A vibration detection assembly for electrical equipment of a thermal power plant

Abstract

This invention belongs to the field of vibration detection technology, and particularly relates to a vibration detection component for electrical equipment in thermal power plants. It includes a detection mechanism, a drive mechanism, and a limiting mechanism. The detection mechanism includes a probe and an auxiliary frame. The probe is detachably mounted on the auxiliary frame, which is magnetically attached to a bearing seat. The drive mechanism includes a support plate and a drive wheel mounted on the end of the support plate. The limiting mechanism includes a limiting wheel and an adjustment structure connected to the limiting wheel. The adjustment structure is used to adjust the position of the limiting wheel relative to the drive wheel, so that the drive wheel and the limiting wheel clamp a central shaft. The drive wheel and the limiting wheel are positioned opposite each other on both sides of the central shaft and, under the action of a drive source, drive the central shaft to rotate, thereby generating a vibration signal in the bearing seat, which is then collected by the detection mechanism. Through this structure, the device can perform vibration detection even when the equipment is stopped, and it has adaptability to different central shafts and stable signal acquisition performance.

Description

Technical Field

[0001] This invention belongs to the field of vibration detection technology, and in particular relates to a vibration detection component for electrical equipment in thermal power plants. Background Technology

[0002] As a core facility for energy supply, power plants typically have rotating components such as bearings and rotors in their electrical equipment (e.g., motors, feedwater pumps, induced draft fans, and forced draft fans). These components are prone to wear, imbalance, or loosening under long-term high-temperature and high-load conditions, which can lead to abnormal vibrations. Therefore, vibration detection is of great significance for ensuring the safe operation of the equipment.

[0003] Currently, portable vibration meters are commonly used in thermal power plants to detect vibrations in equipment. By attaching the probe to vibration transmission parts such as bearing housings, vibration signals generated during equipment operation are collected to determine the equipment's operating status.

[0004] However, existing vibration measurement methods rely on the equipment being in operation and can only detect vibrations when rotating parts vibrate. This presents significant challenges for monitoring a large number of intermittently operating or occasionally running electrical devices in thermal power plants (such as standby motors, emergency feedwater pumps, intermittent desulfurization system fans, maintenance standby pumps, and high-voltage standby circuit breaker operating mechanisms). These devices are normally shut down and on standby. Forcing them to start to meet vibration monitoring requirements not only consumes extra energy but may also exacerbate wear and tear and shorten their lifespan due to frequent starts and stops. Conversely, without monitoring, potential faults such as aging bearings and loose components cannot be identified, making these devices a "blind spot" for vibration monitoring. If they fail to start due to malfunctions during a sudden start-up request, it will directly impact the power plant's emergency response capabilities and the stable operation of the units, creating serious safety hazards. Summary of the Invention

[0005] To address the technical problems existing in the background art, the present invention provides a vibration detection component for electrical equipment in thermal power plants.

[0006] To achieve the above objectives, the technical solution provided by the present invention is as follows: A vibration detection component for electrical equipment in a thermal power plant includes a detection mechanism, a drive mechanism, and a limiting mechanism. The detection mechanism includes a probe and an auxiliary frame. The probe is detachably mounted on the auxiliary frame, while the auxiliary frame is magnetically attached to a bearing seat. The driving mechanism includes a support plate and a driving wheel mounted on the end of the support plate. The limiting mechanism includes a limiting wheel and an adjustment structure connected to the limiting wheel. The driving wheel and the limiting wheel are arranged opposite to each other on both sides of the central shaft, and the adjustment structure is used to adjust the position of the limiting wheel relative to the driving wheel so that the driving wheel and the limiting wheel clamp the central shaft. The drive mechanism is connected to a drive source to drive the drive wheel to rotate; When the drive wheel is in contact with the central shaft, it drives the central shaft to rotate relative to the bearing housing, thereby generating a vibration signal in the bearing housing, which is then detected by the detection mechanism.

[0007] Optionally, the adjustment structure includes a vertical frame and a top frame, the vertical frame and the top frame are plugged together, the limiting wheels are set on the top frame, and the vertical frame can be adjusted and moved relative to the drive mechanism.

[0008] Optionally, two support plates are symmetrically arranged at the end of the support plate, the drive wheel is located between the two support plates, and the end shaft of the drive wheel is rotatably connected by a bearing and passes through the support plate.

