Power generator position correction device, power generator position correction system, power generator position correction method, and power generator inspection method

Abstract

A position correction device (100) provided to a power generator (1) that is raised and lowered along the vertical direction between a first position and a second position, which differ from each other in the vertical direction, by a lifting device (10), said position correction device (100) comprising: a detection device (30) that detects a horizontal position deviation amount between the power generator (1) at the first position and the power generator (1) at the second position, in a first plane (M) which is in the horizontal direction perpendicular to the vertical direction; and an adjustment device (50) that is disposed below the power generator (1) in the vertical direction independently of the ceiling and side wall of a building, that can move the power generator (1) only in a first axial direction and a second axial direction which are orthogonal to each other in the first plane (M), and that adjusts the horizontal position deviation amount.

Description

Generator position correction device, generator position correction system, generator position correction method, and generator inspection method

[0001] The present application relates to a generator position correction device, a generator position correction system, a generator position correction method, and a generator inspection method.

[0002] In one type of combined cycle power plant that drives a generator with a gas turbine and a steam turbine, the rotating shaft of the generator is connected to one end of the rotating shaft of the gas turbine and to the other end of the rotating shaft of the steam turbine. In this type of combined cycle power plant, the rotating shafts of the gas turbine, the generator, and the steam turbine are aligned on the same straight line. In such a combined cycle power plant, when inspecting the rotating shaft, rotor, etc. of the generator, the rotating shaft of the generator is removed from the generator casing and inspected using the following inspection method.

[0003] First, the generator's rotating shaft is separated from the gas turbine's rotating shaft and the steam turbine's rotating shaft. Next, one of the gas turbine and steam turbine, which are located axially of the generator, is disassembled. Next, the generator is moved upward, and the generator's rotating shaft is pulled out of the generator casing in the axial direction toward the space created by the disassembly. After that, the rotating shaft is placed in a designated location, and the shaft, rotor, etc. are inspected. This inspection method requires the generator to be moved upward once when pulling out the rotating shaft.

[0004] There are various methods for moving a generator upward, but a typical method involves placing a hydraulic jack or similar device between the generator and the foundation on which it rests and jacking up the generator. Because this method involves significant changes in the generator's posture and position, a supervisor is stationed to check for interference between the generator and surrounding equipment and for misalignment. If the jacked-up generator deviates from its intended position, the supervisor connects the generator to the building beams with a chain block or similar device and adjusts the generator's position by pulling the chain block. However, this method uses existing building beams, making it impossible to pull in any desired direction. Therefore, the generator must be moved multiple times to reach the desired position, which requires time and complicates the process. Therefore, the following moving device has been disclosed, which allows for easy position adjustment without the need for connection to vertical beams or similar devices.

[0005] That is, in the conventional moving device, the tips of bolts (21, 22) are abutted against the side wall surface of the base supporting the rotating electric machine, and the base is moved horizontally by rotating the bolts (21, 22), thereby adjusting the position of the rotating electric machine (see, for example, Patent Document 1).

[0006] JP-A-8-191558 (paragraphs

[0014] to

[0015] , FIG. 6)

[0007] However, with such a moving device, for example, when attempting to move the generator in the axial direction of the bolt (21) by rotating the bolt (21), the platform may shift in a direction other than the pushing direction of the bolt (21). When this occurs, it is necessary to repeatedly adjust the bolt until the generator is positioned at the desired position, which poses a problem of time-consuming position adjustment and increased costs. The present application discloses technology for solving the above-mentioned problem, and aims to provide a generator position correction device, a generator position correction system, a generator position correction method, and a generator inspection method that can shorten the work time and reduce costs for generator position adjustment.

[0008] The generator position correction device disclosed in the present application is a generator position correction device that is raised and lowered vertically by an elevator device between a first position and a second position that are different in the vertical direction, and includes: a detection device that detects the amount of horizontal positional deviation in a first plane that is perpendicular to the vertical direction between the generator when positioned at the first position and the generator when positioned at the second position; and an adjustment device that is arranged vertically below the generator, independently of the ceiling and side walls of the building in which the generator is stored, and is configured to move the generator only in the directions of a first axis and a second axis that are perpendicular to each other in the first plane, and that adjusts the amount of horizontal positional deviation. and a control unit that derives the horizontal position deviation amount, wherein the control unit transmits the detected horizontal position deviation amount to the adjustment device via a network when the detected horizontal position deviation amount exceeds a set threshold, and adjusts the control amounts of the first pressing unit and the second pressing unit of the adjustment device based on the horizontal position deviation amount to adjust the position of the generator so that the horizontal position deviation amount of the generator is reduced. Also, a generator position correction method disclosed in the present application comprises: a detection step of detecting the horizontal position deviation amount of the generator from the first position to the second position by the detection device, and a position adjustment step of adjusting the position of the generator so that the horizontal position deviation amount is reduced by performing each of a first movement step of moving the generator at the second position in the direction of the first axis and a second movement step of moving the generator in the direction of the second axis only once based on the detected horizontal position deviation amount.The method for inspecting a generator disclosed in the present application is a method for inspecting a generator in which a rotating machine is connected to each end of the rotating shaft of the generator, and includes: a connection / disconnection step for disconnecting the rotating machines connected to each end of the generator shaft; a lifting / lowering step for raising and lowering the generator in the vertical direction between a first position and a second position that are different in the vertical direction; a detection step and a position adjustment step in a method for correcting the position of the generator; and an inspection step for inspecting the generator after the position adjustment step.

