A device for monitoring axial displacement of a turbine shaft

Abstract

The application discloses a kind of steam turbine axial displacement monitoring devices, including fixed plate and adjusting plate, indicator is equipped on fixed plate, detachably transmission rod is equipped on fixed plate, transmission rod dismounting assembly is equipped on fixed plate, for realizing the dismounting of transmission rod, adjusting plate is equipped with power component and limiting component, transmission rod can be vertically moved under the action of power component, limiting component is used to limit steam turbine shaft.The application, by setting extrusion plate, hydraulic ram, H-shaped block etc., realizes the replacement of transmission rod, increases the service life of device, by setting control handle, screw, movable snap ring etc., it is convenient for user to insert steam turbine shaft into movable snap ring inside, limiting is carried out by movable snap ring, avoid steam turbine shaft from metal shaft when extruding metal shaft under the action of axial thrust and slide off from metal shaft, by setting power component, it is convenient for user to adjust the contact position of metal shaft and machine shaft according to the actual displaceable amplitude of steam turbine shaft, high working efficiency, good working effect.

Description

Technical Field

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

[0002] Steam turbine blades have a certain degree of reaction, and there is a pressure difference between the front and rear sides of the impeller. Therefore, when the steam turbine shaft is working, an axial thrust is generated in the same direction as the steam flow, causing the steam turbine shaft to move and the rotor to produce axial displacement. If the axial thrust of the rotor is too large, the thrust bearing will be overloaded, which will destroy the oil film, causing the thrust bearing to melt and the rotor to move erratically. Therefore, closely monitoring the axial displacement of the unit is of great practical significance.

[0003] Existing axial displacement monitoring devices mostly use a metal shaft that directly contacts the turbine shaft, transmitting changes in the axial displacement of the shaft to an indicator via a lever transmission system to monitor the unit's axial displacement. However, several problems exist:

[0004] First, in the existing monitoring devices, the metal shaft and the indicator are mostly fixedly connected during use. This makes it difficult for users to disassemble and replace the metal shaft when it is damaged after long-term use, resulting in a reduction in the service life of the monitoring device.

[0005] Second, in the use of existing monitoring devices, the length of the metal shaft is mostly fixed. This makes it difficult for users to adjust the contact position between the metal shaft and the turbine shaft according to the actual displacement range of the turbine shaft during the monitoring of different turbine shafts, thus reducing the applicability of the monitoring device.

[0006] Third, in the process of using the existing monitoring device, the metal shaft and the turbine shaft are only in contact. The metal shaft is difficult to limit the turbine shaft, which makes it easy for the turbine shaft to slip off the metal shaft when it is squeezed by the axial thrust of the turbine shaft, thus reducing the working effect of the monitoring device. Summary of the Invention

[0007] The purpose of this invention is to provide a turbine axial displacement monitoring device to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] A turbine axial displacement monitoring device includes a fixed plate and an adjusting plate arranged sequentially from top to bottom. An indicator is provided on the fixed plate, and a transmission rod is detachably provided on the fixed plate. The fixed plate is also provided with a transmission rod disassembly and assembly assembly for disassembling and assembling the transmission rod. The adjusting plate is provided with a power assembly and a limiting assembly. The transmission rod can move vertically under the action of the power assembly, and the limiting assembly is used to limit the turbine shaft.

[0010] Preferably, the power assembly includes a sleeve, a drive motor, a transmission shaft, a worm gear, a turbine, and a rack. The sleeve, transmission shaft, worm gear, turbine, and rack are installed inside the adjusting plate. The output end of the drive motor passes through the interior of the adjusting plate. The output end of the drive motor is equipped with a transmission shaft. A worm gear is fixedly connected to the lower part of the transmission shaft. A turbine is meshed with the left side of the worm gear. The rack and sleeve form a sliding structure. A transmission rod is fixedly connected to the left side of the rack, and a turbine is meshed with the right side of the rack.