[0009] Optionally, the end of the drive wheel protruding from the support plate is provided with a driven gear, the outer end of which is meshed with a drive gear, and the drive gear is rotatably mounted on the outer end of the support plate via a coupling shaft, the end of which is provided with a polygonal column.

[0010] Optionally, the driving source is an electric drill, the polygonal column is clamped and connected to the end of the electric drill, the support plate is provided with a fixed arc plate and a clamping arc plate, and the electric drill is set between the fixed arc plate and the clamping arc plate.

[0011] Optionally, a gripping rod is provided on the support plate, and the gripping rod is threadedly connected to the support plate via a bottom post.

[0012] Optionally, the vertical frame includes a base rod and a curved plate fixedly connected to the top of the base rod. The base rod has an ear plate on its side, and the ear plate is connected to an adjusting screw via a bearing. A vertical tube is provided on the support plate, and the base rod passes through the vertical tube and is slidably connected to the vertical tube. A threaded tube is provided on the vertical tube, and the adjusting screw is threadedly connected to the threaded tube.

[0013] Optionally, the top frame includes an L-shaped plug-in plate with a plug-in hole at the end of the bent plate. The plug-in plate is inserted into the plug-in hole and fixedly connected to the bent plate by a brake bolt. An arc-shaped frame is rotatably connected to the end of the plug-in plate. An arc-shaped plate is provided at the bottom of the arc-shaped frame. A splicing plate is detachably provided below the arc-shaped plate. A rotation-limiting wheel is provided between the arc-shaped plate and the splicing plate.

[0014] Optionally, the auxiliary frame includes annular magnets and deformation tubes distributed vertically. The deformation tubes have an arc-shaped structure. An end plate is fixedly connected to the outer wall of the deformation tube. A support tube is also fixedly connected to the outer wall of the deformation tube. The end plate is connected to the support tube by bolts.

[0015] Optionally, the outer end of the magnet is provided with a side tube, and a support rod is provided inside the side tube. The support rod passes through the support tube and is threaded with a nut. A spring is sleeved on the support rod, and the two ends of the spring abut against the support tube and the nut respectively. The spring causes the probe to elastically abut against the bearing seat, and a rubber pad is provided on the magnet to contact the bearing seat. The probe is electrically connected to an electrical control box.

[0016] The present invention has the following advantages and beneficial effects: To address the problem that existing vibration detection methods rely on the operating status of the equipment and are difficult to use for equipment that is stopped or operating intermittently, this invention sets up a driving mechanism and a limiting mechanism, which clamp the driving wheel and the limiting wheel onto the central shaft. Under the action of the driving source, the central shaft is driven to rotate, thereby generating a vibration signal in the bearing housing when the equipment is stopped. This signal is then collected by the detection mechanism, avoiding the need to forcibly start the equipment for detection.

[0017] To address the problem of varying central shaft diameters and difficulty in ensuring clamping stability in different devices, this invention employs an adjustment structure to make the position of the limiting wheel relative to the driving wheel adjustable, thereby achieving adaptation to central shafts of different specifications and ensuring stable driving of the central shaft by the driving wheel.

[0018] To address the problem of unstable contact between the probe and the detection area, which affects signal acquisition, this invention uses a magnetic auxiliary frame and an elastic abutment structure to ensure that the probe can stably adhere to the bearing seat surface, thereby guaranteeing the continuity of vibration signal acquisition. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the vibration detection component for electrical equipment in thermal power plants according to the present invention; Figure 2 This is a top view of the vibration detection component for electrical equipment in thermal power plants according to the present invention; Figure 3 This is a front view of the vibration detection component for electrical equipment in thermal power plants according to the present invention; Figure 4 This is a schematic diagram of the electric drill and drive mechanism of the present invention; Figure 5 This is a schematic diagram of the structure of the support plate of the present invention; Figure 6 This is a schematic diagram of the limiting mechanism of the present invention; Figure 7 This is a schematic diagram of the vertical frame of the present invention; Figure 8 This is a schematic diagram of the top frame structure of the present invention; Figure 9 This is a schematic diagram of the detection mechanism of the present invention; Figure 10 This is a schematic diagram of the auxiliary frame of the present invention.