[0009] According to the generator position correction device, generator position correction system, generator position correction method, and generator inspection method disclosed in the present application, the work time required for adjusting the generator position can be shortened, thereby reducing costs.

[0010] 1 is a side view showing a generator provided with a position correction device according to embodiment 1. FIG. 2 is a top view showing a generator provided with a position correction device according to embodiment 1. FIG. 3 is a perspective view showing a generator according to embodiment 1. FIG. 4 is a perspective view showing a partially enlarged view of a generator provided with a position correction device according to embodiment 1. FIG. 5 is a perspective view showing a partially enlarged view of a generator provided with a position correction device according to embodiment 1. FIG. 6 is a perspective view showing a schematic configuration of a horizontal position adjuster according to embodiment 1. FIG. 7 is a cross-sectional view showing a schematic configuration of a horizontal position adjuster according to embodiment 1. FIG. 8 is a flow chart showing a generator inspection method and a generator position correction method according to embodiment 1. FIG. 9 is a side view showing a generator provided with a position correction device having a control unit according to embodiment 1. FIG. 10 is a diagram showing the hardware configuration of the control unit according to embodiment 1.

[0011] Embodiment 1 Fig. 1 is a side view showing a generator 1 provided with a position correction device 100 according to embodiment 1 and jacked up from a foundation 20 in the vertical direction Z. Fig. 2 is a top view showing a generator 1 provided with a position correction device 100 according to embodiment 1 and jacked up from a foundation 20 in the vertical direction Z. Fig. 3 is a perspective view showing a generator 1 provided with a position correction device 100 according to embodiment 1 and jacked up from a foundation 20 in the vertical direction Z. The position correction device 100 is not shown in Fig. 3.

[0012] First, the configuration of the generator 1 will be described with reference to Figure 3. The generator 1 has a rotor and a rotating shaft (not shown) inside. One end of the rotating shaft is connected to the rotating shaft of a gas turbine (not shown), which is a rotating machine, and the other end is connected to the rotating shaft of a steam turbine (not shown), which is another rotating machine, to form a single-shaft combined-cycle power plant. During normal operation other than during inspection, the generator 1 is placed directly on a foundation 20 having a recess 20K recessed along the axial direction F. However, as described above, the generator 1 shown in Figure 3 is jacked up from the foundation 20 in the vertical direction Z by a lifting device (described later).

[0013] 3, the generator 1 is provided on its outer circumferential surface with cylindrical trunnions 1A as protrusions that protrude radially outward relative to the axial direction F, and columnar support portions 1B that protrude radially outward and extend along the axial direction F. A total of four trunnions 1A are provided, two on each long side of the rectangular cross section of the generator 1 that is parallel to the axial direction F. The support portions 1B are provided on the outer circumferential surface of the generator 1 so as to be located lower in the vertical direction Z than the trunnions 1A.

[0014] A hydraulic jack 10 serving as a lifting device is disposed below each trunnion 1A in the vertical direction Z. By bringing the upper end of this hydraulic jack 10 into contact with the trunnion 1A and extending or contracting the hydraulic jack 10, the generator 1 can be raised or lowered along the vertical direction Z between a first position and a second position that are different in the vertical direction Z.

[0015] When the generator 1 is jacked up from the foundation 20 by the hydraulic jack 10, its support portion 1B is supported from below in the vertical direction Z by a plurality of pedestals 21. Although not shown, when the generator 1 is in normal operation and not jacked up, its support portion 1B is placed on the upper surface 20A of the foundation 20, and the portion below the support portion 1B in the vertical direction Z is housed in the recess 20K.

[0016] Next, a description will be given of the generator position correction device 100, which is a main part of this embodiment. As shown in Figures 1 and 2, the generator position correction device 100 includes a detection device 30 that detects a position deviation of the generator 1, a horizontal position adjuster 40 as an adjustment device that corrects the horizontal position deviation by moving the generator 1 in the horizontal direction, and a display 51 as a display device. First, the detection device 30 will be described.

[0017] Fig. 4 is a perspective view of the detection device 30 detecting the position of the generator 1 which is located at a first position before being jacked up. Fig. 5 is a perspective view of the detection device 30 detecting the position of the generator 1 which is located at a second position after being jacked up. As shown in Fig. 4, the detection device 30 includes an irradiation device 31 which irradiates laser light, a target 32 ​​which serves as a light receiving surface portion which receives the laser light, and a camera 33 which serves as an imaging device which images the target 32.

