JP2004248474A - Apparatus and method for toppling rotor over sideways - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To stably support the lower shaft portion of a rotor for damage prevention and smoothly perform toppling operation when the rotor is pulled out of the stator of a vertical rotary machine and is toppled over sideways. <P>SOLUTION: A toppling apparatus 1 comprises a shaft insertion 5 which is installed above a base portion 2 so that the shaft insertion portion can be freely rotated around its horizontal axis and wheel arrangements 6 provided under the base 2. The toppling apparatus is prepared. An upper shaft 15b of a rotor 15 is gripped and pulled out upward by a gripping portion 16 of a hoisting means, such as an overhead traveling crane. A lower shaft 15c of the rotor 15 pulled out is inserted into the shaft insertion 5 of the toppling apparatus 1, and using the wheel arrangements 6, the toppling apparatus 1 is moved sideways to topple the rotor 15 over sideways. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an apparatus for laying down a rotor pulled out of a vertical rotating machine having a large weight and size, such as a large vertical motor, for maintenance and inspection, and a method of laying down using the apparatus.
[0002]
[Prior art]
A vertical rotating device such as a large-capacity vertical pump is directly connected to a large vertical motor. A vertical rotating machine such as a vertical electric motor is composed of a stator and a rotor.When performing maintenance and inspections periodically or as needed, the rotor is pulled out of the stator and maintenance is separately performed. Is For this purpose, the rotor is first pulled out from the stator and then turned down, and the rotor is stably supported on a suitable support for inspection. On the other hand, since the stator after pulling out the rotor is in a stable state, maintenance and inspection are performed as it is.
[0003]
Therefore, when performing maintenance and inspection of the vertical rotating machine, it is important to efficiently turn the rotor pulled out from the stator to a stable state. In order to pull out the rotor from the stator, a lifting means such as an overhead crane is usually used. For example, a grip is attached to the tip of the lifting wire of the lifting means, and the upper shaft of the rotor is gripped by the grip and pulled upward. For this reason, usually, a hole penetrating in the radial direction is provided in the upper shaft portion of the rotor, and the insertion rod or the wire of the grip portion is inserted into the hole and gripped.
[0004]
Conventionally, the sideways method is carried out by first gripping and lifting the upper shaft portion of the rotor with a lifting means such as an overhead crane, and vertically lowering the lower shaft portion on a support made of a stacked body such as a square bar. The rotor is gradually inclined by performing a combined operation of lowering the lifting means while laying down and then gently laterally moving the rotor. When the rotor is laid down to a substantially horizontal state, the lower shaft located on the opposite side is supported by another support.
[0005]
[Problems to be solved by the invention]
However, the above-mentioned sideways method requires a high degree of skill, since it is necessary to perform a careful and complicated operation so that the lower shaft portion of the rotor does not move laterally on the support or falls off therefrom. Further, if an excessive horizontal component is applied to the rotor, there is a possibility that the piled up timber collapses, so that a countermeasure is required.
Therefore, an object of the present invention is to solve the problems in the conventional side-down method, and an object of the present invention is to provide a new side-down device and a side-down method using the same.
[0006]
[Means for Solving the Problems]
A side-to-side device according to the present invention for solving the above problems is an apparatus for turning over a rotor pulled out from a vertical rotating machine,
It is provided with a base, a shaft insertion part provided at the upper part of the base so as to be rotatable around its horizontal axis, and a wheel device provided at the lower part of the base (claim 1).
[0007]
Furthermore, the method of laying down to solve the above problem is a method of laying down a rotor pulled out of a stator of a vertical rotating machine,
Prepare a base, a shaft insertion part provided at the upper part of the base so as to be rotatable around its horizontal axis, and a traverse device equipped with a wheel device provided at the lower part of the base, and lift the upper shaft part of the rotor. In a state of being lifted by the means, the lower shaft portion of the rotor is inserted into the shaft insertion portion of the traversing device, and then the rotator is lowered by lifting means, and the traversing device is utilized by using the wheel device. The present invention is characterized in that the rotor is turned sideways while moving in the lateral direction (claim 2).
[0008]
In the above-mentioned side-down method, when the rotor is in the horizontal state as described above, the upper shaft portion can be supported by the support, and then the lifting means can be removed from the upper shaft portion.
Further, after the lifting means is removed from the upper shaft portion, the lower shaft portion can be transferred from the shaft insertion portion of the traversing device to another support to be supported (claim 4).
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front view of a laying device according to the present invention, FIG. 2 is a right side view of FIG. 1, and FIG. 3 is a plan view of FIG. In these figures, a side-down device 1 includes a base 2 assembled by welding L-shaped steel, I-shaped steel, and the like, a pair of support members 3 extending upward from the base 2, and a pair of bearings provided on the support members 3. The bearing 4 includes a shaft insertion portion 5 that supports a shaft 9 around each horizontal axis of each bearing portion 4, and wheel devices 6 provided at four lower corners of the base 2.
