JP6488178B2 - Ultrasonic inspection equipment - Google Patents

Description

  The present disclosure relates to an ultrasonic inspection apparatus.

  For example, since a turbine rotor of a steam turbine in a power plant is operated under a high temperature condition, stress corrosion cracking may occur in a portion subjected to stress when used for a long time. Since this stress acts on the blade implantation part (groove part) of the rotor disk in which the blade root part of the turbine blade is implanted, the blade implantation part is an important part in evaluating the remaining life of the turbine rotor. . However, since the blade root portion of the turbine blade is implanted in this blade implantation portion, it cannot be seen from the surface. Therefore, conventionally, a nondestructive inspection method for stress corrosion cracking using ultrasonic waves has been adopted.

  For example, Patent Document 1 discloses an ultrasonic inspection including a carriage having a rotor shaft traveling magnet roller that travels on the circumferential surface of a rotor shaft and a rotor disk traveling magnet roller that travels on a disk surface of the rotor disk. An apparatus is disclosed. In this ultrasonic inspection apparatus, the carriage is rotated around the turbine rotor while the magnet roller for running the rotor shaft is attracted to the circumferential surface of the rotor shaft and the magnet roller for running the rotor disc is attracted to the disk surface of the rotor disk. The wing implant is inspected by ultrasonic waves while moving in the direction.

Japanese Patent No. 2680130

  In recent years, in order to improve the accuracy of the inspection of the wing implantation part using ultrasonic waves, the size of the probe tends to increase. In a configuration in which a magnet roller for running a rotor disk is attracted to the disk surface of the rotor disk as described in Patent Document 1, in order to stably press a large probe against the disk surface of the rotor disk, for example, the rotor disk It is conceivable to increase the size of the traveling magnet roller.

  However, when the magnet roller for running the rotor disk is increased in size, the ultrasonic inspection apparatus itself is increased in size. Therefore, when the interval between the adjacent rotor disks in the axial direction of the rotor shaft is narrow, the gap between the adjacent rotor disks is increased. It is difficult to place an ultrasonic inspection apparatus.

  The present invention has been made in view of the above-described conventional problems, and stably presses the probe against the disk surface of the rotor disk and suppresses the increase in the size of the apparatus configuration in the axial direction of the rotor shaft. It is to provide an ultrasonic inspection apparatus that makes possible.

  (1) An ultrasonic inspection apparatus according to at least one embodiment of the present invention is an ultrasonic inspection apparatus for ultrasonically inspecting a blade implantation portion of a rotor disk in which a blade root portion of a turbine blade is implanted. A probe and a carriage for moving the probe relative to the rotor disk, the carriage comprising a plurality of rotor disk running rollers for running on a disk surface of the rotor disk, and A plurality of rotor shaft traveling rollers for traveling on the circumferential surface of the rotor shaft provided concentrically with the rotor disk, and a holder for holding the probe in a state of facing the disk surface, A first frame extending along the probe and the disk surface; and a second frame extending along the probe and the disk surface. A second frame provided so that the probe is positioned between the first frame and the first frame, and each of the first frame and the second frame includes at least one magnet portion. Have.

  According to the ultrasonic inspection apparatus described in (1) above, the magnet part of the first frame located on one side of the probe facing the disk surface of the rotor disk, and the magnet part of the second frame located on the other side Is sucked to the disk surface side of the rotor disk. For this reason, the probe held by the holder can be stably pressed against the disk surface by the attractive force of the magnet portion generated on both sides of the probe. In addition, the probe is stabilized on the disk surface of the rotor disk by the attractive force of the magnet part of the first frame and the magnet part of the second frame without using a large magnet roller with strong attractive force for the plurality of rotor disk running rollers. Therefore, the enlargement of the ultrasonic inspection apparatus in the axial direction of the rotor shaft can be suppressed.

  (2) In some embodiments, in the ultrasonic inspection apparatus according to (1), the holder extends in the Y direction for guiding the holder in a radial direction of the rotor shaft (hereinafter referred to as a Y direction). At least one guide rail, and each of the plurality of rotor shaft traveling rollers is a magnet roller coupled to a proximal end side of the guide rail.

  According to the ultrasonic inspection apparatus described in (2) above, the ultrasonic inspection apparatus is moved along the circumferential surface of the rotor shaft by the attractive force of the magnet roller connected to the guide rail for guiding the holder in the Y direction. The risk of the ultrasonic inspection device falling from the peripheral surface of the rotor shaft can be reduced.

  (3) In some embodiments, in the ultrasonic inspection apparatus according to (1) or (2), the plurality of rotor disk running rollers are at least one non-magnet roller provided in the first frame. And at least one non-magnet roller provided on the second frame.

  When a magnet roller is employed as the rotor disk running roller, the magnetic powder generated from the magnet roller may enter the bearing portion of the magnet roller and hinder smooth rotation of the roller. On the other hand, in the ultrasonic inspection apparatus described in (1) above, the probe can be stably pressed against the disk surface of the rotor disk by the attractive force of the magnet part of the first frame and the magnet part of the second frame. As described in (3) above, a non-magnet roller can be employed as the rotor disk running roller. As a result, the risk that the rotor disk running roller does not rotate smoothly due to magnetic powder can be reduced, and the life of the ultrasonic inspection apparatus can be increased.

  (4) In some embodiments, in the ultrasonic inspection apparatus according to any one of the above (1) to (3), the first frame has a radial direction of the rotor shaft (hereinafter referred to as a Y direction). And the X direction perpendicular to each of the axial directions of the rotor shaft (hereinafter referred to as the Z direction) and provided on one side with respect to the probe, and extends in the Y direction along the probe. The second frame is provided on the other side of the probe in the X direction and extends in the Y direction along the probe.

