JP3187270B2 - How to install the main terminal box of the rotating electric machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION This invention relates to a mounting method of installing a main terminal box for housing the output terminal of the large rotary electric machine of the turbine generator such as a stator frame of a rotary electric machine.

[0002]

4 to 6 are partial sectional views of a conventional turbine generator, FIG. 4 is a longitudinal sectional view of a main part of the turbine generator, FIG. 5 is an assembly view of a terminal box of FIG. FIG. 6 shows the VI of FIG.
FIG. 6 is a VI sectional view. 2. Description of the Related Art A large rotating electric machine such as a turbine generator employs a method of disassembling or individually transporting a stator frame, a rotor, and the like that constitute the rotating electric machine, and assembling and installing it on site. In the turbine generator shown in FIG. 4, the stator core 10 and the stator frame 3 that have been disassembled and transported are installed on the foundation 1 as described later, and are positioned and installed by the positioning device 14. Thereafter, the stator coil 9 is mounted in a core slot (not shown) of the assembled stator core 10, and the rotor 15 is inserted into the center of the stator core 10 to install the generator body.

An output conductor for deriving the power output from the stator coil 9 of the turbine generator is connected to a terminal plate (not shown) in the main terminal box 2 made of a steel plate provided on the bottom of the stator frame 3. , Are connected to an external connection conductor via a bushing 16. In a large-capacity turbine generator, the above-mentioned output voltage is more than tens of KV, the insulation distance between the terminals of the output conductor needs to be large, and the size of the main terminal box 2 provided on the stator frame 3 is also large. It is almost a few meters, and its weight is about ten tons. Therefore, in order to attach the main terminal box 2 to the stator frame 3 of the generator at the site, as shown in FIG. 6, the legs 11 provided on the side surfaces of the stator frame 3 are fixed to the base 1 with the mortar 13. The generator body is installed on the embedded base plate 12 and then attached to the bottom of the stator frame 3.

As shown in FIGS. 5 and 6, the main terminal box 2 is mounted on a support base 22 placed on a floor 23 in advance. Hanging ears 1 provided on both side surfaces of the stator frame 3 and the main terminal box 2
A wire 20 is attached to the wires 8 and 19, the main terminal box 2 is lifted by the chain block 17, and the main terminal box 2 and the stator frame 3 are fixed by bolts and nuts (not shown) in the lifted state. The terminal box 2 is set on the support base 22 via the jack 21, the main terminal box 2 is lifted by the jack 21, and fixed to the stator frame 3 at a predetermined position in the same manner as described above. Had been.

[0005]

The conventional method of mounting the main terminal box 2 to the stator frame 3 is performed in a narrow space surrounded by the foundation 1 on which the generator body is installed. In the operation of lifting the main terminal box 2 with the chain block 17 or the jack 21, it is very difficult to attach the wire 20 and the chain block 17, and the lifting or lifting of the heavy main terminal box 2 while maintaining the balance is performed. There is a problem that it takes a lot of time to lift and fix the stator frame 3 at a predetermined position. Also, when the main terminal box 2 is detached from the stator frame 3 for maintenance and inspection work, there is also a problem that the number of work steps is extremely long as in the case of the assembly.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method of mounting a main terminal box of a rotating electric machine which solves the above-mentioned problems, has a small number of mounting steps, and can securely fix the main terminal box to a stator frame.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a main terminal box in which a main terminal box for accommodating an output terminal of a rotating electric machine is arranged at the bottom of a stator frame of the rotating electric machine. In the mounting method, an assembling table attached to each of the foundation and the side surface of the main terminal box, stud bolts inserted through these assembling tables, and both ends in the axial direction of the stud bolts contacting the assembling tables. After the main terminal box is attached to a predetermined position of the foundation in advance by using an assembling device including nuts that are inserted and attached and adjust the position in the axial direction and fix the stud bolts to each of the assembling bases, the fixing of the rotating electric machine is performed. The main terminal box and the stator frame are connected and fixed by installing the child frame on a foundation.

