Installation assisting device of rotary machine and installation method of rotary machine

Abstract

To provide an installation assisting device of a rotary machine and an installation method of the rotary machine that enable easier installation in a shorter time.SOLUTION: There is provided an installation assisting device of a rotary machine that assists installation of the rotary machine on an installation surface including a cylindrical stator and a rotor rotatably supported in a state of being inserted into the stator. The installation assisting device includes a plurality of jacks capable of adjusting a height of the stator, a plurality of displacement meters measuring a gap between the stator and the rotor, and a control device that calculates, based on a measurement result of the plurality of displacement meters, an operation amount of each of the plurality of jacks for setting each of a plurality of gaps between the stator and the rotor within a predetermined range, generates a control signal for each of the plurality of jacks according to the operation amount, and controls the operation of each of the plurality of jacks, thereby lowering the stator according to the lowering of the rotor by a lifting device.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] An embodiment of the present invention relates to an installation assist device for a rotating machine and an installation method for a rotating machine. [Background technology]

[0002] Large rotating machines, such as large generators in thermal power plants and electric motors for large-capacity air compressors, include a cylindrical stator and a rotor that is inserted into the stator and supported for rotation.

[0003] Large rotating machines can have a total weight of over 100 tons, making it difficult to transport the stator and rotor together to the installation location. For this reason, the stator and rotor are transported separately and then integrated at the installation location.

[0004] Furthermore, in large rotating machines, the stator and rotor may be installed with portions of them protruding below the installation surface. The stator is installed on both ends of the stator in the width direction on the installation surface. Furthermore, portions of the stator and rotor in the center of the width direction (portions with larger diameters) are disposed, for example, in an underground space excavated below the installation surface. In this case, the rotor cannot be inserted into the stator when the stator is installed on the installation surface. Therefore, the rotor must be inserted into the stator after the stator is raised to a height that allows the rotor to be inserted.

[0005] With the stator raised, the rotor is inserted into the stator, and then the raised stator and rotor are lowered to the installation surface. This allows the installation of the rotating machine even if parts of the stator and rotor protrude below the installation surface.

[0006] As described above, large rotating machines are extremely heavy, making it difficult to simultaneously hoist the stator and rotor using a lifting device such as an overhead crane. For this reason, an installation method known as a jack-down method is used to lower the elevated stator and rotor to the installation surface.

[0007] In the jack-down method, the stator is supported by multiple jacks, and the rotor inserted into the stator is lifted up with a lifting device. In this state, the multiple jacks and the lifting device are operated alternately to gradually lower the stator and rotor alternately by the amount of the gap between them. This allows the stator and rotor to be lowered to the installation surface even if the total weight of the stator and rotor exceeds the capacity of the lifting device.

[0008] However, the gap between the stator and rotor is about 10 mm to 20 mm (e.g., 15 mm), and the amount by which the stator and rotor can be lowered at one time is only a few millimeters. Furthermore, each time the stator and rotor are lowered, the size of the gap must be checked visually or with a taper gauge, for example. For this reason, the task of lowering the stator and rotor to the installation surface requires a very long work time and a great deal of labor from the workers.

[0009] Therefore, in the case of a large rotating machine that is installed with parts of the stator and rotor protruding below the installation surface, it is desirable to make the installation easier and faster. [Prior art documents] [Patent documents]

[0010] [Patent Document 1] Japanese Patent Application Laid-Open No. 2007-106587 Summary of the Invention [Problem to be solved by the invention]

[0011] Advantageous Effects of Invention Embodiments of the present invention provide an installation assistance device for a rotating machine and an installation method for a rotating machine that allow for easier and shorter installation times. [Means for solving the problem]

[0012] According to an embodiment of the present invention, there is provided an installation assisting device for a rotating machine that assists in the installation of a rotating machine, the rotating machine including a cylindrical stator and a rotor rotatably supported in a state inserted within the stator, the rotating machine being installed in a state in which portions of the stator and the rotor protrude below an installation surface, the installation assisting device including: a plurality of jacks that support the stator and enable adjustment of the height of the stator; a plurality of displacement meters that measure gaps between the stator and the rotor; and a control device that generates a plurality of control signals for controlling the operation of each of the plurality of jacks based on measurement results of the plurality of displacement meters, and controls the operation of each of the plurality of jacks by inputting the control signals corresponding to each of the plurality of jacks; and the control device raises the stator to a height that allows the rotor to be inserted. When installing the rotating machine by a jack-down method in which the rotor is inserted into the stator using a lifting device, the stator is supported by the multiple jacks, and then the stator and rotor are lowered to the installation surface using the multiple jacks and the lifting device, the rotating machine installation auxiliary device calculates the amount of movement of each of the multiple jacks based on the measurement results of the multiple displacement meters to keep each of the multiple gaps between the stator and the rotor within a predetermined range, generates the control signal for each of the multiple jacks according to the amount of movement, inputs the control signal corresponding to each of the multiple jacks, and controls the operation of each of the multiple jacks, thereby lowering the stator in accordance with the descent of the rotor by the lifting device. [Effects of the Invention]

[0013] An installation auxiliary device for a rotating machine and an installation method for a rotating machine are provided, which allow installation to be performed more simply and in a shorter time. [Brief explanation of the drawings]

[0014] [Figure 1] 1(a) and 1(b) are a front view and a side view that schematically show a rotating machine and an installation auxiliary device according to an embodiment. [Figure 2] FIG. 2 is a block diagram schematically illustrating a control device according to the embodiment. [Figure 3] 4 is a flowchart schematically illustrating an example of a method for installing a rotating machine using the installation assist device according to the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0015] Each embodiment will be described below with reference to the drawings. The drawings are schematic or conceptual, and the relationship between the thickness and width of each part, the size ratio between parts, etc. are not necessarily the same as those in reality. Furthermore, even when the same part is shown, the dimensions and ratios may be different depending on the drawing. In the present specification and the drawings, elements similar to those described above with reference to the previous drawings are designated by the same reference numerals, and detailed descriptions thereof will be omitted as appropriate.

[0016] 1(a) and 1(b) are a front view and a side view that schematically show a rotating machine and an installation auxiliary device according to an embodiment. As shown in FIGS. 1(a) and 1(b), the rotating machine 2 includes a stator 3 and a rotor 4. The stator 3 is cylindrical. The rotor 4 is inserted into the stator 3 and rotatably supported. The rotating machine 2 is a large rotating machine with a total weight exceeding 50 tons, for example.

