A steam turbine eccentric vibration monitoring device

Abstract

The application discloses a steam turbine eccentric vibration monitoring device, which comprises a device shell, a servo motor is arranged in the device shell, an output shaft of the servo motor is provided with an interlocking motion assembly, a mounting box is arranged on the interlocking motion assembly, a detection limiting assembly is arranged on the mounting box, a rotating shaft and a storage box are arranged on one side of the device shell, a rotating shaft fixing assembly is arranged on the storage box and is used for fixing the rotating shaft into the storage box. In the application, the brush wheel is arranged to facilitate cleaning the rotating shaft, the brush wheel can rotate under the driving of the interlocking motion assembly, the cleaning effect is good, the clamping block and the detection block are arranged, when the deformation of the rotating shaft is detected, the bending condition of the rotating shaft can be marked, the staff can observe the deformation condition conveniently, the threaded rod and the guide rod are arranged, when the rotating shaft is detected, the rotating shaft can be clamped stably and the friction force on the rotating shaft can be increased, the displacement and shaking of the rotating shaft are prevented, and the detection efficiency and the detection result are improved.

Description

Technical Field

[0001] This invention relates to the field of eccentricity detection technology, specifically to a steam turbine eccentricity vibration monitoring device. Background Technology

[0002] During long-term use, steam turbines may experience shaft eccentricity due to factors such as rotor thermal bending or cracks, cylinder temperature differences, dynamic and static friction, airflow turbulence, insufficient bearing oil film stiffness, and rotor component detachment. Eccentricity can lead to friction and collision between the turbine shaft and the diaphragm assembly, causing turbine damage. Therefore, eccentricity measurement has become an essential measurement item during turbine startup or shutdown to detect the shaft bending amplitude and rotor eccentricity position caused by heat or gravity.

[0003] Chinese patent publication number CN202022686832.7 discloses a large steam turbine eccentricity detection device capable of detecting deformed shafts. However, this device has the following shortcomings: First, it requires personnel to observe and obtain data, making it difficult to conveniently observe and detect deformed shafts; second, when detecting shafts after use, the shaft surface is prone to leaving a lot of impurities and debris, which, if not cleaned, can affect the efficiency of subsequent detections and lead to unstable results; third, it cannot easily and stably install and fix the shaft during detection, which can affect the detection efficiency and results. Summary of the Invention

[0004] To address the problems of existing turbine eccentricity detection devices being unable to conveniently detect and observe deformed shafts and making it inconvenient to install and fix shafts in a more stable and convenient manner, this invention provides a turbine eccentricity vibration monitoring device.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A turbine eccentric vibration monitoring device includes a housing, a servo motor inside the housing, an interlocking motion assembly on the output shaft of the servo motor, a mounting box on the interlocking motion assembly, a detection limit assembly on the mounting box, a rotating shaft and a storage box on one side of the housing, and a rotating shaft fixing assembly on the storage box for fixing the rotating shaft into the storage box.

[0007] Preferably, the interlocking motion assembly includes a first gear, a second gear, a gear ring, and a connecting shaft. The output shaft of the servo motor is fixedly connected to the first gear, the first gear is meshed with the second gear, the second gear is meshed with the gear ring, the connecting shaft is fixedly connected to the second gear, a slider is fixedly connected to the connecting shaft, the slider is slidably connected within the device housing, a brush wheel is fixedly connected to the connecting shaft, a bearing is fixedly connected to the connecting shaft, and a mounting box is fixedly connected to the bearing.

[0008] Preferably, the output shaft of the servo motor is fixedly connected to the center of one end of the first gear, and the center line of the first gear and the center line of the second gear are located on the same vertical line.

[0009] Preferably, the second gear is symmetrically distributed on the left and right sides of the first gear, and the first gear corresponds one-to-one with the slider through the connecting shaft.

[0010] Preferably, the detection limiting component includes a slot, a locking block, and a detection block. The mounting box has a slot, a first spring is fixedly connected inside the mounting box, a push plate is fixedly connected to the first spring, a second spring is fixedly connected inside the push plate, a locking block is fixedly connected to the other end of the second spring, a detection block is fixedly connected to the push plate, and a first rubber pad is fixedly connected to the detection block.

[0011] Preferably, the card slots are provided in two sets, which are symmetrically distributed on the left and right sides of the mounting box, and each set of card slots is equidistantly distributed on the mounting box.

[0012] Preferably, the side end face of the push plate is in contact with the inner side end face of the mounting box, and the cross-section of the card block is inclined.

