Telemetry

Abstract

To provide a telemeter capable of improving a transmission radio wave intensity.SOLUTION: A telemeter is used for a measurement of a rotary machine and comprises: a transmitter capsule mounted in a plurality of holes formed in a rotary body of the rotary machine; a transmitter built in the transmitter capsule; and a transmission antenna led from the transmitter to the outside of the transmitter capsule and transmitting output of the transmitter. The transmitter capsule includes: a capsule main body formed in a bottomed cylindrical shape and inserted into the holes in such a manner that an opening is directed outside, and incorporating the transmitter; and an antenna mounting member disposed in an end on the opening side in an axial direction of the capsule main body and having an insulative mounting flange expanded outside in a radial direction of an axis from the capsule main body. The transmission antenna is mounted to the mounting flange in an annular shape extending in a circumferential direction of the axis when viewed from the axial direction.SELECTED DRAWING: Figure 8

Description

Technical Field

[0004] ,

[0006] , , ,

[0005] , , ,

[0001] This disclosure relates to a telemeter.

Background Art

[0002] Patent Document 1 discloses a rotational vibration stress measuring device (telemeter) for measuring vibration stress generated in moving blades such as steam turbines. This telemeter includes a plurality of capsules arranged around the axis of the rotating shaft of a rotating machine. A transmitter is stored in one of the plurality of capsules. A power source is stored in two of the plurality of capsules. One capsule and the two capsules are connected by a transmission antenna. The transmission antenna is arranged in a convex curved shape (arch shape) in one direction.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the telemeter described in Patent Document 1, there is a case where the distance between a conductor such as a capsule or surrounding parts and the transmission antenna becomes close, resulting in a decrease in the transmission radio wave intensity.

[0005] This disclosure has been made to solve the above problems, and an object thereof is to provide a telemeter that can improve the transmission radio wave intensity.

Means for Solving the Problems

[0006] To solve the above problems, the telemeter according to the present disclosure is a telemeter used for measuring a rotating machine, comprising: a transmitter capsule attached to a plurality of holes formed in the rotating body of the rotating machine; a transmitter built into the transmitter capsule; and a transmitting antenna extended from the transmitter to the outside of the transmitter capsule and transmitting the output of the transmitter, wherein the transmitter capsule is formed in the shape of a bottomed cylinder and is inserted into the holes with its opening facing outward, and comprises a capsule body that houses the transmitter and an antenna positioned at the end of the capsule body on the opening side in the axial direction ru Antenna mounting components and The capsule body is fastened with bolts for securing the antenna mounting member, It has, The antenna mounting member comprises a mounting member body that fits into the opening of the capsule body, and an insulating mounting flange that extends radially outward from the mounting member body relative to the capsule body. The transmitting antenna is mounted on the mounting flange in an annular manner, extending in the circumferential direction of the axis when viewed from the axial direction. Furthermore, the bolt is provided so as to penetrate the mounting member body in the axial direction. . Furthermore, the telemeter according to this disclosure is a telemeter used for measuring a rotating machine, comprising: a transmitter capsule attached to a plurality of holes formed in the rotating body of the rotating machine; a transmitter built into the transmitter capsule; and a transmitting antenna drawn out from the transmitter to the outside of the transmitter capsule and transmitting the output of the transmitter, wherein the transmitter capsule is formed in the shape of a bottomed cylinder and is inserted into the holes with its opening facing outward and has a capsule body that houses the transmitter; and an antenna mounting member positioned at the end of the capsule body on the opening side in the axial direction and having an insulating mounting flange that protrudes radially outward from the capsule body than the capsule body, wherein the transmitting antenna is attached to the mounting flange in an annular manner extending in the circumferential direction of the axis when viewed from the axial direction, wherein the mounting flange is formed in a plurality of locations spaced apart in the circumferential direction and has antenna holes through which the transmitting antenna can be inserted, and the transmitting antenna is attached to the antenna mounting member by being inserted into the plurality of antenna holes and woven in a wave-stitch manner so as to vibrate in the axial direction when viewed from the radial direction. Furthermore, the telemeter according to this disclosure is a telemeter used for measuring a rotating machine, comprising: a transmitter capsule attached to a plurality of holes formed in the rotating body of the rotating machine; a transmitter built into the transmitter capsule; and a transmitting antenna drawn out from the transmitter outside the transmitter capsule and transmitting the output of the transmitter, wherein the transmitter capsule is formed in the shape of a bottomed cylinder and is inserted into the holes with its opening facing outward, and comprises a capsule body that houses the transmitter, and a device positioned at the end of the capsule body on the opening side in the axial direction of the capsule body, and The antenna mounting member also has an insulating mounting flange that protrudes radially outward from the axis, and the transmitting antenna is mounted on the mounting flange in an annular manner extending in the circumferential direction of the axis when viewed from the axial direction, and the mounting flange has multiple antenna holes formed at intervals in the circumferential direction through which the transmitting antenna can be inserted, and the transmitting antenna is attached to the antenna mounting member by being inserted through the multiple antenna holes and being wound around the antenna mounting member and woven in a spiral shape extending in the circumferential direction. [Effects of the Invention]