[0020] Reference numerals: 1. Bearing housing; 11. Central shaft; 2. Detection mechanism; 21. Probe; 22. Auxiliary frame; 221. Magnet; 222. Rubber pad; 223. Side tube; 224. Support rod; 225. Spring; 226. Nut; 227. End plate; 228. Deformation tube; 229. Support tube; 3. Limiting mechanism; 31. Limiting wheel; 32. Top frame; 321. Arc frame; 322. Arc plate; 323. Splicing plate; 324. Insertion plate; 33. Vertical frame; 33 1. Adjusting screw; 332. Ear plate; 333. Bend plate; 334. Insertion hole; 335. Brake bolt; 336. Base rod; 4. Electrical control box; 5. Electric drill; 6. Drive mechanism; 61. Drive wheel; 62. Support plate; 621. Fixed arc plate; 622. Clamping arc plate; 623. Grip rod; 624. Base column; 625. Vertical tube; 626. Threaded tube; 627. Support plate; 63. Driven gear; 64. Drive gear; 65. Coupling shaft; 651. Polygonal column. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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 some embodiments of the present invention, but not all embodiments.

[0022] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0023] Example like Figures 1-10 As shown, a vibration detection component for electrical equipment in a thermal power plant includes a detection mechanism 2, a drive mechanism 6, and a limiting mechanism 3.

[0024] The detection mechanism 2 includes a probe 21 and an auxiliary frame 22. The probe 21 is detachably mounted on the auxiliary frame 22. The auxiliary frame 22 is magnetically attached to the bearing seat 1, so that the probe 21 contacts the outer end of the bearing seat 1, thereby realizing the acquisition of vibration signals.

[0025] like Figures 3-5As shown, the drive mechanism 6 includes a support plate 62 and a drive wheel 61 mounted on the end of the support plate 62. The limiting mechanism 3 includes a limiting wheel 31 and an adjustment structure connected to the limiting wheel 31. The drive wheel 61 and the limiting wheel 31 are arranged opposite to each other on both sides of the central shaft 11. The drive mechanism 6 is connected to a drive source 5. In this embodiment, the drive source 5 is preferably an electric drill. The drive wheel 61 drives the central shaft 11 to rotate, causing the bearing seat 1 to generate a vibration signal, which, in conjunction with the probe 21, enables vibration detection.

[0026] Furthermore, two support plates 627 are symmetrically arranged at the end of the support plate 62, and the drive wheel 61 is arranged between the two support plates 627. The end shaft of the drive wheel 61 is rotatably connected by a bearing and passes through the support plate 627, thereby realizing the stable support and rotation of the drive wheel 61.

[0027] Furthermore, a driven gear 63 is provided at the end of the drive wheel 61 that protrudes from the support plate 627. The driven gear 63 meshes with the drive gear 64, which is rotatably mounted on the outer end of the support plate 627 via a connecting shaft 65. A polygonal post 651 is provided at the end of the connecting shaft 65. The polygonal post 651 is clamped and connected to the end of the electric drill. The electric drill drives the connecting shaft 65 to rotate, thereby driving the drive gear 64 and the driven gear 63 to rotate, which in turn drives the drive wheel 61 to rotate.

[0028] In addition, a fixed arc plate 621 and a clamping arc plate 622 are provided on the support plate 62. The electric drill is positioned between the fixed arc plate 621 and the clamping arc plate 622 to achieve stable clamping of the electric drill. A gripping rod 623 is provided on the support plate 62. The gripping rod 623 is threadedly connected to the support plate 62 through a bottom post 624, which facilitates the operator to move and operate the device by hand.

[0029] like Figures 6-8 As shown, the adjustment structure further includes a vertical frame 33 and a top frame 32, with the vertical frame 33 and the top frame 32 being plugged together, and a limiting wheel 31 being disposed on the top frame 32.

[0030] Specifically, the vertical frame 33 includes a base rod 336 and a curved plate 333 fixedly connected to the top of the base rod 336. An ear plate 332 is provided on the side of the base rod 336, and the ear plate 332 is connected to an adjusting screw 331 via a bearing. A vertical tube 625 is provided on the support plate 62, through which the base rod 336 passes and is slidably connected. A threaded tube 626 is provided on the vertical tube 625, and the adjusting screw 331 is threadedly connected to the threaded tube 626. By rotating the adjusting screw 331, the vertical frame 33 can be driven to move up and down relative to the support plate 62, thereby adjusting the distance between the limiting wheel 31 and the driving wheel 61.

[0031] Furthermore, the top frame 32 includes an L-shaped plug-in plate 324, which is inserted into the plug-in hole 334 on the bent plate 333 and fixedly connected by a brake bolt 335; an arc-shaped frame 321 is rotatably provided at the end of the plug-in plate 324, an arc-shaped plate 322 is provided at the bottom of the arc-shaped frame 321, and a splicing plate 323 is detachably provided below the arc-shaped plate 322; a limiting wheel 31 is rotatably provided between the arc-shaped plate 322 and the splicing plate 323, thereby improving the fit with the central shaft 11.

