JP6611384B1 - Mounting member for rotor blade - Google Patents

Abstract

An object of the present invention is to inexpensively perform machining and measurement by mounting a rotor blade of an axial-flow compressor such as a jet engine or a rotor blade of a jet engine or a marine turbine to a processing machine or a measuring instrument via an attachment member. The present invention provides a mounting member for a rotating blade that is simple and can clamp the rotating blade with high accuracy and stability. A pair of pressure surfaces 4a and 4b of a root portion 2 of a rotary blade 1 is contactable with one pressure surface 4a and a pair of opposing surfaces 22a and 22b and 1 is contactable with the other pressure surface 4b. One or a pair of opposing surfaces 22a, 22b. [Selection] Figure 3

Description

The present invention is used when processing and measuring rotor blades of an axial-flow compressor such as a jet engine or rotor blades of a jet engine turbine or a marine turbine (not only during new manufacturing but also during repair and repair). The present invention relates to a rotary blade mounting member (clamp holder or mounting jig) used.

Machining and measurement of rotor blades of axial flow compressors such as jet engines or rotor blades of jet engine turbines and marine turbines, dovetail part 2 (see Fig. 1) formed at the root of rotor blades and Christmas The tree is clamped to an attachment member called a holder and attached to a processing apparatus or a measuring apparatus.

Here, the structure concept of the conventional holder and the clamp concept of the dovetail part 2 by the holder will be described with reference to FIG.

The dovetail portion 2 has a pair of left and right protruding portions 9a and 9b, and pressure surfaces 4a and 4b are formed on the upper surfaces of the protruding portions 9a and 9b, respectively (see FIG. 1). The holder 11 is a front side and a back side (the front side and the back side refer to the front side (front surface) side and the other side (back side) side of the front surface of the front view (FIG. 2A), respectively, and so on). Is opened, and a pair of contact portions 15a, 15b projecting from both side portions of the holder 11 toward the center portion so as to cover the pressure surfaces 4a, 4b are disposed, and the dovetail portion 2 is provided with the holder 11 It can be inserted into the holder 11 from the front side or the back side. On the bottom surfaces of the contact portions 15a and 15b, planar opposing surfaces 12a and 12b are formed which respectively oppose the pressure surfaces 4a and 4b of the dovetail portion 2. After the dovetail part 2 is inserted into the holder 11 from the front side or the back side of the holder 11, the dovetail part 2 is placed on the upper surface of the pressing part 16 by a linear mechanism (not shown) such as a screw mechanism or a pneumatic / hydraulic cylinder. And the dovetail part 2 is pushed upward and the pressure surfaces 4a and 4b are fitted to the opposing surfaces 12a and 12b, respectively, so that the holder 11 holds (clamps).

In the processing and measurement of the blade portion 3 etc. of the rotor blade, the product weight as a reference of the rotor blade is set in the holder, and the reference (reference on the holder) set in the holder 11 is the rotor blade 1 itself. This is done by substituting the standard included in the blade (blade internal standard).

  However, if processing and measurement of the blade portion 3 of the rotor blade is performed using the reference on the holder instead of the reference in the blade, instability or error in mounting when the dovetail portion 2 is clamped by the holder 11 As a result, there is a problem that an error occurs in the processing or measurement result of the blade portion 3 of the rotary blade 1 and the result is not stable.

