A generator phase ring handling tool, a system including the handling tool for servicing or installing one or more phase rings in a generator, and a method for servicing or installing one or more phase rings of a generator using the system.

Abstract

Generator phase ring handling tool, for servicing or installing one or more phase rings in a generator. [Solution] A generator phase ring handling tool (24), a phase ring mounting tool (26), and a base loader (28) are used to service or install one or more phase rings (20) on a generator (12). The phase rings (20) can be picked up, transported to the generator (12), inserted into the generator (12), adjusted within the generator (12), and removed. Installation, removal, and repair of rings within the generator (12) can be performed without the use of a crane, thereby reducing downtime of the generator (12). Avoiding the use of a crane for installation, removal, and repair operations improves the safety of personnel performing these operations. It also improves the accuracy of ring transportation, positioning, installation, removal, and adjustment, and minimizes the risk of damage to the rings and the generator (12).

Description

Background Art

[0001] Embodiments of the present disclosure generally relate to generators, and more specifically, to the installation and service of phase rings that surround the ends of generator stators.

Technical Field

[0002] Generators driven by turbines are generally used by power companies to generate electrical energy. Generators, such as a hydrogen or liquid cooled generator, typically include a casing that houses a stator having stator windings formed from connected stator bars. A phase ring that surrounds the stator is connected to the stator windings. A bushing that penetrates the casing is connected to the phase ring. In this way, an electrical connection is formed between the stator windings, the phase ring, and the bushing, enabling the transmission of electrical energy from the stator through the casing to the power grid.

[0003] Coolant leakage can lead to corrosion of the brazed joints at the connection between the phase ring and the stator windings. This means that if a leak is detected at any of the brazed joints, the phase ring may need to be replaced. Phase ring replacement can be performed during generator rewinds. A crane is typically used to replace a phase ring with a new one. For example, a crane can be used to remove the used phase ring from the generator, pick up the new phase ring, transport it to the generator, and position the new phase ring in a convenient location for installation inside the generator. Installing or removing phase rings using a crane is a time-consuming and cumbersome process, sometimes taking up to 20 days. Not only is installing or removing phase rings using a crane time-consuming and cumbersome, but finding a crane available to perform such work can also be a challenge for power plant operators. The uncertainty of whether a crane will be available, especially when planning with confidence that the necessary work can be completed on schedule, poses a service delivery challenge. For power plant operators, a 20-day shutdown of generators represents a very significant cost.

[0004] Other concerns associated with using cranes during phase ring installation or general maintenance work relate to the safety of workers performing such work. For example, it can be difficult for cranes to control the load associated with the phase ring. This can result in uncontrolled swaying or rotation of the phase ring, potentially creating dangerous conditions for workers installing or maintaining the phase ring. Uncontrolled swaying or rotation of the phase ring may also increase the risk of damage to the phase ring or other components of the generator due to unintentional contact by the crane.

[0005] U.S. Patent No. 7032289 discloses a stator bar handler. This handler is not suitable for handling phase rings and is only capable of axial and vertical movement.

[0006] Therefore, an approach that does not rely on the use of cranes is needed to facilitate the installation, removal, and maintenance of the phase rings used in generators. Furthermore, an approach is needed that can reduce the time required for generator maintenance without compromising worker safety. [Prior art documents] [Patent Documents]

[0007] [Patent Document 1] U.S. Patent No. 7032289 [Overview of the project]

[0008] The following provides a general description of various embodiments, some of which may or may not be covered by the claims. The purpose of this general description is to explain the purpose and function of the invention in the broadest sense and to discuss various possible modifications thereof.

[0009] Various embodiments of an electric generator phase ring handling tool avoid the need to use a crane to facilitate the installation, removal, and servicing of phase rings deployed on a generator. Furthermore, embodiments of the electric generator phase ring handling tool enable repair of the generator without removing the windings from the generator, thereby further reducing the time required for the repair of the generator. In one embodiment, the electric generator phase ring handling tool includes a base unit configured to move in a forward and backward direction. The base unit includes a front end part, a back end part, and a vertically extending part between the front end part and the back end part. In this embodiment, the tool includes a vertical support structure coupled to the base unit, the vertical support structure being configured to incline toward and away from the vertically extending part. The tool further includes a phase ring support head coupled to the vertical support structure. The phase ring support head is configured to rotate and move along a vertically extending portion of the base unit. The tool includes at least three support arms coupled to the phase ring support head, the at least three support arms configured to support the phase rings of one or more generators. Using three arms provides a more stable grip than two arms can achieve. Simultaneously, using three arms provides maximum maneuverability within the generator. More support arms, such as four, five, six, or seven, can be used with this tool to provide an even more stable grip.In this tool, the vertically extending portion is coupled to a vertical support structure by a first drive system. The first drive system is configured to tilt the vertical support structure toward and away from the vertically extending portion of the base unit.

[0010] The base unit can move in the front-to-back direction, the vertical support structure can tilt toward and away from the vertically extending portion, and the phase ring support head, together with the support arm coupled thereto, can rotate and move along the vertically extending portion. Together with the support arm coupled thereto, it provides the movement of tools in all directions necessary to install one or more phase rings and to service one or more phase rings within a generator without using a crane, while the windings remain installed within the generator.

[0011] The tool can be used with generators of any size. For example, it can be used with the largest generators, such as those with Arabelle®-class nuclear steam turbines, or with smaller generators operating on a fossil fuel boiler steam source.

[0012] In one embodiment, the first drive system may be manually operated only and / or manually powered only.

[0013] In one embodiment, the vertical support structure includes a second drive system operably coupled to a phase ring support head, the second drive system being configured to rotate the phase ring support head relative to a vertically extending portion of the base unit.

[0014] In another embodiment, the second drive system is a screw drive system and / or the second drive system is hand-operated only and / or hand-powered only.

[0015] In one embodiment, the vertical support structure includes a third drive system configured to displace a phase ring support head vertically along the vertical support structure. The third drive system may include a chain hoist assembly configured to displace a phase ring support head vertically along the vertical support structure. Furthermore, the chain hoist assembly may consist of vertically extending spaced railings positioned on the vertical support structure, a phase ring support head trolley fixed to the railings and configured to move along the vertically extending spaced railings, and a pull chain operably coupled to the phase ring support head trolley and configured to vertically translate the phase ring support head trolley along the vertically extending spaced railings. Furthermore, the phase ring support head trolley comprises spaced railings extending horizontally and oriented laterally with respect to the vertical support structure, and a screw drive system operatively coupled to the phase ring support head trolley. The screw drive system is configured to translate the phase ring support head trolley along the spaced railings extending horizontally, thereby moving the phase ring support head trolley laterally with respect to the vertical support structure.

[0016] In another embodiment, the third drive system is only hand-operated and / or only hand-powered.

[0017] In yet another embodiment, the rear end portion of the base unit includes a weight assembly to counteract the weight of the one or more generator phase rings. This particular weight arrangement is beneficial for stabilizing the tool and shifting the center of gravity toward the center of the tool.

[0018] In another embodiment, the generator phase ring handling tool further comprises a base loader for supporting a base unit on a base loader, the base loader including one, two or more rails configured to move the base unit in a longitudinal direction along the base loader, and the base loader including industrial vehicle coupling receptacles configured to receive forklift forks. Placing the tool on the base loader, which can be safely transported by forklift, facilitates the transport of the tool within the power plant. Furthermore, the availability of the tool is increased because forklifts are more readily available within the power plant than, for example, cranes. As a result, the use of the base loader and the tool together further expedites the installation or removal of one or more phase rings from the generator, or the preparation and execution of service (repair) or installation. In another embodiment, the base loader may be equipped with mounting fixtures, which can be configured to cooperate with a crane. Thus, it is also possible to transport the tool on the base loader using the crane.

[0019] A generator phase ring handling tool may further include a number of actuation tools that facilitate the movement of one or more of the components of the phase ring handling tool, including a base unit, a vertical support structure, a phase ring support head, and a number of support arms. The actuation tools may be manual and / or manually operated. For example, the base unit may be configured to cooperate with a trolley system that moves the base unit in the forward and backward directions. A screw drive system may be operably coupled to the vertical support structure and the vertically extending portion of the base unit to tilt the vertical support structure relative to the vertically extending portion of the base unit. Furthermore, the screw drive system may be operably coupled to the phase ring support head to rotate the phase ring support head relative to the vertical support structure and the vertically extending portion of the base unit. In one example, the aforementioned screw drive system may include a screw and a handwheel configured to drive a screw to translate components in the corresponding directions.

