JP5652598B2 - Rotating body gripping device - Google Patents

Description

  The present invention relates to a rotating body gripping device that grips a rotating body so that the rotating body does not rotate when the rotating body is partially removed to correct an imbalance existing in the rotating body of a rotating machine.

FIG. 1 shows a configuration of an apparatus that measures unbalance of a rotating body and performs removal processing for unbalance correction.
The apparatus includes a support 53, an acceleration sensor 57, a rotation angle sensor 59, a gripping device 61, and a processing device 63.
The support 53 supports the rotating body 65 in a rotatable manner. In the example of FIG. 1, a bearing housing 54 incorporating a radial bearing 54 a that rotatably supports a rotating body 65 is attached to the support 53. Thereby, the support body 53 supports the rotary body 65 through the bearing housing 54 so that rotation is possible.
The acceleration sensor 57 is attached to the support 53 and detects acceleration (vibration) generated in the support 53.
The rotation angle sensor 59 detects a rotation angle indicating the amount of rotation of the rotating body 65 from the initial state.
The processing device 63 removes the unbalance by partially cutting the rotating body 65 at the circumferential position where the unbalance exists.

  In FIG. 1, the rotating body 65 has a wing structure portion 65a. The blade structure portion 65a is provided with a turbine blade 67 that is rotationally driven by a driving gas. The turbine blade 67 is accommodated in the turbine housing 68. The turbine housing 68 is formed with a guide flow path 68a for guiding the drive gas to the turbine blades 67 and a discharge flow path 68b for discharging the drive gas that rotationally drives the turbine blades 67 to the outside.

  At the time of unbalance measurement, the turbine blade 67 and the rotating body 65 are rotationally driven by supplying the driving gas to the turbine blade 67 through the guide channel 68a. In this state, the rotation angle sensor 59 detects the rotation angle of the rotating body 65 while the acceleration sensor 57 detects the vibration generated in the support body 53. Based on the detected vibration and rotation angle, the circumferential position and size of the unbalance existing in the rotating body 65 are calculated.

  At the time of removal processing, the gripping device 61 extends through the insertion hole 53a formed in the support 53 to the wing structure portion 65a side as shown by the broken line in FIG. 1 so that the rotator 65 does not rotate. In this state, the rotating body 65 is partially cut by the processing device 63 by an amount corresponding to the magnitude of the unbalance at the measured circumferential position of the unbalance. Thereby, the unbalance of the rotating body 65 is removed. The insertion hole 53a is closed by an appropriate means at the time of imbalance measurement.

The above-described method for measuring and correcting unbalance is described, for example, in Patent Document 1 below.

JP 2009-244187 A

  However, the configuration described above has the following problems.

  A discharge hole 53 b that receives driving gas from the discharge flow path 68 b is formed in the support 53. In order to arrange the gripping device 61 at a position facing the blade structure 65a in the axial direction, the discharge hole 53b extends from the rotor blade (turbine blade 67) to the rear in the axial direction (left direction in FIG. 1) and then immediately has a radius. Turning in the direction (upward in FIG. 1), the driving gas is guided in the radial direction to another exhaust duct (not shown). Thus, since the discharge hole 53b is bent suddenly from the axial direction to the radial direction, the pressure of the driving gas becomes too high. As a result, the rotational speed of the rotating body 65 cannot be increased to a specified speed, and a thrust force acts on the rotating body 65 in the direction of arrow A in FIG. 1, resulting in an excessive load on the rotating machine. If the load is excessive, abnormal vibration may occur, and it may be difficult to accurately measure the unbalance amount.

  Therefore, an object of the present invention is to suppress the boosting of the driving gas that rotationally drives the rotor blades of the blade structure part during unbalance measurement, and to hold the blade structure part and prevent the rotating body from rotating during removal processing. An object of the present invention is to provide an apparatus that can be configured as described above.