  Conventionally, the opposed surface 12 of the holder 11 has been formed in a flat shape, but recently, in particular, the pressure surface 4 of the dovetail 2 has been changed due to a change in the mounting structure of the rotating blade 1 to the rotating disk. As shown in 1 (b), it has become a curved three-dimensional curved surface. For this reason, when the opposing surfaces 12a and 12b formed in the planar shape of the holder 11 and the pressure surfaces 4a and 4b formed in the three-dimensional curved shape of the dovetail 2 are respectively fitted, in a horizontal section (FIG. 2 (b 2), the vertical direction is the vertical direction of the paper surface, and the horizontal plane is the surface perpendicular to the vertical direction. The same applies hereinafter.) The contact portions of the opposing surface 12a and the pressure surface 4a, and the opposing surface 12b and the pressure surface 4b are shown in FIG. As shown in (c), there are one contact point P1 and one point P2. For this reason, as the pressure surfaces 4a, 4b or the opposing surfaces 12a, 12b as a whole, the reference pressure surface 4 and the opposing surface 12 cannot be in surface contact with each other, and each of the pressure surfaces 4a, 12b, 12b, 12b Since the contact is made only by a straight line, the clamp becomes unstable. As a result, it has been difficult to stably clamp the dovetail portion 2 of the rotor blade 1 with the holder 11 while ensuring high repeatability. As a result, even if the same rotor blade product is clamped by the holder 11 and processing and measurement are performed based on the standard on the holder, variations due to instability of the clamp occur, and variations in processing dimensions and measurement accuracy are stable. There is also a problem that it is difficult to guarantee repeatedly.

  The present invention has been made in order to solve the above-described problems of the prior art, and is intended to process the rotor blades of an axial flow compressor such as a jet engine or the rotor blades of a jet engine turbine or a marine turbine. Provided is a rotary blade mounting member that is inexpensive and simple and can clamp a rotary blade with high accuracy and stability when mounting and mounting a blade on a device via a mounting member. For the purpose.

  In order to solve the above-described problems, a first aspect of the present invention processes or measures a rotor blade of an axial-flow compressor, a turbine of a jet engine, or a rotor blade of a marine turbine using a processing machine or a measuring machine. A rotary blade attachment member used to mount the rotary blade on the processing machine or the measuring instrument, and is attached to one pressure surface of a pair of pressure surfaces of a root portion of the rotary blade. It is characterized by comprising a pair of opposing surfaces that can contact and one or a pair of opposing surfaces that can contact the other pressure surface.

  According to a second aspect of the present invention, in the first aspect, the pair of pressure surfaces are three-dimensional curved surfaces.

According to the present invention, a rotating blade of an axial flow compressor such as a jet engine or a rotating blade of a jet engine turbine or a marine turbine is attached to a processing machine or a measuring instrument via an attachment member to process the blade portion or the like. When performing measurement, it is possible to provide an attachment member for a rotating blade that is inexpensive and simple and can clamp the rotating blade with high accuracy and stability.

It is a figure which shows an example of the structural concept of a dovetail part, (a) is a front view, (b) is a right view. It is a figure which shows the concept of the conventional holder which clamps a dovetail part, (a) is a front view, (b) is a right view, (c) is an arrow directional view of the cross section EE of (a). It is a figure which shows 1st embodiment of the attachment member of the rotary blade which concerns on this invention, (a) is a left view, (b) is a front view, (c) is a right view, (d) is (b) ) Is an arrow view of a section A-A1-A2-A, and (e) is an arrow view of a section FF of (b). It is a figure which shows 2nd embodiment of the attachment member of the rotary blade which concerns on this invention, (a) is a left view, (b) is a front view, (c) is a right view, (d) is (b) ) Is an arrow view of a section B-B1-B2-B, and (e) is an arrow view of a section GG of (b). It is a figure which shows 3rd embodiment of the attachment member of the rotary blade which concerns on this invention, (a) is a left view, (b) is a front view, (c) is a right view, (d) is (b) (B) is an arrow view of the section C-C1-C2-C, and (e) is an arrow view of the section HH of (b). It is a figure which shows 4th embodiment of the attachment member of the rotary blade which concerns on this invention, (a) is a left view, (b) is a front view, (c) is a right view, (d) is (b) ) Is an arrow view of the arrow D-D1-D2-D, and (e) is an arrow view of the section KK of (b). It is a perspective view which shows the concept when the rotary blade by which the dovetail part was hold | gripped using the attachment member which concerns on this invention was mounted | worn with the three-dimensional processing machine.