[0007] According to the telemetry method described herein, the transmitted radio wave intensity can be improved. [Brief explanation of the drawing]

[0008] [Figure 1] This is an overall diagram showing the configuration of the telemeter according to the embodiment of this disclosure. [Figure 2] This is an enlarged view of the main part of the telemeter according to the embodiment of this disclosure. [Figure 3] This is a cross-sectional view showing a transmitter and power supply according to an embodiment of the present disclosure. [Figure 4] This is a perspective view showing a capsule according to an embodiment of the present disclosure. [Figure 5] This is a perspective view showing an antenna mounting member according to an embodiment of the present disclosure. [Figure 6] This is a plan view of a capsule according to an embodiment of the present disclosure, as seen from the lid side. [Figure 7] This is a cross-sectional view showing an antenna mounting member according to an embodiment of the present disclosure. [Figure 8]This is a plan view illustrating how to install a transmitting antenna according to an embodiment of this disclosure. [Figure 9] This is a cross-sectional view illustrating how to attach a transmitting antenna according to an embodiment of this disclosure. [Figure 10] This is a plan view illustrating a method for attaching a transmitting antenna according to a modified embodiment of the present disclosure. [Figure 11] This is a cross-sectional view illustrating a method for attaching a transmitting antenna according to a modified embodiment of the present disclosure. [Figure 12] This contour map shows the range in which the transmitted radio wave intensity around the transmitter capsule according to the embodiment of this disclosure exceeds a predetermined value. [Figure 13] This contour map shows the range in which the transmitted radio wave intensity around the transmitter capsule of a comparative example in which the transmitting antenna is formed in an arch shape exceeds a predetermined value. [Modes for carrying out the invention]

[0009] (Telemeter configuration) The telemeter 100 according to this embodiment will be described below with reference to Figures 1 to 9. Figure 1 shows the rotor 1 (rotating body) of a steam turbine (rotating machine, not shown) equipped with a telemeter 100. Multiple balance holes 2 (holes) are formed at radial positions on the rotor 1, arranged in the circumferential direction. The balance holes 2 have a substantially circular cross-section and extend along the axial direction of the rotor 1. In this embodiment, the balance holes 2 are screw holes 21 with screw threads cut into their inner circumferential surfaces. The multiple balance holes 2 are arranged in an annular shape around the axis of the rotor 1. The rotor 1 also has multiple rotor blades 3 on its outer circumference. The multiple rotor blades 3 are arranged in the circumferential direction of the rotor 1. In Figure 1, for simplicity, only the six rotor blades 3 equipped with the telemeter 100 according to this disclosure are shown. The telemeter 100 is provided on each rotor blade 3. Figure 2 is an enlarged view showing the configuration of the telemeter 100 of this embodiment. In the following, the telemeter 100 for one rotor blade 3 will be described as an example.

[0010] As shown in FIG. 1, the telemeter 100 according to the present embodiment is used for measuring a steam turbine. Specifically, the telemeter 100 measures the vibration stress applied to each moving blade 3 without contact. As shown in FIGS. 1 to 3, the telemeter 100 includes a plurality of sensor units 4, a plurality of lead wires 5 for the sensor units, a capsule 6, a transmitter 7, a transmitting antenna 8, a power source 9, a lead wire 10 for the power source, a power supply ON / OFF terminal board 11, a receiver 12, and a receiving antenna 13.

[0011] (Sensor unit) The plurality of sensor units 4 are respectively attached to a plurality of positions on the same moving blade 3 of the steam turbine. In the present embodiment, the sensor unit 4 is a strain gauge 41 for measuring the vibration stress applied to the moving blade 3. As an example, three strain gauges 41 are used for the moving blade 3. The strain gauges 41 are attached at the same positions on each of the six moving blades 3.

[0012] (Lead wire for sensor unit) The lead wire 5 for the sensor unit extends from the sensor unit 4 radially inward of the rotor 1. In the present embodiment, since three strain gauges 41 are provided for each moving blade 3, three lead wires 5 for the sensor unit are used for each moving blade 3. The three lead wires 5 for the sensor unit are twisted together in a spiral shape to form a single lead wire, except for a part. Each individual lead wire 5 for the sensor unit is covered by an exterior. The lead wire 5 for the sensor unit is attached to the rotor 1 and the moving blade 3 at appropriate positions by an adhesive and fixed to the rotor 1 and the moving blade 3.