[0008]

The present invention is different from the conventional method of mounting a main terminal box on a rotating electric machine main body, which is mounted on a base, and then moving and fixing the main terminal box to a predetermined position of a stator frame. The main terminal box is moved while maintaining a balance in a narrow space surrounded by the foundation by adopting a method of providing the stator frame of the rotating electric machine on the foundation in advance at a predetermined position on the foundation in advance. The main terminal box can be easily attached to the stator frame by moving the main terminal box to a predetermined position where the stator frame is installed by the assembling apparatus, adjusting the position, and positioning the main terminal box. . That is, by rotating the nut inserted into the stud bolt of the assembling device attached to the foundation and the main terminal box, the vertical position of the main terminal box can be adjusted, so that the conventional chain block and jack described above can be used. The main terminal box can be safely attached to the stator frame of the rotating electric machine in a shorter time than the work of lifting the main terminal box while maintaining the balance.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on embodiments.
1 to 3 are partial sectional views of a turbine generator according to an embodiment of the present invention. FIG. 1 is an assembled sectional view of a main terminal box.
2 is an enlarged sectional view of a portion P in FIG. 1, and FIG. 3 is a view taken in the direction of the arrow Q in FIG. The drawings correspond to the conventional FIGS. 4 to 6, respectively, and the same parts as those in the related art are denoted by the same reference numerals and detailed description thereof will be omitted. The main terminal box 2 shown in FIG.
Before the stator frame 3 of the turbine generator is installed on the foundation 1 by the legs 11 attached to the side surface of the stator frame 3, the stator frame 3 is installed on the side surface of the foundation 1 by using the assembling device 4, and then the foundation 1 And fixed to the stator frame 3 installed in the above.

An assembling apparatus 4 for installing the main terminal box 2 at a predetermined position on the foundation 1 is provided on both sides of the foundation 1 and the main terminal box 2 in FIG. A total of four locations are provided. This assembling device 4 is shown in FIG.
As shown in FIG. 3 and FIGS. 3A and 3B, assembly tables 40 and 401 attached to the side surface of the foundation 1 and the side surface of the main terminal box 2, respectively, stud bolts 5 penetrating these, and the stud bolts 5 Nuts 6 and 6 to be fixed to 401
1. The assembling table 40 attached to the foundation 1 has a support plate 43 closely attached to a support plate 44 embedded in the foundation 1 and fixed with embedding bolts 8, and is horizontally fixed to an end of the support plate 43. Overhanging support 4
The support table 41 is supported by support legs 42, 42 having the other end fixed to the support plate 43.

An assembly table 4 attached to the main terminal box 2
Reference numeral 01 also has a structure similar to that of the assembling table 40, and a support plate 43 fixed to a side surface of the main terminal box 2 with bolts 81.
A support 411 is fixed so as to be parallel to the support 41 of the assembling table 40 in a direction perpendicular to the support table 1.
The other ends of the support legs 421, 42 fixed to the support plate 431
1 supported.

[0012] The assembling table 40 and 401 provided on the side surfaces and the main terminal box 2 of the foundation 1 that is above, are connected by stud bolts 5 as described above. The stud bolt 5 is provided between the through hole 91 of the support 41 and the support 4.
11 and nuts 6 and 61 inserted together with washers 7 and 71 at both ends thereof are fastened and fixed to support tables 41 and 411. A split pin 62 is inserted through the stud bolt 5 from the side surface of the nut 61 that fixes the stud bolt 5 to the support table 411 of the assembly table 401 provided in the main terminal box 2. The rotation of 5 prevents the support 401 supporting the main terminal box 2 from falling out of the stud bolt 5.