[0018] The irradiation device 31 is attached to the end of the support part 1B of the generator 1 in the axial direction F, and always irradiates laser light downward in the vertical direction Z toward the foundation 20.

[0019] The target 32 ​​is provided on the base 20 below the irradiation device 31 in the vertical direction Z, and receives the laser light irradiated from the irradiation device 31. If an imaginary plane including a horizontal direction perpendicular to the vertical direction Z, i.e., the optical axis direction of the laser light, is defined as a first plane M (not shown), the target 32 ​​is configured parallel to this first plane M. The camera 33 photographs the irradiation position of the laser light on the target 32 ​​and transmits the photographed image to the display 51.

[0020] In this embodiment, an irradiation device 31 is provided at each end of the two support parts 1B in the axial direction F. A target 32 ​​and a camera 33 are provided for each irradiation device 31. In this manner, the detection devices 30 are provided at positions corresponding to the four corners of a rectangular cross section of the generator 1 parallel to the axial direction F. The display 51 displays images from the cameras 33 provided at the four corners of the generator 1.

[0021] Next, the horizontal position adjuster 40 that moves the generator 1 will be described. As shown in FIG. 1, each hydraulic jack 10 is placed on each horizontal position adjuster 40. The horizontal position adjuster 40 is attached to a support 22 installed on a foundation 20. FIG. 6 is a perspective view showing a schematic configuration of the horizontal position adjuster 40 according to the first embodiment. FIG. 7 is a cross-sectional view of the horizontal position adjuster 40 according to the first embodiment, taken along line J-J in FIG. 6. In the following description, the two axes that are orthogonal to each other within the first plane M will be referred to as the first axis direction X and the second axis direction Y, respectively. In this embodiment, the axial direction F of the generator 1 is the same as the second axis direction Y.

[0022] As shown in Figure 6, the horizontal position adjuster 40 is composed of three bases stacked in the vertical direction Z, from bottom to top in the vertical direction Z: a ​​fixed base 41 as the first base, a movable base 42 as the second base, and a movable base 43 as the third base.

[0023] The fixed base 41 has a box-like shape and includes a rectangular bottom wall 41BO parallel to the first surface M, two first axis side walls 41X that extend along the first axis direction X within the first surface M and face each other, and two second axis side walls 41Y that extend along the second axis direction Y and face each other. The fixed base 41 is fixed to the receiving base 22 so as not to move on the receiving base 22.

[0024] The movable base 42 has a box-like shape and includes a rectangular bottom wall 42BO parallel to the first surface M, two first axis side walls 42X that extend along the first axis direction X within the first surface M and face each other, and two second axis side walls 42Y that extend along the second axis direction Y and face each other. The movable base 42 is not fixed to the movable base 41.

[0025] The movable base 43 has a box-like shape and includes a rectangular bottom wall 43BO parallel to the first surface M, two first axis side walls 43X that extend along the first axis direction X within the first surface M and face each other, and two second axis side walls 43Y that extend along the second axis direction Y and face each other. The movable base 43 is not fixed to the movable base 42.

[0026] The movable base 42 is configured so that the outer surface of its first axis side wall 42X slides against the inner surface of the first axis side wall 41X of the fixed base 41, and so that the outer surface of its second axis side wall 42Y has a set first distance D1 from the inner surface of the second axis side wall 41Y of the fixed base 41.

[0027] The movable base 43 is configured so that the outer surface of its second shaft side wall 43Y comes into sliding contact with the inner surface of the second shaft side wall 42Y of the movable base 42, and so that the outer surface of its first shaft side wall 43X has a second distance D2 set from the inner surface of the first shaft side wall 42X of the movable base 42. The lower end of the hydraulic jack 10 is placed on the bottom wall 43BO of the movable base 43.

[0028] Furthermore, the horizontal position adjuster 40 includes a first pressing portion that presses the first axis side wall 43X of the movable base 43 along the second axis direction Y. In the present embodiment, the first pressing portion includes a jack bolt 45X as a first bolt that presses the first axis side wall 43X of the movable base 43, and a first screw hole 46X that is provided in the first axis side wall 42X of the movable base 42 and into which the jack bolt 45X is screwed.

[0029] The horizontal position adjuster 40 also includes a second pressing portion that presses the second axis side wall 42Y of the movable base 42 along the first axis direction X. In this embodiment, the second pressing portion includes a jack bolt 45Y as a second bolt that presses the second axis side wall 42Y of the movable base 42, and a second screw hole 46Y that is provided in the second axis side wall 41Y of the fixed base 41 and into which the jack bolt 45Y is screwed.

[0030] Here, as shown in Figure 7, low-friction sheets 47 are arranged between the fixed base 41 and the movable base 42, and between the movable base 42 and the movable base 43, as friction adjustment members that reduce the friction forces that occur between the fixed base 41 and the movable base 42, and between the movable base 42 and the movable base 43, respectively.