[0013] (Capsule) The capsule 6 is attached to the balance hole 2. The capsule 6 includes a transmitter capsule 6a in which the transmitter 7 is incorporated, and a power supply capsule 6b in which the power source 9 is incorporated. The power supply capsule 6b has the same configuration as the transmitter capsule 6a. Therefore, hereinafter, the configuration will be described simply as the capsule 6 without distinguishing between the transmitter capsule 6a and the power supply capsule 6b.

[0014] In this embodiment, one transmitter capsule 6a and one power supply capsule 6b are provided for each rotor blade 3 equipped with a sensor unit 4. The transmitter capsule 6a and the power supply capsule 6b are attached to balance holes 2 located radially inward of the rotor 1 relative to the rotor blade 3 equipped with the sensor unit 4. The balance hole 2 in which the transmitter capsule 6a is located and the balance hole 2 in which the power supply capsule 6b is located are adjacent to each other in the circumferential direction of the rotor 1. The positions of the balance holes 2 to which the transmitter capsule 6a and the power supply capsule 6b are attached are appropriately selected considering the overall balance of the rotor 1.

[0015] As shown in Figures 3 to 7, the capsule 6 comprises a capsule body 60, an antenna mounting member 70, a lid 80, a bolt 81, and a washer 82. The capsule body 60 is made of a metal material. The capsule body 60 is formed in a bottomed cylindrical shape. In this embodiment, the capsule body 60 is formed in a cylindrical shape. The capsule body 60 is inserted into the balance hole 2 with the opening 61 facing outwards. The capsule body 60 of the transmitter capsule 6a houses the transmitter 7. The capsule body 60 of the power supply capsule 6b houses the power supply 9.

[0016] Hereinafter, the axis O of the capsule body 60 may be simply referred to as "axis O," the radial direction with respect to the axis O of the capsule body 60 may be simply referred to as "radial direction," and the circumferential direction with respect to the axis O of the capsule body 60 may be simply referred to as "circumferential direction."

[0017] The capsule body 60 has a cylindrical portion 62, a capsule flange 63, and a fitting wall portion 64. The cylindrical portion 62 is formed as a bottomed cylinder extending in the direction of the axis O. The opening 65 of the cylindrical portion 62 is open outwards. The cylindrical portion 62 is the part of the capsule body 60 that is inserted into the balance hole 2. A threaded portion 66 is formed on the outer circumferential surface of the cylindrical portion 62. The threaded portion 66 is screwed into a threaded groove (not shown) formed on the inner circumferential surface of the balance hole 2. In this way, the capsule body 60 is fastened and fixed to the balance hole 2. In the case of the transmitter capsule 6a, the transmitter 7 is built into the cylindrical portion 62, and in the case of the power supply capsule 6b, the power supply 9 is built into the cylindrical portion 62. The capsule flange 63 is in contact with the outer circumferential surface of the rotor 1.

[0018] The capsule flange 63 is provided at the end of the cylindrical portion 62 on the opening 65 side in the axial direction O. The capsule flange 63 protrudes radially from the outer circumferential surface of the cylindrical portion 62. The capsule flange 63 is formed in an annular shape when viewed from the axial direction O.

[0019] The capsule flange 63 has a plurality of fastening holes 67. The plurality of fastening holes 67 are formed at equal intervals in the circumferential direction. In this embodiment, six fastening holes 67 are formed in the capsule flange 63. The fastening holes 67 penetrate the capsule flange 63 in the axial direction O.

[0020] Furthermore, the capsule flange 63 has through holes 68 through which the sensor lead wire 5, the transmitting antenna 8 (described later), and the power supply lead wire 10 are inserted. The through holes 68 penetrate the capsule flange 63 radially. The through holes 68 are formed to avoid the fastening holes 67. Note that the through holes 68 are formed not only in the transmitter capsule 6a but also in the power supply capsule 6b. Multiple through holes 68 are formed, with at least three: one for the sensor lead wire 5, one for the transmitting antenna 8, and one for the power supply lead wire 10.

[0021] The fitting wall portion 64 is formed in an annular shape along the outer edge of the capsule flange 63. The fitting wall portion 64 is formed to rise from the capsule flange 63 in the direction of axis O on the opposite side from the capsule body 60.

[0022] (Antenna mounting components) The antenna mounting member 70 is positioned at the end of the capsule body 60 on the opening 61 side in the axial direction O. The antenna mounting member 70 comprises a mounting member body 71, a collar 72, and a mounting flange 73.

[0023] The mounting member body 71 is made of a resin material. The mounting member body 71 is insulating. The mounting member body 71 is formed in a disc shape. The thickness direction of the mounting member body 71 coincides with the axis O direction. The end of the mounting member body 71 on the capsule body 60 side in the axis O direction is fitted into the fitting wall 64.