[0017] 1(a) is a schematic front view of the cylindrical stator 3 as viewed in the axial direction. FIG. 1(b) is a schematic side view of the stator 3 as viewed from the side (perpendicular to the axial direction). Also, FIGS. 1(a) and 1(b) are schematic views of the rotating machine 2 being installed using an installation auxiliary device 10.

[0018] The stator 3 includes, for example, a cylindrical stator body 3a having a through-hole-like insertion portion extending linearly in the horizontal direction, and a stator frame 3b that supports the stator body 3a. The stator body 3a includes, for example, a stator core and a stator winding (stator coil).

[0019] The rotor 4 includes, for example, a rotor body 4a inserted into the insertion portion of the stator body 3a, and a shaft 4b for rotatably supporting the rotor body 4a. The rotor body 4a includes, for example, a rotor core and a rotor winding (rotor coil). The shaft 4b extends to the outside of the stator body 3a when the rotor body 4a is inserted into the insertion portion of the stator body 3a. With the rotor body 4a inserted into the insertion portion of the stator body 3a, both ends of the shaft 4b are supported by bearings (not shown), allowing the rotor 4 to rotate around a horizontal axis while inserted within the stator 3a.

[0020] The rotating machine 2 functions as an electric motor that receives an external supply of electric power to rotate the rotor 4, or as a generator that generates electricity by rotating the rotor 4 in response to an external force. The configurations of the stator 3 and the rotor 4 are not limited to those described above. The rotor body 4a may be, for example, a squirrel-cage conductor. The rotor body 4a does not necessarily have to have a rotor winding. The configurations of the stator 3 and the rotor 4 may be any configuration that allows the rotating machine 2 to function appropriately as an electric motor or a generator by allowing the rotor 4 to rotate while inserted into the cylindrical stator 3.

[0021] The installation assist device 10 for the rotating machine 2 assists in the installation of the rotating machine 2 on an installation surface BP. The installation surface BP is, for example, the floor surface (support surface) of a building on which the rotating machine 2 is installed. The installation surface BP may also be called, for example, a base plate.

[0022] The rotating machine 2 is installed with portions of the stator 3 and rotor 4 protruding below the installation surface BP. In a large rotating machine 2, for example, approximately the lower one-third of the stator 3 and rotor 4 may protrude below the installation surface BP. The stator 3 is installed on the installation surface BP via installation surfaces 3c provided on both ends of the stator frame 3b in the width direction, for example. The portions of the stator 3 and rotor 4 protruding below the installation surface 3c (portions with larger diameters) on the central side in the width direction are arranged, for example, in an underground space excavated below the installation surface BP.

[0023] In this case, when the installation surface 3c of the stator 3 is installed on the mounting surface BP, the rotor 4 cannot be inserted into the stator 3. For this reason, in such a rotating machine 2, as shown in Figures 1(a) and 1(b), the stator 3 is raised to a height where the rotor 4 can be inserted, and then the rotor 4 is inserted into the stator 3 from the side, and the raised stator 3 and rotor 4 are then lowered to the mounting surface BP, thereby installing the rotor 4 on the mounting surface BP.

[0024] A large rotating machine 2 is very heavy, and the total weight of the stator 3 and rotor 4 may exceed 100 tons. For this reason, the total weight of the stator 3 and rotor 4 exceeds the capacity of the lifting device 50, such as an overhead crane, and it may not be possible to lift the stator 3 and rotor 4 simultaneously with the lifting device 50.

[0025] Therefore, when the total weight of the stator 3 and rotor 4 exceeds the capacity of the lifting device 50, an installation method called a jack-down method is used to lower the elevated stator 3 and rotor 4 to the installation surface BP. More specifically, the installation assist device 10 assists in the installation of the rotating machine 2 onto the installation surface BP using the jack-down method. In other words, the installation assist device 10 assists in the work of lowering the elevated stator 3 and rotor 4 to the installation surface BP.

[0026] The installation assist device 10 includes a plurality of jacks 12 , a plurality of displacement meters 14 , and a control device 16 .

[0027] The multiple jacks 12 support the stator 3 and enable the height of the stator 3 to be adjusted. The multiple jacks 12 have, for example, a cylindrical main body, a movable part movably supported on the main body, and a drive part that moves the movable part based on an input of a control signal. The multiple jacks 12 change their overall length by changing the amount of protrusion of the movable part from the main body. The multiple jacks 12 can adjust the height of the stator 3 by changing the amount of protrusion of the movable part from the main body while supporting the stator 3. For example, journal jacks are used as the multiple jacks 12. However, the multiple jacks 12 are not limited thereto and may be any jacks that can appropriately support the stator 3 and appropriately adjust the height of the stator 3.

[0028] The stator frame 3b of the stator 3 has, for example, a plurality of receiving portions 3d for receiving support from a plurality of jacks 12. The receiving portions 3d are sometimes called, for example, jack bosses. The plurality of receiving portions 3d are provided at a height that allows the plurality of jacks 12 in a contracted state to be pulled out from between the mounting surface BP and the plurality of receiving portions 3d when the installation surface 3c of the stator frame 3b is in contact with the installation surface BP (when the stator 3 is lowered onto the installation surface BP). This allows the plurality of jacks 12 to be removed after the stator 3 and rotor 4 are lowered onto the installation surface BP.

[0029] The stator 3 has, for example, four receiving portions 3d provided near the four corners of the stator frame 3b. The installation auxiliary device 10 has, for example, four jacks 12 corresponding to the four receiving portions 3d, respectively, and supports the stator 3 with the four jacks 12. However, the number of jacks 12 and receiving portions 3d is not limited to four, and may be any number that allows the stator 3 to be appropriately supported by multiple jacks 12.

[0030] Furthermore, the stator 3 does not necessarily have to have multiple receiving portions 3d. The multiple jacks 12 may support the stator 3 via, for example, a dedicated jig. The method of supporting the stator 3 with the multiple jacks 12 is not limited to the above, and any method that can appropriately support the stator 3 may be used.

[0031] Furthermore, if the stroke of the multiple jacks 12 is insufficient for the height of the raised stator 3, as shown in Figures 1(a) and 1(b), the multiple jacks 12 support the receiving portion 3d of the stator 3 while placed on support materials 60, such as earth retaining materials. The rotor 4 is inserted into the stator 3, for example, by supporting the installation surface 3c of the stator 3 with another support material (not shown). For example, when switching from a state in which the installation surface 3c of the stator 3 is supported by another support material to a state in which the receiving portion 3d of the stator 3 is supported by the multiple jacks 12, the multiple jacks 12 support the receiving portion 3d of the stator 3 while placed on the stacked multiple support materials 60.