[0013] Preferably, the cross-section of the detection block is arc-shaped, and the threaded rod is rotatably connected to the center of the top of the clamping plate.

[0014] Preferably, the storage box is threadedly connected to a threaded rod, a clamp is rotatably connected to the threaded rod, and a second rubber pad is fixedly connected to the clamp.

[0015] Preferably, the threaded rods are symmetrically distributed on the front and rear sides and the left and right sides of the storage box, and the threaded rods correspond one-to-one with the second rubber pads through clamps.

[0016] Preferably, a guide rod is fixedly connected to the clamp, and the guide rod is slidably connected to the storage box. The cross-section of the clamp is arc-shaped.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] (1) The turbine eccentric vibration monitoring device disclosed in this invention is equipped with a locking block. During the detection, if the detected shaft is deformed, the tilt position of the shaft will push the detection block to drive the push plate to move inward. At the same time as moving inward, the second spring pushes the locking block in the slot. The inclined surface of the locking block can ensure that the locking block can slide stably from the slot. When it slides to the bending limit of the shaft, the locking block is locked in the slot to prevent the first spring from pushing the push plate to move. The bending condition of the shaft can be marked, which is convenient for the staff to observe the deformation.

[0019] (2) The turbine eccentric vibration monitoring device disclosed in this invention is equipped with a first gear. When in use, the servo motor is turned on, and then the first gear drives the second gear to run in the gear ring. While the second gear is running, it can cooperate with the slider to rotate smoothly inside the device housing. While the connecting shafts on both sides are rotating, the brush wheel can rotate the shaft to clean the dust and impurities on the surface, preventing the dust and impurities on the shaft surface from affecting the subsequent inspection results.

[0020] (3) The turbine eccentric vibration monitoring device disclosed in this invention is equipped with a threaded rod. When detecting the rotating shaft, the rotating shaft can be placed in the storage box, and then the threaded rods on the front and rear sides and the left and right sides of the storage box can be rotated. While rotating the threaded rod, the second rubber pad can be moved to a limited position through the clamping plate. While moving the clamping plate to a limited position, the rotating shaft can be clamped smoothly. While moving the clamping plate to a limited position, the detection block can be moved smoothly through the guide rods on both sides. At the same time, the friction force on the rotating shaft can be increased through the second rubber pad to prevent the rotating shaft from displacing and shaking. Attached Figure Description

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

[0022] Figure 2 For the present invention Figure 1 Enlarged structural diagram at point A in the middle;

[0023] Figure 3 This is a side view of the connecting shaft structure of the present invention;

[0024] Figure 4 This is a side view of the gear ring structure of the present invention;

[0025] Figure 5 This is a side view of the detection block structure of the present invention;

[0026] Figure 6 This is a side view of the brush wheel structure of the present invention;

[0027] Figure 7 This is a side view of the storage box structure of the present invention.

[0028] In the diagram: 1. Device housing; 2. Servo motor; 3. First gear; 4. Second gear; 5. Gear ring; 6. Connecting shaft; 7. Slider; 8. Brush wheel; 9. Bearing; 10. Mounting box; 11. Slot; 12. First spring; 13. Push plate; 14. Second spring; 15. Locking block; 16. Detection block; 17. First rubber pad; 18. Rotating shaft; 19. Storage box; 20. Threaded rod; 21. Clamping plate; 22. Second rubber pad; 23. Guide rod. Detailed Implementation

[0029] 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.

[0030] Please see Figure 1-7 This invention provides a technical solution: a turbine eccentric vibration monitoring device, comprising a device housing 1, a servo motor 2 fixedly connected inside the housing 1, a first gear 3 fixedly connected to the output shaft of the servo motor 2, a second gear 4 meshing with the first gear 3, a gear ring 5 meshing with the second gear 4, and a connecting shaft 6 fixedly connected to the second gear 4. The first gear 3, the second gear 4, the gear ring 5, and the connecting shaft 6 form an interlocking motion assembly. A slider 7 is fixedly connected to the connecting shaft 6, and the slider 7 is slidably connected within the device housing 1. A brush wheel 8 is fixedly connected to the connecting shaft 6, a bearing 9 is fixedly connected to the connecting shaft 6, and a mounting box 10 is fixedly connected to the bearing 9. The mounting box 10 has a slot 11. A first spring 12 is fixedly connected inside the mounting box 10. A push plate 13 is fixedly connected to the first spring 12. A second spring 14 is fixedly connected inside the push plate 13. A locking block 15 is fixedly connected to the other end of the second spring 14. A detection block 16 is fixedly connected to the push plate 13. The slot 11, locking block 15 and detection block 16 form a detection and limiting assembly. A first rubber pad 17 is fixedly connected to the detection block 16. A rotating shaft 18 and a storage box 19 are provided on one side of the device housing 1. A threaded rod 20 is threadedly connected to the storage box 19. A clamping plate 21 is rotatably connected to the threaded rod 20. A second rubber pad 22 and a guide rod 23 are fixedly connected to the clamping plate 21.

