JP6515333B2 - Apparatus and method for disassembling rotating electrical machine - Google Patents

Description

  The present invention relates to a disassembling apparatus and a disassembling method of a rotating electrical machine capable of efficiently performing disassembling work when disassembling the rotating electrical machine.

  Generally, in a generator installed in a power plant etc., when performing maintenance such as inspection, repair, cleaning, etc., it is necessary to remove main parts such as a rotor, a stator, bearings from the inside of the frame each time . As described above, when removing the main parts from the inside of the frame, it is first necessary to disassemble the bracket closing the opening at both ends of the frame from the frame.

  However, many of the parts that make up the generator are heavy, so when disassembling the generator, use a large crane, chain block, etc. to lift each part horizontally or vertically I was trying to pull out in the direction.

  Thus, for example, Patent Document 1 discloses a conventional generator disassembling apparatus as described above.

International Publication No. 2010/032277

  Here, in the above-mentioned conventional disassembling apparatus, the trolley is movably supported on a rail installed at the upper portion of the frame of the generator, and the chain block is attached to the trolley. And when removing a bracket from a frame, after lifting a bracket by a chain block, it is made to move to the outer side of a frame by a trolley.

  Further, in the generator, a cooler is provided at the top of the frame, and the cooler cools each component in the inside of the frame. Among such generators provided with a cooler at the top of the frame, there is a generator adopting a configuration in which the cooler protrudes outward in the rotational axis direction relative to the frame.

  Therefore, when trying to apply the above-mentioned conventional disassembling apparatus to the above-mentioned generator, the cooler must be removed prior to removing the bracket, and a large work place where a large number of work steps and safety are taken into consideration It will be necessary.

  Furthermore, in the above-described generator, the cooler may be installed to cover the bracket attached to the frame from above. Even in such a generator, since the bracket can not be lifted immediately above, the cooler must be removed prior to the removal of the bracket, which makes the entire generator very complicated to be disassembled. .

  Therefore, this invention solves the said subject, and it aims at providing the disassembly apparatus and disassembly method of the rotary electric machine which can achieve space saving of disassembly operation | work, and shortening of disassembly time.

According to a first aspect of the present invention for solving the above-mentioned problems, the disassembling apparatus for a rotating electrical machine is:
A cylindrical frame which rotatably supports a rotating shaft inside via a bearing;
A bracket that closes the opening at both ends in the rotational axis direction of the frame and the rotational axis passes through the central portion;
A decomposing apparatus for a rotating electrical machine, comprising: a cooler provided at an upper portion of the frame so as to have a projecting portion projecting outward in the rotational axis direction further than the bracket and cooling the inside of the frame;
An upper bracket piece forming an upper half of the bracket;
A hanging jig disposed between the projecting portion and extending in the frame width direction;
Connection means for connecting the upper bracket piece and the suspension jig;
Side support portions provided on both sides of the overhang portion in the frame width direction;
A pair of left and right first support portions in the frame width direction formed on the suspension jig,
First lifting means connected between the side support portion and the first support portion to lift the lifting jig upward;
A hook member provided outside the upper bracket piece and the side surface support in the direction of the axis of rotation and above the side surface support, and supported movably;
A pair of left and right second support portions in the frame width direction formed on the inner side in the frame width direction than the first support portions in the suspension jig,
It is connected between the hook member and the second support portion, and is provided with a second lifting means for lifting the lifting jig upward.

The disassembling method of the rotating electrical machine according to the second invention for solving the above-mentioned problems is
A cylindrical frame which rotatably supports a rotating shaft inside via a bearing;
A bracket that closes the opening at both ends in the rotational axis direction of the frame and the rotational axis passes through the central portion;
A method of disassembling a rotating electrical machine, comprising: a cooler provided at an upper portion of the frame so as to have a projecting portion projecting outward in the rotational axis direction further than the bracket and cooling the inside of the frame;
A hanging jig extending in the width direction of the frame is disposed between the upper bracket piece forming the upper half of the bracket and the projecting portion, and connected to the upper bracket piece;
The first lifting means connected between a side support portion provided on both sides in the frame width direction of the overhanging portion and a pair of first support portions in the frame width direction formed on the suspension jig. Lift the lifting jig upwards,
A hook member provided outside the upper bracket piece and the side surface support portion in the rotational axis direction and above the side surface support portion, and in the frame width direction than the first support portion in the suspension jig The second lifting means connected between the pair of left and right second support portions to be formed lifts the lifting jig diagonally upward,
The hook member is moved to move the lifting jig outward in the rotation axis direction.

