Turbine defect composite voiceprint diagnosis device

Abstract

The invention discloses a steam turbine defect composite voiceprint diagnosis device, and particularly relates to the technical field of steam turbine diagnosis, the steam turbine defect composite voiceprint diagnosis device comprises a track body, a diagnosis assembly, a mounting and dismounting mechanism and a telescopic assembly; the diagnosis assembly is arranged on the track body; the diagnosis assembly comprises a moving plate, a base, a rotating arm A, a connecting arm, a rotating arm B, a fixed plate, a voiceprint detector, a vibration sensor and a camera body; the moving plate is slidably arranged on the track body through the driving assembly. The base is connected with the moving plate through the mounting and dismounting mechanism; the rotating arm A is rotationally connected with the base through a rotating motor A; the connecting arm is arranged above the rotating arm A; the rotating arm B is rotationally connected with the connecting arm through a rotating motor B; the fixed plate is arranged on one side of the rotating arm B; the voiceprint detector, the vibration sensor and the camera body are all arranged on the fixing plate; the device is reasonable in structural design, capable of achieving efficient, continuous and automatic monitoring, comprehensive in coverage and low in use cost, and the diagnosis accuracy is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of steam turbine diagnostic technology, and more specifically, to a composite acoustic signature diagnostic device for steam turbine defects. Background Technology

[0002] A steam turbine, also known as a steam engine, is a rotary steam power unit. It uses high-temperature, high-pressure steam to accelerate through fixed nozzles and then spray onto blades, causing a rotor equipped with rows of blades to rotate and perform work. Steam turbines are the main equipment in modern thermal power plants, and are also used in the metallurgical industry, chemical industry, and ship propulsion systems.

[0003] Waste-to-energy incineration, as an important means of resource utilization of urban solid waste, has been widely used in recent years. As a key piece of equipment in the waste-to-energy incineration system, the operation stability and safety of the steam turbine have a significant impact on the efficiency and lifespan of the entire system. Traditional steam turbine fault detection mainly relies on regular manual inspections, vibration analysis, infrared thermography, and other methods. However, these methods suffer from problems such as untimely response, incomplete coverage, high cost, and significant interference from human factors. Once a fault occurs during the operation of the steam turbine, such as bearing wear, rotor imbalance, foreign object intrusion, or blade cracks, traditional detection methods are difficult to achieve efficient, continuous, and automated monitoring. Summary of the Invention

[0004] To overcome the aforementioned deficiencies of the prior art, this invention provides a composite acoustic signature diagnostic device for steam turbine defects. The technical problem to be solved by this invention is that traditional steam turbine fault detection mainly relies on regular manual inspections, vibration analysis, infrared thermography, and other methods. However, these methods suffer from problems such as untimely response, incomplete coverage, high cost, and significant interference from human factors. During the operation of a steam turbine, once a fault occurs, such as bearing wear, rotor imbalance, foreign object intrusion, or blade cracks, traditional detection methods can hardly achieve efficient, continuous, and automated monitoring.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a composite acoustic signature diagnostic device for steam turbine defects, comprising a track body, a diagnostic component, an installation / removal mechanism, a telescopic component, and a drive component; the track body is arranged around the steam turbine, and the track body has a T-shaped cross-section that is larger at the top and smaller at the bottom; the diagnostic component is arranged on the track body; the diagnostic component includes a moving plate, a base, a rotating arm A, a connecting arm, a rotating arm B, a fixed plate, an acoustic signature detector for collecting steam turbine sound data, a vibration sensor for measuring steam turbine vibration, and a camera body for recording steam turbine surface image information; The movable plate is slidably mounted on the track body via a drive assembly; the base is connected to the movable plate via an installation and removal mechanism, and the base is equipped with a control and processing unit as well as a power supply and communication module; the rotating arm A is rotatably connected to the base via a rotating motor A; the connecting arm is arranged above the rotating arm A; the rotating arm B is rotatably connected to the connecting arm via a rotating motor B; the fixed plate is arranged on one side of the rotating arm B, and both the fixed plate and the rotating arm A are connected to the rotating arm B and the connecting arm respectively via telescopic assemblies; the voiceprint detector, vibration sensor, and camera body are all located on the side of the fixed plate away from the rotating arm B.

[0006] As a further embodiment of the present invention: the driving assembly includes a connecting frame, a horizontal driving wheel, and a vertical driving wheel; at least two of the connecting frames are symmetrically fixed on the side of the movable plate away from the base; the horizontal driving wheel is rotatably connected to the horizontal plate of the connecting frame through a horizontal driving rod, and the horizontal driving wheel is in rolling contact with the vertical surface of the track body; the vertical driving wheel is rotatably connected to the vertical plate of the connecting frame through a vertical driving rod, and the vertical driving wheel is in rolling contact with the horizontal surface of the track body.

