JP2003020908A - Supporting device for inspecting and maintaining turbine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily perform inspection and maintenance operation of a turbine by minimizing movement of the turbine to save a fine adjustment operation for aligning a shaft center. SOLUTION: Both end parts of a shaft T1 of the turbine installed in an electric power plant or the like are supported by a pair of supporting devices 1. A rack 2 of the supporting device 1 can adjust height thereof by a level adjustment block B and a hydraulic height adjustment device 3. Support rollers 8, 8 mounting the turbine shaft T1 on upper part thereof are rotatably provided on the rack 2. The support rollers 8, 8 are rotated by a motor 9. An attachable and detachable band 15 to be wound around the turbine shaft T1 is locked on the rack 2 at a position corresponding to the support rollers 8, 8. The band 15 is wound around the turbine shaft T1 through a copper plate 16 for protection from contact with the support roller 8 and a metal ring 17 and the supporting device 1 is arranged in such a manner of rotating around the shaft from an upper part to a lower part of the turbine shaft T1. Inspection and maintenance are performed while floating the turbine shaft T1 by the hydraulic height adjustment device 3 and slowly rotating the support rollers 8, 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a support device for supporting a turbine shaft instead of a bearing and slowly rotating the turbine in order to maintain and inspect the outer circumference of an existing turbine.

[0002]

2. Description of the Related Art Conventionally, a turbine is installed in a facility surrounded by its installation site. Therefore, for inspection and maintenance work, the turbine is released from its bearing, lifted by an overhead crane, and moved from the installation site. Then, the turbine shaft is placed and placed on a support stand installed in a place where there is no obstruction equipment. The support base is provided with a guide roller, and the turbine shaft is supported by the guide roller and rotated.

[0003]

In the above-mentioned conventional turbine inspection and maintenance work, a large and heavy turbine must be moved to a work place for a long distance, which makes the work difficult and requires large-scale equipment. I am trying. In particular, since it moves to another place, the turbine may be inadvertently damaged unless the moving work is done carefully, and the core must be realigned when returning to the original installation position. Therefore, the present invention makes the movement of the turbine as small as possible, makes it relatively small and lightweight, facilitates handling, and facilitates centering without damaging the turbine for easy inspection and maintenance work. It is an object of the present invention to provide a support device for inspecting and maintaining a turbine capable of performing the above.

[0004]

In order to solve the above problems, in the first invention, the shaft T1 of an existing turbine is supported instead of a bearing, and the turbine is slowly rotated to inspect and maintain the entire circumference. The support device 1, which is a height-adjustable pedestal 2 that is directly or indirectly placed on the ground
In addition, a pair of opposing support rollers that support the turbine shaft T1 together are rotatably supported around an axis line in the same direction as the turbine shaft T1, and at least one of them is driven to rotate. Removable band 15
Supporting device for inspecting and maintaining the turbine so that both ends of the turbine are locked, and the installation route of the gantry 2 is fixed by being wound around the turbine shaft T1 and the gantry is moved around the shaft to be arranged below the turbine shaft. Configured 1. In the second aspect of the invention, the hydraulic height adjusting device 3 is provided below the pedestal 2. In the third invention, the pedestal 2 has auxiliary legs 4 for preventing a fall.
Was set up. In the fourth aspect of the invention, the protective member for protecting the turbine shaft T1 from the contact with the supporting roller is interposed.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described with reference to the drawings. 1 to 3, the pair of supporting devices 1 supports both ends of a shaft T1 of a turbine installed in a power plant or the like at an existing installation site of the turbine.
The support device 1 includes a pedestal 2 which is placed on the floor surface of the installation facility via the level adjustment block B. The level adjustment block B roughly adjusts the height of the support device 1 when supporting the shaft T1 of the turbine.

The pedestal 2 has a box-like shape which is recessed in a substantially arc shape so that the turbine shaft T1 is placed and received on the upper part thereof. A hydraulic height adjusting device 3 is provided on the lower surface of the gantry 2. As shown in FIG. 4, the hydraulic height adjusting device 3 is configured by connecting a hydraulic pump 3b, a pressure gauge 3c, and a check valve 3d to a cylinder 3a provided on the lower surface of the gantry 2. The height adjusting device 3 can raise the position of the gantry 2 after the supporting device 1 is arranged below the turbine shaft T1, and can float the turbine shaft T1 by mounting it.