[0031] The configuration of the low-friction sheet 47 will be described. As shown in Fig. 7, the low-friction sheet 47 is composed of two friction sheets 48. One surface of each friction sheet 48 is a high-friction surface 48H that suppresses relative movement with the member it abuts due to frictional force, and the other surface is a sliding surface 48L that has a lower frictional force than the high-friction surface 48H and reduces the frictional force generated between the member it abuts. The low-friction sheet 47 is composed by overlapping the sliding surfaces 48L of the two friction sheets 48 so that the sliding surfaces 48L face each other.

[0032] As a result, when the hydraulic jack 10 supporting the generator 1 is placed on the bottom wall 43BO of the movable base 43, the movable base 43 and the friction sheet 48 disposed below the bottom wall 43BO of the movable base 43 do not slip or move relative to each other at the boundary BD1 due to the frictional force caused by the weight of the generator 1. Furthermore, the movable base 42 and the friction sheet 48 disposed above the bottom wall 42BO of the movable base 42 do not slip or move relative to each other at the boundary BD3 due to the frictional force caused by the weight of the generator 1.

[0033] Similarly, the movable base 42 and the friction sheet 48 disposed below the bottom wall 42BO of the movable base 42 do not slip at the boundary BD4. Furthermore, the fixed base 41 and the friction sheet 48 disposed above the bottom wall 41BO of the fixed base 41 do not slip at the boundary BD6.

[0034] In contrast, at the boundaries BD2 and BD5 where the sliding surfaces 48L of the friction sheets 48 abut against each other, the overlapping friction sheets 48 slide against each other and move relative to each other.

[0035] To move the generator 1 in the first axial direction X, the jack bolt 45Y is rotated to advance the jack bolt 45Y in the first axial direction X. As a result, the tip of the jack bolt 45Y presses the second-axis side wall 42Y of the movable base 42 in the first axial direction X. At this time, because the fixed base 41 is fixed to the foundation 20, the friction sheets 48 that abut against each other at the boundary portion BD5 move relative to each other. That is, the movable bases 42 and 43 above the boundary portion BD5 slide together in the first axial direction X, and the generator 1 moves in the first axial direction X via the hydraulic jack 10 placed on the movable base 43.

[0036] At this time, the first axis side wall 42X of the movable base 42 is in sliding contact with the first axis side wall 41X of the fixed base 41, so the movable base 42 does not move in the second axis direction Y. In this way, the first axis side wall 41X of the fixed base 41 functions as a guide to prevent the movable base 42 from moving in any direction other than the pushing direction of the jack bolt 45Y. Note that the jack bolt 45Y receives a reaction force from the movable base 42, but the female thread provided in the second screw hole 46Y of the fixed base 41 allows the jack bolt 45Y to withstand the reaction force from the movable base 42.

[0037] To move the generator 1 in the second axial direction Y, the jack bolt 45X is rotated to propel the jack bolt 45X in the second axial direction Y. This causes the tip of the jack bolt 45X to press the first shaft side wall 43X of the movable base 43 in the second axial direction Y. At this time, the friction sheets 48 abutting each other at the boundary BD2 move relative to each other, causing the movable base 43 above the boundary BD2 to slide in the second axial direction Y. In other words, the generator 1 moves in the second axial direction Y via the hydraulic jack 10 placed on the movable base 43. In this way, the second shaft side wall 42Y of the movable base 42 functions as a guide to prevent the movable base 43 from moving in any direction other than the pushing direction of the jack bolt 45X. The jack bolt 45X receives a reaction force from the movable base 43, but the female thread provided in the first screw hole 46X of the movable base 42 allows it to withstand this reaction force.

[0038] In this way, the horizontal position adjuster 40 restricts the movement direction of the generator 1 so that it does not move in any direction other than the pushing direction of the jack bolt, thereby preventing the generator 1 from moving in an unintended direction.

[0039] Although the above describes one example of the configuration of the horizontal position adjuster 40, other configurations may be used as long as they are movable only in the first axial direction X and the second axial direction Y. Furthermore, while jack bolts are described as tools for pressing the movable bases 42, 43, the present invention is not limited to this configuration as long as the movable bases 42, 43 can be moved in the first axial direction X and the second axial direction Y. Furthermore, the vertical thickness of the friction sheets 48 is determined according to the weight of the generator 1, and therefore, even when a heavy generator 1 is placed on the friction sheets 48, the friction sheets 48 can be smoothly moved relative to each other.

[0040] An inspection method for inspecting the generator 1 and a method for correcting the position of the generator 1 using the generator position correction device 100 configured as described above will now be described.