[0020] At least three support arms can be configured in one of several arrangements to facilitate the support of one or more phase rings. For example, each support arm can be spaced a predetermined distance from the other support arms. Support arms that can extend radially outward from the phase ring support head can be configured in any number of spacing arrangements to support the phase rings during pickup, transport, installation, removal, and maintenance. Furthermore, each support arm may include a gripper portion at its distal end from the phase ring support head, configured to support the phase rings. The gripper portion can support one or more phase rings from the inner side or the outer side of one or more phase rings.

[0021] In some embodiments, one support arm includes a gripper portion that supports one or more phase rings from the inside, while other, for example, two arms include gripper portions that support one or more phase rings from the outside. The particular configuration of three arms having the gripping portions defined above is beneficial in that it provides the most stable gripping of one or more phase rings when using the tool according to the present invention, without requiring an increase in the number of arms.

[0022] The phase ring handling tool described herein allows for the pickup of new phase rings, transport to the generator, and positioning for easier installation. Furthermore, the phase ring handling tool can also be used to remove used phase rings from the generator and to facilitate maintenance of phase rings installed on the generator. In all of these operations, the use of cranes can be avoided, or at least minimized. Because cranes are not required for these operations, the installation and maintenance of one or more phase rings can be performed more quickly and / or flexibly, without having to wait in line for a crane. Additionally, worker safety is improved, as the uncontrollable swaying, rotation, and slewing of phase rings, which were problematic when using cranes, no longer pose a risk to workers. Moreover, because the phase ring handling tool can accommodate a variety of movements, it allows for more precise installation, removal, and repair of phase rings than using a crane. This is further enhanced by the fact that workers can easily adjust the tool while carefully observing the position of one or more phase rings relative to other elements of the generator. As a result, using phase ring handling tools significantly minimizes the risk of damage to the phase ring and other generator components during installation and maintenance, as well as during the time required for maintenance or installation. Similar benefits are obtained when the use of cranes is minimized.

[0023] Furthermore, in the embodiment, the phase ring handling tool makes it possible to always support one or more phase rings throughout the entire maintenance or installation process. Another advantage of this tool is increased safety, as it eliminates the need for workers to manually hold one or more phase rings.

[0024] In one embodiment, the phase ring handling tool may include a base loader. The base loader may comprise a platform having an upper and lower surface, a plurality of lower beams coupled to the lower surface of the platform, one, two or more rails coupled to the upper surface of the platform, and a carriage for the phase ring handling tool configured to receive the phase ring handling tool and to travel along one or more rails with the phase ring handling tool on it. The plurality of lower beams coupled to the bottom surface of the platform support the platform and form a space between the platform and the ground.

[0025] In another embodiment, the phase ring handling tool includes at least two base loaders, at least one of which includes a platform having an upper and lower surface, and at least two bottom side beams coupled to the lower surface of the platform, the bottom beams being longer than the platform and configured to support at least one base loader on another base loader. The bottom beams in this configuration allow for the fixing of the space between the phase ring handling tool and the phase ring loading tool as described herein. This facilitates preparation and consequently speeds up the entire process of using the tool. Furthermore, the bottom beams allow the two base loaders to be stacked on top of each other and transported with the phase ring handling tool placed on top. This makes the transport of the entire unit to where the tool is needed compact, easy, and quick. Also, a smaller phase ring handling tool can be used, which further facilitates the use and transport of the tool. Using the two base loaders described herein, one base loader can be placed next to a generator and the other next to, for example, a phase ring loading tool. This allows for faster and safer service of the generator, as only the phase ring-equipped tool with one or more phase rings needs to be transported to the generator, eliminating the need to reposition the base loader.

[0026] In one embodiment, a phase ring mounting tool is disclosed that is configured to cooperate with a phase ring handling tool in the loading, transportation, and installation of one or more phase rings into a generator. It is also configured to cooperate with the removal of one or more phase rings from the generator. Thus, this embodiment relates to a system for servicing or installing one or more phase rings into a generator. The phase ring mounting tool is configured to support one or more phase rings when said one or more phase rings are oriented parallel to the ground and perpendicular to the ground. The phase ring handling tool is defined in other embodiments and is used in the system to remove the one or more phase rings from the phase ring mounting tool and facilitate the installation of the one or more phase rings in the generator. In the same or another embodiment, the phase ring handling tool facilitates the removal of one or more phase rings from the generator and positions the one or more phase rings on the phase ring mounting tool.

[0027] In one embodiment, the phase ring mounting tool can include a frame structure including a first end portion, a second end portion, and an intermediate portion between the first end portion and the second end portion. This frame structure includes spaced beams (girders) extending from the first end to the second end, first end protruding beams extending outwardly from each of the spaced beams at the first end, and second end protruding beams extending outwardly from each of the spaced beams at the second end. This frame structure can include a truss assembly in the intermediate portion to provide geometric stability to the spaced beams extending from the first end portion to the second end portion, and can include at least three arms configured to support one or more phase rings parallel to the spaced beams, and the second end portion is configured to support the phase ring mounting tool in an upright position.

[0028] In another embodiment, the phase ring mounting tool can include a first arm bracket support assembly coupled to the frame structure between the first end portion and the intermediate portion, and a second arm bracket support assembly coupled to the frame structure between the intermediate portion and the second end portion. The first arm bracket support assembly can include at least one of the arms, and the second arm bracket support assembly can include the at least two arms.

[0029] In yet another embodiment, the first arm bracket support assembly can include two arms, and the second arm bracket support assembly can include four arms. This particular arm configuration is beneficial in terms of the stability of one or more phase rings supported by the phase ring mounting tool.

[0030] The phase ring loading tool can be operated in one of several different configurations. For example, the phase ring loading tool can be configured to receive one or more phase rings while remaining in a horizontal position. In another scenario, one or more phase rings can be removed from the phase ring loading tool by tilting the phase ring handling tool from a horizontal to a vertical position. The phase ring loading tool can prepare one or more phase rings, enabling faster repair / installation. For example, the replacement of the rings can be completed within 13 days. The phase ring loading tool also has the advantage of not being affected by crane availability when replacing or installing phase rings, as it can tilt up to six phase rings at once using a crane. This loading tool allows for the attachment of phase rings from transport boxes to the phase ring loading tool without tilting the phase rings. This makes handling phase rings easier and improves worker safety. Furthermore, this tool allows for inspection of phase rings without stopping the generator, so, for example, if there is a problem with the phase rings, the problem can be detected without stopping the generator. This prevents situations where a generator shuts down simply because it is discovered that maintenance or installation cannot be completed due to compatibility issues or defects in the phase rings.

[0031] In one embodiment, a method for servicing or installing one or more phase rings in a generator is provided. This method involves the use of a system for servicing or installing one or more phase rings in a generator as disclosed herein. In particular, the system comprises a phase ring mounting tool configured to receive the one or more phase rings, as defined herein, and a phase ring handling tool for removing the one or more phase rings from the phase ring mounting tool and facilitating the installation of the one or more phase rings in the generator. The method includes assembling the one or more phase rings on the phase ring mounting tool and obtaining the one or more phase rings assembled on the phase ring mounting tool, which is in a horizontal position. This particular step allows the one or more phase rings to be assembled while the generator is still running and producing power. This is beneficial because it limits the shutdown of the generator. Furthermore, assembling in this position allows for more reliable control of the entire process of servicing or installing one or more phase rings in the generator, improving the safety of the entire process. Power shortages can be minimized because it may be possible to inspect the one or more phase rings without shutting down the generator. This is followed by a step of raising the phase ring mounting tool, along with one or more assembled phase rings, to an upright position. This particular step has the same advantages as the previous step in that it limits the time the generator is out of service for maintenance. This lifting step can be performed using any machine suitable for lifting, such as a crane. If a crane is used to lift or lower the tool, it should be noted that the crane does not need to be used for an extended period; in other words, waiting for the crane is easy. The method then includes removing one or more phase rings from the phase ring mounting tool using a phase ring handling tool. It should be noted that the generator can still generate power during this step. Finally, the method includes installing one or more generator phase rings onto the generator using a phase ring handling tool.

[0032] In some embodiments, the method may relate particularly to the maintenance of a generator. For maintenance, it is necessary to remove one or more phase rings that are already installed from the generator. The maintenance procedure may involve one or at least two phase ring handling tools. In one embodiment, after the step of raising a phase ring mounting tool to an upright position, the procedure further includes the step of removing one or more phase rings from the generator using a phase ring handling tool, before the step of removing one or more phase rings from the phase ring mounting tool using a phase ring handling tool. It should be noted that in this particular maintenance, only one phase ring handling tool is required, which is beneficial in terms of the time and effort required to transport two or more phase ring handling tools to a generator where one or more phase rings need to be serviced. In another embodiment, after the step of removing one or more phase rings from a phase ring mounting tool using a phase ring handling tool, the procedure further includes the step of removing one or more phase rings from the generator using another phase ring handling tool, before the step of installing one or more generator phase rings onto the generator using a phase ring handling tool.