  When an oblique probe is used as a probe for the inspection of the blade implantation part, it is desirable to transmit ultrasonic waves from a position as close as possible to the rotor shaft from the viewpoint of widening the inspection range. For this reason, it is desirable to simplify the configuration inside the probe in the Y direction as much as possible and arrange the probe at a position close to the rotor shaft. Therefore, the ultrasonic inspection apparatus described in (4) is configured to press the probe against the disk surface by the attractive force of the magnet portion of the first frame on one side and the second frame on the other side in the X direction. ing. For this reason, for example, a device such as thinning the frame inside the probe in the Y direction in the holder can be made, and the configuration inside the probe in the Y direction can be simplified. Therefore, the probe can be arranged at a position close to the rotor shaft, and a wide inspection range of the ultrasonic inspection apparatus can be realized.

  (5) In some embodiments, in the ultrasonic inspection apparatus according to (4), the at least one magnet unit of the first frame includes a plurality of elements arranged in the Y direction along the probe. A magnet member is included, and the at least one magnet part of the second frame includes a plurality of magnet members arranged in the Y direction along the probe.

  According to the ultrasonic inspection apparatus described in (5) above, a plurality of magnet members arranged in the longitudinal direction (Y direction) of the first frame and a plurality of magnet members arranged in the longitudinal direction (Y direction) of the second frame. The magnet member can enhance the effect of stably pressing the probe against the disk surface of the rotor disk.

  (6) In some embodiments, in the ultrasonic inspection apparatus according to (5), the plurality of rotor disk running rollers are the most in the Y direction among the plurality of magnet members of the first frame. A first non-magnet roller provided on the outer side in the Y direction with respect to an outer magnet member, and an innermost position in the Y direction among the plurality of magnet members of the first frame. A second non-magnet roller provided at an interval on the inner side in the Y direction with respect to the magnet member, and a magnet member located on the outermost side in the Y direction among the plurality of magnet members of the second frame In contrast, a third non-magnet roller provided on the outer side in the Y direction with a space therebetween, and the plurality of magnets of the second frame. Respect to the magnet member located innermost in the Y direction in the preparative member, and a fourth non-magnetic roller provided spaced inwardly of the Y-direction.

  When a magnet roller is employed as the rotor disk running roller, the magnetic powder generated from the magnet roller may enter the bearing portion of the magnet roller and hinder smooth rotation of the roller. On the other hand, in the ultrasonic inspection apparatus described in (1) above, the probe can be stably pressed against the disk surface of the rotor disk by the attractive force of the magnet part of the first frame and the magnet part of the second frame. As described in (6) above, it is possible to employ a non-magnet roller as the rotor disk running roller. As a result, the risk that the rotor disk running roller does not rotate smoothly due to magnetic powder can be reduced, and the life of the ultrasonic inspection apparatus can be increased.

  Further, according to the ultrasonic inspection apparatus described in (6) above, each of the first to fourth non-magnet rollers is provided with an interval from an adjacent magnet member among the plurality of magnet members. Therefore, each non-magnet roller is hardly magnetized by the magnet member of each frame. Thereby, the risk that magnetic powder is generated from the rotor disk running roller and the risk that the magnetic powder enters the bearing portion of the roller can be reduced. Therefore, the risk that the rotor disk running roller does not rotate smoothly due to magnetic powder can be reduced, and the life of the ultrasonic inspection apparatus can be increased.

  (7) In some embodiments, in the ultrasonic inspection apparatus according to any one of (4) to (6), a first support unit that supports the holder so as to be rotatable around an X axis. And a biaxial gimbal unit including a second support unit that rotatably supports the first support unit around the Y axis.

  According to the ultrasonic inspection apparatus described in (7) above, the probe accommodated in the holder can be rotated around each of the X axis and the Y axis integrally with the holder. For this reason, even if there is an inclined part or a curved part on the disk surface of the rotor disk, the probe can be moved following the disk surface, so that the probe can be stably pressed against the disk surface.

  (8) In some embodiments, in the ultrasonic inspection apparatus according to (7), at least one guide rail extending in the Y direction for guiding the holder in the Y direction, and the guide A slider movable in the Y direction along the rail, and the second support unit is coupled to the slider and is configured to be located outside the probe in the Y direction. .

  As described in (4) above, when an oblique probe is used as a probe for the inspection of the wing implantation part, the configuration inside the probe in the Y direction is simplified from the viewpoint of widening the inspection range. It is desirable. Therefore, in the ultrasonic inspection apparatus described in (8) above, the second support unit of the biaxial gimbal unit is connected to the slider and is configured to be positioned outside the probe in the Y direction. Yes. As a result, it is possible to realize a layout in which the configuration interposed between the guide rail and the probe holder in order to move the probe in the X axis, Y axis, and Z axis is not positioned inside the probe in the Y direction. it can. For this reason, the effect which implement | achieves the wide test | inspection range of an ultrasonic inspection apparatus, and the effect as described in said (7) can be made compatible.

  (9) In some embodiments, in the ultrasonic inspection apparatus according to any one of the above (1) to (8), each of the plurality of rotor disk running rollers is configured so that the disk surface of the holder is the disk surface. Is configured to protrude toward the disk surface in the Z direction.

  According to the ultrasonic inspection apparatus described in (9) above, this makes it possible to avoid contact between the disk surface of the rotor disk and the holder, and to move the probe smoothly along the disk surface.

  (10) In some embodiments, in the ultrasonic inspection apparatus according to any one of (1) to (9), the probe is a surface of the holder that faces the disk surface. It is configured to protrude toward the disk surface in the Z direction.

  According to the ultrasonic inspection apparatus described in (10) above, the pressing force of the probe against the disk surface of the rotor disk is adjusted by adjusting the attractive force by the magnet part of the holder (for example, adding a magnet member to the holder). It becomes possible to do.

