JP5429443B2 - Balance correction device - Google Patents

Description

  The present invention corrects the rotational balance of a rotating machine by at least partially removing a removal target portion that is a portion that rotates integrally with a rotating shaft of a rotating machine such as a turbocharger, a turbo compressor, or a gas turbine. The present invention relates to a balance correction device.

  In rotating machines such as a supercharger, a turbo compressor, and a gas turbine, the rotational balance is corrected.

  The conventional rotation balance correction will be described using a turbocharger as an example.

  A supercharger is a device that supplies compressed air to an engine by using exhaust gas energy of an engine mounted on a vehicle or a ship. The turbocharger includes a turbine blade that is rotationally driven by engine exhaust gas, a compressor blade that rotates integrally with the turbine blade, a rotating shaft that is coupled to the turbine blade at one end and the compressor blade to the other end. Have Compressed air is supplied to the engine by the rotation of the compressor blades.

  Before the turbocharger is shipped as a product, the rotational balance is corrected. The rotation balance is corrected by at least partially removing a removal target portion (for example, a fixed object such as a nut fixed to the rotation shaft) that is a portion that rotates integrally with the rotation shaft on the turbine blade side or the compressor side. To do. The removal processing position and the removal processing amount in the removal target portion are determined based on data obtained by measuring the rotational unbalance amount and the like while the supercharger is rotated at a high speed. Such a rotation balance correction of the supercharger is described in Patent Documents 1 and 2 below, for example.

In the removal process, the boss of the rotating shaft (portion protruding in the axial direction) is supported on the turbine blade side or the compressor blade side, and the removal target portion is removed on the opposite side (compressor blade side or turbine blade side). I was processing. Therefore, during the removal process, the rotating shaft is cantilevered such that it is supported on the turbine blade side or the compressor blade side where the removal process is not performed.
JP 2002-39904 A JP-A-2005-207805

  In the conventional removal processing, since the rotating shaft is cantilevered as described above, there is a problem that the removal processing cannot be performed with high accuracy. That is, the rotating shaft of the supercharger is supported by a bearing incorporated in the supercharger, but there is a certain amount of play (backlash) between the bearing and the rotating shaft. The axis of rotation will be shifted by the amount of play. Moreover, the said play has an individual difference for every supercharger. Therefore, the amount of removal processing cannot be strictly controlled, and high-precision removal processing cannot be performed. As a result, the number of times of removal processing is increased, and there is a possibility that the production tact of the supercharger will be significantly deteriorated.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a balance correction device that can perform high-accuracy balance correction processing on rotating machines such as a turbocharger, a turbo compressor, and a gas turbine.

In order to achieve the above object, according to the present invention, there is provided a balance correction apparatus for correcting a rotational balance of a rotating machine by at least partially removing a portion to be removed that is a part that rotates integrally with a rotating shaft of the rotating machine. There,
A fixing device capable of fixing the rotating shaft so as not to rotate in the rotating direction on one end side of the rotating shaft of the rotating machine;
A slip prevention device that holds the other end of the rotating shaft and prevents the other end from shifting in the radial direction of the rotating shaft;
With the fixing device fixing the rotating shaft in the rotating direction on one end side of the rotating shaft, the displacement prevention device holds the other end of the rotating shaft and removes it from the removal target portion. A processing device for processing ,
The rotating machine is provided with a bearing that supports the rotating shaft in the radial direction,
When performing the removal processing, both end portions of the rotating shaft are supported by the fixing device and the deviation preventing device, respectively, whereby the rotating shaft is in a state of floating from the bearing. A characteristic balance correction device is provided.

In the balance correcting device of the present invention, the fixing device fixes the rotating shaft in the rotating direction on one end side of the rotating shaft, and the misalignment preventing device holds the other end of the rotating shaft. Since the processing device performs removal processing on the removal target portion in a state where the end portion is prevented from being displaced in the radial direction of the rotation shaft, the rotation shaft moves in the radial direction and the rotation direction during the removal processing. It can prevent shifting. Thereby, highly accurate balance correction processing can be performed.
As a result, the number of removal processes can be greatly reduced, and the production tact of the rotating machine can be greatly reduced when the balance of the rotating machine is corrected before shipment.