[0032] However, if the multiple jacks 12 have a sufficient stroke for the height of the stator 3 required to insert the rotor 4, the support material 60 does not necessarily have to be used. When switching from a state in which the stator 3 is supported by another support material to a state in which the stator 3 is supported by the multiple jacks 12, the multiple jacks 12 may support the receiving portion 3d of the stator 3 while being placed directly on the installation surface BP. Note that the stroke of the jack 12 is, in other words, the range of height adjustment by the jack 12. In other words, it is the amount by which the movable part of the jack 12 can move relative to the main body of the jack 12.

[0033] In this way, in the jack-down method, the stator 3 is supported by a plurality of jacks 12. The work of lowering the stator 3 to the installation surface BP is performed by a plurality of jacks 12. On the other hand, in the jack-down method, the rotor 4 is lifted up by a lifting device 50. The lifting device 50 lifts the rotor 4 and makes the height of the rotor 4 adjustable. The work of lowering the rotor 4 is performed by the lifting device 50.

[0034] The lifting device 50 is, for example, an overhead crane. The lifting device 50 is, for example, equipment provided in a building in which the rotating machine 2 is installed. The lifting device 50 lifts a lifting beam 54 via a wire rope 52, and by winding a wire rope 56 around the lifting beam 54 and the shaft 4b, the lifting device 50 lifts the rotor 4 via the wire rope 52, the lifting beam 54, and the wire rope 56. However, the configuration for lifting the rotor 4 by the lifting device 50 is not limited to this, and any configuration that can appropriately lift the rotor 4 may be used.

[0035] In the jack-down method, multiple jacks 12 are operated to lower the stator 3 by the amount of the gap between the stator 3 and the rotor 4. After this, the lifting device 50 is operated to lower the rotor 4 by the amount of the gap between the stator 3 and the rotor 4. By repeating this process alternately multiple times, the stator 3 and the rotor 4 are gradually lowered alternately until the installation surface 3c of the stator 3 comes into contact with the installation surface BP. This allows the raised stator 3 and rotor 4 to be lowered appropriately to the installation surface BP even if the total weight of the stator 3 and the rotor 4 exceeds the capacity of the lifting device 50.

[0036] The plurality of displacement gauges 14 measure the gap between the stator 3 and the rotor 4. In other words, the plurality of displacement gauges 14 measure the distance between the stator 3 and the rotor 4. More specifically, the plurality of displacement gauges 14 measure the gap between the stator body 3a and the rotor body 4a. When the rotor 4 is inserted into the stator 3, the gap between the rotor 4 (rotor body 4a) and the stator 3 (stator body 3a) is, for example, about 10 mm to 20 mm (e.g., 15 mm).

[0037] The plurality of displacement gauges 14 measure the gap at a plurality of locations between the stator 3 and the rotor 4. The plurality of displacement gauges 14 include, for example, a displacement gauge 14a that measures the gap between the upper end of the rotor 4 (rotor body 4a) and the stator 3 (stator body 3a), and a displacement gauge 14b that measures the gap between the lower end of the rotor 4 (rotor body 4a) and the stator 3 (stator body 3a).

[0038] When the jacks 12 are operated to lower the stator 3 while maintaining the height of the rotor 4, the gap between the upper end of the rotor 4 and the stator 3 narrows. Conversely, when the lifting device 50 is operated to lower the rotor 4 while maintaining the height of the stator 3, the gap between the lower end of the rotor 4 and the stator 3 narrows.

[0039] Therefore, as described above, a displacement meter 14a is provided to measure the gap between the upper end of the rotor 4 and the stator 3, and a displacement meter 14b is provided to measure the gap between the lower end of the rotor 4 and the stator 3. This makes it possible to properly check the gap between the stator 3 and the rotor 4 when the stator 3 and the rotor 4 are alternately lowered. For example, when the stator 3 and the rotor 4 are alternately lowered, it is possible to prevent the stator 3 and the rotor 4 from coming into contact with each other.

[0040] The plurality of displacement gauges 14 may include, for example, a plurality of displacement gauges 14a provided on both axial ends of the stator 3 to measure the gap between the upper end of the rotor 4 and the stator 3, and a plurality of displacement gauges 14b provided on both axial ends of the stator 3 to measure the gap between the lower end of the rotor 4 and the stator 3. This makes it possible to measure the inclination of the stator 3 and the rotor 4 in the axial direction. For example, when performing an operation in which the stator 3 and the rotor 4 are alternately lowered, it is possible to more appropriately check the gap between the stator 3 and the rotor 4. For example, when performing an operation in which the stator 3 and the rotor 4 are alternately lowered, it is possible to more appropriately prevent the stator 3 and the rotor 4 from coming into contact with each other.

[0041] The plurality of displacement gauges 14 further includes, for example, a displacement gauge 14c that measures the gap between one side end of the rotor 4 (rotor body 4a) and the stator 3 (stator body 3a), and a displacement gauge 14d that measures the gap between the other side end of the rotor 4 (rotor body 4a) and the stator 3 (stator body 3a). This makes it possible to check the lateral positional deviation between the stator 3 and the rotor 4. For example, when the stator 3 and the rotor 4 are alternately lowered, it is possible to more appropriately prevent the stator 3 and the rotor 4 from coming into contact with each other.

[0042] The plurality of displacement gauges 14 includes, for example, a plurality of one-side displacement gauges 14c provided at both axial ends of the stator 3, and a plurality of other-side displacement gauges 14d provided at both axial ends of the stator 3. This makes it possible to measure the inclination of the stator 3 and the rotor 4 on the side. For example, when the stator 3 and the rotor 4 are alternately lowered, the gap between the stator 3 and the rotor 4 can be more appropriately checked. For example, when the stator 3 and the rotor 4 are alternately lowered, contact between the stator 3 and the rotor 4 can be more appropriately prevented.

[0043] In this way, the installation auxiliary device 10 has a total of eight displacement gauges 14, for example, a pair of upper displacement gauges 14a provided on both axial ends of the stator 3, a pair of lower displacement gauges 14b provided on both axial ends of the stator 3, a pair of one-side displacement gauges 14c provided on both axial ends of the stator 3, and a pair of other-side displacement gauges 14d provided on both axial ends of the stator 3. This allows the work of lowering the stator 3 and rotor 4 to be carried out appropriately.