[0024] Multiple collars 72 are embedded inside the mounting member body 71. The multiple collars 72 are provided at equal intervals in the circumferential direction. In this embodiment, six collars 72 are provided. The collars 72 are formed in a cylindrical shape extending in the direction of axis O. Both ends of the collars 72 in the direction of axis O are open. The collars 72 are provided so as to penetrate the mounting member body 71 in the direction of axis O. The collars 72 are made of a metal material. Bolts 81, which will be described later, are inserted through the collars 72.

[0025] Furthermore, a mounting flange 73 is provided at the end of the mounting member body 71 opposite to the capsule body 60 in the axial direction O. The mounting flange 73 protrudes radially outward from the capsule body 60. When viewed from the axial direction O, the mounting flange 73 is formed in an annular shape that extends in the circumferential direction. The mounting flange 73 is integrally formed with the capsule body 60 from the same resin material as the mounting member body 71. Therefore, the mounting flange 73 has insulating properties similar to the mounting member body 71. The mounting flange 73 has an antenna hole 74 through which the transmitting antenna 8, which will be described later, can be inserted.

[0026] Multiple antenna holes 74 are formed at intervals in the circumferential direction. In this embodiment, the multiple antenna holes 74 are arranged at equal intervals in the circumferential direction. The antenna holes 74 are formed not only in the transmitter capsule 6a but also in the power supply capsule 6b. However, the transmitting antenna 8 is not inserted through the antenna holes 74 formed in the power supply capsule 6b.

[0027] (lid) The lid 80, together with the capsule body 60, sandwiches the antenna mounting member 70 from the direction of axis O. The lid 80 is made of a metal material. The lid 80 is formed in a disc shape. The center line of the lid 80 coincides with axis O. The outer diameter of the lid 80 is smaller than the outer diameter of the mounting flange. The lid 80 is superimposed on the antenna mounting member 70. The lid 80 is provided with a plurality of through holes 83 through which bolts 81 are inserted. The plurality of through holes 83 are formed at equal intervals in the circumferential direction. In this embodiment, a plurality of through holes 83 are formed in the lid 80. Each through hole 83 is provided in a position that coincides with the collar 72 and the fastening hole 67 in the direction of axis O.

[0028] (bolt) The bolt 81 is inserted from the lid 80 side in the axial direction O through the insertion hole 83 of the lid 80, the collar 72 of the antenna mounting member 70, and the fastening hole 67 of the capsule body 60. The tip of the bolt 81 is fastened with the fastening hole 67 of the capsule body 60. In this way, the bolt 81 fastens the antenna mounting member 70 to the capsule body 60. The bolt 81 is made of a metal material.

[0029] (Washer) The washer 82 is positioned between the head of the bolt 81 and the cover 80. The washer 82 is made of a metal material. The washer 82 is provided to prevent the bolt 81 from slipping.

[0030] (Transmitter) The transmitter 7 is housed in the transmitter capsule 6a. The transmitter 7 is also electrically connected to the strain gauge 41 via the sensor lead wire 5. The transmitter 7 in this embodiment is a 3-channel transmitter and is configured to transmit the data measured by the strain gauge 41 to the receiver 12, which will be described later, at three different frequencies.

[0031] (Transmitting antenna) The transmitting antenna 8 is led out of the transmitter capsule 6a from the transmitter 7 through a through hole 68. The transmitting antenna 8 is configured to transmit output to the outside from the transmitter 7. As shown in Figures 8 and 9, the portion of the transmitting antenna 8 that is led out of the transmitter capsule 6a is attached to the antenna mounting member 70 in an annular shape that extends circumferentially when viewed from the direction of axis O. In this embodiment, the transmitting antenna 8 is mounted in an annular shape.

[0032] In this embodiment, the transmitting antenna 8 is inserted through a plurality of antenna holes 74. The transmitting antenna 8 is attached to the antenna mounting member 70 by weaving it in a wave-stitch pattern so that it vibrates in the direction of axis O when viewed from the radially outside. The transmitting antenna 8 is attached around the entire circumference of the mounting flange 73. The end of the transmitting antenna 8 opposite to the transmitter 7 is fixed to the antenna mounting member 70. The transmitting antenna 8 is covered from the outside of the transmitter capsule 6a with an adhesive. The adhesive covering the transmitting antenna 8 is, for example, an epoxy adhesive. In this way, the transmitting antenna 8 is integrated with the transmitter capsule 6a.

[0033] (power supply) As shown in Figure 3, the power supply 9 is built into the power capsule 6b. The power supply 9 supplies power to the transmitter 7. In this embodiment, the power supply 9 is a battery 91.

[0034] (Power supply lead wires) As shown in Figure 2, the power supply lead wire 10 connects the power supply 9 and the transmitter 7, and is configured to supply power from the power supply 9 to the transmitter 7. The power supply lead wire 10 is inserted through a through hole 68 in the capsule body 60 and pulled out of the capsule 6. The power supply lead wire 10 is located on the outer surface of the rotor 1. The power supply lead wire 10 located on the outer surface of the rotor 1 is covered with adhesive. The power supply lead wire 10 also connects the power supply 9 and the power ON / OFF terminal board 11.

