A dual shaft extension generator yaw system, method and generator

Abstract

The application discloses a double-shaft generator side shift system, method and generator, a ground base system comprises a ground base device and multiple sets of guide devices, the multiple sets of guide devices are located on the ground base device and are evenly arranged along a moving direction of the generator; a motor support system comprises a motor base and a jacking structure arranged on the motor base, and the generator is arranged on an upper end of the motor base; a motor side shift system comprises a motor jacking device and a motor translation device; the motor jacking device is used for driving the motor base to vertically ascend and descend in cooperation with the jacking structure; and the motor translation device is used for supporting the motor base and driving the motor base to move along the guide devices. The application can safely and conveniently complete the overall side shift of the motor, improves the maintenance efficiency and reduces the maintenance cost.

Description

Technical Field

[0001] This invention relates to the field of large generator set maintenance, and more particularly to a dual-shaft extension generator lateral displacement system, method, and generator. Background Technology

[0002] Currently, the QFW-85-2P generator is used in the European gas turbine waste heat boiler market, paired with a Hangzhou Gas Turbine Co., Ltd. gas turbine. Its dimensions (length × width × height) are 9255mm × 3440mm × 4730mm, and the total weight is 130T. Since the factory lacks a crane of the appropriate tonnage, a 600t truck crane is used as the lifting equipment during assembly, employing a direct, integral lifting method.

[0003] like Figure 1 As shown, this motor has a dual-shaft extension structure, where the main shaft extension of generator 1 connects to the gas turbine, and the secondary shaft extension connects to the gearbox and high-pressure cylinder, forming a bidirectional shaft system. During major overhauls, space is limited at both ends, making it impossible to extract the generator rotor from the stator from its original position 3. On-site maintenance requires moving the entire unit to maintenance platform 2. Like other large dual-shaft extension generators, this motor is limited by its weight and size, making movement difficult due to insufficient crane tonnage and limited operational space, resulting in high costs and failing to meet usage requirements. Therefore, a device and method for lifting and laterally moving dual-shaft extension generators is urgently needed to meet the overall maintenance needs of dual-shaft extension generators and reduce on-site maintenance costs for users. Summary of the Invention

[0004] The purpose of this invention is to provide a dual-shaft extension generator lateral movement system, method, and generator, which can effectively solve the problems of insufficient space and inconvenient movement during on-site maintenance of existing dual-shaft extension structure motors. It can safely and conveniently complete the overall lateral movement of the motor, improve maintenance efficiency, and reduce maintenance costs.

[0005] The present invention adopts the following technical solution: This invention provides a dual-shaft extension generator lateral movement system, including a ground base system, a motor support system, and a motor lateral movement system. The ground base system includes a foundation device and multiple sets of guide devices, which are located on the foundation device and evenly arranged along the direction of movement of the generator body. The motor support system includes a motor base and a lifting structure mounted on the motor base, with the generator body positioned on the upper end of the motor base. The motor lateral movement system includes a motor lifting device and a motor translation device. The motor lifting device is used to cooperate with the lifting structure to drive the motor base to rise and fall vertically. The motor translation device is used to support the motor base and drive the motor base to move along the guide devices.

[0006] Furthermore, the foundation device is equipped with several sets of height adjustment slots corresponding to the guide device, and height adjustment components are installed in the height adjustment slots. The height adjustment components are connected to the foundation device by bolts.

[0007] Furthermore, a foundation plate for a lateral displacement device is installed on the upper surface of the foundation device.

[0008] Furthermore, the guide device is welded to the upper end of the guide device fixing base plate, and the guide device fixing base plate is detachably connected to the side displacement device base plate.

[0009] Furthermore, multiple lifting structures are installed on the motor base and all protrude outward from the motor base.

[0010] Furthermore, a fixed bracket is installed on the foundation device at the front end of the guide device, and a lateral movement pull point is correspondingly installed on the motor base. A synchronous digital display detection device is installed between the fixed bracket and the lateral movement pull point.

[0011] Furthermore, a fixed bracket is installed on the foundation device at the front end of the guide device, and a lateral movement pull point is correspondingly installed on the motor base. A synchronous digital display drag device is installed between the fixed bracket and the lateral movement pull point.

[0012] The present invention also provides a lateral displacement method based on a lateral displacement system, comprising the following steps: A: The foundation device should be set according to the actual usage scenario; B: Set up a motor base and a lifting structure; use the motor lifting device in conjunction with the lifting structure to drive the generator body to rise vertically synchronously with the motor base, and maintain the height of the motor base unchanged after reaching the set height; C: Set up a guide device and place the motor translation device on the guide device; D: The generator body is driven to descend vertically down onto the motor translation device by the motor lifting device along with the motor base, and the generator body and motor base are supported by the motor translation device. E: Disassemble the motor lifting device, and then use the movement of the motor translation device to move the generator body along the motor base to the maintenance position.

