JPH09233772A - Rotor attaching/detaching method for rotary motor and device thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attach/detach a rotor from a stator which forms a motor easily. SOLUTION: To insert a rotor 12 into a stator 14A, a rotor 12 is lifted by a crane 34 for perpendicular load support. The center-hole type jack 26 of a balance beam 24 is operated to haul a strand wire 32. The strand wire 32 is engaged with an attaching/detaching surface 20, therefore, the center-hole type jack 26 moves with its own operation. The balance beam 24 is fitted at the rotor 12, thus moving the rotor 12 in the axial direction of the rotor 12 and permitting the rotor 12 to be inserted into the stator 14. An attaching/ detaching hole 22 and the rotor 12 are prevented from contacting each other by the individual operation of the right and left center-hole shaped jack 26. The drawing-out work of the rotor 12 is conducted by reversely-fitting the balance beam 24 onto the rotor 12 and engaging the strand wire 32 at an anchor surface which faces the attaching/detaching surface 20. The hauling method of the center-hole type jack 26, the operation of the crane 34 and so on is the same as that at the time of inserting.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of attaching / detaching a rotor of a rotary generator or a device adopting the same, and more particularly to a jack which can be attached to the rotor side of a rotary generator. The present invention relates to a rotary generator rotor attaching / detaching method and device incorporated in a holding member.

[0002]

2. Description of the Related Art Conventionally, rotary generators have been used in power plants and the like. The structure of the rotary generator is divided into a fixed part and a rotating part, with the former side being the stator and the latter side being the rotor. The rotary generator is regularly maintained to ensure reliability. Maintenance of a rotary generator involves removing the rotor from the stator or attaching the rotor to the stator, which requires multiple workers (10 or more) to manually operate the chain block. I am using it. The size and weight of the rotor are, for example, 2 m in diameter and 1 in length.
It is 7 m long and weighs about 228 t.

Further, the above-mentioned measures are taken not only at the time of maintenance but also when newly installing a rotary generator.

[0004]

However, since the rotor is huge and heavy, it requires a lot of workers and time to attach and detach it by using a manual chain block, and it takes time for the workers. The burden was also heavy. And for that, a replacement was needed. For this reason, there are problems such as severe labor of workers, increase in labor hours, and increase in personnel costs due to the input of a large number of personnel.

The rotor attachment / detachment work is a work in which a plurality of manual chain blocks are connected and the rotor is pulled in or pulled out in the axial direction of the stator by each chain block. Due to the contents of this work, the amount of pulling in or pulling out of each chain block during the work was different, and the rotor sometimes swung to the left or right due to one-sided effect. Then, while the rotor is attached to or detached from the stator, the rotor may come into contact with each other in the narrow stator (a gap between the stator and the rotor is about 10 cm), and both may be damaged.

In the present invention, paying attention to the above-mentioned conventional problems, the number of workers is reduced, the working time is shortened, and the rotor can be attached and detached without contacting the stator. It is an object of the present invention to provide a rotor attaching / detaching method and device.

[0007]

In order to solve the above-mentioned problems, a rotor attaching / detaching method of a rotary generator according to the present invention comprises:
A method for attaching and detaching a rotor to and from a stator of a rotary generator, wherein a jack holding member having two or more jacks arranged on a concentric circle of the rotor shaft center is attached to the rotor tip,
The jack pulls the wire hooked on the anchor surface to move the rotor in the axial direction, and the suspending means for suspending the rotor moves in response to the jack holding member. It was decided to.

A rotor attaching / detaching device for a rotary generator according to the present invention is a device for attaching / detaching a rotor to / from a stator of a rotary generator, and has an anchor surface facing the axial center of the rotor. A wire hooked on the anchor surface, a jack for pulling the wire, and a jack holding member which is provided on two or more of the jacks on a concentric circle of the rotor shaft center and can be attached to the tip of the rotor. And a suspension means for supporting a vertical load of the rotor and movable in response to the jack holding member.

