JPH08251882A - Jig for assembly of fan guide of rotating electric machine - Google Patents

Abstract

PURPOSE: To provide a jig for assembly of the fan guide of a rotating electric machine by which the manhour in assembly work to a stator frame of fan guide which introduces and guides the cooling air sent by a fan into the body of a rotating electric machine is reduced, and the work can be made surely and safely. CONSTITUTION: Using a jig for assembly of a fan guide consisting of a support plate 14, which has a lifting metal fitting 15 for lifting up a fan guide and is coupled with the fan guide with a bolt, and a fixed metal fitting 23, which can slide in the circumferential direction of the periphery of the rotor shaft 2 fixing this lifting jig 15, the support plate 14 is lifted and shifted, and the fan guide fixed to the fixed metal fitting 23 is shifted to the specified position in circumferential direction of the rotor shaft 2, and can be coupled to a stator frame 4 with a bolt.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jig for assembling a fan guide for introducing cooling air blown by a fan from an air cooler and a gas cooler of a rotary electric machine such as a turbine generator into the machine.

[0002]

2. Description of the Related Art FIG. 3 is a sectional view of an air-cooled turbine generator, and FIG. 4 is a front view of a fan guide. In the air-cooled turbine generator shown in FIG.
Cooling air 5, 5 indicated by arrows from an air cooler (not shown) arranged above the stator frame 4 is distributed to the rotor shaft 2 located near both ends of the coil end portion of the stator winding 1. By driving the fans 3 and 3 which are fixed to each other by bolts, the cooling air suction covers 6 and 6 formed by the stator frame 4 are ventilated, and the stator frames 4 and 4 are provided on the outer circumference of the fans 3 and 3.
The fan guides 7, 7 attached with bolts 8 guide the rotor shaft 2 from both ends into the machine. Cooling winds 5, 5 guided by these fan guides 7, 7.
Is a cooling wind 5 for cooling the coil end portion of the stator winding 1.
A and 5A and cooling air that is ventilated in the axial direction of the rotor shaft 2.

The cooling air ventilated in the axial direction of the rotor shaft 2 passes through the gap between the stator core 9 and the rotor shaft 2 to the stator core 9 and the unillustrated rotor shaft 5B. Two
Is divided into cooling air 5C that passes through the ventilation holes provided in the axial direction of the body portion of the stator core 9 and is ventilated to the air cooler through the back space of the stator core 9 described above. Further, a part of the cooling air 5A for cooling the coil end portion of the stator winding 1 is separately blown to the exciter device mounted on the rotor shaft 2 (not shown) for cooling.

A fan guide 7 for introducing and guiding the cooling air 5 blown by the fan 3 from the air cooler into the machine.
3 has a cylindrical shape so as to cover the outer periphery of the fan 3 as shown in FIG. 3, so that the cooling air 5 from the cooling air suction cover 6 can be blown into the machine by the fan 3 with as little windage loss as possible. In addition, the surface in contact with the cooling air 5 has a shape extending in an arc shape toward the inner side of the rotor shaft 2. Further, the air shield 10 of the cooling air intake cover 6 facing the fan guide 7 has a wall portion inclined to the rotor shaft 2 along the ventilation direction of the cooling air 5.

As shown in FIG. 4, the fan guide 7 is made of an aluminum cast product which is divided into two fan guides 7a and 7b.
Reinforcing beams 11 are provided at intervals in the circumferential direction in order to reinforce the arcuate surface extending in the axial direction. And
In order to mount the fan guides 7 by mounting the two divided semicircular fan guides 7a and 7b on the stator frame 4, first, the fan guides 7a are mounted on the stator frame 4 on the upper side of the rotor shaft 2. By hand, and bolt holes 1 for mounting the stator frame
2 and the cooling air suction cover 6, the bolts 8 are inserted and attached to the bolt holes of the stator frame 4 on the inside of the machine, and then the rotor shaft 2
The lower fan guide 7b is connected to the rotor shaft 2 as described above.
Is moved to a position below and installed, and attached to the lower stator frame 4 with bolts 8. Then these fan guides 7
Flange 13 projecting from the end faces of a and 7b
This is done by inserting bolts into the bolt mounting holes 13d of a and 13b, connecting them with bolts, and assembling.

[0006]

As described above, when attaching the fan guide 7 to the conventional stator frame 4, the fan guides 7a and 7ba which are divided into two are lifted while maintaining balance, and the fan guides 7a and 7ba are lifted. 7ba bolt hole 1
There is a problem that it takes time and time for assembling work in order to perform the step 2 in alignment with a predetermined bolt hole of the stator frame 4. Further, when the generator capacity is large, the outer diameter of the fan guide 7 is several meters and the weight thereof is also large, and it is very difficult to manually lift and install the fan guide 7. There was concern about the work and the safety of the work, and improvements were required.

The object of the present invention is to solve the above problems,
An object of the present invention is to provide a fan guide assembling jig for a rotary electric machine that reduces the number of man-hours and assembling and assembling a fan guide that guides cooling air into the machine to a stator frame, and that enables safe operation.