[0011] Preferably, a mounting plate is provided on the left side of the transmission rod, a control handle is installed below the mounting plate, a fixed shaft is installed inside the transmission rod, a slider is installed on the outer wall of the fixed shaft and the two form a sliding structure, and the slider is fixedly connected to the mounting plate.

[0012] Preferably, the drive motor is housed inside the power box, and the power box and the drive motor form a detachable structure. The front end of the power box is provided with a heat dissipation vent, and a bearing is provided at the connection between the output end of the drive motor and the power box. The output end of the drive motor and the transmission shaft form a transmission structure through a bevel gear, and the transmission shaft and the worm gear are coaxially arranged.

[0013] Preferably, the adjusting plate is movably connected to the turbine via a rotating shaft.

[0014] Preferably, the limiting assembly includes a lead screw, a control handle, a movable retaining ring, a moving block, a limiting rod, and a limiting block. The output end of the control handle passes through the interior of the mounting plate and is fixedly connected to the lead screw. The lead screw, the moving block, the limiting rod, and the limiting block are installed inside the mounting plate. The moving block is threadedly connected to the outer wall of the lead screw. A limiting rod is installed on the lead screw. A limiting block is installed on the outer wall of the limiting rod. The moving block is connected to the limiting block. A movable retaining ring is fixedly connected to the left side of the moving block.

[0015] Preferably, a bearing is provided at the connection between the control handle and the mounting plate, and the threads on the lead screw are arranged in reverse.

[0016] Preferably, the transmission rod assembly includes a transmission plate, a movable plate, a slide rod, a hydraulic rod, a push rod, and a push rod. The slide rod is installed inside the fixed plate, and the movable plate is installed on the outer wall of the slide rod. Hydraulic rods are installed on both the left and right sides inside the fixed plate. A push rod is fixedly connected to one side of the hydraulic rod. The transmission plate is installed on both the upper and lower sides of the push rod, and an H-shaped block is installed on the transmission plate.

[0017] Preferably, the transmission plate has a groove inside that matches the H-shaped block, the H-shaped block is fixedly connected to the push rod, and the transmission plate is fixedly connected to the moving plate.

[0018] Preferably, a pressing plate is installed on the fixed plate, and a connecting plate is installed at one end of the pressing plate. The fixed plate and the connecting plate are connected by the pressing plate to form a detachable structure. The adjusting plate is located below the connecting plate and the two are fixedly connected.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] (1) The turbine axial displacement monitoring device disclosed in this invention is equipped with a pressing plate. When the transmission rod is difficult to continue to use after a period of use, the user can control the hydraulic rod to extend. Under the action of the hydraulic rod, the push rod drives the H-shaped block to move. Under the action of the H-shaped block, the transmission plate starts to move, driving the moving plate to move, increasing the distance between the moving plates. Under the action of the moving plate, the pressing plate moves to the front and rear ends of the fixed plate, releasing the fixing of the connecting plate, making it convenient for the user to disassemble the adjustment plate, making it convenient for the user to replace the transmission rod on the adjustment plate, and increasing the service life of the device.

[0021] (2) The turbine axial displacement monitoring device disclosed in this invention is equipped with a movable retaining ring. When the user needs to limit the turbine shaft, the user can rotate the control handle. Under the action of the control handle, the lead screw starts to rotate. Under the action of the limiting rod and the limiting block, the moving block starts to move in the opposite direction, which increases the gap between the movable retaining rings. This makes it easier for the user to insert the turbine shaft into the movable retaining ring. When the turbine shaft contacts the transmission rod, it can be limited by the movable retaining ring, which prevents the turbine shaft from slipping off the metal shaft when it is squeezed by the axial thrust, thus reducing the working effect of the monitoring device.

