Position correction device for generator, position correction system for generator, position correction method for generator, and

Abstract

The position correction device (100) is arranged on a generator (1) which is lifted in the vertical direction between a first position and a second position which are different in the vertical direction by a lifting device (10), and comprises a detection device (30) and a control device (40), the displacement sensor detects a horizontal displacement in a first plane (M) in a horizontal direction perpendicular to the vertical direction between the generator (1) at the first position and the generator (1) at the second position. And an adjustment device (50) which is disposed independently of the ceiling and the side wall of the building below the generator (1) in the vertical direction, and which is configured so as to be able to move the generator (1) only in the direction of the first axis and the direction of the second axis that are orthogonal to each other in the first surface (M), and to adjust the amount of horizontal displacement.

Description

TECHNICAL FIELD

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

[0002] As one form of a combined cycle power plant in which a gas turbine and a steam turbine drive a generator, the rotating shaft of the gas turbine is connected to one end of the rotating shaft of the generator, and the rotating shaft of the steam turbine is connected to the other end. In this form of combined cycle power plant, the rotating shaft of the gas turbine, the rotating shaft of the generator, and the rotating shaft of the steam turbine are aligned on the same straight line. In such a combined cycle power plant, there is an inspection method in which, when performing inspection of the rotating shaft, the rotor, or the like of the generator, the rotating shaft of the generator is taken out of the casing of the generator and inspection is performed.

[0003] First, the rotating shaft of the generator is separated from the rotating shaft of the gas turbine and the rotating shaft of the steam turbine. Next, one of the gas turbine and the steam turbine present in the axial direction of the generator is disassembled. Then, after moving the generator upward, the rotating shaft of the generator is pulled out of the casing of the generator in the axial direction to the side of the space vacated by the disassembly described above. Thereafter, the rotating shaft is placed at a set position, and the shaft, the rotor, or the like is subjected to inspection. In the above-described inspection method, when the rotating shaft is pulled out, the generator must be temporarily moved upward.

[0004] Although there are various methods of moving the generator upward, there is generally a method in which a hydraulic jack or the like is arranged between the generator and the base on which the generator is placed to jack up the generator. In this method, since the posture and position of the generator greatly vary, a monitor is arranged to confirm interference between the generator and surrounding equipment or the like and whether the position is deviated. When the position of the jacked-up generator deviates from the set position, the monitor connects the generator to the beam of the building by a chain block or the like and adjusts the position of the generator while pulling the chain block. However, in this method, since the beam of the existing building or the like is used, it is not possible to pull in an arbitrary direction, the movement of the generator needs to be repeatedly performed a plurality of times to position the generator at the desired position, the position adjustment takes time, and the process becomes complicated. Therefore, a moving device is disclosed which is capable of adjusting the position by a simple operation without performing connection to the longitudinal main beam or the like.

[0005] That is, in the existing moving device, the front end of a bolt (21, 22) is abutted on the side wall surface of a pedestal supporting a rotary electric machine, the pedestal is moved in the horizontal direction by rotating the bolt (21, 22), and the position of the rotary electric machine is adjusted (for example, refer to Patent Literature 1).

[0006] Prior Art Documents

[0007] Patent Documents

[0008] [Patent Document 1] Japanese Patent Laid-Open No. 8-191558 (paragraphs

[0014] to

[0015] , Figure 6 ) SUMMARY

[0009] PROBLEMS TO BE SOLVED BY THE INVENTION

[0010] However, in such a mobile device, for example, when attempting to move the generator in the axial direction of the bolt (21) by rotating the bolt (21), the pedestal can be displaced in a direction other than the pressing direction of the bolt (21). When this occurs, there is a problem in that it is necessary to repeatedly adjust the bolt a plurality of times until the generator is positioned at a desired position, and the position adjustment takes time and costs increase.

[0011] The present application discloses a technology for solving the above problem, and the object is to provide a generator position correction device, a generator position correction system, a generator position correction method, and a generator inspection method, which can shorten the work time in the generator position adjustment and reduce the cost.

[0012] MEANS OF SOLVING THE PROBLEM

[0013] The generator position correction device disclosed in the present application is a generator position correction device that lifts a generator in a vertical direction between a first position and a second position that are different from each other in the vertical direction, and includes:

[0014] a detection device that detects a horizontal position offset amount in a first plane in a horizontal direction perpendicular to the vertical direction between the generator at the first position and the generator at the second position; and

[0015] an adjustment device that is disposed below the generator in the vertical direction, independently of a ceiling and side walls of a building that houses the generator, is configured to move the generator only in a direction of a first axis and a direction of a second axis that are orthogonal to each other in the first plane, and adjusts the horizontal position offset amount.

[0016] Further, the generator position correction system disclosed in the present application includes:

[0017] a generator position correction device configured as described above; and

[0018] a control section that derives the horizontal position offset amount,

[0019] when the detected horizontal position displacement amount exceeds a set threshold value, the control section transmits the horizontal position displacement amount to the adjustment device via a network,

[0020] The control section adjusts the control amount of each of the first pressing section and the second pressing section in the adjustment device based on the horizontal position displacement amount, adjusts the position of the generator so that the horizontal position displacement amount of the generator becomes smaller.