In the above configuration, when the removal process is performed, both ends of the rotating shaft are supported by the fixing device and the deviation preventing device, respectively, so that the rotating shaft is lifted from the bearing of the rotating machine. Therefore, highly accurate balance correction processing can be performed without being affected by individual differences for each rotating machine such as play between the rotating shaft and the bearing.
As a result, the number of removal processes can be further reduced, and the production tact of the rotary machine can be further reduced when the balance of the rotary machine is corrected before shipment.

  According to a preferred embodiment of the present invention, the fixing device has a collet chuck mechanism.

  In the above configuration, by using a collet chuck mechanism as means for fixing the rotating shaft in the rotating direction, the rotating shaft can be fixed in the rotating direction without any play in the rotating direction. Thereby, it can prevent reliably that a rotating shaft slip | deviates to a rotation direction during a removal process.

According to a preferred embodiment of the present invention, the other end portion of the rotating shaft is formed with a holding hole opened in the axial direction of the rotating shaft,
The slip prevention device has an insertion portion that is inserted into the holding hole in the axial direction.

  Thus, the other end portion of the rotating shaft is formed with a holding hole that opens in the axial direction of the rotating shaft, and the slip prevention device is inserted into the holding hole in the axial direction. Since it has an insertion part, it can prevent that a rotating shaft shifts | deviates to the radial direction during removal processing by inserting and inserting an insertion part in a holding hole.

According to a preferred embodiment of the present invention, the processing apparatus includes a processing tool that removes the removal target part, a movable part to which the processing tool is attached, and a drive device that moves the movable part,
The insertion part is attached to the movable part;
When the movable part moves to a predetermined processing position where the processing tool removes the removal target part, the insertion part is positioned at a position where the insertion part is inserted into the holding hole. A relative position between the processing tool and the insertion portion in the movable portion is set.

  In the above configuration, when the insertion unit is attached to the movable part to which the processing tool is attached, and the movable part moves to a predetermined processing position where the processing tool removes the removal target part, the insertion part is The relative position between the processing tool and the insertion part in the movable part is set so that the insertion part is located at the position inserted into the holding hole. Therefore, the processing tool can be arranged so that the removal target portion can be removed by moving the movable portion to the processing position, and the insertion portion can be inserted into the holding hole. In addition, since it is not necessary to provide a separate drive device for moving the insertion portion, the balance correction device can be reduced in size.

According to a preferred embodiment of the present invention, the slip prevention device has a pressing device that is provided in the movable portion and presses the insertion portion toward the rotating shaft,
In a state where the movable portion moves in the axial direction of the rotation shaft and the insertion portion is inserted into the holding hole, the pressing device presses the insertion portion toward the rotation shaft.

  In the above configuration, in a state where the movable portion moves in the axial direction of the rotation shaft and the insertion portion is inserted into the holding hole, the pressing device presses the insertion portion toward the rotation shaft. ing. Thereby, it can prevent that it remove | deviates from the hole for holding | maintenance of an insertion part during a removal process.

  According to the balance correction apparatus of the present invention described above, highly accurate balance correction processing can be performed.

  The best mode for carrying out the present invention will be described with reference to the drawings. In addition, the same code | symbol is attached | subjected to the common part in each figure, and the overlapping description is abbreviate | omitted.

FIG. 1 is a schematic configuration diagram of a balance correction apparatus 10 for a rotary machine according to an embodiment of the present invention. In the example of FIG. 1, the rotating machine is a supercharger. 1, reference numeral 3 indicates a turbine blade of a turbocharger that is rotationally driven by engine exhaust gas, reference numeral 5 indicates a compressor blade that rotates integrally with the turbine blade 3, and reference numeral 7 indicates one end. The reference numeral 8 represents a rotating shaft to which the turbine blade 3 is coupled and the compressor blade 5 is coupled to the other end. Reference numeral 8 represents a turbine housing, and reference numeral 17 represents a bearing housing. In FIG. 1, the supercharger is installed on the base 27.
As shown in FIG. 1, the balance correction device 10 is a device that corrects the rotation balance of a rotating body part that is assembled in a state in which the rotating shaft 7, the turbine blade 3, and the compressor blade 5 are integrally rotatable. In order to correct the rotational balance, the balance correction device 10 at least partially removes the removal target portion 1 that is a portion that rotates integrally with the rotary shaft 7 of the supercharger. The balance correction device 10 includes a fixing device 9, a deviation prevention device 11, and a processing device 13.