  (11) In some embodiments, in the ultrasonic inspection apparatus according to any one of (1) to (10), the carriage includes a connecting member that connects the plurality of rotor shaft running rollers. In addition, the connecting member is configured to be detachable with respect to a cart body including the holder.

  According to the ultrasonic inspection apparatus described in the above (11), it is possible to replace with a traveling unit composed of a plurality of rotor shaft traveling rollers and a connecting member in accordance with the diameter of the rotor shaft. The interval between the rotor shaft running rollers can be set to an optimum interval according to the diameter of the rotor shaft.

  (12) In some embodiments, in the ultrasonic inspection apparatus according to any one of (1) to (11), the carriage includes a connecting member that connects the plurality of rotor shaft running rollers. In addition, the connecting member is made of a flexible material.

  According to the ultrasonic inspection apparatus described in (12) above, a plurality of turbine rotors having different rotor shaft diameters can be obtained by deforming a connecting member made of a flexible material along the circumferential surface of the rotor shaft. Thus, an ultrasonic inspection apparatus can be applied.

  (13) In some embodiments, in the ultrasonic inspection apparatus according to any one of the above (1) to (12), the carriage is for extension different from the plurality of rotor shaft traveling rollers. A connecting portion for connecting an extension unit including the rotor shaft running roller.

  According to the ultrasonic inspection apparatus described in (13) above, the ultrasonic inspection apparatus can be applied to a plurality of turbine rotors having different rotor shaft diameters by adjusting the number of extension units attached. It becomes.

  (14) In some embodiments, in the ultrasonic inspection apparatus according to any one of (1) to (13), the cart is connected to the carriage and pulls the carriage in a circumferential direction of the rotor shaft. And a encoder for measuring a displacement amount of the wire.

  According to the ultrasonic inspection apparatus described in (14) above, if the carriage is circulated around the rotor shaft by pulling the wire in the circumferential direction, the displacement of the wire measured by the encoder is used to determine the rotor shaft of the carriage. The moving distance around can be measured. Thereby, the blade implantation part of the rotor disk can be inspected easily and accurately over the entire circumference in the circumferential direction of the rotor shaft.

  (15) In some embodiments, in the ultrasonic inspection apparatus according to any one of (1) to (14), each of the plurality of rotor disk running rollers is a non-magnet roller, and JISB0401 When the minimum tolerance of the shaft tolerance zone class g6 with respect to the nominal diameter d defined by Ｔ is T1, and the maximum tolerance of the hole tolerance zone class H7 with respect to the nominal diameter D defined by JISB0401 is T2, the plurality of The bearing clearance S of the rotor disk running roller satisfies the relationship of S> {(D + T2)-(d-T1)} / 2.

  In the ultrasonic inspection apparatus according to (1), the probe can be stably pressed against the disk surface of the rotor disk by the attractive force of the magnet part of the first frame and the magnet part of the second frame. ), It is possible to employ a non-magnet roller as the rotor disk running roller.

  Here, if a magnet roller is used as the rotor disk running roller, the rotor disk running roller itself is attracted to the disk surface of the rotor disk, so that the disk surface (especially inclined or curved surface) depends on the disk diameter of the rotor disk. It tends to be difficult to run following a certain disk surface.

  In this regard, in the ultrasonic inspection apparatus described in (15) above, a non-magnet roller is employed as the rotor disk running roller, and the relationship S> {(D + T2) − (d−T1)} / 2 is satisfied. As a result, it is possible to flexibly change the traveling direction of the roller, and it is possible to run following the disk surface according to the disk diameter of the rotor disk. In the above (15), “bearing clearance S” means a clearance between the shaft of the rotor disk running roller and the bearing hole, and the outer diameter of the shaft of the rotor disk running roller is R1, and the rotor disk running When the hole diameter of the bearing hole of the roller for use is R2, it is defined by S = (R2-R1) / 2.

  According to at least one embodiment of the present invention, there is provided an ultrasonic inspection apparatus capable of stably pressing a probe against a disk surface of a rotor disk and suppressing an increase in size of the apparatus configuration in the axial direction of the rotor shaft. Provided.

It is a perspective view which shows the structure of the ultrasonic inspection apparatus which concerns on one Embodiment. FIG. 2 is an enlarged perspective view near the probe of the ultrasonic inspection apparatus shown in FIG. 1. It is the expansion perspective view which looked at the probe vicinity of the ultrasonic inspection apparatus shown in FIG. 1 from the disk surface side. FIG. 2 is an enlarged side view of the vicinity of a probe in the ultrasonic inspection apparatus shown in FIG. 1. It is a perspective view which shows the structure of a holder assembly. It is a perspective view which shows the structure of a holder. It is a perspective view which shows the internal structure of a holder. It is a perspective view which shows the internal structure of a holder. It is a figure for demonstrating that a traveling unit can be replaced | exchanged according to the diameter of a rotor shaft. It is a figure for demonstrating the connection member comprised with the flexible material. It is a figure for demonstrating the expansion unit for expanding the rotor shaft driving | running | working roller. It is a figure for demonstrating the structure which measures the moving distance of a trolley | bogie.

Hereinafter, some embodiments of the present invention will be described with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative arrangements, etc. of the components described in the embodiments or shown in the drawings are not intended to limit the scope of the present invention, but are merely illustrative examples. Absent.
For example, expressions expressing relative or absolute arrangements such as “in a certain direction”, “along a certain direction”, “parallel”, “orthogonal”, “center”, “concentric” or “coaxial” are strictly In addition to such an arrangement, it is also possible to represent a state of relative displacement with an angle or a distance such that tolerance or the same function can be obtained.
For example, an expression indicating that things such as “identical”, “equal”, and “homogeneous” are in an equal state not only represents an exactly equal state, but also has a tolerance or a difference that can provide the same function. It also represents the existing state.
For example, expressions representing shapes such as quadrangular shapes and cylindrical shapes represent not only geometrically strict shapes such as quadrangular shapes and cylindrical shapes, but also irregularities and chamfers as long as the same effects can be obtained. A shape including a part or the like is also expressed.
On the other hand, the expressions “comprising”, “comprising”, “comprising”, “including”, or “having” one constituent element are not exclusive expressions for excluding the existence of the other constituent elements.

