JP2011229236A - Rotor insertion device and method for rotating electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotor insertion device which doesn't require work for receiving a rotor again and is capable of reducing an amount of device shaft deflection.SOLUTION: The rotor insertion device includes: a stator frame mounting base 4 on which a stator frame of a rotating electric machine is mounted; a fixed support base 9 which is coaxial with an axis of the stator frame mounted on the mounting base, can be moved in an axial direction, and has, in an end nearer to the stator frame mounting base, a shaft having a tapered recess formed thereon; a movable support base 15 which is coaxial with the axis of the stator frame mounted on the mounting base and has, in an end nearer to the stator frame mounting base, a shaft having a tapered recess formed thereon; and rotor support rollers 23 and 24 which support the rotor to be inserted to the stator frame, movably in the axial direction. A rotor shaft having tapered projections formed in both ends thereof is held between the tapered recess formed on the shaft on the fixed support base side and the tapered recess formed on the shaft on the movable support base side, to insert the rotor to the stator frame.

Description

  The present invention relates to a rotor insertion technique for a rotating electric machine, and more particularly to an insertion technique for inserting a rotor into a stator of a rotating electric machine when the rotating electric machine is assembled.

  For example, in Patent Document 1, centering shafts having the same diameter as the rotor are attached to both ends of the rotor, and the centering with the stator is performed using the centering shaft, and the rotor is centered. A rotor insertion device is shown in which a movable carriage is moved in the axial direction and a stator is inserted into a rotor through a minimal gap.

  In this device, as the insertion work progresses, the length of the roller that supports the centering shaft and the protruding length of the shaft from the metal support position is shortened, so that the amount of deflection during high-precision positioning near the end of the insertion work is suppressed. Is possible. In addition, because the rotor can be mounted at a position where the shaft on one side is elongated and the stator frame is penetrated, the rotor mounting operation before starting the insertion operation is only to place both ends of the rotor on both shafts. That's okay.

Japanese Patent Laid-Open No. 8-126262

  In assembly work of a rotating electrical machine, after inserting the rotor, a bearing and a bearing flange are generally assembled to journal portions at both ends of the rotor. However, in the apparatus according to Patent Document 1, the shaft is thick in order to increase rigidity. For this reason, the shaft becomes an obstacle during the assembly of the bearing and the bearing flange. For this reason, after inserting the rotor, once the rotor is lowered into the stator frame, the shafts on both sides are retracted, bearings and bearing flanges are mounted on both sides of the rotor, and the rotor ends are again connected to another means. The work of re-supporting, so-called receiving work, occurs.

  During this re-receiving operation, the rotor and the rotor frame may collide and cause damage. When a magnetized rotor is handled, the magnetic attraction force works due to the magnetization, which increases the possibility.

In Patent Document 1, in order to further reduce the amount of deflection of the apparatus support shaft, rollers and metal are attached to both ends of the stator frame to guide and support the shaft. With this structure, it is difficult to ensure parallelism between the guide core of the apparatus support shaft and the guide core of the moving table.

  In addition, since the span between the two guides is narrow after the insertion operation is started, if there is a guide position deviation, the position deviation of the shaft tip portion (rotor end support portion) becomes excessive. The offset load between the two guides is also excessive.

  In addition, when the shaft passes through the stator frame, the shaft is supported by the roller, but immediately after the shaft tip enters the stator frame, the means for supporting the shaft or the stator is lost for a moment. For this reason, the deflection increases for a period of time.

  In addition to the guide, it is necessary to define the mounting positions of the rotor and the rotor frame with high accuracy and keep them concentric. If there is a deviation, the insertion operation becomes impossible or the product is damaged. Further, the rotor frame is moved by a moving table, but the rotor frame is a large and heavy part among the rotating electrical machine components, and is not an advantageous structure for high-accuracy positioning. The present invention has been made in view of these problems, and provides an insertion device that does not require a rotor receiving operation and that can suppress the amount of device shaft deflection.

  In order to solve the above problems, the present invention employs the following means.

  A stator frame mounting base for mounting the stator frame of the rotating electrical machine, and an axial center of the stator frame mounted on the mounting base and movable in the axial direction. A fixed support base provided with a shaft having a tapered recess formed in a part thereof, a concentric core axis of a stator frame mounted on the mounting base, and a tapered shape at an end of the stator frame mounting base side A movable support base having a shaft with a recess formed therein and a rotor support roller for supporting the rotor inserted into the stator frame so as to be movable in the axial direction are formed on the shaft on the fixed support base side. Between the tapered recess and the tapered recess formed on the shaft on the movable support base side, a rotor shaft having tapered projections formed at both ends is sandwiched and the rotor is inserted into the stator frame.

