JP5711524B2 - Rotor maintenance device - Google Patents

Description

  The present invention extracts a rotor arranged in a vertical shape from a generator or an electric motor used in a power plant or the like, rolls over the extracted rotor, and places the rotor on a pair of support frames for inspection and repair. It relates to maintenance equipment.

  Generators and motors used in power plants, etc. are obliged to be inspected at predetermined intervals, and when there is an abnormality in the generator or motor, pull out the rotor from the generator or motor. Place the ends of the rotor shaft on a pair of support bases and hold them rotatably, or hang them horizontally with a crane, check for abnormalities in the rotor, and repair any abnormalities. Is going.

  There are generators and motors with rotors arranged vertically and horizontally, and when performing inspections etc., generators and motors with rotors arranged horizontally should only be pulled out horizontally. It is proposed that this extraction be performed mechanically. As such, in Patent Document 1 (Japanese Patent Laid-Open No. 2004-72891), a temporary work floor is provided above the side of the generator, and a portal crane is used. Lift the generator so that it is at the same position as the temporary workbench, attach the puller of the rotor puller provided on the temporary work floor to the end of the rotor, drive the wire rope connected to the puller, and Is extracted from the generator, the extracted rotor is lifted by a crane, and work is performed for inspection and repair.

  However, in an electric motor or generator in which the rotor is arranged vertically, the rotor pulled out by the crane must be overturned, and then both ends of the rotor shaft must be placed on a pair of support stands, respectively. The generator used in the power plant has a high weight of several tens of tons, so if you try to roll it over by mechanical means, it is inevitable to increase the size of the rollover device. Since the frequency is low and it is expensive to use such a rollover device, the current situation is that the rollover is performed by operating the crane.

  In this rollover by crane operation, after placing one end of the rotor shaft on one support frame of the pair of support frames in a state where the rotor extracted from the generator by the crane is suspended as it is, With the end as a fulcrum, the crane is operated to roll over to the other support frame, and the end of the rotor shaft is placed on each of the pair of support frames. The rotor is heavy, and the end of the rotor shaft that is placed on one of the support cradles at the time of rollover is a free end, so positioning is difficult and accompanying the movement of the center of gravity of the rotor during rollover Because the end of the rotor is easy to move back and forth and right and left on the support base, and it is easy to rotate, there is a risk that it will come off the support base. In order to placed on the sure, along with the need for skilled crane operation, there is a problem that it takes a long time to work.

  Therefore, the present invention has been made in view of the above-described problems of the prior art, and without requiring a skilled crane operation, a rotor extracted from a generator or an electric motor in which the rotor is vertically arranged. An object of the present invention is to provide a rotor maintenance device that can be safely and reliably rolled over and placed on a rotor support frame in a short time.

  The present inventors extract a rotor arranged vertically from a generator or an electric motor by a crane operation and roll it over to place one end of the shaft of the rotor on a pair of support frames. The rotor holding means for supporting the lower end portion of the rotor suspended from the crane is provided, and when the ball joint is provided on the holding means, the rotor is fixed to the holding means while the rotor is fixed to the holding means. The ball joint functions also as a bearing, and the rotor mounted on the support base can be rotated and inspected and repaired without removing the rotor holding means. Furthermore, it has been found that when the holding means is moved in the front-rear direction, the rotor can be accurately rolled over toward the other support frame, and the present invention has been completed.