  FIG. 1 is a perspective view showing a configuration of an ultrasonic inspection apparatus 100 according to an embodiment.

  In one embodiment, as shown in FIG. 1, the ultrasonic inspection apparatus 100 inspects the blade implantation portion 8 (groove portion) of the rotor disk 6 in which the blade root portion 4 of the turbine blade 2 is implanted by ultrasonic waves. This is an ultrasonic inspection apparatus. The turbine blade 2 is a turbine blade of a steam turbine, for example.

  An ultrasonic inspection apparatus 100 shown in FIG. 1 includes a probe 10 and a carriage 12 for relatively moving the probe 10 along the rotor disk 6 in the circumferential direction of the rotor disk 6. The relative movement of the probe 10 with respect to the rotor disk 6 may be, for example, a form in which the carriage 12 is manually moved, or a form in which the carriage 12 is moved using power from a power source such as a motor (not shown). The turbine rotor 5 including the rotor disk 6 may be rotated with the position of the carriage 12 fixed.

  FIG. 2 is an enlarged perspective view of the vicinity of the probe 10 of the ultrasonic inspection apparatus 100 shown in FIG. FIG. 3 is an enlarged perspective view of the vicinity of the probe 10 of the ultrasonic inspection apparatus 100 shown in FIG. 1 as viewed from the disk surface 6 a side of the rotor disk 6. FIG. 4 is an enlarged side view of the vicinity of the probe 10 in the ultrasonic inspection apparatus 100 shown in FIG.

  As shown in FIGS. 2 to 4, the carriage 12 includes a plurality of rotor disk running rollers 14 (see FIGS. 2 and 3) for running on a disk surface 6 a (see FIG. 2) of the rotor disk 6, and a rotor. A plurality of rotor shaft traveling rollers 18 (see FIGS. 2 to 4) for traveling on a peripheral surface 16a (see FIG. 2) of the rotor shaft 16 provided concentrically with the disk 6 and the probe 10 on the disk surface 6a. A holder assembly 22 (see FIGS. 2 to 4) including a holder 20 that is held in an opposed state, and at least one guide rail for guiding the holder 20 in the radial direction of the rotor shaft 16 (hereinafter referred to as the Y direction). 24 (refer to FIG. 2 to FIG. 4. In the illustrated embodiment, two guide rails 24).

  Each of the rotor shaft traveling rollers 18 is a magnet roller, and is connected to the base end side (Y direction inner side) of the guide rail 24. Each of the rotor disk running rollers 14 is a non-magnet roller (a roller that does not have an attractive force with respect to the rotor disk 6 by a magnetic force) and is held by the holder 20. In addition, as for each of the rollers 18 for rotor shaft driving | running | working, the roller whole may be comprised with the magnet member, and a part of roller may be comprised with the magnet member. In addition, each of the rotor shaft traveling rollers 18 desirably has an attractive force (magnetic force) to the rotor shaft 16 such that the ultrasonic inspection apparatus 100 does not fall from the rotor shaft 16.

  According to the above configuration, ultrasonic waves are generated along the peripheral surface 16a of the rotor shaft 16 by the attractive force of the rotor shaft traveling roller 18 which is a magnet roller connected to the guide rail 24 for guiding the holder 20 in the Y direction. The inspection apparatus 100 can be moved, and the risk that the ultrasonic inspection apparatus 100 falls from the peripheral surface 16a of the rotor shaft 16 can be reduced.

  As shown in FIG. 4, each of the plurality of rotor disk running rollers 14 has a disk surface in the axial direction of the rotor shaft 16 (hereinafter referred to as the Z direction) rather than the surface 20 a facing the disk surface 6 a in the holder 20. It is comprised so that it may protrude to the 6a side. The probe 10 is configured to protrude toward the disk surface 6a in the Z direction from the surface 20a of the holder 20 that faces the disk surface 6a. Thereby, the contact between the holder 20 and the disk surface 6a can be avoided, and the ultrasonic inspection apparatus 100 can be smoothly moved along the disk surface 6a.

  2 to 4, the guide rail 24 extends along the Y direction. The holder assembly 22 includes a slider 26 that can move in the Y direction along the guide rail 24, and the Y-direction position of the probe 10 is the Y-axis adjustment knob 28 for the Y-direction mounting position of the slider 26 with respect to the guide rail 24. It is adjusted by changing by. Further, the Z-direction position of the probe 10 is adjusted by changing the Z-direction position of the holder 20 with respect to the guide rail 24 by a Z-axis adjustment knob 30 (see FIGS. 3 and 4).

  FIG. 5 is a perspective view showing the configuration of the holder assembly 22. As shown in FIG. 5, the holder assembly 22 includes a two-axis gimbal unit 32 that supports the holder 20 so as to be rotatable around two axes orthogonal to each other. When the direction perpendicular to each of the Y direction and the Z direction is the X direction, the biaxial gimbal unit 32 supports the holder 20 so as to be rotatable around each of the X axis and the Y axis. The biaxial gimbal unit 32 includes a first support unit 34 that supports the holder 20 so as to be rotatable around the X axis, and a second support unit 36 that supports the first support unit 34 so as to be rotatable around the Y axis. Including. The second support unit 36 is coupled to the slider 26 and is configured to be located outside the probe 10 in the Y direction.

