JP2016144317A - Rotary electric machine disassembly method and rotary electric machine disassembly apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To securely separate a rotor from a stator without delicate adjustment, at the time of inspecting a rotary electric machine.SOLUTION: A rotary electric machine disassembly method includes: a mounting step of mounting a rotary electric machine on a movement stand and supporting a rotor shaft by using a coupling side rotor support stand; an extension shaft attachment step of attaching an extension shaft to the rotor shaft; an extension shaft supporting step of supporting the extension shaft by using a counter coupling side rotor supporting stand; a counter coupling side bearing bracket removal movement step of removing and moving a counter coupling side bearing bracket; a coupling side bearing bracket removal step of removing a coupling side bearing bracket; and a movement step of moving the movement stand until a rotor and a rotor core have been separated in the main shaft direction.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a disassembling method and a disassembling apparatus for a rotating electrical machine having a horizontal axis.

  The rotating electrical machine includes a rotor and a stator. The rotor usually has a rotor shaft that rotates about its axis and a rotor core that is provided on the outer side in the radial direction of the rotor shaft. In the case of a synchronous machine or a wound-type induction machine, a rotor coil is provided near the radial surface of the rotor core. The stator has a cylindrical stator core in which ferromagnetic steel plates are laminated in the axial direction, and a stator coil wound around a tooth portion formed on the stator core.

  In a rotating electrical machine, an electric potential difference is generated between these coils and surrounding structures, and therefore there is an insulating portion for ensuring an insulating function. For this reason, it is important to maintain the soundness of the insulating portion. Moreover, in order to maintain the relative position between the components of the rotating electrical machine, there is a fixed portion such as a wedge. Since these insulating parts and fixed parts deteriorate over time, internal inspections must be carried out regularly.

JP-A-5-115155 JP-A-8-223850

  In the overhaul of the rotating electrical machine, in order to check the rotor and the stator, it is necessary to pull the rotor out of the stator. For this purpose, for example, in a rotating electrical machine having an external bearing base, an intermediate base is provided at the lower part of the external bearing base, the rotor can be moved, and both ends of the rotor shaft are suspended from above while rotating horizontally. A method of pulling out the child in the axial direction is known (see Patent Document 1). In this method, when the rotor is pulled out in the axial direction in a state where the rotor is suspended from above, it is necessary to carry out with fine adjustment in order to maintain the horizontal state of the rotor.

  In addition, there is a technology in which a removable intermediate seat is provided between the lower part of the bearing bracket and the stator frame bearing bracket support, and the intermediate seat is removed during maintenance and inspection so that the lower part of the bearing bracket can be rotated in the circumferential direction and removed. As known (see Patent Document 2), this is based on a method of pulling out the rotor from the stator in the axial direction.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to make it possible to reliably separate a rotor and a stator without requiring fine adjustment when checking a rotating electrical machine.

  In order to achieve the above-described object, the present invention provides a rotor having a horizontal rotor shaft, a rotor core provided radially outside the rotor shaft, and a cylindrical shape disposed radially outside the rotor. A method of disassembling a rotating electrical machine having a stator and a frame provided outside the stator and rotatably supporting the rotor and fixing and supporting the stator, wherein the rotating electrical machine is placed on a moving table A mounting step of mounting and supporting the rotor shaft by a coupling side rotor support; an extension shaft attaching step of attaching an extension shaft to an end of the rotor shaft on the side opposite to the coupling side after the mounting step; After the shaft mounting step, an extension shaft support step for supporting the extension shaft on the anti-coupling-side rotor support, and the extension shaft support After the step, remove the anti-coupling side bearing bracket and move the anti-coupling side bearing bracket to the anti-coupling side rotor support side, and the coupling side bearing bracket to remove the coupling side bearing bracket. After the removal step, the anti-coupling-side bearing bracket removal moving step, and the coupling-side bearing bracket removal step, the moving table on which the frame containing the stator is mounted is mounted on the stator and the rotor core. And a moving step of moving to the side opposite to the coupling side rotor support until it is separated in the main axis direction.