That is, the said subject is solved by the following (1)-(8) of this invention.
(1) A rotor maintenance device that extracts a rotor arranged vertically in a generator or an electric motor, rolls over the extracted rotor, and rotatably mounts on a pair of support frames to inspect and repair the rotor. The one of the pair of support platforms has rotor holding means that can move in the front-rear direction on the support frame, and the rotor holding means has one end of the extracted shaft of the rotor. And a ball joint that supports the rotor holder so as to be rotatable in the vertical direction. The ball joint includes a ball provided on a bottom portion of the rotor holder via a support, and a support base. the movably disposed in the longitudinal direction, is composed of a housing for rotatably retaining the ball, to each of the pair of support cradle, and rotatable mounted to the rotor Sea urchin, rotor maintenance apparatus characterized by having a shaft roller table for supporting the rotor shaft.
(2) The rotor maintenance device according to (1), wherein the housing is provided with a slit through which the support column can pass at a portion facing the other support frame.
(3) The housing has a housing cover that prevents the held ball from coming off, the housing cover has a slit through which the support column passes, and the slit communicates with a slit provided in the housing. The rotor maintenance device according to item (2), characterized in that:
(4) Any one of the items (1) to (3), wherein the rotor holder is formed of a bottomed cylindrical member having a recess for accommodating an end of the rotor shaft. The rotor maintenance device described in 1.
(5) The rotor maintenance apparatus according to (4), wherein the rotor holder has a rotor holder cover that prevents the end of the rotor shaft housed in the recess from coming off.
(6) The rotor holder cover is composed of a split mold in which a cylindrical part having a flange on the inner surface of the upper end is divided into a plurality of parts, and the split mold is fitted to the upper side surface of the rotor holder and accommodated in the recess. The rotor maintenance device according to (5), wherein the rotor shaft is prevented from coming off.
(7) The rotor maintenance device according to any one of (1) to (6), wherein the shaft roller base includes a pair of rollers having rotating surfaces facing each other.
(8) The rotor maintenance according to any one of (1) to (7), wherein the rotor holding means is moved in the front-rear direction by a slide shaft provided on the one support frame. apparatus.

  In the present invention, since one support frame is provided with a rotor holder that includes a rotor holder that holds one end of the rotor shaft and a ball joint that rotatably supports the rotor holder in the vertical direction. At the time of rollover, since the rotor can be rolled over toward the other support frame with the end of the rotor shaft fixed to the holding means, the rollover operation can be performed safely and reliably. Further, since the rotor holding means can be moved in the front-rear direction, the rotor that is suspended by the crane by moving the rotor holding means when the rotor rolls over and the shaft end portion is fixed by the rotor holding means is As it moves, it tilts toward the other support frame, so that the rollover direction can be made accurate, and the subsequent rollover operation by crane operation can be easily performed. Furthermore, since the ball joint also functions as a bearing for the rotor holder, the rotor mounted on the pair of support bases can be rotated without removing the rotor holder, so that the rotor can be easily inspected and repaired.

  Further, the ball joint is composed of a ball provided on the bottom of the rotor holder via a support and a housing that rotatably holds the ball, and the support passes through a portion of the housing facing the other support frame. If a slit that can be formed is provided, this slit serves as a guide for the support provided on the ball when the rotor rolls over, so the rollover direction can be made more accurate.

  Furthermore, if the housing cover placed on the housing is provided with a slit through which the support provided on the ball passes and communicates with the slit provided on the housing, the support provided on the ball is not obstructed and can be easily attached to the housing. Can be done.

Further, the rotor holder is formed of a bottomed cylindrical member having a recess for accommodating the end of the rotor shaft, and the rotor holder cover is a split mold in which a cylindrical part having a flange on the upper end inner surface is divided into a plurality of parts. If constituted, this split mold is fitted to the upper side surface of the rotor holder cover, so that the rotor shaft is prevented from coming off, so that it can be easily attached to the rotor holder.

  Further, if the rollers provided on the shaft roller base are a pair of rollers with the rotation surfaces facing each other, the rotor placed on the pair of support bases is supported between the pair of rollers. In addition to facilitating movement in the left-right direction, work such as inspection can be performed safely and quickly.

The movement in the longitudinal direction of the rotor holding means, be performed in advance of one of the support cradle to set digit slide shaft, it is easy to move the rotor holding means can also accurately set its moving position.

It is the front view which represented a part of rotor maintenance device in the section, and shows the state where the rotor was mounted. It is a top view of a rotor maintenance apparatus, and shows the state which mounted the rotor. It is the front view which showed the principal part of the rotor maintenance apparatus, and represented the one part with the cross section, and shows the state which mounted the rotor. In FIG. 3, it is the side view which represented the part with the cross section. A rotor holder is shown, (a) is front sectional drawing of a rotor holder cover, (b) is front sectional drawing of a rotor holder. It is a front view of a ball of a ball joint. The housing of a ball joint is shown, (a) is a top view of the housing cover, (b) is a front sectional view of the housing cover, (c) is a front sectional view of the housing body, and (d) is a front sectional view of the housing body. It is side surface sectional drawing. A shaft roller base is shown, (a) is a front view, (b) is a top view.

