JPH0241644A - Centering method of vertical-shaft rotary electric machine - Google Patents

Abstract

PURPOSE:To conduct centering easily by pushing the side surfaces of a bearing bracket and a stator by a screw installed to a centering tool hung to the head section of a bolt for fixing an upper bearing bracket by its own hole and adjusting a position. CONSTITUTION:The hanging hole 8 of a centering tool 5 is hung to the head section of a bolt 3 fastening an upper bearing bracket 1. The bolt 3 is kept loosely clamped. Set screws 6 and 7 are mounted to the tool 5, and the screw 6 is screwed to the upper bearing bracket 1 and the screws 7 to a state frame 2 until the tool 5 is brought into contact with the stator frame 2. The screw 6 is screwed before the upper bearing bracket 1 is moved, and the screws 7 are screwed before the stator frame 2 is shifted. Centering is completed, the bolt 3 is clamped, and the screws 6, 7 and the tool 5 are removed. Accordingly, space for centering operation is unnecessitated, thus improving the operating efficiency of centering.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a method for centering a vertical shaft rotating electric machine or the like.

(Prior Art) In general, this has been done by pressing the stator frame of a vertical shaft rotating electric machine, for example, a normal water turbine generator, with a push screw.

A method for centering a water turbine generator equipped with a centering device will be explained with reference to FIGS. 3 and 4.

In Fig. 3, the centering of the upper bearing bracket 1 is done by using the push screw Kawadoko 10 provided on the arm portion of the upper bearing bracket 1 and the push screw 9 attached to this seat, and by pressing and moving the stator frame 5. It was done by

(Problem to be Solved by the Invention) This push screw 9 and seat 10 must be taken into consideration in advance when designing the generator, and it is also necessary to provide the push screw between the upper bearing bracket 1 and the stator frame 5. It is necessary to provide more space and to increase the distance when designing the protective cover 8, etc., which are factors that adversely affect the performance of the generator.

The present invention has been made in view of the above-mentioned drawbacks, and it is possible to make the chamber-shaft rotating electric machine more compact and to have greater freedom in design, which was previously impossible due to the necessity of attaching centering parts to the arm part of the upper bearing bracket. It is an object of the present invention to provide a centering method that allows easy disassembly, assembly, and centering of a chamber-shaft rotating electric machine.

[Structure of the invention]

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides that the hook for the head of the upper bearing bracket fixing bolt has a hole, a push screw for pressing the side surface of the bearing bracket, and a stator side surface for fixing the upper bearing bracket. After hooking the hole of the centering tool equipped with a push screw to the head of the loosely tightened upper bearing bracket fixing bolt, the upper bearing bracket side and stator side are attached to the centering tool. The present invention is characterized in that the bearing bracket or the stator frame is moved by adjusting the push screw to center the chamber shaft rotating electric machine.

(Function) Since the present invention is constructed as described above, there is no need to provide a seat for a push screw and a push screw on the arm portion of the upper bearing bracket, and the centering tool can be removed after centering is completed, so it can be used indoors. Centering can be easily performed when assembling the shaft-rotating electric machine, and no centering space is required between the upper bearing bracket and the stator frame.

(Example) An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of the upper bearing bracket mounting portion of a regular water turbine generator with a centering tool according to the present invention installed, and FIG. 2 is a side view of FIG. 1. When assembling the generator main engine, the upper bearing bracket 1 is placed on the stator frame 2 and lightly tightened with bolts 3 and spring washers. A centering tool 5 having a hole in the head of the bolt 3 and a push screw 6 for pushing the upper bearing bracket 1 and a push screw 7 for pushing the stator frame 2 is hooked on the head of the bolt 3. and placed on top of the upper bearing bracket 1. Here, the push screw 6 and the push screw 7 are screwed in until they come into contact with the outer peripheral surfaces of the upper bearing bracket 1 and the stator frame 2, respectively. In the centering work, when it is necessary to move the upper bearing bracket 1, the set screw 6 of the centering tool 5 can be screwed in by the required amount. Also, since the bolt 3 is screwed into the stator frame 2, the set screw 6
When screwed in, the centering tool 5 receives a reaction force transmitted to it, and at the same time, the set screw 7 of the centering tool 5 also receives a reaction force. Therefore, the upper bearing bracket 1 can be moved and centered in the radial direction on the mounting surface on the data frame 2. If it is necessary to move the stator frame 1, it can be moved in the same manner as described above by screwing in the push screw 7. Further, after the centering work is completed, the centering tool 5 can be easily removed by loosening the push screws 6.7 of the centering tool 5 and removing the hooking part from the bolt 3.

In this way, the centering tool 5 can easily perform centering by being attached to the generator body only during centering, and can be easily removed even after centering is completed.
The space for the seats and push screws that were attached by welding between the stator frame 2 and the stator frame 2, and the space required for centering work are no longer required, making it possible to make the generator body more compact, and further shortening the distance between the bearings. This will lead to improved generator performance.

〔Effect of the invention〕

As explained below, according to the present invention, centering can be performed using a centering tool that can be easily installed and removed, which saves space for installing centering parts between the upper bearing bracket and the stator frame and the centering work. Since the required space is not required and the distance between the bearings can be shortened, it is possible to provide a compact and high-performance chamber shaft rotating electric machine.

[Brief explanation of the drawing]

Fig. 1 is a main part configuration diagram for explaining the centering method of a chamber shaft rotating electric machine equipped with a centering tool according to an embodiment of the present invention, Fig. 2 is a side view of Fig. 1, and Fig. 3 is a conventional FIG. 4 is an enlarged view of the main part of FIG. 3. 1. Upper bearing bracket, 2. Stator frame, 3. Bearing bracket fixing bolt, 4. Spring washer, 5. Centering tool, 6.7.
・Push screw.

Claims (1)

[Claims] The centering tool has a hook hole for the head of a bolt for fixing the upper bearing bracket and the stator frame, and includes a push screw that presses the side surface of the bearing bracket, and a push screw that presses the side surface of the stator frame. A method for centering a vertical shaft rotating electrical machine, characterized in that centering is performed by hooking a hole portion onto the head of the loosely tightened bolt and adjusting each of the push screws provided on a centering tool.