  The fixing device 9 can support the rotating shaft 7 on one end side of the rotating shaft 7 of the supercharger and can fix the rotating shaft 7 so as not to rotate in the rotating direction. The slip prevention device 11 supports the rotating shaft 7 by holding the other end 7 a of the rotating shaft 7 and prevents the other end 7 a from shifting in the radial direction of the rotating shaft 7. The processing device 13 rotates in a state where the fixing device 9 fixes the rotating shaft 7 on one end side of the rotating shaft 7 in the rotating direction and the deviation preventing device 11 holds the other end portion 7 a of the rotating shaft 7. Removal processing is performed on the other end portion 7 a of the shaft 7.

  The supercharger is provided with a bearing 15 that supports the rotary shaft 7 in the radial direction. The bearing 15 is fixed to a bearing housing 17 of the supercharger. When performing the removal process, both ends of the rotating shaft 7 are supported by the fixing device 9 and the deviation preventing device 11, respectively, so that the rotating shaft 7 is in a state of floating from the bearing 15.

  The configuration of the balance correction device 10 will be described in detail.

The fixing device 9 includes a collet chuck mechanism 19 that fixes the rotating shaft 7 in the rotation direction. FIG. 2 shows the collet chuck mechanism 19. FIG. 2 is an enlarged view of a portion surrounded by a broken line in FIG. As shown in FIG. 2, the collet chuck mechanism 19 includes a collet chuck 19a, a fixed shaft 19b, and a clamp member 19c. The collet chuck 19a has a plurality of collet claws 21 arranged with gaps in the circumferential direction. Each collet claw 21 is arranged to be inclined from the axial direction of the collet chuck 19a or the rotating shaft 7 (left and right direction in FIG. 1 and FIG. 2), and each collet claw 21 has a tip portion (right end portion in FIG. 2). It is closer to the central axis A of the collet chuck 19a than the rear end (left end in FIG. 2). The plurality of collet claws 21 are integrally coupled at the rear end. The rear end portion of the collet chuck 19a is fixed to the tip end portion (the right end portion in FIG. 2) of the fixed shaft 19b, whereby the collet chuck 19a is supported by the fixed shaft 19b. The clamp member 19c is a cylindrical member and is fitted to the collet chuck 19a and the fixed shaft 19b. The clamp member 19c is movable in the axial direction of the fixed shaft 19b and the collet chuck 19a. By moving the clamp member 19c rearward in the axial direction (left direction in FIGS. 1 and 2), the inner surface of the clamp member 19c presses each collet claw 21 radially inward of the clamp member 19c. Thereby, the rotating shaft 7 is fixed in the rotation direction. That is, each collet claw 21 bends inward in the radial direction and firmly grips the gripped portion 7b (in this example, one end portion of the rotary shaft 7) of the rotary shaft 7 inserted in the internal space of the collet chuck 19a. .
The gripped portion 7b of the rotating shaft 7 is shown in FIGS. 3 is a view taken along the line III-III in FIG. Preferably, as shown in FIG. 3, a plurality of protrusions 23 that are inserted into the gaps between the plurality of collet claws 21 are formed in the circumferential direction in the gripped portion 7 b of the rotating shaft 7. Thereby, the rotating shaft 7 can be more firmly fixed in the rotation direction.
The fixing of the rotary shaft 7 by the collet chuck mechanism 19 does not cause play in the rotation direction (circumferential direction) of the rotary shaft 7 between the rotary shaft 7 and the collet chuck mechanism 19, and will be described later. It is possible to reliably prevent the rotation shaft 7 from shifting in the rotation direction during processing.

