Vertical shaft water turbine power generation machine installation method

Abstract

To provide a method for installing a vertical shaft water turbine power generator, enabling a structure to be easily and highly accurately centered.SOLUTION: A method of installing a vertical shaft water turbine power generator having a water wheel installed on a water wheel floor base concrete and an electric generator installed on an electric generator floor base concrete, includes: a lower cover installation step S10 of installing a lower cover on the water wheel floor base concrete; a central axis derivation step S20 of deriving an installation central axis by acquiring a center point of a lower cover center point of an installed lower cover; a transference step S30 of calculating a coordinate of a target mark installed on the water wheel floor base concrete and the electric generator floor base concrete on the basis of the installation central axis; and each member installation step S200 of positioning a center position of each member which has to be installed above the lower cover on the basis of information of a target mark in such a manner that the centers of each of the members are positioned on the installation central axis, then installing the members in sequence.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] An embodiment of the present invention relates to an installation method for a vertical shaft water turbine generator. [Background technology]

[0002] In general, when installing a vertical shaft water turbine generator, in which the generator rotor is directly connected above the water turbine runner and the rotating parts are supported by multiple bearings, it is necessary to center the rotating and stationary parts that make up the vertical shaft water turbine generator. Here, the stationary parts of the vertical shaft water turbine generator include, for example, the upper and lower covers of the water turbine, and the upper blanket and lower bracket of the generator.

[0003] Centering is performed to align the centers of the rotating and stationary parts of the machine. If centering is not performed properly, it may lead to problems such as vibrations and abnormal runout of the rotating body.

[0004] Conventionally, centering has been performed by a piano wire centering method. Fig. 13 is an elevational sectional view for explaining a conventional installation method for a vertical shaft water turbine generator 30.

[0005] In the vertical shaft water turbine generator 30, the water turbine 10 is first installed on the water turbine floor concrete foundation 1, and then the generator 20 is installed on the generator floor concrete foundation 2. The casing 11 and speed ring 12 are also embedded in the water turbine floor concrete foundation 1. The water turbine and the generator are generally installed by sequentially installing each component, starting from the one located at the bottom.

[0006] Centering is performed prior to the installation of each of these components. That is, first, each component of the stationary section is installed as shown in Fig. 13. Specifically, from below, the lower cover 13 and the upper cover 14 of the turbine 10 are installed at respective height positions lower than the turbine floor 1a of the turbine floor foundation concrete 1.

[0007] In addition, the turbine bearing support 15 is installed on the upper cover 14. In addition, the lower bracket 21 of the generator 20 is installed on the generator floor foundation concrete 2, the stator 22 stored in the frame 23 is installed on the generator floor 2a, and further the upper bracket 24 is installed on the frame 23.

[0008] Next, as a guide for the axial center of the rotor, a piano wire 60 with a weight 61 attached to its lower end is hung from the center position of inner peripheral surface 24a of upper bracket 24. Next, the positions of the other stationary members are adjusted so that the hung piano wire 60 is at the center.

[0009] Specifically, for the water turbine 10, three or more reference points are determined on the inner peripheral surfaces of the lower cover inner peripheral surface 13a of the lower cover 13, the upper cover inner peripheral surface 14a of the upper cover 14, and the water turbine bearing support inner peripheral surface 15a of the water turbine bearing support 15, and the distance between each reference point and the piano wire 60 is measured by a measuring means such as a micrometer. Based on the measurement results, the position of each stationary part is adjusted so that each measured distance has the same value.

[0010] Similarly, for the generator 20, the distance between each reference point on the inner surface and the piano wire 60 is measured for each of the lower bracket inner surface 21a of the lower bracket 21 and the stator inner surface 22a of the stator 22, and based on the measurement results, the position of each stationary part is adjusted so that the measured distances become the same value. [Prior art documents] [Patent documents]

[0011] [Patent Document 1] Patent No. 6416011 Summary of the Invention [Problem to be solved by the invention]

[0012] In the case of the conventional piano wire centering method described above, after centering is completed, all components other than the lowest bottom cover 13 are removed, and the stationary and rotating components are successively carried in from above and installed from bottom to top.

[0013] For this reason, each stationary part removed after centering must be stored on-site until it is required by the installation procedure, and storage space must be secured for this storage.