  The first support unit 34 includes two rotating arms 40 and 42 that support the holder 20 so as to be rotatable around the X axis, and a connecting frame 38 that connects the rotating arm 40 and the rotating arm 42. . The holder 20 is provided between the turning arm 40 and the turning arm 42 in the X direction. The rotating arm 40 supports the holder 20 so as to be rotatable around the X axis on one end side in the Y direction, and is supported by the connecting frame 38 so as to be rotatable around the X axis on the other end side in the Y direction. The rotating arm 42 supports the holder 20 so as to be rotatable around the X axis on one end side in the Y direction, and is supported by the connecting frame 38 so as to be rotatable around the X axis on the other end side in the Y direction.

  According to the above configuration, the probe 10 accommodated in the holder 20 can be rotated around the X axis and the Y axis integrally with the holder 20. For this reason, even if the disk surface 6a (see FIG. 2) of the rotor disk 6 has an inclined part or a curved surface part, the probe 10 can be moved following the disk surface 6a. It can be pressed against the surface 6a.

  FIG. 6 is a perspective view showing the configuration of the holder 20. As shown in FIG. 6, the holder 20 includes a side frame 44, a side frame 46, a front frame 48 and a back frame 50 so as to surround the probe 10. Each of the side frame 44 and the side frame 46 extends in the Y direction along the probe 10, and is provided so that the probe 10 is positioned between the side frame 44 and the side frame 46. Each of the front frame 48 and the back frame 50 extends in the X direction along the probe 10, and is provided so that the probe 10 is positioned between the front frame 48 and the back frame 50. The front frame 48 is connected to the side frame 44 on one end side in the X direction, and is connected to the side frame 46 on the other end side in the X direction. The back frame 50 is connected to the side frame 44 on one end side in the X direction, and is connected to the side frame 46 on the other end side in the X direction. The holder 20 and the probe 10 may be fixed by a fixing member such as a bolt (not shown).

  In addition, as shown in FIG. 3, the coplanar supply port 51 for supplying coplanar (contact medium) is provided in the surface 44a, 46a facing the disk surface 6a in each of the side frames 44, 46. Thereby, a coplant is supplied between the probe 10 and the disk surface 6a, and an efficient transmission of an ultrasonic wave is realizable. In one embodiment, for example, as shown in FIG. 5, a replenishment unit 53 for replenishing coplanar may be provided on the surfaces 44 b and 46 b opposite to the disk surface 6 a in each of the side frames 44 and 46.

  FIG. 7 is a perspective view showing an internal configuration of the side frame 44 in the holder 20. FIG. 8 is a perspective view showing an internal configuration of the side frame 46 in the holder 20. As shown in FIG. 7, the side frame 44 includes a plurality of magnet members 52 (a plurality of magnet portions), and the plurality of magnet members 52 are arranged along the Y direction at intervals. Yes. As shown in FIG. 8, the side frame 46 includes a plurality of magnet members 52 (a plurality of magnet portions), and the plurality of magnet members 52 are arranged along the Y direction at intervals. Has been. Each shape of the magnet member 52 may be a square (a rectangular parallelepiped or a cube) as shown in FIG. 7, for example, or may be another shape.

  According to such a configuration, the magnet member 52 of the side frame 44 located on one side of the probe 10 and the magnet member 52 of the side frame 46 located on the other side constitute the disk surface 6a of the rotor disk 6 (see FIG. 2). Sucked to the side. For this reason, the probe 10 held by the holder 20 can be stably pressed against the disk surface 6a by the attractive force of the magnet member 52 generated on both sides of the probe 10. In addition, the probe 10 is moved by the attractive force of the magnet member 52 of the side frame 44 and the attractive force of the magnet member 52 of the side frame 46 without using a large magnet roller having a strong attractive force for the plurality of rotor disk running rollers 14. Since it can be stably pressed against the disk surface 6 a of the rotor disk 6, an increase in the size of the ultrasonic inspection apparatus 100 in the axial direction of the rotor shaft 16 can be suppressed.

  If a magnet roller is used as the rotor disk running roller 14, magnetic particles generated from the magnet roller may enter a bearing portion (not shown) of the magnet roller, thereby hindering smooth rotation of the roller. In this regard, in the ultrasonic inspection apparatus 100, the probe 10 is stably pressed against the disk surface 6a (see FIG. 2) of the rotor disk 6 by the attractive force of the magnet member 52 of the side frame 44 and the magnet member 52 of the side frame 46. Therefore, it is possible to employ a non-magnet roller as the rotor disk running roller 14 as described above. As a result, the risk that the rotor disk running roller 14 does not rotate smoothly due to magnetic powder can be reduced, and the life of the ultrasonic inspection apparatus 100 can be increased.

  Further, the rotor disk running roller 14 needs to have the flexibility to flexibly change the traveling direction of the roller 14 so as to follow the disk surface 6a in accordance with the disk diameter of the rotor disk 6. It is necessary to make the diameter as small as possible in consideration of the handling of the holder 20 and the like. In this regard, if the suction force is provided to the rotor disk running roller 14 itself, the suction to the disk surface 6a of the rotor disk 6 becomes dominant during the running of the ultrasonic inspection apparatus 100, and the flexibility and rotational performance of the roller 14 itself are obtained. May decrease. For this reason as well, a non-magnet roller is adopted as the rotor disk running roller 14 and the magnet members 52 for attracting the probe 10 to the disk surface 6a are provided on the side frame 44 and the side frame 46 as described above. It is desirable.

  On the other hand, the rotor shaft traveling roller 18 travels on the peripheral surface 16a of the rotor shaft 16 without dropping the entire ultrasonic inspection apparatus 100, and therefore has a larger adsorption force than the rotor disk traveling roller 14. In the case where the rotor shaft traveling roller 18 and the holder 20 are close to each other, a magnet for obtaining an attractive force to the peripheral surface 16a of the rotor shaft 16 is separated from the rotor shaft traveling roller 18. Considering that it is difficult to secure a space for providing, a magnet roller is adopted.