The processing device 13 is shown in more detail in FIG. 4A is a view taken along the line AA in FIG. 1, and FIG. 4B is a view taken along the line BB in FIG. 4A. As shown in FIG. 4A, the processing apparatus 13 includes a processing tool (end mill in the example of FIG. 4A) 13a for removing the removal target portion 1 of the other end 7a, and the processing tool 13a. It has a movable part 13b to be attached and a drive device 13c that moves the movable part 13b. In addition to the processing tool 13a, an insertion portion 11a (which will be described in detail later) of the shift prevention device 11 is attached to the movable portion 13b. When the movable portion 13b moves to a predetermined processing position where the processing tool 13a removes the removal target portion 1, the movable portion 13b is inserted so that the insertion portion 11a is inserted into the holding hole 7c (described in detail later). The relative position between the processing tool 13a and the insertion portion 11a is set. In FIG. 4A, the holding hole 7c is seen through. 4C shows a state where the movable portion 13b of the processing device 13 is moved from the state of FIG. 4A and the insertion portion 11a of the deviation preventing device 11 is inserted into the holding hole 7c of the rotating shaft 7. FIG. ing. Therefore, as shown in FIG. 4C, in the state where the driving device 13c moves the movable portion 13b and the position of the processing tool 13a becomes the position where the removal target portion 1 is removed, the position of the insertion portion 11a is It is a position where it is inserted into the holding hole 7c so that its center coincides with the holding hole 7c. In other words, in a state where the center axis C1 of the insertion portion 11a is inserted into the holding hole 7c so as to coincide with the center axis C2 of the holding hole 7c, the position of the processing tool 13a removes the removal target portion 1. It is the position to process.
FIG. 5 is a view taken along the line VV in FIG. 1 and shows the removal target portion 1. In the example of FIGS. 1 and 5, the removal target portion 1 is a nut fixed to the other end portion 7 a of the rotating shaft 7.
The drive device 13c uses, for example, a servo motor to move the movable portion 13b in one axial direction (axial direction of the rotary shaft 7), two axial directions (two horizontal directions including the axial direction of the rotary shaft 7) or three axes. It is a device that moves in directions (two horizontal directions and a vertical direction perpendicular to each other). FIG. 1 shows a case of three axis directions. 1 and 4, the driving device 13c includes a first driving unit 24 that moves the movable unit 13b in the first horizontal direction (the left-right direction in FIG. 4, that is, the axial direction of the rotating shaft 7), and the movable unit 13b. Is moved in a second horizontal direction perpendicular to the first horizontal direction (direction perpendicular to the paper surface of FIG. 1), and the movable portion 13b is moved vertically (up and down in FIG. 1). And a third drive unit 26 (see FIG. 1). Each drive part 24, 25, 26 moves the movable part 13b using a servomotor. For example, the movable unit 13b may be installed in the first drive unit 24, the first drive unit 24 may be installed in the second drive unit 25, and the second drive unit 25 may be installed in the third drive. The third driving unit 26 may be installed on the base 27.