[0014] In addition, in the case of the conventional piano wire method, the distance is measured using a measuring tool such as a micrometer, which requires skill from the worker and is prone to measurement errors. Furthermore, the distance from the upper bracket to the top end of the water turbine main shaft is often as long as 10 meters, and the piano wire is prone to vibrating in the wind, which poses a challenge in centering, which requires precision.

[0015] An object of the present invention is to provide an installation method for a vertical shaft water turbine generator that enables centering of a structure easily and with high accuracy. [Means for solving the problem]

[0016] According to an embodiment, the installation method of the vertical shaft water turbine generator includes: A method for installing a vertical shaft water turbine generator having a water turbine, which includes a bottom cover, a runner, a guide vane, and a top cover, and is installed on a concrete foundation of a water turbine floor, and a generator, which includes a bottom bracket, a stator, a frame, and a top bracket, and is installed on a concrete foundation of a generator floor, the method comprising the steps of: installing the bottom cover on the concrete foundation of the water turbine floor; determining a center point of an inner peripheral surface of the bottom cover installed in the bottom cover installation step, and deriving an installation center axis; and determining a center point of the bottom cover on the concrete foundation of the water turbine floor and the generator floor based on the installation center axis. The method includes a transfer step of calculating coordinates of a target mark placed on the foundation concrete, and a member installation step of positioning each of the members to be installed above the lower cover so that its center position is on the installation central axis based on the information of the target mark and sequentially installing the members, the transfer step including a step of placing the target mark on the turbine floor foundation concrete and the generator floor foundation concrete, a step of measuring the position of the target mark, and a step of converting the coordinates of the position of the target mark into coordinates based on the installation central axis. and [Brief description of the drawings]

[0017] [Figure 1] 1 is an elevational sectional view showing an example of the configuration of a vertical shaft water turbine generator that is a target of an installation method for a vertical shaft water turbine generator according to an embodiment. FIG. [Diagram 2] FIG. 2 is a flow chart showing the procedure of an installation method for a vertical shaft water turbine generator according to an embodiment. [Diagram 3] FIG. 11 is a flow chart showing detailed procedures of a step for setting an installation center axis based on an installation position of a bottom cover in an installation method for a vertical shaft water turbine generator according to an embodiment. [Figure 4]FIG. 11 is a partial vertical cross-sectional view showing the arrangement of a laser receiving pointer in a step of setting the installation center axis based on the installation position of the lower cover in the installation method for the vertical shaft water turbine generator according to the embodiment. [Diagram 5] FIG. 11 is a partial plan view showing the arrangement of a laser receiving pointer in a step of setting the installation center axis based on the installation position of the bottom cover in the installation method for the vertical shaft water turbine generator according to the embodiment. [Figure 6] FIG. 11 is a perspective view showing measurement of the position of a laser receiving pointer in a step of setting the installation center axis based on the installation position of the bottom cover in the installation method for the vertical shaft water turbine generator according to the embodiment. [Figure 7] FIG. 11 is a plan view showing the positioning of a laser receiving pointer in a step of setting the installation center axis based on the installation position of the bottom cover in the installation method for the vertical shaft water turbine generator according to the embodiment. [Figure 8] FIG. 4 is a plan view for explaining derivation of an installation center axis based on the installation position of a bottom cover in an installation method for a vertical shaft water turbine generator according to an embodiment. [Figure 9] FIG. 11 is a flow chart showing detailed procedures of a step of placing a target mark on a building side and transferring installation center axis information in the installation method for a vertical shaft water turbine generator according to an embodiment. [Figure 10] FIG. 11 is a plan view for explaining the transfer of installation central axis information to a target mark on a building side in the installation method of the vertical shaft water turbine generator according to the embodiment. [Figure 11] FIG. 4 is a flow chart showing detailed procedures of a stator installation step in the installation method for the vertical shaft water turbine generator according to the embodiment. [Figure 12] FIG. 2 is a cross-sectional plan view for explaining a stator installation step in the installation method for the vertical shaft water turbine generator according to the embodiment. [Figure 13] FIG. 1 is an elevational sectional view for explaining a conventional installation method for a vertical shaft water turbine generator. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] Hereinafter, a machine installation method for a vertical shaft water turbine power generation system according to an embodiment of the present invention will be described with reference to the drawings. Hereinafter, the same or similar parts will be denoted by the same reference numerals, and duplicated explanations will be omitted.