[0013] Furthermore, the position is adjusted according to the elevation using height adjustment components, and then the foundation plate for the lateral displacement device is laid.

[0014] Furthermore, the motor base is driven to move by a motor translation device, and the moving distance and tension are detected in real time by a synchronous digital display detection device during the movement of the motor base; or the motor translation device is driven to move with the motor base by a synchronous digital display drag device, and the moving distance and tension are detected in real time by a synchronous digital display drag device during the movement of the motor base.

[0015] The present invention also provides a dual-shaft extension generator, including a generator body and a motor base, and the aforementioned lateral displacement system.

[0016] Based on the spatial structure of actual use scenarios, this invention effectively solves the problems of insufficient on-site maintenance space and crane tonnage for dual-shaft extension structure motors by combining a ground base system, a motor support system, and a motor lateral movement system. It can safely and conveniently complete the overall lateral movement of the motor, improve maintenance efficiency, and reduce maintenance costs. At the same time, it can also ensure the safety of synchronous lateral movement of the entire dual-shaft extension large-capacity generator and eliminate safety hazards. Attached Figure Description

[0017] Figure 1 This is a schematic diagram showing the location of the existing twin-shaft generator set in use and the location of the maintenance platform. Figure 2 This is a schematic diagram of the generator side-shifting system in this invention; Figure 3 This is a schematic diagram showing the distribution of the guiding device in this invention; Figure 4 This is a side view of the generator side-shifting system in this invention. Figure 5 This is a top view of the ground base system in this invention. Figure 6 This is a side view of the ground base system in this invention. Figure 7 for Figure 6 A magnified structural diagram of part A in the middle; Figure 8 This is a top view of the motor base in this invention. Figure 9 This is a side view of the motor base structure in this invention; Figure 10 This is a schematic diagram of the motor translation device in this invention. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0019] As shown in the background section, existing twin-shaft generators connect their main shaft extension to a gas turbine, while the secondary shaft extension connects to a gearbox and a high-pressure cylinder, forming a bidirectional shaft system. During major overhauls of twin-shaft generators, limited space at both ends prevents the generator rotor from being extracted from the stator in its original position. The entire unit must be moved to a maintenance platform for repair, but this is hampered by insufficient crane tonnage and limited operational space, resulting in high implementation costs and failing to meet usage requirements.

[0020] To solve the above technical problems, such as Figures 2 to 10 As shown, the present invention provides a dual-shaft extension generator lateral displacement system, including a ground base system, a generator support system, and a generator lateral displacement system; The ground base system includes a ground base 4 and multiple sets of guide devices 5, which are located on the ground base 4 and are evenly arranged along the moving direction of the generator body 1. The motor support system includes a motor base 6 and a lifting structure 7 mounted on the motor base 6; the generator body 1 is mounted on the upper end of the motor base 6. The motor side-shifting system includes a motor lifting device 8 and a motor translation device 9; the motor lifting device 8 is used to cooperate with the lifting structure 7 to drive the motor base 6 to rise and fall vertically, and the motor translation device 9 is used to support the motor base 6 and drive the motor base 6 to move along the guide device 5. In use, the present invention is as follows: First, the motor lifting device 8 is installed and, in conjunction with the lifting structure 7 on the motor base 6, drives the generator body 1 to rise vertically synchronously with the motor base 6, and maintains the height of the motor base 6 unchanged after reaching the set height; then, the motor translation device 9 is slidably mounted on the guide device 5, and the generator body 1 is driven vertically down to the motor translation device 9 along with the motor base 6 by the motor lifting device 8, with the motor translation device 9 supporting the generator body 1 and the motor base 6; after disassembling the motor lifting device 8, the generator body 1 is moved along the guide device 5 to the maintenance position along with the motor base 6 by the motor translation device 9.

[0021] In this invention, the upper surface of the foundation device 4 is a horizontal surface to stably support the motor base 6. The foundation device 4 can be a horizontal ground surface or a rectangular support box made of steel plate with a horizontal upper surface. The guide device 5 can be made of steel rails. Multiple sets of steel rails are located below the motor base 6 and are evenly arranged to ensure stable support for the motor base 6 and the generator body 1 during movement. The number of steel rails can be set according to actual usage requirements, preferably two sets. When an even set of steel rails is selected, the two sets of steel rails are located on both sides of the center of the motor base 6 and are symmetrically arranged. When an odd set of steel rails is selected, the central steel rail is located below the center of the motor base 6 and the steel rails on both sides are symmetrically arranged. In this invention, the guiding device 5 and the foundation device 4 can be assembled in the following two ways: First assembly method: The guide device 5 is directly installed on the foundation device 4, and the lower end of the motor base 6 is provided with a guide device receiving groove that is compatible with the guide device 5. The motor base 6 is placed directly on the foundation device 4, and the guide device 5 is housed in the guide device receiving groove.