As shown in FIG. 4, the deviation preventing device 11 has an insertion portion 11 a that is inserted in the holding hole 7 c of the rotating shaft 7 in the axial direction. That is, the insertion portion 11a is fitted into the holding hole 7c without a gap (play) in the radial direction of the inner surface of the holding hole 7c and the rotary shaft 7. The holding hole 7c opens in the axial direction of the rotating shaft 7 at the tip of the rotating shaft 7, and its cross-sectional shape is tapered. Further, the distal end portion (left end portion in FIG. 4) of the insertion portion 11a has the same shape as the shape of the holding hole 7c. That is, the distal end portion of the insertion portion 11a is tapered in cross section so as to match the shape of the holding hole 7c. Accordingly, when the movable portion 13b is moved in the axial direction of the rotary shaft 7 (the direction from right to left in FIG. 4) and the insertion portion 11a is inserted into the holding hole 7c, the insertion is performed with the central axis C2 of the holding hole 7c. Even if the center axis C1 of the portion 11a is slightly deviated, after the insertion portion 11a is inserted into the holding hole 7c, the center axis C2 of the holding hole 7c and the center axis C1 of the insertion portion 11a coincide with each other. can do. At this time, the movable portion 13b is movable in a direction perpendicular to the axial direction of the rotating shaft 7.
The slip prevention device 11 includes a pressing device 11b that is provided on the movable portion 13b and presses the insertion portion 11a toward the rotation shaft 7. In this example, in a state where the movable portion 13b moves in the axial direction of the rotation shaft 7 and the insertion portion 11a is inserted into the holding hole 7c, the pressing device 11b presses the insertion portion 11a toward the rotation shaft 7. ing. Therefore, at this time, the insertion portion 11a is fitted in the holding hole 7c without any gap in the radial direction of the holding hole 7c and the rotation shaft 7, so that the insertion portion 11a can be connected to the other of the rotation shaft 7. The end portion 7 a is prevented from being displaced in the radial direction of the rotating shaft 7.
In the example of FIGS. 1 and 4, the pressing device 11b is a pneumatic cylinder device. In this case, the insertion portion 11a functions as a piston of the pneumatic cylinder device 11b. The operation of the pneumatic cylinder device 11b will be described. When the movable portion 13b is moved in the axial direction of the rotary shaft 7 toward the machining position by the driving device 13c, the movable portion 13b reaches before the machining position. The insertion portion 11a is inserted into the holding hole 7c and hits the rotating shaft 7, and the movable portion 13b moves forward in the axial direction (moving from the left side to the right side in FIG. 4), so that the pneumatic cylinder device 11b is compressed. And by that compression. The pneumatic cylinder device 11b presses the insertion portion 11a toward the holding hole 7c, and in this state, the movable portion 13b reaches the processing position. Therefore, in a state where the insertion portion 11a is inserted into the holding hole 7c, the pneumatic cylinder device 11b presses the insertion portion 11a against the rotating shaft 7. In addition, the code | symbol 29 of FIG. 1 shows the pneumatic pressure source which supplies pneumatic pressure to the cylinder chamber 31 of the pneumatic cylinder apparatus 11b.

A position adjustment mechanism 33 that adjusts the relative position between the insertion portion 11a and the processing tool 13a in the movable portion 13b may be provided. The adjustment of the relative position is performed in a horizontal direction orthogonal to the axial direction of the rotating shaft 7 (in this example, a direction orthogonal to the paper surface of FIG. 1). The position adjusting mechanism 33 may be as shown in FIG. FIG. 6A corresponds to FIG. 4A, but shows a case where the position adjusting mechanism 33 is provided. FIG. 6B is a view taken along line BB in FIG. The position adjusting mechanism 33 includes a mounting member 35, bolts 36 and 37, and bolt support portions 38 and 39. The insertion portion 11a is attached and fixed to the attachment member 35. The attachment member 35 is supported on the upper surface of the movable portion 13b so as to be slidable along the upper surface of the movable portion 13b. The bolt 36 is supported by a bolt support member 38. Specifically, a through hole 38 a is provided in the bolt support portion 38, and a female screw that engages with a male screw formed in the bolt 36 is formed in the through hole 38 a. The bolt support member 38 is fixed to the movable portion 13b. The configurations of the bolt 37 and the bolt support member 39 are the same as the configurations of the bolt 36 and the bolt support member 38. As shown in FIG. 6A, the bolt 36 and the bolt support portion 38, the bolt 37 and the bolt support portion 39 are provided on both sides of the attachment member 35, respectively.
By rotating the bolt 36 in the advancing direction, the attachment member 35 is pushed by the bolt 36 and moved downward in FIG. At this time, the bolt 37 is rotated and retracted. Thereafter, the bolt 37 is rotated in the forward direction, and the attachment member 35 is sandwiched between the bolt 36 and the bolt 37. Thereby, the position of the attachment member 35 in the horizontal direction (vertical direction in FIG. 6A) orthogonal to the axial direction of the rotating shaft 7 is adjusted and fixed.
In FIG. 6, the insertion portion 11 a and the mounting member 35 are separated from the piston 49 of the pneumatic cylinder device 11 b, and the mounting member 35 is pressed by the piston 49 toward the rotating shaft 7 in the axial direction of the rotating shaft 7. Is done.