[0044] However, the number and arrangement of the multiple displacement gauges 14 are not limited to the above. The number and arrangement of the multiple displacement gauges 14 may be any number and any arrangement that allows the operation of lowering the stator 3 and the rotor 4 to be performed appropriately.

[0045] The multiple displacement gauges 14 measure, for example, the gap between the stator 3 and the rotor 4 in a non-contact manner. For example, laser displacement gauges are used as the multiple displacement gauges 14. This makes it possible to prevent the gap measurement by the multiple displacement gauges 14 from affecting the adjustment of the heights of the stator 3 and the rotor 4. The non-contact displacement gauge 14 may be, for example, an optical displacement gauge or an ultrasonic displacement gauge. However, the displacement gauge 14 is not limited to these and may be any displacement gauge that can appropriately measure the gap between the stator 3 and the rotor 4.

[0046] Furthermore, the plurality of displacement gauges 14 are attached to, for example, the stator 3. The plurality of displacement gauges 14, for example, measure the gap between the stator 3 and the rotor 4 in a non-contact manner while attached to the stator 3. The plurality of displacement gauges 14 are, for example, reflective laser displacement gauges with a light-emitting unit and a light-receiving unit provided on the stator 3 side. By providing the plurality of displacement gauges 14 on the stator 3 in this way, for example, it becomes easier to remove the plurality of displacement gauges 14 after the stator 3 and the rotor 4 have been lowered to the installation surface BP.

[0047] However, the multiple displacement gauges 14 may be provided on the rotor 4. For example, if the multiple displacement gauges 14 are laser displacement gauges, one of the light-emitting unit and the light-receiving unit may be provided on the stator 3, and the other of the light-emitting unit and the light-receiving unit may be provided on the rotor 4. In this way, some of the multiple displacement gauges 14 may be provided on the stator 3, and another part may be provided on the rotor 4. The multiple displacement gauges 14 may be configured in any way that is attached to at least one of the stator 3 and the rotor 4 and can appropriately measure the gap between the stator 3 and the rotor 4.

[0048] The control device 16 communicates with the plurality of displacement gauges 14 and receives input of measurement results from each of the plurality of displacement gauges 14. The control device 16 generates a plurality of control signals for controlling the operation of each of the plurality of jacks 12 based on the input measurement results of the plurality of displacement gauges 14. After generating the plurality of control signals, the control device 16 communicates with the plurality of jacks 12 and inputs the control signals corresponding to each of the plurality of jacks 12, thereby controlling the operation of each of the plurality of jacks 12. In this way, the control device 16 can automate the operation of the plurality of jacks 12 based on the measurement results of the plurality of displacement gauges 14.

[0049] FIG. 2 is a block diagram schematically illustrating a control device according to the embodiment. As shown in FIG. 2, the control device 16 includes an input unit 21, an output unit 22, a communication unit 23, a display unit 24, an operation unit 25, and a calculation unit 26.

[0050] The input unit 21 communicates with the plurality of displacement gauges 14 to receive input of measurement results from each of the plurality of displacement gauges 14. The input unit 21 inputs the input measurement results of the plurality of displacement gauges 14 to the calculation unit 26. Note that communication between the input unit 21 (control device 16) and the plurality of displacement gauges 14 may be wired or wireless.

[0051] The calculation unit 26 generates a plurality of control signals for controlling the operation of each of the plurality of jacks 12 based on the measurement results of the plurality of displacement meters 14 inputted, and inputs the generated plurality of control signals to the output unit 22.

[0052] The calculation unit 26 calculates, for example, based on the measurement results of the multiple displacement meters 14, the movement amounts of each of the multiple jacks 12 for keeping each of the multiple gaps between the stator 3 and the rotor 4 within a predetermined range. In other words, the movement amounts are the movement amounts of the movable parts of the jacks 12. The calculation unit 26 then generates control signals corresponding to the calculated movement amounts for each of the multiple jacks 12. In other words, the control signals are signals for moving the movable parts of the jacks 12 to desired positions corresponding to the movement amounts.

[0053] When the lifting device 50 is operated to lower the rotor 4 while maintaining the height of the stator 3, the gap between the lower end of the rotor 4 and the stator 3 narrows and the gap between the upper end of the rotor 4 and the stator 3 widens. Based on the measurement results of the multiple displacement gauges 14, when the gap between the lower end of the rotor 4 and the stator 3 becomes narrower than a predetermined range and the gap between the upper end of the rotor 4 and the stator 3 becomes wider than the predetermined range, the calculation unit 26 calculates the amount of operation of each jack 12 to bring each gap within the predetermined range. In this case, the calculation unit 26 calculates the amount of operation of each jack 12 to lower the stator 3 in accordance with the descent of the rotor 4.

[0054] When the stator 3 and the rotor 4 are arranged coaxially, as described above, the gap between the rotor 4 (rotor main body 4a) and the stator 3 (stator main body 3a) at each location is, for example, about 15 mm. In this case, the predetermined range is, for example, a range of 15 mm ± 2 mm. For example, when the gap between the lower end of the rotor 4 and the stator 3 is 12 mm and the gap between the upper end of the rotor 4 and the stator 3 is 18 mm, the calculation unit 26 calculates the amount of movement of each jack 12 required to lower the stator 3 by 3 mm. In other words, the calculation unit 26 calculates the amount of movement of each jack 12 required to shorten each jack 12 by 3 mm. The calculation unit 26 calculates the amount of movement of each jack 12 so as to return the jack 12 to the median value of the predetermined range, for example.

[0055] As a result, the control device 16 controls the operation of each jack 12 so as to synchronize with the amount and speed at which the lower clearance is reduced due to the descent of the rotor 4. In other words, the control device 16 controls the descent of the stator 3 so as to synchronize with the descent of the rotor 4 by the lifting device 50.

[0056] The predetermined range is not limited to the above, but may be any range that allows the stator 3 and the rotor 4 to be lowered appropriately and that can appropriately prevent contact between the stator 3 and the rotor 4. Furthermore, the method for calculating the operating amount of each jack 12 is not limited to the above, but may be any method that can appropriately calculate the operating amount of each jack 12.

