Acoustic wave guide rod of gas turbine

Abstract

The utility model discloses a gas turbine acoustic wave guide rod which comprises a rod body, the rod body is provided with a first end and a second end, the first end is used for being installed on the outer surface of a turbine cylinder of a gas turbine, the second end is provided with an installation cavity, and the installation cavity is used for installing an acoustic emission sensor; and the rod cap is provided with a placing groove and a mounting groove, the placing groove is used for mounting the signal amplifier, and the first end is arranged in the mounting groove. The rod body is arranged, the first end is directly connected with the turbine air cylinder, sound waves generated when the turbine air cylinder works can be transmitted to the second end along the first end, the sound waves are monitored by the sound emission sensor in the installation cavity when transmitted to the second end, and then whether the working state of the turbine air cylinder is safe or not is judged; and although the rod body is directly connected with the turbine air cylinder, the rod body has a certain length, and a large amount of heat generated when the turbine air cylinder works can be lost in the transfer process along the rod body, so that the second end of the rod body can be ensured to have a relatively low temperature, and a good working environment is provided for the acoustic emission sensor.

Description

Technical Field

[0001] This application relates to the field of gas turbines, and particularly to a gas turbine acoustic waveguide rod. Background Art

[0002] In the field of gas turbines, in order to ensure the safe operation of gas turbines, acoustic emission technology can be used to perform real-time safety monitoring on gas turbines. Among them, acoustic emission technology uses acoustic emission sensors to monitor gas turbines. For example, acoustic emission sensors can be installed on the outer surfaces of the compressor and turbine cylinders to monitor the acoustic emission data of the compressor and turbine cylinders, and then judge whether the gas turbine is operating safely based on the monitored acoustic emission data.

[0003] However, the operating temperature of the vast majority of acoustic emission sensors cannot exceed 200°C. For the turbine cylinder of a gas turbine, the operating temperature on its surface is generally not lower than 300°C, exceeding the upper limit of the operating temperature of the acoustic emission sensor. Therefore, it cannot be directly installed on the surface of the turbine cylinder. Utility Model Content

[0004] This application proposes a gas turbine acoustic waveguide rod, aiming to solve the problem in the prior art that the operating temperature of the turbine cylinder of a gas turbine exceeds the operating temperature of the acoustic emission sensor, and the acoustic emission sensor cannot be directly installed on the surface of the turbine cylinder.

[0005] In an embodiment of this application, a gas turbine acoustic waveguide rod is proposed, including:

[0006] A rod body, the rod body has a first end and a second end, the first end is used to be installed on the outer surface of the turbine cylinder of the gas turbine, and the second end is provided with an installation cavity for installing an acoustic emission sensor;

[0007] A rod cap, the rod cap is provided with a placement groove and an installation groove, the placement groove is used to install a signal amplifier, and the first end is arranged in the installation groove.

[0008] In an embodiment of this application, the rod body is a straight rod, and the installation cavity is formed by recessing from the end face of the second end along the axial direction of the rod body towards the first end.

[0009] In an embodiment of this application, the outer surface of the first end is provided with an external thread;

[0010] The outer side wall of the rod cap is provided with a convex block, the inside of the convex block is provided with the installation groove, and the inner wall of the installation groove is provided with an internal thread matching the external thread.

[0011] In an embodiment of this application, the signal acquisition end of the acoustic emission sensor is arranged in contact with the inner bottom wall of the installation cavity;

[0012] An asbestos gasket is provided in the installation groove. One end of the asbestos gasket is attached to the inner top wall of the installation groove, and the other end is used to be attached to the acoustic emission sensor.

[0013] In an embodiment of the present application, a first opening is provided on the outer side wall of the first end, and the first opening communicates with the installation cavity.

[0014] In an embodiment of the present application, a plurality of holes are provided on the outer side wall of the rod cap, and the plurality of holes all communicate with the installation groove.

[0015] In an embodiment of the present application, notches are provided on the two opposite inner side walls in the installation groove, and the two notches both communicate with the outer side wall of the rod cap.

[0016] In an embodiment of the present application, a diameter-reduced section is provided on the rod body. The diameter-reduced section is provided at a position on the rod body close to the first end, and the diameter of the diameter-reduced section is smaller than the diameters of the rod body at both ends of the diameter-reduced section.