[0009]

According to the above construction, when the rotor is attached to or detached from the stator, the suspension is used to support the vertical load of the rotor. Here, a jack holding member is attached to the tip of the rotor, and two or more jacks are provided on the jack holding member at positions concentric with the rotor shaft center.

When the jack provided on the jack holding member at the tip of the rotor is operated from this state, the jack tries to pull the wire. However, since the wire is hooked on the anchor surface, the jack starts moving toward the anchor surface by its own movement. Further, since the rotor is attached to the holding member that holds the jack, the rotor also moves as the jack moves. Here, since the moving direction of the jack is aligned with the axial direction of the rotor, the rotor can be attached to and detached from the stator by moving the jack. Also, when attaching or detaching the rotor,
By adjusting the moving speed of two or more jacks individually, it is possible to prevent the gap between the rotor and the stator from deviating, and to prevent the rotor and the stator from contacting each other during attachment / detachment work. You can do it.

Further, the suspension means can move in the moving direction of the jack together with the rotor while supporting the vertical load of the rotor.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Specific embodiments suitable for the rotor attaching / detaching method and apparatus of the rotary generator according to the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a schematic view of inserting the rotor into a stator using the rotor attaching / detaching device of the generator according to the embodiment, and FIG. 2 is a sectional view of FIG.

The rotary generator 10 to be worked is one that receives mechanical power from the outside to generate electric power. The rotary generator 10 is divided into a rotating portion and a fixed portion,
The former side is the rotor 12, and the latter side is the stator 14.

The rotor 12 has a cylindrical shape, and in this embodiment, the length is about 17 m, the diameter is about 2 m, and the weight is about 228 t. A bolt hole (not shown) is provided on the front end surface 16, which is one side of the rotor 12, so that a balance beam, which will be described later, serving as a jack holding member can be fixed.

In the stator 14, the side on which the rotor 12 is inserted and withdrawn is the attachment / detachment surface 20 which is the anchor surface during insertion.
At the center of the attaching / detaching surface 20, the rotor 1
An attachment / detachment hole 22 for attaching / detaching 2 is provided. The smaller the difference between the diameter of the attachment / detachment hole 22 and the outer shape of the rotor 12, the higher the power generation efficiency. Therefore, in the power generation device according to the present embodiment, the diameter of the attachment / detachment hole 22 corresponds to the outer shape of the rotor 12. On the other hand, the gap is set to be about 10 Cm.

In the rotary generator 10 as described above, when the rotor 12 is inserted into the stator 14, first, the balance beam 24, which serves as a jack holding member, is attached to the tip surface 16 of the rotor 12 with a tightening bolt. Use and fix. Next, the rotor 1 is attached to both ends of the balance beam 24 by using wires to be described later.
A center hole type jack 26, which serves as a jack for moving 2 horizontally, is attached. Here, the place where the center hole type jack 26 is attached to the balance beam 24 is such that the center hole type jacks 26 at both ends are located on a concentric circle from the axial center of the rotor 12. FIG. 3 is an internal structure and operation explanatory diagram of the center hole type jack 26. As shown in the figure, this center hole type jack 2
6 is a cylindrical hydraulic cylinder 26A having a wire path provided at the center in the longitudinal direction and capable of expanding and contracting in the wire direction.
And a front end chuck 26B and a rear end chuck 26C, which are arranged on both ends in the longitudinal direction of the hydraulic cylinder 26A and can grip a wire. Here, the hydraulic cylinder 26A and both chucks 26B and 26C can be operated by hydraulic pressure from a hydraulic pump unit 28 installed outside. Also, both chucks 26B, 2
6C is a protrusion 26D having an inclination in one direction at the portions of both chucks 26B and 26C that come into contact with the wire so that the wire can move only in one direction side when the wire is gripped.
Is provided. Using the center hole type jack 26 having such a structure, the procedure of moving to the anchor surface side along the wire whose one end is hooked on the anchor surface will be explained. First, hydraulic pressure is applied to the rear end chuck 26C. The wire is gripped, and the hydraulic cylinder 26A is operated to extend from this state, and the tip chuck 26B side is moved in the anchor surface direction. Then, this time, the wire is gripped by the front end chuck 26B, then the rear end chuck 26C is separated from the wire, and the hydraulic cylinder 26A is contracted. When such an operation is repeated, the center hole type jack 26 can move along the wire along the anchor surface.
The center hole type jack 26 described above is attached to the balance beam 2
Attaching to both ends of 4 and inserting the wire, the balance beam 2
No. 4 can be moved in the wire direction, and the left and right inclination of the balance beam 24 can be adjusted.