[0007] As a further embodiment of the present invention: the telescopic assembly includes a fixed cylinder, a telescopic cylinder A, a telescopic cylinder B, a telescopic cylinder C, a movable groove A, a gear A, a rack A, a movable groove B, a gear B, and a rack B; the two fixed cylinders are respectively fixedly connected to the rotating arm A and the rotating arm B; the telescopic cylinder A is movably inserted into the fixed cylinder; the telescopic cylinder B is movably inserted into the telescopic cylinder A; the telescopic cylinder C is movably inserted into the telescopic cylinder B and fixedly connected to a fixed plate or the rotating arm B; two movable grooves A are symmetrically opened on both sides of the telescopic cylinder A; the gear A is rotatably disposed in the movable groove A via a rotating shaft A; two racks A are symmetrically arranged on both sides of the gear A and mesh with the gear A and rotate, and the two racks A are respectively fixedly connected to the inner side of the fixed cylinder and the outer side of the telescopic cylinder B; two movable grooves B are symmetrically opened on both sides of the telescopic cylinder B; the gear B is rotatably disposed in the movable groove B via a rotating shaft B; two racks B are symmetrically arranged on both sides of the gear B and mesh with the gear B and rotate, and the two racks B are respectively fixedly connected to the inner side of the telescopic cylinder A and the outer side of the telescopic cylinder C.

[0008] As a further embodiment of the present invention: the telescopic assembly further includes a servo motor, a connecting plate, and a screw; the servo motor is fixed inside the fixed cylinder via a motor mount; the connecting plate is fixed on the bottom surface of the telescopic cylinder A; the screw is screwed onto the connecting plate, and one end of the screw is fixedly connected to the output end of the servo motor.

[0009] As a further embodiment of the present invention: the installation and removal mechanism includes a positioning component; the positioning component includes a fixed seat, a positioning groove and a positioning block; the fixed seat is fixedly mounted on the movable plate; the fixed seat has a positioning groove on the side away from the movable plate; the positioning block is inserted into the positioning groove and fixedly connected to the base.

[0010] As a further embodiment of the present invention: the installation and removal mechanism further includes a locking component; the locking component includes a sliding groove, a hollow groove, a locking groove, a sliding block, a sliding rod, a spring A, and a locking block; at least one sliding groove is provided on the fixed base; at least one hollow groove is provided in the positioning groove; at least one locking groove is provided on the positioning block; the sliding block is slidably inserted into the sliding groove; one end of the sliding rod is fixedly connected to the sliding block, and the other end extends through the sliding groove into the hollow groove; the spring A is sleeved on the sliding rod, and both ends of the spring A are fixedly connected to the inner wall of the sliding groove and the sliding block, respectively; the locking block is slidably inserted into the hollow groove and fixedly connected to the other end of the sliding rod, and the locking block is inserted into the locking groove.

[0011] As a further aspect of the present invention: the sliding block is a right-angled trapezoidal structure with a larger upper part and a smaller lower part, and the inclined surface of the sliding block is set away from the direction of the sliding rod.

[0012] As a further embodiment of the present invention: the installation and dismantling mechanism further includes a reinforcing component; the reinforcing component includes a fixed block, a spring B, a movable cylinder, and a square block; the fixed block is sleeved on a fixed base; the spring B is sleeved on the fixed base, and one end of the spring B is fixedly connected to the fixed block; the elastic strength of the spring B is greater than the elastic strength of the spring A; the movable cylinder is slidably disposed on the fixed block; the square block is fixedly disposed on the inner wall of the movable cylinder.

[0013] As a further aspect of the present invention: the longitudinal section of the movable cylinder is an L-shaped structure with a larger upper section and a smaller lower section.

[0014] As a further aspect of the present invention: the longitudinal section of the square block is a right-angled triangular structure, and the inclined surface of the square block is in contact with the inclined surface of the sliding block.

[0015] The beneficial effects of this invention are as follows:

[0016] 1. This invention, by setting up a diagnostic component and a drive component, allows the control and processing unit to first complete initialization positioning and self-test operations after the device is powered on. Subsequently, by controlling the horizontal and vertical drive wheels, the horizontal drive wheel rotates with the horizontal plate of the connecting frame via the horizontal drive rod, and the vertical drive wheel rotates with the vertical plate of the connecting frame via the vertical drive rod. Following a preset path, the diagnostic component slowly moves along the outer track of the turbine. When the diagnostic component reaches the designated detection position, the horizontal and vertical drive wheels automatically stop. At this time, the telescopic component begins to operate, slowly extending the acoustic signature detector mounted on the fixed plate until it is close to the turbine casing. To improve the signal-to-noise ratio and accuracy of acoustic signature acquisition, the acoustic signature detector begins high-sensitivity multi-band acoustic signature signal acquisition. Simultaneously, the vibration sensor detects vibration in the current detection area, and the camera body also starts image acquisition, recording the operating status and appearance characteristics of the turbine surface. The acquired acoustic signature, image, and temperature multimodal data are immediately processed by the control and processing unit through edge computing, including noise filtering, feature extraction, and preliminary judgment. The built-in diagnostic model identifies and analyzes the acoustic signature features, compares them with historical normal data, and performs cross-validation based on temperature anomalies and image features to intelligently determine whether there are signs of a fault. After the current area is inspected, the telescopic component automatically retracts the acoustic signature detector. By controlling the horizontal and vertical drive wheels, the device continues to move to the next inspection position, repeating this cycle until a comprehensive inspection of the entire steam turbine is completed. The inspection results are analyzed and processed, then uploaded to the remote control platform in real time via the communication module and recorded locally. If an anomaly is detected, the system automatically issues an alarm and generates a maintenance suggestion report. Even when not in operation, the device can periodically perform self-checks and automatically optimize the inspection path and strategy to adapt to continuous operation and intelligent maintenance requirements in complex environments. Compared with existing technologies, this invention has a reasonable structural design, enabling efficient, continuous, and automated monitoring. It not only provides comprehensive coverage and lower operating costs but also significantly improves diagnostic accuracy.