  The present invention also provides a rotor having a horizontal rotor shaft, a rotor core provided on the radially outer side of the rotor shaft, a cylindrical stator disposed on the radially outer side of the rotor, and the stator. A rotating electrical machine disassembling apparatus for disassembling a rotating electrical machine having a frame rotatably provided to support the rotor and fixedly supporting the stator, wherein the rotor shaft portion near the coupling side bearing A coupling-side rotor support that supports a part of the weight of the rotor independently of the frame; and an extension shaft that can be coupled to an end portion on the opposite side of the rotor shaft and extends coaxially in the extension direction. An anti-cup that supports a part of the weight of the rotor independently of the frame together with the coupling-side shaft rotor support at the rotor shaft near the coupling-side bearing A ring-side rotor support base, characterized in that it comprises a movable table movable in a counter-coupling side rotor support base side in the axial direction while mounted frame accommodating the stator.

  According to the present invention, the rotor and the stator can be reliably separated without requiring fine adjustment when inspecting the rotating electrical machine.

It is a flowchart which shows the procedure of the decomposition | disassembly method of the rotary electric machine which concerns on embodiment. It is an elevational sectional view showing a preparation state for making the rotating electrical machine main body movable in the disassembling method of the rotating electrical machine according to the embodiment. It is an elevation sectional view showing the state where the rotating electrical machine main body is mounted on the rotating electrical machine disassembling apparatus in the rotating electrical machine disassembling method according to the embodiment. It is an elevation sectional view showing the state where the extension shaft was attached and the like in the disassembling method of the rotating electrical machine according to the embodiment. It is an elevational sectional view showing a state where the coupling of the anti-coupling side bearing bracket is removed in the disassembling method of the rotating electrical machine according to the embodiment. It is an elevation sectional view showing the state where the anti-coupling side bearing bracket was moved etc. in the disassembling method of the rotating electrical machine according to the embodiment. It is an elevation sectional view showing the state where the coupling side bearing bracket was removed in the disassembling method of the rotating electrical machine according to the embodiment. It is an elevation sectional view showing the state where the frame which incorporates the stator was moved in the disassembling method of the rotating electrical machine according to the embodiment. It is an elevation sectional view showing the state where the rotor was pulled out in the conventional method for disassembling a rotating electrical machine.

  Hereinafter, a rotating electrical machine disassembling method and a rotating electrical machine disassembling apparatus according to an embodiment of the present invention will be described with reference to the drawings. Here, the same or similar parts in each drawing are denoted by the same reference numerals, and redundant description is omitted.

  FIG. 1 is a flowchart illustrating a procedure of a method for disassembling a rotating electrical machine according to the embodiment. Hereinafter, each step in the flowchart of FIG. 1 will be described with reference to FIGS.

  FIG. 2 is an elevational sectional view showing a preparation state for making the rotating electrical machine main body movable. First, preparation for movement of the rotating electrical machine main body 110 is performed at the installation location of the rotating electrical machine 100 (step S01). Here, the rotating electrical machine 100 includes the rotor 10, the stator 20, and the cooling device 41. The rotor 10 has a rotor shaft 11 and a rotor core 12. The stator 20 has a stator core 21 and a stator coil 22. The rotor core 12 and the stator 20 are housed in a frame 30.

  The rotor shaft 11 is rotatably supported by a coupling side bearing 31 and an anti-coupling side bearing 33. The coupling side bearing 31 is supported by a coupling side bearing bracket 32 that is fixedly fixed to the frame 30. Further, the anti-coupling side bearing 33 is supported by an anti-coupling side bearing bracket 34 that is fixedly fixed to the frame 30.

  As preparation for movement, for example, removal of the coupling tightening bolt 13a of the coupling portion 13, removal of the resolver 15 for rotation detection, removal of the installation bolt 14 and the like are performed. Moreover, the cooling device 41 is removed.

  Here, the part having the rotor 10, the stator 20, the frame 30, the coupling side bearing 31, and the anti-coupling side bearing 33 remaining after removing the peripheral part is called the rotating electrical machine main body 110.

  FIG. 3 is a vertical sectional view showing a state in which the rotating electrical machine main body is mounted on the rotating electrical machine disassembling apparatus in the rotating electrical machine disassembling method according to the embodiment. After step S01, the rotating electrical machine main body 110 is moved onto the moving table 61 of the rotating electrical machine disassembling apparatus 200. After the movement, the installation state of the rotating electrical machine main body 110 is adjusted (step S02).

