Track system and method for inspecting and repairing turbine generator rotors on floating power generation vessels

Abstract

The present invention provides a track system and method for inspecting the rotor of a steam turbine generator on a floating power generation vessel. A track deformation joint is provided at the connection between the first end of the first inspection track and the first end of the second inspection track. The side of the first inspection track away from the second inspection track is fixedly connected to the steam engine room frame structure, and the side of the second inspection track away from the first inspection track is fixedly connected to the track bracket; the track bracket is arranged between the first boiler and the second boiler, and includes at least a first rod and a second rod parallel to each other, the first end of the first rod is fixedly connected to the first bracket on the first boiler steel frame, the first end of the second rod is fixedly connected to the second bracket on the first boiler steel frame, the second end of the first rod is slidably connected to the third bracket on the second boiler steel frame, and the second end of the second rod is slidably connected to the fourth bracket on the second boiler steel frame; the present invention optimizes the size of the steam engine room and the engine-boiler room, reduces the size of the hull, and reduces the project cost.

Description

Technical Field

[0001] The present invention relates to the technical field of floating power generation vessels, and in particular to a track system and method for inspecting and repairing a turbine generator rotor on a floating power generation vessel. Background Art

[0002] The statements in this section merely provide background art related to the present invention and do not necessarily constitute prior art.

[0003] There are usually two ways to remove the rotor of a steam turbine generator. One is to reserve space for rotor removal in the main plant, and complete the rotor removal work through the main plant crane during rotor maintenance; the other is not to reserve space for rotor removal in the main plant, reducing the size of the main plant, but there is sufficient space outside the plant, and the rotor removal work can be completed through a temporary lifting device during rotor maintenance.

[0004] The inventors found that existing large floating power generation vessels often need to provide electricity to a large area. The vessel is equipped with multiple generator sets and ancillary equipment, which leads to crowded space on board and generally cannot leave enough separate space for removing the rotor of the onboard steam turbine for maintenance. The use of temporary lifting devices for removing the rotor for maintenance requires the installation of lifting devices on the floating power generation vessel, which not only takes up space and increases the weight of the hull, but also requires the stability design of the lifting device on the hull, which greatly increases the cost. Summary of the Invention

[0005] In order to address the deficiencies of the prior art, the present invention provides a floating power generation vessel steam turbine generator rotor maintenance track system and method, which effectively utilizes the space between the two boilers to remove the rotor for maintenance, optimizes the size of the steam turbine room and the boiler room, reduces the hull size, and reduces the project cost.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A first aspect of the present invention provides a track system for inspecting and repairing a turbine generator rotor on a floating power generation vessel.

[0008] A floating power generation vessel steam turbine generator rotor maintenance track system comprises: a track support and a first maintenance track and a second maintenance track for carrying the generator rotor;

[0009] The first end of the first inspection rail is connected to the first end of the second inspection rail, and an expansion joint is provided at the connection between the first inspection rail and the second inspection rail. The side of the first inspection rail away from the second inspection rail is fixedly connected to the turbine room frame structure, and the side of the second inspection rail away from the first inspection rail is fixedly connected to the rail bracket;

[0010] The rail bracket is arranged between the first boiler and the second boiler, and includes at least a first rod and a second rod parallel to each other. The first end of the first rod is fixedly connected to the first corbel on the first boiler steel frame, the first end of the second rod is fixedly connected to the second corbel on the first boiler steel frame, the second end of the first rod is slidably connected to the third corbel on the second boiler steel frame, and the second end of the second rod is slidably connected to the fourth corbel on the second boiler steel frame.

[0011] As an optional implementation, the center lines of the first maintenance rail and the second maintenance rail are both collinear with the center line of the generator.

[0012] As an optional implementation, the first rod and the second rod are both perpendicular to the center line of the second inspection rail.

[0013] As an optional implementation, the upper flange of the first inspection rail is fixedly connected to a limiting steel plate, and the upper flange of the second inspection rail is detachably connected to a guide steel plate that cooperates with the limiting steel plate.

[0014] As an optional implementation, the first end of the first rod is fixedly welded to the first bracket on the first boiler steel frame, and the first end of the second rod is fixedly welded to the second bracket on the first boiler steel frame.