[0017] 2. This invention, by setting up a telescopic component, activates a servo motor, causing the output shaft of the servo motor to drive a screw to rotate. The screw is threadedly connected to a connecting plate, causing the connecting plate to move the telescopic cylinder A within the fixed cylinder. This causes gear A to mesh and rotate with rack A fixed on the fixed cylinder. Gear A then moves through rotating shaft A within movable groove A, meshing and rotating with rack A fixed on telescopic cylinder B. This causes telescopic cylinder B to move within telescopic cylinder A. Gear B then meshes and rotates with rack B fixed on telescopic cylinder A, rotating through rotating shaft B within movable groove B. Finally, gear B meshes and rotates with rack B fixed on telescopic cylinder C, causing telescopic cylinder C to move within telescopic cylinder B. Through the cooperation between telescopic cylinders A, B, and C, multi-stage telescopic extension and retraction of the telescopic component can be achieved. This not only reduces the overall size of the invention but also increases the extension and retraction stroke of the telescopic component, improving the diagnostic effect on steam turbines.

[0018] 3. By setting up a positioning component, the present invention allows the positioning block to slide upward in the positioning groove by moving the diagnostic component upward until the positioning block moves out of the positioning groove. Then, the positioning block is inserted into the positioning groove and the bottom surface of the positioning block contacts the bottom wall of the positioning groove. This allows for quick and convenient installation or removal of the diagnostic component, greatly improving the maintenance efficiency and diagnostic effect of the diagnostic component.

[0019] 4. This invention, by setting a locking component and reinforcing the component, causes spring A to no longer be under force and begin to stretch, allowing the sliding block to slide within the sliding groove. This causes the sliding rod to move, and the locking block to slide within the empty groove and the locking groove until the locking block moves out of the locking groove. Then, the reinforcing component causes the sliding block to slide in the opposite direction within the sliding groove, causing the sliding rod to move in the opposite direction, and the locking block to slide in the opposite direction within the empty groove and the locking groove. This causes spring A to contract under force until spring A returns to its original shape. This makes the position of the positioning block within the positioning groove more stable, thereby improving the stability of the diagnostic component.

[0020] 5. This invention, by setting up a reinforcing component, moves the movable cylinder downwards, causing the square block to move downwards and spring B to contract under force. At this time, the inclined surface of the square block no longer presses against the inclined surface of the sliding block. By releasing the movable cylinder, under the elastic force of spring B, the movable cylinder will move the square block upwards. Since the elastic strength of spring B is greater than that of spring A, the inclined surface of the square block will press against the inclined surface of the sliding block, thereby reinforcing the position of the locking component. The whole process is simple, convenient, and easy to operate. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a cross-sectional view of the overall structure of the present invention;

[0023] Figure 3 This is a schematic diagram of the diagnostic component of the present invention;

[0024] Figure 4 This is a schematic diagram showing the disassembled telescopic component of the present invention;

[0025] Figure 5 This is a cross-sectional view of the telescopic component of the present invention in another state;

[0026] Figure 6 This is a sectional view of the disassembly mechanism of the present invention.

[0027] Figure 7 For the present invention Figure 2 Enlarged view of point A in the middle;

[0028] Figure 8 For the present invention Figure 2 Enlarged view of point B in the middle;

[0029] Figure 9 For the present invention Figure 2 Enlarged diagram of point C in the middle.

[0030] In the picture:

[0031] 1. Track body; 2. Diagnostic components; 3. Installation and removal mechanism; 4. Telescopic components; 5. Positioning components; 6. Locking components; 7. Reinforcing components; 8. Drive components;

[0032] 201. Moving plate; 202. Base; 203. Rotating arm A; 204. Connecting arm; 205. Rotating arm B; 206. Fixing plate; 207. Voiceprint detector; 208. Vibration sensor; 209. Camera body;

[0033] 401. Fixed cylinder; 402. Telescopic cylinder A; 403. Telescopic cylinder B; 404. Telescopic cylinder C; 405. Movable groove A; 406. Gear A; 407. Rack A; 408. Movable groove B; 409. Gear B; 410. Rack B; 411. Servo motor; 412. Connecting plate; 413. Screw;

[0034] 501. Fixing base; 502. Positioning groove; 503. Positioning block;