  Embodiments of an attachment member according to the present invention will be described below with reference to the drawings.

  FIG. 3 is a view showing a first embodiment of the attachment member for the rotor blade according to the present invention, and is a view showing a state in which the dovetail portion 2 of the rotor blade 1 is gripped by the attachment member 21.

  The attachment member 21 is provided with a pair of front and rear contact portions 24a and 24b that cover the pressure surface 4a on the left side of the pair of left and right pressure surfaces 4a and 4b of the dovetail portion 2 of the rotor blade 1 in a bowl shape. On the bottom surfaces of the contact portions 24a and 24, planar facing surfaces 22a and 22b are formed in parallel with the left pressure surface 4a, respectively (the left side and the right side are shown in FIG. 3B). The left side and the right side of the paper surface in FIG. 3 and the front and the back indicate the front side and the back side of the paper surface in FIG. Here, the parallel surface and the flat surface include parallel and flat surfaces within a manufacturing tolerance range and a design allowable range (for example, within a range in which similar effects can be obtained), and the pressure surface 4a is curved. Parallel in the case of a three-dimensional curved surface means parallel to the tangent plane of the central portion of the pressure surface 4a, and the opposing surface is not only a plane portion but also an end portion subjected to end processing such as chamfering or fillet. Included (the same applies hereinafter). Similarly, the attachment member 21 is provided with a pair of front and rear contact portions 25a and 25b that cover the pressure surface 4b on the right side of the pair of left and right pressure surfaces 4a and 4b in a bowl shape. On the bottom surfaces of 25a and 25, planar facing surfaces 23a and 23b are formed in parallel to the right pressure surface 4b, respectively. The contact portions 24a, 24b, 25a, and 25b are connected to support portions 26a, 26b, 27a, and 27b extending upward from the base portion at the bottom of the attachment member 21, respectively.

  Further, the opposing surfaces 22a and 22b that oppose the pressure surface 4a are formed in the same plane, so that when the abutting portions 24a and 24b are brought into contact with the curved three-dimensional curved pressure surface 4a, the opposing surfaces 22a and 22b are opposed to each other. The surfaces 22a and 22b are in linear contact with the pressure surface 4a at contact lines L1 and L2, which are ends on the central side of the pressure surface 4a (see FIG. 3D). Here, the same plane refers to the same plane within a manufacturing allowable error range or a design allowable range (for example, within a range in which a similar effect can be obtained) (hereinafter the same). Also, the contact portions 25a and 25b have basically the same structure as the contact portions 24a and 24b, and when the contact portions 25a and 25b are brought into contact with the curved pressure surface 4b having a curved shape, The opposing surfaces 23a and 23b are in linear contact with the pressure surface 4b at contact lines L3 and L4 that are ends on the center side of the pressure surface 4b (not shown).

  The attachment member 21 further includes a pressing portion 16 that can be brought into contact with the bottom surface of the dovetail portion 2 by moving back and forth (up and down) by the screw mechanism 17 at a lower portion thereof. Note that another type of linear motion mechanism using a pneumatic cylinder, a hydraulic cylinder, or the like instead of the screw mechanism 17 may be used (hereinafter the same including other embodiments). Dovetail from the front side (the front side of the paper in FIG. 3B) or the back side (the other side of the paper in FIG. 3B) with the front end of the pressing portion 16 separated from the bottom surface of the dovetail portion 2 by an appropriate distance. The portion 2 is inserted into the internal space of the attachment member 21, that is, the space surrounded by the opposing surfaces 22 a, 22 b, 23 a, 23 b and the upper surface of the pressing portion 16. After the dovetail portion 2 is inserted into the mounting member 21, the pressing portion 16 is pressed against the bottom surface of the dovetail portion 2 by the screw mechanism 27, and the dovetail portion 2 is sandwiched between the contact portions 24 a, 24 b, 25 a, 25 b and the pressing portion 16. As a result, the dovetail portion 2 is gripped (clamped) by the mounting member 21.