A method of attaching the main terminal box 2 to the stator frame 3 by using the assembling device 4 provided on the foundation 1 and the main terminal box 2 will be described below. First, the main terminal box 2 (not shown)
Place wires on the hanging ears provided on the side of the
The main terminal box 2 is hung by a crane below the assembly table 40 provided in the above and a little below the position where the main terminal box 2 is fixed to the stator frame 3 of the turbine generator. next,
One end of nut 61 is prevented from turning by split pin 62.
The stud bolts 5 that have been worn are
After being inserted from the through hole 92 of the
Into the through hole 91 of the assembling table 40, and through the washer 7
The main terminal box 2 on the foundation 1
Let

After the main terminal box 2 is installed at a predetermined position on the foundation 1, the stator frame 3 of the turbine generator is installed on the foundation 1.
Thereafter, the nut 6 inserted into the stud bolt 5 of the assembling apparatus 4 is rotated to adjust the position, and the main terminal box 3 is adjusted to a predetermined position of the stator frame 3. The mounting is completed by connecting and fixing the main terminal box 3. As described above, the assembling device 4 is provided at two locations on both sides of the base 1 and the main terminal box 2 in total, and the position is adjusted and fixed.
Accurate position setting is possible. Further, since the main terminal box 2 can be attached to the stator frame 3 with the main terminal box 2 fixed to the foundation 1 by the assembling apparatus 4 without lifting and lifting by the chain block and the jack, the operation can be performed more safely.

[0015]

As described above, according to the present invention, in a method of mounting a main terminal box for housing an output terminal portion of a rotating electric machine at the bottom of a stator frame, a method of mounting a base, a main terminal box, Assembling tables attached to each of the side surfaces of the studs, stud bolts penetrating these assembling tables, and axially adjusting the position in the axial direction by being inserted in contact with the assembling tables at both axial ends of the stud bolts. Then, the main terminal box is previously mounted at a predetermined position on the foundation using an assembling apparatus including nuts for fixing stud bolts to the respective assembly bases. The terminal box and the stator frame are connected and fixed. This eliminates the need for lifting the main terminal box in a space surrounded by a narrow foundation with a chain block or lifting it with a jack and installing it on the bottom of the stator frame as in the past. By installing the main terminal box on the base of the position with the assembling device and adjusting the position, the main terminal box can be easily mounted on the stator frame, greatly shortening the assembling work time and ensuring reliable and safe work. Becomes possible.

Further, after removing the bolts and nuts connecting and fixing the main terminal box to the stator frame, the main terminal box may be separated from the stator box by rotating the nut inserted into the stud bolt. Therefore, there is an advantage that the operation of removing the main terminal box from the stator frame during maintenance and inspection can be easily performed.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main terminal box of a turbine generator according to an embodiment of the present invention.

FIG. 2 is an enlarged sectional view of a portion P in FIG.

FIG. 3 is a view as viewed in the direction of the arrow Q in FIG. 2;

FIG. 4 is a longitudinal sectional view of a main part of a turbine generator for explaining the present invention.

FIG. 5 is a mounting diagram of a conventional main terminal box.

6 is a sectional view taken along the line VI-VI in FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Foundation 2 Main terminal box 3 Stator frame 4 Assembly apparatus 40 Assembly table 401 Assembly table 41 Support table 411 Support table 42 Support leg 421 Support leg 43 Support plate 431 Support plate 5 Stud bolt 6 Nut 61 Nut

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H02K 5/22 H02K 5/00 H02K 15/14

Claims (1)

(57) [Claims] 1. A rotary terminal for installing a main terminal box for accommodating an output terminal from a rotary electric machine at a bottom portion of the stator frame of the rotary electric machine mounted on a foundation with legs provided on side surfaces of the stator frame. In the method of mounting the main terminal box of the electric machine, an assembling table attached to each of the foundation and the side surface of the main terminal box, stud bolts inserted through these assembling tables, and both ends in the axial direction of the stud bolts. After the main terminal box is attached to a predetermined position of the foundation in advance by using an assembling device including nuts that are inserted and adjusted in the axial direction to fix the stud bolts to the respective assembly bases, and then fix the rotating electric machine. Install the child frame on the foundation,
A method for mounting a main terminal box of a rotating electric machine, wherein the main terminal box and a stator frame are connected and fixed.