An auxiliary leg 4 having a length adjustable for mounting and stabilizing it on the level adjusting block B is provided at the front part of the gantry 2 in the axial direction of the turbine shaft T1. Auxiliary leg 4
Respectively project from both sides of the gantry 2 to the front, are aligned in the horizontal direction, and extend in the vertical direction. As shown in FIG. 2, the auxiliary leg 4 has a fixed cylinder 5 having a plurality of adjustment holes 5a in the length direction.
And the leg body 7 that is inserted into the fixed cylinder 5 and projects downward
And the fixing pin 7 penetrating through the adjustment hole 5a and the pin hole provided on the way of the leg body 7. For the auxiliary leg 4, the adjustment hole 5a is appropriately selected to change the protruding length of the leg body 7,
Level adjustment block B by inserting and fixing
It prevents the gantry 2 placed on the top from falling forward.

Support rollers 8 and 8 are provided on both sides of the inside of the frame 2.
Are rotatably supported. The supporting rollers 8 and 8 are arranged so as to be slightly exposed from the upper surface of the gantry 2, and are pivotally supported so that the supporting rollers 8 and 8 cooperate to carry and receive the turbine shaft T1 and rotate about the shaft. Support rollers 8, 8
A drive mechanism is attached to the. The drive mechanism includes a motor 9, a speed reducer 10, a drive gear 11, a transmission gear 12, a tension gear 13, and a transmission chain 14. The motor 9 is fixed to the front surface of the pedestal 2. Reducer 10
Is also provided adjacent to the motor 9 on the front surface of the gantry 2 and is connected to the shaft of the motor 9. The drive gear 11, the transmission gear 12, and the tension gear 13 are rotatably supported in the frame 2. The drive gear 11 is attached to the speed reducer 10, and the transmission gear 12 is attached.
Are connected to supporting rollers 8 and 8, respectively. The tension gear 13 is interposed between the gears 11 and 12. The transmission chain 14 is wound around the gears 11, 12, and 13 so as to mesh with each other.

Between the two end portions of the pedestal 2, support rollers 8,
8, a detachable band 15 that is wound around the turbine shaft T1 is locked. The band 15 has an annular shape that is continuous with the gantry 2 and is wound around the turbine shaft T1.
The movement path is regulated so that the gantry 2 gradually changes its position around the axis from the upper side and moves downward. As shown in FIG.
A copper plate 16 and a metal ring 17, which are protective materials for avoiding direct contact with the support roller 8 and protecting the turbine shaft T1, are wound around the turbine shaft T1. Then, the band 15 is wound around the copper plate 16 and the metal ring 17. The copper plate 16 and the metal ring 17 are each composed of a pair of half-divided elements, and are attached by abutting both ends. The metal ring 17 is fixed by bolts by abutting the ends of the half elements together.

In this supporting device 1, the turbine shaft T1 which is still installed in the power plant or the like is released from the bearing,
The half element of the ring 17 is attached to the turbine shaft T1 by bolting, and the copper plate 16 is further inserted between the ring 17 and the turbine shaft T1. Then, the supporting device 1 is hoisted by a chain block or the like (not shown), the band 15 is attached around the ring 17, and the supporting device 1 is arranged above the turbine shaft T1. Band 1 around the ring 17
When 5 is mounted, the support rollers 8 and 8 also match the position of the ring 17. While operating the chain block to hold the gantry 2, as shown in FIG. 6, the chain block is rotated around the turbine axis T1 and arranged downward. Then, in advance, the turbine axis T
1, mount the pedestal 2 on the level adjustment block B arranged below 1, and remove the band 15 to stabilize the pedestal 2 with the turbine shaft T1 still floating by adjusting the balance with the auxiliary leg 4 to prevent the fall. . The above operation is also performed at the position on the other end side of the turbine shaft T1. Next, the height adjusting device 3 is operated by operating the hydraulic pumps 3b of the supporting devices 1 and 1 on both sides of the turbine shaft T1.
Then, the gantry 2 is raised respectively, and the turbine shaft T1 is slightly floated from the bearing. After the turbine shaft T1 is supported by the supporting devices 1 and 1, the supporting rollers 8 and 8 are driven by the motor 9 to slowly rotate the turbine T, the periphery thereof is inspected, and maintenance work is performed as necessary. Since the ring 17 and the copper plate 16 are interposed between the turbine shaft T1 and the support rollers 8 and 8, the turbine shaft T1 is not damaged by the contact between the support rollers 8 and 8. After the maintenance and inspection work is completed, the support device 1 is removed in the reverse order of the above. That is, the gantry 2 is lowered by the height adjusting device 3 of the supporting devices 1 and 1, respectively, and the turbine shaft T
Place 1 on the bearing. Ring 17 on turbine axis T1
After attaching the band 15 to the, the auxiliary leg 4 is reduced to hold the support device 1 above the level adjustment block B by a chain block or the like, and is rotated around the turbine axis T1 so as to be lifted upward. After the removal, the support device 1 is separated from the turbine shaft T1 and the ring 17 and the copper plate 16 are removed.