[0033] In one embodiment, the maintenance or installation method involves a generator coupled with a nuclear steam source in a nuclear power plant, or a generator coupled with a fossil steam source in a fossil fuel power plant, or a generator mock-up. It should be noted that not all tools are usable for generators used in both fossil fuel and nuclear power plants. This is because some maintenance tools are limited to generators of specific sizes or configurations. The phase ring handling tools and phase ring mounting tools according to this disclosure can be used for generators of any size and configuration. In particular, the phase ring handling tools and phase ring mounting tools can be used for the largest generators combined with the largest steam turbines (Arabelle® class) and the smallest generators used in fossil fuel power plants. The tools can also be used to train operators and maintenance teams using generator mock-ups, thereby reducing the time required for the maintenance or installation of one or more phase rings and impacting the safety of maintenance or installation. Specifically, in the embodiment, the method, through team training, can reduce the likelihood of rare but significant risk events occurring from unlikely to extremely unlikely.

[0034] The phase ring handling tools, phase ring mounting tools, and base loaders described herein can also be used in systems and methods for simulating the mounting of phase rings to a generator for the purpose of training workers. This method can enhance worker safety while simultaneously improving the quality and productivity of these operations. In these embodiments, a mockup of the stator end of a generator can be provided. The stator end mockup may include a stator body having a plurality of axial slots extending radially outward from the center of the stator body configured to receive stator windings. The phase ring handling tools, phase ring mounting tools, and base loaders can be used to facilitate the mounting of one or more phase rings at the stator end of the mockup.

[0035] The term "only hand-operated" means that a particular part or tool is operated by the operator's hand. In some embodiments, it means that no mechanical and / or electronic devices are used to operate the part or tool. Embodiments of tools according to the present invention that include parts operated only by hand are beneficial because they allow for precise operation of the tool within a generator and for quick and accurate positioning of the tool. This is necessary for servicing generators with windings, and by operating the tool quickly and accurately, servicing can be done without risking damage to the windings.

[0036] The term "only hand-powered" means that a particular part or tool is powered using only the muscles of its operator. In some embodiments, this means that no mechanical device additionally powers the part or tool. Embodiments of the present invention that include only hand-powered parts are beneficial because they allow for the safe operation of tools in a generator according to the invention without the risk of damaging elements within the generator. Beneficial embodiments of the present invention incorporate parts that are powered both only by hand operation and only by hand power. This allows workers performing service or building new generators to perform their work quickly and accurately without damaging parts of the generator.

[0037] The various embodiments disclosed herein and in the claims can be combined in any order and number, and new embodiments can be created from parts of the disclosure. [Brief explanation of the drawing]

[0038] The present invention will be better understood by reading the following description of non-limiting embodiments with reference to the accompanying drawings. [Figure 1] This is a perspective view of the stator end of a generator according to one embodiment of the present invention. [Figure 2] This is a schematic diagram of a phase ring handling tool, a phase ring mounting tool, and a base loader that operate in conjunction to prepare a phase ring for mounting to a generator according to one embodiment of the present invention. [Figure 3] This is a schematic diagram of a phase ring handling tool and base loader that operate in conjunction to load a phase ring into a generator according to one embodiment of the present invention. [Figure 4] This is a schematic diagram showing a more detailed view of a phase ring-mounted tool according to one embodiment of the present invention. [Figure 5]Figure 4 is a schematic diagram showing further details of the arm bracket support assembly of a phase ring-mounted tool according to one embodiment of the present invention. [Figure 6] This is a schematic diagram showing a horizontal phase ring mounting tool configured to receive a phase ring, and is according to an embodiment of the present invention. [Figure 7] Figure 4 is a schematic diagram showing a phase ring mounting tool having a vertical phase ring configured to remove the phase ring, and is according to an embodiment of the present invention. [Figure 8] This is a schematic diagram showing how a phase ring mounting tool is tilted by a phase ring handling tool according to an embodiment of the present invention, and how the phase ring is subsequently removed from it. [Figure 9] These are schematic diagrams showing further details of the base loader depicted in Figures 2 and 3 according to embodiments of the present invention. [Figure 10] Figure 9 is a schematic diagram showing further details of the base loader depicted, without the phase ring handling tool carriage. This is according to an embodiment of the present invention. [Figure 11] Figures 9 and 10 show a schematic diagram illustrating a more detailed view of a fixed pinion rack system configured to facilitate the translation of a phase ring handling tool carriage along the rails depicted. [Figure 12] This is a schematic diagram showing a phase ring handling tool positioned to remove a phase ring from a phase ring mounting tool after being tilted vertically according to one embodiment of the present invention. [Figure 13] This is a schematic perspective view showing a phase ring handling tool according to one embodiment of the present invention. [Figure 14] Figures 14A and 14B show a side elevation and a front elevation of a phase ring handling tool according to one embodiment of the present invention, respectively. [Figure 15] A more detailed diagram of the vertically extending portion and vertical support structure of the base unit of a phase ring handling tool according to one embodiment of the present invention is shown. [Figure 16] This is a more detailed view of the phase ring support head of a phase ring handling tool according to one embodiment of the present invention. [Figure 17] This is a more detailed diagram of a vertical support structure for a phase ring handling tool with a chain hoist assembly according to one embodiment of the present invention. [Figure 18] Figures 13, 14B, and 17 show a more detailed view of the phase ring support head bracket according to one embodiment of the present invention. [Figure 19] This is a more detailed diagram of multiple support arms of a phase ring handling tool coupled to a phase ring support head according to one embodiment of the present invention. [Figure 20] Figures 20A to 20F show various spacing arrangements of multiple support arms according to embodiments of the present invention. [Figure 21] Figures 21A and 21B are more detailed views of the support arms for supporting the phase ring depicted in Figure 21C according to an embodiment of the present invention. [Figure 22] This is a schematic diagram showing a mockup of the stator end of a generator according to one embodiment of the present invention, for use with a phase ring handling tool to simulate the installation of phase rings to a generator and to train employees. [Figure 23] This is a schematic diagram showing a phase ring handling tool and base loader used with a mockup of the stator end of a generator, as depicted in Figure 22, according to one embodiment of the present invention. [Modes for carrying out the invention]

[0039] With reference to the accompanying drawings, exemplary embodiments of the present invention will be described in more detail below. However, not all embodiments are shown. The present invention can be embodied in many different forms and should not be construed as being limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure satisfies applicable legal requirements. Hereafter, similar numbers may refer to similar elements.

[0040] Referring here to the figures, Figure 1 is a perspective view of a schematic diagram of the stator end 10 of a generator, such as a generator 12. As shown in Figure 1, the generator 12 includes a casing 14 that houses a stator 16, on which stator bars, formed by stator or armature windings 18, are arranged circumferentially. A phase ring 20 surrounding the stator 16 is connected to the stator windings 18. A bushing 22 that penetrates the casing 14 and reaches the stator 16 is connected to the phase ring 20. In order to clearly illustrate the components of the generator 12 relating to the various embodiments described herein, other components that may form part of the generator 12 are not shown. For example, the generator 12 may include a rotor and rotor shaft mounted within the stator 16. The rotor may be encased in a field winding that generates a constant magnetic field that can interact with the stator windings 18, which are powered by a system of three-phase AC voltages. The electrical energy generated by the interaction between the field winding and the stator winding 18 is sent from the generator 12 to the power grid via the phase ring 20 surrounding the windings and bushings 22 that connect to the phase ring through the stator 16 and casing 14.

[0041] In some cases, the phase ring 20 may need to be serviced. Service of the phase ring 20 may include replacing the ring after coolant leakage is detected at the brazed joint where the phase ring 20 connects to the stator winding 18. The various embodiments described herein are intended for installing a new phase ring 20 after removing a used ring. In addition to being used for installing a new phase ring 20, the embodiments can be used during routine maintenance, such as during rewinding of the generator or while the winding is still installed in the generator 12. The embodiments are also useful when removing the phase ring 20 from the generator 12 after the stator winding 18 has been disconnected from the ring.

[0042] Generally, this embodiment relates to a phase ring handling tool that can be used to install, service, and remove the phase ring 20, a phase ring mounting tool that can be used to prepare the phase ring 20 for installation on the generator 12, and a base loader that facilitates the installation, removal, and service of the phase ring when used together with both the phase ring handling tool and the phase ring mounting tool. Figure 2 is a schematic diagram showing the phase ring handling tool 24, the phase ring mounting tool 26, and the base loader 28 working together in preparation for installation on the generator 12. Figure 3 is a schematic diagram of the phase ring handling tool 24 and the base loader 28 working together as part of a system for installing the phase ring 20 on the generator 12. Details of the phase ring handling tool 24, the phase ring mounting tool 26, and the base loader 28 are described below.