[0008]

In order to solve the above-mentioned problems, the present invention is mounted by a bolt using a stator frame mounting bolt hole provided on the outer peripheral surface of a fan guide divided into a plurality of parts. A support plate for supporting the fan guide; a hanging metal fitting attached to the supporting plate; and a fixing metal fitting slidably arranged in the circumferential direction of the rotor shaft to support the supporting plate and the hanging metal fitting. A support plate that supports the fan guide is attached to the fixing bracket by lifting the hanging bracket, and the fixing bracket is moved in the circumferential direction of the rotor shaft and divided into predetermined positions on the stator frame. Can be assembled with bolts.

Further, the fixing metal fitting slidably arranged in the circumferential direction of the rotor shaft is composed of a circular fixing metal fitting in which each of the two semicircular metal fitting pieces is bolted together, and one semicircular metal fitting. It is preferable to provide a fixing portion for supporting the support plate and the hanging metal fitting on the outer peripheral surface of the piece.

[0010]

According to the present invention, instead of the conventional assembly work of manually lifting each of the divided fan guides to a predetermined position of the stator frame and moving and mounting the fan guides, the fan guides are lifted by a hoist or the like. Install the fan guides on the rotor shaft and install them in the circumferential direction so that the divided fan guides can be moved and fixed to the positions of the mounting stator frames. It is slidable. For this reason, in order to lift the above-mentioned fan guide, using a bolt hole provided in a fan guide for bolting to the stator frame, a support plate provided with a lifting metal fitting for hanging the fan guide in the bolt hole is used. I attached it by bolting. In addition, by supporting the bolt-supported support plate on the outer circumference of the rotor shaft through a fixing bracket that is slidably mounted in the circumferential direction, a predetermined position in the circumferential direction of the rotor shaft is provided. It is possible to move to the stator frame of.

Then, the fixing plate for moving the supporting plate provided with the above-mentioned lifting metal member for lifting the fan guide in the circumferential direction of the rotor shaft is composed of a circular fixing metal member in which each of the two divided metal member pieces is bolted. Then, a fixing portion for supporting the support plate is provided on the outer peripheral surface of the one semicircular metal piece. With this, the fan guide can be moved to the lower side of the rotor shaft by fixing the fan guide on the upper side of the rotor shaft with the fixing portion and rotating the fixing metal fittings. The work of attaching the fan guide is facilitated, and the assembly jig can be easily disassembled by removing the bolts after attaching and assembling the fan guide.

[0012]

EXAMPLES The present invention will be described below based on examples.
1 and 2 are partial cross-sectional views of a generator according to an embodiment of the present invention. FIG. 1 is an explanatory view of attaching a fan guide to a stator frame with an assembly jig, and FIG. 2 is II- of FIG. It is a partial cross section of II. 1 and 2, a fan guide 7a (FIG. 4) covering the upper side of the fan 3 mounted on the rotor shaft 2 of the fan guide 7 divided into two parts, and a stator for the cooling air suction cover 6 The jig for assembling for attaching to the upper side of the frame 4 is shown. The mounting method using this fan guide assembling jig will be described below. First, as shown in FIG. 2, the support plate 14 having a trapezoidal cross section is attached to the fan guide 7a.
By using the bolt holes 12 (FIG. 4) for mounting the stator frame provided on the outer peripheral surface of the bolt, bolts 14 are provided at the bolt holes provided at several positions in the circumferential direction of the support plate 14 so as to correspond to the bolt holes 12.
Insert a and bolt it. Next, the fan guide 7a supported by the support plate 14 is rod-shaped and bolted to both end faces of the support plate 14 with bolts 16a, 16a so that the fan guide 7a can be moved in the vertical and horizontal directions of the rotor shaft 2. A hanging jig 18 composed of a side plate 16 provided with a lifting metal fitting 15 vertically and a fixed plate 17 integrally welded to the central portion of the side plate 16 at right angles is provided with a bolt 17a, 17a at the center of the support plate 14. It is attached and fixed to the surface.

The hanging jig 18 attached to the fan guide 7a as described above is passed through the wire 20 through the retainer 15 provided in the central portion of the lifting metal fitting 15 as shown in FIG.
The hoist 21 hoists and moves up to the rotor shaft 2 at the mounting position of the stator frame 4. At this time, if the weight for balancing 22 is provided on the lifting metal fitting 15 on the side opposite to the fan guide 7a, the weight can be balanced during movement, and the fan guide 7a can be prevented from shaking.

Next, after moving the fan guide 7a to a predetermined position, the fan guide 7a is moved to the hanging jig 18
The end portion of the fixing plate 17 and the fixing portion 24 protruding to the side surface of the upper metal fitting piece 23a constituting the fixing metal fitting 23 provided on the outer peripheral portion of the rotor shaft 2 are bolted with bolts 24a and 24a. To fix it. Then, the fan guide 7 supported by the hanging jig 18 via the support plate 14.
The fixing bracket 23 is moved and positioned on the circumference of the rotor shaft 2 so that the a is located at the mounting position of the stator frame 4 on the upper side of the rotor shaft 2, and the support plate 14 is bolted to the fan guide 7a. The fan guides 7a are attached to the stator frame 4 by sequentially bolt-attaching them to the stator frame 4 with bolts 8 (FIG. 3) while removing the bolts 14a that are being joined one by one.