[0017] In an embodiment of the present application, by providing the rod body, the first end of the rod body is directly connected to the turbine cylinder. The sound waves generated when the turbine cylinder works can propagate along the first end to the second end. When transmitted to the second end, they can be monitored by the acoustic emission sensor in the installation cavity. After the acoustic emission sensor monitors the acoustic wave signal of the turbine cylinder, it can transmit the acoustic wave signal to the signal amplifier, and based on the amplified acoustic wave signal, it can be judged whether the working state of the turbine cylinder is safe; in addition, although the rod body is directly connected to the turbine cylinder, the rod body has a certain length, and a large amount of heat will be lost during the process of the heat generated when the turbine cylinder works conducting from the first end to the second end along the rod body, so as to ensure that the second end of the rod body has a lower temperature and provide a good working environment for the acoustic emission sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0019] Figure 1 It is a schematic structural diagram of a gas turbine acoustic waveguide rod in an embodiment of the present application;

[0020] Figure 2 It is a sectional view of the rod body of a gas turbine acoustic waveguide rod in an embodiment of the present application;

[0021] Figure 3This is a sectional view of the rod cap of the acoustic waveguide rod of a gas turbine in an embodiment of the present application.

[0022] Description of reference numerals:

[0023] 100 - rod body, 110 - first end, 120 - second end, 121 - installation cavity, 122 - external thread, 130 - diameter reduction section, 200 - rod cap, 210 - placement groove, 220 - convex block, 221 - installation groove, 222 - internal thread, 230 - hole, 240 - notch.

[0024] The realization of the purpose, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0025] Next, the technical solutions in the embodiments of the present application will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0026] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present application, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0027] In addition, if there are descriptions such as "first", "second", etc. involved in the embodiments of the present application, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present application.

[0028] As Figure 1 shown, in the embodiment of the present application, the gas turbine acoustic waveguide rod includes:

[0029] A rod body 100, the rod body 100 has a first end 110 and a second end 120, the first end 110 is used for installing on the outer surface of the turbine cylinder of the gas turbine, and the second end 120 is provided with an installation cavity 121, and the installation cavity 121 is used for installing an acoustic emission sensor;

[0030] A rod cap 200 is provided with a placement groove 210 and a mounting groove 221. The placement groove 210 is used for installing a signal amplifier, and the first end 110 is disposed in the mounting groove 221.

[0031] In an embodiment of the present application, the material of the rod body 100 can be selected as a material with poor heat conduction effect and good sound conduction effect. The poor heat conduction effect can reduce the efficiency of the working heat radiation of the turbine cylinder conducting along the first end 110 of the rod body 100 to the second end 120, and avoid the temperature at the second end 120 exceeding the operating temperature of the acoustic emission sensor.

[0032] In Figure 1 In the shown orientation, the lower end of the rod body 100 is the first end 110, and the first end 110 is used for installing on the surface of the turbine cylinder of the gas turbine. For example, in an embodiment, the first end 110 can be welded to the surface of the turbine cylinder by welding. The other end of the rod body 100 is the second end 120. As Figure 1 、 Figure 2 shown, the upper end of the rod body 100 is the second end 120, and the second end 120 has a hollow mounting cavity 121 inside, and the mounting cavity 121 is used for installing an acoustic emission sensor.

[0033] As Figure 1 and Figure 3 shown, in an embodiment of the present application, the placement groove 210 is provided at the top of the rod cap 200, the mounting groove 221 is provided at the bottom of the rod cap 200, the second end 120 of the rod body 100 is installed in the mounting groove 221, a signal amplifier is installed in the placement groove 210, and the signal amplifier is electrically connected to the acoustic emission sensor.

[0034] The first end 110 of the rod body 100 is directly connected to the turbine cylinder, and the material of the rod body 100 can be a material with high sound transmission. Therefore, the sound waves generated when the turbine cylinder works can propagate along the first end 110 to the second end 120. When the sound waves generated by the turbine cylinder are transmitted to the second end 120, they can be monitored by the acoustic emission sensor in the mounting cavity 121. After the acoustic emission sensor monitors the acoustic wave signal of the turbine cylinder, it can transmit the acoustic wave signal to the signal amplifier, and based on the amplified acoustic wave signal, it can be judged whether the working state of the turbine cylinder is safe. In addition, although the rod body 100 is directly connected to the turbine cylinder, due to the rod body 100 having a certain length and the material of the rod body 100 can be a material with low heat conduction, the heat generated when the turbine cylinder works is not only not easy to conduct along the rod body 100 from the first end 110 to the second end 120, but also a large amount of heat will be lost during the conduction process, so as to ensure that the second end 120 of the rod body 100 has a lower temperature and provides a good working environment for the acoustic emission sensor.