In order to achieve the above object, according to the present invention, when the rotary body is partially removed to correct an imbalance existing in the rotary body of a rotating machine, the rotary body is gripped so that the rotary body does not rotate. A rotating body gripping device,
The rotating body has a blade structure portion provided with a rotor blade that is rotationally driven by a driving gas. The blade structure portion is accommodated in a housing, and the driving gas is guided to the rotor blade in the housing. And a discharge flow path for discharging the driving gas that has driven the rotor blade to the outside in the axial direction of the rotating body,
A gripping unit for gripping the wing structure during the removal processing;
An exhaust passage forming body having an exhaust passage through which the driving gas discharged from the discharge passage flows when rotating the rotating body to measure the imbalance of the rotating body;
A driving device that moves the gripping unit and the exhaust flow path forming body to an opposed position that is axially opposed to the wing structure portion, and
The drive device moves the gripping unit to the facing position, so that the gripping unit can grip the wing structure, and moves the exhaust flow path forming body to the facing position to move the gripping unit into the exhaust flow path. There is provided a rotating body gripping device characterized in that the driving gas from the discharge channel flows in the axial direction.

  According to a preferred embodiment of the present invention, the driving device secures a space at the facing position by moving both the gripping device and the exhaust flow path forming body to a position other than the facing position.

According to the above-described present invention, at the time of imbalance measurement, the exhaust flow path forming body is moved by the drive device to a position facing the wing structure portion in the axial direction, so that the drive gas from the discharge flow path is moved in the axial direction. It can flow to the exhaust flow path of the exhaust flow path forming body. Therefore, the range in which the driving gas that rotationally drives the rotor blades can flow in the axial direction can be expanded. Therefore, it is possible to suppress the boosting of the driving gas that rotationally drives the rotor blades.
Further, at the time of removal processing, since the gripping unit is moved to the facing position by the driving device, the wing structure can be gripped by the gripping unit.

An apparatus for measuring and correcting the unbalance of a rotating body is shown. The structure which applied the rotary body holding | grip apparatus by embodiment of this invention to the unbalance measurement correction apparatus is shown. It is an AA arrow simplified view of FIG. The state which moved the rotary body holding | gripping apparatus and the exhaust flow path formation body from the state of FIG. 2, and made the exhaust flow path formation body face the wing | wing structure part in the axial direction is shown. It is an AA arrow simplified view of FIG. The state which moved the rotary body holding | grip apparatus and the exhaust flow path formation body to the position which does not oppose a wing | blade structure part to an axial direction is shown. It is a BB arrow line view of FIG. FIG. 3 is an enlarged view of a portion surrounded by a broken line Lb in FIG. 2. The state which advanced the holding part of the holding unit to the wing | wing structure part side from the state of FIG. 2 is shown.

  A preferred embodiment of 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. 2 shows a case where the rotating body gripping device 10 according to the embodiment of the present invention is applied to the unbalance measurement correction device 20.
The unbalance measurement correction device 20 measures the unbalance of the rotating body 3 and performs a removal process to correct the unbalance.
The rotating body gripping device 10 grips the rotating body 3 so that the rotating body 3 does not rotate when partially removing the rotating body 3 in order to correct the imbalance existing in the rotating body 3 of the rotating machine 5. To do.
In the following, the direction around the central axis C of the rotating body 3 is simply referred to as the circumferential direction, and the direction parallel to the central axis C is simply referred to as the axial direction.

  The rotating body 3 has a blade structure portion 8 provided with a rotor blade 7 that is rotationally driven by a driving gas. The blade structure 8 is accommodated in a housing 15 (in this example, a turbine housing 15). The housing 15 is formed with a guide channel 15a for guiding the driving gas to the rotary blade 7 and a discharge channel 15b for discharging the driving gas driving the rotary blade 7 to the outside in the axial direction. The housing 15 is attached to the inside of a support 13 described later.

  In FIG. 2, the rotary machine 5 is a supercharger. As shown in FIG. 2, the rotating body 3 of the supercharger 5 includes a turbine blade 7 that is rotationally driven by the exhaust gas of the engine, and a compressor blade that supplies compressed air to the engine by rotating integrally with the turbine blade 7. 9 and a rotating shaft 12 provided with a turbine blade 7 (blade structure portion 8) at one end and a compressor blade 9 at the other end.