[0043] Figure 4 is a schematic diagram showing a more detailed view of a phase ring mounting tool 26 that can be configured to receive one or more phase rings according to one embodiment of the present invention. As shown in Figure 4, the phase ring mounting tool 26 may include a frame structure 30 having a first end portion 32, a second end portion 34, and an intermediate portion 36 between the first and second end portions. The frame structure 30 may comprise spaced beams 38 extending from the first end portion 32 to the second end portion 34. A first end projection beam 40 may extend outward from each of the spaced beams 38 of the first end portion 32, and a second end projection beam 42 may extend outward from each of the spaced beams 38 of the second end portion 34. As shown in Figure 4, the first end projection beam 40 may comprise a stabilizing brace 58 that provides stability to the beam 40. In this regard, the stabilizing brace 58 can provide greater stability to the first end portion 32 of the frame structure 30 so that the phase ring mounting tool 26 can support the weight of the phase ring 20 more effectively. Furthermore, the stabilizing brace 58 can provide stability to any phase ring 20 placed on the phase ring mounting tool 26, whether it is vertical as shown in Figures 4 and 7, or horizontal while the ring is loaded onto the tool as shown in Figure 6.

[0044] The frame structure 30 may further include a truss assembly 44 in the intermediate section 36, which can provide improved geometric stability to the spaced beams 38 extending from the first end section 32 to the second end section 34, and to the projecting beams 40 and 42 in the first end section 32 and the second end section 34. In one embodiment, the truss assembly 44 may include a first truss 46 between the first end section 32 and the intermediate section 36, and a second truss 48 between the intermediate section 36 and the second end section 34. A first arm bracket support assembly 50 may be coupled with the first truss 46, and a second arm bracket support assembly 52 may be coupled with the second truss 48. The first arm bracket support assembly 50 and the second arm bracket support assembly 52 may each include arms 54 projecting outward from the spaced beams 38. Thus, the first arm bracket support assembly 50 and the second arm bracket support assembly 52 can support one or more phase rings 20 that can be received by the phase ring mounting tool 26.

[0045] In one embodiment shown in Figure 4, the first arm bracket support assembly 50 includes two arms 54 positioned at a predetermined interval, and the second arm bracket support assembly 52 includes four arms 54 positioned at a predetermined interval, some of which are positioned at different heights. The number of arms 54 in the first arm bracket support assembly 50 and the second arm bracket support assembly 52 is not limiting. It is understood that the first arm bracket support assembly 50 and the second arm bracket support assembly 52 can be equipped with more arms 54, and possibly fewer arms. Similarly, the positioning of the arms 54 in both bracket support assemblies 50 and 52 can be varied.

[0046] Figure 5 shows further details of the arm 54 available in the arm bracket support assemblies 50, 52 of the phase ring mounting tool 26. In one embodiment, the arm 54 can be configured as an arm that can tilt to one of a plurality of positions relative to the frame structure 30. Furthermore, the arm 54 can be configured to include a locking system for locking the arm in a predetermined position to receive the phase ring 20.

[0047] The phase ring mounting tool 26 may include other components that enhance its ability to receive and support one or more phase rings for installation on a generator. For example, as shown in Figure 4, the phase ring mounting tool 26 may include support legs 56 positioned around the second end portion 34 and the intermediate portion 36 of the frame structure 30. In one embodiment, the support legs 56 are retractable relative to the spaced beams 38. Thus, the support legs 56 can extend outward from the spaced beams 38 when the phase ring mounting tool 26 is oriented vertically, as depicted in Figures 4 and 7. Alternatively, when the phase ring mounting tool 26 is oriented horizontally, which is a typical orientation for the phase ring mounting tool 26 when receiving phase rings, the support legs 56 can retract inward and become flush with the spaced beams 38.

[0048] The phase ring mounting tool 26 can be tilted from a horizontal position to a vertical position in order to move the phase ring mounting tool 26, with the phase ring 20 mounted on it, from a horizontal position to a vertical position in which the phase ring can be removed by the phase ring handling tool 24. The phase ring mounting tool 26 with the phase ring 20 mounted on it can be tilted from a horizontal position to a vertical position by one of a number of industrial machines configured to lift heavy objects. For example, in one embodiment shown in Figure 8, the phase ring mounting device 26 with the phase ring 20 mounted on it can be tilted from a horizontal position to a vertical position by a crane 59 equipped with lifting and support devices such as wire ropes, chains and sheaves.

[0049] The phase ring handling tool 24 offers several advantages. For example, in the configuration described above, the phase ring handling tool 24 can hold up to six phase rings. Furthermore, by using the phase ring handling tool 24 to preload the phase rings, workers can visually inspect the phase rings for quality issues before starting installation. In this way, if there are any problems with the phase rings, these can be addressed before installation, rather than while the generator is offline. As a result, unnecessary generator shutdowns can be avoided.

[0050] Now, let us move on to the discussion of the base loader 28, which was mentioned in relation to Figures 2 and 3. Figure 9 shows a more detailed view of the base loader 28, which, according to an embodiment of the present invention, is operable to facilitate both the loading of the phase ring 20 by the phase ring mounting tool 26 and the installation or removal of the phase ring in the generator 12 by the phase ring handling tool 24. As shown in Figure 9, the base loader 28 may include a platform 60 having a top surface 62 and a bottom surface 64. Multiple bottom beams 66 can be coupled to the bottom surface 64 of the platform 60. Multiple rails 68 can be coupled to the top surface 62 of the platform 60. The phase ring handling tool carriage 70 may be configured to receive the phase ring handling tool 24 and travel along the multiple rails 68 with the phase ring handling tool 24 mounted on it. Although not shown in Figure 9, bearings can be used in conjunction with the rails 68 to facilitate the travel of the phase ring handling tool carriage 70 and the phase ring handling tool 24 along the rails.

[0051] As shown in Figure 9, the multiple bottom beams 66 may include two beams spaced apart from each other and positioned in the middle portion of the platform 60, extending from a first end 72 to a second end 74 of the bottom surface 64 of the platform 60. The two beams 66 located in the middle portion of the platform 60 may each have ends that are perpendicular and aligned with the first and second ends 72, 74 of the bottom surface 64 of the platform 60. Figure 9 also shows that the multiple bottom beams 66 may further include two outer beams surrounding the two beams located in the middle portion of the bottom surface 64 of the platform 60. In one embodiment, the two outer beams 66 may extend from a first end 72 to a second end 74 of the bottom surface 64 of the platform 60. In this respect, one end of each outer beam 66 may extend beyond one of the first and second ends 72, 74 of the bottom surface 64 of the platform 60. This configuration allows the end of the outer beam 66 extending beyond one of the first and second ends 72, 74 of the bottom surface 64 of the platform 60 to be configured to operably engage with the phase ring mounting tool 26, while the opposing end of the outer beam 66 on the bottom surface 64 of the platform 60, or the opposite end of the bottom surface 64, can be configured to receive an industrial vehicle 76, such as a forklift as shown in Figures 2 and 3, which is operational for transporting the base loader 28 and the phase ring handling tool 24 positioned adjacent to the phase ring mounting tool 26 and the generator 12. In one embodiment, the first end 72 of the bottom surface 64 of the platform 60 can receive the industrial vehicle 76, and the second end 74 of the bottom surface 64 of the platform 60 is positioned adjacent to the phase ring mounting tool 26, facilitating the removal of the phase ring 20 mounted on it.

[0052] Figures 10 and 11 show details of a trolley system 78 used in conjunction with a base loader 28 to move a phase ring handling tool carriage 70 in the forward and backward directions. In particular, Figure 10 provides a diagram of more elements of the trolley system 78 by removing the phase ring handling tool carriage 70 from the base loader 28 depicted in Figure 9, while Figure 11 shows the trolley system 78 in more detail. In one embodiment, as shown in Figures 10 and 11, the trolley system 78 may include a fixed pinion rack system 80 configured to facilitate the translation of the phase ring handling tool carriage 70 along a rail 68. Figures 10 and 11 show that the fixed pinion rack system 80 may include a pinion 82 that operates to engage with a rack 84. When in operation, the teeth of the pinion 82 mesh with the rack 84, and the rotational motion of the pinion 82 is converted into linear motion along the rack 84. Simultaneously, when the rack 84 is driven linearly, the pinion 82 is rotationally driven. Although not shown in Figures 10 and 11, the rotation of the pinion 82 along the rack 84 can be achieved by using one of several actuators. One example of an actuator that can be used to facilitate the interaction between the pinion 82 and the rack 84 is the ratchet wrench 85 shown in Figure 12. In this regard, when positioned on the base loader 28, the phase ring handling tool carriage 70 and the phase ring handling tool 24 can be moved back and forth by pushing down the ratchet wrench and giving it motion either forward or backward.