  Here, the rotating electrical machine disassembling apparatus 200 includes a coupling side rotor support base 51, an anti-coupling side rotor support base 52, a pulling section 53 having an operation section 53b, a moving base 61, a moving rail 62, and an inspection base 63. Have

  The coupling side rotor support base 51 and the anti-coupling side rotor support base 52 receive loads due to their own weights such as the rotor 10, the coupling side bearing 31 attached to the rotor 10, and the anti-coupling side bearing 33. To support. The moving table 61 initially supports the load due to its own weight of the rotating electrical machine main body 110, and thereafter supports the load due to its own weight such as the stator 20 and the frame 30. The moving table 61 moves on the moving rail 62. The moving rail 62 is laid on the inspection table 63.

  In this step S02, for example, the vertical adjustment of the coupling side rotor support base 51 is performed so that the rotor shaft 11 is supported by the coupling side rotor support base 51.

  FIG. 4 is an elevational sectional view showing a state in which the extension shaft is attached and the like in the disassembling method of the rotating electrical machine according to the embodiment. After step S02, the extension shaft 75 is connected to the non-coupling side of the rotor shaft 11. Here, the anti-coupling side of the rotor shaft 11 and the extension shaft are formed to be connectable. After connecting the extension shaft 75, a wire 80 of a lifting machine (not shown) is hung on the extension shaft 75 to support the extension shaft 75 from above (step S03).

  In this state, the height of the anti-coupling side rotor support base 52 is adjusted, and the load of the rotor 10 is transferred from the wire to the anti-coupling side rotor support base 52. That is, the anti-coupling side rotor support base 52 supports the extension shaft 75 from below (step S04).

  FIG. 5 is an elevational sectional view showing a state where the coupling of the anti-coupling side bearing bracket is removed in the disassembling method of the rotating electrical machine according to the embodiment. After step S03, the anti-coupling side bearing bracket 34 is removed (step S05). As a result, the own weight of the anti-coupling side bearing 31 supported by the anti-coupling side bearing bracket 34 is applied to the rotor shaft 11. At this time, the anti-coupling side rotor support base 52 is also adjusted with respect to the change in the deflection of the rotor shaft 11. Thereafter, the wire 80 of the lifting machine is removed.

  FIG. 6 is an elevational sectional view showing a state where the anti-coupling side bearing bracket is moved in the disassembling method of the rotating electrical machine according to the embodiment. After step S05, the anti-coupling side bearing bracket 34 removed in step S05 is moved to the vicinity of the end of the extension shaft 75 (step S06).

  FIG. 7 is an elevational cross-sectional view illustrating a state where the anti-coupling side bearing bracket is removed and the like in the disassembling method of the rotating electrical machine according to the embodiment. Since the anti-coupling side bearing bracket 34 has been removed in step S05, the press board 71 is inserted into the gap between the rotor 10 and the stator 20, specifically, the gap between the rotor core 12 and the stator core 21. Further, the coupling side bearing bracket 32 is removed (step S07). Further, a wire to be pulled by the pulling unit 53 is coupled to the moving table 61 (step S08).

  FIG. 8 is an elevational cross-sectional view showing a state in which the frame incorporating the stator is moved in the disassembling method of the rotating electrical machine according to the embodiment. In step S08, the wire coupled to the moving table 61 is pulled by the pulling unit 53, and the moving table on which the frame for storing the stator is mounted is moved (step S09). Towing may be performed by manually operating the operation portion 53b, or may be performed electrically or hydraulically. As a result, the stator 20 accommodated in the frame 30 is completely separated from the radially outer position of the rotor core 12, and the rotor 10 and the stator 20 can be accessed separately.

  After step S09, as shown in FIG. 1, inspection is carried out for either the rotor 10 and the stator 20, or both the rotor 10 and the stator 20, or a range including others (step S10). .

  After performing the inspection in step S10, recovery after the inspection is performed (step S11). For restoration, the procedure from step S01 to step S09 is reversed, but the height adjustment of the coupling side rotor support base 51 and the anti-coupling side rotor support base 52 has already been carried out, so adjustment is not necessary. is there.

  FIG. 9 is an elevational sectional view showing a state in which the rotor is pulled out in the conventional method for disassembling a rotating electrical machine. This method is similar to the present embodiment in that the extension shaft is connected to the rotor, but the rotor is supported by a wire from above.

  Therefore, as a precaution, the wire may need to be hung not only at both ends but also near the anti-coupling side bearing. Or in this embodiment, although it mounts on the stable coupling side rotor support stand 51 and the anti-coupling side rotor support stand 52, since it is based on a wire in a prior art example, the position of a wire and extension shaft It is necessary to ensure a sufficient distance from the end. As a result, the required axial space L2 may be longer than the required axial space L1 (FIG. 8) in the present embodiment.