[0022] (3) The turbine axial displacement monitoring device disclosed in this invention is equipped with a rack. When the user needs to monitor the axial displacement, the user can turn on the drive motor. Under the action of the drive motor, the transmission shaft drives the worm gear to rotate. During the rotation of the worm gear, the turbine can be driven to rotate. Under the action of the turbine, the gear drives the transmission rod to move, so that the transmission rod can be extended. This allows the user to adjust the contact position between the metal shaft and the turbine shaft according to the actual displacement range of the turbine shaft. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the external structure of the present invention from the main view.

[0024] Figure 2 This is a schematic diagram of the internal structure of the present invention from the main view.

[0025] Figure 3 For the present invention Figure 2 Enlarged structural diagram at point A in the diagram;

[0026] Figure 4 This is a side view of the internal structure of the mounting plate of the present invention;

[0027] Figure 5 This is a side view of the internal structure of the fixing plate of the present invention.

[0028] In the diagram: 1. Fixed plate; 2. Adjusting plate; 3. Mounting plate; 4. Indicator; 5. Connecting plate; 6. Transmission rod; 7. Extrusion plate; 8. Power box; 9. Transmission plate; 10. Sleeve; 11. Fixed shaft; 12. Moving plate; 13. Drive motor; 14. Transmission shaft; 15. Worm gear; 16. Turbine; 17. Rack; 18. Slider; 19. Lead screw; 20. Control handle; 21. Movable retaining ring; 22. Moving block; 23. Limiting rod; 24. Limiting block; 25. Slide rod; 26. Hydraulic rod; 27. Push rod; 28. H-block. 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 1-5A turbine axial displacement monitoring device includes a fixed plate 1, an adjusting plate 2, and a mounting plate 3. An indicator 4 is fixedly connected to the top of the fixed plate 1, and a pressing plate 7 is installed at the front end of the fixed plate 1. A sliding rod 25 is installed inside the fixed plate 1, and a moving plate 12 is installed on the outer wall of the sliding rod 25. Hydraulic rods 26 are installed on both the left and right sides inside the fixed plate 1, and a push rod 27 is fixedly connected to one side of the hydraulic rod 26. Transmission plates 9 are installed on both the top and bottom sides of the push rod 27, and H-shaped blocks 28 are installed inside the transmission plates 9. A connecting plate 5 is installed at one end of the pressing plate 7. A power box 8 is installed on the right side of the adjusting plate 2, and the adjusting plate 2 is located below the connecting plate 5. A drive motor 13 is installed inside the power box 8, and a drive shaft 14 is installed on the left side of the output end of the drive motor 13. A worm gear 15 is fixedly connected to the lower part of the drive shaft 14, and a turbine 16 is meshed with the left side of the worm gear 15. A sleeve 10 is installed inside the adjusting plate 2, and a rack 17 is installed inside the sleeve 10. The rack 17 extends out from the inside of the sleeve 10. A drive rod 6 is fixedly connected to the left side of the rack 17, and a fixed shaft 11 is installed inside the drive rod 6. A slider 18 is installed on the outer wall of the fixed shaft 11. A control handle 20 is installed below the mounting plate 3, and the mounting plate 3 is located to the left of the drive rod 6. A lead screw 19 is fixedly connected to the output end of the control handle 20, and a moving block 22 is threadedly connected to the outer wall of the lead screw 19. A limit rod 23 is installed below the lead screw 19, and a limit block 24 is installed on the outer wall of the limit rod 23. A movable retaining ring 21 is fixedly connected to the left side of the moving block 22.

[0031] In one specific embodiment, the fixing plate 1 and the connecting plate 5 of the present invention are connected by a pressing plate 7 to form a detachable structure. The pressing plate 7 is symmetrically arranged on the upper and lower sides of the connecting plate 5, and the connecting plate 5 is fixedly connected to the adjusting plate 2. Through the structural relationship between the fixing plate 1 and the connecting plate 5, it is convenient for the user to disassemble the connecting plate 5. Through the distribution relationship between the pressing plate 7 and the connecting plate 5, the user can fix the connecting plate 5 through the pressing plate 7. Through the connection relationship between the connecting plate 5 and the adjusting plate 2, the pressing plate 7 can fix the adjusting plate 2 at the same time after fixing the connecting plate 5.