[0021] Furthermore, the position correction method of the generator disclosed in the present application includes:

[0022] a detection process of detecting, by the detection device, the horizontal position displacement amount of the generator from the first position to the second position; and

[0023] a position adjustment process of adjusting the position of the generator so that the horizontal position displacement amount becomes smaller by performing only once, based on the detected horizontal position displacement amount, a first movement process of moving the generator in the second position in the direction of the first shaft and a second movement process of moving the generator in the second position in the direction of the second shaft.

[0024] Furthermore, the inspection method of the generator disclosed in the present application is an inspection method of a generator to which a rotating machine is connected to each of both ends of a rotating shaft of the generator, including:

[0025] a connection release process of releasing the connection of the rotating machine connected to each of both ends of the shaft of the generator;

[0026] a lifting process of lifting the generator in the vertical direction between a first position and a second position different from each other in the vertical direction;

[0027] a detection process and a position adjustment process in the position correction method of the generator; and

[0028] an inspection process of inspecting the generator after the position adjustment process.

[0029] Effects of Invention

[0030] According to the position correction device of the generator, the position correction system of the generator, the position correction method of the generator, and the inspection method of the generator disclosed in the present application, the working time in the position adjustment of the generator can be shortened and the cost can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a side view showing a generator provided with the position correction device of Embodiment 1.

[0032] Figure 2is a plan view showing the generator provided with the position correction device of Embodiment 1.

[0033] Figure 3 is a perspective view showing the generator of Embodiment 1.

[0034] Figure 4 is a perspective view partially enlarged and showing the generator provided with the position correction device of Embodiment 1.

[0035] Figure 5 is a perspective view partially enlarged and showing the generator provided with the position correction device of Embodiment 1.

[0036] Figure 6 is a perspective view showing a schematic structure of the horizontal position adjuster of Embodiment 1.

[0037] Figure 7 is a sectional view showing a schematic structure of the horizontal position adjuster of Embodiment 1.

[0038] Figure 8 is a flowchart showing a method of inspecting the generator, a method of correcting the position of the generator of Embodiment 1.

[0039] Figure 9 is a side view showing the generator provided with the position correction device having a control section of Embodiment 1.

[0040] Figure 10 is a diagram showing a structure of hardware of the control section of Embodiment 1. DETAILED DESCRIPTION

[0041] Embodiment 1.

[0042] Figure 1 is a side view showing the generator 1 in a state of being jacked up from the base 20 toward the upper side in the vertical direction Z, provided with the position correction device 100 of Embodiment 1.

[0043] Figure 2 is a plan view showing the generator 1 in a state of being jacked up from the base 20 toward the upper side in the vertical direction Z, provided with the position correction device 100 of Embodiment 1.

[0044] Figure 3 is a perspective view showing the generator 1 in a state of being jacked up from the base 20 toward the upper side in the vertical direction Z. In Figure 3 the illustration of the position correction device 100 is omitted.

[0045] First, the structure of the generator 1 will be described with reference to Figure 3

[0046] ​The generator 1 has a rotor and a rotating shaft, which are not shown, inside thereof. Moreover, a rotating shaft of a gas turbine, which is a rotating machine not shown, is connected to one end of the rotating shaft, and a rotating shaft of a steam turbine, which is a rotating machine not shown, is connected to the other end thereof, thereby constituting a single-shaft type combined cycle power plant.

[0047] During normal operation other than the inspection, the generator 1 is placed directly on the base 20 having the recessed portion 20K formed in the axial direction F, but as described above, the generator 1 is shown Figure 3 The generator 1 shown is in a state of being jacked up toward the vertical direction Z from the base 20 by a lifting device to be described later.

[0048] As Figure 3 shown, the generator 1 includes, on an outer peripheral surface thereof, a trunnion 1A of a cylindrical shape as a protruding portion protruding toward the radial direction outside with respect to the axial direction F, and a support portion IB of a columnar shape extending in the axial direction F while protruding toward the radial direction outside.

[0049] Two trunnions 1A are provided on each of the long sides of the rectangular cross section parallel to the axial direction F of the generator 1, and four in total. The support portion IB is provided so as to be located on the outer peripheral surface of the generator 1 more downward in the vertical direction Z than the trunnion 1A.

[0050] Hydraulic jacks 10 as the lifting device are arranged respectively below the trunnions 1A in the vertical direction Z. By bringing the upper end portions of the hydraulic jacks 10 into abutment with the trunnions 1A and causing the hydraulic jacks 10 to extend and contract, the generator 1 can be lifted and lowered in the vertical direction Z between first and second positions different from each other in the vertical direction Z.

[0051] The generator 1 in a state of being jacked up from the base 20 by the hydraulic jacks 10 has its support portion IB supported from below in the vertical direction Z by the multiple abutments 21.

[0052] In addition, for the generator 1 during normal operation which is not jacked up, although not shown, the support portion IB thereof is placed on the upper surface 20A of the base 20 in a state of a portion more downward in the vertical direction Z than the support portion IB thereof being accommodated in the recessed portion 20K.

[0053] Next, the position correction device 100 of the generator, which is a main part of the present embodiment, will be described.