[0019] FIG. 1 is an elevational sectional view showing an example of the configuration of a vertical shaft water turbine generator which is a target of an installation method for a vertical shaft water turbine generator according to an embodiment.

[0020] The vertical shaft water turbine generator 30 has a water turbine 10 installed on a concrete foundation 1 of the water turbine floor, and a generator 20 installed on a concrete foundation 2 of the generator floor.

[0021] The turbine 10 has a lower cover 13 , an upper cover 14 , a runner 16 , a turbine rotor shaft 17 , guide vanes 18 , and a turbine bearing support base 15 .

[0022] The runner 16 is sandwiched between the lower cover 13 and the upper cover 14 in the vertical direction.

[0023] A plurality of guide vanes 18 are provided in the circumferential direction in the flow passage between the speed ring 12 and the runner 16. Each guide vane 18 is rotatably supported by its rotation shaft on the lower cover 13 and the upper cover 14. All the guide vanes 18 are driven by a connecting mechanism so as to open and close simultaneously to the same degree of opening, thereby controlling the flow rate of the working fluid to the runner.

[0024] The water turbine rotor shaft 17 is directly connected to the runner 16. A rotating portion of a water turbine bearing 19 is attached to the water turbine rotor shaft 17. The water turbine bearing 19 is supported by the water turbine bearing support base 15 so as to be rotatable while being restrained from horizontal displacement.

[0025] The generator 20 has a generator rotor shaft 25, a rotor 26 attached to the generator rotor shaft 25, a stator 22 arranged radially outside the rotor 26 so as to surround the rotor 26, a frame 23 that houses the stator 22, and a lower bearing 27 and an upper bearing 28 that rotatably support the generator rotor shaft 25. The upper bearing 28 has a thrust bearing and a radial bearing (not shown), and the lower bearing 27 has a radial bearing (not shown). The lower bearing 27 and the upper bearing 28 are supported by the lower bracket 21 and the upper bracket 24, respectively.

[0026] In order to transmit the rotational torque of the water turbine 10 to the generator 20 , the water turbine rotor shaft 17 and the generator rotor shaft 25 are coupled by a coupling 31 .

[0027] The runner 16, the water turbine rotor shaft 17, the generator rotor shaft 25 and the rotor 26 are integrally supported rotatably by the water turbine bearing 19, the lower bearing 27 and the upper bearing 28.

[0028] The runner 16 rotates by receiving water, which is a working fluid, that flows circumferentially inward from a casing 11 embedded circumferentially in the turbine floor foundation concrete 1 through a speed ring 12, and discharges the water downward after it has completed its work.

[0029] FIG. 2 is a flow diagram showing the procedure of the installation method of the vertical shaft water turbine generator 30 according to the embodiment.

[0030] As a prerequisite for starting installation of the vertical shaft water turbine generator 30, the turbine floor foundation concrete 1 and the generator floor foundation concrete 2 are assumed to have already been poured, and the casing 11 and the speed ring 12 are assumed to have been installed in the turbine floor foundation concrete 1.

[0031] First, the bottom cover 13 is installed (step S10). That is, the bottom cover 13 is installed and fixed on the turbine floor foundation concrete 1 at a position lower than the turbine floor 1a of the turbine floor foundation concrete 1, using the turbine floor foundation concrete 1 as a base.

[0032] Next, an installation central axis L0 is derived based on the position of the bottom cover 13 (step S20). That is, by deriving the center position of the bottom cover inner circumferential surface 13a of the installed and fixed bottom cover 13, an installation central axis L0 (see FIG. 7) serving as a reference for centering the entire vertical shaft water turbine generator 30 is derived.

[0033] Furthermore, a plurality of target marks 55 (see FIG. 10) are placed on each of the turbine floor foundation concrete 1 and the generator floor foundation concrete 2, and central position information is transferred to the target marks 55 (step S30). Details of steps S20 and S30 will be described later, but part of step S30 is performed in parallel with step S20.

[0034] Thereafter, the members to be installed that are disposed above the lower cover 13 are installed in order from the bottom side (step S200). Each step of the member installation step S200 will be described below in order.

[0035] In these installations, centering is performed by determining the center position based on the target mark 55. Note that centering based on the target mark 55 will be explained in detail later, but here, the overall installation procedure will be explained first.