[0031] As one specific implementation, the output shaft of the servo motor 2 is fixedly connected to the center of one end of the first gear 3. The center line of the first gear 3 and the center line of the second gear 4 are located on the same vertical line, which can ensure that the first gear 3 can smoothly drive the second gear 4 when it is running.

[0032] The second gear 4 is symmetrically distributed on the left and right sides of the first gear 3. The first gear 3 corresponds one-to-one with the slider 7 through the connecting shaft 6, which can ensure that the connecting shafts on both sides can smoothly brush the rotating shaft 18 through the brush wheel 8.

[0033] Two sets of card slots 11 are provided, and the two sets of card slots 11 are symmetrically distributed on the left and right sides of the mounting box 10. Each set of card slots 11 is equidistantly distributed on the mounting box 10, which can ensure that multiple card slots 11 can smoothly drive the card block 15 to engage for calculation.

[0034] The side end face of the push plate 13 is in contact with the inner side end face of the mounting box 10, and the cross-section of the locking block 15 is inclined, which can ensure that the push plate 13 can move smoothly with the support of the inner side end face of the mounting box 10 while it moves.

[0035] The cross-section of the detection block 16 is arc-shaped, and the threaded rod 20 is rotatably connected to the center of the top of the clamping plate 21, which can ensure that the threaded rod 20 can smoothly push the clamping plate 21 to perform limited movement when it is running.

[0036] The threaded rods 20 are symmetrically distributed on the front and rear sides and the left and right sides of the storage box 19. The threaded rods 20 correspond one-to-one with the second rubber pads 22 through the clamping plates 21, which can ensure that the clamping plates 21 on the front and rear sides and the left and right sides can stably clamp and fix the rotating shaft 18.

[0037] A guide rod 23 is fixedly connected to the clamping plate 21. The guide rod 23 is slidably connected to the storage box 19. The cross-section of the clamping plate 21 is arc-shaped, which can ensure that the rotating shaft 18 can be clamped and fixed easily through the arc shape of the clamping plate 21.

[0038] The working principle of this invention is as follows:

[0039] Before using the turbine eccentric vibration monitoring device, it is necessary to check the overall condition of the device to ensure that it can work normally.

[0040] When using this turbine eccentric vibration monitoring device, combined with Figure 1-7First, the operator turns on the servo motor 2 inside the outer casing 1 of the device. The servo motor 2 drives the first gear 3 to run. While the first gear 3 is running, it can drive the second gear 4 to run smoothly within the gear ring 5. While the second gear 4 is running, it can work with the slider 7 to drive the connecting shaft 6 to rotate smoothly. When the connecting shaft 6 on both sides rotates, it can clean the rotating shaft 18 smoothly through the brush wheel 8. The cleaning effect is good. While cleaning, the rotating shaft 18 is inserted into the storage box 19. Then, the servo motor 2 is turned off. Then, the threaded rods 20 on the front and back sides and left and right sides of the storage box 19 are rotated. When the threaded rods 20 rotate, they can drive the second rubber pad 22 to move in a limited position through the clamping plate 21. While the clamping plate 21 is limiting the movement, it can also move smoothly with the support of the guide rod 23. At the same time, the clamping plate 21 and the second rubber pad 22 can smoothly clamp and fix the rotating shaft 18. The second rubber pad 22 can increase the friction between the fixed rotating shaft 18 and prevent the rotating shaft 18 from shifting or shaking.

