JPS602057A - Lifting method of generator - Google Patents

Abstract

PURPOSE:To facilitate the disassembling and lifting of a generator by providing a tubular skeleton having a cotter hole in the generator, inserting a jack into the skeleton to engage a cotter within the cotrer hole, retaining the jack, and then elongating the jack. CONSTITUTION:After a stator 7 is placed on a floor 1, a hydraulic cylinder 9 of long stroke is inserted into an inserting hole 13a of a tubular skeleton 13 formed at a frame 8. Then, a cotter 14 is engaged within the cotter hole 13b formed at the side wall of the skeleton 13, and the top of the hydraulic cylinder 9 is secured by the cotter 14. Then, the cylinder 9 is driven, a piston rod 9a is elongated downward, and the entire stator 7 is raised by the reaction. A supporting rod 10 is supported to the lower portion of the stator 7 to fixedly hold it in the prescribed height. In this manner, the disassembling, repairing and inspecting works of a generator can be facilitated.//

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for easily pushing up a large vertical shaft generator during disassembly and inspection.

In order to reduce the crane capacity of water turbine generators and motor generators with thick vertical shafts, the rotor is divided into a yoke, magnetic poles, snow eider, and shaft, and the stator is assembled into a single unit and suspended, installed, disassembled, and This allows for assembly.

Incidentally, the work of replacing the stator coils, etc. of this type of generator has conventionally been carried out in the manner shown in FIGS. 1 and 2. That is, the entire generator is placed on the floor 1 as shown in FIG. As shown, the stator 7 is lifted upward by a hydraulic jack 9 installed on its frame 8, and a plurality of inserts 10 are placed underneath to hold the stator 7 at a desired height.

Then, the stator core 11 of the stator 7 is in the state shown in FIG.
The stator coil 12 wound around the car was replaced with a new one.

However, this method causes the following inconveniences. That is, since the hydraulic jack 9 is supported by the frame 8, the stroke of the hydraulic jack 9 is limited.
The amount lifted per turn was small and work efficiency was poor. In addition, in order to lift the stator 7 to a predetermined height, it was necessary to stack the objects 10 many times, and furthermore, the hydraulic jack 9 had to be attached from the side of the frame 8, resulting in poor workability.

The present invention has been made to effectively eliminate such inconveniences, and its purpose is to efficiently disassemble and assemble operations.
Furthermore, the present invention provides a method for pushing up a thick vertical shaft generator that can be carried out with good work efficiency.

In order to achieve such an object, the present invention provides a generator with a tubular bone having at least one cock hole, and a jack is inserted into the tubular bone from above, and the cock is inserted into the cock hole. It is characterized by holding down the jack, extending the jack and pushing up the generator together with the tubular bone r.

A preferred embodiment of the present invention will be described below in detail with reference to the accompanying drawings.

Figures 3, 4, and 6 are cross-sectional explanatory diagrams showing in order the replacement work of the stator coil of the generator according to the present invention, and Figure 5 is an enlarged cross-sectional view 1111 on the be.

First, to explain the structure of the stator 7, the frame 8 of
As shown in the figure, a tubular bone 13 is formed having an insertion hole 13a penetrating in the axial direction, and a plurality of cock holes 13b are provided in the side wall of the tubular bone 13. In addition, 1 in the figure
Reference numeral 1 is a stator core, and 12 is a stator coil, which are the same as those of the conventional one.

Next, the replacement work of the stator coil 12 of this generator will be explained.

After placing the stator 7 on the floor 1 as shown in FIG. 3, the insertion hole 13 of the tubular bone 13 provided in the frame 8 as shown in FIG.
A long hydraulic cylinder 9 with a long upward stroke
, and then as shown in FIG.
l Fit the kotsuta 14 into the kotsuta hole 13b drilled in the wall,
The upper end of the hydraulic cylinder 9 is fixed by the lever 14.

Next, as shown in FIG. 6, when the hydraulic cylinder 9 is driven to extend the piston rod 9a of the cylinder 9 downward,
The entire stator 7 moves upward due to the reaction. Then, when the fixed constant 7 reaches a predetermined height position, an inclusion lO is stacked below the stator 7 to fix and hold it at a predetermined height.

If the stator coil 12 is replaced with a new one in the state shown in FIG. 6, the replacement work can be carried out with good work efficiency.

In the above, since a cylinder with a long stroke can be used as the hydraulic cylinder 9, the stator 7 can be lifted up to a predetermined height position with one operation of the hydraulic cylinder 9, and therefore the intermediate object 10 can be lifted up. There is no need to pile up many sheets, further improving work efficiency.

Further, since the hydraulic cylinder 9 can be easily set into the insertion hole 13a of the tubular bone 13 from above, work efficiency is significantly improved.

As is clear from the above description, according to the present invention, a tubular bone is formed in the frame of the stator, and at least one cock hole is bored in the tubular bone, and this is used to push up the generator. Therefore, the working efficiency and workability of disassembling and assembling the electric motor can be significantly improved.

[Brief explanation of the drawing]

Figures 1 and 2 are broken IVi side views of the main parts of the generator, showing the replacement work of the fixed child coil in a conventional power generation system, and Figures 3 and 4.
Figures 6 and 6 are cross-sectional views showing the replacement work of the stator coil of a generator according to the present invention in that order, and Figure 5 is a diagram showing Figure 4 v.
-v line enlarged sectional view. In the drawing, 2 is a yoke, 3 is a magnetic pole, 4 is a spider, 5 is a shaft, 6 is a rotor, 7 is a stator, 8 is a frame, 9 is a hydraulic cylinder, 10 is an insert, 11 is a stator core, 12111, stator coil; 13, tubular bone; 13a, insertion hole; 13b, socket hole; 14, socket. Figure 6-263-

Claims (1)

[Claims] While providing the generator with a tubular bone having at least one cock hole, a jack is inserted into the tubular bone from the upper side, the cock is inserted into the cock hole and the jack is pressed down, and then the jack is extended. A method for pushing up a generator, which is characterized by pushing up the power generator integrally with the tubular bone Σ.