[0057] The output unit 22 communicates with the multiple jacks 12 to input control signals corresponding to each of the multiple jacks 12. The output unit 22 inputs control signals to, for example, drive units of the jacks 12. The drive units of the multiple jacks 12 move their movable units in response to the input control signals. This makes it possible to control the operation of the multiple jacks 12 based on the control signals input from the control device 16. In other words, it is possible to adjust the height of the stator 3 based on the control signals input from the control device 16. Note that communication between the output unit 22 (control device 16) and the multiple jacks 12 may be wired or wireless.

[0058] The operation unit 25 receives input of operation instructions from a worker or the like, and inputs operation signals corresponding to the input operation instructions to the calculation unit 26. The operation unit 25 receives input of a plurality of operation instructions, such as, for example, an operation to manually raise and lower the stator 3, an operation to switch on / off the measurement of gaps by the plurality of displacement gauges 14, an operation to switch on / off the function to automate the operation of the plurality of jacks 12, and an operation to emergency stop the operation of the plurality of jacks 12 (movement of the stator 3), and inputs a plurality of operation signals corresponding to each of the plurality of operation instructions to the calculation unit 26. The operation unit 25 uses well-known input devices, such as, for example, a mouse, a keyboard, or a touch panel.

[0059] The calculation unit 26 executes an operation in accordance with an operation signal input from the operation unit 25. For example, when an operation signal for manually raising or lowering the stator 3 is input, the calculation unit 26 controls the operation of each jack 12 in accordance with the input operation signal, thereby raising or lowering the stator 3 in accordance with the operation signal. For example, when an operation signal for an emergency stop operation is input while the stator 3 is being moved, the calculation unit 26 stops the operation of each jack 12 in accordance with the input operation signal, thereby stopping the movement of the stator 3 in accordance with the operation signal. This makes it possible to operate each jack 12 based on the operation of the operation unit 25, for example, thereby further improving the convenience of the installation auxiliary device 10.

[0060] The display unit 24 displays information necessary for the work of lowering the stator 3 and the rotor 4. The display unit 24 is connected to, for example, the calculation unit 26. The display unit 24 displays information, for example, based on a signal input from the calculation unit 26. The display unit 24 displays, for example, information on the gap between the stator 3 and the rotor 4 measured by the multiple displacement gauges 14, information on the stroke lengths of the multiple jacks 12, and information on the operating status of the multiple jacks 12.

[0061] The information on the stroke length of the jack 12 is, in other words, information that indicates the amount of protrusion of the movable part of the jack 12 from the main body. The information on the stroke length of the jack 12 is, in other words, information that indicates the height of the stator 3 that can be adjusted by the jack 12. The information on the operating status of the jack 12 is, for example, information that indicates whether the jack 12 is operating or not, and the direction of the operation of the jack 12 (downward or upward).

[0062] This allows workers performing the work of lowering the stator 3 and rotor 4 to understand, by referring to the display on the display unit 24, the gaps measured by each displacement gauge 14, the remaining amount of height of the stator 3 that can be adjusted by each jack 12, etc. A well-known display device such as a liquid crystal display is used for the display unit 24. Note that the information displayed on the display unit 24 is not limited to the above, and any information necessary for the work of lowering the stator 3 and rotor 4 may be used.

[0063] The communication unit 23 communicates with the display device 30, thereby transmitting information necessary for the operation of lowering the stator 3 and the rotor 4 to the display device 30. The communication unit 23 is connected to, for example, the calculation unit 26. The communication unit 23 transmits information to the display device 30 based on, for example, a signal input from the calculation unit 26. The communication between the communication unit 23 and the display device 30 may be wired or wireless.

[0064] The communication unit 23 transmits to the display device 30 information similar to the information displayed on the display unit 24. The communication unit 23 transmits to the display device 30, for example, information on the gap between the stator 3 and the rotor 4 measured by the plurality of displacement gauges 14, information on the stroke lengths of the plurality of jacks 12, information on the operating status of the plurality of jacks 12, and the like.

[0065] The display device 30 is a display device for the operator of the lifting device 50. The display device 30 displays information received from the communication unit 23. This allows the operator of the lifting device 50 to understand the gaps measured by each displacement meter 14, the remaining amount of height of the stator 3 that can be adjusted by each jack 12, and the like.

[0066] The display device 30 may be a dedicated display device that displays only the information received from the communication unit 23, or may be a display device that is provided on the operation panel of the lifting device 50 and displays the information received from the communication unit 23 together with information related to the operation of the lifting device 50. The display device 30 may be, for example, a mobile terminal such as a smartphone owned by the operator of the lifting device 50. The display device 30 may be any display device that allows the operator of the lifting device 50 to appropriately refer to the information received from the communication unit 23.

[0067] The configuration of the control device 16 is not limited to the above, and may be any configuration that can generate a plurality of control signals for controlling the operation of each of the plurality of jacks 12 based on the measurement results of the plurality of displacement meters 14, and input the control signals corresponding to each of the plurality of jacks 12, thereby controlling the operation of each of the plurality of jacks 12.

[0068] FIG. 3 is a flowchart schematically illustrating an example of a method for installing a rotating machine using the installation assist device according to the embodiment. When installing the rotating machine 2 using the installation assist device 10, first, a preparation step is performed to enable installation of the rotating machine 2 using the installation assist device 10. For example, in this preparation step or in a step prior to the preparation step, the stator 3 and the rotor 4 of the rotating machine 2 are transported individually to the vicinity of the installation position.

[0069] In the preparation process, the rotor 4 is inserted into the stator 3. When inserting the rotor 4 into the stator 3, for example, the stator 3 is lifted using a lifting device 50 or the like, and the installation surface 3c of the stator 3 is supported by another support material (not shown), thereby raising the stator 3 to the height required for insertion of the rotor 4. After this, the rotor 4 is lifted using the lifting device 50, and inserted into the stator 3 from the side. After inserting the rotor 4 into the stator 3, the state in which the installation surface 3c of the stator 3 is supported by another support material is switched to a state in which the receiving portion 3d of the stator 3 is supported by multiple jacks 12. At this time, as described above, if the stroke of the multiple jacks 12 is insufficient for the height of the stator 3 required for insertion of the rotor 4, multiple support materials 60 are placed on the installation surface BP, and the multiple jacks 12 are placed on the multiple support materials 60.