[0036] First, the runner 16 and the guide vanes 18 are installed (step S40). The runner 16 is installed in a state where it is coupled to the water turbine rotor shaft 17. Next, the upper cover 14 is installed (step S50). The guide vane 18 is installed so that its rotation axis is supported rotatably by the lower cover 13 and the upper cover 14 while being sandwiched between them, and therefore steps S40 and S50 are performed partly in parallel with each other as necessary.

[0037] Next, the water turbine bearing support 15 is installed (step S60). The water turbine bearing support 15 is installed on the upper cover 14.

[0038] The installation of each of the runner 16, guide vanes 18, upper cover 14 and turbine bearing support base 15 is carried out based on the information from the target marks 55 provided on the turbine floor foundation concrete 1 so that the center of each of the inner or outer surfaces is aligned on the installation central axis L0.

[0039] Next, the lower bracket 21 is installed (step S70). The installation of the lower bracket 21 is performed based on the information of the target mark 55 provided on the generator floor foundation concrete 2 so that the center of the lower bracket inner peripheral surface 21a of the lower bracket 21 is aligned on the installation central axis L0.

[0040] Next, the stator 22 is installed on the generator floor 2a (step S80). The details of step S80 will be described later.

[0041] Next, the rotor 26 is installed (step S90). The rotor 26 is installed integrally with the lower bearing 27 in a state where it is attached to the generator rotor shaft 25. That is, the lower bearing 27 is inserted into the lower bracket 21, and the rotor 26 is inserted into the stator 22.

[0042] Furthermore, the upper bracket 24 is installed (step S100). The upper bracket 24 is installed so that the center of the upper bracket 24 is on the installation central axis L0, based on information from the target mark 55 provided on the generator floor foundation concrete 2. After the upper bracket 24 is installed, the upper bearing 28 is attached to the generator rotor shaft 25. By attaching the upper bearing 28, the rotor 26, the generator rotor shaft 25, the lower bearing 27 and the upper bearing 28 are integrated, and the rotating portion of the generator 20 is positioned.

[0043] Incidentally, even during installation, in order to support the vertical load of the integrated rotor 26 and generator rotor shaft 25 by the thrust bearing, parts of step S90 and step S100 may be performed in parallel.

[0044] Next, the lower end of the generator rotor shaft 25 and the upper end of the water turbine rotor shaft 17 are joined to form the coupling 31 (step S110).

[0045] FIG. 3 is a flow chart showing detailed procedures of step S20 for deriving the installation central axis L0 based on the installation position of the bottom cover 13 in the installation method for the vertical shaft water turbine generator according to the embodiment.

[0046] Step S20 includes a step of measuring the position of the lower cover 13 (step S21) and a step of calculating the center position (step S22).

[0047] Figure 4 is a partial vertical cross-sectional view showing the arrangement of the laser receiving pointer 52 in the setting step of the installation center axis L0 based on the installation position of the lower cover 13 in the installation method of the vertical shaft water turbine generator of the embodiment, and Figure 5 is a partial plan view showing the arrangement of the laser receiving pointer.

[0048] In the step of measuring the position of the lower cover 13 (step S21), first, the laser receiving pointer 52 is placed on the inner peripheral surface 13a of the lower cover (step S21a). Note that in this step S21, setting of a target mark 55 and position measurement, which will be described later, are performed in parallel in step S30.

[0049] 4 and 5, the laser receiving pointer 52 is disposed on the inner peripheral surface 13a of the lower cover so that its light receiving side faces the direction of the laser tracker 51. The laser receiving pointer 52 may be pressed by the operator's hand against the inner peripheral surface 13a of the lower cover.

[0050] Next, the position of the laser beam receiving pointer 52 is measured (step S21b).

[0051] FIG. 6 is a perspective view showing measurement of the position of the laser receiving pointer in setting step S20 of the installation central axis L0 based on the installation position of the bottom cover 13 in the installation method for the vertical shaft water turbine generator according to the embodiment.

[0052] By transmitting and receiving a laser beam from the laser tracker 51 to the laser receiving pointer 52, the distance L between the laser tracker 51 and the laser receiving pointer 52 is acquired (from the round-trip distance of laser transmission and reception, 2L). At this time, the position of the laser transmitter is set as the origin, and the laser transmission direction is expressed as a vector coordinate system with an angle Θ from the x-axis in the horizontal direction, i.e., on the xy plane, and an angle Φ in the vertical direction (-z direction). Note that the laser receiving pointer 52 is a sphere, and the position at which the laser is reflected can be considered to be substantially the center of the laser receiving pointer 52.