[0015] As an optional implementation, the sliding connection between the second end of the first rod and the third bracket on the second boiler steel frame includes:

[0016] The upper flange of the third bracket is welded to the first polytetrafluoroethylene plate serving as the sliding surface of the track bracket, and the lower flange of the second end of the first rod is welded to the first pad that can slide on the first polytetrafluoroethylene plate. The first pad and the lower flange of the second end of the first rod are provided with openings perpendicular to the axis direction of the second track, and the first polytetrafluoroethylene plate and the upper flange of the third bracket are provided with openings along the axis direction of the second track. After the first connecting bolt passes through the lower flange of the second end of the first rod, a rubber pad, a gasket and a nut are sequentially arranged.

[0017] As an optional implementation method, the second end of the second rod is slidably connected to the fourth bracket on the second boiler steel frame.

[0018] The upper flange of the fourth bracket is welded to a second polytetrafluoroethylene plate serving as the sliding surface of the track bracket, and the lower flange of the second end of the second rod is welded to a second pad that can slide on the second polytetrafluoroethylene plate. The second pad and the lower flange of the second end of the second rod are provided with openings perpendicular to the axis direction of the second track, and the second polytetrafluoroethylene plate and the upper flange of the fourth bracket are provided with openings along the axis direction of the second track. A second connecting bolt passes through the lower flange of the second end of the first rod and then a rubber pad, a gasket and a nut are provided in sequence.

[0019] As an optional implementation, at least one connecting rod is connected between the first rod and the second rod.

[0020] A second aspect of the present invention provides a method for repairing a turbine generator rotor of a floating power generation vessel.

[0021] A method for repairing a turbine generator rotor on a floating power generation vessel, utilizing the turbine generator rotor repair track system for a floating power generation vessel described in the first aspect of the present invention, comprises the following steps:

[0022] During normal operation of the unit, the first inspection rail and the second inspection rail are deformed freely along with their respective main structures, and the guide steel plate on the second rail is not installed at this time;

[0023] Before pulling out the rotor for generator maintenance, install the guide steel plate on the second track to control the relative position of the first maintenance track and the second maintenance track, so that when pulling out the rotor, the maintenance hoist transitions from the first maintenance track to the second maintenance track, and the generator rotor is inspected through the space between the first boiler and the second boiler.

[0024] As an optional implementation, during normal operation, the first boiler steel frame and the second boiler steel frame are deformed freely. Before the generator rotor is withdrawn, the first connecting bolt and the second connecting bolt are tightened to perform turbine generator rotor withdrawal inspection.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. The floating power generation vessel steam turbine generator rotor maintenance track system and method described in the present invention does not reserve space in the turbine room for generator rotor removal. Instead, the rotor is removed and repaired using the open space between the two boilers. This optimizes the size of the turbine room and the boiler room, reduces the size of the ship, and reduces the project cost.

[0027] 2. The floating power ship steam turbine generator rotor maintenance track system and method described in the present invention provides brackets on the two outermost steel columns of each boiler, and builds track brackets on the brackets. The track brackets are connected to the brackets of the first boiler by welding, and to the brackets of the second boiler by sliding connection, thereby ensuring the complete independence of the steel frames of the two furnaces. The sliding connection is bolted, and the connecting bolts are not tightened until the track is used, thereby ensuring stability during maintenance.

[0028] 3. The floating power generation vessel steam turbine generator rotor maintenance track system and method described in the present invention are as follows: when the unit is operating normally, the first maintenance track and the second maintenance track are freely deformed with their respective main structures. At this time, the guide steel plate on the second track is not installed, thereby not affecting the independent operation of the generator set and the boiler; before withdrawing the rotor for generator maintenance, the guide steel plate on the second track is installed to control the relative positions of the first maintenance track and the second maintenance track, so that when withdrawing the rotor, the maintenance hoist transitions from the first maintenance track to the second maintenance track, and the generator rotor is inspected through the space between the first boiler and the second boiler, further ensuring the stability of the maintenance.

[0029] Advantages of additional aspects of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0031] Figure 1 This is a schematic diagram of the boiler layout provided in Example 1 of the present invention.

[0032] Figure 2 Schematic diagram of the floating power generation vessel steam turbine generator rotor maintenance track system provided in Example 1 of the present invention.

[0033] Figure 3 Schematic diagram of the track deformation joint provided in Example 1 of the present invention.

[0034] Figure 4 This is a schematic diagram of the sliding connection provided in Example 1 of the present invention.