A rotor maintenance device of the present invention includes a pair of support platforms on which a rotor that has been rolled over is placed, and one of the support platforms is provided with rotor holding means that can move in the front-rear direction on the support platform, A rotor holder that holds one end of the extracted rotor shaft and a ball joint that is provided at the bottom of the rotor holder and supports the rotor holder so as to be rotatable in the vertical direction. Each is equipped with a shaft roller base that supports the shaft of the rotor, so that the rotor arranged vertically from the generator or the electric motor is extracted by a crane, rolled over and placed on a pair of support platforms, securely to roll the rotor with can be placed on the rotor support cradle, in which can be rotatably holds the placed the rotor.

Hereinafter, the present invention will be described in detail based on embodiments of the drawings.
As shown in FIGS. 1 and 2, the rotor maintenance device (100) of the present invention includes a pair of support platforms (110) and (120) that respectively support both ends of the shaft (R1) of the rotor (R) that has been rolled over. These are formed in a rectangular parallelepiped shape using H-shaped steel.

One support frame (110) (hereinafter referred to as a load side support frame) is provided with a rotor holding means (130) including a rotor holder (140) and a ball joint (150), and the load side support frame is provided. (110) and the other support frame (120) (hereinafter referred to as the anti-load side support frame) are provided with both end portions of the rotor shaft (R1) so that the mounted rotor (R) can be rotated. A supporting shaft roller base (190) is provided.

  As shown in FIGS. 3 and 4, the load-side support frame (110) is provided with a pair of linear rails (111) and (112) on both sides for supporting the rotor holding means (130) so as to be movable in the front-rear direction. In the center, a slide shaft (113) for moving the rotor holding means (130) in the front-rear direction is provided. Further, the slide shaft (113) is formed with a thread, and a handle (114) is provided at one end thereof, and the slide shaft (113) is advanced and retracted by the rotation of the handle (114).

The rotor holding means (130) has a rotor holder (140) and a ball joint (150), and the rotor (R) has a large-diameter portion (with a ring (r) attached to the end of the rotor shaft (R1) ( R1a), and the ring (r) and the rotor holder (140) form a coupling so that the rotor (R) is held by the rotor holder (140).

The ball joint (150) includes a ball (160) provided on the bottom of the rotor holder (140) and a casing (170) that supports the ball (160). The casing (170) The casing body (171) and the plate-like base (172) for supporting (160) are integrated, and the bottom of the casing body (171) is screwed to the base (172) with a screw or the like to be integrated.

At the bottom of the base (172), a pair of guide members (173) fitted to the pair of linear rails (111), (112) provided on the load side support frame (110) is provided, and the rotor holding means (130) is provided. ) Is slid in the front-rear direction while restricting the movement in the left-right direction. The other end of the slide shaft (113) provided on the load side support frame (110) is attached to the base (172), and the slide shaft (113) is advanced and retracted by rotating the handle (114). The rotor holding means (130) moves in the front-rear direction on the load side support frame (110).

As shown in FIG. 5, the rotor holder (140) is made of a cylindrical member with a bottom, and the recess (141) accommodates the large diameter portion (R1a) at the end of the rotor shaft (R1). Yes. A cylindrical ball holding part (142) is formed on the bottom of the rotor holder (140), and a thread is formed on the inner surface thereof.

  In addition, a rotor holder cover (not shown) that prevents the large-diameter portion (R1a) from coming off when the large-diameter portion (R1a) of the rotor shaft (R1) is received in the concave portion (141) is provided on the upper portion of the rotor holder (140). 143). The rotor holder cover (143) is a split mold composed of a pair of semi-cylindrical members (144), (145), and flanges (146), (147) are provided on the inner surfaces of these upper ends, and a pair of semi-cylindrical members When the cylindrical members (144) and (145) are attached to the rotor holder (140), the flanges (146) and (147) have a larger diameter than the rotor shaft (R1) and a large diameter portion at the end of the shaft ( An opening (148) having a smaller diameter than R1a) is formed, and semi-cylindrical members (144) and (145) are mounted so as to face the upper portion of the rotor holder (140), and the side surface of the rotor holder (140) is attached by screws. The large diameter portion (R1a) of the rotor (R) accommodated in the recess (141) of the rotor holder (140) is locked to prevent the rotor (R) from coming off.