  For example, as shown in FIG. 4, the magnet portion 18a of the rotor shaft traveling roller 18 does not come into contact with the rotor shaft peripheral surface 16a as a risk countermeasure for the magnetic particle entrainment and the roller fixing of the rotor shaft traveling roller 18. As described above, the magnet portion 18a is provided with a gap g in the radial direction of the roller 18 with respect to the running surface 18b of the rotor shaft running roller 18 (attraction force is adjusted by adjusting the size of the gap g). Can be adjusted). In addition, the shaft 18c and the roller 18d of the roller 18 are detachable in consideration of maintenance (replacement) of the encoder gear 64a in the drag mechanism 66 and the encoder 64 for exhibiting the drag function described later. .

  Further, when an oblique probe is used as the probe 10 for the inspection of the wing implantation portion 8 (see FIG. 1), an ultrasonic wave is transmitted from a position as close as possible to the rotor shaft 16 from the viewpoint of widening the inspection range. It is desirable. For this reason, it is desirable to simplify the apparatus configuration inside the probe 10 in the Y direction as much as possible and arrange the probe 10 at a position close to the rotor shaft 16. Therefore, as described above, the ultrasonic inspection apparatus 100 presses the probe 10 against the disk surface 6a by the attractive force of the magnet member 52 of the one side frame 44 and the other side frame 46 in the X direction. It is composed. For this reason, for example, a device such as thinning the back frame 50 (see FIG. 5) inside the probe 10 in the Y direction in the holder 20 can be made, and the device configuration inside the probe 10 in the Y direction can be simplified. it can. Therefore, the probe 10 can be disposed at a position close to the rotor shaft 16, and a wide inspection range of the ultrasonic inspection apparatus 100 can be realized.

  In one embodiment, as shown in FIG. 7, among the plurality of rotor disk running rollers 14, the roller 14 a is a magnet member positioned on the outermost side in the Y direction among the plurality of magnet members 52 held by the side frame 44. 52 (52a) is provided outside the Y direction with a gap d. Of the plurality of rotor disk running rollers 14, the roller 14 b is in the Y direction with respect to the magnet member 52 (52 b) located on the innermost side in the Y direction among the plurality of magnet members 52 held by the side frame 44. Is provided with a gap d inside. 8, the roller 14c among the plurality of rotor disk running rollers 14 is a magnet member 52 (52c) positioned on the outermost side in the Y direction among the plurality of magnet members 52 held by the side frame 46. ) To the outside in the Y direction with a gap d. Of the plurality of rotor disk running rollers 14, the roller 14 d is in the Y direction with respect to the magnet member 52 (52 d) located on the innermost side in the Y direction among the plurality of magnet members 52 held by the side frame 46. Is provided with a gap d inside.

  In this way, each of the plurality of rotor disk running rollers 14 is provided at a distance d with respect to the adjacent magnet member 52 among the plurality of magnet members 52. It becomes difficult to be magnetized by the 46 magnet members 52. Thereby, the risk that magnetic particles are generated from the rotor disk running roller 14 and the risk that the magnetic particles enter a bearing portion (not shown) of the roller 14 can be reduced. Therefore, the risk that the rotor disk running roller 14 does not rotate smoothly due to magnetic powder can be reduced, and the life of the ultrasonic inspection apparatus 100 can be increased.

  In one embodiment, the rotor shaft traveling roller 18 may be a roller having a drag function. Thereby, when the carriage 12 is manually moved in the circumferential direction of the rotor disk 6 along the rotor disk 6, the risk of causing the ultrasonic inspection apparatus 100 to rapidly rotate and fall by sliding the hand is reduced. it can. The drag function is a function in which the roller rotates with an action force of a certain level or more. May be.

  In one embodiment, for example, as shown in FIGS. 2 and 3, the carriage 12 includes a connecting member 54 that connects a plurality of rotor shaft travel rollers 18. In this case, the connecting member 54 may be configured to be detachable from the cart body 12a including the holder 20. As a result, for example, as shown in FIG. 9, it is possible to replace the traveling unit 56 including the plurality of rotor shaft traveling rollers 18 and the connecting members 54 in accordance with the diameter D of the rotor shaft 16. The interval W between the rotor shaft traveling rollers 18 can be set to an optimum interval according to the diameter D of the rotor shaft.

  In one embodiment, for example, the connecting member 54 shown in FIGS. 2 and 3 may be made of a flexible material. As a result, as shown in FIG. 10, by deforming the connecting member 54 made of a flexible material along the circumferential surface of the rotor shaft 16, a plurality of turbine rotors 5 having different diameters D of the rotor shaft 16 can be obtained. Thus, the ultrasonic inspection apparatus 100 can be applied. In one embodiment, the connecting member 54 shown in FIG. 10 may be configured such that the number of attached rotor shaft traveling rollers 18 can be adjusted.

  In one embodiment, the connecting member 54 is, for example, as shown in FIG. 11, an additional rotor shaft traveling roller different from the plurality of rotor shaft traveling rollers 18 provided on the connecting member 54 (54 a). 18 may include a connecting portion 60 for connecting the extension unit 58 including 18. The connecting portion 60 shown in FIG. 11 is configured to connect to a connecting member 54 (54b) that connects a plurality of additional rotor shaft travel rollers 18 together. Thereby, the ultrasonic inspection apparatus 100 can be applied to a plurality of turbine rotors 5 having different diameters of the rotor shaft 16 by adjusting the number of extension units 58 attached. 2 and 3, for example, the connection portion 60 may be a ring-shaped member that protrudes from the rotor shaft traveling roller 18 to the outer side in the circumferential direction of the rotor shaft 16.