  Since the present invention has the above-described configuration, it is possible to provide an insertion device that does not require a rotor reworking operation and that can suppress the amount of device shaft deflection.

It is a figure explaining the rotary electric machine rotor insertion apparatus concerning embodiment of this invention. It is a figure which shows the state which moved the movable support base to the position which a taper ring touches a taper collar. It is a figure which shows the state which moved the movable support base to the position of the limit which a rotor core part can mount in a roller. It is a figure which shows the completion state of an insertion operation | work.

  Hereinafter, embodiments will be described with reference to the accompanying drawings. FIG. 1 is a diagram illustrating a rotating electrical machine rotor insertion device according to an embodiment of the present invention.

  In FIG. 1, reference numeral 1 denotes a stator frame, which is mounted on a stator mounting base 4 provided on the apparatus base 3 with a bearing flange 2 attached to the left side of the stator frame 1. Reference numeral 5 denotes a rotor. A bearing 6 is attached to the left side of the rotor 5 in advance, and a bearing 7 and a bearing flange 8 are attached to the right side. Further, taper rings 21 and 22 whose outer diameter sides are tapered are fitted to both shaft ends, and the insertion operation is performed in this state.

  A fixed support base 9 holds the shaft 11 via the slide guide 10. The shaft 11 can be moved by expansion and contraction of the cylinder 12, and the outer diameter thereof is smaller than the diameter of the center hole of the bearing flange 2 or the outer diameter of the portion of the bearing 6 that fits the bearing flange 2. Further, a hole is formed at the rotor support side tip of the shaft 11. A taper collar 13 having a tapered shape on the inner peripheral side and a smaller diameter on the outer peripheral side than the diameter of the tip end hole of the shaft 11 is inserted into the hole. The position of the taper collar 13 can be adjusted by adjusting screws 14 provided in the horizontal and vertical directions of the shaft 11. The taper portion of the taper collar 13 is set to a shape that matches the taper portion of the taper ring 21 provided at the rotor shaft end.

  Reference numeral 15 denotes a movable support base, which can be moved on a rail 16 by a thrust screw 17 that is rotated by a motor 18. A shaft 19 is provided on the upper part of the movable support base 15, and a hole is formed at the tip of the rotor support side. A tapered collar 20 having a tapered shape on the inner peripheral side and a smaller diameter on the outer peripheral side than the diameter of the tip end of the shaft 19 is inserted into the hole. The position of the taper collar 20 can be adjusted by adjusting screws 33 provided in the horizontal and vertical directions of the shaft 19. The taper portion of the taper collar 20 is set to a shape that matches the taper portion of the taper ring 22 provided at the rotor shaft end.

  Further, the stator frames 1, the rotor 5, the shaft 11, and the shaft 19 have such a positional relationship that the axes of the stator frame 1, the rotor 5, the shaft 11, and the shaft 19 coincide. Of course, the axis of the rail 16, the thrust screw 17, and the motor 18 are also set parallel to the axis.

  Reference numerals 23 and 24 denote rollers for supporting the lower side surface of the rotor 5, which can swing around the pins 29 and 30 via the links 25 and 26 by expanding and contracting the cylinders 27 and 28, respectively. The base 3 can be retracted. Further, the position of the roller is set to a position in contact with the lower side surface of the rotor 5 when the axis of the rotor 5 is aligned with the stator frame axis.

  Next, an operation for inserting the rotor into the stator will be described with reference to FIGS. Here, FIG. 1 is a diagram showing an initial state, FIG. 2 is a diagram showing a state in which the movable support base 15 is moved to a position where the taper ring 21 is in contact with the taper collar 13, and FIG. 3 is a diagram showing the movable support base 15 in the rotor. FIG. 4 is a diagram showing a state in which the core portion is moved to a position that can be mounted on the roller 23, and FIG. 4 is a diagram showing a completed state of the insertion work.

  First, the cylinder 11 having one end fixed to the fixed support base 9 is extended to move the shaft 11 to the left. Further, the movable support base 15 is moved to the right and retracted. The rollers 23 and 24 are projected upward. Next, the stator frame 1 to which the bearing flange 2 is attached is mounted on the stator mounting base 4, and then the cylinder 11 is contracted to extend the shaft 11 to the right. In this state, by using the outer diameter of the shaft 11 and the inner diameter of the stator frame 1, the core position of the stator frame 1 is finely adjusted so as to match the core of the shaft 11.