[0053] Referring to Figures 10 and 11, in order to facilitate the use of the base loader 28 with the phase ring handling tool 24 and the phase ring loading tool 26, the base loader 28 may be configured to have a number of adjustable locking pins 86 that keep the phase ring handling tool carriage 70 locked in the rear position. This feature is beneficial during the transport and handling of the base loader 28.

[0054] The base loader 28 described with respect to Figures 9-11 is useful for both the phase ring handling tool 24 and the phase ring mounting tool 26. In one embodiment shown in Figure 12, the base loader 28 can be positioned adjacent to the vertically oriented phase ring mounting tool 26 to facilitate the removal of the phase ring 20 by the phase ring handling tool 24. For example, the base loader 28 can be positioned adjacent to the phase ring mounting tool 26 by an industrial vehicle 76 (not shown in Figure 12). The industrial vehicle 76 can then carry the phase ring handling tool 24 to the base loader 28 so that it can be positioned to travel along the rails 68 of the base loader 60. In this way, the phase ring handling tool 24 can be moved to a position close enough to remove the phase ring 20 from the phase ring mounting tool 26. Depending on the industrial vehicle 76, it may be possible to position the base loader 28 with the phase ring handling tool 24 already positioned on the rails 68 to expedite the process. In any case, the phase ring handling tool 24 can then remove the phase ring 20 from the phase ring mounting tool 26. Once the phase ring 20 is removed from the phase ring mounting tool 26, the industrial vehicle 76 can be deployed and positioned to load and install the ring onto the generator 12, as shown in Figure 3, with the base loader 28 and the phase ring mounting tool 24 loaded with the phase ring 20. In another embodiment, the base loader 28 and the phase ring handling tool 24 can be moved to a position adjacent to the generator 12 to facilitate the removal of the used phase ring from the generator.

[0055] Here, we consider the details of the components of a phase ring handling tool 24 that, when operating in conjunction with the base loader 28, removes the phase ring 20 from the phase ring mounting tool 26, facilitates the mounting of the ring to the generator 12, or facilitates the removal of a used ring from the generator. For example, Figure 13 shows a perspective view of some of the components that may form the phase ring handling tool 24, and Figures 14A and 14B show a side elevation and a front elevation of the phase ring handling tool and its components, respectively. As shown in Figures 13 and 14A, the phase ring handling tool 24 may include a base unit 88 configured to move in the front-rear direction. The base unit 88 may comprise a front end part 90, a back end part 92, and a vertical extending part 94 provided between the front end part 90 and the back end part 92 to provide stabilization between the front end part and the back end part. A vertical support structure 96 equipped with a pair of wheels 97 at its lower end can be coupled to the front end portion 90 and the vertically extending portion 94 of a base unit 88. The wheels 97, together with the base unit 88, facilitate the axial movement of the vertical support structure 96.

[0056] The phase ring handling tool 24 may further include a phase ring support head 98 coupled to a vertical support structure 96 capable of supporting a plurality of support arms 100, as shown in Figures 13, 14A, 14B, and 19. The phase ring support head 98 may be configured to move relative to the vertical support structure 96 and a vertically extending portion 94 of the base unit 88, and the plurality of support arms 100 may be configured to support one or more generator phase rings 20 during the operation of the phase ring handling tool 24.

[0057] The phase ring handling tool 24 in Figures 13, 14A, and 14B can be configured to move up to five degrees of movement to facilitate the installation and removal of phase rings in a generator. One of these movements involves the longitudinal movement of the base unit 88. As previously mentioned, the phase ring handling tool 24 can be mounted on the phase ring handling tool carriage 70 of the base loader 28. The phase ring handling tool carriage 70, with the phase ring handling tool 24 mounted on it, can move along multiple rails 68 of the base loader 28. The trolley system 78 of the base loader 28, which may include a fixed pinion rack system 80, can translate the phase ring handling tool 24 and the phase ring handling tool carriage 70 in the longitudinal direction along the rails 68 by pressing down an actuator, such as a ratchet wrench, which drives axial movement.

[0058] Another degree of movement that the phase ring handling tool 24 can perform is tilting along the horizontal axis. For example, the vertical support structure 96, the phase ring support head 98, and the multiple support arms 100 can tilt along the horizontal axis toward or toward the vertically extending portion 94 of the base unit 88 of the phase ring handling tool 24. In one embodiment, a screw drive system 102 can be operatively coupled to the vertical support structure 96 and the vertically extending portion 94 of the base unit 88 to achieve tilting motion of the vertical support structure 96, the phase ring support head 98, and the multiple support arms 100. The screw drive system 102 includes a screw 104 coupled to the vertical support structure 96 and the vertically extending portion 94 of the base unit 88, and a handwheel 106 configured to drive the screw 104 to move the vertical support structure 96 relative to the vertically extending portion 94 of the base unit 88 so that the vertical support structure 96, the phase ring support head 98, and the plurality of support arms 100 coupled to the vertical support structure 96 can be tilted relative to the vertically extending portion 94.

[0059] Figure 15 shows a more detailed view of the screw drive unit 102, including the screw 104 and the handwheel 106. As shown in Figure 15, the screw 104 is secured in place by fasteners, such as a nut and bolt assembly 110, via a screw bracket 108 extending from the back of the vertical support structure 96. The other end of the screw 104 can be attached to the vertically extending portion 94 via a screw bracket 112 extending from the back of the vertically extending portion 94, which is secured in place by fasteners, such as a nut and bolt assembly 110. During operation, turning the handwheel 106 manually causes the screw 104 to move linearly in the axial direction, resulting in the vertical support structure 96 tilting toward or away from the vertically extending portion of the base unit 88. The direction in which the handwheel 106 rotates determines whether the vertical support structure 96 moves toward or away from the front end portion 90 of the base unit 88. This tilting is advantageous for the phase ring handling tool 24 when performing operations on the phase ring 20 (such as insertion, adjustment, removal, and pickup).

[0060] Rotation of the phase ring support head 98 is another degree of mobility that the phase ring handling tool 24 can perform during the installation or removal of phase rings in a generator. For example, Figures 13, 14A, 14B, and 16 show that the phase ring handling tool 24 may include a screw drive system 114 operatively coupled to the phase ring support head 98, configured to rotate the phase ring support head 98 relative to the vertically extending portion 94 of the base unit 88 and the vertical support structure 96. Details of the screw drive system 114 are shown in Figure 16. As shown in Figure 16, the screw drive system 114 may consist of a screw 116 coupled to the phase ring support head 98 and a handwheel 118 configured to drive the screw 116 to rotate the phase ring support head 98 relative to the vertically extending portion 94 of the base unit 88 and the vertical support structure 96. In one embodiment, the screw drive system 114 may include a worm screw system with a worm gear in the form of a screw that meshes with a worm wheel. As shown in Figure 16, the back of the phase ring support head 98 may include a drive screw bracket 120 for securing the screw 116 and handwheel 118. Furthermore, the back of the phase ring support head 98 may further include a drive screw rotation bracket 122 for securing the screw 116 and handwheel 118 and facilitating the rotation of the phase ring support head 98 in accordance with the rotational translational motion provided by the handwheel 118 and screw 116. Also, Figure 16 shows that the back of the phase ring support head 98 may further include a mounting bracket 124 that can be used to secure a portion of the screw drive system 114. As shown in Figure 16, a portion of the screw 116 used to provide the rotational motion of the phase ring support head 98 may be coupled to the mounting bracket 124. Having the ability to rotate the phase ring support head 98 in this way is advantageous for the phase ring handling tool 24 when performing operations such as insertion, adjustment, removal, and pickup of the phase ring 20.

[0061] The vertical displacement of the phase ring support head 98 is another degree of movement that the phase ring handling tool 24 can perform during the operation of installing or removing the phase ring in the generator. For example, Figures 13, 14A, 14B, and 17 show that the phase ring handling tool 24 may include a chain hoist assembly 126 configured to displace the phase ring support head 98 and support arm 100 vertically relative to the vertical support structure 96. The chain hoist assembly 126 may include a pull chain 128 with at least one hook 130. As shown in Figure 17, the hook 130 may be positioned in the middle of the pull chain 128. Furthermore, another hook 130 may be used to secure the chain hoist assembly 126 to a chain hoist support bar 132 extending to the upper portion of the vertical support structure 96.