As shown in FIG. 1, the balance correction device 10 includes a fixed shaft moving device 41, a rotational position adjusting device 43, a fixing mechanism 45, and a presser mechanism 47.
The fixed shaft moving device 41 includes a stage 41 a that supports the fixed shaft 19 b and a drive unit 41 b that moves the stage 41 a in the axial direction of the rotary shaft 7. The stage 41a supports the fixed shaft 19b in the vertical direction by a support member 47b and a support member 48b attached to the stage 41a. The drive unit 41b may use a servo motor. When the stage 41a moves in the axial direction, the support member 47b or the support member 48b fixed to the stage 41a pushes the supported portion 47a or the supported member 48a fixed to the fixed shaft 19b in the axial direction. The fixed shaft 19b is moved in the axial direction.
The rotational position adjusting device 43 rotates the removal target portion 1 around the center of the rotation shaft 7. In the example of FIG. 1, the rotational position adjusting device 43 is fixed to the servo motor 43a, the speed reducer 43b that decelerates the rotation of the servo motor 43a and outputs the rotational driving force of the servo motor 43a, and the output shaft of the speed reducer 43b. And a position adjustment gear 43d fixed to the fixed shaft 19b of the meshing and fixing device 9 with the gear 43c. The rotational position adjusting device 43 adjusts the rotational position of the fixed shaft 19b in a state where the collet chuck mechanism 19 firmly holds the rotational shaft 7. Thereby, the rotational position of the removal object part 1 is adjusted.
The fixing mechanism 45 prevents the fixed shaft 19b from rotating when the processing tool 13a is removing the removal target portion 1 after the rotational position adjusting device 43 has adjusted the rotation position of the removal target portion 1. The fixed shaft 19b is fixed in the rotational direction. For example, the fixing mechanism 45 includes a flange portion 45a that is fixed to the fixed shaft 19b and protrudes from the fixed shaft 19b in the radial direction of the fixed shaft 19b, and a clamp device 45b that firmly holds the flange portion 45a in the axial direction of the fixed shaft 19b. It may have. The clamp device 45b is fixed to the stage 41a, and its fixing position can be adjusted by appropriate means.
The presser mechanism 47 supports the fixed shaft 19b in the axial direction so that the fixed shaft 19b does not move rearward in the axial direction (leftward in FIG. 1) when the processing tool 13a is removing the removal target portion 1. That is, the presser mechanism 47 supports the fixed shaft 19b in the axial direction against the force with which the pressing device 11b presses the fixed shaft 19b via the rotating shaft 7. For example, the holding mechanism 47 is fixed to the fixed shaft 19b and protrudes from the fixed shaft 19b in the radial direction of the fixed shaft 19b, and the supported portion 47a from the rear side in the axial direction (left side in FIG. 1). The supporting member 47b may be in contact with the supporting member 47b to prevent the supported portion 47a from moving rearward in the axial direction.