[0010]
The shaft insertion portion 5 has a cylindrical body 7 and a pair of shafts 9 extending leftward and rightward from the cylindrical body 7 so that the lower shaft of the rotor is inserted through the upper opening of the cylindrical body 7. Has become.
Each wheel device 6 includes a bearing 10 fixed to the base 2 and a plurality of wheels 11.
A plurality of bearings are arranged in parallel in the bearing unit 10, and a wheel 11 is supported on each bearing so that its axis is parallel to the axis of the shaft insertion unit. The rotation of each wheel 11 allows the base 2 to move only in the left-right direction in FIG.
[0011]
At the upper four corners of the base 2, lifting hooks 12 as shown are provided as required, and these lifting hooks 12 are used when the horizontal device 1 is lifted by a lifting means such as a crane and transported. You.
[0012]
4 to 8 are schematic diagrams for explaining a method of laying down the rotor. The method of laying down the rotor will be described with reference to these drawings. As shown in FIG. 4, the vertical rotary machine 13 includes a stator 14 and a rotor 15. The rotor 15 has a cylindrical main body 15a, an upper shaft 15b extending upward from the main body 15a, and a lower part extending from the main body 15a. The lower shaft portion 15c (see FIG. 5) extends to the upper shaft portion 15b, and a hole penetrating in the radial direction is provided in the upper shaft portion 15b.
[0013]
In order to pull the rotor 15 upward from the stator 14, first, the rotor 15 is lifted from the stator 14 by the gripping portion 16 of the lifting means (not shown) with the upper bearing (not shown) of the stator removed. And lift it up. The grip portion 16 of the present embodiment has a frame-shaped locking portion 16a for locking a wire 17 extending from the lifting means and a locking bolt 16b, and a through hole provided with the locking bolt 16b in the locking portion 16a. And a hole provided in the upper shaft portion 15b of the rotor 15, and a nut 16c is screwed into the hole so that the locking bolt 16b does not come off.
[0014]
Next, the rotor 15 is pulled upward from the stator 14. Then, the laying device 1 according to the present invention shown in FIGS. 1 to 3 is disposed immediately below the rotor 15 lifted as shown in FIG. 5, and then the rotor 15 is gradually lowered by operating the lifting means. Then, the lower shaft portion 15c of the rotor 15 is inserted into the cylindrical body 7 of the shaft insertion portion 5 in the laterally tilting device 1, and the lowering operation of the lifting means is temporarily stopped.
[0015]
Next, the hand-held device 1 is slightly pushed in the lateral direction, and the lowering operation of the rotor 15 is resumed by the lifting means. Start self-propelled in the direction. When the laterally tilting device 1 starts self-running, the rotor 15 gradually tilts as shown in FIG. 6, but the lowering operation of the rotor 15 by the lifting means is further continued until its axial direction becomes nearly horizontal.
[0016]
When the axial direction of the rotor 15 approaches horizontal, a support 18 as shown in FIG. 7 is arranged on the floor located below the upper shaft 15b, and the upper support 15 supports the upper shaft 15b. . FIG. 7 shows a state in which the upper shaft 15b is supported by the support 18. The support 18 has a bottom 18a and a leg 18b extending upward from the bottom 18a. A V-shaped support groove (not shown) is formed at the top of the leg 18b, and the upper shaft 15b is formed in the support groove. Is stably supported.
[0017]
By supporting the upper shaft portion 15b of the rotor 15 on the support body 18 and supporting the lower shaft portion 15c on the shaft insertion portion 5 of the horizontal device 1 as shown in FIG. , That is, it is stably supported in a state where it is lying down. Therefore, the maintenance and inspection work of the rotor 15 can be sufficiently performed even in the state of FIG.
[0018]
However, as shown in FIG. 8, the lower shaft portion 15c of the rotor 15 may be supported by a support 18 similar to that shown in FIG. In that case, first, the lowering unit 1 is detached from the lower shaft unit 15c while the lower shaft unit 15c is lifted by a jack device or a lifting device, and then the lower shaft unit 15c is separated by another support 18. To support. That is, the operation of transferring the support of the lower shaft portion 15c from the shaft insertion portion 5 of the laterally tilting device 1 to the support 18 is performed. This makes it possible to perform maintenance and inspection while the rotor 15 is more stably and reliably supported.
[0019]
When the maintenance and inspection of the rotor 15 is completed, the rotor 15 is suspended and mounted on the stator 14 again. In this case, the state shown in FIG. 7 is first set, the lifting means is operated in the reverse order from the state shown in FIG. 4 to the state shown in FIG. 4, and finally the rotor 15 may be mounted in the stator 14. Therefore, the laterally falling device 1 according to the present invention can also be suitably used when the rotor 15 is started up in the vertical direction from the laterally lying state.