  Note that the gripping procedure may be that the pressure surface 4 is brought into contact with all or a part of the contact portions 24a, 24b, 25a, 25b and then the pressing portion 16 is pushed in, or the pressure surface 4 is brought into contact with the contact portion 24a. , 24b, 25a, 25b, and the pressing portion 16 may be pushed in from a state apart from all of them.

  With the above configuration, the dovetail portion 2 is gripped by the attachment member 21, and the opposing surfaces 12a and 12b formed in a planar shape and the pressure surfaces 4a and 4b formed in the three-dimensional curved surface shape of the dovetail 2 are respectively fitted. 3 (e), in the horizontal cross section, the pressure surface 4a contacts the opposing surface 22a and the opposing surface 22b at the contact points P3 and P4, respectively, and the pressure surface 4b includes the opposing surface 23a and the opposing surface 23b. And P5 and P6, respectively, so that the dovetail portion 2 can be gripped stably and reliably by the mounting member 21.

  In the above description, the dovetail portion 2 that is a three-dimensional curved surface with the pressure surfaces 4a and 4b curved is described as a gripping object of the mounting member 21, but the gripping object of the mounting member 21 is a flat pressure surface. The dovetail part 2 which has 2 may be sufficient. For example, the area where the opposing surfaces 22a and 22b facing the pressure surface 4a are in contact with the pressure surface 4a is reduced as compared with the conventional holder and the surface pressure is increased, so that the accuracy of gripping the dovetail portion 2 is improved. The same applies to other embodiments described below.

  As described above, the attachment member 21 can grip the dovetail portion 2 stably and reliably with high reproducibility. Thereby, it is possible to process and measure the blade portion 3 of the rotor blade 1 with high accuracy by using the reference in the blade instead of the reference on the holder.

  FIG. 4 is a view showing a second embodiment of the attachment member according to the present invention, and is a view showing a state in which the dovetail portion 2 of the rotary blade 1 is gripped by the attachment member 31. In the following description, items that are not described are the same as those in the first embodiment unless there is a contradiction or the like.

  The attachment member 31 is provided with a pair of front and rear contact portions 34a and 34b that cover the pressure surface 4a on the left side of the pair of left and right pressure surfaces 4a and 4b of the dovetail portion 2 of the rotor blade 1 in a bowl shape. On the bottom surfaces of the abutting portions 34a and 34b, planar opposing surfaces 32a and 32b that are opposed in parallel to the left pressure surface 4a are formed, respectively. Further, the mounting member 31 is provided with a contact portion 35 that covers the right pressure surface 4b of the pair of left and right pressure surfaces 4a and 4b in a bowl shape, and the bottom surface of the contact portion 35 has a right pressure surface. A flat opposed surface 33 is formed in parallel to 4b. The contact portions 34a, 34b, and 35 are connected to support portions 36a, 36b, and 37 that extend upward from the base portion at the bottom of the attachment member 21, respectively.

  The contact portions 34a and 34b in the present embodiment are the same as the contact portions 24a and 24b in the first embodiment. When the contact portions 34a and 34b are in contact with the curved pressure surface 4a, the opposing surfaces 32a and 32b are The contact surfaces L5 and L6, which are the end portions on the center side, come into linear contact with the pressure surface 4a (not shown). On the other hand, since the surface of the opposing surface 33 that opposes the pressure surface 4a is a flat surface, the contact portion 35 in the present embodiment is opposed when the contact portion 35 is brought into contact with the curved pressure surface 4b having a curved surface. It contacts the pressure surface 4b in a straight line at the contact line L7 which is substantially the center of the surface 33 (see FIG. 3D).