[0022] The above solution can complete the overall lateral movement of the motor more safely and conveniently, avoiding the repeated disassembly of the guide device 5 during each maintenance; at the same time, it can also ensure that the motor base 6 is placed horizontally on the foundation device 4, avoiding affecting the normal operation of the generator set.

[0023] The second assembly method: The guide device 5 is detachably connected to the foundation device 4; That is, only when the generator is being moved synchronously to the side, after the motor lifting device 8 drives the motor base 6 to be raised vertically, the guide device 5 is installed above the foundation device 4; during other working hours, the guide device 5 is removed and the motor base 6 is placed directly on the foundation device 4.

[0024] The above solution can avoid the impact on daily work caused by the guide device 5 protruding from the foundation device 4, and further avoid safety hazards; at the same time, it can also ensure that the motor base 6 is placed horizontally on the foundation device 4, so as to avoid affecting the normal operation of the generator set.

[0025] In this invention, the assembly forms of the two guide devices 5 and the foundation device 4 can be selected based on the cost of use, the actual use environment and the frequency of equipment maintenance.

[0026] The following section, in conjunction with Embodiment 1, further designs the detachable connection method between the guide device 5 and the foundation device 4; Example 1: In this embodiment, the foundation device 4 is provided with several sets of height adjustment grooves 10 corresponding to the guide device 5 (rail). The height adjustment grooves 10 are provided with height adjustment components 11. The height adjustment components 11 are locked to the foundation device 4 by bolts. The upper surface of the foundation device 4 is provided with a side displacement device base plate 12 by bolts.

[0027] Considering that after multiple synchronous lateral movements of the generator using steel rails, the generator's overall weight of over 100 tons could easily cause varying degrees of collapse beneath the rails, posing a significant safety hazard, this embodiment utilizes a height adjustment component 11 to provide support at different heights. This ensures that the foundation device 4, the base plate 12 of the lateral movement device, and the steel rails remain horizontal at all times, guaranteeing the smooth completion of the synchronous lateral movement of the generator and avoiding safety hazards.

[0028] In this embodiment, the height adjustment component 11 can use a combination of different numbers of flat shims and inclined shims. By superimposing or adjusting the number or position of the flat shims and inclined shims, the height of the rail support surface can be adjusted, thereby ensuring that the foundation device 4, the foundation plate 12 of the lateral displacement device and the rail are always in a horizontal state.

[0029] In this embodiment, after the height adjustment component 11 is adjusted to the correct elevation, the foundation plate 12 of the lateral displacement device is then laid. Secondary grouting can also be performed after the motor foundation under the motor base 6 is tightened into place using anchor bolts, washers, and nuts to ensure the overall stability of the motor foundation.

[0030] When performing the overall lateral movement of the motor, the rail and the guide device fixing base plate are first welded and fixed. Then, the guide device fixing base plate is fixed to the lateral movement device foundation base plate 12 with bolts. This can achieve a reliable and stable detachable connection between the rail and the foundation device 4, and further ensure the levelness of the foundation device 4, the lateral movement device foundation base plate 12 and the rail.

[0031] In this invention, the motor base 6 can be a conventional box-type or frame-type motor base 6 made of multiple sets of steel plates; the generator body 1 is placed flat on the upper end of the motor base 6, and the assembly of the generator body 1 and the motor base 6 can also be achieved by existing conventional means, such as bolt reinforcement.

[0032] In this invention, based on the total weight of the generator body 1 and the motor base 6, and the center of gravity of the generator body 1 and the motor base 6, multiple lifting structures 7 are set on the motor base 6 to ensure that multiple sets of motor lifting devices 8 can cooperate with the corresponding multiple lifting structures 7 to safely and stably drive the motor base 6 to rise and fall vertically.

[0033] The lifting structure 7 can be a reinforced top plate, and multiple top plates can protrude outward from the motor base 6, so as to facilitate the lifting effect when the motor base 6 is in a flat state by means of the motor lifting device 8.