  In one embodiment, as shown in FIG. 12, for example, the ultrasonic inspection apparatus 100 is connected to a carriage 12 and has a wire 62 for pulling the carriage 12 in the circumferential direction of the rotor shaft 16 and a displacement amount of the wire 62. And an encoder 64 for measuring. As a result, if the carriage 12 is made to circulate around the rotor shaft 16 by pulling the wire 62 in the circumferential direction, the movement distance around the rotor shaft 16 in the carriage 12 can be determined from the displacement amount of the wire 62 measured by the encoder 64. Can be measured. Thereby, the blade implantation part 8 of the rotor disk 6 can be inspected easily and accurately over the entire circumference in the circumferential direction of the rotor shaft 16.

  The present invention is not limited to the above-described embodiments, and includes forms obtained by modifying the above-described embodiments and forms obtained by appropriately combining these forms.

  For example, in FIGS. 7 and 8, an example in which a plurality of magnet members 52 are provided on the side frame 44 and a plurality of magnet members 52 are provided on the side frame 46 is illustrated. The number of magnet members 52 provided may be one, or the holder 20 may have one magnet member extending from the side frame 44 to the side frame 46. 7 and 8 exemplify a form in which a plurality of magnet members 52 are incorporated in the side frame 44 and a plurality of magnet members 52 are incorporated in the side frame 46. However, the plurality of magnet members 52 include the side frame 44. And the outer surface of the side frame 46 may be attached. Further, the side frame 44, the side frame 46, the front frame 48, and the back frame 50 may be configured by different members, or two or more frames may be configured integrally by a single member.

2 Turbine blade 4 Blade root part 5 Turbine rotor 6 Rotor disk 6a Disk surface 8 Blade implantation part 10 Probe 12 Car 12a Car body 14 Rotor disk running roller 14a, 14b, 14c, 14d Roller 16 Rotor shaft 16a Circumferential surface 18 Rotor shaft Rolling roller 18a Magnet portion 18b Traveling surface 18c Shaft portion 18d Roller portion 20 Holder 20a Surface facing the disk surface 22 Holder assembly 24 Guide rail 26 Slider 28 Y-axis adjustment knob 30 Z-axis adjustment knob 32 2-axis gimbal unit 34 First Support unit 36 Second support unit 38 Connecting frame 40 Rotating arm 42 Rotating arm 44 Side frame 44a Surface facing the disk surface 44b Surface opposite to the disk surface 46 Side frame 46a Opposing the disk surface Surface 46b surface 48 opposite to the disk surface 48 front frame 50 back frame 51 coplanar supply port 52 magnet member 53 replenishment unit 54 connection member 56 travel unit 58 extension unit 60 connection part 62 wire 64 encoder 64a encoder gear 66 drag mechanism 100 Sonography equipment

Claims (15)