A pair of hanging metal fittings 30 for hooking the wire are attached to the attachment / detachment surface 20 of the stator 14 with the attachment / detachment hole 22 interposed therebetween. The end portion of the strand wire 32, which serves as a wire for moving and guiding the balance beam 24, is attached to the pair of suspension fittings 30.
It has been locked in each. Here hanging hardware 3
At the ends of the pair of strand wires 32 hooked at 0,
A clevis 32a, which is a U-shaped key, is attached. That is, the pair of strand wires 32 is attached to the hanging fitting 3
When hooking at 0, the clevis 32a is simply hooked on the hanging metal fitting 30 to complete. Therefore, the work time for attaching the strand wire 32 to the stator 14 side can be shortened. Also strand wire 3
2 is inserted into the above-mentioned center hole type jack 26, and as described above, the center hole type jack 26 can be moved toward the attaching / detaching surface 20 by operating the center hole type jack 26.

To lift the rotor 12 vertically from the stage 33 for storing the rotor 12 before insertion and move it to the attachment / detachment hole 22 of the stator 14, a crane 34 as a suspending means is used. To be The crane 34
The movable rail 34a is pulled in the direction in which the rotor 12 is inserted into the stator 14, and the crane 34 lifts the rotor 12 from the stage 33 using the suspension wire 35, and then follows the movable rail 34a. And is movable to the side of the stator 14. When the crane 34 approaches the side of the stator 14 and the tip of the rotor 12 is inserted into the attachment / detachment hole 22, the rotor rotor shoe 36 installed inside the attachment / detachment hole 22 holds the rotor 12. The rotor 12 has the attachment / detachment hole 2
It prevents contact within 2.

The procedure of inserting the rotor 12 into the stator 14 using the apparatus thus constructed will be described. First, the balance beam 24 is attached to the tip surface 16 of the rotor 12 by using a tightening bolt.
Attach. After the balance beam 24 is attached to the rotor 12, the crane 34 is attached to the rotor 1 using the moving rail 34a.
Move above 2. Then, the suspension wire 35 is hung on the rotor 12 on the stage 33, and both ends of the suspension wire 35 are hung on the crane 34. After the suspension is completed, the crane 34 is operated and the rotor 12 is pulled up above the stage 33. Then, the rotor 12 is inserted to a height at which the axis of the attachment / detachment hole 22 of the stator 14 and the axis of the rotor 12 coincide with each other.
The crane 34 is stopped and the crane 34 is stopped when the target height is reached.