[0053] Next, the central coordinates of each laser receiving pointer in the x, y, z system are calculated (step S21c). Here, the z axis is the vertical direction. As long as the x and y axes are mutually orthogonal coordinate axes, the directions may be a coordinate system intended only for the installation of the vertical shaft water turbine generator 30. Alternatively, if there is an overall coordinate system for the building, it may be aligned with that.

[0054] With the position of the laser transmitter of the laser tracker 51 as the origin, the coordinates of the center position of the laser receiving pointer 52 in the x, y, z system can be found by the following equations (1), (2) and (3). x = L cosΦ cosΘ (1) y = L cosΦ sinΘ (2) z = L sinΦ (3)

[0055] In this manner, the laser receiving pointer 52 is positioned and the position of the laser receiving pointer 52 is measured in sequence, for example, at three points P1, P2 and P3.

[0056] As a result, the coordinates of each point are obtained as P1(x1,y1,z1), P2(x2,y2,z2), and P3(x3,y3,z3).

[0057] Next, the center position of the lower cover 13 is calculated (step S22).

[0058] First, the positions of P1, P2, and P3 are projected onto a plane at height z=z0 (step S22a). Since it is sufficient to project onto the same horizontal plane, the height z=z0 is arbitrary, but the plane at height z=z0 (z0 plane) may be, for example, the floor height of the turbine floor 1a.

[0059] FIG. 7 is a plan view showing the positioning of the laser receiving pointer in the step S20 of deriving the installation central axis L0 based on the installation position of the bottom cover 13 in the installation method for the vertical shaft water turbine generator according to the embodiment.

[0060] The projections of P1, P2, and P3 onto the z0 plane are denoted as Pr1, Pr2, and Pr3, respectively, as shown in FIG.

[0061] Here, the radius of the circle S0 defined by the inner peripheral surface 13a of the lower cover is R0, the radius of the laser receiving pointer is r, and (R0-r) is R1. The projected points Pr1, Pr2, and Pr3 are on the circle S1 of radius R1. Here, the circle S1 of radius R1 and the circle S0 of radius R0 are on the same horizontal plane, and their centers coincide. Here, the common center of both is Pc(xc, yc, z0).

[0062] Next, the center coordinates of the lower cover inner circumferential surface 13a are calculated (step S22b). As described above, the circle at the height z0 of the lower cover inner circumferential surface 13a is the circle S0. The center Pc of the circle S0 is also the center of the circle S1.

[0063] FIG. 8 is a plan view for explaining derivation of the installation central axis L0 based on the installation position of the lower cover 13 in the installation method for the vertical shaft water turbine generator according to the embodiment.

[0064] The coordinates of the center Pc can be calculated from the condition that the distance between the center Pc and point Pr1, the distance between the center Pc and point Pr2, and the distance between the center Pc and point Pr3 are the same.

[0065] Alternatively, since the circle S1 is the circumscribing circle of the triangle (Pr1-Pr2-Pr3), a method of finding the center of the circumscribing circle of the triangle, that is, the circumcenter, may be used.

[0066] The circumcenter of the triangle (Pr1-Pr2-Pr3) is obtained by finding the intersection point between the perpendicular bisector La of the side Pr1-Pr2 and the perpendicular bisector Lb of the side Pr2-Pr3, as shown in FIG.

[0067] Next, the installation central axis L0 is set (step S22c). Specifically, the center position Pc (xc, yc, z0) of the obtained circle S1 is extended in the vertical direction, that is, z is made variable to obtain the installation central axis L0 (xc, yc, z). The installation central axis L0 includes the center point Pc of the lower cover inner peripheral surface 13a. Here, for the xy coordinates, a coordinate conversion is performed so that the origin is located on the installation central axis L0. Specifically, if the values ​​of the x coordinate and the y coordinate before the coordinate conversion are x1 and y1, respectively, the value of the x coordinate is set to (x1-xc) and the value of the y coordinate is set to (y1-yc). As a result, the coordinates of the point of the height position coordinate z on the installation central axis L0 are given as (0, 0, z).

[0068] The above is the detailed procedure of the step of deriving the installation central axis based on the installation position of the lower cover (step S20).