  Therefore, according to the disassembling apparatus and the disassembling method of the rotating electrical machine according to the present invention, only the upper bracket piece can be removed from the frame without removing the cooler having the overhang from the frame, so the space saving operation can be performed. And decomposition time can be shortened.

It is a front view of a generator in which a cooler is installed in the upper part of a frame. It is a front view of the decomposition device concerning one example of the present invention. It is a side view of the decomposition device concerning one example of the present invention. It is operation | movement explanatory drawing which showed the decomposition | disassembly method based on one Example of this invention, Comprising: It is the figure which showed a mode at the time of the decomposition | disassembly start of a bracket. It is operation | movement explanatory drawing following FIG. 4, Comprising: It is the figure which showed a mode at the time of the completion | finish of decomposition | disassembly of a bracket.

  Hereinafter, the disassembling apparatus and the disassembling method of the rotating electrical machine according to the present invention will be described in detail using the drawings.

  First, the configuration of a turbine generator 1 as a rotating electrical machine to which the disassembling apparatus and the disassembling method according to the present invention are applied will be described with reference to FIG.

  As shown in FIG. 1, the generator 1 has a frame 11 forming a rectangular cylinder. A rotating shaft 12 is rotatably supported inside the frame 11 via a plurality of bearings 13, and the bearings 13 are provided at both ends in the rotating shaft direction in the frame 11. The openings at both ends in the rotational axis direction of the frame 11 are closed by the brackets 14.

  Further, a cooler 20 is installed on the top of the frame 11. The cooler 20 can cool the cooling air by heat-exchanging the cooling water taken from the outside of the generator 1 with the cooling air flowing in the frame 11. Furthermore, in the cooler 20, main components (rotor, stator, winding, rotation) of the generator 1 are supplied by supplying the cooled cooling air from the top of the frame 11 toward the inside of the frame 11. It is possible to cool the shaft, bearings, etc.).

  Here, the length in the rotational axis direction of the cooler 20 is longer than the length in the rotational axis direction of the frame 11. That is, the overhanging portions 21 are formed at both end portions in the rotational axis direction of the cooler 20. The overhanging portion 21 bulges outward from the rotational axis direction both end portions of the cooler 20 outward in the rotational axis direction, and protrudes further outward in the rotational axis direction than the bracket 14 attached to the frame 11 There is. In other words, the overhanging portions 21 of the cooler 20 are disposed immediately above the brackets 14 attached to both end portions of the frame 11 in the rotational axis direction.

  Next, the configuration of the disassembling apparatus according to the present invention will be described using FIGS. 2 and 3.

  As shown in FIG. 2 and FIG. 3, the bracket 14 has a disk shape, and has an upper and lower split structure. Specifically, the bracket 14 is composed of an upper semicircular bracket piece 15 and a lower semicircular bracket piece 16. The upper semicircular bracket piece 15 forms an upper half portion of the bracket 14 with the rotary shaft 12 as a boundary, and has a semi-disc shape. On the other hand, the lower semicircular bracket piece 16 forms a lower half portion of the bracket 14 with the rotary shaft 12 as a boundary, and has a semi-disc shape.

  The upper semicircular bracket piece 15 and the lower semicircular bracket piece 16 are each attached to the frame 11 by a plurality of mounting bolts (not shown), and are mutually connected by a plurality of connecting bolts (not shown). There is.