After the rotor 12 is pulled up to the target height, the strand wire 32 is inserted through the center hole type jack 26 and the center hole type jack 2 is inserted.
6 and the hydraulic pump unit 28 are connected using a hydraulic hose. After these steps are completed, the hydraulic pump unit 28 is operated, and the pair of center hole type jacks 26 are operated so as to draw the strand wire 32 on the clevis 32a side. If you continue this operation,
Since the end of the strand wire 32 on the side of the clevis 32a is hooked on the stator 14, the slack is not present in the strand wire 32 sandwiched between the clevis 32a and the center hole type jack 26, and then the center hole type jack is removed. 26 moves to the side of the stator 14, which is the anchor side. Since the pair of center hole type jacks 26 are attached to both ends of the balance beam 24, the balance beam 24 also moves to the stator 14 side at the same time as the center hole type jack 26 moves. Further, at this time, since the rotor 12 is fixed to the balance beam 24, the rotor 12 also moves to the side of the stator 14 along with the movement of the center hole type jack 26 like the balance beam 24. . And this rotor 12 is the stator 1
The observer on the side of the rotor 12 sends a signal to the operator who operates the crane 34 while moving to the 4 side, and the operator who operates the crane 34 operates the crane 34 based on the signal. The rotor 12 is moved in the insertion direction so that the difference in relative position between the rotor 12 and the crane 34 is suppressed to a certain amount or less. Further, when the rotor 12 is inserted into the attachment / detachment hole 22, the rotor rotor shoe 36 installed in the attachment / detachment hole 22 receives the tip end side of the rotor 12, so the attachment / detachment hole 22
It is possible to prevent the rotor 12 from making contact inside.

In order to prevent the rotor 12 and the stator 14 from coming into contact with each other, an observer on the side of the rotor 12 always observes the left and right gaps between the rotor 12 and the attachment / detachment hole 22 during the work. doing. And the situation is shown in the hydraulic pump unit 28.
They are in constant contact with the workers who operate the. The worker who operates the hydraulic pump unit 28 who received the contact
Left and right center hole type jacks 2 by adjusting the gap
The moving speed of 6 is changed, and the hydraulic pump unit 28 is operated so that the left and right gaps become uniform. By such cooperation work, contact between the rotor 12 and the stator 14 can be prevented.

As described above, the center hole type jack 2
In response to the movement of 6, the crane 34 is moved, and the rotor rotor shoe 36 holds a part of the rotor 12 during the insertion. Furthermore, since the moving speed of the center hole type jacks 26 attached to both ends of the balance beam 24 is changed while monitoring the left and right gaps between the rotor 12 and the attachment / detachment holes 22, the rotor 12 is replaced with the stator 14. It can be securely inserted without contact. As a result, the labor load on the worker is reduced, and more rapid and reliable insertion work becomes possible.

FIG. 4 is a schematic view when the rotor 12 is pulled out from the stator 14 using the rotor attaching / detaching device of the generator according to the embodiment.

As shown in the figure, the balance beam 24 and the center hole type jack 2 used when the rotor 12 is inserted.
Attach 6 in the direction opposite to the insertion. In the present embodiment, the pair of wire ropes 4 is attached to the pillar 38 of the building.
Hook one end of 0. An anchor balance 42 serving as an anchor surface is hooked on the other end of the wire rope 40. At both ends of the anchor balance 42, hanging metal fittings 30 similar to those used at the time of inserting the rotor 12 are provided, and strand wires 32 are respectively attached to the hanging metal fittings 30 via clevis 32a. . The other configurations are the same as when the rotor 12 is inserted.

The procedure for pulling out the rotor 12 from the stator 14 using the apparatus thus constructed will be described. The hydraulic pump unit 28 is operated to pull the strand wire 32 on the clevis 32a side closer to each other. The hall type jack 26 is operated. When this operation is continued, the end portion of the strand wire 32 on the clevis 32a side is hooked on the anchor balance 42, so that the strand wire 32 sandwiched between the clevis 32a and the center hole type jack 26 is After the slack disappears, the center hole type jack 26 moves to the anchor balance 42 side which is the anchor side. Since the pair of center hole type jacks 26 are attached to both ends of the balance beam 24, the balance beam 24 also moves simultaneously with the movement of the center hole type jacks 26.
It moves to the 2nd side. Further, at this time, since the rotor 12 is fixed to the balance beam 24, the rotor 12 also moves to the anchor balance 42 side as the center hole type jack 26 moves, like the balance beam 24. During this pulling-out operation, the crane 34 is moved in response to the movement of the rotor 12, and the left and right gaps between the rotor 12 and the attachment / detachment holes 22 are attached to both ends of the balance beam 24 so as to be uniform. The point that the amount of movement of the center hole type jack 26 is adjusted is the same as the procedure when inserting the rotor 12.