Next, the rotor 5, to which the bearing 6, the bearing 7, the bearing flange 8, and the taper rings 21 and 22 are attached, is transported by a crane and suspended to a position in contact with the roller 24, and then the movable support base 15 is moved to the left. By doing so, the taper collar 20 and the taper ring 22 are fitted together. In this state, the weight of the rotor 5 is supported by the roller 24 and the moving support base 15. Since the fitting is performed through the tapered portions of the tapered collar 20 and the tapered ring 22, rough positioning by a crane is sufficient for positioning the stator 5. Thereafter, the wires 31 and 32 suspending the stator 5 are removed, and the crane is retracted (FIG. 1).

  Next, the movable support base 15 is moved further leftward to a position where the taper ring 21 contacts the taper collar 13.

  At this time, the fitting between the taper ring 21 and the taper collar 13 is performed inside the stator frame 1 and is difficult to see, but this fitting is performed by the taper portion of the taper collar 13 and the taper ring 21. Therefore, the axis of the slide guide 10 and the axis of the stator 5 are automatically aligned. Thus, by adopting the taper collar 13 and the taper ring 21 for fitting, it is possible to prevent deterioration in workability due to deterioration in visibility. Further, it is possible to prevent the apparatus from becoming large and reduce the accuracy required for the thrust guide portion and the like.

  The distance between the roller 23 and the roller 24 in the rotor axial direction is set to be smaller than the length L of the core portion of the stator. For this reason, it is devised so that the weight of the rotor 5 can always be supported by any one of the rollers. Further, since the taper collar 20 and the taper ring 22 are fitted through the taper portion, the more the thrust from the movable support base 15 is applied, the more the alignment is performed (FIG. 2).

  Thereafter, the roller 24 is retracted downward, and the movable support base 15 is moved to the left to the position where the core portion of the rotor 5 is mounted on the roller 23. At this time, the cylinder 12 continues to produce thrust in the direction of shortening, but the cylinder 12 thrust is set to be smaller than the moving support base 15 thrust. It is also possible to push back while generating a constant thrust by the action of a relief valve of a pneumatic circuit (not shown).

  In addition, since most of the weight of the rotor 5 is supported by the roller 23 and the moving support base 13, the weight added to the shaft 11 is very small.

  Thereafter, the weight of the rotor 5 is added to the shaft 11 by retracting the roller 23 downward. However, in this state, since the cantilever protruding length of the shaft 11 is considerably small, the positional deviation due to the deflection of the shaft 11 is very small (FIG. 3).

  Next, the movable support base 15 is further moved leftward so that the folder portion of the bearing 6 is fitted to the bearing flange 2 and the bearing flange 8 of the bearing 7 is fitted to the stator frame 1. As a result, the rotor can be attached to the stator without performing a so-called receiving operation of re-supporting both ends of the rotor by another means.

  Since the fitting gap between the bearing 6 and the bearing flange 2 and the fitting gap between the bearing flange 8 and the stator frame 1 are extremely small, the position of the adjusting screw 14 for adjusting the position of the taper collar 13 and the position of the taper collar 20. The final fitting operation is carried out while adjusting the adjusting screw 33 for adjusting. Thus, the rotor insertion operation can be completed without applying an offset load to the shaft 11, the slide guide 10, the stator frame 1, and the rotor 5. Even if the mounting position of the stator frame 1 is deviated, the insertion position can be corrected.

  Finally, the assembling work is completed by retracting the shaft 11 to the left and the movable support base 15 to the right (FIG. 4).

  As described above, according to the embodiment of the present invention, almost no rotor weight is applied until the state shown in FIG. For this reason, the length of the shaft 11 can be made longer. For example, in the state shown in FIG. 1, the tip can be made long enough to penetrate the stator frame 1. If set in this way, the visibility of the fitting operation between the taper collar 13 and the taper ring 21 when the rotor 5 is mounted can be improved.

  Further, since the rigidity of the shaft 11 can be set sufficiently large, in the fitting operation of the bearing 6 and the bearing flange 2 and the fitting operation of the bearing flange 8 and the stator frame 1 in the final stage of the insertion operation shown in FIG. If the axes of the taper collar 13 and the taper collar 20 are aligned in advance, fine adjustment with the adjustment screw 14 and the adjustment screw 33 is not necessary. However, it is necessary to secure the positioning accuracy when the stator frame 1 is mounted to the same level as the fitting tolerance of the bearing and the bearing flange. Thus, in the present embodiment, an adjustment allowance for misalignment in the final stage of insertion work is provided, and fine adjustment with the adjustment screw is possible.