  Further, a central hole 14 a is formed at the central portion of the bracket 14, and the rotary shaft 12 passes through the central hole 14 a. That is, the upper semicircular portion 15 a is formed at the lower end central portion of the upper semicircular bracket piece 15 so as to cut out the lower end thereof. On the other hand, a lower semicircular portion 16 a is formed in the upper end central portion of the lower semicircular bracket piece 16 so as to cut out the upper end thereof. As a result, the center hole 14a is also divided into upper and lower halves, and is composed of an upper semicircular portion 15a and a lower semicircular portion 16a.

  Further, on the outer surface (outside end surface in the rotation axis direction) of the upper semicircular bracket piece 15, there are formed longitudinal edges 15b which are a left-right pair in the frame width direction. These vertical edges 15b extend vertically in the left and right sides in the frame width direction of the upper semicircular portion 15a, and are arranged at the same distance from the axial center of the rotary shaft 12 in the frame width direction. And the suspension hole 15c is formed in the upper end part of the vertical edge 15b, respectively. The suspension hole 15c penetrates the vertical edge 15b in the frame width direction (the thickness direction of the vertical edge 15b), and the bracket-side shackle 17 can be attached to the suspension hole 15c.

  On the other hand, on the outer surface (outside end surface in the rotation axis direction) of the lower semicircular bracket piece 16, there are formed longitudinal edges 16b which are a left and right pair in the frame width direction. These vertical edges 16b extend vertically in the left and right sides in the frame width direction of the lower semicircular portion 16a, and are arranged at the same distance from the axial center of the rotary shaft 12 in the frame width direction. And the suspension hole 16c is formed in the lower end part of the vertical edge 16b, respectively. The hanging hole 16c penetrates the longitudinal edge 16b in the frame width direction (the thickness direction of the longitudinal edge 16b).

  On the other hand, cooler side suspension holes (side support portions) 23 are provided on the left and right side surfaces 22 in the cooler width direction (frame width direction) of the overhang portion 21 of the cooler 20.

  Here, in the disassembling apparatus and the disassembling method according to the present invention, the hanging jig 30 serving as a rectangular rod-like member is used.

  Therefore, as shown in FIGS. 2 and 3, the suspension jig 30 is extended in the frame width direction and the cooler width direction, and is disposed between the bracket 14 and the overhang portion 21 in the vertical direction. ing. That is, the lifting jig 30 is extended horizontally in the frame width direction between the upper semicircular bracket piece 15 and the overhanging portion 21. At this time, the length of the hanging jig 30 extended in the frame width direction is longer than the width (length in the width direction of the cooler 20) of the overhanging portion 21, and the length of the hanging jig 30 The direction intermediate portion is disposed at the same position as the axial center of the rotation shaft 12 in the frame width direction.

  A pair of left and right through holes 31 are formed in the longitudinal direction central portion of the suspending jig 30 so as to penetrate in the rotational axis direction (the thickness direction of the suspending jig 30). The through holes 31 are distributed to the left and right of the middle portion of the hanging jig 30 in the longitudinal direction, and right and left hanging holes 15 c are located immediately below them. At this time, the spacing between the through holes 31 (the spacing in the lengthwise direction of the hanging jig 30) arranged to be distributed to the left and right is the same spacing as the spacing between the pair of left and right hanging holes 15c.

  A jig-side shackle 32 is attached to the through hole 31, and the jig-side shackle 32 is connected to the bracket-side shackle 17. The hanging hole 15c, the bracket side shackle 17, the through hole 31, and the jig side shackle 32 constitute a connecting means.

  Further, a pair of left and right through holes (first support portions) 33 are formed in the longitudinal direction both side portions of the suspension jig 30 so as to penetrate in the rotational axis direction (the thickness direction of the suspension jig 30) There is. The through holes 33 are distributed leftward and rightward centering on the middle portion in the length direction of the suspension jig 30, and are arranged outside the side surface 22 of the overhang portion 21 in the frame width direction. That is, the cooler side suspension holes 23 are located above the through holes 33.