[0035] (Terminal board for power ON / OFF) The power ON / OFF terminal board 11 functions as a switch to change the power supply status from the power supply 9. The power ON / OFF terminal board 11 can be installed at any position on the rotor 1. This power ON / OFF terminal board 11 allows power saving by turning off the power supply 9 when power is not needed, such as when not taking measurements.

[0036] (Receiver) The receiver 12 is located in the control room for the steam turbine. The receiver 12 receives the data transmitted from the transmitter 7.

[0037] (Receiving antenna) As shown in Figure 3, the receiving antenna 13 is located on the stationary side of the steam turbine. The receiving antenna 13 is a copper pipe formed in an arc shape. The receiving antenna 13 is arranged to face multiple balance holes 2 and the rotor 1 in the axial direction. The receiving antenna 13 is installed on the stationary side using a stand or the like. The receiving antenna 13 is configured to receive data transmitted from the transmitting antenna 8 into the receiver 12. The receiving antenna 13 is spaced approximately 100 mm away from the transmitting antenna 8. In this embodiment, the receiving antenna 13 is spaced, for example, 90 mm to 110 mm away from the transmitting antenna 8. The distance between the receiving antenna 13 and the transmitting antenna 8 is preferably less than 100 mm.

[0038] When measuring the vibration stress of the rotor blade 3, the rotor 1 is rotated. As the rotor 1 rotates, strain gauges 41 placed on the rotor blade 3 generate a current corresponding to the stress applied to the rotor blade 3. The measured current value data is then transmitted to the transmitter 7 via sensor lead wires 5, from the transmitter 7 to the transmitting antenna 8, from the transmitting antenna 8 to the receiving antenna 13, and from the receiving antenna 13 to the receiver 12. In this embodiment, since three strain gauges 41 are provided on the rotor blade 3, three sets of data are transmitted from the transmitter 7 to the receiver 12.

[0039] (Telemetry installation procedure) Next, the installation procedure for the telemeter 100 according to this embodiment will be briefly described. First, the transmitter 7 is housed in the transmitter capsule 6a, and the power supply 9 is housed in the power supply capsule 6b. Then, the transmitter capsule 6a and the power supply capsule 6b are attached to adjacent balance holes 2. Next, power supply lead wires 10 are extended from the power supply 9 and wired to the surface of the rotor 1. Furthermore, the power supply lead wires 10 are inserted into the transmitter capsule 6a and connected to the transmitter 7. After that, the receiving antenna 13 is installed facing the balance hole 2. At this time, the distance between the transmitting antenna 8 and the receiving antenna 13 is set to the furthest distance (approximately 100 mm) that ensures a gain difference of 20 dB or more between the received radio waves and standing waves, taking safety into consideration.

[0040] (Effects and Benefits) The telemeter 100 of this embodiment comprises a transmitter capsule 6a, a transmitter 7 built into the transmitter capsule 6a, and a transmitting antenna 8 that extends from the transmitter 7 outside the transmitter capsule 6a and transmits the output of the transmitter 7. The transmitter capsule 6a has an antenna mounting member 70 having an insulating mounting flange 73 that protrudes radially outward from the capsule body 60 along the axis O. The transmitting antenna 8 is mounted on the mounting flange 73 in an annular shape that extends in the circumferential direction of the axis O when viewed from the direction of the axis O.

[0041] This ensures that a predetermined distance is maintained between the transmitter capsule 6a and surrounding components, and the transmitting antenna 8. Furthermore, because the transmitting antenna 8 is mounted in a ring shape, the physical distance between the receiving antenna 13 and the transmitting antenna 8 can be made uniform, allowing for a high density arrangement of the transmitting antennas 8. As a result, the telemeter 100 of this embodiment can improve the transmitted radio wave strength. This makes it possible to increase the distance between the transmitting antenna 8 and the receiving antenna 13. This reduces the possibility of antenna damage and improves safety. In addition, the improved transmitted radio wave strength leads to reduced labor in measurement preparation work.

[0042] In this embodiment, the mounting flange 73 is formed in an annular shape that extends circumferentially when viewed from the direction of axis O. Therefore, the transmitting antenna 8 can be easily attached compared to cases where the mounting flange 73 is formed in the shape of a rod or a polygonal frame.

[0043] In this embodiment, the transmitter capsule 6a has a bolt 81 for fastening the antenna mounting member 70 to the capsule body 60. Furthermore, the antenna mounting member 70 has a collar 72 inside through which the bolt 81 is inserted.

[0044] As a result, the antenna mounting member 70 is firmly attached to the capsule body 60 by fastening. Furthermore, the bolt 81 is inserted through a collar 72 provided inside the antenna mounting member 70. This prevents deformation of the antenna mounting member 70 due to external force from the bolt 81 and maintains the axial force of the bolt 81. This makes it difficult for the bolt 81 to come loose, and the fixing of the antenna mounting member 70 becomes more secure.