[0011]

As described above, according to the present invention, since it is sufficient to slightly move the turbine back up, the fine adjustment work for centering can be omitted, and the turbine is not damaged. This has the effect that inspection and maintenance work can be performed, and the device can be configured to be relatively small and lightweight.

[Brief description of drawings]

FIG. 1 is a front view of a support device according to the present invention.

FIG. 2 is a side view of a supporting device.

FIG. 3 is a plan view of a supporting device.

FIG. 4 is a configuration diagram of a hydraulic device.

FIG. 5 is an exploded view of the band in a mounted state.

FIG. 6 is a front view of the supporting device showing an installation process of the supporting device.

[Explanation of symbols]

1 Support device 2 mounts 3 Height adjustment device 4 auxiliary legs 8 Support rollers 9 motors 15 bands 16 Copper plate 17 ring T1 turbine shaft B level adjustment block

[Procedure amendment]

[Submission date] August 7, 2001 (2001.8.7)

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0002

[Correction method] Change

[Correction content]

[0002]

2. Description of the Related Art Conventionally, since a turbine is installed in equipment surrounded by its installation site, the rotor is released from the bearing and hoisted by an overhead crane or the like to move it from the installation site especially during maintenance work. The rotor shaft is placed on a support stand with rotating rollers installed in a place where there is no obstruction equipment. On the other hand, in the case of inspection and maintenance of a rotor that requires relatively simple work such as checking the rotor misalignment, simply lift the rotor on the spot with a hydraulic jack and then replace the flange on the end of the rotor shaft. The suspension wire is locked on the side part, and it is pulled up by an overhead crane and rotated little by little. When inspecting only the rotor bearing, the rotor is supported by a hydraulic jack instead of the bearing and the bearing is removed.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] 0003

[Correction method] Change

[Correction content]

[0003]

The above-mentioned conventional turbine inspection and maintenance work requires a careful and difficult work using large-scale equipment for moving a large and heavy rotor, so inspection and maintenance work is required. Depending on the contents of the above, if the rotor can be floated from the bearing and rotated on the spot, the work is simple, safe and convenient. Also, when returning to the original position, alignment becomes easy. Therefore, the present invention makes the movement of the rotor as small as possible and makes it relatively small and lightweight for easy handling, and also allows easy centering without damaging the rotor, and easy inspection and maintenance. An object of the present invention is to provide a support device for inspecting and maintaining a turbine that can perform work.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Yoshifumi Kobori             2703 Nakaokamoto, Kawachi Town, Kawachi District, Tochigi Prefecture             Ki Utsunomiya Factory

Claims (4)

[Claims] 1. A support device for supporting an existing turbine shaft in place of a bearing, slowly rotating the turbine to inspect and maintain it over the entire circumference, and the height of which is directly or indirectly mounted on the ground. An adjustable pedestal and a turbine shaft that face each other so as to receive the turbine shaft in cooperation with each other,
A pair of support rollers rotatably supported on the pedestal around an axis line in the same direction as the turbine shaft, at least one of which is rotatably drivable, and both ends of which are respectively locked to the pedestal and hung on the turbine shaft. A support device for inspecting and maintaining a turbine, comprising: a detachable band for rotating and fixing the installation path of the gantry, moving the gantry around the axis, and disposing the gantry below the turbine shaft. 2. A support device for inspecting and maintaining a turbine according to claim 1, wherein a hydraulic height adjusting device is provided in a lower portion of the gantry. 3. The turbine inspection / maintenance support device according to claim 1, wherein the mount is provided with auxiliary legs for preventing the mount from falling. 4. The turbine inspection according to claim 1, wherein the turbine shaft is wound around by interposing a protective material for protecting the turbine shaft from contact with a supporting roller.
Support device for maintenance.