According to the balance correction apparatus 10 of the above-described embodiment, the following effects can be obtained.
(1) The fixing device 9 fixes the rotating shaft 7 in the rotating direction on one end side of the rotating shaft 7, and the deviation preventing device 11 holds the other end portion 7 a of the rotating shaft 7, and the other end portion 7 a rotates. Since the processing device 13 performs the removal processing on the removal target portion 1 while preventing the shaft 7 from shifting in the radial direction, the rotational shaft 7 is shifted in the radial direction and the rotation direction during the removal processing. Can be prevented. Thereby, highly accurate balance correction processing can be performed. As a result, the number of removal processes can be greatly reduced, and the production cycle of the turbocharger can be greatly reduced.
(2) In the above configuration, when the removal process is performed, both end portions of the rotating shaft 7 are supported by the fixing device 9 and the slip prevention device 11, respectively, so that the rotating shaft 7 is a bearing 15 of the supercharger. Therefore, the balance correction process can be performed with high accuracy without being affected by individual differences between the turbochargers such as play between the rotating shaft 7 and the bearing 15. As a result, the number of removal processes can be further reduced, and the production cycle of the supercharger can be further reduced.
(3) By using the collet chuck mechanism 19 as means for fixing the rotating shaft 7 in the rotating direction, the rotating shaft 7 can be fixed in the rotating direction without any play in the rotating direction. Thereby, it can prevent reliably that the rotating shaft 7 slip | deviates to a rotation direction during removal processing.
(4) When the insertion portion 11a is attached to the movable portion 13b to which the processing tool 13a is attached and the movable portion 13b moves to a predetermined processing position where the processing tool 13a removes the removal target portion 1, the insertion portion 11a The relative position between the processing tool 13a and the insertion portion 11a in the movable portion 13b is set so that the position is the position inserted into the holding hole 7c. Therefore, the processing tool 13a can be arranged so that the other end portion 7a of the rotating shaft 7 can be removed by moving the movable portion 13b to the processing position, and the insertion portion 11a can be inserted into the holding hole 7c. it can. Further, since it is not necessary to separately provide the drive device 13c for moving the insertion portion 11a, the balance correction device 10 can be reduced in size.
(5) In a state where the movable portion 13b moves in the axial direction of the rotation shaft 7 and the insertion portion 11a is inserted into the holding hole 7c, the pressing device 11b presses the insertion portion 11a toward the rotation shaft 7. Yes. Thereby, it can prevent removing from the holding hole 7c of the insertion part 11a during a removal process.

  The present invention is not limited to the above-described embodiment, and various changes can be made without departing from the scope of the present invention.

  For example, although the pressing device 11b is a pneumatic cylinder in FIG. 1, another appropriate device that presses the insertion portion 11a toward the rotating shaft 7 may be used as the pressing device.

Further, the deviation prevention device 11, the insertion portion 11a, and the pressing device 11b may be installed on the base 27 instead of the movable portion 13b.
In the above-described embodiment, the deviation prevention device 11 is configured to move along the axial direction with respect to the base 27 integrally with the processing tool 13a by the movement of the movable portion 13b. You may provide the drive mechanism for the slip prevention apparatus etc. which are moved with respect to the base 27 independently of the tool 13a.

  As an example of the rotation position adjusting device 43, the following device can be used. This device rotates the rotary shaft 7 by rotationally driving the insertion portion 11a inserted and fitted into the holding hole 7c. Therefore, the holding hole 7c and the insertion portion 11a engage not only in the radial direction of the rotating shaft 7 but also in the rotating direction of the rotating shaft 7. For example, the insertion portion 11a has the same shape as a hexagon wrench, and the holding hole 7c has the same hexagonal cross section as the hexagon wrench. In this way, the above-mentioned movable portion 13b is provided with a drive mechanism that rotationally drives the insertion portion 11a engaged in the rotation direction of the rotary shaft 7 in the holding hole 7c. The drive mechanism includes a servo motor, a speed reducer that reduces the rotation of the servo motor, a gear that is fixed to the output shaft of the speed reducer, and a position adjustment gear that meshes with the gear and is fixed to the insertion portion 11a. . In this case, the insertion part 11a is rotatable in the rotation direction of the insertion part 11a. For example, the insertion portion 11a can rotate integrally with the piston of the pneumatic cylinder device 11b.

  In the above-described embodiment, the removal target portion 1 is a nut fixed to the other end portion 7a of the rotating shaft 7, but the present invention is not limited to this. That is, the removal target portion 1 may be a portion that rotates integrally with the rotating shaft of the rotating machine, and is a fixed object (for example, the other end of the rotating shaft 7 of the supercharger) that is fixed to the rotating shaft of the rotating machine. A cylindrical member fixed to 7a) or a part of the rotating shaft of the rotating machine.

  Moreover, the balance correction apparatus of this invention is applicable also to other rotating machines, such as a turbo compressor and a gas turbine, besides a supercharger. That is, the balance correcting device of the present invention can be applied to any rotating machine that corrects the rotational balance.