[0041] 8 is a flow chart showing the inspection method of the generator 1 according to this embodiment and the position correction method during inspection of the generator 1. As mentioned above, although not shown, during normal operation other than inspection, the generator 1 has its support portion 1B placed on the upper surface 20A of the foundation 20. Here, the position of the generator 1 before it is raised and lowered in the vertical direction Z, that is, before it is jacked up in the following description, is referred to as the first position.

[0042] First, when jacking up the generator 1 from the first position, the worker removes any obstructions that may hinder the jacking up (obstacle removal step S1). Although not shown, obstructions during movement include the connection between the main terminal and external terminal of the generator 1, or various components located around the connection, the connection between the rotating shafts of the gas turbine and steam turbine, which are rotary machines, and the generator 1, or various components located around the connection, etc.

[0043] Next, the worker disconnects the rotating shaft of the gas turbine from the rotating shaft of the generator 1, and also disconnects the rotating shaft of the generator 1 from the rotating shaft of the steam turbine (connection / disconnection step S2). In this connection / disconnection step S2, for example, connecting bolts or the like at the coupling portion that connects the rotating shafts to each other are removed.

[0044] Next, the worker installs the detection device 30, i.e., the irradiation device 31, the target 32, and the camera 33, and checks the irradiation position of the laser light (measurement device installation step S3). In this measurement device installation step S3, the worker installs the irradiation device 31 at one of the four corners of the generator 1 in a position that will not interfere with other equipment when the generator 1 is jacked up later. Then, the target 32 ​​is installed on the foundation 20 below the irradiation device 31. At this time, the target 32 ​​is installed so that it is perpendicular to the vertical direction Z, i.e., the optical axis direction of the laser light. In this way, the irradiation device 31 always irradiates the target 32 ​​with laser light perpendicular to the Z direction.

[0045] The worker then adjusts the positions of the irradiation device 31 and the targets 32 so that the irradiation position of the laser light emitted from the irradiation device 31 is at the center position O of the target 32 ​​( FIG. 4 ). The worker then installs the camera 33 so that it can capture the entire image of each target 32. The images sent from each camera 33 are collected and displayed on a single display 51.

[0046] It is also possible to provide multiple displays and place them all together in one location. At least one worker monitors the horizontal position of the generator 1 on the display 51 during the subsequent jacking-up work of the generator 1. The irradiation position of the laser light on the target 32 ​​when the generator 1 is located at the first position before jacking up is defined as a reference point P1.

[0047] Next, the worker installs the support 22 on the foundation 20 below each trunnion 1A of the generator 1, and installs the hydraulic jack 10 on this support 22 via the horizontal position adjuster 40. Then, the worker extends the hydraulic jack 10 to jack up the generator 1 by several millimeters from the first position to the second position, thereby lifting it off the foundation 20 (lifting and lowering step S4).

[0048] Next, the worker installs a pedestal 21 below the support portion 1B of the generator 1, and places the generator 1 on the pedestal 21 (pedestal installation step S5).

[0049] Next, with the generator 1 jacked up to the second position in this manner, the worker confirms the irradiation position on the target 32 ​​of the laser light irradiated from the irradiation device 31 as the moving point P2 (position confirmation process (detection process) S6).

[0050] The target 32 ​​is installed on the foundation 20 independently of the generator 1. Furthermore, as described above, the target 32 ​​is installed so as to be parallel to the first plane M, which is an imaginary plane including the horizontal direction Y perpendicular to the vertical direction Z, i.e., the optical axis direction of the laser light. Therefore, the positional deviation on the target 32 ​​between the reference point P1 at the first position of the generator 1 on the target 32 ​​shown in FIG. 4 and the moving point P2 at the second position of the generator 1 shown in FIG. 5 indicates the horizontal positional deviation of the generator 1 (FIG. 5). In this way, if the generator 1 unintentionally moves horizontally when moving the generator 1 upward in the vertical direction Z using the hydraulic jack 10, the operator can check the horizontal positional deviation on the display 51.

[0051] As a result of the check in the position confirmation step S6, if an abnormality, i.e., a horizontal position deviation, is found and this horizontal position deviation exceeds a preset tolerance (position confirmation step S6, No), the worker immediately performs a position adjustment to correct the horizontal position (position adjustment step S7).

[0052] In this position adjustment step S7, the horizontal position adjuster 40 is used. To move the generator 1 in the second axis direction Y, the jack bolt 45X is rotated to move the second axis side wall 43Y of the movable base 43 in the second axis direction Y (second movement step S7B). To move the generator 1 in the first axis direction X, the jack bolt 45Y is rotated to move the second axis side wall 43Y of the movable base 42 in the first axis direction X (first movement step S7A).

[0053] As described above, the horizontal position adjuster 40 includes the first axis sidewall 41X of the fixed base 41 and the second axis sidewall 42Y of the movable base 42, which function as guides to restrict the movement direction of the generator 1 so that it does not move in any direction other than the pushing direction of the jack bolt. This prevents the generator 1 from moving in an unintended direction. Therefore, in the position adjustment step S7, the generator 1 can be moved to a desired position by performing the first movement step S7A and the second movement step S7B only once in the first axis direction X and only once in the second axis direction Y, respectively. Note that if movement of the generator 1 in the first axis direction X or the second axis direction Y is not required, the respective movement amounts are set to zero.