An ultrasonic inspection apparatus for ultrasonically inspecting a blade implantation portion of a rotor disk in which a blade root portion of a turbine blade is implanted,
A probe, and a carriage for moving the probe relative to the rotor disk,
The carriage includes a plurality of rotor disk traveling rollers for traveling on a disk surface of the rotor disk, and a plurality of rotor shaft traveling rollers for traveling on a circumferential surface of a rotor shaft provided concentrically with the rotor disk. And a holder for holding the probe in a state of facing the disk surface,
The holder is a first frame that extends along the probe and a second frame that extends along the probe, and is provided so that the probe is located between the first frame and the first frame. 2 frames, and
Each of said first frame and said second frame have at least one magnet member having a predetermined magnetic attraction force,
The ultrasonic inspection apparatus , wherein the holder is configured such that a relative position in the axial direction of the rotor shaft with respect to the plurality of rotor disk running rollers and the plurality of rotor shaft running rollers is unchanged . At least one guide rail extending in the Y direction for guiding the holder in the radial direction of the rotor shaft (hereinafter referred to as the Y direction);
2. The ultrasonic inspection apparatus according to claim 1, wherein each of the plurality of rotor shaft traveling rollers is a magnet roller connected to a proximal end side of the guide rail. An ultrasonic inspection apparatus for ultrasonically inspecting a blade implantation portion of a rotor disk in which a blade root portion of a turbine blade is implanted,
A probe, and a carriage for moving the probe relative to the rotor disk,
The carriage includes a plurality of rotor disk traveling rollers for traveling on a disk surface of the rotor disk, and a plurality of rotor shaft traveling rollers for traveling on a circumferential surface of a rotor shaft provided concentrically with the rotor disk. And a holder for holding the probe in a state of facing the disk surface,
The holder is a first frame that extends along the probe and a second frame that extends along the probe, and is provided so that the probe is located between the first frame and the first frame. 2 frames, and
Each of the first frame and the second frame has at least one magnet part,
The plurality of rotor disk running rollers include at least one non-magnet roller provided on the first frame and at least one non-magnet roller provided on the second frame.
Ultrasonic inspection device. The first frame is relative to the probe in the X direction orthogonal to the radial direction of the rotor shaft (hereinafter referred to as the Y direction) and the axial direction of the rotor shaft (hereinafter referred to as the Z direction). Provided on one side and extending in the Y direction along the probe;
The ultrasonic inspection apparatus according to claim 1, wherein the second frame is provided on the other side of the probe in the X direction and extends in the Y direction along the probe. . The at least one magnet portion of the first frame includes a plurality of magnet members arranged in the Y direction along the probe;
The ultrasonic inspection apparatus according to claim 4, wherein the at least one magnet portion of the second frame includes a plurality of magnet members arranged in the Y direction along the probe. An ultrasonic inspection apparatus for ultrasonically inspecting a blade implantation portion of a rotor disk in which a blade root portion of a turbine blade is implanted,
A probe, and a carriage for moving the probe relative to the rotor disk,
The carriage includes a plurality of rotor disk traveling rollers for traveling on a disk surface of the rotor disk, and a plurality of rotor shaft traveling rollers for traveling on a circumferential surface of a rotor shaft provided concentrically with the rotor disk. And a holder for holding the probe in a state of facing the disk surface,
The holder is a first frame that extends along the probe and a second frame that extends along the probe, and is provided so that the probe is located between the first frame and the first frame. 2 frames, and
Each of the first frame and the second frame has at least one magnet part,
The first frame is relative to the probe in the X direction orthogonal to the radial direction of the rotor shaft (hereinafter referred to as the Y direction) and the axial direction of the rotor shaft (hereinafter referred to as the Z direction). Provided on one side and extending in the Y direction along the probe;
The second frame is provided on the other side with respect to the probe in the X direction, and extends in the Y direction along the probe;
The at least one magnet portion of the first frame includes a plurality of magnet members arranged in the Y direction along the probe;
The at least one magnet portion of the second frame includes a plurality of magnet members arranged in the Y direction along the probe;
The plurality of rotor disk running rollers,
A first non-magnet roller provided on the outer side in the Y direction with respect to the magnet member located on the outermost side in the Y direction among the plurality of magnet members of the first frame;
A second non-magnet roller provided on the inner side in the Y direction with respect to the innermost magnet member in the Y direction among the plurality of magnet members of the first frame;
A third non-magnet roller provided on the outer side in the Y direction with a gap to the outermost magnet member in the Y direction among the plurality of magnet members of the second frame;
A fourth non-magnet roller provided at an inner side in the Y direction with respect to a magnet member located on the innermost side in the Y direction among the plurality of magnet members of the second frame;
including
Ultrasonic inspection device.   A biaxial gimbal unit including a first support unit that supports the holder so as to be rotatable around the X axis; and a second support unit that supports the first support unit so as to be rotatable around the Y axis. The ultrasonic inspection apparatus according to any one of claims 4 to 6. An ultrasonic inspection apparatus for ultrasonically inspecting a blade implantation portion of a rotor disk in which a blade root portion of a turbine blade is implanted,
A probe, and a carriage for moving the probe relative to the rotor disk,
The carriage includes a plurality of rotor disk traveling rollers for traveling on a disk surface of the rotor disk, and a plurality of rotor shaft traveling rollers for traveling on a circumferential surface of a rotor shaft provided concentrically with the rotor disk. And a holder for holding the probe in a state of facing the disk surface,
The holder is a first frame that extends along the probe and a second frame that extends along the probe, and is provided so that the probe is located between the first frame and the first frame. 2 frames, and
Each of the first frame and the second frame has at least one magnet part,
The first frame is relative to the probe in the X direction orthogonal to the radial direction of the rotor shaft (hereinafter referred to as the Y direction) and the axial direction of the rotor shaft (hereinafter referred to as the Z direction). Provided on one side and extending in the Y direction along the probe;
The second frame is provided on the other side with respect to the probe in the X direction, and extends in the Y direction along the probe;
A biaxial gimbal unit including a first support unit that supports the holder so as to be rotatable around the X axis; and a second support unit that supports the first support unit so as to be rotatable around the Y axis. Prepared,
At least one guide rail extending in the Y direction for guiding the holder in the Y direction; and a slider movable in the Y direction along the guide rail;
The second support unit is connected to the slider and is configured to be located outside the probe in the Y direction.
Ultrasonic inspection device. 9. Each of the plurality of rotor disk running rollers is configured to protrude toward the disk surface in the Z direction with respect to a surface of the holder facing the disk surface. The ultrasonic inspection apparatus according to item.   The ultrasonic inspection apparatus according to claim 1, wherein the probe is configured to protrude toward the disk surface in the Z direction with respect to a surface of the holder that faces the disk surface. . The carriage includes a connecting member that connects the plurality of rotor shaft running rollers,
The ultrasonic inspection apparatus according to claim 1, wherein the connecting member is configured to be detachable from a cart body including the holder. The carriage includes a connecting member that connects the plurality of rotor shaft running rollers,
The ultrasonic inspection apparatus according to claim 1, wherein the connecting member is made of a flexible material.   13. The vehicle according to claim 1, wherein the carriage includes a connecting portion for connecting an extension unit including an additional rotor shaft traveling roller different from the plurality of rotor shaft traveling rollers. Ultrasonic inspection device.   The wire for pulling the cart in the circumferential direction of the rotor shaft while being connected to the cart, and an encoder for measuring the amount of displacement of the wire, further comprising: The described ultrasonic inspection apparatus. An ultrasonic inspection apparatus for ultrasonically inspecting a blade implantation portion of a rotor disk in which a blade root portion of a turbine blade is implanted,
A probe, and a carriage for moving the probe relative to the rotor disk,
The carriage includes a plurality of rotor disk traveling rollers for traveling on a disk surface of the rotor disk, and a plurality of rotor shaft traveling rollers for traveling on a circumferential surface of a rotor shaft provided concentrically with the rotor disk. And a holder for holding the probe in a state of facing the disk surface,
The holder is a first frame that extends along the probe and a second frame that extends along the probe, and is provided so that the probe is located between the first frame and the first frame. 2 frames, and
Each of the first frame and the second frame has at least one magnet part,
Each of the plurality of rotor disk running rollers is a non-magnet roller,
When the minimum tolerance of the shaft tolerance range class g6 for the nominal diameter d specified in JISB0401 is T1, and the maximum tolerance of the hole tolerance range class H7 for the nominal diameter D specified in JISB0401 is T2,
The bearing gaps S of the plurality of rotor disk running rollers satisfy the relationship of S> {(D + T2) − (d−T1)} / 2.
Ultrasonic inspection device.

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