[0069] Next, a target mark is placed on the building side and the installation center axis information is transferred (step S30).

[0070] FIG. 9 is a flow chart showing detailed procedures of step S30 for placing a target mark on the building side and transferring installation central axis information in the installation method for the vertical shaft water turbine generator according to the embodiment.

[0071] FIG. 10 is a plan view for explaining the transfer of installation central axis information to a target mark on the building side in the installation method for the vertical shaft water turbine generator according to the embodiment.

[0072] First, the target mark 55 is placed on the building side (step S31). At least one target mark 55 is placed on each of the turbine floor 1a and the generator floor 2a. The target mark 55 may be placed in a location other than the turbine floor 1a of the turbine floor foundation concrete 1, and in a location other than the generator floor 2a of the generator floor foundation concrete 2. Note that placing includes attaching to the floor and walls of the building.

[0073] Here, the target marks 55 indicate the reference positions on the building side, i.e., on the turbine floor 1a and the generator floor 2a. The target marks 55 are, for example, square or rectangular, flat boards, paper, cloth, etc., marked with a cross. The intersection of the cross is the reference position. The coordinates of the reference position are recorded corresponding to the target marks 55.

[0074] Furthermore, if providing multiple target marks 55 makes it easier to measure in relation to the position of the component to be installed, the target marks 55 are provided dispersed in the circumferential direction. For example, if there are three target marks 55, the central positions of the respective target marks 55 are designated as Pt1, Pt2, and Pt3. Step S31 is performed in parallel with the above-mentioned step S21 for measuring the position of the lower cover 13.

[0075] Next, the laser receiving pointer 52 is placed in sequence so that its center is aligned with the vertical line through the center of each target mark 55. Fig. 10 shows a case where the laser receiving pointer 52 is placed at position Pt1. The laser tracker 51 used in step S21 for measuring the position of the lower cover 13 described above is used in the same position to measure the position of the laser receiving pointer 52 on each target mark 55 (step S32). The obtained position coordinates of the target mark 55 are vector coordinates with the position of the laser transmitter as the origin.

[0076] Next, for the position of the laser receiving pointer 52, the coordinates are calculated in the (x, y, z) system with the position of the laser transmitter as the origin (step S33). The calculation at this time is the same as that of the above-mentioned equations (1) to (3). The planar position of the target mark 55, i.e., (x coordinate value, y coordinate value) coincides with the laser receiving pointer 52. As a result, the coordinates of the center positions Pt1, Pt2, and Pt3 of the target mark 55 in the (x, y, z) system are obtained. Here, for example, the coordinates of Pt1 are assumed to be (xt1, yt1, zt1).

[0077] Next, the coordinate conversion performed in step S22 of calculating the center position of the lower cover 13 to set the origin of the xy coordinates on the installation center axis L0 is applied to the position coordinates of the target mark 55. Specifically, if the values ​​of the x and y coordinates before the coordinate conversion are xt1 and yt1, respectively, the value of the x coordinate is set to (xt1-xc) and the value of the y coordinate is set to (yt1-yc). As a result, the coordinates of the center position Pt1 of the target mark 55 are given by (xt1-xc, yt1-yc, z). The same applies to the other target marks.

[0078] As a result, the three-dimensional coordinates of the position of the target mark 55 relative to the installation central axis L0 are obtained. Although the installation central axis L0 (0,0,z) is a virtual straight line and cannot be visually recognized, the horizontal position of the installation central axis L0 can be calculated backwards from the obtained three-dimensional coordinates of the position of the target mark 55. In other words, the information of the installation central axis L0 (0,0,z) is transferred to each target mark 55 as each coordinate information of the target mark 55.

[0079] In this way, the information on the installation central axis L0 is transferred as information on each coordinate of the target mark 55, so that when each component is installed, the central position of that component can be found based on its position relative to the target mark 55. Therefore, centering can be performed so that the central position is on the installation central axis L0 (0, 0, z).

[0080] Fig. 11 is a flow diagram showing detailed procedures of step S80 of installing the stator 22 in the installation method of the vertical shaft water turbine generator according to the embodiment. Also, Fig. 12 is a plan sectional view for explaining the installation step of the stator 22 in the installation method of the vertical shaft water turbine generator according to the embodiment.