[0054] After the position adjustment step S7, the generator 1 is placed on the pedestal 21 (pedestal installation step S5), and the position confirmation step S6 is carried out again.

[0055] If the horizontal positional deviation of the generator 1 does not exceed the allowable value (position confirmation step S6, Yes), the worker checks whether the generator 1 has been jacked up to the set height (height confirmation step S8).

[0056] Typically, the jacking height required to remove the rotating shaft of the generator 1 ranges from several hundred millimeters to approximately 2000 mm, and a typical hydraulic jack cannot move the generator to the desired height in one jacking operation. Therefore, in the aforementioned cradle installation step S5, a cradle 21 is installed below the generator 1, and the generator 1 is temporarily placed on the cradle 21. If, in the height confirmation step S8, the generator 1 has not reached the above-mentioned set height of several hundred millimeters to approximately 2000 mm, the process returns to the lifting / lowering step S4, where the current second position is set as the new first position, and the generator is jacked up by several millimeters to the new second position. The cradle installation step S5 through the height confirmation step S8 are then repeated, and the generator 1 is jacked up until it reaches the desired height.

[0057] If the support 22 to which the horizontal position adjuster 40 is fixed is not attached to the foundation 20, when the above-mentioned lifting stroke S4 is performed again, another support 22 can be inserted between the support 22 and the foundation 20 to position the horizontal position adjuster 40 further upward in the vertical direction Z. This allows the generator 1 to reach the desired height even if there is a limit to the extension length of the hydraulic jack 10. This reduces work time and costs compared to a structure in which a moving jig is fixed to the foundation.

[0058] When the generator 1 reaches the desired height (height confirmation step S8, Yes), the worker pulls out the rotating shaft of the generator 1 and inspects the rotating shaft, the internal rotor, etc. (inspection step S9).

[0059] After the inspection process S9, the lifting process (jacking down) S10 is carried out, and the subsequent processes are carried out in the reverse order to return the generator 1 to the state it was in before the work started (measurement instrument removal process S11, connection process S12, obstruction installation process S13). In this way, the inspection work of the generator 1 is completed.

[0060] The position confirmation step S6 and position adjustment step S7 may be performed after the lifting stroke (jacking down) S10 following inspection of the generator 1. In this case, the position of the generator 1 before jacking down is defined as the first position, and the position of the generator 1 after jacking down is defined as the second position. Then, the positional relationship between the laser irradiation position and the target 32 ​​is confirmed on the display 51, and if the laser irradiation position is at the center of the target 32, the generator 1 is jacked down, placed on the pedestal 21, and the horizontal position adjuster 40 is removed.

[0061] In the above example, the lifting step S4 for jacking up the generator 1 from the first position to the second position is performed, and the pedestal installation step S5 for installing the pedestal 21 is performed. This is followed by the position confirmation step (detection step) S6 for detecting the amount of horizontal positional deviation, and then the position adjustment step S7. However, this is not limiting, and the position confirmation step (detection step) S6 may be performed in parallel with the lifting step S4. In this case, if the amount of positional deviation exceeds the allowable value while the generator 1 is being jacked up, the jacking-up operation is immediately stopped, and the position adjustment step S7 is performed.

[0062] The generator position correction device of this embodiment configured as described above is a generator position correction device that is raised and lowered vertically by an elevator device between a first position and a second position that are different in the vertical direction, and includes: a detection device that detects the amount of horizontal position deviation in a first plane that is perpendicular to the vertical direction between the generator when positioned at the first position and the generator when positioned at the second position; and an adjustment device that is arranged vertically below the generator, independently of the ceiling and side walls of the building in which the generator is stored, and is configured to move the generator only in the directions of a first axis and a second axis that are perpendicular to each other in the first plane, and that adjusts the amount of horizontal position deviation.

[0063] In this way, by moving the generator using an adjustment device configured to be movable only along the first and second axes that are perpendicular to each other within a first plane including a horizontal direction perpendicular to the vertical direction, the generator is prevented from moving in directions other than the first and second axes, shortening the work time required to adjust the generator's position and reducing costs. Furthermore, because the adjustment device is configured to be installed independently of the ceiling and side walls of the building in which the generator is stored, large, specialized equipment such as rails or chains installed on the ceiling is not required. This reduces the number of workers required for position monitoring and adjustment, further reducing costs.

[0064] Furthermore, the generator position correction method of this embodiment configured as described above comprises: a detection step of detecting the horizontal positional deviation of the generator from the first position to the second position using the detection device; and a position adjustment step of adjusting the position of the generator so that the horizontal positional deviation is reduced by performing a first movement step of moving the generator at the second position in the direction of the first axis and a second movement step of moving the generator in the direction of the second axis, each performed only once based on the detected horizontal positional deviation.