  The supercharger 5 has a bearing housing 11. A radial bearing portion 11 a that rotatably supports the rotating body 3 is incorporated in the bearing housing 11. The turbocharger 5 is also provided with a compressor housing (removed in FIG. 2) that houses the compressor blades 9 therein.

  In FIG. 2, the bearing housing 11 is attached to a support 13 for balance correction. Thereby, the support body 13 supports the rotary body 3 rotatably via the bearing housing 11.

  The support 13 can supply driving gas for driving the turbine blades 7 to the guide flow path 15 a of the turbine housing 15, and supports the driving gas that has driven the turbine blades 7 through the discharge holes 13 a formed in the support 13. The support body 13 is configured so that it can be discharged to the outside of the body 13.

  The rotating body 3 is provided in the rotating machine 5 and is partially removed to correct the balance. For this purpose, the rotating body 3 includes a removal target portion 17 (a nut 17 in the example in the figure) to be subjected to the removal processing at an axial end portion thereof.

  The rotating body gripping device 10 includes a gripping unit 19, an exhaust flow path forming body 21, and a driving device 23 (see FIG. 3).

  The gripping unit 19 grips the wing structure 8 during the removal process.

  An exhaust passage 21 a is formed in the exhaust passage forming body 21. The exhaust passage 21a allows the driving gas discharged from the discharge passage 15b to flow when the rotating body 3 is rotated in order to measure the imbalance of the rotating body 3.

The driving device 23 moves the gripping unit 19 and the exhaust flow path forming body 21 to the opposed positions that are opposed to the wing structure 8 in the axial direction, mutually exclusively.
2 and 3 show a state in which the gripping unit 19 is in a position facing the wing structure 8 in the axial direction. 3 is an AA arrow view of FIG. 2. In FIG. 3, only a part of the configuration is shown, and the other configurations are not shown. 4 and 5 show a state in which the exhaust flow path forming body 21 is in a position facing the blade structure 8 in the axial direction. FIG. 5 is an AA arrow view of FIG. 4, but in FIG. 5, only a part of the configuration is shown and other configurations are not shown.
The drive device 23 moves the gripping unit 19 to the facing position (the state shown in FIGS. 2 and 3), so that the gripping unit 19 can grip the wing structure portion 8, and the exhaust flow path forming body 21 is By moving to the opposite position (the state shown in FIGS. 4 and 5), the exhaust flow path 21a is aligned axially with the discharge flow path 15b and the discharge hole 13a, and passes through the discharge hole 13a from the discharge flow path 15b. It is designed to accept driving gas. As will be described later, the gripping unit 19 grips the blade structure portion 8 through the discharge hole 13a and the discharge flow path 15b when in the facing position.

The drive device 23 is movable in a cross direction that intersects the axial direction (in the example of FIG. 3, a horizontal direction orthogonal to the axial direction), and a drive that moves the cross direction movable body 23a in the cross direction. Part 23b. The drive unit 23b includes, for example, an air cylinder device that expands and contracts in the intersecting direction and an air pressure supply device that expands and contracts the air cylinder device by supplying air pressure to the air cylinder device. In this case, for example, as shown in FIG. 3, the cylinder 23b1 of the air cylinder device is fixed at a fixed position, and the piston tip 23b2 of the air cylinder device is fixed to the cross direction moving body 23a.
The gripping unit 19 and the exhaust flow path forming body 21 are installed on the cross direction moving body 23a. The installation positions of the gripping unit 19 and the exhaust flow path forming body 21 in the cross direction moving body 23a are shifted from each other in the cross direction.

  As shown in FIG. 6, the drive device 23 moves both the gripping unit 19 and the exhaust flow path forming body 21 to a position other than the facing position by moving the cross direction moving body 23 a in the cross direction. it can. Thereby, a space is secured at the facing position. Therefore, by using this space, a closing member 13d described later can be removed from the main body 13c of the support 13 and the turbine housing 15 can be replaced with another turbine housing 15. When the rotating body 3 attached to the support body 13 is replaced with another type, the turbine housing 15 is replaced in accordance with the size and shape of the blade structure portion 8 of the type of rotating body 3.