[0035] 601. Sliding groove; 602. Empty groove; 603. Locking groove; 604. Sliding block; 605. Sliding rod; 606. Spring A; 607. Locking block;

[0036] 701. Fixed block; 702. Spring B; 703. Movable cylinder; 704. Square block;

[0037] 801. Connecting frame; 802. Horizontal drive wheel; 803. Vertical drive wheel. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] like Figures 1 to 9 As shown, this invention provides a composite acoustic signature diagnostic device for turbine defects, including a track body 1, a diagnostic component 2, an installation / removal mechanism 3, a telescopic component 4, and a drive component 8. The track body 1 is arranged around the turbine, and its cross-section is a T-shaped structure with a larger upper section and a smaller lower section. The diagnostic component 2 is arranged on the track body 1. The diagnostic component 2 includes a movable plate 201, a base 202, a rotating arm A 203, a connecting arm 204, a rotating arm B 205, a fixed plate 206, an acoustic signature detector 207 for collecting turbine sound data, a vibration sensor 208 for measuring turbine vibration, and a camera body 209 for recording turbine surface image information. The movable plate 201 is slidably mounted on the track body 1 via the drive component 8. On the track body 1; the base 202 is connected to the moving plate 201 via the installation and removal mechanism 3, and the base 202 is equipped with a control and processing unit as well as a power supply and communication module; the rotating arm A203 is rotatably connected to the base 202 via the rotating motor A; the connecting arm 204 is arranged above the rotating arm A203; the rotating arm B205 is rotatably connected to the connecting arm 204 via the rotating motor B; the fixed plate 206 is arranged on one side of the rotating arm B205, and both the fixed plate 206 and the rotating arm A203 are connected to the rotating arm B205 and the connecting arm 204 respectively via the telescopic component 4; the voiceprint detector 207, the vibration sensor 208 and the camera body 209 are all arranged on the side of the fixed plate 206 away from the rotating arm B205;

[0040] The drive assembly 8 includes a connecting frame 801, a horizontal drive wheel 802, and a vertical drive wheel 803. Six connecting frames 801 are symmetrically fixed in a linear array on the side of the movable plate 201 away from the base 202. The horizontal drive wheel 802 is rotatably connected to the horizontal plate of the connecting frame 801 through a horizontal drive rod, and the horizontal drive wheel 802 is in rolling contact with the vertical surface of the track body 1. The vertical drive wheel 803 is rotatably connected to the vertical plate of the connecting frame 801 through a vertical drive rod, and the vertical drive wheel 803 is in rolling contact with the horizontal surface of the track body 1. The horizontal drive wheel 802 and the vertical drive wheel 803 can automatically adapt to the shape of the track body 1.

[0041] This invention, by setting up a diagnostic component 2 and a drive component 8, allows the control and processing unit to first complete initialization positioning and self-test operations after the device is powered on. Subsequently, by controlling the horizontal drive wheel 802 and the vertical drive wheel 803, the horizontal drive wheel 802 rotates via a horizontal drive rod and the horizontal plate of the connecting frame 801, while the vertical drive wheel 803 rotates via a vertical drive rod and the vertical plate of the connecting frame 801. Following a preset path, the diagnostic component 2 slowly moves along the outer track of the turbine. When the diagnostic component 2 reaches the designated detection position, the horizontal drive wheel 802 and the vertical drive wheel 803 automatically stop. At this time, the telescopic component 4 begins to operate, slowly extending the acoustic signature detector 207 mounted on the fixed plate 206, so that it is in contact with... To improve the signal-to-noise ratio and accuracy of acoustic signature acquisition, the acoustic signature detector 207 begins high-sensitivity multi-band acoustic signature signal acquisition while the vibration sensor 208 simultaneously detects vibration in the current detection area. The camera body 209 simultaneously starts image acquisition to detect temperature in the detection area, recording the operating status and appearance characteristics of the turbine surface. The acquired acoustic signature, image, and temperature multimodal data are immediately processed by the control and processing unit through edge computing, including noise filtering, feature extraction, and preliminary judgment. The built-in diagnostic model is used to identify and analyze the acoustic signature features, compare them with historical normal data, and perform cross-validation based on temperature anomalies and image features to intelligently determine whether there are signs of a fault. After the current area is detected, the telescopic component 4 automatically retracts the acoustic signature detector 207. By controlling the horizontal drive wheel 802 and the vertical drive wheel 803, the device continues to move to the next detection position. This cycle continues until the entire turbine is fully inspected. The detection results are analyzed and processed, then uploaded to the remote control platform in real time via the communication module and recorded locally. If an anomaly is detected, the system automatically issues an alarm and generates a maintenance suggestion report. The device can also perform self-checks periodically when not in operation, automatically optimizing the detection path and strategy to adapt to continuous operation and intelligent maintenance requirements in complex environments. Compared with existing technologies, this invention has a reasonable structural design, enabling efficient, continuous, and automated monitoring. It not only provides comprehensive coverage and lower operating costs but also significantly improves diagnostic accuracy.