[0070] After the receiving portion 3d of the stator 3 is supported by the multiple jacks 12, multiple displacement gauges 14 are attached to the stator 3 so that the gap between the stator 3 and the rotor 4 can be measured by the multiple displacement gauges 14. This completes the preparation for installing the rotating machine 2 using the installation auxiliary device 10. Note that, as described above, the multiple displacement gauges 14 may be attached to at least one of the stator 3 and the rotor 4 depending on the configuration of the multiple displacement gauges 14.

[0071] After the preparations as described above, measurement of the gap between the stator 3 and the rotor 4 is started by the plurality of displacement meters 14 (step S101 in FIG. 3). The plurality of displacement meters 14 measure the gap at a predetermined sampling period, for example, several times per second, and transmit the measurement result to the control device 16 every time a measurement is taken.

[0072] When the control device 16 receives measurement results from the multiple displacement gauges 14, it causes the calculation unit 26 to calculate the operating amount of each of the multiple jacks 12 based on the measurement results of the multiple displacement gauges 14, in order to keep each of the multiple gaps between the stator 3 and the rotor 4 within a specified range, and also causes the calculation unit 26 to generate control signals for each of the multiple jacks 12 according to the calculated operating amount.

[0073] In addition, when the control device 16 receives measurement results from the multiple displacement gauges 14, it displays information on the gap between the stator 3 and the rotor 4 measured by the multiple displacement gauges 14, information on the stroke lengths of the multiple jacks 12, and information on the operating status of the multiple jacks 12 on the display unit 24, and also displays each piece of information on the display device 30 by transmitting each piece of information to the display device 30 via the communication unit 23.

[0074] After starting measurement of the gap between the stator 3 and the rotor 4 using the multiple displacement meters 14, the lifting device 50 is operated to lower the rotor 4 at a distance and speed that will not cause it to come into contact with the stator 3 (step S102 in FIG. 3). At this time, by referring to the display device 30, the operator of the lifting device 50 can also grasp information about the gap between the stator 3 and the rotor 4 and information about the stroke lengths of the multiple jacks 12. This makes it easier to adjust the distance and speed at which the rotor 4 is lowered.

[0075] When the rotor 4 is lowered and the gap between the lower end of the rotor 4 and the stator 3 becomes narrower than a predetermined range and the gap between the upper end of the rotor 4 and the stator 3 becomes wider than the predetermined range, the calculation unit 26 calculates the amount of movement of each jack 12 to bring each gap within the predetermined range. Then, a control signal corresponding to the amount of movement is generated by the calculation unit 26, and the generated control signal is input from the control device 16 to each of the plurality of jacks 12 via the output unit 22, thereby controlling the movement of each jack 12. In this way, the movement of each jack 12 is automatically controlled in response to the descent of the rotor 4, and the stator 3 also descends in response to the descent of the rotor 4 (step S103 in FIG. 3).

[0076] The control device 16 (calculation unit 26) controls the amount of movement and the speed of movement of each jack 12 so that the gaps between the stator 3 and the rotor 4 are not biased, and lowers the stator 3 in synchronization with the descent of the rotor 4.

[0077] After the descent of the stator 3 and the rotor 4 has begun, the worker installing the rotating machine 2 determines whether or not the stroke of at least one of the jacks 12 has reached its lower limit based on the information about the stroke lengths of the jacks 12 displayed on the display unit 24. Similarly, after the descent of the stator 3 and the rotor 4 has begun, the operator operating the lifting device 50 determines whether or not the stroke of at least one of the jacks 12 has reached its lower limit based on the information about the stroke lengths of the jacks 12 displayed on the display unit 30 (step S104 in FIG. 3). Note that a worker who can get close to the jacks 12 may determine whether or not the stroke has reached its lower limit by, for example, visually inspecting the jacks 12.

[0078] If none of the jacks 12 has reached the lower limit of its stroke, the worker or operator determines whether the installation surface 3c of the stator 3 has landed on the installation surface BP (step S105 in FIG. 3). The determination of whether the stator 3 has landed on the installation surface BP is made, for example, by visual inspection.

[0079] If the stator 3 has not landed on the installation surface BP, the process returns to step S101, and the processes of steps S101 to S105 are repeatedly executed to lower the rotor 4 and the stator 3 in synchronization therewith. If the stator 3 has landed on the installation surface BP, the installation work of the rotating machine 2 using the installation auxiliary device 10 is completed.

[0080] If any of the plurality of jacks 12 reaches the lower limit of its stroke before the stator 3 lands on the installation surface BP, the support members 60 are rearranged (step S106 in FIG. 3).

[0081] When the worker determines that one of the multiple jacks 12 has reached the lower limit of its stroke, he or she begins work to rearrange the support material 60. At this time, the worker can check information about the stroke lengths of the multiple jacks 12 on the display unit 24. This allows the worker to start work to rearrange the support material 60 at the optimal timing.

[0082] Furthermore, the operator of the lifting device 50 stops the descent of the rotor 4 by the lifting device 50 in response to determining that any of the multiple jacks 12 has reached the lower limit of its stroke. At this time, the operator of the lifting device 50 can also check information on the stroke lengths of the multiple jacks 12 on the display device 30, making it easier to understand the timing to stop the descent of the rotor 4. For example, it is possible to prevent the need for a sudden operation when stopping the descent of the rotor 4. For example, it is possible to gradually stop the descent of the rotor 4 by gradually reducing the amount of movement of the descent of the rotor 4 or gradually slowing down the speed of the descent of the rotor 4.

[0083] When rearranging the support members 60, another support member (not shown) is used to temporarily support the installation surface 3c of the stator 3. The other support member is prepared in advance around the installation position so as to support the installation surface 3c of the stator 3 in place of the multiple jacks 12, for example, just before any of the multiple jacks 12 reaches the lower limit of its stroke.

[0084] When the worker starts the work of rearranging the support materials 60, he or she switches off the automation function for the operation of the multiple jacks 12, for example, by operating the operation unit 25. The worker supports the installation surface 3c of the stator 3 with another support material, and with the automation function for the operation of the multiple jacks 12 switched off, the worker removes the multiple jacks 12 once and also removes the multiple support materials 60. If the multiple support materials 60 are stacked in multiple layers, a predetermined number of support materials 60 corresponding to the strokes of the multiple jacks 12 are removed from the stacked multiple support materials 60.