  Hereinafter, this embodiment will be described in detail.

  An extraction hole 13b for taking out the turbine housing 15 from the inside of the support body 13 is formed in the support body 13 so as to open in the axial direction on the opposite position side. The support 13 has a closing member 13d that closes the extraction hole 13b. The closing member 13d is detachably attached to the main body 13c of the support 13 with a bolt (not shown) or the like. In the example of FIG. 2, an exhaust port 13a is formed in the closing member 13d. Further, in the example of FIG. 2, the turbine housing 15 is attached to the closing member 13d by, for example, a bolt 18 penetrating the closing member 13d in the axial direction, thereby being attached to the support body 13 via the closing member 13d. .

  The support 13 supports the bearing housing 11 via the reinforcing member 27. In the reinforcing member 27, a through hole (not shown) for passing the wing structure portion 8 penetrates in the left-right direction in FIG. Also, the support 13 has an insertion hole (not shown) for inserting the wing structure 8 into the support 13 from the right side in FIG. Yes. Further, the reinforcing member 27 may be coupled to the support body 13 by a bolt or the like, or may be integrally formed with the support body 13. In the example of FIG. 2, the pressed portion 11 b of the bearing housing 11 is pressed against the reinforcing member 27 by the pressing means 24. The pressing means 24 is, for example, a hydraulic clamp. In this case, a clamp rod 24a (for example, a swing type clamp rod) of the hydraulic clamp 24 presses the pressed portion 11b of the bearing housing 11 against the reinforcing member 27 in the axial direction. The bearing housing 11 is supported by the support 13 via the reinforcing member 27. The main body 24 b of the hydraulic clamp 24 having the hydraulic chamber therein may be fixed to the support body 13. A plurality of such hydraulic clamps 24 may be provided at intervals in the circumferential direction. 7 is a view taken along the line B-B in FIG. 2, and the reinforcing member 27 is in contact with or coupled to the support 13 in the axial direction in a range R surrounded by a broken line in FIG. 7.

  The gripping unit 19 includes a gripping portion 19a that grips the one end portion 3a of the rotating body 3, and a gripping shaft 19b in which the gripping portion 19a is coupled to the tip.

  The gripping part 19a is a collet chuck 19a in this example. FIG. 8 is an enlarged view of a portion surrounded by a broken line Lb in FIG. 2, and shows a collet chuck 19a. The collet chuck 19a has a plurality of collet claws 29 arranged with gaps in the circumferential direction. Each collet claw 29 is inclined from the axial direction (left and right direction in FIG. 8), and each collet claw 29 has a front end portion (right end portion in FIG. 8) at a rear end portion (left end portion in FIG. 8). Is also close to the central axis A of the collet chuck 19a. The plurality of collet claws 29 are integrally coupled at the rear end. The rear end portion of the collet chuck 19a is attached to the tip end portion (the right end portion in FIG. 8) of the grip shaft 19b, whereby the collet chuck 19a is supported by the grip shaft 19b. The gripping unit 19 further includes a clamp member 19c that is a cylindrical member. The clamp member 19c is fitted to the collet chuck 19a and the grip shaft 19b. The clamp member 19c is movable in the axial direction. By moving the clamp member 19c to the rear side in the axial direction (left direction in FIG. 8) by an appropriate means, the inner surface of the clamp member 19c presses each collet claw 29 inward in the radial direction of the clamp member 19c. Thereby, each collet nail | claw 29 bends in the said radial direction inner side, and firmly hold | maintains the one end part 3a of the rotary body 3 inserted in the internal space of the collet chuck 19a.

  The gripping unit 19 further includes an axial direction moving body 19d and a drive unit 19e.

  The axial direction moving body 19d is provided in the cross direction moving body 23a and is movable in the axial direction with respect to the cross direction moving body 23a. The axially moving body 19d is in a forward position (state of FIG. 9) where the grip unit 19 grips the one end 3a of the rotating body 3 in a state where the grip unit 19 is in the facing position (state of FIGS. 2 and 3). And the retracted position retracted from the advanced position (the state shown in FIG. 2). That is, when the gripping unit 19 is in the facing position, the axially moving body 19d moves from the retracted position to the forwardly moved position in the axial direction, so that the gripping part 19a becomes the exhaust port as shown in FIG. 13a and the discharge passage 15b move to the advance position where the one end 3a of the rotating body 3 is gripped.