[0042] In a preferred embodiment, the telescopic assembly 4 includes a fixed cylinder 401, a telescopic cylinder A402, a telescopic cylinder B403, a telescopic cylinder C404, a movable groove A405, a gear A406, a rack A407, a movable groove B408, a gear B409, a rack B410, a servo motor 411, a connecting plate 412, and a screw 413; the two fixed cylinders 401 are fixedly connected to the rotating arm A203 and the rotating arm B205 respectively; the telescopic cylinder A402 is movably inserted through the fixed cylinder 401. 1. Telescopic cylinder B403 is movably inserted into telescopic cylinder A402; telescopic cylinder C404 is movably inserted into telescopic cylinder B403 and fixedly connected to fixed plate 206 or rotating arm B205; two movable slots A405 are symmetrically opened on both sides of telescopic cylinder A402; gear A406 is rotatably disposed in movable slot A405 via rotating shaft A; two racks A407 are symmetrically disposed on both sides of gear A406 and mesh with gear A406 for rotation, and the two racks A407 are respectively connected to fixed plate 206 or rotating arm B205. The inner side of the fixed cylinder 401 and the outer side of the telescopic cylinder B403 are fixedly connected; two movable slots B408 are symmetrically opened on both sides of the telescopic cylinder B403; the gear B409 is rotatably disposed in the movable slots B408 via the rotating shaft B; two racks B410 are symmetrically disposed on both sides of the gear B409 and mesh with the gear B409 to rotate, and the two racks B410 are fixedly connected to the inner side of the telescopic cylinder A402 and the outer side of the telescopic cylinder C404 respectively; the servo motor 411 is fixedly connected to the fixed cylinder via a motor base. Inside 401; the connecting plate 412 is fixedly connected to the bottom surface of the telescopic cylinder A402; the screw 413 is screwed onto the connecting plate 412, and one end of the screw 413 is fixedly connected to the output end of the servo motor 411; to prevent the screw 413 from falling off the threaded connection with the connecting plate 412, a limiting disc can be set at the end of the screw 413, so that the diameter of the limiting disc is larger than the diameter of the screw 413, and the height of the screw 413 is smaller than the movement dimension of the gear A406 and the rack B410.

[0043] This invention, by setting up a telescopic component 4, activates a servo motor 411, causing the output shaft of the servo motor 411 to drive the screw 413 to rotate. The screw 413 is threadedly connected to the connecting plate 412, causing the connecting plate 412 to move the telescopic cylinder A402 within the fixed cylinder 401. This causes the gear A406 to mesh and rotate with the rack A407 fixed on the fixed cylinder 401. The gear A406 then moves within the movable groove A405 via the rotating shaft A, meshing with the rack A407 fixed on the telescopic cylinder B403, thus moving the telescopic cylinder B403 within the telescopic cylinder A402. The gear B409 meshes with the rack B410 fixed on the telescopic cylinder A402, causing the gear B409 to rotate within the movable groove B408 via the rotating shaft B. This meshes with the rack B410 fixed on the telescopic cylinder C404, causing the telescopic cylinder C404 to move within the telescopic cylinder B403. Through the cooperation between the telescopic cylinders A402, B403, and C404, multi-stage telescopic extension and retraction of the telescopic assembly 4 can be achieved. This not only reduces the overall volume of the invention but also increases the extension and retraction stroke of the telescopic assembly 4, improving the diagnostic effect on the steam turbine.

[0044] As a preferred embodiment, the installation and removal mechanism 3 includes a positioning component 5; the positioning component 5 includes a fixed base 501, a positioning groove 502 and a positioning block 503; the fixed base 501 is fixedly connected to the movable plate 201; the fixed base 501 has a positioning groove 502 on the side away from the movable plate 201; the positioning block 503 is inserted into the positioning groove 502 and fixedly connected to the base 202.

[0045] This invention, by setting a positioning component 5, allows the positioning block 503 to slide upward within the positioning groove 502 by moving the diagnostic component 2 upward until the positioning block 503 moves out of the positioning groove 502. Then, the positioning block 503 is inserted into the positioning groove 502, and the bottom surface of the positioning block 503 contacts the bottom wall of the positioning groove 502. This allows for quick and convenient installation or removal of the diagnostic component 2, greatly improving the maintenance efficiency and diagnostic effect of the diagnostic component 2.

[0046] As a preferred embodiment, the installation and removal mechanism 3 further includes a locking component 6; the locking component 6 includes a sliding groove 601, a hollow groove 602, a locking groove 603, a sliding block 604, a sliding rod 605, a spring A 606, and a locking block 607; four sliding grooves 601 are evenly provided on the fixed base 501; four hollow grooves 602 are evenly provided in the positioning groove 502; four locking grooves 603 are evenly provided on the positioning block 503; the sliding block 604 slides through the sliding groove 601; one end of the sliding rod 605 is connected to the sliding block. 604 is fixedly connected, and the other end extends through the sliding groove 601 into the empty groove 602; spring A606 is sleeved on the sliding rod 605, and the two ends of spring A606 are fixedly connected to the inner wall of the sliding groove 601 and the sliding block 604 respectively; locking block 607 is slidably inserted into the empty groove 602 and fixedly connected to the other end of the sliding rod 605, and locking block 607 is inserted into the locking groove 603; the sliding block 604 is a right-angled trapezoidal structure with a larger upper part and a smaller lower part, and the inclined surface of the sliding block 604 is set away from the direction of the sliding rod 605.

