas to the bellows to move the bellows To fill and empty bellows; andwherein the carriage has an opening, wherein the elongate guide member is adapted to pass through the opening so that the carriage moves back and forth along the elongate guide member.
    [6]
    6. The system of claim 5, wherein the carriage further comprises:an attachment point for the push rod; and one or more channels configured for operation in conjunction with the optical device or a picker, the one or more channels configured to allow the optical device and the picker to pass through the one or more channels to glide;wherein at least one of the one or more channels is preferably arranged to turn at an angle, the angle being from about 30 degrees to 90 degrees.
    [7]
    The system of claim 5 or 6, wherein the elongate guide member further comprises:a hollow fabric material, wherein a central portion of the hollow fabric material forms the conduit used to fill and deflate the bladder.
    [8]
    A system according to any one of the preceding claims, wherein the optical device is a borescope and the extraction device is at least one of a staple, a magnet, a loop, a gripper, a fork and prong, a basket and / or a cutting tool.
    [9]
    9. A dynamoelectric machine inspection system, the dynamoelectric machine comprising a rotor, a stator and a radial gap present between the rotor and the stator, the system comprising:a first carriage adapted for insertion into the radial gap between the rotor and the stator, the first carriage configured to convey an optical device along the radial gap, the optical device configured to form an image of the radial gap to obtain a portion of the rotor and a portion of the stator, wherein the first carriage is adapted for attachment to a push rod and the push rod is used to move the first slide and the optical device along the radial gap;a second carriage having an aperture, an elongate guide member adapted to cooperate in conveying the second carriage, an expandable bellows being disposed at an end of the elongate guide member, the elongated guide member having a conduit adapted to to supply gas to the bladder to fill and deflate the bladder, the elongated guide member being adapted to pass through the opening so that the second carriage moves back and forth along the elongated guide member; andthe system being adapted for entry into a single end of the dynamoelectric machine.
    [10]
    A method of inspecting or maintaining a dynamoelectric machine, the method comprising the steps of:Placing a carriage in a radial gap between a rotor and a stator of the dynamoelectric machine, wherein the carriage is adapted for insertion into the radial gap, the carriage being arranged to convey an optical device along the radial gap, the optical device is arranged to obtain an image of the radial gap, wherein the carriage is adapted to be attached to a push rod, and wherein the push rod is used to move the carriage and the optical device along the radial gap;Navigating the carriage axially along the radial gap by pushing or pulling on the push rod;Inspecting the radial gap by viewing an image generated from the optical device to identify a presence of foreign matter or contamination; andRemove and remove any foreign objects or contamination identified in the inspection step.
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    同族专利:
    公开号 | 公开日
    US20160131595A1|2016-05-12|
    DE102015118274A1|2016-05-12|
    US9759667B2|2017-09-12|
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    法律状态:
    2017-03-15| NV| New agent|Representative=s name: GENERAL ELECTRIC TECHNOLOGY GMBH GLOBAL PATENT, CH |
    2019-01-15| AZW| Rejection (application)|
    优先权:
    申请号 | 申请日 | 专利标题
    US14/534,405|US9759667B2|2014-11-06|2014-11-06|Miniature air gap inspection crawler|
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