[0054] As Figure 1 , Figure 2 shown, the position correction device 100 of the generator includes a detection device 30 that detects a positional deviation of the generator 1, a horizontal position adjuster 40 as an adjustment device that corrects a horizontal positional deviation by moving the generator 1 in the horizontal direction, and a display 51 as a display device.

[0055] First, the detection device 30 will be described.

[0056] Figure 4 is a perspective view of the detection device 30 that detects the position of the generator 1 in a first position before being jacked up.

[0057] Figure 5 is a perspective view of the detection device 30 that detects the position of the generator 1 in a second position after being jacked up.

[0058] As Figure 4 shown, the detection device 30 includes an irradiation device 31 that irradiates laser light, a target 32 that is a light-receiving surface portion that receives the laser light, and a camera 33 that is an imaging device that images the target 32.

[0059] The irradiation device 31 is installed at the end of the axial direction F of the support portion IB of the generator 1 and always irradiates laser light in the downward direction of the vertical direction Z toward the base 20.

[0060] 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.

[0061] In addition, if a virtual plane including the horizontal direction that is perpendicular to the vertical direction Z, that is, the optical axis direction of the laser light is defined as a first plane M (not shown), the target 32 is configured to be parallel to the first plane M.

[0062] The camera 33 images the irradiation position of the laser light on the target 32 and transmits the imaged image to the display 51.

[0063] In the present embodiment, the irradiation device 31 is provided at both ends of the axial direction F of the two support portions IB. Also, the target 32 and the camera 33 are provided for each of the irradiation devices 31. As described above, the detection device 30 is provided at positions corresponding to the four corners in the rectangular cross section parallel to the axial direction F of the generator 1.

[0064] The display 51 displays the image of each camera 33 provided at the position of the four corners of the generator 1.

[0065] Next, the horizontal position adjuster 40 for moving the generator 1 will be described.

[0066] As Figure 1 shown, each hydraulic jack 10 is placed on each horizontal position adjuster 40. In addition, the horizontal position adjuster 40 is installed on a bearing platform 22 provided on the base 20.

[0067] Figure 6 is a perspective view showing a brief structure of the horizontal position adjuster 40 of Embodiment 1.

[0068] Figure 7 The horizontal position adjuster 40 in embodiment 1 is in Figure 6 A cross-sectional view along the JJ line.

[0069] In addition, in the following description, the two axes orthogonal to each other within the first surface M will be referred to as the first axis X and the second axis Y, respectively.

[0070] Furthermore, in this embodiment, the axial direction F of the generator 1 is in the same direction as the second axial direction Y.

[0071] like Figure 6 As shown, the horizontal position adjuster 40 is constructed by overlapping three platforms 22—a fixed platform 41 as a first platform, a movable platform 42 as a second platform, and a movable platform 43 as a third platform—from below in the vertical direction Z upwards.

[0072] The fixed base 41 is box-shaped and has a quadrilateral bottom wall 41BO parallel to the first surface M, two first axial side walls 41X extending along the first axial direction X and opposite to each other within the first surface M, and two second axial side walls 41Y extending along the second axial direction Y and opposite to each other. The fixed base 41 is fixed to the support 22 so that the fixed base 41 does not move on the support 22.

[0073] The movable platform 42 is box-shaped and has a quadrilateral bottom wall 42BO parallel to the first surface M, two first axial side walls 42X extending along the first axial direction X and opposite to each other within the first surface M, and two second axial side walls 42Y extending along the second axial direction Y and opposite to each other. The movable platform 42 is not fixed to the movable platform 41.

[0074] The movable platform 43 is box-shaped and has a quadrilateral bottom wall 42BO parallel to the first surface M, two first axial side walls 43X extending along the first axial direction X and opposite to each other within the first surface M, and two second axial side walls 43Y extending along the second axial direction Y and opposite to each other. The movable platform 43 is not fixed to the movable platform 42.

[0075] The movable platform 42 is configured such that the outer side of its first axial sidewall 42X slides in contact with the inner side of the first axial sidewall 41X of the fixed platform 41, and there is a set first gap D1 between the outer side of its second axial sidewall 42Y and the inner side of the second axial sidewall 41Y of the fixed platform 41.

[0076] Furthermore, the movable platform 43 is configured such that the outer side of its second axial sidewall 43Y slides in contact with the inner side of the second axial sidewall 42Y of the movable platform 42, and there is a set second gap D2 between the outer side of its first axial sidewall 43X and the inner side of the first axial sidewall 42X of the movable platform 42.

[0077] The lower end of the hydraulic jack 10 rests on the bottom wall 43BO of the movable platform 43.

[0078] Furthermore, the horizontal position adjuster 40 includes a first pressing part that presses against the first axial sidewall 43X of the movable platform 43 along the second axial direction Y. In this embodiment, the first pressing part includes a jack bolt 45X, which serves as a first bolt, for pressing against the first axial sidewall 43X of the movable platform 43, and a first threaded hole 46X provided on the first axial sidewall 42X of the movable platform 42 and into which the jack bolt 45X is screwed.

[0079] Furthermore, the horizontal position adjuster 40 includes a second pressing part that presses against the second axial sidewall 42Y of the movable platform 42 along the first axial direction X. In this embodiment, the second pressing part includes a jack bolt 45Y, which serves as a second bolt, for pressing against the second axial sidewall 42Y of the movable platform 42, and a second threaded hole 46Y provided on the second axial sidewall 41Y of the fixed platform 41 and screwed with the jack bolt 45Y.