[0047] This invention, by setting a locking component 6 and a reinforcing component 7, causes the spring A606 to no longer be under force and begin to stretch, allowing the sliding block 604 to slide within the sliding groove 601, causing the sliding rod 605 to move, and causing the locking block 607 to slide within the empty groove 602 and the locking groove 603 until the locking block 607 moves out of the locking groove 603. Then, the reinforcing component 7 causes the sliding block 604 to slide in the opposite direction within the sliding groove 601, causing the sliding rod 605 to move in the opposite direction, and causing the locking block 607 to slide in the opposite direction within the empty groove 602 and the locking groove 603, causing the spring A606 to contract under force until the spring A606 returns to its original shape. This facilitates a more stable position of the positioning block 503 within the positioning groove 502, thereby improving the stability of the diagnostic component 2.

[0048] As a preferred embodiment, the installation and dismantling mechanism 3 further includes a reinforcing component 7; the reinforcing component 7 includes a fixed block 701, a spring B702, a movable cylinder 703, and a square block 704; the fixed block 701 is sleeved on the fixed seat 501 and welded to the surface of the fixed seat 501; the spring B702 is sleeved on the fixed seat 501, and one end of the spring B702 is fixedly connected to the fixed block 701; the movable cylinder 703 is slidably disposed on the fixed block 701; the square block 704 is fixedly connected to the inner wall of the movable cylinder 703; the elastic strength of the spring B702 is greater than the elastic strength of the spring A606; the longitudinal section of the movable cylinder 703 is an L-shaped structure with a larger upper section and a smaller lower section; the longitudinal section of the square block 704 is a right-angled triangular structure, and the inclined surface of the square block 704 contacts the inclined surface of the sliding block 604; when the horizontal inner wall of the movable cylinder 703 contacts the right-angled surface of the sliding block 604, the spring B702 can continue to retract.

[0049] This invention, by setting up a reinforcing component 7, moves the movable cylinder 703 downward, causing the square block 704 to move downward, thus compressing the spring B702. At this time, the inclined surface of the square block 704 no longer presses against the inclined surface of the sliding block 604. By releasing the movable cylinder 703, under the elastic force of the spring B702, the movable cylinder 703 will move the square block 704 upward. Since the elastic strength of the spring B702 is greater than that of the spring A606, the inclined surface of the square block 704 will press against the inclined surface of the sliding block 604, thereby reinforcing the position of the locking component 6. The whole process is simple, convenient, and easy to operate.

[0050] Working principle of the invention: When the device is powered on, the control and processing unit first completes the initialization positioning and self-test operations. Then, by controlling the horizontal drive wheel 802 and the vertical drive wheel 803, the horizontal drive wheel 802 rotates with the horizontal plate of the connecting frame 801 via the horizontal drive rod, and the vertical drive wheel 803 rotates with the vertical plate of the connecting frame 801 via the vertical drive rod. Following a preset path, they slowly move along the outer track of the turbine via the diagnostic component 2. When the diagnostic component 2 moves to the designated detection position, the horizontal drive wheel 802 and the vertical drive wheel 803 automatically stop. At this time, the telescopic component 4 begins to operate, slowly extending the acoustic signature detector 207 mounted on the fixed plate 206, bringing it close to the turbine casing. To improve the signal-to-noise ratio and accuracy of acoustic signature acquisition, the acoustic signature detector 207 begins high-sensitivity multi-band acoustic signature signal acquisition. Simultaneously, the vibration sensor 208 performs vibration detection on the current detection area, and the camera body 209 performs temperature detection on the detection area and simultaneously starts image acquisition, recording the operating status and appearance characteristics of the turbine surface. The acquired acoustic signature, image, and temperature multimodal data are immediately processed by the control and processing unit through edge computing, including noise filtering, feature extraction, and preliminary judgment. The built-in diagnostic model is used to identify and analyze the acoustic signature features, compare them with historical normal data, and perform cross-validation based on temperature anomalies and image features to intelligently determine whether there are signs of a fault. After the current area is detected, the telescopic component 4 automatically retracts the acoustic fingerprint detector 207. By controlling the horizontal drive wheel 802 and the vertical drive wheel 803, the device continues to move to the next detection position. This cycle continues until the entire turbine is fully inspected. The detection results are analyzed and processed, and then uploaded to the remote control platform in real time through the communication module and recorded locally. If an abnormality is detected, the system automatically issues an alarm and generates a maintenance suggestion report. The device can also perform self-checks periodically when not in operation, automatically optimizing the detection path and strategy to adapt to the continuous operation and intelligent maintenance requirements in complex environments.