[0081] Step S80 includes a step of temporarily placing the stator integrated body 20a (FIG. 12) in which the stator 22 is mounted within the frame 23 (step S81), a step of measuring the coordinates of measurement points on the stator inner surface 22a and the measurement points on the frame outer surface 23a (step S82), and a step of positioning and installing the stator 22 (step S83).

[0082] First, the stator integrated unit 20a in which the stator 22 is attached inside the frame 23 is placed on the generator floor 2a of the generator floor foundation concrete 2 (step S81).

[0083] Next, the central coordinates of the stator inner peripheral surface 22a and the frame outer peripheral surface 23a are measured (step S82). The detailed procedure of step S82 is as follows. Note that the same reference numerals as in step S20 are used for the same parts as those in step S20, and detailed explanations are omitted.

[0084] First, the laser receiving pointer 52 is placed at a measurement point on the stator inner circumferential surface 22a, and the laser tracker 51 transmits and receives laser light to obtain the horizontal direction Θ, vertical direction Φ, and measurement distance Ls of the measurement point on the stator inner circumferential surface 22a (step S82a). This is performed for at least three locations on the stator inner circumferential surface 22a.

[0085] Next, the relative coordinates of the center (center of the sphere) of each laser receiving pointer 52 in the (x, y, z) system with the laser tracker 51 as the origin are calculated (step S82b).

[0086] Next, the three-dimensional position of the laser tracker 51 is calculated from the target mark 55 provided on the generator floor foundation concrete 2, and the coordinates of the center (center of the sphere) of each laser receiving pointer are corrected. Furthermore, the coordinates of the center point C1 of the stator inner circumferential surface 22a are calculated based on the corrected coordinates of each laser receiving pointer 52 (step S82c).

[0087] Next, the position coordinates of the laser receiving pointer 52 on the frame outer peripheral surface 23a are calculated based on the position coordinates of the target mark 55 provided on the generator floor foundation concrete 2 (step S82d). Next, the coordinates of the center point C2 of the frame outer peripheral surface 23a are calculated (step S82e). A target mark 57 is provided at the point on the frame outer peripheral surface 23a where the laser receiving pointer 52 is provided.

[0088] Next, the stator is positioned and installed (step S83).

[0089] In step S83, first, the relative position of the center C2 of the frame outer peripheral surface 23a with respect to the center C1 of the stator inner peripheral surface 22a is calculated (step S83a).

[0090] Next, while checking the relationship between the target mark 55 on the generator floor foundation concrete 2 and the target mark 57 on the frame outer peripheral surface 23a, the horizontal position of the stator integral body 20a is adjusted so that the center C1 of the stator inner peripheral surface is on the installation center line (step S83b).

[0091] Next, the position of the stator integrated unit 20a in which the stator 22 is housed and fixed within the frame 23 is fixed (step S83c).

[0092] As described above, according to this embodiment, first, after the lowest bottom cover 13 is installed, the installation center axis L0 is determined based on the bottom cover inner peripheral surface 13a, and this result is transferred to the building side, i.e., the turbine floor concrete foundation 1 and the generator floor concrete foundation 2. As a result, each component that is subsequently carried in from above and installed can be centered when it is installed. As a result, each component only needs to be carried to the site at the time of installation, and storage space can be significantly reduced.

[0093] Furthermore, since centering of each component can be performed based on the information transferred to the building, the problem of measurement errors occurring easily as with the conventional piano wire method is solved.

[0094] In addition, in the installation method of this embodiment, since the change in the center position over time can be confirmed without disassembling the vertical shaft water turbine generator 30, the change in the center position can be used to confirm the signs of failure of the vertical shaft water turbine generator 30 before it occurs. For example, when the temperature of the bearing is rising, the relative position of the center position C2 with respect to the installation center described in this embodiment is calculated, and if this relative position is greater than a predetermined value, it can be confirmed that the center position of the bracket (bearing gap) may be significantly shifted. Alternatively, when vibration occurs in the stator 22 or the rotor 26, the relative position of the center position C2 with respect to the installation center described in this embodiment is calculated, and by tracking the change, it can be confirmed that the air gap between the stator 22 and the rotor 26 may be changing.

[0095] According to the embodiment described above, after installing the bottom cover 13, the center point of the bottom cover inner surface 13a is found to derive the installation center axis L0, and the information of the installation center axis L0 is transferred to the target mark 55 of the building, making it possible to center the structure easily and with high precision.