  The axial moving body 19d reciprocates in the axial direction by being driven by the drive unit 19e. The drive unit 19e includes, for example, an air cylinder device that expands and contracts in the axial direction, and an air pressure supply device that expands and contracts the air cylinder device by supplying air pressure to the air cylinder device. In this case, for example, as shown in FIG. 2, the cylinder 19e1 of the air cylinder device is fixed to the cross direction moving body 23a, and the piston tip 19e2 of the air cylinder device is fixed to the axial direction moving body 19d.

  In relation to the axially moving body 19d, the gripping unit 19 further includes a support member 31, a pressed member 33, a rotation angle adjusting device 35, and a rotation prevention mechanism 37.

  As shown in FIG. 2, the two support members 31 are fixed to the axial moving body 19d with an interval in the axial direction. Each support member 31 supports the gripping shaft 19b so that the gripping shaft 19b can rotate. For this purpose, for example, each support member 31 is formed with a through hole through which the grip shaft 19b penetrates with play.

  The two pressed members 33 are fixed to the grip shaft 19b. One pressed member 33 contacts one support member 31 from one side in the axial direction, and the other pressed member 33 contacts the other support member 31 from the other side in the axial direction. With this configuration, when the axially moving body 19d moves in the axial direction, the axially moving body 19d presses the pressed member 33 in the axial direction via the support member 31, so that the grip shaft 19b moves in the axial direction. It moves in the axial direction together with the body 19d.

  The rotation angle adjusting device 35 adjusts the rotation angle of the grip shaft 19b. The rotation angle adjusting device 35 is installed in the axial direction moving body 19d and moves in the axial direction together with the axial direction moving body 19d. Further, the rotation angle adjusting device 35 rotates the gripping shaft 19b in a state where the gripping portion 19a grips the one end portion 3a of the rotating body 3, thereby rotating the rotating body 3 and adjusting the rotation angle of the rotating body 3. Adjust. In the example of FIG. 2, the rotation angle adjusting device 35 is fixed to the output shaft of the servo motor 35a, the speed reducer 35b that decelerates the rotation of the servo motor 35a and outputs the rotational driving force of the servo motor 35a, and the output shaft of the speed reducer 35b. And a position adjusting gear 35d that meshes with the gear 35c and is fixed to the gripping shaft 19b.

  The rotation prevention mechanism 37 moves the gripping shaft 19b in the circumferential direction so that the gripping portion 19a that grips the rotating body 3 does not rotate when the processing tool 14a is removing the removal target portion 17 of the rotating body 3. Secure to. For example, the rotation prevention mechanism 37 includes a flange portion 37a that is fixed to the grip shaft 19b and protrudes in the radial direction of the grip shaft 19b from the grip shaft 19b, and a clamp device 37b that firmly clamps the flange portion 37a in the axial direction. It may be. The clamp device 37b is fixed to the axially moving body 19d, and the fixing position thereof can be adjusted by appropriate means.

  The unbalance measurement correction device 20 performs unbalance measurement of the rotating body 3. For this purpose, the unbalance measurement correction device 20 includes an acceleration sensor 47, a rotation angle sensor 49, and a calculator 51.

  The acceleration sensor 47 is attached to the support 13. The acceleration sensor 47 detects the acceleration (that is, vibration) of the support 13 while the rotating body 3 is rotating. As described above, the rotating body 3 is rotated by supplying driving gas from the outside of the support body 13 to the guide flow path 15a of the turbine housing 15. Thereby, the turbine blade 7 is rotationally driven by the driving gas, and the rotating body 3 rotates.

