JPH05227706A - Lifting method for stator at the time of assembling water-wheel generator - Google Patents

Abstract

PURPOSE:To eliminate a problem in the case of using a wire rope by lifting a stator by a rotor lifting fitting in contact from a lower surface of an upper bearing bracket mounted on an upper surface of the stator to the bracket. CONSTITUTION:A rotor lifting fitting 1 mounted at a crane 3 is disposed under a center of a stator 5. Further, an upper bearing bracket 6 is clamped fixedly to an upper surface of the stator 5. The stator 5 is lifted by lifting the fitting 1 by driving the crane 3, bringing it into contact with a lower surface of the bracket 6 and simultaneously lifting the bracket 6 and the stator 5. Accordingly, it is not necessary to engage the stator 5 with a wire rope and does not need large lifting of the crane 3 for assuring its safe lifting angle. Further, since the bracket 6 rigidly maintains a bore of the stator 5, there is no fear of deforming it in the case of lifting the stator 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stator hoisting method for assembling a turbine generator installed in a hydraulic power plant.

[0002]

2. Description of the Related Art Usually, when assembling large parts of a water turbine generator, hoisting metal fittings or wire ropes are used and hoisting is carried out by a crane.

2 (a) and 2 (b) show a mode of a conventional hoisting and moving construction method. FIG. 2A shows a mode of hoisting movement of the rotor. The hoisting metal fitting 1 is attached to the rotor 2, and the hook of the crane 3 is hooked on the hoisting metal fitting 1.
The crane 3 is driven to lift and move. 2B shows a mode of hoisting movement of the stator 5, in which the wire rope 4 is attached to the stator 5.
, The hook of the crane 3 is hooked on the ear rope 4, and the crane 3 is driven to be lifted and moved.

[0004]

In the case of the above-mentioned stator hoisting, the crane 3 must have a sufficient height in order to ensure a safe hoisting angle of the wire rope 4.
Therefore, the installation height of the crane also becomes large, and the height of the building of the power plant must be increased. Also,
When the stator 5 is lifted, the wire rope 4 exerts a force on the stator 5 toward the center of the stator 5. The stator 5 may be deformed by the above force, and it is necessary to attach the lining support 7 to the stator 5 as shown in FIG. 2B to prevent the deformation.

The present invention has been made in view of the above circumstances, and the crane can be safely hoisted without unnecessarily increasing the hoisting height, and the stator can be deformed without attaching a lining support. Provided is a stator hoisting method at the time of assembling a water turbine generator, which is free from the possibility of occurrence of a problem.

[0006]

According to the stator hoisting method for assembling a turbine generator of the present invention, a rotor hoisting metal fitting attached to a crane is arranged at the center of the lower part of the stator, and an upper part having an opening at the center is provided on the upper surface of the stator. The bearing bracket is fixed, the rotor lifting metal fitting is lifted by a crane and brought into contact with the lower surface of the upper bearing bracket,
It is characterized by hoisting the stator.

[0007]

In the stator hoisting method for assembling the water turbine generator according to the present invention having the above-described structure, the rotor hoisting metal fitting abutting from the lower surface of the upper bearing bracket mounted on the upper surface of the stator hoists the stator. It is not necessary to use the wire rope unlike the hoisting construction method, and various problems associated with the use of the wire rope do not occur.

[0008]

1 is a front view of an embodiment of the present invention in which the same parts as those in FIGS. 2 (a) and 2 (b) are designated by the same reference numerals. In this figure, the rotor lifting metal fitting 1 attached to the crane 3 is arranged below the center of the stator 5. Further, the upper bearing bracket 6 is provided on the upper surface of the stator 5.
Is tightened and fixed.

The lifting of the stator 5 is performed as follows. That is, the crane 3 is driven to hoist the rotor hoisting metal 1, and this is brought into contact with the lower surface of the lower bearing portion racket bracket 6 to hoist the lower bearing bracket 6 and the stator 5 at the same time.

According to the above-mentioned hoisting method, it is not necessary to hang the wire rope 4 around the stator 5, and it is not necessary to hoist the crane 3 to secure a safe hoisting angle. Therefore, it is not necessary to increase the installation height of the crane, and a power station building with a low height can be used. This will reduce the cost of constructing the power plant.
Further, since the upper bearing bracket 6 firmly maintains the inner diameter of the stator 5, there is no risk of deformation when the stator 5 is lifted, and it is not necessary to prepare the lining support 7.

The present invention is not limited to the above embodiment. For example, it can be applied to the lifting work of a stator in a generator manufacturing plant, and it is possible to achieve an effect in terms of cost reduction and quality maintenance.

[0012]

As is apparent from the above, in the stator hoisting method at the time of assembling the turbine generator of the present invention, power generation is achieved by reducing the construction cost of the power plant building, lining support, elimination of the wire rope for hanging. The construction cost can be greatly reduced.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of the present invention.

FIG. 2 (a) is a diagram showing a mode of hoisting movement of a rotor,
FIG. 6B is a diagram showing a mode of lifting movement of the stator.

[Explanation of symbols]

1 ... Rotor lifting metal fittings, 2 ... Rotor, 3 ... Crane, 4 ...
Wire rope, 5 ... Stator, 6 ... Upper bearing bracket, 7 ... Lining support.

Claims (1)

[Claims] 1. A rotor lifting metal fitting mounted on a crane is arranged at the center of the lower part of the stator, an upper bearing bracket having an opening at the center is fixed to the upper surface of the stator, and the rotor lifting metal fitting is lifted by a crane. A stator hoisting method at the time of assembling a water turbine generator, characterized by bringing this into contact with the lower surface of the upper bearing bracket and hoisting the stator.