[0096] Although several embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented 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 in the scope and spirit of the invention, and are included in the scope of the invention and its equivalents described in the claims. [Explanation of symbols]

[0097] Reference Signs List 1... Turbine floor foundation concrete, 1a... Turbine floor, 2... Generator floor foundation concrete, 2a... Generator floor, 10... Turbine, 11... Casing, 12... Speed ​​ring, 13... Lower cover, 13a... Inner surface of lower cover, 14... Upper cover, 14a... Inner surface of upper cover, 15... Turbine bearing support base, 15a... Inner surface of turbine bearing support base, 16... Runner, 17... Turbine rotor shaft, 18... Guide vane, 19... Turbine bearing, 20... Generator, 20a... Stator unit, 21... Lower bracket, 21a... Lower bracket inner peripheral surface of the bracket, 22... stator, 22a... inner peripheral surface of stator, 23... frame, 23a... outer peripheral surface of frame, 24... upper bracket, 24a... inner peripheral surface of upper bracket, 25... generator rotor shaft, 26... rotor, 27... lower bearing, 28... upper bearing, 30... vertical shaft water turbine generator, 31... coupling, 51... laser tracker, 52... laser receiving pointer, 55... water turbine floor target mark, 56... generator floor target mark, 57... outer frame target mark, 60... piano wire, 61... weight

Claims

1. A method for installing a vertical shaft water turbine generator, comprising: a water turbine having a lower cover, a runner, a guide vane, and an upper cover, which is installed on a concrete foundation of a water turbine floor; and a generator having a lower bracket, a stator, a frame, and an upper bracket, which is installed on a concrete foundation of a generator floor, comprising: A bottom cover installation step of installing the bottom cover on the turbine floor foundation concrete; a center axis deriving step of determining a center point of an inner peripheral surface of the lower cover installed in the lower cover installation step, and deriving an installation center axis; a transfer step of calculating coordinates of target marks installed on the turbine floor foundation concrete and the generator floor foundation concrete based on the installation central axis; a member installation step of sequentially installing each of the members to be installed above the lower cover by positioning the center position of each member on the installation central axis based on the information of the target mark; having The transfer step includes: placing the target marks on the turbine floor foundation concrete and the generator floor foundation concrete; measuring the position of the target mark; Transforming the coordinates of the position of the target mark into coordinates based on the installation central axis; Having A vertical shaft water turbine generator installation method characterized by the above.

2. The central axis deriving step includes: a position measuring step of measuring positions of at least three measurement points on an inner peripheral surface of the lower cover; a center calculation step of calculating the circumcenter of a triangle having vertices at three of the measurement points as a center position of the inner peripheral surface of the lower cover; 2. The method for installing a vertical shaft water turbine generator according to claim 1, further comprising the steps of:

3. In the position measuring step, a laser is transmitted from a laser tracker to a laser receiving pointer installed on an inner peripheral surface of the lower cover, In the center calculation step, the apex is set as the center of the laser receiving pointer.

3. The method for installing a vertical shaft water turbine generator according to claim 2.

4. The step of installing the stator in the step of installing each member includes: housing the stator within the frame to form an integral unit; a step of temporarily placing the integrated object on the generator floor foundation concrete; measuring positions of three or more locations on an inner peripheral surface of the stator; calculating a center position of the inner peripheral surface of the stator; measuring three or more positions on an outer peripheral surface of the frame; Calculating a center position of the outer circumferential surface; a stator centering step of adjusting a position of the frame based on the calculated relative relationship between the center position of the stator inner peripheral surface and the center position of the frame outer peripheral surface so that the center position of the stator inner peripheral surface is on the central axis; 4. The method for installing a vertical shaft water turbine generator according to claim 1, further comprising:

5. The member installation step includes: Installing the runner and the guide vanes on the lower cover; installing the upper cover on the upper portion of the runner and the guide vanes; a water turbine bearing support installation step of installing a water turbine bearing support on the upper cover; a lower bracket installation step of installing the lower bracket on the generator floor foundation concrete after the water turbine bearing support installation step; a stator installation step of installing the stator after the lower bracket installation step; a rotor installation step of inserting a rotor into the stator; installing the upper bracket after the rotor installation step; 4. The method for installing a vertical shaft water turbine generator according to claim 1, further comprising:

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