At this time, since the exhaust flow path forming body 21 is moved to the facing position by the drive unit 23b, the driving gas that rotationally drives the turbine blades 7 passes through the exhaust hole 13a from the exhaust flow path 15b. It flows into 21a. The driving gas that has flowed into the exhaust passage 21a may flow into a duct (not shown) connected to the opening 21c that is the outlet of the exhaust passage 21a.
Further, when the exhaust flow path forming body 21 is at the facing position, a gap exists between the exhaust flow path forming body 21 and the support 13. As a result, the exhaust flow path forming body 21 does not come into contact with the support 13. Therefore, when the acceleration sensor 47 measures the vibration of the support 13, the exhaust flow path forming body 21 affects the vibration measurement. Never give.
As shown in FIG. 4, the end surface on the support 13 side of the exhaust flow path forming body 21 is formed of a resin material such as Teflon (registered trademark) softer than the constituent material (metal such as iron) of the support 13. It is preferable to attach the coated film 21b. Thereby, when the exhaust flow path forming body 21 is moved in the crossing direction, the support 13 is not damaged even if the coating 21 b contacts the support 13. Further, when the exhaust flow path forming body 21 comes into contact with the support 13 via the coating 21b when in the facing position, since the coating 21b is soft, the coating 21b reduces vibration measurement due to this contact. The driving gas can be sealed while suppressing the influence.

  The rotation angle sensor 49 detects the rotation angle of the rotating body 3. The rotation angle changes from zero degrees to 360 degrees when the rotating body 3 rotates once. The rotation angle sensor 49 is provided in the vicinity of the end of the rotating body 3 on the compressor blade 9 side, but when not in use, the rotation angle sensor 49 is moved to a position where it does not interfere with the processing tool 14a described later by a device not shown.

  The computing unit 51 generates vibration data representing the relationship between the acceleration detected by the acceleration sensor 47 and the rotation angle detected by the rotation angle sensor 49, and from the vibration data, the rotating body 3 using an influence coefficient. Calculate unbalanced data. The unbalance data includes a circumferential position where the unbalance exists in the rotating body 3 and the magnitude of the unbalance. The influence coefficient is acquired in advance. The influence coefficient is calculated on the basis of a change in vibration data (vibration data similar to the above) due to a change in balance caused by, for example, attaching a trial weight to the rotary body 3 and the like.

  The unbalance measurement correction device 20 includes a cutting device 14 that performs removal processing of the rotating body 3. The cutting device 14 includes a processing tool 14a (for example, an end mill) that removes a part of the removal target portion 17 at the other end of the rotating body 3 (in this example, the end on the compressor blade 9 side), and the processing tool 14a. A movable portion 14b to which the tool 14a is attached and a cutting control portion 14c for moving the movable portion 14b are provided. The cutting control unit 14c uses a servo motor, for example, to move the movable unit 14b in the axial direction, biaxial direction (axial direction and horizontal direction orthogonal to the axial direction) or triaxial direction (axial direction, orthogonal to the axial direction). Horizontal and vertical directions).

  The cutting control unit 14c moves the processing tool 14a based on the unbalance data. That is, the cutting control unit 14c is configured so that the unbalance magnitude (= r × m, where r is the distance from the central axis C of the rotating body 3) at the circumferential position where the unbalance exists in the rotating body 3. , M is a mass), and control is performed to move the movable portion 14b in the axial direction so that the processing tool 14a cuts the rotating body 3.

  The procedure of removal processing by the above-described unbalance measurement correction device 20 will be described. First, as described above, in the state where the gripping unit 19 is in the facing position, the axially moving body 19d is moved to the advance position where the gripping unit 19 grips the one end 3a of the rotating body 3. Next, the grip portion 19 a of the grip unit 19 grips the one end portion 3 a of the rotating body 3. Thereafter, as described above, the holding shaft 19b is fixed by the rotation prevention mechanism 37 so as not to rotate. Next, based on the above-mentioned unbalance data, the cutting control unit 14c positions the processing tool 14 at a circumferential position where unbalance exists in the rotating body 3, and in this state, the processing tool 14 is removed. This is moved in the axial direction toward the portion 17 and thereby removed by the magnitude of the unbalance (= r × m, where r is the distance from the axis of the rotating body 3 and m is the mass). The target part 17 is cut. Note that the rotation angle of the rotating body 3 may be adjusted by rotating the grip shaft 19b as described above by the rotation angle adjusting device 35 immediately before cutting.