[0065] In this way, by performing the first movement step of moving the generator in the direction of the first axis and the second movement step of moving the generator in the direction of the second axis only once each, it is possible to quickly move the generator 1 to a desired position. This significantly reduces the work time required to adjust the position of the generator, further reducing costs.

[0066] Next, a position correction device 100A for the generator 1 having a different configuration from that described above will be described. Fig. 9 is a side view showing a generator 1 provided with a position correction device 100A for the generator 1 according to embodiment 1. The position correction device 100A of this embodiment is configured by adding a control unit 50 to the position correction device 100 described above, thereby forming a position correction system 1000 for the generator 1.

[0067] In the above-described position correction device 100, the horizontal positional deviation of the generator 1 was visually confirmed by an operator on the display 51, but in the position correction device 100A, the control unit 50 automatically detects this horizontal positional deviation. The control unit 50 can detect the horizontal positional deviation, for example, by placing an optical sensor on the target 32. The laser light irradiation position detected by this optical sensor can then be transmitted to the control unit 50 via a network, and the control unit 50 can analyze this irradiation position to detect the horizontal positional deviation. Alternatively, for example, a position detection device such as a video analyzer can be provided on the ceiling of a building, independent of the generator 1, and the control unit can acquire the position of the generator 1 from the video analyzer via a network and perform analysis.

[0068] More specifically, the control unit 50 sets the irradiation position of the laser light on the target 32 ​​when the generator 1 is located at the first position as a reference point, and the irradiation position of the laser light on the target 32 ​​when the generator 1 is located at the second position as a moving point, and derives the difference between the reference point and the moving point within the first plane M, and detects this difference as the horizontal position deviation amount.

[0069] If the detected amount of horizontal positional deviation exceeds a preset threshold value, which is an allowable value, the control unit 50 transmits the amount of horizontal positional deviation via the network to the horizontal position adjuster 40. Then, to reduce the detected amount of horizontal positional deviation, the control unit 50 rotates the jack bolts 45X, 45Y while adjusting the rotation speeds of the jack bolts 45X, 45Y as control amounts for each of them using a rotation device (not shown) or the like, thereby adjusting the position of the generator 1.

[0070] This allows the position of the generator to be adjusted based on the horizontal position deviation that can be detected more accurately than by visual inspection by an operator, thereby reducing the workload on the operator and significantly improving work efficiency.

[0071] FIG. 10 is a diagram showing the hardware configuration of the control unit according to the first embodiment. The control device 51 serving as the control unit 50 includes a processor 60 and a storage device 61, as shown in FIG. 10 as an example of hardware. The storage device 61 includes a volatile storage device such as a random access memory and a non-volatile auxiliary storage device such as a flash memory, both not shown. Alternatively, a hard disk auxiliary storage device may be provided instead of the flash memory. The processor 60 executes a program input from the storage device 61. In this case, the program is input to the processor 60 from the auxiliary storage device via the volatile storage device. The processor 60 may output data such as calculation results to the volatile storage device of the storage device 61, or may store the data in the auxiliary storage device via the volatile storage device.

[0072] Although exemplary embodiments are described in this application, the various features, aspects, and functions described in the embodiments are not limited to the application of a particular embodiment, but may be applied to the embodiments alone or in various combinations. Therefore, countless variations not illustrated are anticipated within the scope of the technology disclosed in this application. For example, this includes cases where at least one component is modified, added, or omitted.

[0073] 1 Generator, 10 Hydraulic jack (lifting device), 30 Detection device, 31 Irradiation device, 32 Target (light receiving surface), 33 Camera (photographing device), 40 Horizontal position adjuster (adjustment device), 41 Fixed base (first base), 42 Movable base (second base), 43 Movable base (third base), 41BO, 42BO, 43BO Bottom wall, 41X, 42X, 43X First shaft side wall, 41Y, 42Y, 43Y Second shaft side wall, 45X Jack bolt (first bolt), 45Y Jack bolt (second bolt), 46X First screw hole, 46Y Second screw hole, 47 Low friction sheet (friction adjustment member), 100, 100A Generator position correction device, 1000 Generator position correction system.

Claims

1. 1. A position correction device for a generator that is raised and lowered along a vertical direction by a lifting device between a first position and a second position that are different in a vertical direction, the position correction device comprising: a detection device that detects a horizontal positional deviation amount in a first plane in a horizontal direction perpendicular to a vertical direction between the generator when located at the first position and the generator when located at the second position; an adjustment device that is disposed vertically below the generator, independently of a ceiling and a side wall of a building in which the generator is housed, and that is configured to move the generator only in the directions of a first axis and a second axis that are perpendicular to each other within the first plane, and that adjusts the horizontal position deviation. Generator position correction device.