[0032] like Figures 9-10 As shown, the auxiliary frame 22 further includes annular magnets 221 and deformation tubes 228 distributed vertically. The deformation tubes 228 have an arc-shaped structure, and an end plate 227 and a support tube 229 are fixedly connected to their outer walls. The end plate 227 is connected to the support tube 229 by bolts.

[0033] A side tube 223 is provided on the side of the magnet 221. A support rod 224 is provided inside the side tube 223. The support rod 224 passes through the support tube 229. A nut 226 is threadedly connected to the threaded section of the support rod 224. A spring 225 is sleeved on the support rod 224. The two ends of the spring 225 abut against the support tube 229 and the nut 226 respectively, so that the probe 21 elastically abuts against the bearing seat 1.

[0034] Meanwhile, a rubber pad 222 is provided on the magnet 221. The rubber pad 222 contacts the bearing seat 1, which can improve the fit and reduce the measurement error. The rubber pad 222 is relatively thin, so it is necessary to ensure that the magnet 221 is stably attracted to the outer wall of the bearing seat 1. The probe 21 is electrically connected to the electrical control box 4. The electrical control box 4 is used to process the collected vibration signal and output the corresponding vibration parameters.

[0035] The electrical control box 4 is equipped with a signal processing unit and a display unit. The signal processing unit is used to amplify, filter and convert the electrical signal output by the probe 21 to improve the stability and accuracy of the signal. The display unit is used to display the processed vibration parameters.

[0036] During use, after the probe 21 contacts the bearing housing 1, it converts the vibration signal into an electrical signal and transmits it to the electrical control box 4. After processing, it outputs parameters such as vibration velocity, acceleration, or displacement, thereby realizing the detection and judgment of the operating status of electrical equipment.

[0037] Specifically, the working principle of this vibration detection component for electrical equipment in thermal power plants is as follows: First, the probe 21 is fixed to the bearing housing 1 via an auxiliary frame 22. The auxiliary frame 22 adopts a magnetic structure, ensuring stable contact between the probe 21 and the surface of the bearing housing 1. After contacting the bearing housing 1, the probe 21 can detect the minute vibrations generated by the operation of the equipment.

[0038] The drive mechanism 6 is powered by the electric drill 5, and the rotation of the electric drill 5 drives the coupling 65 to rotate. The coupling 65 is connected to the drive gear 64, which meshes with the driven gear 63, and the driven gear 63 in turn drives the drive wheel 61 to rotate. The drive wheel 61 is mounted on the end of the support plate 62 and contacts the central shaft 11. Through friction, it drives the central shaft 11 to rotate, thereby causing the bearing structure that it mates with to vibrate.

[0039] To ensure stable contact between the drive wheel 61 and the central shaft 11, the distance between the limiting wheel 31 and the drive wheel 61 in the limiting mechanism 3 can be adjusted by an adjustment structure. By rotating the adjusting screw 331, the vertical frame 33 can move up and down relative to the support plate 62, thereby adjusting the distance between the limiting wheel 31 and the drive wheel 61 to ensure stable clamping of the drive wheel 61 on the central shaft 11.

[0040] When the electric drill 5 starts working, the drive wheel 61 drives the central shaft 11 to rotate. When the central shaft 11 rotates, the bearing housing 1 will vibrate accordingly. The probe 21 collects the vibration signal of the bearing housing 1, and processes and displays it through the electrical control box 4, providing data support for the vibration status monitoring of the equipment.

[0041] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A vibration detection component for electrical equipment in a thermal power plant, characterized in that, It includes a detection mechanism (2), a driving mechanism (6) and a limiting mechanism (3). The detection mechanism (2) includes a probe (21) and an auxiliary frame (22). The probe (21) is detachably mounted on the auxiliary frame (22), and the auxiliary frame (22) is magnetically attached to the bearing seat (1). The driving mechanism (6) includes a support plate (62) and a driving wheel (61) mounted on the end of the support plate (62). The limiting mechanism (3) includes a limiting wheel (31) and an adjustment structure connected to the limiting wheel (31). The driving wheel (61) and the limiting wheel (31) are arranged opposite to each other on both sides of the central shaft (11). The adjustment structure is used to adjust the position of the limiting wheel (31) relative to the driving wheel (61) so that the driving wheel (61) and the limiting wheel (31) clamp the central shaft (11). The drive mechanism (6) is connected to a drive source (5) to drive the drive wheel (61) to rotate; The drive wheel (61) drives the central shaft (11) to rotate relative to the bearing seat (1) while it is clamped and in contact with the central shaft (11), thereby causing the bearing seat (1) to generate a vibration signal, which is then detected by the detection mechanism (2).