As shown in FIG. 6, the ball (160) constituting the ball joint (150) has a columnar column (161), and a screw thread is formed on the outer surface of the upper portion (161a) of the columnar column (161). The upper part (161a) of the support post (161) is screwed to the cylindrical ball holding part (142) provided on the rotor holder (140), whereby the rotor holder (140) and the ball (160) are Are detachably integrated.

As shown in FIG. 7, the casing body (171) is formed of a columnar member, and a recess (174) for accommodating the ball (160) provided on the rotor holder (140) is formed therein. The recess (174) is composed of a space (175) having a circular cross section and a frustoconical space (176) connected to the lower portion thereof, and a ball (160) accommodated in the recess (174). The bottom surface of the recess (174) is fitted with a bottom plate (177) made of phosphor bronze so that the contact surface with the ball (160) is reduced. Slidability of the ball (160) is prevented.

In addition, a slit (178) communicating with the recess (174) of the casing body (171) is formed on the side surface of the casing body (171) at a portion facing the anti-load-side support base (120), and the rotor (R ) Rolls up and down so that the column (161) provided on the ball (160) can turn in the vertical direction, and serves as a guide when the rotor (R) rolls over, 120) can be accurately rolled over.

  Further, a casing cover (180) for preventing the ball (160) from coming off when the ball (160) is accommodated in the recess (174) of the casing body (171) is provided on the upper portion of the casing body (171). Yes.

The casing cover (180) is formed of a disk-like member having the same diameter as the casing main body (171), and a rib (181) that fits into the recess (174) of the casing main body (171) is provided at the lower part thereof. ing. The inner surface of the rib (181) is an inclined surface (181a) that expands downward, and supports the accommodated ball (160) together with the recess (174) of the casing body (171). The casing cover (180) is provided with a slit (182), and the casing cover (180) is inserted onto the casing body (171) by inserting from the side surface of the casing body (171) through the slit (182). I try to install it. The slit (182) communicates with a slit (178) provided in the housing main body (171) so that a support post (161) provided on the ball (160) can be rotated in the vertical direction.

As shown in FIG. 8, the shaft roller base (190) provided on the load-side support base (110) and the anti-load-side support base (120) has a pair of rollers (191), (192) with the rotation surfaces facing each other. The pair of rollers (191), (192) is disposed in the roller housing (193), and the roller housing (193) is a pair of plate-like bodies disposed opposite to each other on the plate-like base (194). (195), (196) and side plates (197), (198) provided at both ends thereof, and the shafts (191a), (192a) of the rollers (191), (192) are paired with a pair of plate-like bodies. (195) and (196). When the rotor (R) is placed on the pair of support platforms (110) and (120), the rotor shaft (R1) is supported between the pair of rollers (191) and (192), and the rotor (R ) Can be rotated , and movement in the left-right direction is prevented.
If it has a recess (141) that can accommodate the end of the rotor shaft (R1)

  Thus, in the rotor maintenance device (100) of the present invention, since the rotor holding means (130) has the ball joint (150), the rotor (R) is extracted from the generator or electric motor in which the rotor (R) is vertically arranged by a crane. Since the end of the rotor shaft (R1) of the rotor (R) can be rolled over while being fixed by the rotor holder (140), it can be safely and accurately placed on the pair of support frames (110), (120). Furthermore, the rotor (R) placed on the support base (110) can be rotated while being prevented from moving in the left-right direction by the pair of rollers (191), (192) of the shaft roller base (190). Maintenance work such as inspection and repair of (R) can be easily performed.

  This embodiment is an example of the present invention, and various modifications can be made. For example, in the above embodiment, the support bases (110) and (120) are formed in a rectangular parallelepiped shape with H-shaped steel. However, if the support bases (110) and (120) have rigidity capable of mounting the rotor (R), the shape is a table shape. Any member such as a box shape may be used, and the constituent members are not limited to the H-shaped steel, and other shapes such as other steel shapes or aluminum may be used.