[0051] The specific working principle of the telescopic component 4 is as follows: By starting the servo motor 411, the output shaft of the servo motor 411 drives the screw 413 to rotate, causing the screw 413 to be threadedly connected to the connecting plate 412. This causes the connecting plate 412 to drive the telescopic cylinder A402 to move within the fixed cylinder 401, causing the gear A406 to mesh and rotate with the rack A407 fixed on the fixed cylinder 401. The gear A406 then moves within the movable groove A405 via the rotating shaft A, causing the gear A406 to mesh and rotate with the rack A407 fixed on the telescopic cylinder B403, thus causing the telescopic cylinder B403 to move within the telescopic cylinder A402. The movement causes gear B409 to mesh and rotate with rack B410 fixed on telescopic cylinder A402, causing gear B409 to rotate in movable groove B408 via rotating shaft B, causing gear B409 to mesh and rotate with rack B410 fixed on telescopic cylinder C404, causing telescopic cylinder C404 to move within telescopic cylinder B403. Through the cooperation between telescopic cylinders A402, B403 and C404, multi-stage telescopic assembly 4 can be realized, which can not only reduce the overall volume of the invention, but also increase the telescopic stroke of telescopic assembly 4 and improve the diagnostic effect of steam turbine.

[0052] When diagnostic component 2 needs to be replaced, the movable cylinder 703 is moved downwards, causing the square block 704 to move downwards. This causes the spring B702 to contract under force, while the spring A606 is no longer under force and begins to extend. This causes the sliding block 604 to move the sliding rod 605 and the locking block 607, ensuring that the inclined surface of the square block 704 is in contact with the inclined surface of the sliding block 604 until the horizontal inner wall of the movable cylinder 703 contacts the right-angle surface of the sliding block 604. At this point, the locking block 607 moves out of the locking groove 603. Subsequently, the diagnostic component 2 is moved upwards, causing the positioning block 503 to slide upwards within the positioning groove 502 until the positioning block 503 moves out of the positioning groove 502. During installation, the positioning block 503 is then moved upwards. Positioning block 503 is inserted into positioning groove 502, and the bottom surface of positioning block 503 contacts the bottom wall of positioning groove 502. At this time, the movable cylinder 703 is released. Under the elastic force of spring B702, the movable cylinder 703 will drive the square block 704 to move upward. Since the elastic strength of spring B702 is greater than that of spring A606, the inclined surface of square block 704 will press against the inclined surface of sliding block 604, causing sliding block 604 to drive sliding rod 605 and locking block 607 to move in opposite directions, causing spring A606 to be compressed until spring B702 returns to its original shape. At this time, locking block 607 is inserted into locking groove 603, making the position of positioning block 503 in positioning groove 502 more stable.

[0053] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0054] Secondly: The accompanying drawings of the embodiments disclosed in this invention only involve the structures involved in the embodiments disclosed in this invention. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this invention can be combined with each other.

[0055] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A composite acoustic signature diagnostic device for steam turbine defects, characterized in that, The system includes a track body (1), a diagnostic component (2), an installation / removal mechanism (3), a telescopic component (4), and a drive component (8). The track body (1) is located around the turbine, and its cross-section is a T-shaped structure with a larger top and a smaller bottom. The diagnostic component (2) is located on the track body (1). The diagnostic component (2) includes a moving plate (201), a base (202), a rotating arm A (203), a connecting arm (204), a rotating arm B (205), a fixed plate (206), an acoustic fingerprint detector (207) for collecting turbine sound data, a vibration sensor (208) for measuring turbine vibration, and a camera body (209) for recording turbine surface image information. The moving plate (201) is slidably mounted on the track body (1) via the drive component (8). The base (202) The base (202) is connected to the movable plate (201) via the installation and removal mechanism (3), and a control and processing unit and a power supply and communication module are provided on the base (202); the rotating arm A (203) is rotatably connected to the base (202) via the rotating motor A; the connecting arm (204) is arranged above the rotating arm A (203); the rotating arm B (205) is rotatably connected to the connecting arm (204) via the rotating motor B; the fixed plate (206) is arranged on one side of the rotating arm B (205), and the fixed plate (206) and the rotating arm A (203) are both connected to the rotating arm B (205) and the connecting arm (204) respectively via the telescopic component (4); the voiceprint detector (207), the vibration sensor (208) and the camera body (209) are all arranged on the side of the fixed plate (206) away from the rotating arm B (205).

2. The composite acoustic signature diagnostic device for turbine defects according to claim 1, characterized in that, The drive assembly (8) includes a connecting frame (801), a horizontal drive wheel (802), and a vertical drive wheel (803); at least two connecting frames (801) are symmetrically fixed on the side of the moving plate (201) away from the base (202); the horizontal drive wheel (802) is rotatably connected to the horizontal plate of the connecting frame (801) through a horizontal drive rod, and the horizontal drive wheel (802) rolls in contact with the vertical surface of the track body (1); the vertical drive wheel (803) is rotatably connected to the vertical plate of the connecting frame (801) through a vertical drive rod, and the vertical drive wheel (803) rolls in contact with the horizontal surface of the track body (1).