[0080] Here, as Figure 7 As shown, a low-friction plate 47, serving as a friction adjustment member, is disposed between the fixed platform 41 and the movable platform 42 and between the movable platform 42 and the movable platform 43. The low-friction plate 47 reduces the frictional forces generated between the fixed platform 41 and the movable platform 42 and between the movable platform 42 and the movable platform 43, respectively.

[0081] The structure of the low-friction plate 47 is explained.

[0082] like Figure 7 As shown, the low-friction plate 47 is composed of two friction plates 48.

[0083] One surface of each friction plate 48 is a high-friction surface 48H that inhibits relative movement between itself and the abutting component through frictional force, and the other surface is a sliding surface 48L that has lower frictional force than the high-friction surface 48H and reduces the frictional force generated between itself and the abutting component.

[0084] Furthermore, the low-friction plate 47 is formed by overlapping the sliding surfaces 48L of the two friction plates 48 in a manner that makes them face each other.

[0085] Thus, when the hydraulic jack 10 for supporting the generator 1 is installed on the bottom wall 43BO of the movable pedestal 43, the movable pedestal 43 and the friction plate 48 provided below the bottom wall 43BO of the movable pedestal 43 do not slide and do not relatively move at the boundary portion BD1 due to the frictional force generated by the weight of the generator 1. Further, the movable pedestal 42 and the friction plate 48 provided above the bottom wall 42BO of the movable pedestal 42 do not slide and do not relatively move at the boundary portion BD3 due to the frictional force generated by the weight of the generator 1.

[0086] Likewise, the movable pedestal 42 and the friction plate 48 provided below the bottom wall 42BO of the movable pedestal 42 do not slide at the boundary portion BD4. Further, the fixed pedestal 41 and the friction plate 48 provided above the bottom wall 41BO of the fixed pedestal 41 do not slide at the boundary portion BD6.

[0087] On the other hand, at the boundary portions BD2, BD5 where the sliding surfaces 48L of the friction plates 48 abut against each other, the overlapping friction plates 48 slide against each other and relatively move.

[0088] Here, in order to move the generator 1 in the first axial direction X, the rotary jack bolt 45Y is rotated so as to advance the jack bolt 45Y in the first axial direction X. Thus, the front end portion of the jack bolt 45Y presses the second axial side wall 42Y of the movable pedestal 42 in the first axial direction X.

[0089] At this time, since the fixed pedestal 41 is fixed to the base 20, the friction plates 48 abutting against each other at the boundary portion BD5 relatively move. That is, the movable pedestal 42 and the movable pedestal 43 above the boundary portion BD5 integrally slide in the first axial direction X, and the generator 1 is moved in the first axial direction X by the hydraulic jack 10 placed on the movable pedestal 43.

[0090] At this time, the first axial side wall 42X of the movable pedestal 42 is in sliding contact with the first axial side wall 41X of the fixed pedestal 41, and thus the movable pedestal 42 does not move with respect to the second axial direction Y. Thus, the first axial side wall 41X of the fixed pedestal 41 functions as a guide so that the movable pedestal 42 does not move in a direction other than the pressing direction of the jack bolt 45Y.

[0091] Further, the jack bolt 45Y has a structure in which, although the reaction force from the movable pedestal 42 is applied, the reaction force from the movable pedestal 42 is received by the internal thread provided in the second threaded hole 46Y of the fixed pedestal 41.

[0092] Further, in order to move the generator 1 in the second axial direction Y, the jack bolt 45X is rotated so as to advance the jack bolt 45X in the second axial direction Y. By this, the front end portion of the jack bolt 45X presses the second axial side wall 43X of the moving base 43 in the second axial direction Y.

[0093] At this time, the friction plates 48 that abut against each other at the boundary portion BD2 above which the moving base 43 slides in the second axial direction Y move relative to each other. That is, the generator 1 is moved in the second axial direction Y by the hydraulic jack 10 placed on the moving base 43.

[0094] By this, the second axial side wall 42Y of the moving base 42 functions as a guide so that the moving base 43 does not move in a direction other than the pressing direction of the jack bolt 45X.

[0095] Further, the jack bolt 45X has a structure that, although receiving a reaction force from the moving base 43, can withstand the reaction force from the moving base 43 by the internal thread provided in the first threaded hole 46X of the moving base 42.

[0096] In this way, the moving direction of the horizontal position adjuster 40 is restricted so that the generator 1 does not move in a direction other than the pressing direction of the jack bolt. By this, it is possible to prevent the generator 1 from moving in an undesired direction.

[0097] Further, although the above describes one example structure of the horizontal position adjuster 40, as long as the horizontal position adjuster 40 is configured to be movable only in the first axial direction X and the second axial direction Y, other structures can be used.

[0098] Further, although the jack bolt is described as a means for pressing the moving bases 42, 43, the present application is not limited to this and can use other structures as long as the moving bases 42, 43 can be moved in the first axial direction X and the second axial direction Y.