It is a block diagram of the balance correction apparatus by embodiment of this invention. It is an enlarged view of the part enclosed with the broken line of FIG. It is the III-III arrow directional view of FIG. 4A is a view taken along the line AA in FIG. 1, FIG. 4B is a view taken along the line BB in FIG. 4A, and FIG. The state which inserted the insertion part in the holding hole from the state of A) is shown. It is the VV arrow directional view of FIG. FIG. 6 (A) corresponds to FIG. 4 (A) but shows a case where a position adjusting mechanism is provided, and FIG. 6 (B) is a view taken along line BB in FIG. 6 (A).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Removal target part, 3 ... Turbine blade, 5 ... Compressor blade, 7 ... Rotating shaft, 7a ... Other end part, 7b ... Grasped part, 7c ... Holding 8 ... Turbine housing, 9 ... Fixing device, 10 ... Balance correction device, 11 ... Deviation prevention device, 11a ... Insertion part, 11b ... Pressing device (Pneumatic cylinder) Device), 13 ... processing device, 13a ... processing tool, 13b ... movable part, 13c ... drive device, 15 ... bearing, 17 ... bearing housing, 19 ... collet chuck Mechanism: 19a ... Collet chuck, 19b ... Fixed shaft, 19c ... Clamp member, 21 ... Collet claw, 23 ... Projection part, 24 ... First drive part, 25 ... Second drive unit, 26 ... third drive unit, 27 ... base, 29 ..Pneumatic source (air cylinder), 31 ... cylinder chamber, 33 ... position adjusting mechanism, 35 ... mounting member, 36, 37 ... bolt, 38, 39 ... bolt support member, DESCRIPTION OF SYMBOLS 41 ... Fixed axis moving device, 41a ... Stage, 41b ... Drive part, 43 ... Rotation position adjusting device, 43a ... Servo motor, 43b ... Reducer, 43c ... Gear 43d: Position adjusting gear, 45 ... Fixing mechanism, 45a ... Flange, 45b ... Clamping device, 47 ... Holding mechanism, 47a ... Supported part, 47b ... Support 48a ... supported part, 48b ... support member, 49 ... piston

Claims (5)

A balance correcting device that corrects the rotational balance of the rotating machine by at least partially removing a removal target part that is a part that rotates integrally with the rotating shaft of the rotating machine,
A fixing device capable of fixing the rotating shaft so as not to rotate in the rotating direction on one end side of the rotating shaft of the rotating machine;
A slip prevention device that holds the other end of the rotating shaft and prevents the other end from shifting in the radial direction of the rotating shaft;
With the fixing device fixing the rotating shaft in the rotating direction on one end side of the rotating shaft, the displacement prevention device holds the other end of the rotating shaft and removes it from the removal target portion. A processing device for processing ,
The rotating machine is provided with a bearing that supports the rotating shaft in the radial direction,
When performing the removal processing, both end portions of the rotating shaft are supported by the fixing device and the deviation preventing device, respectively, whereby the rotating shaft is in a state of floating from the bearing. A characteristic balance correction device. The balance correction device according to claim 1 , wherein the fixing device has a collet chuck mechanism. A holding hole that opens in the axial direction of the rotating shaft is formed at the other end of the rotating shaft,
The anti-displacement device has an insertion portion to be inserted axially into the holding hole, balance corrector according to claim 1 or 2, characterized in that. The processing apparatus includes a processing tool for removing the removal target part, a movable part to which the processing tool is attached, and a driving device for moving the movable part,
The insertion part is attached to the movable part;
When the movable part moves to a predetermined processing position where the processing tool removes the removal target part, the insertion part is positioned at a position where the insertion part is inserted into the holding hole. The balance correction apparatus according to claim 3 , wherein a relative position between the processing tool and the insertion portion in the movable portion is set. The slip prevention device has a pressing device that presses the insertion portion toward the rotating shaft,
In a state where the movable portion moves in the axial direction of the rotation shaft and the insertion portion is inserted into the holding hole, the pressing device presses the insertion portion toward the rotation shaft. The balance correction apparatus according to claim 3 or 4 , characterized by the above-mentioned.

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