2. The adjustment device is A rectangular bottom wall parallel to the first surface; Two first axis side walls each extending in the first axis direction and facing each other; The base is configured by stacking three bases vertically, the bases each having a box shape and two second-axis side walls facing each other, the two second-axis side walls each extending in the second axis direction, If the pedestals are, from a vertically lower side to a vertically upper side, a first pedestal, a second pedestal, and a third pedestal, The second seat is an outer surface of the first shaft side wall of the second seat is configured to be in sliding contact with an inner surface of the first shaft side wall of the first seat, and an outer surface of the second shaft side wall of the second seat is configured to have a first distance set from an inner surface of the second shaft side wall of the first seat, The third seat is an outer surface of the second shaft side wall of the third seat is configured to be in sliding contact with an inner surface of the second shaft side wall of the second seat, and an outer surface of the first shaft side wall of the third seat is configured to have a second distance set from an inner surface of the first shaft side wall of the second seat; The generator position correction device according to claim 1 .

3. a first pressing portion that presses the first axis side wall of the third base in a direction of the second axis; a second pressing portion that presses the second axis side wall of the second base in a direction of the first axis; Equipped with The generator position correction device according to claim 2 .

4. The first pressing portion is a first bolt that presses the first shaft side wall of the third seat; a first screw hole provided in the first shaft side wall of the second base and into which the first bolt is screwed; The second pressing portion is a second bolt that presses the second shaft side wall of the second seat; a second screw hole provided in the second shaft side wall of the first base and into which the second bolt is screwed. The generator position correction device according to claim 3.

5. Between the first base and the second base, and between the second base and the third base, A friction adjusting member is provided to reduce a frictional force generated between the first base and the second base and between the second base and the third base. The generator position correction device according to claim 2 .

6. Between the first base and the second base, and between the second base and the third base, A friction adjusting member is provided to reduce a frictional force generated between the first base and the second base and between the second base and the third base. The generator position correction device according to claim 3.

7. Between the first base and the second base, and between the second base and the third base, A friction adjusting member is provided to reduce a frictional force generated between the first base and the second base and between the second base and the third base. The generator position correction device according to claim 4.

8. The thickness of the friction adjusting member in the vertical direction is determined according to the weight of the generator. The generator position correction device according to claim 5.

9. The vertical thickness of the friction adjustment member is determined according to the weight of the generator. The generator position correction device according to claim 6.

10. The vertical thickness of the friction adjustment member is determined according to the weight of the generator. The generator position correction device according to claim 7.

11. The detection device includes: an irradiation device provided in the generator for irradiating a laser beam vertically downward; A light receiving surface portion is provided vertically below the irradiation device independently of the generator, and is parallel to the first surface that receives the laser light. The generator position correction device according to any one of claims 1 to 10.

12. The detection device includes: an imaging device that images an irradiation position of the laser light on the light receiving surface; Displaying the photographed irradiation position on a display device. The generator position correction device according to claim 11.

13. The generator position correction device according to claim 3 or 4, a control unit that derives the horizontal position deviation amount, The control unit is If the detected horizontal position deviation amount exceeds a set threshold value, the horizontal position deviation amount is transmitted to the adjustment device via a network; adjusting the control amounts of the first pressing unit and the second pressing unit in the adjustment device based on the horizontal positional deviation amount, thereby adjusting the position of the generator so that the horizontal positional deviation amount of the generator is reduced. Generator position compensation system.

14. The detection device comprises: an irradiation device provided in the generator for irradiating a laser beam vertically downward; a light receiving surface portion that is disposed independently of the generator in a vertical direction of the irradiation device and is parallel to the first surface that receives the laser light, The control unit is a reference point being an irradiation position on the light receiving surface of the laser light irradiated from the irradiation device when the generator is located at the first position; When the generator is located at the second position, an irradiation position on the light receiving surface of the laser light irradiated from the irradiation device is set as a moving point, a difference between the reference point and the moving point in the first plane is detected as the horizontal positional deviation amount; The generator position correction system according to claim 13.

15. A method for correcting a position of a generator using the generator position correction device according to any one of claims 1 to 10, comprising the steps of: a detection step of detecting the horizontal position deviation of the generator from the first position to the second position by the detection device; a position adjustment step of adjusting a position of the generator so as to reduce the amount of horizontal positional deviation by performing a first movement step of moving the generator at the second position in a direction of the first axis and a second movement step of moving the generator in a direction of the second axis, each step being performed only once based on the amount of horizontal positional deviation detected. How to correct the generator position.

16. A method for inspecting a generator having a rotating machine connected to each end of a rotating shaft of the generator, comprising the steps of: a disconnection step of disconnecting a rotary machine connected to each of both ends of the generator shaft; an elevation stroke for vertically elevating and lowering the generator between a first position and a second position that are different in the vertical direction; A detection step and a position adjustment step in the generator position correction method according to claim 15, and an inspection step of inspecting the generator after the position adjustment step. How to check your generator.