[0099] Further, the thickness of the friction plates 48 in the vertical direction is determined in accordance with the weight of the generator 1, and the friction plates 48 can smoothly move relative to each other even when a heavy generator 1 is placed.

[0100] A method for inspecting the generator 1 using the position correction device 100 configured as described above and a method for correcting the position of the generator 1 will be described.

[0101] Figure 8 is a flowchart showing the method for inspecting the generator 1 and the method for correcting the position when inspecting the generator 1 of the present embodiment.

[0102] As described above, although not shown, the generator 1 in normal operation other than during inspection is in a state where the support portion 1B thereof is placed on the upper surface 20A of the base 20.

[0103] Here, the position of the generator 1 before being lifted in the vertical direction Z, that is, before the generator 1 is jacked up in the following description, is set as a first position.

[0104] First, when the generator 1 is jacked up upward from the first position, the operator removes an interference (interference removal process S1) that becomes an obstacle at the time of the jacking up.

[0105] As the interference at the time of the movement, although not shown, there are, for example, a connection portion between the main terminal portion of the generator 1 and an external terminal or various members existing around the same, a connection portion between the rotating shafts of the gas turbine and the steam turbine as rotating machines and the generator 1 or various members existing around the same, and the like.

[0106] Next, the operator disconnects the connection between the rotating shaft of the gas turbine and the rotating shaft of the generator 1, and disconnects the connection between the rotating shaft of the generator 1 and the rotating shaft of the steam turbine (connection disconnection process S2).

[0107] In the connection disconnection process S2, for example, a connection bolt or the like in a coupling portion for connecting the rotating shafts to each other is removed.

[0108] Next, the operator sets the detection device 30, that is, the irradiation device 31, the targets 32, and the cameras 33, and confirms the irradiation positions of the laser light (measurer setting process S3).

[0109] In the measurer setting process S3, the operator installs the irradiation device 31 at positions of the four corners of the generator 1 that will not interfere with other equipment at the time of the jacking up to be performed later. Then, the targets 32 are set on the base 20 below the irradiation device 31. At this time, the targets 32 are set to be perpendicular to the vertical direction Z, that is, the optical axis direction of the laser light.

[0110] Thus, the irradiation device 31 always irradiates the laser light perpendicularly to the targets 32.

[0111] Then, the operator adjusts the positions of the irradiation device 31 and the targets 32 so that the irradiation position of the laser light irradiated from the irradiation device 31 becomes the center position O of the targets 32. Figure 4 ).

[0112] Then, the operator sets the cameras 33 so that the entire bodies of the respective targets 32 are captured.

[0113] The images transmitted from the respective cameras 33 are concentrated and displayed on one display 51.

[0114] Further, a plurality of displays can be provided and arranged in a concentrated manner.

[0115] Further, at least one worker monitors the horizontal position of the generator 1 on the display 51 during the subsequent jacking operation of the generator 1.

[0116] Further, the position of the laser irradiation on the target 32 when the generator 1 is positioned at the first position before jacking is set as a reference point Pl.

[0117] Next, the worker installs the bearing platform 22 under each trunnion 1A of the generator 1 on the base 20 and sets the hydraulic jack 10 on the bearing platform 22 via the horizontal position adjuster 40. Then, the worker extends the hydraulic jack 10 to jack up the generator 1 by several millimeters or so from the first position to the second position to lift it from the base 20 (lifting process S4).

[0118] Next, the worker sets the bearing platform 21 under the support portion IB of the generator 1 and places the generator 1 on the bearing platform 21 (bearing platform setting process S5).

[0119] Next, in the generator 1 thus jacked up to the second position, the worker confirms the position of the laser irradiation on the target 32 from the irradiation device 31 as a movement point P2 (position confirmation process (detection process) S6).

[0120] The target 32 is provided on the base 20 independently of the generator 1. Further, as described above, the target 32 is provided parallel to the first plane M, which is a virtual plane containing the horizontal direction Y perpendicular to the vertical direction Z, i.e., the optical axis direction of the laser.

[0121] Thus, Figure 4 the position of the generator 1 at the reference point Pl on the target 32 shown in FIG. 6, and Figure 5 the position of the generator 1 at the movement point P2 on the target 32 shown in FIG. 7 indicates the amount of positional deviation of the generator 1 in the horizontal direction Figure 5 ).

[0122] Thus, when the worker moves the generator 1 upward in the vertical direction Z via the hydraulic jack 10, in the case where the generator 1 is unexpectedly moved in the horizontal direction, the worker can confirm the amount of horizontal positional deviation on the display 51.

[0123] In the case where the result of the confirmation in the position confirmation process S6 is abnormal, i.e., the generation of the amount of horizontal positional deviation is recognized, and the amount of horizontal positional deviation exceeds a predetermined allowable value (position confirmation process S6, No), the worker immediately performs position adjustment for correcting the horizontal position (position adjustment process S7).

[0124] In this position adjustment process S7, the horizontal position adjuster 40 is used.

[0125] In order to move the generator 1 in the second axial direction Y, the second axial side wall 43Y of the moving base 43 is moved in the second axial direction Y by rotating the jack bolt 45X (second moving process S7B). Also, in order to move the generator 1 in the first axial direction X, the second axial side wall 43Y of the moving base 42 is moved in the first axial direction X by rotating the jack bolt 45Y (first moving process S7A).