[0035] Figure 5 Schematic diagram of the pad and the corresponding lower flange opening of the rod provided in Example 1 of the present invention.

[0036] Figure 6 Schematic diagram of the upper flange opening of the polytetrafluoroethylene plate and the corresponding corbel provided in Example 1 of the present invention.

[0037] Figure 7 This is a schematic diagram of the opening of the rubber pad provided in Example 1 of the present invention.

[0038] Among them, 1-first boiler; 2-second boiler; 3-steam engine room; 4-steam turbine generator; 5-generator rotor extraction space; 6-first maintenance track; 7-second maintenance track; 8-track deformation joint; 9-steam engine room frame; 10-generator center line; 11-first boiler steel frame; 12-second boiler steel frame; 13-sliding connection point; 14-fixed connection point; 15-track bracket; 16-limiting steel plate; 17-guide steel plate; 18-high-strength bolt; 19-gasket; 20-rubber pad; 21-pad; 22-polytetrafluoroethylene plate; 23-connecting bolt; 24-track beam. DETAILED DESCRIPTION

[0039] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0040] It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present invention belongs.

[0041] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0042] In the present invention, terms such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "side", "bottom", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are relational words determined only for the convenience of describing the structural relationships of the various parts or elements of the present invention, and do not specifically refer to any part or element in the present invention, and should not be understood as limiting the present invention.

[0043] In the present invention, terms such as "fixed connection," "connected," and "connection" should be interpreted broadly to mean a fixed connection, an integral connection, or a detachable connection; a direct connection or an indirect connection through an intermediary. Relevant researchers or technicians in this field may determine the specific meanings of these terms in the present invention based on specific circumstances, and they should not be construed as limitations of the present invention.

[0044] In the absence of conflict, the embodiments of the present invention and the features thereof may be combined with each other.

[0045] Example 1:

[0046] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 7 As shown, embodiment 1 of the present invention provides a floating power generation vessel steam turbine generator rotor maintenance track system. The power generation vessel described in this embodiment is a gas-steam combined cycle power generation unit, which adopts a "two-to-one" multi-axis layout scheme. The gas turbine and waste heat boiler are arranged outdoors, and the steam turbine is arranged indoors. The specific schematic diagram of the first boiler 1, the second boiler 2, the steam turbine room 3, the steam turbine generator 4 and the generator rotor extraction space 5 is shown as follows Figure 1 As shown, no space for withdrawing the rotor of the steam turbine generator 4 is reserved in the turbine room 3, and the generator rotor withdrawal space 5 is constructed by utilizing the open space between the first boiler 1 and the second boiler 2 for withdrawing the rotor.

[0047] The maintenance track system includes: a track support 15 and a first maintenance track 6 and a second maintenance track 7 for carrying the generator rotor;

[0048] The first end of the first inspection rail 6 is connected to the first end of the second inspection rail 7, and a rail deformation joint 8 is provided at the connection between the first inspection rail and the second inspection rail. The side of the first inspection rail 6 away from the second inspection rail 7 is fixedly connected to the turbine room frame 9 structure, and the side of the second inspection rail away from the first inspection rail is fixedly connected to the rail bracket 15;

[0049] The rail bracket 15 is arranged between the first boiler 1 and the second boiler 2, and includes at least a first rod and a second rod parallel to each other. The first end of the first rod is fixedly connected to the first corbel on the first boiler steel frame 11 through a fixed connection point 14, the first end of the second rod is fixedly connected to the second corbel on the first boiler steel frame 11 through a fixed connection point 14, the second end of the first rod is slidably connected to the third corbel on the second boiler steel frame 12 through a sliding connection point 13, and the second end of the second rod is slidably connected to the fourth corbel sliding connection point 13 on the second boiler steel frame 12.

[0050] In this embodiment, the center lines of the first inspection rail 6 and the second inspection rail 7 are both collinear with the generator center line 10 , and the first rod and the second rod are both perpendicular to the center line of the second inspection rail 7 .