[0035] As Figure 1 shown, in the embodiment of the present application, the rod body 100 is a straight rod, and the installation cavity 121 is recessed from the end face of the second end 120 along the axial direction of the rod body 100 towards the first end 110. Among them, setting the rod body 100 in a straight rod shape can minimize the loss of sound waves generated during the operation of the turbine cylinder during transmission in the rod body 100. The installation cavity 121 is arranged along the axial direction of the rod body 100 from the surface of the second installation end, and the acoustic emission sensor is arranged therein. On the one hand, the sound waves generated during the operation of the turbine cylinder can be transmitted along the rod body 100 to the acoustic emission sensor. In addition, other sound waves other than this can be avoided from affecting the acoustic emission sensor; on the other hand, the extending direction of the installation cavity 121 is consistent with the axial direction of the rod body 100. After the sound waves of the turbine cylinder are transmitted from the first end 110 of the rod body 100 to the second end 120, they can be directly monitored by the acoustic emission sensor, ensuring that the acoustic emission sensor has a good monitoring effect.

[0036] As Figure 2 、 Figure 3 shown, in the embodiment of the present application, an external thread 122 is provided on the outer surface of the first end 110; a convex block 220 is provided on the outer side wall of the rod cap 200, an installation groove 221 is provided inside the convex block 220, and an internal thread 222 matching the external thread 122 is provided on the inner wall of the installation groove 221.

[0037] There are various connection methods between the rod body 100 and the rod cap 200. For example, in the embodiment of the present application, the bottom of the rod cap 200 is connected to the second end 120. A cylindrical convex block 220 is provided at the bottom of the rod cap 200, and an installation groove 221 is provided inside the convex block 220. An internal thread 222 is provided on the inner side wall of the installation groove 221, and an external thread 122 is provided on the outer side wall of the second end 120, so that the second end 120 can be threadedly connected to the installation groove 221 inside the convex block 220. In addition, in other embodiments, an installation groove 221 can also be directly provided at the bottom of the rod cap 200, that is, without additionally providing a convex block 220, and the installation groove 221 is directly provided on the bottom wall of the rod cap 200.

[0038] As Figure 1 shown, in the embodiment of the present application, the signal acquisition end of the acoustic emission sensor is arranged in close contact with the inner bottom wall of the installation cavity 121; an asbestos gasket is provided in the installation groove 221, one end of the asbestos gasket is in close contact with the inner top wall of the installation groove 221, and the other end is used to be in close contact with the acoustic emission sensor. Among them, when installing the acoustic emission sensor, the signal acquisition end of the acoustic emission sensor is closely attached to the inner bottom wall of the installation cavity 121, so that when the sound waves generated during the operation of the turbine cylinder propagate along the axial direction of the rod body 100, they can be directly monitored by the acoustic emission sensor through the inner bottom wall of the installation cavity 121.

[0039] In addition, after the second end 120 of the rod body 100 is installed in the installation groove 221, asbestos gaskets are filled between the acoustic emission sensor and the inner top wall bracket of the installation groove 221. On the one hand, the acoustic emission sensor can be pressed against the inner bottom wall of the installation cavity 121 to maintain a tightly fitting state. On the other hand, the sound waves transmitted from the rod cap 200 can be isolated as much as possible to avoid interfering with the acoustic emission sensor.

[0040] As Figure 1 , Figure 2 shown, in the embodiment of the present application, a first opening is provided on the outer side wall of the first end 110, and the first opening communicates with the installation cavity 121. Providing an opening communicating with the installation cavity 121 on the outer side wall of the first end 110 can provide an installation opening for the cable of the acoustic emission sensor.

[0041] As Figure 1 shown, in the embodiment of the present application, a plurality of holes 230 are provided on the outer side wall of the rod cap 200, and the plurality of holes 230 all communicate with the installation groove 221. In the embodiment of the present application, the rod cap 200 is generally in the shape of a rectangular parallelepiped frame, and the rectangular parallelepiped-shaped frame encloses a rectangular parallelepiped-shaped placement groove 210 for installing a signal amplifier. In order to fix the signal amplifier, a plurality of holes 230 can be provided on each side wall of the rectangular parallelepiped-shaped frame. When the signal amplifier is arranged in the placement groove 210, the signal amplifier can be firmly fixed in the placement groove 210 by means of iron wires or metal straps through the holes 230 on each side wall.

[0042] Continue to refer to Figure 1 , in the embodiment of the present application, notches 240 are provided on the two opposite inner side walls of the installation groove 221, and the two notches 240 both communicate with the outer side wall of the rod cap 200. In order to facilitate the routing of the cable of the signal amplifier, notches 240 can be provided on the two opposite side walls of the frame. Different from the holes 230, the holes 230 only penetrate through the side wall of the rod cap 200 from the outside of the placement groove 210 to communicate with the placement groove 210, while the notches 240 not only penetrate through the side wall of the rod cap 200 from the outside of the placement groove 210 to communicate with the placement groove 210, but also penetrate through the side wall of the rod cap 200 in the depth direction of the placement groove 210. Therefore, when routing the cable related to the signal amplifier, it can be directly arranged from the notch of the placement groove 210 into the notch 240, which is convenient for routing.