[0126] As described above, the horizontal position adjuster 40 includes the first axial side wall 41X of the fixed base 41 and the second axial side wall 42Y of the moving base 42, which function as guides that restrict the moving direction of the generator 1 so that the generator 1 does not move in a direction other than the pressing direction of the jack bolt. Thus, it is possible to prevent the generator 1 from moving in an unintended direction.

[0127] Thus, in the position adjustment process S7, the generator 1 is moved only once in the first axial direction X and only once in the second axial direction Y, that is, by performing the first moving process S7A and the second moving process S7B only once, respectively, it is possible to move the generator 1 to the desired position.

[0128] In addition, when the generator 1 does not need to be moved in the first axial direction X or in the second axial direction Y, the respective moving amount is set to zero.

[0129] After the position adjustment process S7, the generator 1 is placed on the bearing platform 21 (bearing platform setting process S5), and the position confirmation process S6 is performed again.

[0130] In the case where the horizontal position offset of the generator 1 does not exceed the allowable value (position confirmation process S6, Yes), the operator confirms whether the generator 1 is jacked up to the set height (height confirmation process S8).

[0131] In general, the jacking height required to pull out the rotating shaft of the generator 1 is about several hundred mm to 2000 mm or so, and for a general hydraulic jack, it is not possible to move the generator to the prescribed height by one jacking operation. Therefore, in the above bearing platform setting process S5, the bearing platform 21 is set below the generator 1, and the generator 1 is temporarily placed on the bearing platform 21. Then, in the height confirmation process S8, when the generator 1 does not reach the above set height of several hundred mm to 2000 mm or so, the process returns to the lifting process S4, the current second position is set as a new first position, and the generator 1 is jacked up by several mm or so to the new second position. Then, the bearing platform setting process S5 to the height confirmation process S8 are repeated, and jacking is performed until the generator 1 reaches the desired height.

[0132] In addition, if the structure is such that the base 20 is not provided with the abutment 22 on which the horizontal position adjuster 40 is fixed, when the lifting procedure S4 is performed again, the horizontal position adjuster 40 can be positioned at a position higher in the vertical direction Z by inserting another abutment 22 between the abutment 22 and the base 20. Thus, even in the case where the extension length of the hydraulic jack 10 is limited, the generator 1 can reach the desired height.

[0133] Thus, compared to the structure in which the mobile jig is fixed to the base, the operation time and cost can be reduced.

[0134] When the generator 1 reaches the desired height (height confirmation procedure S8, Yes), the operator pulls out the rotating shaft of the generator 1, and checks the rotating shaft, the inner rotor, and the like (checking procedure S9).

[0135] After the checking procedure S9 is performed, the lifting procedure (jack down) S10 is performed, and the subsequent procedures return the generator 1 to the state before the operation is started in the reverse order (measurer removal procedure S11, connection stroke S12, interference object installation procedure S13).

[0136] Thus, the checking operation of the generator 1 is completed.

[0137] In addition, the position confirmation procedure S6 and the position adjustment procedure S7 can be performed after the lifting procedure (jack down) S10 after the generator 1 is checked.

[0138] In this case, the position of the generator 1 before being jacked up is set as the first position, and the position of the generator 1 after being jacked up is set as the second position. Then, the position relationship between the laser irradiation position and the target 32 is confirmed on the display 51, and if the laser irradiation position is positioned at the center of the target 32, the generator 1 is jacked up, the generator 1 is placed on the abutment 21, and the horizontal position adjuster 40 is removed.

[0139] In addition, in the above, an example is shown in which the lifting procedure S4 in which the generator 1 is jacked up from the first position to the second position is performed, and the abutment installation procedure S5 in which the abutment 21 is provided is performed, and then the position confirmation procedure (detection procedure) S6 in which the horizontal position offset amount is detected is performed, and then the position adjustment procedure S7 is performed. However, this is not limiting, and the position confirmation procedure (detection procedure) S6 can be performed in parallel during the lifting procedure S4 is performed. In this case, when the position offset amount exceeds the allowable value during the jacking up of the generator 1, the jacking up operation is temporarily stopped immediately, and the position adjustment procedure S7 is performed.

[0140] The position correction device of the generator of the present embodiment configured as described above is a position correction device of a generator that is lifted in the vertical direction between a first position and a second position that are different from each other in the vertical direction by a lifting device, including:

[0141] a detection device that detects a horizontal position offset amount in a first plane in a horizontal direction perpendicular to the vertical direction between the generator at the first position and the generator at the second position; and

[0142] an adjustment device that is disposed below the generator in the vertical direction independently of a ceiling and side walls of a building that houses the generator, configured to move the generator only in a direction of a first axis and a direction of a second axis that are orthogonal to each other in the first plane, and adjust the horizontal position offset amount.

[0143] Thus, the generator is moved by the adjustment device that is movable only in the direction of the first axis and the direction of the second axis that are orthogonal to each other in the first plane including the horizontal direction orthogonal to the vertical direction, so that movement of the generator in directions other than the first axis and the second axis can be prevented, the work time in the position adjustment of the generator can be shortened, and cost reduction can be achieved.