[0051] In this embodiment, the upper flange of the first inspection rail 6 is fixedly connected to the limiting steel plate 16, and the upper flange of the second inspection rail is detachably connected to the guide steel plate 17 that cooperates with the limiting steel plate 16 (high-strength bolts 18 are used to fix the guide steel plate 17 to the upper flange of the second inspection rail). A track deformation joint 8 is reserved at the connection between the first inspection rail 6 and the second inspection rail 7, and the width of the track deformation joint is δ. When the unit is operating normally, the first inspection rail 6 and the second inspection rail 7 are freely deformed with their respective main structures, and the guide steel plate 17 is not installed at this time; before pulling out the rotor during generator maintenance, the guide steel plate 17 is installed to control the relative positions of the first inspection rail 6 and the second inspection rail 7, so that the maintenance hoist can smoothly transition from the first inspection rail 6 to the second inspection rail 7 when pulling out the rotor.

[0052] In this embodiment, the first end of the first rod is welded and fixed to the first bracket on the first boiler steel frame 11, and the first end of the second rod is welded and fixed to the second bracket on the first boiler steel frame 11. It can be understood that in some other embodiments, other fixed connection methods can also be used as long as they can achieve firm fixation. Those skilled in the art can make a choice according to specific working conditions, and will not be elaborated here.

[0053] In this embodiment, the sliding connection point 13 includes a polytetrafluoroethylene plate 22 welded to the upper flange of the steel bracket, which serves as the sliding surface of the track bracket. A pad 21 is welded to the lower flange of the track bracket beam, which can slide on the polytetrafluoroethylene plate 22. After the connecting bolt 23 passes through the lower flange of the track bracket beam, a rubber pad 20, a gasket 19, a nut and other connecting accessories are sequentially installed. A longitudinal opening is set on the pad 21 and the lower flange of the track beam 24, and a transverse opening is set on the polytetrafluoroethylene plate 22 and the upper flange of the steel bracket.

[0054] Specifically, the sliding connection between the second end of the first rod and the third bracket on the second boiler steel frame includes:

[0055] The upper flange of the third bracket is welded to the first polytetrafluoroethylene plate serving as the sliding surface of the track bracket, and the lower flange of the second end of the first rod is welded to the first pad that can slide on the first polytetrafluoroethylene plate. The first pad and the lower flange of the second end of the first rod are provided with openings perpendicular to the axis direction of the second track, and the first polytetrafluoroethylene plate and the upper flange of the third bracket are provided with openings along the axis direction of the second track. After the first connecting bolt passes through the lower flange of the second end of the first rod, a rubber pad, a gasket and a nut are sequentially arranged.

[0056] Specifically, the second end of the second rod is slidably connected to the fourth bracket on the second boiler steel frame, including:

[0057] The upper flange of the fourth bracket is welded to a second polytetrafluoroethylene plate serving as the sliding surface of the track bracket, and the lower flange of the second end of the second rod is welded to a second pad that can slide on the second polytetrafluoroethylene plate. The second pad and the lower flange of the second end of the second rod are provided with openings perpendicular to the axis direction of the second track, and the second polytetrafluoroethylene plate and the upper flange of the fourth bracket are provided with openings along the axis direction of the second track. A second connecting bolt passes through the lower flange of the second end of the first rod and then a rubber pad, a gasket and a nut are provided in sequence.

[0058] In this embodiment, two parallel connecting rods are connected between the first rod and the second rod. It can be understood that in some other embodiments, more or one connecting rod can be used to achieve the stability of the track bracket 15. Those skilled in the art can make a choice based on the specific working conditions, which will not be repeated here.

[0059] Example 2:

[0060] Embodiment 2 of the present invention provides a method for repairing a turbine generator rotor on a floating power generation vessel, using the turbine generator rotor repair track system for a floating power generation vessel described in embodiment 1 of the present invention, and includes the following steps:

[0061] During normal operation of the unit, the first inspection rail and the second inspection rail are deformed freely along with their respective main structures, and the guide steel plate on the second rail is not installed at this time;

[0062] Before pulling out the rotor for generator maintenance, install the guide steel plate on the second track to control the relative position of the first maintenance track and the second maintenance track, so that when pulling out the rotor, the maintenance hoist transitions from the first maintenance track to the second maintenance track, and the generator rotor is inspected through the space between the first boiler and the second boiler.

[0063] In this embodiment, during normal operation, the first boiler steel frame and the second boiler steel frame are deformed freely. Before the generator rotor is withdrawn, the first connecting bolt and the second connecting bolt are tightened to perform turbine generator rotor withdrawal inspection.