  As in the first embodiment, the attachment member 31 in the present embodiment further includes a pressing portion 16 that can be moved forward and backward with respect to the bottom surface of the dovetail portion 2 at the lower portion thereof. The pressing portion 16 can be moved forward and backward with respect to the bottom surface of the dovetail portion 2 by a screw mechanism 17 provided at the lower portion of the attachment member 31, and the distal end of the pressing portion 16 is extended from the bottom surface of the dovetail portion 2. The dovetail portion 2 is placed in the attachment member 31 from the front side (the front side of the paper surface in FIG. 4B) or the back side (the other side of the paper surface in FIG. 3B) with an appropriate distance away, that is, the contact portion. It is inserted into a space surrounded by 34 a, 34 b, the contact portion 35 and the pressing portion 16. After the dovetail portion 2 is inserted into the mounting member 31, the pressing portion 16 is abutted against and pressed against the bottom surface of the dovetail portion 2 by the screw mechanism 17, and the dovetail portion 2 is sandwiched between the abutting portions 34 a, 34 b and 35 and the pressing portion 16. Thus, the dovetail portion 2 is gripped (clamped) by the attachment member 31.

  With the above configuration, the dovetail portion 2 is gripped by the attachment member 31, and the opposing surfaces 32a and 32b formed in a flat shape and the pressure surfaces 4a and 4b formed in the three-dimensional curved surface shape of the dovetail 2 are fitted to each other. As shown in FIG. 4 (e), in the horizontal cross section, the pressure surface 4a contacts the opposing surface 32a and the opposing surface 32b at the contact points P7 and P8, respectively, and the pressure surface 4b contacts the opposing surface 33 and the contact point P9. Therefore, the dovetail portion 2 can be stably and reliably gripped by the attachment member 31.

  In the above description, the attachment member 31 has a pair of contact portions 34a and 34b at a position facing the left pressure surface 4a of the dovetail portion 2, and one contact portion at a position facing the right pressure surface 4b. However, conversely, a pair of contact portions 34a and 34b are disposed at a position facing the right pressure surface 4b of the dovetail portion 2, and one contact is disposed at a position facing the left pressure surface 4a. The part 35 may be provided.

  As described above, also in the second embodiment, the mounting member 31 can hold the dovetail portion 2 stably and reliably with high reproducibility as in the first embodiment. Thereby, it is possible to process and measure the blade portion 3 of the rotor blade with high accuracy by substituting the reference in the blade with the reference on the holder.

  FIG. 5 is a view showing a third embodiment of the attachment member according to the present invention, and is a view showing a state in which the dovetail portion 2 of the rotary blade 1 is gripped by the attachment member 41. In the following description, items that are not described are the same as those in the first or second embodiment unless there is a contradiction or the like.

  The attachment member 41 is provided with a contact portion 44 that covers the pressure surface 4a on the left side of the pair of left and right pressure surfaces 4a and 4b of the dovetail portion 2 of the rotor blade 1 in a bowl shape. Is provided with a pair of protrusions 48a, 48b protruding in a plateau shape toward the left pressure surface 4a (see FIG. 5 (e)) (the front / rear direction refers to FIG. 5 (e)). It points in the vertical direction, and the lower side of the figure is the forward direction). Moreover, planar opposing surfaces 42a and 42b are formed on the surfaces of the protrusions 48a and 48b, respectively (see FIG. 5E). Similarly, the attachment member 21 is provided with a contact portion 45 that covers the right pressure surface 4b of the pair of left and right pressure surfaces 4a and 4b in a bowl shape. A pair of protrusions 49c and 49d protruding in a plateau shape toward the surface 4b are arranged in the front-rear direction. Also, planar opposing surfaces 43a and 43b are formed on the surfaces of the protrusions 49c and 49d, respectively (see FIG. 5E). The contact portions 44 and 45 are connected to support portions 46 and 47 extending upward from the base portion at the bottom of the attachment member 41, respectively.