2. The vibration detection component for electrical equipment in a thermal power plant according to claim 1, characterized in that: The adjustment structure includes a vertical frame (33) and a top frame (32). The vertical frame (33) and the top frame (32) are connected by a plug. The limiting wheel (31) is set on the top frame (32). The vertical frame (33) can be adjusted and moved relative to the driving mechanism (6).

3. The vibration detection component for electrical equipment in a thermal power plant according to claim 1, characterized in that: The support plate (62) has two support plates (627) symmetrically arranged at its end. The drive wheel (61) is located between the two support plates (627), and the end shaft of the drive wheel (61) is rotatably connected by a bearing and passes through the support plate (627).

4. The vibration detection component for electrical equipment in a thermal power plant according to claim 3, characterized in that: The drive wheel (61) has a driven gear (63) at the end of the protruding support plate (627). The outer end of the driven gear (63) is meshed with a drive gear (64). The drive gear (64) is rotatably mounted on the outer end of the support plate (627) via a connecting shaft (65). The end of the connecting shaft (65) is provided with a polygonal column (651).

5. A vibration detection component for electrical equipment in a thermal power plant according to claim 4, characterized in that: The driving source (5) is an electric drill. The polygonal column (651) is clamped and connected to the end of the electric drill. The support plate (62) is provided with a fixed arc plate (621) and a clamping arc plate (622). The electric drill is located between the fixed arc plate (621) and the clamping arc plate (622).

6. The vibration detection component for electrical equipment in a thermal power plant according to claim 3, characterized in that: The support plate (62) is provided with a gripping rod (623), and the gripping rod (623) is threadedly connected to the support plate (62) through a bottom post (624).

7. A vibration detection component for electrical equipment in a thermal power plant according to claim 2, characterized in that: The vertical frame (33) includes a base rod (336) and a bent plate (333) fixedly connected to the top of the base rod (336). The side of the base rod (336) is provided with an ear plate (332). The ear plate (332) is connected to an adjusting screw (331) through a bearing. A vertical tube (625) is provided on the support plate (62). The base rod (336) passes through the vertical tube (625) and is slidably connected to the vertical tube (625). A threaded tube (626) is provided on the vertical tube (625). The adjusting screw (331) is threadedly connected to the threaded tube (626).

8. A vibration detection component for electrical equipment in a thermal power plant according to claim 7, characterized in that: The top frame (32) includes an L-shaped plug plate (324). The end of the bent plate (333) is provided with a plug hole (334). The plug plate (324) is inserted into the plug hole (334). The plug plate (324) is fixedly connected to the bent plate (333) by a brake bolt (335). The end of the plug plate (324) is rotatably connected to an arc frame (321). The bottom of the arc frame (321) is provided with an arc plate (322). A splicing plate (323) is detachably provided below the arc plate (322). The limiting wheel (31) is rotatably disposed between the arc plate (322) and the splicing plate (323).

9. A vibration detection component for electrical equipment in a thermal power plant according to claim 1, characterized in that: The auxiliary frame (22) includes annular magnets (221) and deformation tubes (228) distributed vertically. The deformation tubes (228) have an arc-shaped structure. An end plate (227) is fixedly connected to the outer wall of the deformation tubes (228). A support tube (229) is also fixedly connected to the outer wall of the deformation tubes (228). The end plate (227) is connected to the support tube (229) by bolts.

10. A vibration detection component for electrical equipment in a thermal power plant according to claim 9, characterized in that: The magnet (221) has a side tube (223) at its outer end. A support rod (224) is provided inside the side tube (223). The support rod (224) passes through the support tube (229). A nut (226) is threadedly connected to the threaded section of the support rod (224). A spring (225) is sleeved on the support rod (224). The two ends of the spring (225) abut against the support tube (229) and the nut (226) respectively. The spring (225) makes the probe (21) elastically abut against the bearing seat (1). A rubber pad (222) is provided on the magnet (221) to contact the bearing seat (1). The probe (21) is electrically connected to an electrical control box (4).

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