[0064] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A floating power generation vessel steam turbine generator rotor maintenance track system, characterized by: include: a rail support and a first maintenance rail and a second maintenance rail for carrying a generator rotor; The center lines of the first inspection track and the second inspection track are collinear, and a deformation joint is provided between the first inspection track and the second inspection track. The side of the first inspection track away from the second inspection track is fixedly connected to the turbine room frame structure, and the side of the second inspection track away from the first inspection track is fixedly connected to the track bracket; The rail bracket is arranged between the first boiler and the second boiler, and includes at least a first rod and a second rod parallel to each other. The first end of the first rod is fixedly connected to the first corbel on the first boiler steel frame, the first end of the second rod is fixedly connected to the second corbel on the first boiler steel frame, the second end of the first rod is slidably connected to the third corbel on the second boiler steel frame, and the second end of the second rod is slidably connected to the fourth corbel on the second boiler steel frame.

2. The floating power generation vessel steam turbine generator rotor maintenance track system according to claim 1, characterized in that: The center lines of the first inspection track and the second inspection track are both collinear with the center line of the generator.

3. The floating power generation vessel steam turbine generator rotor maintenance track system according to claim 1, characterized in that: The first rod and the second rod are both perpendicular to the center line of the second inspection rail.

4. The floating power generation vessel steam turbine generator rotor maintenance track system according to claim 1, characterized in that: The upper flange of the first inspection rail is fixedly connected to a limiting steel plate, and the upper flange of the second inspection rail is detachably connected to a guide steel plate that cooperates with the limiting steel plate.

5. The floating power generation vessel steam turbine generator rotor maintenance track system according to claim 1, characterized in that: The first end of the first rod is welded and fixed to the first bracket on the first boiler steel frame, and the first end of the second rod is welded and fixed to the second bracket on the first boiler steel frame.

6. The floating power generation vessel steam turbine generator rotor maintenance track system according to claim 1, characterized in that: The sliding connection between the second end of the first rod and the third bracket on the second boiler steel frame includes: The upper flange of the third bracket is welded to the first polytetrafluoroethylene plate serving as the sliding surface of the track bracket, and the lower flange of the second end of the first rod is welded to the first pad that can slide on the first polytetrafluoroethylene plate. The first pad and the lower flange of the second end of the first rod are provided with openings perpendicular to the axis direction of the second track, and the first polytetrafluoroethylene plate and the upper flange of the third bracket are provided with openings along the axis direction of the second track. After the first connecting bolt passes through the lower flange of the second end of the first rod, a rubber pad, a gasket and a nut are sequentially arranged.

7. The floating power generation vessel steam turbine generator rotor maintenance track system according to claim 1, characterized in that: The second end of the second rod is slidably connected to the fourth bracket on the second boiler steel frame The upper flange of the fourth bracket is welded to a second polytetrafluoroethylene plate serving as the sliding surface of the track bracket, and the lower flange of the second end of the second rod is welded to a second pad that can slide on the second polytetrafluoroethylene plate. The second pad and the lower flange of the second end of the second rod are provided with openings perpendicular to the axis direction of the second track, and the second polytetrafluoroethylene plate and the upper flange of the fourth bracket are provided with openings along the axis direction of the second track. A second connecting bolt passes through the lower flange of the second end of the first rod and then a rubber pad, a gasket and a nut are provided in sequence.

8. The floating power generation vessel steam turbine generator rotor maintenance track system according to claim 1, characterized in that: At least one connecting rod is connected between the first rod and the second rod.

9. A method for repairing a turbine generator rotor on a floating power generation vessel, characterized in that: Utilizing the floating power generation vessel steam turbine generator rotor maintenance track system according to any one of claims 1 to 8, The following processes are included: During normal operation of the unit, the first inspection rail and the second inspection rail are deformed freely along with their respective main structures, and the guide steel plate on the second rail is not installed at this time; Before pulling out the rotor for generator maintenance, install the guide steel plate on the second track to control the relative position of the first maintenance track and the second maintenance track, so that when pulling out the rotor, the maintenance hoist transitions from the first maintenance track to the second maintenance track, and the generator rotor is inspected through the space between the first boiler and the second boiler.

10. The method for repairing a turbine generator rotor of a floating power generation vessel according to claim 9, wherein: During normal operation, the first boiler steel frame and the second boiler steel frame are deformed freely. Before the generator rotor is withdrawn, the first connecting bolt and the second connecting bolt are tightened to perform turbine generator rotor withdrawal inspection.

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