3. The composite acoustic signature diagnostic device for turbine defects according to claim 2, characterized in that, The telescopic assembly (4) includes a fixed cylinder (401), a telescopic cylinder A (402), a telescopic cylinder B (403), a telescopic cylinder C (404), a movable groove A (405), a gear A (406), a rack A (407), a movable groove B (408), a gear B (409), and a rack B (410); the two fixed cylinders (401) are fixedly connected to the rotating arm A (203) and the rotating arm B (205) respectively; the telescopic cylinder A (402) is movably inserted into the fixed cylinder (401); the telescopic cylinder B (403) is movably inserted into the telescopic cylinder A (402); the telescopic cylinder C (404) is movably inserted into the telescopic cylinder B (403) and fixedly connected to the fixed plate (206) or the rotating arm B (205); two movable grooves are symmetrically opened on both sides of the telescopic cylinder A (402). A (405); the gear A (406) is rotatably disposed in the movable groove A (405) via the rotating shaft A; two racks A (407) are symmetrically disposed on both sides of the gear A (406) and mesh with the gear A (406) and rotate, and the two racks A (407) are respectively fixedly connected to the inner side of the fixed cylinder (401) and the outer side of the telescopic cylinder B (403); two movable grooves B (408) are symmetrically opened on both sides of the telescopic cylinder B (403); the gear B (409) is rotatably disposed in the movable groove B (408) via the rotating shaft B; two racks B (410) are symmetrically disposed on both sides of the gear B (409) and mesh with the gear B (409) and rotate, and the two racks B (410) are respectively fixedly connected to the inner side of the telescopic cylinder A (402) and the outer side of the telescopic cylinder C (404).

4. The composite acoustic signature diagnostic device for turbine defects according to claim 3, characterized in that, The telescopic assembly (4) also includes a servo motor (411), a connecting plate (412), and a screw (413); the servo motor (411) is fixed inside the fixed cylinder (401) by a motor mount; the connecting plate (412) is fixed on the bottom surface of the telescopic cylinder A (402); the screw (413) is screwed onto the connecting plate (412), and one end of the screw (413) is fixedly connected to the output end of the servo motor (411).

5. The composite acoustic signature diagnostic device for turbine defects according to claim 4, characterized in that, The installation and removal mechanism (3) includes a positioning component (5); the positioning component (5) includes a fixed base (501), a positioning groove (502) and a positioning block (503); the fixed base (501) is fixed on the moving plate (201); the fixed base (501) has a positioning groove (502) on the side away from the moving plate (201); the positioning block (503) is inserted into the positioning groove (502) and fixedly connected to the base (202).

6. The composite acoustic signature diagnostic device for turbine defects according to claim 5, characterized in that, The installation and removal mechanism (3) further includes a locking component (6); the locking component (6) includes a sliding groove (601), a hollow groove (602), a locking groove (603), a sliding block (604), a sliding rod (605), a spring A (606), and a locking block (607); at least one sliding groove (601) is provided on the fixed base (501); at least one hollow groove (602) is provided in the positioning groove (502); at least one locking groove (603) is provided on the positioning block (503); the sliding block (604) slides through the sliding groove. Inside the moving groove (601); one end of the sliding rod (605) is fixedly connected to the sliding block (604), and the other end extends through the sliding groove (601) into the empty groove (602); the spring A (606) is sleeved on the sliding rod (605), and both ends of the spring A (606) are fixedly connected to the inner wall of the sliding groove (601) and the sliding block (604) respectively; the locking block (607) slides through the empty groove (602) and is fixedly connected to the other end of the sliding rod (605), and the locking block (607) is inserted into the locking groove (603).

7. The composite acoustic signature diagnostic device for turbine defects according to claim 6, characterized in that, The sliding block (604) is a right-angled trapezoidal structure with a larger upper part and a smaller lower part, and the inclined surface of the sliding block (604) is set away from the sliding rod (605).

8. The composite acoustic signature diagnostic device for turbine defects according to claim 7, characterized in that, The installation and removal mechanism (3) further includes a reinforcement component (7); the reinforcement component (7) includes a fixed block (701), a spring B (702), a movable cylinder (703), and a square block (704); the fixed block (701) is sleeved on the fixed seat (501); the spring B (702) is sleeved on the fixed seat (501), and one end of the spring B (702) is fixedly connected to the fixed block (701); the elastic strength of the spring B (702) is greater than the elastic strength of the spring A (606); the movable cylinder (703) is slidably disposed on the fixed block (701); the square block (704) is fixed on the inner wall of the movable cylinder (703).

9. A composite acoustic signature diagnostic device for turbine defects according to claim 8, characterized in that, The longitudinal section of the movable cylinder (703) is an L-shaped structure with a larger upper section and a smaller lower section.

10. A composite acoustic signature diagnostic device for turbine defects according to claim 8, characterized in that, The longitudinal section of the square block (704) is a right-angled triangular structure, and the inclined surface of the square block (704) is in contact with the inclined surface of the sliding block (604).

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