As described above, when the fan guide 7 is divided into two semicircular parts 7a and 7b, the support plate 14 of the fan guide 7a lifted and moved by the hoist 21 is suspended. Without fixing the fixing plate 17 of the jig 18 to the fixing member 23 by bolting, the position of the fan guide 7a and the stator frame 4 is adjusted, and the fan guide 7a and the supporting plate 14 are adjusted as described above.
It is also possible to attach the fan guide 7a to the stator frame 4 with the bolt 8 while removing the bolt 14a that is bolted to and. However, if the support plate 14 is fixed to the fixing member 23, the positioning is easier and the mounting and assembling work can be performed safely.

Further, the fan guide 7b attached to the stator frame 4 located on the lower side of the rotor shaft 2 is the fan guide 7b.
As in the case of a, the hanging jig 1 is placed on the upper side of the rotor shaft 2.
After fixing the fixing plate 17 of No. 8 to the fixing portion 24 of the metal fitting piece 23a of the fixing metal fitting 23 with the bolts 24a, 24a,
Position it by rotating it 180 degrees below the rotor shaft 2.
Similarly to the above, the bolts 14a are removed, and the bolts 8 are bolted to the stator frame 4 and fixed. Next, the fan guides 7a and 7b positioned on the stator frame 4 as described above are provided with flanges (13, 1) provided at their respective ends.
3) The fan guide 7 can be attached and assembled to the stator frame 4 by bolting the two together with bolt holes 13d.

[0017]

As described above, according to the present invention, the stator frame provided on the fan guide is provided on the fan guide divided into a plurality of parts of the rotary electric machine for introducing and guiding the cooling air blown by the fan into the machine. Using the mounting bolt holes,
A support plate provided with a lifting metal fitting for lifting the fan guide is connected by bolts, and the support plate, which is bolted, is fixed to the outer circumference of the rotor shaft so as to be slidable in the circumferential direction. The structure is fixed.
As a result, without manually moving the fan guide to a predetermined position of the stator frame by hand, unlike the conventional case,
Since the mounting and assembling can be performed, it is possible to reduce the man-hours and time for the mounting work without providing a working space for mounting the fan guide, and to reliably and safely assemble and install the fan guide, which is a heavy load.

Further, the supporting plate provided with the above-mentioned lifting metal for lifting the fan guide is fixed to the fixing metal plate by moving the supporting metal plate in the circumferential direction of the rotor shaft by bolting each of the two metal pieces. Attaching and assembling the fan guide to the lower side of the child frame is easy, and at the same time,
The fixing bracket can be easily removed after installation. The jig for assembling the fan guide of the present invention can be used not only for assembling and assembling the fan guide to the stator frame, but also as a jig for removing the fan guide assembled to the stator frame. Further, there is an advantage that the air shield 10 (FIG. 3) arranged so as to face the fan guide can be used as a jig for attaching and detaching the air shield 10 to and from the stator frame.

[Brief description of drawings]

FIG. 1 is an explanatory view of attaching a fan guide to a stator frame with an assembly jig showing an embodiment of the present invention.

FIG. 2 is a partial cross-sectional view taken along the line II-II in FIG.

FIG. 3 is a sectional view of an air-cooled turbine generator.

FIG. 4 is a front view of a fan guide.

[Explanation of symbols]

 2 rotor shaft 3 fan 4 stator frame 7 fan guide 7a fan guide 7b fan guide 14 support plate 15 lifting jig 17 fixing plate 18 hanging jig 23 fixing bracket

Claims (2)

[Claims] 1. A stator frame is divided into a plurality of fan guides for introducing cooling air blown by a fan provided on a rotor shaft of a rotating electric machine into the machine and covering the outer circumference of the fan. In a fan guide assembly jig that is mounted and assembled with bolts, respectively, a support plate that supports the fan guide that is attached by bolts using stator frame attachment bolt holes provided on the outer peripheral surface of the fan guide divided into a plurality of pieces. A supporting metal fitting attached to the supporting plate and a fixing metal fitting slidably in the circumferential direction of the rotor shaft to support the supporting plate and the hanging metal fitting. The plate is attached to the fixing bracket by hoisting the hanging bracket, and the fixing bracket is moved in the circumferential direction of the rotor shaft to rotate the fan guide divided into predetermined positions on the stator frame. Fan guide assembly jig of a rotating electric machine, respectively, characterized in that to allow the assembly at. 2. The jig for assembling a fan guide for a rotating electric machine according to claim 1, wherein the fixing metal fittings slidably arranged in the circumferential direction of the rotor shaft are each a semicircular metal fitting divided into two parts. A jig for assembling a fan guide for a rotating electric machine, characterized in that a fixing portion for supporting the support plate and the hanging metal fitting is provided on the outer peripheral surface of one semicircular metal fitting piece.