[0032] The power box 8 has a heat dissipation vent at its front end, and the power box 8 and the drive motor 13 form a detachable structure. A bearing is provided at the connection between the output end of the drive motor 13 and the power box 8. The heat dissipation vent can prevent heat accumulation inside the power box 8 from damaging the drive motor 13. The structural relationship between the power box 8 and the drive motor 13 makes it easy for the user to disassemble the drive motor 13. The bearing can reduce the friction between the power box 8 and the drive motor 13 during operation.

[0033] The transmission plate 9 has a groove inside that matches the H-shaped block 28. The H-shaped block 28 is fixedly connected to the push rod 27, and the transmission plate 9 is fixedly connected to the moving plate 12. Through the structural relationship between the transmission plate 9 and the H-shaped block 28, and the connection relationship between the H-shaped block 28 and the push rod 27, when the push rod 27 moves under the action of the hydraulic rod 26, it can drive the H-shaped block 28 to push or pull the transmission plate 9. During the movement of the H-shaped block 28, it can drive the transmission plate 9 to move. Through the connection relationship between the transmission plate 9 and the moving plate 12, the transmission plate 9 can drive the moving plate 12 to move during the movement of the transmission plate 12.

[0034] The output end of the drive motor 13 passes through the interior of the adjustment plate 2, and the output end of the drive motor 13 and the transmission shaft 14 form a transmission structure through a bevel gear. The transmission shaft 14 and the worm gear 15 are coaxially arranged. Through the structural relationship between the drive motor 13 and the adjustment plate 2, the drive motor 13 can drive the internal structure of the adjustment plate 2 to work during operation. Through the structural relationship between the output end of the drive motor 13 and the transmission shaft 14, the drive motor 13 can drive the transmission shaft 14 to rotate during operation. Through the structural relationship between the transmission shaft 14 and the worm gear 15, the transmission shaft 14 can drive the worm gear 15 to rotate during rotation.

[0035] The turbine 16 is movably connected to the adjusting plate 2 via a rotating shaft, and the turbine 16 is meshed with the rack 17. The rack 17 and the sleeve 10 form a sliding structure. Through the connection between the turbine 16 and the adjusting plate 2, the worm gear 15 can drive the turbine 16 to rotate inside the adjusting plate 2 during rotation. Through the connection between the turbine 16 and the rack 17, the turbine 16 can drive the rack 17 to move up and down during rotation. Through the structural relationship between the rack 17 and the sleeve 10, the sleeve 10 can limit the movement of the rack 17 during its movement.

[0036] The slider 18 and the fixed shaft 11 form a sliding structure, and the slider 18 is fixedly connected to the mounting plate 3. Through the structural relationship between the slider 18 and the fixed shaft 11, the slider 18 can slide on the fixed shaft 11 under the action of external force. Through the connection relationship between the slider 18 and the mounting plate 3, the mounting plate 3 can drive the slider 18 to slide on the fixed shaft 11 during the movement.

[0037] The control handle 20 passes through the interior of the mounting plate 3 and is fixedly connected to the lead screw 19. A bearing is provided at the connection between the control handle 20 and the mounting plate 3, and the upper and lower threads of the lead screw 19 are arranged in opposite directions. Through the structural relationship between the control handle 20 and the mounting plate 3, the user can control the lead screw 19 inside the mounting plate 3 through the control handle 20. During the rotation of the control handle 20, it can drive the lead screw 19 inside the mounting plate 3 to rotate. The bearing can reduce the friction of the mounting plate 3 on the control handle 20 during the rotation of the control handle 20. The reverse-arranged threads can drive the moving block 22 to move in the opposite direction during the rotation of the lead screw 19.