  The upper end of the wire rope 41 is supported by the cooler-side suspension hole 23, and the chain block 42 is supported by the lower end of the wire rope 41. Furthermore, the chain of the chain block 42 is connected to the through hole 33. That is, the wire rope 41 and the chain block 42 are for suspending the lifting jig 30 at two points by connecting the cooler side suspending hole 23 and the through hole 33, and constituting the first lifting means. It has become.

  Furthermore, a pair of left and right eye bolts (second support portions) 34 are fastened to the upper surface of the suspension jig 30. These eyebolts 34 are distributed leftward and rightward centering on the middle portion in the lengthwise direction of the hanging jig 30. At this time, the distance between the pair of left and right eyebolts 34 is different from the distance between the pair of left and right through holes 31. In the example shown in FIG. 2, the distance between the pair of left and right eyebolts 34 is the pair of left and right through holes It is narrower than the interval between 31.

  On the other hand, above the cooler 20, a crane hook (hook member) 51 such as a crane car or an overhead crane is movably provided. The crane hook 51 is disposed outside the upper semicircular bracket piece 15 and the cooler-side suspension hole 23 in the rotational axis direction and above the cooler-side suspension hole 23. And the middle part in one wire rope 52 is hooked by the crane hook 51, The chain block 53 is each supported by the both ends of this wire rope 52. As shown in FIG. Furthermore, the chain of the chain block 53 is connected to the eyebolt 34.

  That is, the wire rope 52 and the chain block 53 can be moved in the rotation axis direction and the vertical direction by the operation of the crane hook 51 while suspending the suspension jig 30 at two points by connecting the eye bolt 34 and the crane hook 51 And constitutes the second lifting means.

  Next, the disassembling method according to the present invention will be described with reference to FIG. 2 and FIG.

  First, the mounting bolt and connecting bolt on which the upper semicircular bracket piece 15 is attached are removed.

  Next, as shown in FIG. 2 and FIG. 3, after the hanging jig 30 is arranged horizontally between the overhanging portion 21 of the cooler 20 and the bracket 14, the hanging hole of the upper semicircular bracket piece 15 The bracket side shackle 17 attached to 15c and the jig side shackle 32 attached to the through-hole 31 of the suspension jig 30 are connected.

  At the same time, the cooler side suspension hole 23 of the overhang portion 21 and the through hole 33 of the suspension jig 30 are connected by the wire rope 41 and the chain block 42. Further, the eyebolt 34 of the lifting jig 30 and the crane hook 51 are connected by the wire rope 52 and the chain block 53.

  Then, as shown in FIG. 4, the pair of left and right chain blocks 42 are simultaneously used to lift the lifting jig 30 upward while maintaining the hanging jig 30 in a horizontal state. At this time, the lifting height of the hanging jig 30 by the chain block 42 is a height at which the hanging jig 30 does not contact the overhanging portion 21. Thus, along with the lifting of the lifting jig 30, the upper semicircular bracket piece 15 is also lifted upward, and the upper semicircular bracket piece 15 is removed from the frame 11 and the lower semicircular bracket piece 16.

  Then, as shown in FIG. 5, the lifting jig 30 is lifted obliquely upward using the pair of left and right chain blocks 52 simultaneously. Thereby, along with the lifting of the lifting jig 30, the upper semicircular bracket piece 15 is also lifted obliquely upward, and the upper semicircular bracket piece 15 is raised until it is positioned outside the overhanging portion 21 in the rotational axis direction. Do.

  Then, the crane hook 51 is moved outward in the rotational axis direction, and the upper semicircular bracket piece 15 is moved outward in the rotational axis direction with the lifting jig 30.

  Next, the chain block 42 is removed from the through hole 33 of the lifting jig 30 and the wire rope 42, and then the crane hook 51 is moved to move the upper semicircular bracket piece 15 to a predetermined location.