  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, the following modifications 1 to 3 may be arbitrarily combined or employed alone. In this case, points not described below may be the same as described above, or may be changed as appropriate.

(Modification 1)
The rotating machine 5 does not have to be a supercharger, and may be any one provided with the rotating body 3 having the wing structure portion 8.

(Modification 2)
In the present invention, in order to remove the unbalance of the rotating body 3, a part of the rotating body 3 is removed by a removing process. However, the removing process may be a process other than cutting (for example, laser machining). . In the laser processing, a part of the rotating body 3 is melted and removed.

(Modification 3)
In the above description, the removal process is performed in the axial direction, but the removal process may be performed in the radial direction.

DESCRIPTION OF SYMBOLS 3 Rotating body, 3a One end part, 5 Rotating machine, 7 Rotating blade (turbine blade), 8 wing | blade structure part, 9 Compressor blade, 10 Rotating body holding | grip apparatus, 11 Bearing housing, 11a Radial bearing part, 11b Pressed part, 12 Rotating shaft, 13 support, 13a discharge hole, 13b take-out hole, 13c main body of support, 13d closing member, 14 cutting device, 14a processing tool, 14b movable part, 14c cutting control part, 15 turbine housing, 15a guide channel 15b Discharge flow path, 16 bolt, 17 removal target part, 18 bolt, 19 gripping unit, 19a gripping part (collet chuck), 19b gripping shaft, 19c clamp member, 19d axially moving body, 19e driving part, 19e1 cylinder, 19e2 piston tip, 20 unbalance measurement correction device, 21 exhaust flow path forming body, 21a exhaust Channel, 21b Coating, 21c Opening, 23 Driving device, 23a Cross-direction moving body, 23b Driving unit, 23b1 Cylinder, 23b2 Piston tip, 24 Pressing means, 24a Clamp rod, 24b Hydraulic clamp body, 27 Reinforcement member, 29 Collet claw, 31 support member, 33 pressed member, 35 rotation angle adjusting device, 37 rotation prevention mechanism, 37a flange portion, 37b clamp device, 47 acceleration sensor, 49 rotation angle sensor, 51 computing unit

Claims (3)

A rotating body gripping device for gripping a rotating body so that the rotating body does not rotate when partially removing the rotating body to correct an imbalance existing in the rotating body of a rotating machine,
The rotating body has a blade structure portion provided with a rotor blade that is rotationally driven by a driving gas. The blade structure portion is accommodated in a housing, and the driving gas is guided to the rotor blade in the housing. And a discharge flow path for discharging the driving gas that has driven the rotor blade to the outside in the axial direction of the rotating body,
The housing is attached to a support body, so that the support body rotatably supports the rotating body via the housing,
A gripping unit for gripping the wing structure during the removal processing;
An exhaust passage forming body having an exhaust passage through which the driving gas discharged from the discharge passage flows when rotating the rotating body to measure the imbalance of the rotating body;
A driving device that moves the gripping unit and the exhaust flow path forming body to an opposed position that is axially opposed to the wing structure portion, and
The exhaust flow path forming body is not supported by the support,
The drive device moves the gripping unit to the facing position, so that the gripping unit can grip the wing structure, and moves the exhaust flow path forming body to the facing position to move the gripping unit into the exhaust flow path. The rotating body gripping device is characterized in that the driving gas from the discharge channel flows in the axial direction. The drive device includes a cross direction moving body that is movable in a cross direction that intersects the axial direction, and a drive unit that moves the cross direction moving body in the cross direction.
The gripping unit and the exhaust flow path forming body are installed in the cross direction moving body, and the installation positions of the gripping unit and the exhaust flow path forming body in the cross direction moving body are shifted from each other in the cross direction. The rotating body gripping device according to claim 1. The driving apparatus, both the gripping device and the exhaust passage forming member by moving to a position other than the position opposite to a space to the opposing position, according to claim 1 or 2, characterized in that Rotating body gripping device.