[0034] In this invention, the motor lateral movement system is used to realize the lifting and translation of the motor base 6; wherein, the motor lifting device 8 can be a synchronous hydraulic lift; the motor translation device 9 can be a transport tank. The setup of multiple sets of synchronous hydraulic lifts can work in conjunction with the lifting structure 7 to achieve uniform and synchronous lifting of the entire motor base 6, ensuring the safety and stability of the generator body during the lifting process and avoiding potential safety hazards.

[0035] The transport tank is a transport device that can replace traditional rollers; a single transport tank can move equipment weighing around 100 tons by its own power, and the combined use of multiple transport tanks greatly increases the range of transport weights that this invention can achieve.

[0036] Furthermore, the motor translation device 9 can also employ a transport tank vehicle with a power drive system and guiding function. This allows it to rely on its own track guidance system to provide better external installation correction, ensuring the linear motion accuracy and repeatability of the small tank as it moves along the rails under its own power system after bearing heavy loads. Ultimately, this works in conjunction with the rails to achieve precise and safe lateral motor movement, preventing derailment and other safety accidents.

[0037] The aforementioned synchronous hydraulic lift and transport tank are both conventional technologies in this field and will not be described in detail here.

[0038] In this invention, one or more sets of synchronous digital display detection devices can also be set for detecting the moving distance and tensile force; a fixed bracket 13 is set on the foundation device 4 of the front end of the guide device 5 (i.e. the end of the guide device 5 facing the maintenance platform) by fixing bolts, and a side-shifting pull point 14 is correspondingly set on the motor base 6. The two ends of the synchronous digital display detection device are connected to the fixed bracket 13 and the side-shifting pull point 14 respectively, so that the moving distance and tensile force can be detected in real time through the synchronous digital display detection device.

[0039] Similarly, in this invention, one or more sets of synchronous digital display drag devices 15 with pulling power can be provided to detect the moving distance and tension. The two ends of the synchronous digital display detection device are respectively connected to the fixed bracket 13 and the lateral pull point 14. The synchronous digital display drag device 15 can actively drive the fixed bracket 13 to move along the guide device 5 with the cooperation of the motor translation device 9. In this embodiment, two sets of synchronous digital display drag devices 15 with pulling power can be used simultaneously to achieve the pulling of the motor base 6.

[0040] Both the synchronous digital display detection device and the synchronous digital display drag device 15 are existing devices in the field and will not be described in detail here.

[0041] In this invention, the motor lateral shifting system may also include a temporary support device 16, which provides auxiliary support when the motor lifting device 8 maintains the motor base 6 at a set height; the temporary support device 16 may use one or more sets of pads to adapt to the height of the motor base 6 and provide auxiliary support.

[0042] Based on the dual-shaft generator lateral displacement system described above, the synchronous lateral displacement method for the entire dual-shaft generator of the present invention includes the following steps in sequence: A: Set the foundation device 4 in the ground base system according to the actual usage scenario; B: A motor support system including a motor base 6 and a lifting structure 7 is set up. The motor lifting device 8, in conjunction with the lifting structure 7, drives the generator body 1 to rise vertically synchronously with the motor base 6, and maintains the height of the motor base 6 unchanged after reaching the set height. C: Set up multiple sets of guide devices 5 in the ground base system, and set the motor translation device 9 on the guide device 5; D: The generator body 1 is driven by the motor lifting device 8 to descend vertically down onto the motor translation device 9 along with the motor base 6. The motor translation device 9 supports the generator body 1 and the motor base 6. E: Disassemble the motor lifting device 8, and then use the motor translation device 9 to move the generator body 1 along the motor base 6 to the maintenance position along the guide device 5.

[0043] In step A, the height adjustment component 11 is used to adjust the position according to the elevation, and then the foundation plate 12 of the lateral displacement device is laid. After the motor foundation under the motor base 6 is tightened into place using anchor bolts, washers, and nuts, secondary grouting is performed to ensure the overall stability of the motor foundation. In step B, after the motor lifting device 8 maintains the motor base 6 at the set height, the side-shifting pad is connected to the base pad of the motor base 6 by bolts; then the temporary support device 16 is used to provide auxiliary support. In step C, the guide device 5 and the guide device fixing base plate are first welded and fixed, and then the guide device fixing base plate is fixed to the side displacement device base plate 12 with bolts; then the motor translation device 9 is installed on the guide device 5. In step E, the motor lifting device 8 and the temporary support device 16 are first disassembled. Then, the motor translation device 9 is used to drive the generator body 1 to move along the motor base 6 to the maintenance position along the guide device 5. During the movement of the motor base 6, the moving distance and tension are detected in real time by the synchronous digital display detection device.