  Further, the facing surfaces 42a and 42b facing the left pressure surface 4a are formed in the same plane as shown in FIG. 5 (e), thereby forming a three-dimensional curved surface in which the contact portion 44 is curved. When brought into contact with the pressure surface 4a, in the horizontal cross section, the opposing surfaces 42a and 42b come into contact with the pressure surface 4a at the contact points P10 and P11, which are the end portions on the center side of the contact portion 44 (FIG. 5). (See (e)), in the vertical cross section, linearly contacts the pressure surface 4a along the linear contact lines L8 and L9 along the end of the contact portion 44 on the center side (see FIG. 5D). ). Similarly, the opposing surfaces 43a and 43b that oppose the right pressure surface 4b are formed in the same plane, so that when the contact portion 45 is brought into contact with the curved three-dimensional curved pressure surface 4b, In the cross section, the opposing surfaces 43a and 43b are in contact with the pressure surface 4b at the contact points P12 and P13, which are the ends on the center side of the contact portion 44 (see FIG. 5E), and in the vertical cross section, The opposed surfaces 43a and 43b are in linear contact with the pressure surface 4b along linear contact lines L10 and L11 along the end of the contact portion 45 on the center side.

  The mounting member 41 is provided with a pressing portion 16 that can be moved back and forth toward the bottom surface of the dovetail portion 2 by the screw mechanism 17. When the dovetail portion 2 is gripped by the pressing portion 16 and the abutting portions 44 and 45, the mounting member 41 faces. Since the surfaces 42a, 42b, 43a, 43b are in contact with the pressure surfaces 4a, 4b at the contact lines L8, L9, L10, L11, the dovetail portion 2 can be gripped stably and reliably with high reproducibility. Thereby, it is possible to process and measure the blade portion 3 of the rotor blade with high accuracy by substituting the reference in the blade with the reference on the holder.

  FIG. 6 is a view showing a fourth embodiment of the attachment member according to the present invention, and is a view showing a state in which the dovetail portion 2 of the rotary blade 1 is gripped by the attachment member 51. In the following description, items that are not described are the same as those in the first to third embodiments unless there is a contradiction or the like.

  The attachment member 51 is provided with a contact portion 54 that covers the pressure surface 4a on the left side of the pair of left and right pressure surfaces 4a and 4b of the dovetail portion 2 of the rotor blade 1 in a bowl shape. Are provided with a pair of protrusions 58a, 58b protruding in the front-rear direction so as to protrude toward the left pressure surface 4a. Planar facing surfaces 42a and 42b are formed on the surfaces of the protrusions 58a and 58b facing the pressure surface 4a, respectively (see FIG. 6E). Further, the mounting member 21 is provided with a contact portion 45 that covers the right pressure surface 4b of the pair of left and right pressure surfaces 4a and 4b in a bowl shape, and faces the pressure surface 4b of the contact portion 45. A flat opposing surface 53 is formed on the surface (see FIG. 6E). The contact portions 54 and 55 are connected to support portions 56 and 57 that extend upward from the base portion at the bottom of the attachment member 41, respectively.

  The opposing surfaces 42a and 42b that oppose the left pressure surface 4a are formed in the same plane as in the third embodiment, so that the contact surface 54 is curved to the three-dimensional curved pressure surface 4a. When contacted, in the horizontal cross section, the opposing surfaces 42a and 42b contact the pressure surface 4a at the contact points P14 and P15, which are the ends of the center of the contact portion 54, respectively (see FIG. 6 (e)). In the vertical cross section, the opposing surfaces 42a and 42b are in linear contact with the pressure surface 4a along linear contact lines L12 and L13 along the end of the contact portion 54 on the center side (not shown). ).

  On the other hand, when the facing surface 53 facing the right pressure surface 4b is brought into contact with the curved three-dimensional curved pressure surface 4b, the facing surface 53 becomes a contact point at the center of the contact portion 44 in the horizontal section. In P16, the pressure surface 4b is contacted (see FIG. 6E), and in the vertical section, the pressure surface 4b is linearly contacted at a linear contact line L14 at the center of the contact portion 55.