[0062] The chain hoist assembly 126 may further include vertically extending spaced railings 134 positioned on a vertical support structure 96. A phase ring support head trolley 136, which secures a phase ring support head 98 to it, is configured to move along the vertically extending spaced railings 134 together with the phase ring support head and support arm 100. The phase ring support head trolley 136 is configured to receive a mounting bracket 124 on the back side of the phase ring support head 98, as shown in Figure 16. In one embodiment, a pull chain 128 is operably coupled to the phase ring support head trolley 136. During operation, the pull chain 128 can move the phase ring support head trolley 136 vertically along the vertically extending spaced railings 134, depending on the direction in which the chain is pulled. By vertically displacing the phase ring support head trolley 136 together with the phase ring support head 98 and the support arm 100 fixed thereto, the phase ring handling tool 24 can easily perform operations on the phase ring 20, including insertion, adjustment, removal, and pickup.

[0063] The phase ring support head trolley 136 can be configured to allow the phase ring handling tool 24 to move in yet another direction. In particular, the phase ring support head trolley 136 can move the phase ring support head 98 laterally relative to the vertical support structure 96 and the vertically extending portion 94 of the base unit 88. As shown in Figures 17 and 18, the phase ring support head trolley 136 can consist of a horizontally extending spaced railing 138 oriented laterally relative to the vertical support structure 96. Figure 18 shows a screw drive system 140 operatively coupled to the phase ring support head trolley 136, configured to translate the phase ring support head trolley 136 along the horizontally extending spaced railing 138. In this regard, the screw drive system 140 can move the phase ring support head trolley 136, and thus can move the phase ring support head 98 and support arm 100 laterally relative to the vertical support structure 96 and vertically extending portion 94 of the base unit 88.

[0064] As shown in Figure 18, the screw drive system 140 may comprise a screw 142 extending through the outer portion of the phase ring support head trolley 136, and a handwheel 144 configured to drive the screw 142 to move the phase ring support head 98 laterally relative to the vertical support structure 96 and vertically extending portion 94 of the base unit 88. Figure 18, viewed from the rear end side of the phase ring support head trolley 136, shows that the phase ring support head trolley 136 can be coupled to the mounting bracket 124 on the rear side of the phase ring support head 98. During operation, manually rotating the handwheel 144 causes the drive screw 142 to give the phase ring support head trolley 136 lateral movement along the horizontally extending spaced railings 138. The lateral direction in which the phase ring support head trolley 136 moves along the railings 138 is determined by the direction of rotation of the handwheel 144. Since the phase ring support head 98 and support arm 100 are coupled to the phase ring support head trolley 136 via the mounting bracket 124, the phase ring support head 98 and support arm 100 move laterally as the trolley moves laterally. This ability to move the phase ring support head 98 and support arm 100 laterally is advantageous for the phase ring handling tool 24 when performing operations such as insertion, adjustment, removal, and pickup of the phase ring 20.

[0065] The phase ring handling tool 24 is described in conjunction with a manually powered screw drive system (102, 114, 140), but is not intended to limit the various embodiments described. The use of a manually powered screw drive system may be advantageous in that it can avoid injury to workers responsible for installing and removing phase rings from generators. Furthermore, a manually powered screw drive system minimizes the risk of damage to generator components because the worker has greater control and precision in how they operate the phase ring handling tool 24 when installing or removing phase rings from generators. Nevertheless, the phase ring handling tool 24 can also be implemented with a motor-driven screw drive system.

[0066] Furthermore, it is understood that the use of a screw drive system in the phase ring handling tool 24 is not intended to limit the various embodiments. It is intended that other types of actuators, whether mechanical or electromechanical, can be used to impart motion to the various components of the phase ring handling tool 24, including axial movement, tilting, rotation, vertical displacement, and lateral displacement. Examples of mechanical or electromechanical actuators suitable for use with the phase ring handling tool 24 to facilitate such motion include, but are not limited to, rodless actuators (e.g., belt and pulley, linear motion actuators, hydraulic actuators, pneumatic actuators).

[0067] In addition to the components described above, the phase ring handling tool 24 may include other elements that facilitate operations performed when attaching or detaching phase rings from a generator. For example, as shown in Figures 13 and 14A, the rear end portion 92 of the base unit 88 may be configured to include a weight assembly 146 to counteract the weight of any phase ring 20 supported by a plurality of support arms 100. In this regard, the weight assembly helps to stabilize the phase ring handling tool 24 when lifting or traveling with the phase ring 20. In one embodiment, the weight assembly 146 may be configured to evenly distribute the weight of the phase ring 20 around the base unit 88. Also, by providing the weight assembly 146 on the rear end portion 92 of the base unit 88, the center of gravity of the phase ring handling tool 24 will be closer to an industrial vehicle 76, such as a forklift, which can be used to transport the phase ring handling tool 24 and base loader 28 in certain embodiments, as described above.

[0068] Other components of the phase ring handling tool 24 may include an industrial vehicle coupling receptacle 148 configured to receive an industrial vehicle, which can be used to facilitate operations performed by the phase ring handling tool 24. In one embodiment, as shown in Figures 13 and 14A, a pair of industrial vehicle coupling receptacles 148 may be positioned on opposing sides of the base unit 88 of the phase ring handling tool 24. If the industrial vehicle 76 used with the phase ring handling tool 24 is a forklift, the industrial vehicle coupling receptacle 148 may be configured to receive the forks of the forklift. In this way, the forks of the forklift can be inserted into the industrial vehicle coupling receptacle 148. The forklift can then lift the phase ring handling tool 24 and move it to the desired position. Although not shown, the phase ring handling tool 24 may be equipped with a variety of fasteners, including but not limited to screws and chains, to secure the phase ring handling tool 24 while it is in motion.

[0069] Here, we consider details regarding the support arm 100, which can be deployed together with the phase ring handling tool 24. Figures 19 and 20A-20F show how the support arm 100 is positioned in relation to a phase ring support head 98 configured to receive the support arm. In one embodiment, the support arm 100, which can consist of at least three support arms, is positioned around a central position 150 of the phase ring support head 98. In one embodiment, the central position 150 can be formed by a hole drilled in the center of the phase ring support head 98. As shown in Figures 19 and 20A-20F, the multiple support arms 100 can be spaced apart from each other by a predetermined distance and extend radially outward from the central position 150 of the phase ring support head 98. A central fastener 152, such as a nut and bolt assembly, can secure the support arms 100 together at the central position 150. Corresponding peripheral fasteners 154, such as a nut and bolt assembly, can be used to secure each support arm 100 to a hole formed adjacent to the outer circumference of the phase ring support head 98. Figures 19 and 20A-20F show three support arms 100 coupled to a phase ring support head 98, but it is understood that it is also possible to deploy more than three arms.

[0070] Figures 20A-20F also show that the position of the support arm 100 on the phase ring support head 98 is variable. Generally, the position of the support arm 100 depends on the specific configuration of the phase ring. Factors to consider when determining the position of the support arm 100 include the position of the phase ring clamp connector 156 that can be used to secure the open end portion of the ring, and the position of the connection ring tang 158. As shown in Figures 20A-20F, the phase ring support head 98 may have one support arm 100 above the midline 155 intersecting the central position 150, and two support arms below the midline. It may also have two support arms below the midline (Figures 20A, 20C, 20D, 20F), and all support arms 100 below the midline (Figures 20B, 20E).

[0071] Figures 21A and 21B are more detailed views of a support arm 100 according to one embodiment of the present invention for supporting a phase ring 20 as depicted in Figure 21C. As shown in Figures 21A and 21B, the support arm 100 may include a gripper portion 160 configured to secure one or more phase rings 20 at an end 162 distal to the phase ring support head 98. This gripper portion 160 may include a planar platform 164 that abuts a platform 164 and a vertical wall 166 perpendicular to the distal end 162 of the support arm 100. A gripping material 168 can be applied to a portion of the platform 164 to provide a form of grip to the phase ring 20 placed on the platform. A notch 170 may be formed on the outer upper surface of the vertical wall 166, and a notch 172 may be formed on the outer surface of the platform 164. In this way, a strap 174 extending from the proximal end 176 of the support arm 100 can be used to extend beyond the notches 170 and 172, securing the phase ring 20 to the vertical wall 166 on the platform 164. The strap 174 can extend to the platform 164, the vertical wall 166, and the proximal end 176 of the arm 100. In one embodiment, the gripper portion 160 is adjustable to move radially relative to the phase ring support head; that is, the gripper portion 160 can extend outward or retract inward. In one embodiment, a pin 178 can be used to fix the position of the gripper portion 160 relative to the distal end 162 of the support arm 100.