  In the present embodiment, the frame 30 containing the stator 20 and the rotor 10 can be separated only by moving the movable table 61 in the axial direction. On the other hand, in the conventional example, it is necessary to move the rotor in the axial direction while keeping the rotor always horizontal. Further, during this time, it is necessary to remove and attach the wire, and the burden on the operator is increased in order to ensure work quality.

  As described above, according to the present embodiment, the rotor and the stator can be reliably separated without requiring a fine adjustment when the rotating electrical machine is inspected.

[Other Embodiments]
As mentioned above, although embodiment of this invention was described, embodiment is shown as an example and is not intending limiting the range of invention. The embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. The embodiments and the modifications thereof are included in the scope of the invention and the scope of the invention, and are also included in the invention described in the claims and the equivalents thereof.

  DESCRIPTION OF SYMBOLS 10 ... Rotor, 11 ... Rotor shaft, 12 ... Rotor core, 13 ... Coupling part, 13a ... Coupling clamping bolt, 13 ... Coupling part, 14 ... Installation bolt, 15 ... Resolver, 20 ... Stator, DESCRIPTION OF SYMBOLS 21 ... Stator iron core, 22 ... Stator coil, 30 ... Frame, 31 ... Coupling side bearing, 32 ... Coupling side bearing bracket, 33 ... Anti coupling side bearing, 34 ... Anti coupling side bearing bracket, 35 ... Foundation bolt, 41 ... Cooling device, 51 ... Coupling side rotor support, 52 ... Anti-coupling side rotor support, 53 ... Traction part, 53b ... Operation part, 61 ... Moving table, 62 ... Moving rail, 63 ... inspection table, 71 ... breath board, 75, 76 ... extension shaft, 80 ... lifting machine wire, 100 ... rotating electric machine, 110 ... rotating electric machine main body, 200 ... rotating electric machine Solution devices

Claims (3)

A rotor having a horizontal rotor shaft, a rotor core provided radially outside the rotor shaft, a cylindrical stator disposed radially outside the rotor, and provided outside the stator; A method of disassembling a rotating electrical machine having a frame that rotatably supports the rotor and supports the stator.
A mounting step of mounting the rotating electrical machine on a moving table and supporting the rotor shaft by a coupling-side rotor support;
After the mounting step, an extension shaft attaching step for attaching an extension shaft to the end portion on the anti-coupling side of the rotor shaft;
An extension shaft support step for supporting the extension shaft on the anti-coupling side rotor support after the extension shaft mounting step;
After the extension shaft support step, the anti-coupling side bearing bracket removal moving step of removing the anti-coupling side bearing bracket and moving to the anti-coupling side rotor support base side;
A coupling side bearing bracket removing step for removing the coupling side bearing bracket;
After the anti-coupling-side bearing bracket removal moving step and the coupling-side bearing bracket removal step, the moving base on which the frame incorporating the stator is mounted is configured such that the stator and the rotor core are the main shaft. A moving table moving step that moves to the anti-coupling side rotor support table side until it is separated in the direction;
A method of disassembling a rotating electrical machine, comprising: A rotor having a horizontal rotor shaft, a rotor core provided radially outside the rotor shaft, a cylindrical stator disposed radially outside the rotor, and provided outside the stator; A rotating electrical machine disassembling apparatus for disassembling a rotating electrical machine having a frame that rotatably supports the rotor and that supports the stator.
A coupling-side rotor support that supports a part of the weight of the rotor independently of the frame at the rotor shaft near the coupling-side bearing;
An extension shaft that can be coupled to the opposite end of the rotor shaft and extends coaxially in the extension direction;
An anti-coupling-side rotor support that supports a part of its own weight independently of the frame together with the coupling-side shaft rotor support in the rotor shaft portion in the vicinity of the coupling-side bearing;
A movable table that can move to the side opposite to the rotor-supporting side in the axial direction while mounting the frame containing the stator;
A rotary electric machine disassembling apparatus comprising:   The extension shaft moves from the position where the coupling side end of the frame on the moving base overlaps the anti-coupling side end of the rotor core to the anti-coupling side rotor support base side. The rotary electric machine disassembling apparatus according to claim 2, wherein the rotating electric machine disassembling apparatus has a sufficient length.

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