[0085] The worker removes at least some of the multiple support materials 60 and repositions the multiple jacks 12 in a lowered state. Then, the worker operates the operating unit 25 or another operating unit provided on the jacks 12 to move the movable parts of the multiple jacks 12 to near the upper limit of their strokes. This switches the state where the installation surface 3c of the stator 3 is supported by the other support materials back to a state where the receiving portion 3d of the stator 3 is supported by the multiple jacks 12. After the stator 3 is supported by the multiple jacks 12, the other support materials are either removed or the number of stages is reduced in preparation for the next rearrangement work.

[0086] After the worker supports the stator 3 again with the multiple jacks 12, he or she operates the operating unit 25 to switch on the function for automating the operation of the multiple jacks 12. This completes the rearrangement of the support material 60, and it becomes possible to lower the stator 3 again in synchronization with the descent of the rotor 4.

[0087] In this way, when installing the rotating machine 2 using the jack-down method, in which the stator 3 is raised to a height where the rotor 4 can be inserted, the rotor 4 is inserted into the stator 3 using the lifting device 50, the stator 3 is supported by multiple jacks 12, and then the stator 3 and rotor 4 are lowered using the multiple jacks 12 and the lifting device 50 from the height required to insert the rotor 4 to the installation surface BP, the control device 16 calculates the amount of movement of each of the multiple jacks 12 based on the measurement results of the multiple displacement meters 14, in order to keep each of the multiple gaps between the stator 3 and the rotor 4 within a specified range, generates control signals for each of the multiple jacks 12 according to the amount of movement, inputs control signals corresponding to each of the multiple jacks 12, and controls the operation of each of the multiple jacks 12, thereby lowering the stator 3 in accordance with the descent of the rotor 4 by the lifting device 50.

[0088] For example, one known installation method for a rotating machine 2 involves using a lifting device 50 to lower the rotor 4 until the bottom end of the rotor 4 is about to contact the stator 3, and then having multiple workers operate multiple jacks 12 to lower the stator 3 until the top end of the rotor 4 is about to contact the stator 3. This installation method requires that clearances be measured periodically to prevent contact between the stator 4 and the rotor 4, requiring the work to be stopped each time. Furthermore, since the workers must measure the top and bottom gaps on the front and rear surfaces of the stator 3, the gap measurement also takes a lot of time. The stator 3 and rotor 4 must be lowered by a few millimeters at a time to match the gap dimensions, and the above operation must be repeated many times, making this a mentally and physically demanding task for the workers.

[0089] In contrast, the installation auxiliary device 10 according to this embodiment and the method for installing a rotating machine 2 using the same use multiple displacement gauges 14 to measure the gap between the stator 3 and the rotor 4 in real time and automatically control the operation of multiple jacks 12. This eliminates the need to stop the operation each time a gap is measured. For example, it becomes possible to perform work for the strokes of multiple jacks 12 continuously without stopping the work. This significantly reduces the work time. For example, it is no longer necessary to stop the work every few millimeters to repeat the process of measuring the gap, thereby reducing the mental burden on the worker and the work time.

[0090] Furthermore, by calculating the amount of movement of the multiple jacks 12, the stator 3 and the rotor 4 can be lowered or raised while always maintaining an appropriate gap. For example, by automating the movement of the multiple jacks 12 based on information about the measured gap, the operation of the multiple jacks 12 and the resulting variation in the heights of the multiple jacks 12 can be reduced compared to when multiple workers manually operate each of the multiple jacks 12, and the stator 3 and rotor 4 can be lowered while always maintaining a stable gap. This prevents contact between the stator 3 and rotor 4 and also reduces damage to the rotating machine 2.

[0091] Furthermore, by sharing information about the measured gap with the operator of the lifting device 50, it is possible to more appropriately prevent equipment contact and damage, and achieve on-site construction that maintains higher quality. For the operator who operates the lifting device 50, repeating operations of a few millimeters without causing collisions is also a mentally stressful task, but by visualizing the gap, the operator can grasp the state of the load and the timing to stop, which significantly reduces the mental stress.

[0092] As described above, with the installation auxiliary device 10 according to this embodiment and the method for installing the rotating machine 2 using the same, the installation of the rotating machine 2 can be performed more simply and in a shorter time.

[0093] In the above embodiment, the lifting device 50 is manually operated by an operator. For example, if the lifting device 50 is configured to be controllable based on an external input signal, the operation of the lifting device 50 may be controlled by the control device 16 by generating a control signal in the calculation unit 26 for lowering or raising the rotor 4 at a predetermined movement amount and speed, and inputting the generated control signal to the lifting device 50 via the communication unit 23. This reduces the effort required for the operator to operate the lifting device 50, and allows the rotating machine 2 to be installed more easily and in a shorter time.

[0094] The present embodiment includes the following aspects. (Appendix 1) An installation assist device for a rotating machine that assists in installation of a rotating machine, the rotating machine including a cylindrical stator and a rotor that is inserted into the stator and rotatably supported, the rotating machine being installed in a state in which portions of the stator and the rotor protrude below an installation surface, a plurality of jacks that support the stator and allow the height of the stator to be adjusted; a plurality of displacement meters for measuring the gap between the stator and the rotor; a control device that generates a plurality of control signals for controlling the operation of each of the plurality of jacks based on the measurement results of the plurality of displacement meters, and controls the operation of each of the plurality of jacks by inputting the control signals corresponding to each of the plurality of jacks; Equipped with When installing the rotating machine using a jack-down method in which the stator is raised to a height where the rotor can be inserted, the rotor is inserted into the stator using a lifting device, the stator is supported by the multiple jacks, and then the stator and the rotor are lowered to the installation surface using the multiple jacks and the lifting device, the control device calculates the amount of movement of each of the multiple jacks based on the measurement results of the multiple displacement meters to keep each of the multiple gaps between the stator and the rotor within a predetermined range, generates the control signal for each of the multiple jacks according to the amount of movement, inputs the control signal corresponding to each of the multiple jacks, and controls the operation of each of the multiple jacks, thereby lowering the stator in accordance with the descent of the rotor by the lifting device.

[0095] (Appendix 2) 2. The rotating machine installation assist device according to claim 1, wherein the control device has a display unit that displays information about the gap between the stator and the rotor measured by the plurality of displacement meters and information about stroke lengths of the plurality of jacks.

[0096] (Appendix 3) 3. An installation auxiliary device for a rotating machine according to claim 1, further comprising a communication unit that communicates with a display device for an operator of the lifting device to transmit information about the gap between the stator and the rotor measured by the plurality of displacement meters and information about the stroke lengths of the plurality of jacks to the display device.