[0072] The configuration of the gripper portion 160 depicted in Figures 21A and 21B is not intended to limit the various embodiments. The gripper portion is intended to take many different configurations. Those skilled in the art will understand what role the specific configuration of the phase rings supported by the support arms and the number of rings play in the design best suited for gripping.

[0073] According to one embodiment of the present invention, the aforementioned phase ring handling tool 24, phase ring mounting tool 26, and base loader 28 can be used in a method for mounting one or more phase rings to a generator. This method may include loading one or more phase rings 20 into the phase ring mounting tool 26. After tilting the phase ring mounting tool from a horizontal to a vertical direction, the phase rings 20 can be removed from the phase ring mounting tool 26 using the phase ring handling tool 24. Subsequently, one or more phase rings 20 can be installed on the generator 12 using the phase ring handling tool 24. This method may further include using the base loader 28 to facilitate the loading of the phase rings 20 into the phase ring mounting tool 26 and the installation of the rings on the generator 12. In particular, this method may include positioning the base loader 28 adjacent to the phase ring mounting tool 26 in a vertical position to facilitate the removal of the phase rings 20 from the phase ring mounting tool 26 using the phase ring handling tool 24. Furthermore, this method allows the base loader 28 to be positioned adjacent to the generator 12, and facilitates the installation of the phase ring 20 onto the generator using the phase ring handling tool 24. The installation of the phase ring 20 onto the generator 12 can be facilitated by moving the phase ring handling tool 24 up to 5 degrees.

[0074] According to another embodiment, the phase ring handling tool 24, the phase ring mounting tool 26, and the base loader 28 can be used for the purpose of training personnel in a system and method for simulating the mounting of phase rings to a generator. Figures 22 and 23 show a mockup of the stator end 180 of a generator 12, which can be used with the phase ring handling tool 24 to simulate the mounting of phase rings 20 in the generator 12 for personnel training. As shown in Figure 22, the stator end mockup 180 may include a scaled-up replica of the casing 14, the stator 16 within the casing, and the stator windings 18 distributed circumferentially at the stator end. Figure 23 shows the phase ring handling tool 24 and the base loader 28 adjacent to the stator end mockup 180, ready for workers to use to simulate mounting or removing phase rings to the mockup. In particular, the phase ring handling tool 24 can be positioned closer to the stator end mockup 180 by moving it along the base loader 28. Once the phase ring handling tool 24 is moved to the desired position, one or more workers can practice using the phase ring handling tool 24 to install the phase ring 20. In particular, workers can practice operating the phase ring handling tool 24 as it moves through any of the five aforementioned mobilitys to facilitate the installation of the phase ring 20 on the stator end mockup 180.

[0075] Practicing the installation of the phase ring 20 on the stator end mockup 180 is beneficial in that it allows workers to become proficient in installing and removing the phase ring. As a result of this practice, the quality and productivity of workers performing these tasks will improve significantly as the time spent learning and practicing the work increases. Furthermore, this training improves worker safety and minimizes the serious injuries that typically occur when installing or removing the phase ring from a generator.

[0076] From the description of the illustrated embodiments presented herein, it should be clear that this disclosure presents an effective solution for mounting phase rings to generators. It also presents a method for removing used phase rings from generators in a manner that eliminates the need to use cranes to perform these tasks. In particular, the use of phase ring handling tools, phase ring mounting tools, and base loaders avoids the aforementioned problems associated with installing, removing, and repairing phase rings using cranes. These components, as described in various embodiments, have been shown to enable the installation and removal of phase rings from generators within 13 days. This significantly reduces the time the generator is offline during the installation or removal of phase rings. Shorter generator downtime translates to greater profits for power operators. From a service perspective, there is confidence that necessary service work can be performed on a specified schedule, unlike when problems arise with the use of cranes. Furthermore, the use of phase ring handling tools, phase ring mounting tools, and base loaders for the installation, removal, and repair of phase rings eliminates the hazards of uncontrolled crane loads, improving worker safety and reducing the risk of serious injury. Furthermore, the precision and control provided by the phase ring handling tool, which accommodates a variety of movements, reduces the risk of unintended damage to the phase ring or other components of the generator. This precision and control also allows for the installation and removal of the phase ring even with the stator windings still inside the generator, thus avoiding unwanted rewinding. In addition, workers can practice and refine their skills in installing, removing, and servicing phase rings using the phase ring handling tool on stator end mockups, improving productivity, work quality, and worker safety.

[0077] The above description relating to the illustrated embodiments of this disclosure (including the contents described in the abstract) is not intended to be exhaustive or to limit the disclosed embodiments to the exact disclosed forms. While certain embodiments and examples are described herein for illustrative purposes, various modifications are possible within the scope of such embodiments and examples, as can be recognized by those familiar with the relevant art. For example, parts, components, steps, and aspects from different embodiments can be combined or adapted for use in other embodiments, even if not described in the disclosure or depicted in the drawings. Therefore, since certain modifications may be made to the invention described above without departing from the spirit and scope of the invention, all of the subject matter described above shown in the accompanying drawings should be interpreted as merely examples illustrating the concept of the invention and should not be interpreted as limiting the invention.

[0078] In this regard, although the disclosed subject matter is described in relation to various embodiments and corresponding figures, it should be understood that, where applicable, other similar embodiments may be used to perform similar, analogous, alternative, or substitute functions of the disclosed subject matter, or that modifications or additions may be made to the described embodiments. Accordingly, the disclosed subject matter should not be limited to the single embodiment described herein, but rather should be interpreted broadly and comprehensively in accordance with the appended claims below. For example, the reference to “one embodiment” herein is not intended to be construed as excluding the existence of additional embodiments incorporating the described features.

[0079] In the attached claims, the terms “including” and “in which” are used as plain English expressions for “comprising” and “wherein,” respectively. Furthermore, in the following claims, terms such as “first,” “second,” “third,” “up,” “down,” “bottom,” and “top” are used merely as labels and are not intended to impose numerical or positional requirements on the object. The terms “substantially,” “approximately,” and “about” indicate conditions within a reasonably achievable range of manufacturing and assembly tolerances compared to ideal desired conditions suitable for achieving the functional purpose of the part or assembly. Furthermore, the following limitation of claims is not written in means-plus-function form, nor is it intended to be interpreted in such form, unless such limitation of claims explicitly uses a description of a function that does not require further structure following the expression “means.”

[0080] Furthermore, the articles "a" and "an" used in this specification and the attached drawings should generally be interpreted as meaning "one or plural" unless otherwise specified or the context makes it clear that they refer to the singular form. The term "plural" should also be understood as meaning "at least one."

[0081] The information described above includes examples of systems and methods illustrating the disclosed subject matter. Of course, it is impossible to describe here every possible combination of components and methodology. Those skilled in the art will recognize that many more combinations and permutations are possible with respect to the subject matter described in the claims. Furthermore, where terms such as “including,” “having,” and “equipped with” are used in the detailed description, claims, appendices, and drawings, these terms are intended to be used in a comprehensive sense, similar to the term “consisting of” when used as a conjunction in the claims. That is, unless explicitly stated otherwise, embodiments including or having elements or elements having a particular characteristic may include additional elements that do not possess that characteristic.

[0082] This specification discloses several embodiments of the invention, including best modes, by example, and enables a person skilled in the art to practice embodiments of the invention, including the manufacture and use of any device or system, and the execution of methods incorporating them. The patentable scope of the invention is defined by the claims and may include other examples that a person skilled in the art may conceive. Such other examples are intended to be included in the claims if they have structural elements that do not differ from the language of the claims, or if they contain equivalent structural elements that do not substantially differ from the language of the claims. [Explanation of symbols]

[0083] 10: Stator end 12: Generator 14: Casing 16: Stator 18: Stator winding / armature winding 20: Phase ring 22: Bushing 24: Phase ring handling tool 26: Phase ring mounting tool 28: Base loader 30: Frame structure 32: First end section 34: Second end section 36: Intermediate section 38: Spacing beams 40: First end projection beam 42: Second end projection beam 44: Truss assembly 46: First truss 48: Second truss 50: First arm bracket support assembly 52: Second arm bracket support assembly 54: Arm 56: Support leg 58: Stabilization brace 59: Crane 60: Platform 62: Top surface 64: Bottom surface 66: Bottom beam 68: Rail 70: Phase ring handling tool carriage 72: First end 74: Second end 76: Industrial vehicle 78: Trolley system 80: Fixed pinion rack system 82: Pinion 84: Rack 85: Ratchet wrench 86: Locking pin 88: Base unit 90: Front end section 92: Rear end section 94: Vertically extending section 96: Vertical support structure 97: Wheel 98: Phase ring support head 100: Support arm 102: First drive system / screw drive system 104, 116, 142: Screw 106, 118, 144: Manual handle / handwheel 108, 112: Screw bracket 110: Nut / bolt assembly 114, 120: Drive screw bracket 122: Drive screw rotation bracket 124: Mounting bracket 126: Third drive system / chain hoist assembly 128: Pull chain 130: Hook 132: Chain hoist support bar 134: Railing 136: Phase ring support head trolley 138: Railing 140: Screw drive system 142: Drive screw 146: Weight assembly 148: Industrial vehicle coupling receiver 150: Center position 152: Center fastener 154: Outer edge fastener 155: Midline 156: Phase ring clamp connection 158: Connecting ring tongue 160: Gripper section 162: Distal end 164: Flat platform 166: Vertical wall 168: Grip material 170, 172: Notch 174: Strap 176: Proximal end 178: Pin180: Mockup