  In the above description, the attachment member 51 is located at a position facing the pressure surface 4a on the right side and a contact portion 54 having a pair of facing surfaces 52a and 52b at a position facing the pressure surface 4a on the left side of the dovetail portion 2. The abutting portion 55 having one opposing surface 53 is disposed, but conversely, the abutting portion 54 having a pair of opposing surfaces 52a and 52b at a position facing the right pressure surface 4b of the dovetail portion 2. A contact portion 55 having one facing surface 53 may be disposed at a position facing the left pressure surface 4a.

  The attachment member 51 is provided with a pressing portion 16 that can be moved forward and backward by the screw mechanism 17 toward the bottom surface of the dovetail portion 2. When the dovetail portion 2 is gripped by the pressing portion 16 and the contact portions 54 a, 54 b, 55, Since the contact portions 54a, 54b, and 55 are in linear contact with the pressure surfaces 4a and 4b at the contact lines L12, L13, and L14, the dovetail portion 2 can be gripped stably and reliably with high reproducibility. Thereby, it is possible to process and measure the blade portion 3 of the rotor blade with high accuracy by substituting the reference in the blade with the reference on the holder.

  FIG. 7 is a perspective view showing a concept when the rotating blade 1 having the dovetail portion gripped by the mounting member according to the present invention is mounted on the three-dimensional NC processing machine 71.

  The three-dimensional NC processing machine 71 includes an X-axis table 73, a Y-axis table 74, a vertical V-axis table 75, an Xθ table 76, a Zθ-axis table 77, and a horizontal H-axis table 78. A mounting member 81 that is provided and holds the rotary blade 1 via the dovetail portion 2 is attached to the Y-axis table 74.

  An appropriate machining tool 80 is attached to the main shaft 72 according to the type and content of machining, and the wings and the like are machined. The horizontal H-axis table 78 is equipped with a three-dimensional measuring device 79 for measuring a three-dimensional shape such as a wing. As the three-dimensional measuring device 79, a non-contact type measuring device using a laser beam, a stylus type measuring device, or the like is used.

  In the description of the embodiment, a three-dimensional processing machine and a three-dimensional measuring instrument are used as a processing machine and a measuring instrument, respectively. However, a simpler processing machine and a measuring instrument (for example, a two-dimensional processing machine) Also good.

DESCRIPTION OF SYMBOLS 1 Rotating blade 2 Dovetail part 3 Blade | wing part 4a, 4b Pressure surface 9a, 9b Overhang | projection part 11 Holder 12a, 12b Opposing surface 15a, 15b Abutting part 16 Pressing part 17 Screw mechanism 21 Mounting member 22a, 22b, 23a, 23b Opposing surface 24a, 24b, 25a, 25b Abutting portions 26a, 26b, 27a, 27b Support portion 31 Mounting members 32a, 32b, 33 Opposing surfaces 34a, 34b, 35 Abutting portions 36a, 36b, 37 Support portions 41 Mounting members 42a, 42b , 43a, 43b Opposing surfaces 44, 45 Abutting portions 46, 47 Support portions 48a, 48b, 48c, 48d Protruding portions 51 Mounting members 52a, 52b, 53 Opposing surfaces 54, 55 Abutting portions 56, 57 Supporting portions 58a, 58b Projection 81 Mounting member

Claims (1)

Pressurized KOKI or measuring instruments the rotor blades of the axial compressor having a pressure face in which the pair of eave-shaped surface of the blade portion side of the projecting portion formed on both sides of the dovetail is formed as a three-dimensional curved surface A mounting member for a rotor blade used for mounting to
A pair of opposed surfaces which can come into contact with the pressure surface of one of the projecting portions of the pair of protruding portions,
And one or a pair of opposed surfaces which can come into contact with the pressure surface of the other overhanging portion of the pair of protruding portions,
A mounting member for a rotor blade comprising:

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