  In the embodiment, the rotor holder (140) is formed of a cylindrical member with a bottom so that the end of the rotor shaft (R1) can be accommodated therein, but the end of the rotor shaft (R1) is formed. As long as it has a recess (141) that can be accommodated, its shape may be any shape such as a polygonal cylindrical body.

  Further, the rotor holder cover (143) is a split mold composed of two semi-cylindrical members (144) and (145), but may be three or more split molds, and the rotor holder (140) has a recess. (141) A plurality of L-shaped members may be used as the cover so as to protrude upward.

  The casing body (171) that supports the ball (160) may have any shape as long as the recess (174) that can accommodate the ball (160) can be formed, and the inner surface of the recess (174) may be spherical. Good. The casing (170) is composed of the casing body (171) and the base (172), and these are integrated by screwing, but may be fixed by welding or the like, and only the casing body (171). May be.

In addition, the pair of rollers (191) and (192) that rotatably support the mounted rotor shaft (R1) can be used to force the mounted rotor by using one or both of them as drive rollers even in free rotation. The rotor shaft (R1) may be supported by three or more rollers.

  Further, as a means for moving the rotor holding means (130) in the front-rear direction, the slide shaft (113) is moved forward and backward, but a member having a thread that engages with the thread of the slide shaft (113) is used as a base. The roller holding means (130) may be moved by rotation of the slide shaft (113) or may be moved by a pulling means such as a wire.

Next, an operation of placing the rotor (R) on the pair of support platforms (110) and (120) using the rotor maintenance device (100) of the present invention will be described.
First, a hook of a crane (not shown) is engaged with a gripping part (not shown) provided on one end face of a generator rotor (R) arranged vertically, and then the rotor R is moved from the generator or motor to the rotor R. Is extracted in the vertical direction, and the extracted rotor is moved to the vicinity of the pair of support platforms (110) and (120) in a state where the rotor is suspended from the crane.

  Next, the rotor holder (140) is attached to the rotor large diameter portion (R1a) of the rotor shaft (R1) having the ring (r) attached to the lower end portion. For this attachment, a rotor holder (140) provided with balls (160) is previously placed on a holding base (not shown), and a crane is operated in a recess (141) of the rotor holder (140) by operating a crane. Insert the large-diameter portion (R1a) of (R1) and attach the half-cylindrical members (144) and (145) that constitute the rotor holder cover (143) to the upper part from both sides of the rotor holder (140). By fixing to the rotor holder (140) with screws or the like, the mounting of the rotor shaft (R1) is completed.

  The ball (160) may be attached to the rotor holder (140) after the rotor holder (140) is attached to the large diameter portion (R1a) of the rotor shaft (R1), but the rotor suspended by a crane. Since the end portion of (R) is a free end, it is easy to move and attachment work becomes difficult. Therefore, it is preferable to attach the rotor (R) after attaching the spherical body (160) to the rotor holder (140) in advance.

Thus, after attaching the rotor holder (140) to the large diameter part (R1a) of the rotor shaft (R1), the rotor holder (140) is moved onto the load side support frame (110) by the crane. Since the casing (170) having a recess (174) for accommodating the ball (160) is disposed on the load side support frame (110), the rotor holder (140) is provided in the recess (174). The ball (160) is inserted, and the casing cover (180) is attached to the upper surface of the casing body (171). At that time, the casing cover (180) is provided with a slit (182) through which the support (161) provided on the ball (160) can pass, so that the slit (82) is formed from the upper side of the casing body (171). Is placed on the upper surface of the housing main body (171) and fixed to the casing main body (171) with screws or the like.

Next, the rotor (R) in which the lower end portion of the rotor shaft (R1) is fixed by the rotor holding means (130) is held by the crane at the upper end portion of the rotor shaft (R1). The rotation of the ball joint (150) allows the rotor (R) to roll over toward the anti-load side support frame (120) with the end of the rotor shaft (R1) fixed to the rotor holder. In this rollover, the rotor holding means (130) holding the large-diameter end (R1a) of the rotor shaft (R1) is predetermined when the rotor (R) is placed on the pair of support frames (110) and (120). Therefore, when the rotor holding means (130) is moved rearward by the rotation operation of the slide shaft (113) provided on the load side support frame (110), the rotor holding means (130 ), The end of the rotor shaft (R1) fixed to the rotor holding means (130) also moves backward, and the rotor (R) tilts toward the anti-load-side support frame (120). When the wire of the crane is drawn out, it can be accurately rolled over toward the anti-load side support frame (120) using the slit (174) provided in the housing (170) as a guide.

