JP4707272B2 - Support equipment for turbine inspection and maintenance - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a support device for slowly rotating a turbine by supporting a turbine shaft instead of a bearing in order to maintain and inspect the outer periphery of an existing turbine.
[0002]
[Prior art]
Conventionally, a turbine is incorporated in equipment surrounded by its installation location. Therefore, especially during maintenance work, the rotor is released from the bearing, lifted by an overhead crane, etc., moved from the installation location, and The work is done by placing the rotor shaft on a support base with a rotating roller installed in a place where there is no space.
[0003]
[Problems to be solved by the invention]
In the conventional turbine inspection and maintenance work, the large and heavy rotor needs to be moved with great care to move a large and heavy rotor. If it can be lifted and rotated from the bearing, the operation is simple, safe and convenient. In addition, when returning to the original position, the alignment becomes easy.
Accordingly, the present invention makes the movement of the rotor as small as possible, and is relatively small and light so that it can be handled easily, and the rotor can be easily aligned without damaging the rotor. An object of the present invention is to provide a support device for inspection and maintenance of a turbine capable of performing work.
[0004]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, in the first invention, a support device 1 that supports an existing turbine shaft T1 in place of a bearing and slowly rotates the turbine to inspect and maintain the entire circumference, directly or A pair of opposed support rollers that receive the turbine shaft T1 in cooperation with the height-adjustable mount 2 that is indirectly placed on the ground so as to be rotatable about an axis in the same direction as the turbine shaft T1. At least one of them is driven to rotate, and both ends of the band 15 that can be attached to and detached from the gantry 2 are respectively locked and hung around the turbine shaft T1 to fix the installation path of the gantry 2, and around the axis The support device 1 for inspection and maintenance of the turbine was configured so that the gantry was moved and arranged below the turbine shaft.
In the second invention, the hydraulic height adjusting device 3 is provided in the lower part of the gantry 2.
In 3rd invention, the auxiliary leg 4 for preventing the fall to the mount frame 2 was provided.
In the fourth invention, a protective member for protecting the turbine shaft T1 from contact with the support roller is interposed.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to the drawings.
1 to 3, the pair of support devices 1 support both ends of a turbine shaft T1 installed at a power plant or the like at an existing installation location of the turbine. The support device 1 includes a gantry 2 that is placed via a level adjustment block B on the floor surface of the installation facility. The level adjustment block B roughly adjusts the height of the support device 1 when supporting the turbine shaft T1.
[0006]
The gantry 2 has a box shape that is recessed in a substantially arc shape so that the turbine shaft T1 is placed on the top. 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 3 b, a pressure gauge 3 c, and a check valve 3 d to a cylinder 3 a provided on the lower surface of the gantry 2. The height adjusting device 3 can raise the position of the gantry 2 after the support device 1 is arranged below the turbine shaft T1, and can float the turbine shaft T1.
[0007]
An auxiliary leg 4 whose length can be adjusted to be placed on the level adjustment block B and to be stabilized is provided at the front of the gantry 2 in the axial direction of the turbine shaft T1. The auxiliary legs 4 protrude forward from both sides of the gantry 2 and extend in the vertical direction along the horizontal direction. As shown in FIG. 2, the auxiliary leg 4 includes a fixed cylinder 5 having a plurality of adjustment holes 5 a in the length direction, a leg body 7 that is inserted into the fixed cylinder 5 and protrudes downward, and in the middle of the leg body 7. And a fixing pin 7 penetrating the adjustment hole 5a. The auxiliary leg 4 appropriately selects the adjustment hole 5a, changes the protruding length of the leg main body 7, and inserts and fixes the pin 7 so that the pedestal 2 placed on the level adjustment block B falls forward. To prevent.
[0008]
Support rollers 8, 8 are rotatably supported on both sides of the gantry 2. The support rollers 8 and 8 are arranged so as to be slightly exposed from the upper surface of the gantry 2, and both are supported so that the turbine shaft T <b> 1 is supported and rotated around the shaft. A drive mechanism is attached to the support rollers 8. The drive mechanism includes a motor 9, a reduction gear 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 portion of the gantry 2. Similarly, the speed reducer 10 is 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 pivotally supported in the gantry 2. The drive gear 11 is connected to the speed reducer 10, and the transmission gear 12 is connected to the support rollers 8, 8. 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.
[0009]