[0144] Further, since the adjustment device has a structure disposed independently of the ceiling and the side walls of the building that houses the generator, large and special equipment such as a rail or a chain provided on the ceiling is not required. Thus, the number of workers involved in the position monitoring and the position adjustment can be reduced, and further cost reduction can be achieved.

[0145] Further, the position correction method of the generator of the present embodiment configured as described above includes:

[0146] a detection process of detecting, by the detection device, the horizontal position offset amount of the generator from the first position to the second position; and

[0147] a position adjustment process of adjusting the position of the generator so that the horizontal position offset amount becomes smaller by performing only once, respectively, a first movement process of moving the generator at the second position in the direction of the first axis and a second movement process of moving the generator at the second position in the direction of the second axis based on the detected horizontal position offset amount.

[0148] Thus, by performing only once, respectively, the first movement process of moving the generator in the direction of the first axis and the second movement process of moving the generator in the direction of the second axis, the generator 1 can be quickly moved to a desired position.

[0149] Thus, the operation time for adjusting the position of the generator can be greatly reduced, and the cost can be further reduced.

[0150] Next, a position correction device 100A of a generator 1 having a different structure from the above-described structure will be described.

[0151] Figure 9 FIG. 2 is a side view showing the generator 1 of the position correction device 100A provided with the generator 1 of Embodiment 1.

[0152] The position correction device 100A of the present embodiment further has a control section 50 with respect to the above-described position correction device 100, thereby constructing a position correction system 1000 of the generator 1.

[0153] In the above-described position correction device 100, the operator visually confirms the horizontal position offset amount of the generator 1 through the display 51, whereas in the position correction device 100A, the control section 50 automatically detects the horizontal position offset amount.

[0154] In the detection of the horizontal position offset amount by the control section 50, for example, an optical sensor is arranged on the target 32. Then, the irradiation position of laser light detected by the optical sensor can be transmitted to the control section 50 via a network, and the control section 50 can detect the horizontal position offset amount by analyzing the irradiation position.

[0155] Further, for example, a position detection device constituted by a video analysis device or the like, which is independent of the generator 1, for example, is provided on the ceiling of a building, and the control section can acquire the position of the generator 1 from the video analysis device via a network and analyze it.

[0156] More specifically, the control section 50 detects the difference between the reference point and the movement point within the first surface M by taking the irradiation position of laser light on the target 32 when the generator 1 is located at the first position as the reference point and taking the irradiation position of laser light on the target 32 when the generator 1 is located at the second position as the movement point, thereby detecting the difference as the horizontal position offset amount.

[0157] Then, when the detected horizontal position offset amount exceeds a set threshold value, i.e., an allowable value, the control section 50 transmits the horizontal position offset amount to the horizontal position adjuster 40 via a network.

[0158] Then, the jackscrews 45X, 45Y are simultaneously rotated while adjusting the number of rotations as the control amount of each of the jackscrews 45X, 45Y by a not-shown rotation device or the like, so as to reduce the detected horizontal position offset amount, thereby adjusting the position of the generator 1.

[0159] Thus, the position adjustment of the generator can be performed based on the horizontal position deviation amount detected with higher accuracy than the visual observation by the worker. Thus, the work load of the worker can be reduced, and the work efficiency can be greatly improved.

[0160] Figure 10 FIG. 1 is a diagram showing a hardware structure of the control section according to Embodiment 1.

[0161] As one example of the hardware as shown in FIG. 1, the control device 51 of the control section 50 is constituted by a processor 60 and a storage device 61. Although the storage device 61 is not shown, it includes a volatile storage device such as a random access memory, a non-volatile auxiliary storage device such as a flash memory. Figure 10

[0162] In addition, an auxiliary storage device such as a hard disk can be included instead of the flash memory. The processor 60 executes a program input from the storage device 61. In this case, the program is input from the auxiliary storage device to the processor 60 via the volatile storage device. In addition, the processor 60 can output data such as a calculation result to the volatile storage device of the storage device 61, and can save the data to the auxiliary storage device via the volatile storage device.

[0163] The present application describes exemplary embodiments, but the various features, modes, and functions described in the embodiments are not limited to the application of specific embodiments, and can be applied to the embodiments individually or in various combinations.

[0164] Therefore, countless modifications not exemplified can be conceived within the technical scope disclosed in the present application. For example, cases where at least one structural element is modified, added, or omitted are included.

[0165] Explanation of Reference Numerals

[0166] 1 generator, 10 hydraulic jack (lifting device), 30 detection device, 31 irradiation device, 32 target (light receiving surface portion), 33 camera (imaging device), 40 horizontal position adjuster (adjusting device), 41 fixed pedestal (first pedestal), 42 movable pedestal (second pedestal), 43 movable pedestal (third pedestal), 41BO, 42BO, 43BO bottom wall, 41X, 42X, 43X first-axis-side wall, 41Y, 42Y, 43Y second-axis-side wall, 45X jack bolt (first bolt), 45Y jack bolt (second bolt), 46X first threaded hole, 46Y second threaded hole, 47 low-friction sheet (friction adjusting member), 100, 100A position correction device of generator, 1000 position correction system of generator.​

Claims

1. A position correction device of a generator, the generator being raised and lowered in a vertical direction between first and second positions different in the vertical direction by a lifting device, the position correction device of the generator characterized by comprising: detection means that detects a horizontal positional offset in a first plane in a horizontal direction perpendicular to the vertical direction between the generator at the first position and the generator at the second position; and adjustment means that is disposed below the generator in the vertical direction independently of a ceiling and side walls of a building that houses the generator, configured to move the generator only in directions of first and second axes that are orthogonal to each other in the first plane, and adjusts the horizontal positional offset.