As described above, the rotor (R) that has been rolled over has a pair of rollers (191) of the shaft roller base (190) provided at both ends of the rotor shaft (R1) at the pair of support bases (110) and (120), (192) is placed and can be rotated by the pair of rollers (191) and (192). Therefore, the rotor (R) is rotated for inspection, and if there is an abnormality, the rotor (R ) Stop rotation and perform repairs. At this time, since the shaft (R1) of the rotor (R) is placed between the pair of rollers (191) and (192), it can be safely inspected without moving in the horizontal direction. it can.

DESCRIPTION OF SYMBOLS 100 ... Rotor maintenance apparatus 110 ... Load side support stand 111, 112 ... Linear rail 113 ... Slide axis 114 ... Handle 120 ... Anti-load side support stand 130 ... Rotor holding means 140... Rotor holder 141... Recess 142. Ball holder 143... Rotor holder cover 144, 145... Semi-cylindrical members 146, 147. · Ball joint 160 ··· Ball 161 ··· Column 161a ··· Column upper portion 170 · · · Housing 171 · · · Housing body 172 · · · Base 173 · · · Guide member 174 · · · depressions 175 and 176 · .... Space part 177 ... Bottom plate 178 ... Slit 180 ... Casing cover 181 ... Rib 181a ... Inclination 182 ... slit 190 ... shaft roller base 191, 192 ... roller 191a, 192a ... shaft 193 ... housing 194 ... base 195, 196 ... plate-like body 197, 198 ...・ Side plate R ・ ・ ・ Rotor R1 ・ ・ ・ Rotor shaft R1a ・ ・ ・ Large diameter part r ・ ・ ・ Ring

JP 2004-72891 A

Claims (8)

A rotor maintenance device that extracts a rotor arranged vertically in a generator or an electric motor, rolls the extracted rotor over, and rotatably mounts it on a pair of support stands to inspect and repair the rotor. One support frame of the pair of support frames has a rotor holding means that can move in the front-rear direction on the support frame, and the rotor holding means holds one end portion of the extracted rotor shaft. And a ball joint that rotatably supports the rotor holder in a vertical direction. The ball joint includes a ball provided on a bottom portion of the rotor holder via a support, and a front and rear direction on the support frame. movably disposed, it is composed of a housing for rotatably retaining the ball, to each of the pair of support cradle, so as to be rotatable mounted to the rotor Rotor maintenance apparatus characterized by having a shaft roller table for supporting the rotor shaft. The rotor maintenance device according to claim 1, wherein the housing is provided with a slit through which the column can pass at a portion facing the other support frame.   The housing has a housing cover that prevents the held ball from coming off, the housing cover has a slit through which the support column passes, and the slit is connected to a slit provided in the housing. The rotor maintenance apparatus according to claim 2, wherein   The rotor maintenance device according to any one of claims 1 to 3, wherein the rotor holder is formed of a bottomed cylindrical member having a recess for accommodating an end portion of a rotor shaft.   The rotor maintenance device according to claim 4, wherein the rotor holder has a rotor holder cover that prevents the end of the rotor shaft housed in the recess from coming off.   The rotor holder cover is composed of a split mold in which a cylindrical part having a flange at the upper end is divided into a plurality of parts, and the end of the rotor shaft accommodated in the recess by fitting the split mold to the upper side surface of the rotor holder The rotor maintenance device according to claim 5, wherein the part is prevented from coming off.   The rotor maintenance device according to any one of claims 1 to 6, wherein the shaft roller base has a pair of rollers whose rotation surfaces are opposed to each other.   The rotor maintenance device according to any one of claims 1 to 7, wherein the rotor holding means is moved in the front-rear direction by a slide shaft provided on the one support frame.

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