[0043] Continue to refer to Figure 1, in the embodiment of the present application, a diameter-reduced section 130 is provided on the rod body 100. The diameter-reduced section 130 is provided at a position of the rod body 100 close to the first end 110. The diameter of the diameter-reduced section 130 is smaller than the diameters of the rod body 100 at both ends of the diameter-reduced section 130. Among them, as Figure 1 shown, the diameter-reduced section 130 is provided at a position close to the first end 110 and is directly formed on the rod body 100, and its outer diameter is smaller than that of other positions. After the first end 110 is connected to the turbine cylinder, the heat of the turbine cylinder is transmitted from the first end 110 to the second end 120. When it is transmitted to the diameter-reduced section 130, due to the smaller diameter of the diameter-reduced section 130, the heat transfer to the second end 120 can be reduced, and the second end 120 can be maintained at a lower temperature.

[0044] In the embodiment of the present application, by providing the rod body 100, the first end 110 of the rod body 100 is directly connected to the turbine cylinder. The sound waves generated when the turbine cylinder works can propagate from the first end 110 to the second end 120. When transmitted to the second end 120, they can be monitored by the acoustic emission sensor in the installation cavity 121. After the acoustic emission sensor monitors the acoustic wave signal of the turbine cylinder, it can transmit the acoustic wave signal to the signal amplifier, and based on the amplified acoustic wave signal, it can be determined whether the working state of the turbine cylinder is safe; in addition, although the rod body 100 is directly connected to the turbine cylinder, the rod body 100 has a certain length, and a large amount of heat will be lost during the process of the heat generated when the turbine cylinder works being conducted from the first end 110 to the second end 120 along the rod body 100, so that the second end 120 of the rod body 100 can be ensured to have a lower temperature, providing a good working environment for the acoustic emission sensor.

[0045] The above are only the optional embodiments of the present application, and do not limit the patent scope of the present application accordingly. Any equivalent structural transformation made by using the content of the specification and drawings of the present application under the inventive concept of the present application, or any direct / indirect application in other related technical fields, is included in the patent protection scope of the present application.

Claims

1. A gas turbine acoustic waveguide, characterized in that: include: A rod body, the rod body having a first end and a second end, the first end being used to be mounted on the outer surface of a turbine cylinder of a gas turbine, and the second end being provided with a mounting cavity, the mounting cavity being used to mount an acoustic emission sensor; The rod cap is provided with a placement groove and an installation groove, the placement groove is used to install the signal amplifier, and the first end is arranged in the installation groove.

2. The gas turbine acoustic waveguide rod according to claim 1, characterized in that: The rod shaft is a straight rod, and the installation cavity is formed by being recessed from the end surface of the second end along the axial direction of the rod shaft toward the first end.

3. The gas turbine acoustic waveguide rod according to claim 2, characterized in that: The outer surface of the first end is provided with an external thread; The outer wall of the rod cap is provided with a protrusion, the interior of the protrusion is provided with the installation groove, and the inner wall of the installation groove is provided with an internal thread matching the external thread.

4. The gas turbine acoustic waveguide rod according to claim 3, characterized in that: The signal collection end of the acoustic emission sensor is arranged in close contact with the inner bottom wall of the installation cavity; An asbestos gasket is arranged in the installation groove, one end of the asbestos gasket is fitted with the inner top wall of the installation groove, and the other end is used to fit with the acoustic emission sensor.

5. The gas turbine acoustic waveguide according to claim 1, characterized in that: The outer side wall of the first end is provided with a first opening, and the first opening is communicated with the installation cavity.

6. The gas turbine acoustic waveguide according to claim 1, characterized in that: A plurality of holes are arranged on the outer side wall of the rod cap, and the plurality of holes are all communicated with the mounting groove.

7. The gas turbine acoustic waveguide according to claim 1, characterized in that: Two opposite inner side walls in the installation groove are both provided with notches, and the two notches are both communicated with the outer side wall of the rod cap.

8. The gas turbine acoustic waveguide according to claim 1, characterized in that: The shaft is provided with a diameter-reducing section, which is arranged at a position of the shaft close to the first end, and a diameter of the diameter-reducing section is smaller than a diameter of the shaft at both ends of the diameter-reducing section.

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