[0045] In this embodiment, the mounting flange 73 is formed in multiple locations spaced apart in the circumferential direction and has an antenna hole 74 through which the transmitting antenna 8 can be inserted.

[0046] This allows the transmitting antenna 8 to be attached to the antenna mounting member 70 by inserting it through the antenna hole 74. With conventional arched antennas, if the arch is installed incorrectly, there is a risk that the antenna will be damaged or scattered during rotor rotation, damaging the steam turbine. However, with this embodiment, the transmitting antenna 8 is attached to the antenna mounting member 70, making the attachment of the transmitting antenna 8 much more secure. As a result, the possibility of damage to the transmitting antenna 8 is further reduced, and safety is further improved.

[0047] In this embodiment, the transmitting antenna 8 is inserted through a plurality of antenna holes 74 and attached to the antenna mounting member 70 by being woven in a wave-stitch pattern so as to vibrate in the axial direction O when viewed from the radial direction.

[0048] This allows the transmitting antenna 8 to be attached to the transmitter capsule 6a in a regular circumferential manner. Furthermore, the length of the transmitting antenna 8 can be set to be relatively short.

[0049] As shown in Figures 10 and 11, the transmitting antenna 8 may also be attached to the antenna mounting member 70 by being inserted through a plurality of antenna holes 74 and being wound around the antenna mounting member 70 in a spiral shape extending in the circumferential direction. In this case as well, the transmitting antenna 8 is attached around the entire circumference of the mounting flange 73.

[0050] In this case, the transmitting antenna 8 can be attached to the transmitter capsule 6a in a regular circumferential manner. Furthermore, the length of the transmitting antenna 8 can be set to be relatively long. The mounting method for the transmitting antenna 8 can be selected as appropriate, either in a wave-stitch pattern or a spiral pattern. Furthermore, a mounting method other than wave-stitch or spiral may be adopted depending on the situation.

[0051] Furthermore, transmitted radio waves have a natural length corresponding to the transmission frequency. To improve the transmitted radio wave strength, it is preferable that the overall length (lead wire length) of the transmitting antenna 8 be 1, 1 / 2, or 1 / 4 of this natural length.

[0052] In this embodiment, the system further includes a power supply capsule 6b having the same configuration as the transmitter capsule 6a, and which incorporates a power supply 9 that supplies power to the transmitter 7.

[0053] This makes the weight of the transmitter capsule 6a equal to the weight of the power supply capsule 6b. As a result, there is less of a weight difference between the part of the rotating body where the transmitter 7 is located and the part where the power supply 9 is located. This makes it easier to balance the rotor 1 as a whole.

[0054] In this embodiment, a receiving antenna 13 may be further provided on the stationary side of the rotating machine, spaced at a distance of 90 mm to 110 mm from the transmitting antenna 8.

[0055] This makes it possible to ensure a predetermined distance between the transmitting antenna 8 and the receiving antenna 13 while maintaining a gain difference of 20 dB or more between the received radio waves and standing waves. Therefore, the telemeter 100 of this embodiment can improve the transmitted radio wave strength while maintaining safety.

[0056] Next, the improvement in transmitted radio wave intensity by the telemeter 100 of this embodiment will be explained in comparison with a comparative example. In the comparative example, the transmitting antenna 8 connects the transmitter capsule 6a and the power supply capsule 6b and is arranged to form a curved shape (arch shape) that is convex in one direction.

[0057] As shown in Figures 12 and 13, in this embodiment, the range in which the transmitted radio wave intensity exceeds a predetermined value is expanded compared to the conventional product in which the transmitting antenna 8 is formed in an arch shape, which was used as a comparative example. This result indicates that the transmitted radio wave intensity is improved in this embodiment compared to the conventional product in which the transmitting antenna 8 is formed in an arch shape.

[0058] (Other embodiments) Although embodiments of this disclosure have been described in detail above with reference to the drawings, the specific configuration is not limited to these embodiments and may include design changes and the like that do not depart from the gist of this disclosure. In the above embodiment, a steam turbine was used as an example of a rotating machine in which the telemeter 100 is provided, but it is not limited to this. The telemeter 100 may be provided in, for example, a large rotating machine such as a gas turbine.

[0059] In the above embodiment, the case in which the telemeter 100 measures vibration stress without contact was described, but it is not limited to this. The telemeter 100 may also be used to measure temperature.

[0060] In the above embodiment, multiple sensor units 4 are provided on each rotor blade 3, and multiple sensor units 4 are connected to one transmitter 7 by multiple sensor unit lead wires 5. However, this is not the only configuration. For example, each rotor blade 3 may be provided with one sensor unit 4, and one sensor unit 4 may be connected to one transmitter 7 by one sensor unit lead wire 5.