2. The position correction device of the generator according to claim 1, characterized in that: the adjustment means is configured by stacking three pedestals of a box shape in the vertical direction, the pedestals having: a quadrangular bottom wall parallel to the first plane, two first-axis side walls that extend in the direction of the first axis and are opposed to each other, and two second-axis side walls that extend in the direction of the second axis and are opposed to each other, if the pedestals are provided from below in the vertical direction to above in the vertical direction as a first pedestal, a second pedestal, and a third pedestal, the second pedestal is configured such that an outer side surface of the first-axis side wall of the second pedestal is in sliding contact with an inner side surface of the first-axis side wall of the first pedestal, and a first interval is provided between an outer side surface of the second-axis side wall of the second pedestal and an inner side surface of the second-axis side wall of the first pedestal, the third pedestal is configured such that an outer side surface of the second-axis side wall of the third pedestal is in sliding contact with an inner side surface of the second-axis side wall of the second pedestal, and a second interval is provided between an outer side surface of the first-axis side wall of the third pedestal and an inner side surface of the first-axis side wall of the second pedestal, comprising: a first pressing portion that presses the first-axis side wall of the third pedestal in the direction of the second axis, and a second pressing portion that presses the second-axis side wall of the second pedestal in the direction of the first axis.

4. The position correction device of the generator according to claim 3, characterized in that: the first pressing portion is configured to have: a first bolt that presses the first-axis side wall of the third pedestal, and a first threaded hole that is provided on the first-axis side wall of the second pedestal and into which the first bolt is screwed, the second pressing portion is configured to have: a second bolt that presses the second-axis side wall of the second pedestal, and a second threaded hole that is provided on the second-axis side wall of the first pedestal and into which the second bolt is screwed.

5. The position correction device of the generator according to any one of claims 2 to 4, characterized in that: a friction adjustment member is provided between the first pedestal and the second pedestal and between the second pedestal and the third pedestal. ​ ​ ​ ​ ​ ​ ​ ​ 3. The position correction device of the electric generator according to claim 2, wherein ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The friction adjustment member reduces the frictional force generated between the first pedestal and the second pedestal and between the second pedestal and the third pedestal.

6. The position correction device of a generator according to claim 5, wherein The thickness of the friction adjustment member in the vertical direction is determined in accordance with the weight of the generator.

7. The position correction device of a generator according to any one of claims 1 to 6, wherein The detection device includes: an irradiation device provided on the generator and irradiating a laser toward a vertical direction below; and a light-receiving surface portion provided independently of the generator below the irradiation device in the vertical direction and parallel to the first surface that receives the laser.

8. The position correction device of a generator according to claim 7, wherein The detection device includes: a photographing device that photographs the irradiation position of the laser on the light-receiving surface portion, a display device that displays the photographed irradiation position.

9. A position correction system for an electric generator, characterized by includes: the position correction device of a generator according to claim 3 or 4; and a control portion that derives the horizontal position offset, when the detected horizontal position offset exceeds a set threshold value, the control portion transmits the horizontal position offset to the adjustment device via a network, the control portion adjusts the control amount of each of the first pressing portion and the second pressing portion in the adjustment device based on the horizontal position offset, adjusts the position of the generator so that the horizontal position offset of the generator becomes smaller.

10. The position correction system of a generator according to claim 9, wherein The detection device includes: an irradiation device provided on the generator and irradiating a laser toward a vertical direction below; and a light-receiving surface portion provided independently of the generator below the irradiation device in the vertical direction and parallel to the first surface that receives the laser, in the control portion, the irradiation position of the laser on the light-receiving surface portion when the generator is at the first position is set as a reference point, the irradiation position of the laser on the light-receiving surface portion when the generator is at the second position is set as a movement point, the difference between the reference point and the movement point in the first plane is detected as the horizontal position offset.

11. A position correction method of a generator using a position correction device of the generator according to any one of claims 1 to 8, characterized by, includes: a detection process of detecting the horizontal position offset of the generator from the first position to the second position by the detection device; and a position adjustment process of adjusting the position of the generator so that the horizontal position offset becomes smaller by performing only once, respectively, a first movement process of moving the generator at the second position in the direction of the first shaft and a second movement process of moving the generator at the second position in the direction of the second shaft based on the detected horizontal position offset.

12. An inspection method of a generator whose rotary machines are connected to each of both ends of a rotary shaft of the generator, characterized by comprising: a connection disconnecting process of disconnecting the connection to the rotary machines connected to each of both ends of the shaft of the generator; a lifting process of lifting the generator in the vertical direction between a first position and a second position different from each other in the vertical direction; the detection process and the position adjusting process in the position correction method of the generator according to claim 11; and an inspection process of inspecting the generator after the position adjusting process.

Images