After continuing the above operation and pulling out the rotor 12 from the stator 14, first, the hydraulic hose connecting the center hole type jack 26 and the hydraulic pump unit 28 is removed from the center hole type jack 26.
Next, in order to move the rotor 12 to the position of the stage 33 that serves as an installation table, a work of lifting the center of the rotor 12 by the crane 34 is performed. After completing these tasks,
The crane 34 is moved along the moving rail 34a, and the rotor 12 is moved to the position of the stage 33 which is the installation base. After the movement is completed, the crane 34 is lowered and the rotor 12 is lowered onto the stage 33.

In the case where the rotor 12 is pulled out, the anchor balance 42 has been described as an anchor surface in the present embodiment, but the same applies even if the pillars 38 of the building or the walls of the building (not shown) are configured as anchor surfaces. The effect is obtained.

As described above, also when the rotor 12 is pulled out from the stator 14, the labor burden on the worker can be reduced and the quick and reliable pulling-out work can be performed as in the insertion.

[0030]

As described above, according to the present invention, the rotor is suspended by the suspension means that responds to the movement of the jack and is movable in the jack moving direction. Then, a jack holding member for disposing two or more jacks on a concentric circle of the rotor shaft center is attached to the rotor tip, and the wire hooked on the anchor surface is pulled by the jack. Since the wire is hooked on the anchor surface, the jack moves along the wire by the movement of the jack in the axial direction of the rotor. Here, as the jack moves, the rotor also moves at the same time. By adopting such a rotor attachment / detachment mode, it is possible to reduce the labor burden on the worker and to perform quick and reliable attachment / detachment work.

[Brief description of drawings]

FIG. 1 is a schematic diagram when a rotor is inserted into a stator using a rotor attaching / detaching device.

FIG. 2 is a cross-sectional view when the rotor is inserted into the stator using the rotor attaching / detaching device.

FIG. 3 is an internal structure and operation explanatory diagram of a center hole type jack.

FIG. 4 is a schematic view when the rotor is pulled out from the stator by using the rotor attaching / detaching device.

[Explanation of symbols]

 10 Rotary Generator 12 Rotor 14 Stator 16 Tip Surface 20 Attachment / Detachment Surface 22 Attachment / Detachment Hole 24 Balance Beam 26 Center Hole Jack 26A Hydraulic Cylinder 26B Tip Chuck 26C Rear End Chuck 26D Projection 28 Hydraulic Pump Unit 30 Lifting Metal 32 Wire 32a Clevis 33 Stage 34 Crane 35 Hanging wire 36 Rotor rotor shoe 38 Pillar 40 Wire rope 42 Anchor balance

Claims (2)

[Claims] 1. A method for attaching / detaching a rotor to / from a stator of a rotary generator, wherein a jack holding member having two or more jacks arranged on a concentric circle of the rotor shaft center is attached to a tip of the rotor. Then, the jack pulls the wire hooked on the anchor surface to move the rotor in the axial direction thereof, and at the same time, suspending means for suspending the rotor responds to the jack holding member. A method for attaching and detaching a rotor of a rotary generator, which is characterized in that the rotor is moved. 2. A device for attaching / detaching a rotor to / from a stator of a rotary generator, which comprises an anchor surface facing the axial center of the rotor, a wire hooked on the anchor surface, and a pulling wire. And a jack holding member having two or more jacks arranged on a concentric circle of the rotor shaft center and attachable to the tip of the rotor, and a vertical load support for the rotor to support the jack holding member. A rotor attachment / detachment device for a rotary generator, comprising: a suspending unit that is movable in response.