Claims

1. A phase ring handling tool (24) for an electric generator, A base unit (88) configured to move in the front-rear direction, the base unit (88) includes a front end portion (90), a rear end portion (92), and a vertically extending portion (94) between the front end portion (90) and the rear end portion (92), A vertical support structure (96) coupled to a base unit (88), wherein the vertical support structure (96) is configured to incline toward a vertically extending portion (94) and to incline away from the vertically extending portion (94), A phase ring support head (98) is coupled to a vertical support structure (96), wherein the phase ring support head (98) is configured to rotate and move along a vertically extending portion (94) of the base unit (88), At least three support arms (100) coupled to a phase ring support head (98), Includes, At least three support arms (100) are configured to support one or more generator phase rings (20), The vertically extending portion (94) is coupled to a vertical support structure (96) equipped with a first drive system (102). A first drive system (102) is configured to tilt a vertical support structure (96) toward and away from a vertically extending portion (94) of a base unit (88), and is a generator phase ring handling tool (24).

2. The generator phase ring handling tool (24) according to claim 1, wherein the first drive system (102) is a screw drive system (102).

3. The generator phase ring handling tool (24) according to claim 1, wherein the first drive system (102) is manual operation only and / or manual power only.

4. A phase ring handling tool (24) for a generator according to claim 1, wherein the vertical support structure (96) includes a second drive system (114) operably coupled to a phase ring support head (98), the second drive system (114) being a screw drive system (114) configured to rotate the phase ring support head (98) relative to a vertically extending portion (94) of a base unit (88).

5. A generator phase ring handling tool (24) according to claim 4, wherein the second drive system (114) is a screw drive system (114) and / or the second drive system (114) is manually operated only and / or the second drive system (114) is manually powered only.

6. The generator phase ring handling tool (24) according to claim 1, wherein the vertical support structure (96) includes a third drive system (126) configured to displace the phase ring support head (98) vertically along the vertical support structure (96).

7. The generator phase ring processing tool (24) according to claim 6, further comprising a third drive system (126) including a chain hoist assembly (126) configured to displace a phase ring support head (98) vertically along a vertical support structure (96).

8. A generator phase ring handling tool (24) according to claim 7, wherein the chain hoist assembly (126) is positioned on a vertical support structure (96) and includes spaced rails (134) extending vertically, a phase ring support head trolley (136) configured to fix a phase ring support head (98) and move along the spaced rails (134), and a pull chain (128) operatively coupled to the phase ring support head trolley (136) and configured to move the phase ring support head trolley (136) vertically along the spaced rails (134).

9. The generator phase ring handling tool (24) according to claim 8, wherein the phase ring support head trolley (136) includes a horizontally extending spaced rail (138) oriented laterally to a vertical support structure (96) and a screw drive system (140) operably coupled to the phase ring support head trolley (136), the screw drive system (140) being configured to move the phase ring support head trolley (136) along the horizontally extending spaced rail (138) and to move the phase ring support head trolley (136) laterally to the vertical support structure (96).

10. A generator phase ring handling tool (24) according to claim 6, wherein a third drive system (126) supplies power solely by manual operation and / or by manual power alone.

11. The generator phase ring handling tool (24) according to claim 1, wherein the rear end portion (92) of the base unit (88) includes a weight assembly (146) for resisting the weight of one or more generator phase rings (20).

12. The generator phase ring handling tool (24) further comprises at least one base loader (28) supporting a base unit (88), the base loader (28) includes one, two or more rails (68) configured to move the base unit (88) in a longitudinal direction along the one, two or more rails (68), and the base loader (28) includes an industrial vehicle coupling receiving section (148) configured to receive forklift forks, according to claim 1.

13. The generator phase ring handling tool (24) according to claim 1, comprising at least two base loaders (28), at least one base loader (28) comprising a platform (60) having a top surface (62) and a bottom surface (64), and at least two bottom beams (66) coupled to the bottom surface (64) of the platform (60), wherein the bottom beams (66) are longer than the platform (60) and configured to support at least one base loader (28) on another base loader (28).

14. A system for maintaining or installing one or more phase rings (20) in a generator (12), A phase ring mounting tool (26) configured to support one or more phase rings (20) when one or more phase rings (20) are parallel to the ground and perpendicular to the ground, A system comprising a phase ring handling tool (24) as described in any one of claims 1 to 13.

15. The phase ring-equipped tool (26) is A frame structure (30) comprising a first end portion (32), a second end portion (34), and a central portion (36) between the first end portion (32) and the second end portion (34), wherein the frame structure (30) has spaced beams (38) extending from the first end portion (32) to the second end portion (34), First end projection beams (40) extending outward from each of the spaced beams (38) at the first end portion (32), At the second end portion (34), there are second end projection beams (42) extending outward from each of the spaced beams (38), A truss assembly (44) in an intermediate section (36) that provides geometric stability to spaced beams (38) extending from a first end section (32) to a second end section (34), It includes at least three arms (54) configured to support one or more phase rings (20) parallel to spaced beams (38), The system according to claim 14, wherein the second end portion (34) is configured to support the phase ring mounting tool (26) in an upright position.

16. The phase ring mounting tool (26) further includes a first arm bracket support assembly (50) coupled to a frame structure (30) between a first end portion (32) and an intermediate portion (36), and a second arm bracket support assembly (52) coupled to the frame structure (30) between an intermediate portion (36) and a second end portion (34). The system according to claim 15, wherein the first arm bracket support assembly (50) includes at least one arm (54), and the second arm bracket support assembly (52) includes at least two arms (54).

17. The system according to claim 16, wherein the first arm bracket support assembly (50) includes two arms (54), and the second arm bracket support assembly (52) includes four arms (54).

18. The phase ring handling tool (24) includes a base loader (28), The base loader (28) is A platform (60) having an upper surface (62) and a lower surface (64), Multiple bottom beams (66) are coupled to the bottom surface (64) of the platform (60), One, two or more rails (68) are connected to the upper surface (62) of the platform (60), The system according to claim 14, comprising: a carriage for a phase ring handling tool (70) configured to receive a phase ring handling tool (24) and to travel along one or more rails (68) with the phase ring handling tool (24) placed on it.

19. A system for servicing or installing one or more phase rings (20) in a generator (12), The system includes a phase ring mounting tool (26) configured to receive one or more phase rings (20), and a phase ring handling tool (24) as described in any one of claims 1 to 12. The phase ring handling tool (24) is configured to remove one or more phase rings (20) from the phase ring mounting tool (26) and to facilitate the installation of one or more phase rings (20) onto the generator (12). The method is, The steps include: assembling one or more phase rings (20) on a phase ring mounting tool (26) in order to obtain one or more phase rings assembled on the phase ring mounting tool; When the phase ring-equipped tool (26) is in a horizontal position, The steps include raising the phase ring mounting tool (26) together with one or more assembled phase rings (20) to an upright position, The steps include removing the phase ring (20) from the phase ring mounting tool (26) using a phase ring handling tool (24), A method comprising the steps of installing one or more generator phase rings (20) on a generator (12) using a phase ring handling tool (24).

20. After the step of raising the phase ring mounting tool (26) to an upright position, and before the step of removing one or more phase rings (20) from the phase ring mounting tool (26) using the phase ring handling tool (24), the step of removing one or more phase rings (20) from the generator (12) using the phase ring handling tool (24), or After the step of removing one or more phase rings (20) from the phase ring mounting tool (26) using the phase ring handling tool (24), and before the step of installing one or more generator phase rings (20) onto the generator (12) using the phase ring handling tool (24), the step of removing one or more phase rings (20) from the generator (12) using the phase ring handling tool (24) The method according to claim 19, further comprising:

21. The generator (12) is coupled to a nuclear steam source in a nuclear power plant. The generator (12) is coupled to a fossil steam source in a fossil fuel power plant. or The method according to claim 19, wherein the generator (12) is a mockup including a stator.

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