  Therefore, according to the disassembling apparatus and disassembling method according to the present invention, only the upper semicircular bracket piece 15 can be removed from the frame 11 without removing the cooler 20 having the overhang 21 from the frame 11, so disassembling. It is possible to save the work space and shorten the disassembly time. As a result, maintenance work such as inspection, repair, and cleaning of the generator 1 can be easily performed.

  In the embodiment described above, the frame 11 is a rectangular cylinder, but it can accommodate components such as a rotor, a stator, a winding, a rotating shaft, and a bearing, which are required to generate power. And as long as it is a frame which can install a cooler on the upper part, the shape of the cylinder may be what kind of shape.

  In the embodiment described above, one crane hook 51 and two eye bolts 34 are connected by one wire rope 52 and two chain blocks 53. The wire rope 52 may be prepared, the wire rope 52 and the chain block 53 may be connected one by one, and further, these may be connected to the two eyebolts 34, respectively.

  The disassembling apparatus and the disassembling method of the rotating electrical machine according to the present invention can be easily disassembled, and therefore, can be extremely usefully used as a measure for reducing maintenance costs.

DESCRIPTION OF SYMBOLS 1 Generator 11 Frame 12 Rotating shaft 13 Bearing 14 Bracket 14a Center hole 15 Upper semicircle bracket piece 15a Upper semicircle portion 15b Vertical edge 15c Suspension hole 16 Lower semicircle bracket piece 16a Lower semicircle portion 16b Vertical edge 16c Suspension hole 17 Bracket-side shackle 20 Cooler 21 Overhang 22 Side 23 Cooler-side suspension hole 30 Suspension jig 31 Through hole 32 Jig side shackle 33 Through hole 34 Eyebolt 41 Wire rope 42 Chain block 50 Crane hook 51 Wire rope 52 Chain block

Claims (2)

A cylindrical frame which rotatably supports a rotating shaft inside via a bearing;
A bracket that closes the opening at both ends in the rotational axis direction of the frame and the rotational axis passes through the central portion;
A decomposing apparatus for a rotating electrical machine, comprising: a cooler provided at an upper portion of the frame so as to have a projecting portion projecting outward in the rotational axis direction further than the bracket and cooling the inside of the frame;
An upper bracket piece forming an upper half of the bracket;
A hanging jig disposed between the projecting portion and extending in the frame width direction;
Connection means for connecting the upper bracket piece and the suspension jig;
Side support portions provided on both sides of the overhang portion in the frame width direction;
A pair of left and right first support portions in the frame width direction formed on the suspension jig,
First lifting means connected between the side support portion and the first support portion to lift the lifting jig upward;
A hook member provided outside the upper bracket piece and the side surface support in the direction of the axis of rotation and above the side surface support, and supported movably;
A pair of left and right second support portions in the frame width direction formed on the inner side in the frame width direction than the first support portions in the suspension jig,
A disassembly device for a rotating electrical machine, comprising: second lifting means connected between the hook member and the second support portion and lifting the lifting jig upward. A cylindrical frame which rotatably supports a rotating shaft inside via a bearing;
A bracket that closes the opening at both ends in the rotational axis direction of the frame and the rotational axis passes through the central portion;
A method of disassembling a rotating electrical machine, comprising: a cooler provided at an upper portion of the frame so as to have a projecting portion projecting outward in the rotational axis direction further than the bracket and cooling the inside of the frame;
A hanging jig extending in the width direction of the frame is disposed between the upper bracket piece forming the upper half of the bracket and the projecting portion, and connected to the upper bracket piece;
The first lifting means connected between a side support portion provided on both sides in the frame width direction of the overhanging portion and a pair of first support portions in the frame width direction formed on the suspension jig. Lift the lifting jig upwards,
A hook member provided outside the upper bracket piece and the side surface support portion in the rotational axis direction and above the side surface support portion, and in the frame width direction than the first support portion in the suspension jig The second lifting means connected between the pair of left and right second support portions to be formed lifts the lifting jig diagonally upward,
A method of disassembling a rotating electrical machine, wherein the hook member is moved to move the lifting jig outward in the direction of the rotation axis.

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