  In addition, according to the present embodiment, since the re-receiving operation is not necessary, the operation time of the entire rotating electrical machine assembly operation can be shortened. In addition, since high-precision positioning is not required when the rotor and the rotor frame are mounted, the time required for work preparation can be reduced. In addition, since it is not necessary to make the positional relationship between the guides that support the rotor strict, the accuracy of the apparatus can be reduced. In addition, since a high-precision positioning operation is not required while mounting a large heavy object, it is possible to suppress an increase in the size of the device and the driving means. In addition, there is no risk of collision between the rotor and the rotor frame because no reworking work is required, and the product load can be improved because the offset load on the product can be reduced during the insertion work. it can.

DESCRIPTION OF SYMBOLS 1 Stator frame 2 Bearing flange 3 Base 4 Stator frame mounting base 5 Rotor 6 Bearing 7 Bearing 8 Bearing flange 9 Fixed support base 10 Slide guide 11 Shaft 12 Cylinder 13 Taper collar 14 Adjustment screw 15 Moving support base 16 Rail 17 Thrust Screw 18 Motor 19 Shaft 20 Adjustment screw 21 Taper ring 22 Taper ring 23 Roller 24 Roller 25 Link 26 Link 27 Cylinder 28 Cylinder 29 Pin 30 Pin 31 Wire 32 Wire

Claims (5)

A stator frame mounting base for mounting the stator frame of the rotating electrical machine;
A fixed support base having a shaft that is concentric with the axis of the stator frame mounted on the mounting table and is movable in the axial direction, and has a tapered recess formed at the end of the stator frame mounting table. When,
A movable support base comprising a shaft that is concentric with the axis of the stator frame mounted on the mounting table and has a tapered recess formed at the end of the stator frame mounting table;
A rotor support roller that supports the rotor inserted into the stator frame so as to be movable in the axial direction;
A rotor shaft having tapered convex portions at both ends is sandwiched between a tapered concave portion formed on the fixed support base side shaft and a tapered concave portion formed on the movable support base side shaft. A rotor insertion device for a rotating electrical machine, wherein the rotor is inserted into a stator frame. In the rotor insertion device for a rotating electric machine according to claim 1,
The rotor support roller can be retracted after being sandwiched between a tapered recess formed in the shaft on the fixed support base side and a tapered recess formed in the shaft on the movable support base side. There is provided a rotor insertion device for a rotating electrical machine. In the rotor insertion device for a rotating electric machine according to claim 1,
The tapered recess formed in the shaft on the fixed support base side and the tapered recess formed in the shaft on the movable support base side can move in the radial direction with respect to the shaft axis. A rotor insertion device for a rotating electrical machine. A stator frame mounting base for mounting the stator frame of the rotating electrical machine;
A fixed support base having a shaft that is concentric with the axis of the stator frame mounted on the mounting table and is movable in the axial direction, and has a tapered recess formed at the end of the stator frame mounting table. When,
A movable support base comprising a shaft that is concentric with the axis of the stator frame mounted on the mounting table and has a tapered recess formed at the end of the stator frame mounting table;
A rotor support roller that supports the rotor inserted into the stator frame so as to be movable in the axial direction;
A rotor shaft having tapered convex portions at both ends is sandwiched between a tapered concave portion formed on the fixed support base side shaft and a tapered concave portion formed on the movable support base side shaft. Insert the rotor into the stator frame,
A bearing folder provided on the stator support base end side of the rotor is fitted to a flange provided on the stator support base end side of the stator frame, and the moving support base side end of the stator frame is fitted. A rotor insertion method for a rotating electrical machine, wherein a bearing flange provided on the moving support base side end of the rotor is fitted. A stator frame mounting base for mounting the stator frame of the rotating electrical machine;
A fixed support base having a shaft that is concentric with the axis of the stator frame mounted on the mounting table and is movable in the axial direction, and has a tapered recess formed at the end of the stator frame mounting table. When,
A movable support base comprising a shaft that is concentric with the axis of the stator frame mounted on the mounting table and has a tapered recess formed at the end of the stator frame mounting table;
A rotor support roller for supporting the rotor inserted into the stator frame so as to be movable in the axial direction;
The diameter of the shaft on the fixed support base side is smaller than the diameter of the bearing device fitted into the rotating shaft of the rotor,
Between the tapered concave portion formed on the fixed support base side shaft and the tapered concave portion formed on the movable support base side shaft, a rotor shaft having tapered convex portions formed at both ends is sandwiched, A rotor insertion method for a rotating electrical machine, wherein the shaft on the fixed support base side and the movable support base are driven in the axial direction to insert the rotor into a stator frame.

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