[0041] The operator pushes the locking block 15 in the slot 11, which simultaneously compresses the second spring 14. Then, under the push of the first spring 12, the push plate 13 moves to a limited position. The detection block 16 on the push plate 13 and the first rubber pad 17 then compress and fix the rotating shaft 18. The detection blocks 16 on both sides smoothly clamp the rotating shaft 18. The servo motor 2 drives the connecting shaft 6 to rotate. Simultaneously, the connecting shaft 6 rotates, driving the mounting box 10 to rotate via the bearing 9. As the mounting box 10 rotates, the detection block 16 at the bottom rotates around the rotating shaft 18. When the detection block 16 passes the bending deformation point of the rotating shaft 18, the deformation point... The push plate 13 on the detection block 16 can be pushed inward. As the push plate 13 moves inward, the second spring 14 pushes the locking block 15 to fit against the inner wall of the mounting box 10. Then, when the inclined surface of the locking block 15 passes through the slot 11, it will be pushed into the slot 11 by the second spring 14. When the rotating shaft 18 continues to push the push plate 13, the inclined surface of the locking block 15 can drive the locking block 15 to retract inward and continue to move inward. When the rotating shaft 18 pushes the push plate 13 to the limit, it can be locked in the slot 11 by the locking block 15 for marking, which is convenient for subsequent staff to observe and calculate. At the same time, the storage box 19 is fixed to the outer wall of the device housing 1. When the storage box 19 rotates slightly, it will not affect the inspection of the detection block 16.

[0042] The above is the entire working process of the device. Any content not described in detail in this specification is existing technology known to those skilled in the art.

[0043] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A turbine eccentric vibration monitoring device, comprising a device housing (1), characterized in that: A servo motor (2) is provided inside the outer casing (1) of the device. An interlocking motion assembly is provided on the output shaft of the servo motor (2). An installation box (10) is provided on the interlocking motion assembly. A detection and limiting assembly is provided on the installation box (10). A rotating shaft (18) and a storage box (19) are provided on one side of the outer casing (1). A rotating shaft fixing assembly is provided on the storage box (19) for fixing the rotating shaft (18) into the storage box (19). The interlocking motion assembly includes a first gear (3), a second gear (4), a gear ring (5), and a connecting shaft (6). The first gear (3), the second gear (4), and the gear ring (5) are disposed inside the device housing (1). The output shaft of the servo motor (2) is fixedly connected to the first gear (3). The first gear (3) is meshed with the second gear (4) on both sides. Each second gear (4) is meshed with the gear ring (5). Each second gear (4) is fixedly connected to a connecting shaft (6). The connecting shaft (6) extends out of the device housing (1). A slider (7) is fixedly connected to the connecting shaft (6). The slider (7) is slidably connected to the device housing (1). A brush wheel (8) and a bearing (9) are fixedly connected to one end of the connecting shaft (6) extending out of the device housing (1). The brush wheel (8) is used to clean the rotating shaft (18). A mounting box (10) is fixedly connected to the bearing (9). The detection limiting component includes a slot (11), a block (15), and a detection block (16). The mounting box (10) has a slot (11). A first spring (12) is provided inside the mounting box (10). A push plate (13) is provided on the first spring (12). A second spring (14) is provided inside the push plate (13). A block (15) is provided on the second spring (14). A detection block (16) is provided on the push plate (13). A first rubber pad (17) is provided on the detection block (16).

2. The turbine eccentricity vibration monitoring device according to claim 1, characterized in that: The output shaft of the servo motor (2) is fixedly connected to the center of one end of the first gear (3), and the center line of the first gear (3) and the center line of the second gear (4) are located on the same vertical line.

3. The turbine eccentricity vibration monitoring device according to claim 1, characterized in that: The second gear (4) is symmetrically distributed on the left and right sides of the first gear (3).

4. The turbine eccentricity vibration monitoring device according to claim 1, characterized in that: The card slots (11) are provided in two sets, and the two sets of card slots (11) are symmetrically distributed on the left and right sides of the mounting box (10). Each set of card slots (11) is equidistantly distributed on the mounting box (10).

5. The turbine eccentricity vibration monitoring device according to claim 1, characterized in that: The side end face of the push plate (13) is in contact with the inner side end face of the mounting box (10).

6. The turbine eccentricity vibration monitoring device according to claim 1, characterized in that: The card block (15) has an inclined cross-section; the detection block (16) has an arc-shaped cross-section.

7. The turbine eccentricity vibration monitoring device according to claim 1, characterized in that: The storage box (19) is threaded with a threaded rod (20), and a clamping plate (21) is rotatably connected to the threaded rod (20). A second rubber pad (22) is provided on one side of the clamping plate (21), and a guide rod (23) is provided on the other side of the clamping plate (21). The guide rod (23) is slidably connected to the storage box (19).

8. The turbine eccentricity vibration monitoring device according to claim 7, characterized in that: The threaded rods (20) are symmetrically distributed on the front and rear sides and the left and right sides of the storage box (19). The threaded rods (20) are rotatably connected to the center of the top of the clamping plate (21). The threaded rods (20) correspond one-to-one with the second rubber pads (22) through the clamping plate (21). The cross-section of the clamping plate (21) is arc-shaped.

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