[0020]
【The invention's effect】
As described above, the device for laying down the rotor in the vertical rotating machine according to the present invention includes a shaft insertion portion provided on the upper portion of the base so as to be rotatable around the horizontal axis, and a wheel device provided on the lower portion of the base. It is characterized by having. When the rotor is turned over using the present device, the wheel device can smoothly perform the turning operation while the lower shaft portion of the rotor is stably supported by the shaft insertion portion. Therefore, there is no possibility that the lower shaft portion slides down or rubs during the side-down work, so that an accident in which the lower shaft portion is damaged can be prevented. In addition, no skill is required for the operation, and the rotor can be slid over efficiently, quickly and safely.
[0021]
In addition, the method for horizontally turning a rotor of a vertical rotating machine according to the present invention includes a base, a shaft insertion portion rotatably provided on an upper portion of the base, and a wheel overturn device having a wheel device provided on a lower portion of the base. In the state where the upper shaft portion of the rotor is suspended by the lifting means, the lower shaft portion of the rotor is inserted into the shaft insertion portion of the horizontal device, and then the rotor is lowered by the lifting means. The present invention is characterized in that the rotor is laid down while the traversing apparatus is moved in the lateral direction using the wheel device.
According to this method, since there is no possibility that the lower shaft portion slides down or rubs during the side-down work, an accident in which the lower shaft portion is damaged can be prevented. In addition, the operation does not require skill, and the rotor can be efficiently and quickly and safely laid down.
[0022]
In the above method, when the rotor is in a horizontal state, its upper shaft can be supported by the support, and then the lifting means can be removed from the upper shaft. According to this method, maintenance and inspection can be performed while the rotor is more stably supported.
[0023]
Further, when the lower shaft portion of the rotor is supported by the support as described above, after removing the lifting means from the upper shaft portion, the lower shaft portion is moved from the shaft insertion portion of the horizontal device to another support. It can be transferred and supported. According to this method, maintenance and inspection can be performed with the rotor more stably and reliably supported.
[Brief description of the drawings]
FIG. 1 is a front view of a horizontal device according to the present invention.
FIG. 2 is a right side view of FIG.
FIG. 3 is a plan view of FIG. 1;
FIG. 4 is a schematic view for explaining a method of laying down the rotor.
FIG. 5 is a schematic diagram for explaining a method of laying down the rotor.
FIG. 6 is a schematic diagram for explaining a method of laying down the rotor.
FIG. 7 is a schematic diagram for explaining a method of laying down the rotor.
FIG. 8 is a schematic diagram for explaining a method of laying down the rotor.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Side-turning device 2 Base 3 Support member 4 Bearing part 5 Shaft insertion part 6 Wheel device 7 Cylindrical body 9 Shaft 10 Bearing 11 Wheel 12 Hook 13 Vertical rotary machine 14 Stator 15 Rotor 15a Main body 15b Upper shaft part 15c Lower side Shaft portion 16 Gripping portion 16a Locking portion 16b Hanging bolt 16c Nut 17 Wire 18 Support 18a Bottom portion 18b Leg

Claims (4)

A device for laying down a rotor 15 pulled out from a stator 14 of a vertical rotating machine 13,
A rotor, comprising: a base portion (2); a shaft insertion portion (5) provided on the upper portion of the base portion (2) so as to be rotatable around a horizontal axis thereof; and a wheel device (6) provided on a lower portion of the base portion (2). Falling device. In a method in which the rotor 15 pulled out from the stator 14 of the vertical rotating machine 13 is turned over,
A traverse device 1 having a base 2, a shaft insertion part 5 provided at the upper part of the base 2 so as to be rotatable around its horizontal axis, and a wheel device 6 provided at a lower part of the base 2 is prepared. In a state where the upper shaft portion 15b is lifted by the lifting means, the lower shaft portion 15c of the rotor 15 is inserted into the shaft insertion portion 5 of the laterally tilting device 1, and then the rotor 15 is lowered by the lifting means. A method of laying down the rotor, wherein the rotator 15 is laid down while the traversing device 1 is moved in the lateral direction using the wheel device 6. The rotor according to claim 2, wherein when the rotor (15) is in a horizontal state, the upper shaft (15b) is supported by a support (18), and then lifting means is removed from the upper shaft (15b). Method. 4. The rotation according to claim 3, wherein, after the lifting means is removed from the upper shaft portion 15b, the lower shaft portion 15c is transferred from the shaft insertion portion 5 of the traversing device 1 to another support 18 and supported. How to fall child.

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