[0044] Among them, a fixed bracket 13 is installed on the foundation device 4 at the front end of the guide device 5 (i.e. the end of the guide device 5 facing the maintenance platform) by fixing bolts, and a side-shifting pull point 14 is correspondingly installed on the motor base 6. The two ends of the synchronous digital display detection device are connected to the fixed bracket 13 and the side-shifting pull point 14 respectively.

[0045] In step E, the motor lifting device 8 and the temporary support device 16 are first disassembled. Then, the synchronous digital display drive device 15 drives the motor translation device 9, so that the generator body 1 moves along the guide device 5 with the motor base 6 to the maintenance position. During the movement of the motor base 6, the moving distance and tension are detected in real time by the synchronous digital display drive device 15.

[0046] Among them, a fixed bracket 13 is installed on the foundation device 4 at the front end of the guide device 5 (i.e. the end of the guide device 5 facing the maintenance platform) by fixing bolts, and a side-shifting pull point 14 is correspondingly installed on the motor base 6. The two ends of the synchronous digital display detection device are connected to the fixed bracket 13 and the side-shifting pull point 14 respectively.

[0047] Finally, the present invention also provides a dual-shaft extension generator, including a generator body and a motor base, and also including the lateral displacement system described above. The lateral displacement system has been described in detail above and will not be repeated here.

[0048] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A dual-shaft extension generator lateral displacement system, characterized in that: It includes a ground base system, a motor support system, and a motor lateral movement system. The ground base system includes a foundation device and multiple sets of guide devices, which are located on the foundation device and evenly arranged along the direction of movement of the generator body. The motor support system includes a motor base and a lifting structure mounted on the motor base, with the generator body positioned on top of the motor base. The motor lateral movement system includes a motor lifting device and a motor translation device. The motor lifting device is used to cooperate with the lifting structure to drive the motor base to rise and fall vertically. The motor translation device is used to support the motor base and drive the motor base to move along the guide devices.

2. The dual-shaft extension generator lateral displacement system according to claim 1, characterized in that: The foundation device is equipped with several sets of height adjustment slots corresponding to the guide device, and height adjustment components are installed in the height adjustment slots.

3. The dual-shaft extension generator lateral displacement system according to claim 1, characterized in that: The foundation plate for the lateral displacement device is installed on the upper surface of the foundation device.

4. The dual-shaft extension generator lateral displacement system according to claim 3, characterized in that: The guide device is welded to the upper end of the guide device fixing base plate, and the guide device fixing base plate is detachably connected to the side displacement device foundation base plate.

5. The dual-shaft extension generator lateral displacement system according to claim 1, characterized in that: Multiple lifting structures are mounted on the motor base and all protrude outward from the motor base.

6. The dual-shaft extension generator lateral displacement system according to claim 1, characterized in that: A fixed support is installed on the foundation device at the front end of the guide device, and a lateral movement pull point is correspondingly installed on the motor base. A synchronous digital display detection device is installed between the fixed support and the lateral movement pull point.

7. The dual-shaft extension generator lateral displacement system according to claim 1, characterized in that: A fixed support is installed on the foundation device at the front end of the guide device, and a side-shifting pull point is correspondingly installed on the motor base. A synchronous digital display drag device is installed between the fixed support and the side-shifting pull point.

8. A lateral displacement method based on any one of the lateral displacement systems of claims 1 to 7, characterized in that, The steps are as follows: A: Install foundation equipment; B: Set up a motor base and a lifting structure; use the motor lifting device in conjunction with the lifting structure to drive the generator body to rise vertically synchronously with the motor base, and maintain the height of the motor base unchanged after reaching the set height; C: Set up a guide device and place the motor translation device on the guide device; D: The generator body is driven to descend vertically down onto the motor translation device by the motor lifting device along with the motor base, and the generator body and motor base are supported by the motor translation device. E: Disassemble the motor lifting device, and then use the movement of the motor translation device to move the generator body along the motor base to the maintenance position.

9. The lateral displacement method according to claim 8, characterized in that: In step A, the position is adjusted according to the elevation using the height adjustment component, and then the foundation plate of the lateral displacement device is laid.

10. The lateral displacement method according to claim 9, characterized in that: In step E, the motor base is driven to move by the motor translation device, and the moving distance and tension are detected in real time by the synchronous digital display detection device during the movement of the motor base; or the motor translation device is driven to move with the motor base by the synchronous digital display drag device, and the moving distance and tension are detected in real time by the synchronous digital display drag device during the movement of the motor base.

11. A dual-shaft extension generator, comprising a generator body and a motor base, characterized in that: It also includes the lateral movement system as described in any one of claims 1 to 7.

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