[0097] (Appendix 4) 4. The rotating machine installation auxiliary device according to claim 1, wherein the plurality of displacement gauges measure the gap between the stator and the rotor in a non-contact manner.

[0098] (Appendix 5) 5. The rotating machine installation auxiliary device according to claim 4, wherein the plurality of displacement gauges are attached to the stator.

[0099] (Appendix 6) 6. The installation auxiliary device for a rotating machine according to any one of appendices 1 to 5, wherein the plurality of displacement meters include a displacement meter that measures a gap between an upper end of the rotor and the stator, and a displacement meter that measures a gap between a lower end of the rotor and the stator.

[0100] (Appendix 7) The plurality of displacement meters include a plurality of displacement meters provided on both axial ends of the stator to measure a gap between the upper end of the rotor and the stator; a plurality of displacement meters provided on both ends of the stator in the axial direction to measure a gap between the lower end of the rotor and the stator; 6. An installation auxiliary device for a rotating machine according to any one of appendices 1 to 5, comprising:

[0101] (Appendix 8) A method for installing a rotating machine on an installation surface, the rotating machine comprising: a cylindrical stator; and a rotor inserted into the stator and rotatably supported therein; the rotating machine being installed in a state in which portions of the stator and the rotor protrude below an installation surface, the method comprising: When installing the rotating machine by a jack-down method in which the stator is raised to a height where the rotor can be inserted, the rotor is inserted into the stator using a lifting device, the stator is supported by a plurality of jacks, and then the stator and the rotor are lowered to the installation surface using the plurality of jacks and the lifting device, a gap between the stator and the rotor is measured using a plurality of displacement meters; a control device calculates the amount of movement of each of the plurality of jacks to keep each of the plurality of gaps between the stator and the rotor within a predetermined range based on the measurement results of the plurality of displacement meters, and generates the control signal for each of the plurality of jacks according to the amount of movement; A method for installing a rotating machine, comprising inputting the control signal corresponding to each of the plurality of jacks from the control device to each of the plurality of jacks and controlling the operation of each of the plurality of jacks, thereby lowering the stator in accordance with the descent of the rotor by the lifting device.

[0102] Although several embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be embodied in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included within the scope and spirit of the invention, and are also included in the scope of the invention and its equivalents as defined in the claims. [Explanation of symbols]

[0103] DESCRIPTION OF SYMBOLS 2...Rotating machine, 3...Stator, 4...Rotor, 10...Installation auxiliary device, 12...Jack, 14...Displacement meter, 16...Control device, 21...Input section, 22...Output section, 23...Communication section, 24...Display section, 25...Operation section, 26...Calculation section, 30...Display device, 50...Lifting device, 52...Wire rope, 54...Lifting beam, 56...Wire rope, 60...Support material, BP...Installation surface

Claims

1. An installation assist device for a rotating machine that assists in installation of a rotating machine, the rotating machine including a cylindrical stator and a rotor that is inserted into the stator and rotatably supported, the rotating machine being installed in a state in which portions of the stator and the rotor protrude below an installation surface, a plurality of jacks that support the stator and allow the height of the stator to be adjusted; a plurality of displacement meters for measuring the gap between the stator and the rotor; a control device that generates a plurality of control signals for controlling the operation of each of the plurality of jacks based on the measurement results of the plurality of displacement meters, and controls the operation of each of the plurality of jacks by inputting the control signals corresponding to each of the plurality of jacks; Equipped with When installing the rotating machine using a jack-down method in which the stator is raised to a height where the rotor can be inserted, the rotor is inserted into the stator using a lifting device, the stator is supported by the multiple jacks, and then the stator and the rotor are lowered to the installation surface using the multiple jacks and the lifting device, the control device calculates the amount of movement of each of the multiple jacks based on the measurement results of the multiple displacement meters to keep each of the multiple gaps between the stator and the rotor within a predetermined range, generates the control signal for each of the multiple jacks according to the amount of movement, inputs the control signal corresponding to each of the multiple jacks, and controls the operation of each of the multiple jacks, thereby lowering the stator in accordance with the descent of the rotor by the lifting device.

2. 2. The rotating machine installation assist device according to claim 1, wherein the control device has a display unit that displays information on the gap between the stator and the rotor measured by the plurality of displacement meters and information on the stroke lengths of the plurality of jacks.

3. 2. The rotating machine installation assist device according to claim 1, further comprising a communication unit that communicates with a display device for an operator of the lifting device to transmit information about the gap between the stator and the rotor measured by the plurality of displacement meters and information about the stroke lengths of the plurality of jacks to the display device.

4. 2. The rotary machine installation assistance device according to claim 1, wherein the plurality of displacement gauges measure the gap between the stator and the rotor in a non-contact manner.

5. 5. The rotary machine installation assistance device according to claim 4, wherein the plurality of displacement gauges are attached to the stator.

6. 2. The rotary machine installation assistance device according to claim 1, wherein the plurality of displacement gauges include a displacement gauge that measures a gap between an upper end of the rotor and the stator, and a displacement gauge that measures a gap between a lower end of the rotor and the stator.

7. The plurality of displacement meters include a plurality of displacement meters provided on both axial ends of the stator to measure a gap between the upper end of the rotor and the stator; a plurality of displacement meters provided on both ends of the stator in the axial direction to measure a gap between the lower end of the rotor and the stator; 2. The rotary machine installation assist device according to claim 1, further comprising:

8. A method for installing a rotating machine on an installation surface, the rotating machine comprising: a cylindrical stator; and a rotor inserted into the stator and rotatably supported therein; the rotating machine being installed in a state in which portions of the stator and the rotor protrude below an installation surface, the method comprising: When installing the rotating machine by a jack-down method in which the stator is raised to a height where the rotor can be inserted, the rotor is inserted into the stator using a lifting device, the stator is supported by a plurality of jacks, and then the stator and the rotor are lowered to the installation surface using the plurality of jacks and the lifting device, a gap between the stator and the rotor is measured using a plurality of displacement meters; a control device calculates the amount of movement of each of the plurality of jacks to keep each of the plurality of gaps between the stator and the rotor within a predetermined range based on the measurement results of the plurality of displacement meters, and generates the control signal for each of the plurality of jacks according to the amount of movement; A method for installing a rotating machine, comprising inputting the control signal corresponding to each of the plurality of jacks from the control device to each of the plurality of jacks and controlling the operation of each of the plurality of jacks, thereby lowering the stator in accordance with the descent of the rotor by the lifting device.

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