A detachable band 15 that hangs around the turbine shaft T <b> 1 is locked at a position corresponding to the support rollers 8, 8 between both end portions of the gantry 2. The band 15 has an annular shape that is continuous with the gantry 2, is hung around the turbine shaft T <b> 1, and regulates the movement path so that the gantry 2 gradually moves around the axis from the upper side and moves downward. To do. As shown in FIG. 5, a copper plate 16 and a metal ring 17, which are protective materials for protecting the turbine shaft T <b> 1 while avoiding direct contact with the support roller 8, are hung around. 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 halved elements, and are attached with both ends abutted. The metal ring 17 is fixed with bolts by abutting the ends of the half elements.
[0010]
In this support device 1, the turbine shaft T1 that is still installed in the power plant or the like is released from the bearing, and the half element of the ring 17 is bolted to the turbine shaft T1, and the ring 17 and the turbine shaft T1 are mounted. Further, a copper plate 16 is inserted between them. Then, the support device 1 is lifted by a chain block (not shown), a band 15 is mounted around the ring 17, and the support device 1 is disposed above the turbine shaft T <b> 1. When the band 15 is attached around the ring 17, the support rollers 8 and 8 also coincide with the position of the ring 17. As shown in FIG. 6, while operating the chain block to hold the gantry 2, the chain block is rotated around the turbine axis T 1 and arranged downward. Then, the pedestal 2 is placed on the level adjustment block B previously arranged below the turbine shaft T1, the band 15 is removed, and the pedestal 2 with the turbine shaft T1 still floating is adjusted and stabilized by the auxiliary legs 4. To prevent falls. The above operation is also performed at the other end side position of the turbine shaft T1. Next, the hydraulic pumps 3b of the supporting devices 1 and 1 on both sides of the turbine shaft T1 are operated to raise the gantry 2 by the height adjusting device 3, respectively, and the turbine shaft T1 is slightly lifted from the bearing. When the turbine shaft T1 is supported by the support devices 1 and 1, the support rollers 8 and 8 are driven by the motor 9, the turbine T is rotated slowly, the surroundings are 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 of the support rollers 8 and 8. After the maintenance and inspection work is completed, the support device 1 is removed in the reverse order. That is, the stand 2 is lowered by the height adjusting device 3 of the support devices 1 and 1, and the turbine shaft T1 is placed on the bearing. After the band 15 is mounted on the ring 17 on the turbine shaft T1, the auxiliary leg 4 is reduced, and the support device 1 is held by being suspended from the level adjustment block B by a chain block or the like, and rotated around the turbine shaft T1. Lifting upward, removing the band 15, the support device 1 is placed away from the turbine shaft T1, and the ring 17 and the copper plate 16 are removed.
[0011]
【The invention's effect】
As described above, according to the present invention, it is sufficient to move the turbine slightly up and back, so that it is possible to omit the fine adjustment work of center alignment, and there is no risk of damaging the turbine. And the apparatus can be configured to be relatively small and light.
[Brief description of the drawings]
FIG. 1 is a front view of a support device according to the present invention.
FIG. 2 is a side view of the support device.
FIG. 3 is a plan view of the support device.
FIG. 4 is a configuration diagram of a hydraulic device.
FIG. 5 is an exploded view of the band in an attached state.
FIG. 6 is a front view of the support device showing a setting process of the support device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Support apparatus 2 Base 3 Height adjustment apparatus 4 Auxiliary leg 8 Support roller 9 Motor 15 Band 16 Copper plate 17 Ring T1 Turbine shaft B Level adjustment block

Claims (4)

A supporting device that supports the shaft of an existing turbine in place of a bearing, inspects and maintains the entire circumference by slowly rotating the turbine,
A height-adjustable mount placed directly or indirectly on the ground;
A pair of support rollers opposed to each other so as to cooperatively mount the turbine shaft, supported on the gantry so as to be rotatable around an axis in the same direction as the turbine shaft, and at least one of which can be rotationally driven;
Both ends of the frame are locked to each other, and a detachable band is provided for fixing the installation path of the frame by hanging around the turbine shaft and moving the frame around the shaft to dispose the frame below the turbine shaft. A support device for inspection and maintenance of a turbine, characterized in that: The turbine support device for inspection and maintenance according to claim 1, wherein a hydraulic height adjusting device is provided at a lower portion of the gantry. The supporting device for turbine inspection and maintenance according to claim 1, wherein the gantry is provided with auxiliary legs for preventing the gantry from toppling over. The turbine turbine inspection / maintenance support apparatus according to claim 1, wherein the turbine shaft is hung with a protective material for protecting the turbine shaft from contact with the support roller interposed therebetween.

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