[0061] In the above embodiment, the mounting member body 71 and the mounting flange 73 were assumed to be made of a resin material, but this is not limited to that. The mounting member body 71 and the mounting flange 73 may be made of an insulating material other than a resin material.

[0062] <Note> The telemeter 100 described in each embodiment is understood, for example, as follows:

[0063] (1) The telemeter 100 of the first embodiment is a telemeter 100 used for measuring a rotating machine, comprising: a transmitter capsule 6a attached to a plurality of holes formed in the rotating body of the rotating machine; a transmitter 7 built into the transmitter capsule 6a; and a transmitting antenna 8 drawn out from the transmitter 7 to the outside of the transmitter capsule 6a and transmitting the output of the transmitter 7, wherein the transmitter capsule 6a is formed in the shape of a bottomed cylinder and is inserted into the hole with an opening 61 facing outward and has a capsule body 60 that houses the transmitter 7; and an antenna mounting member 70 positioned at the end of the capsule body 60 on the side of the opening 61 in the direction of axis O and having an insulating mounting flange 73 that protrudes radially outward from the capsule body 60 in the direction of axis O, wherein the transmitting antenna 8 is attached to the mounting flange 73 in an annular shape that extends in the circumferential direction of axis O when viewed from the direction of axis O. Examples of rotating machinery include the steam turbines and gas turbines mentioned above. An example of a rotating body is the rotor of a steam turbine.

[0064] This ensures that a predetermined distance is maintained between the transmitter capsule 6a and surrounding components and other conductive materials, as well as the transmitting antenna 8. Furthermore, because the transmitting antenna 8 is mounted in a ring shape, the physical distance between the receiving destination of the transmitted radio waves and the transmitting antenna 8 is made uniform, allowing for a high density of transmitting antennas 8 to be arranged.

[0065] (2) The telemeter 100 of the second embodiment is the telemeter 100 of (1), wherein the transmitter capsule 6a further has bolts 81 for fastening the antenna mounting member 70 to the capsule body 60, and the antenna mounting member 70 may have a collar 72 inside through which the bolts 81 are inserted.

[0066] As a result, the antenna mounting member 70 is firmly attached to the capsule body 60 by fastening. Furthermore, the bolt 81 is inserted through a collar 72 provided inside the antenna mounting member 70. This prevents deformation of the antenna mounting member 70 due to external force from the bolt 81 and maintains the axial force of the bolt 81.

[0067] (3) The telemeter 100 of the third embodiment is the telemeter 100 of (1) or (2), wherein the mounting flange 73 is formed in multiple locations spaced apart in the circumferential direction and has an antenna hole 74 through which the transmitting antenna 8 can be inserted.

[0068] This allows the transmitting antenna 8 to be attached to the antenna mounting member 70 by inserting it through the antenna hole 74.

[0069] (4) The telemeter 100 of the fourth embodiment is the telemeter 100 of (3), wherein the transmitting antenna 8 is inserted through a plurality of antenna holes 74 and attached to the antenna mounting member 70 by being woven in a wave-stitch pattern so as to vibrate in the direction of the axis O when viewed from the radial direction.

[0070] This allows the transmitting antenna 8 to be attached to the transmitter capsule 6a in a regular circumferential manner. Furthermore, the length of the transmitting antenna 8 can be made relatively short.

[0071] (5) The telemeter 100 of the fifth embodiment is the telemeter 100 of (3), wherein the transmitting antenna 8 is inserted through a plurality of antenna holes 74 and attached to the antenna mounting member 70 by being wound around the antenna mounting member 70 and woven in a spiral shape extending in the circumferential direction.

[0072] This allows the transmitting antenna 8 to be attached to the transmitter capsule 6a in a regular circumferential manner. Furthermore, the length of the transmitting antenna 8 can be made relatively long.

[0073] (6) The sixth embodiment of the telemeter 100 is any of (1) to (5) and further comprises a power supply capsule 6b having the same configuration as the transmitter capsule 6a and containing a power supply 9 that supplies power to the transmitter 7.

[0074] This makes the weight of the transmitter capsule 6a equal to the weight of the power supply capsule 6b. As a result, there is less of a weight difference between the part of the rotating body where the transmitter 7 is located and the part where the power supply 9 is located.

[0075] (7) The telemeter 100 of the seventh embodiment is any telemeter 100 of (1) to (6), which may further include a receiving antenna 13 positioned on the stationary side of the rotating machine at a distance of 90 mm to 110 mm from the transmitting antenna 8.

[0076] This makes it possible to ensure a predetermined distance between the transmitting antenna 8 and the receiving antenna 13 while maintaining a gain difference of 20 dB or more between the received radio waves and standing waves. [Explanation of symbols]

[0077] 1…Rotor 2…Balance hole 21…Screw hole 3…Motor blade 4…Sensor section 41…Strain gauge 5…Lead wire for sensor section 6…Capsule 6a…Transmitter capsule 6b…Power supply capsule 60…Capsule body 61…Opening 62…Cylindrical section 63…Capsule flange 64…Fitting wall section 65…Opening 66…Screw section 67…Fastening hole 68…Through hole 70…Antenna mounting component 71…Mounting component body 72…Collar 73…Mounting flange 74…Antenna hole section 80…Lid 81…Bolt 82…Washer 83…Through hole 7…Transmitter 8…Transmitting antenna 9…Power supply 91…Battery 10…Lead wire for power supply 11…Terminal board for power ON / OFF 12…Receiver 13…Receiving antenna 100…Telemetry O…Axis

Claims

1. A telemeter used for measuring rotating machinery, A transmitter capsule is attached to a plurality of holes formed in the rotating body of the aforementioned rotating machine, The transmitter built into the aforementioned transmitter capsule, A transmitting antenna is extended from the transmitter outside the transmitter capsule and transmits the output of the transmitter, Equipped with, The aforementioned transmitter capsule is A capsule body formed in the shape of a bottomed cylinder, inserted into the hole with its opening facing outward, and containing the transmitter, An antenna mounting member is positioned at the end of the capsule body on the opening side in the axial direction, The capsule body is fastened with bolts for securing the antenna mounting member, It has, The aforementioned antenna mounting member is A mounting member body that is fitted into the opening of the capsule body, An insulating mounting flange extends radially outward from the capsule body relative to the mounting member body, It has, The transmitting antenna is mounted on the mounting flange in an annular manner, extending in the circumferential direction of the axis when viewed from the axial direction. The bolt is provided so as to penetrate the mounting member body in the axial direction, in a telemeter.

2. The telemeter according to claim 1, wherein the antenna mounting member has a collar inside through which the bolt is inserted.

3. A telemeter used for measuring rotating machinery, A transmitter capsule is attached to a plurality of holes formed in the rotating body of the aforementioned rotating machine, The transmitter built into the aforementioned transmitter capsule, A transmitting antenna is extended from the transmitter outside the transmitter capsule and transmits the output of the transmitter, Equipped with, The aforementioned transmitter capsule is A capsule body formed in the shape of a bottomed cylinder, inserted into the hole with its opening facing outward, and containing the transmitter, An antenna mounting member having an insulating mounting flange positioned at the end of the capsule body on the opening side in the axial direction and extending radially outward from the capsule body in the axial direction, It has, The transmitting antenna is mounted on the mounting flange in an annular manner, extending in the circumferential direction of the axis when viewed from the axial direction. The mounting flange is formed in multiple locations spaced apart in the circumferential direction and has an antenna hole through which the transmitting antenna can be inserted. The transmitting antenna is attached to the antenna mounting member by being inserted through a plurality of antenna holes and woven in a wave-stitch pattern so as to vibrate in the axial direction when viewed from the radial direction, in a telemeter.

4. A telemeter used for measuring rotating machinery, A transmitter capsule is attached to a plurality of holes formed in the rotating body of the aforementioned rotating machine, The transmitter built into the aforementioned transmitter capsule, A transmitting antenna is extended from the transmitter outside the transmitter capsule and transmits the output of the transmitter, Equipped with, The aforementioned transmitter capsule is A capsule body formed in the shape of a bottomed cylinder, inserted into the hole with its opening facing outward, and containing the transmitter, An antenna mounting member having an insulating mounting flange positioned at the end of the capsule body on the opening side in the axial direction and extending radially outward from the capsule body in the axial direction, It has, The transmitting antenna is mounted on the mounting flange in an annular manner, extending in the circumferential direction of the axis when viewed from the axial direction. The mounting flange is formed in multiple locations spaced apart in the circumferential direction and has an antenna hole through which the transmitting antenna can be inserted. The transmitting antenna is inserted into a plurality of antenna holes and attached to the antenna mounting member by being wrapped around the antenna mounting member and woven in a spiral shape extending in the circumferential direction, in a telemeter.

5. The aforementioned transmitter capsule is The capsule body further includes bolts for fastening the antenna mounting member, The telemeter according to claim 3 or 4, wherein the antenna mounting member has a collar inside through which the bolt is inserted.

6. The telemeter according to claim 1 or 2, wherein the mounting flange is formed in multiple locations at intervals in the circumferential direction and has an antenna hole through which the transmitting antenna can be inserted.

7. The telemeter according to any one of claims 1 to 4, further comprising a power supply capsule having the same configuration as the transmitter capsule and containing a power supply for supplying power to the transmitter.

8. The telemeter according to any one of claims 1 to 4, further comprising a receiving antenna positioned on the stationary side of the rotating machine at a distance of 90 mm to 110 mm from the transmitting antenna.

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