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

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

[0040] When the turbine axial displacement monitoring device is working, when the user needs to monitor the axial displacement, the user can turn on the drive motor 13. Under the action of the drive motor 13, the transmission shaft 14 drives the worm gear 15 to rotate. During the rotation of the worm gear 15, the turbine 16 can be driven to rotate. Under the action of the turbine 16, the rack 17 drives the transmission rod 6 to move, so that the transmission rod 6 is extended, which makes it convenient for the user to adjust the contact position between the metal shaft and the turbine shaft according to the actual displacement range of the turbine shaft.

[0041] When the turbine axial displacement monitoring device is working, if the user needs to limit the turbine shaft, the user can rotate the control handle 20. Under the action of the control handle 20, the lead screw 19 starts to rotate. Under the action of the limit rod 23 and the limit block 24, the moving block 22 starts to move in the opposite direction, which increases the gap between the movable retaining rings 21. This makes it easier for the user to insert the turbine shaft into the movable retaining rings 21. When the turbine shaft contacts the transmission rod 6, it can be limited by the movable retaining rings 21, which prevents the turbine shaft from slipping off the metal shaft when it is squeezed by the axial thrust, thus reducing the working effect of the monitoring device.

[0042] When the turbine axial displacement monitoring device is working, if the transmission rod 6 becomes unusable after a period of use, the user can control the hydraulic rod 26 to extend. Under the action of the hydraulic rod 26, the push rod 27 drives the H-block 28 to move. Under the action of the H-block 28, the transmission plate 9 begins to move, driving the moving plate 12 to move, increasing the distance between the moving plates 12. Under the action of the moving plate 12, the pressing plate 7 moves to the front and rear ends of the fixed plate 1, releasing the fixation of the connecting plate 5, making it convenient for the user to disassemble the adjusting plate 2 and replace the transmission rod 6 on the adjusting plate 2, thus increasing the service life of the device.

[0043] 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.

[0044] 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 axial displacement monitoring device, comprising a fixed plate (1) and an adjusting plate (2) arranged sequentially from top to bottom, wherein an indicator (4) is provided on the fixed plate (1), characterized in that: The fixed plate (1) is detachably provided with a transmission rod (6), and the fixed plate (1) is also provided with a transmission rod disassembly and assembly assembly for disassembling and assembling the transmission rod (6). The adjusting plate (2) is provided with a power assembly and a limiting assembly. The transmission rod (6) can move vertically under the action of the power assembly. The limiting assembly is used to limit the turbine shaft. The left side of the transmission rod (6) is provided with an mounting plate (3). The transmission rod assembly includes a transmission plate (9), a movable plate (12), a slide rod (25), a hydraulic rod (26), a push rod (27), and an H-shaped block (28). The slide rod (25) is installed inside the fixed plate (1), and the movable plate (12) is installed on the outer wall of the slide rod (25). The hydraulic rod (26) is installed on both the left and right sides inside the fixed plate (1). The push rod (27) is fixedly connected to one side of the hydraulic rod (26). The transmission plate (9) is installed on both the top and bottom sides of the push rod (27). The H-shaped block (28) is installed on the transmission plate (9). The transmission plate (9) has a groove that matches the H-shaped block (28) inside. The H-shaped block (28) is fixedly connected to the push rod (27), and the transmission plate (9) is fixedly connected to the movable plate (12). The power assembly includes a sleeve (10), a drive motor (13), a transmission shaft (14), a worm gear (15), a turbine (16), and a rack (17). The sleeve (10), transmission shaft (14), worm gear (15), turbine (16), and rack (17) are all installed inside the adjusting plate (2). The output end of the drive motor (13) passes through the interior of the adjusting plate (2). The output end of the drive motor (13) is equipped with the transmission shaft (14). The lower part of the transmission shaft (14) is fixed. A worm gear (15) is fixedly connected to the sleeve (10), and a turbine (16) is meshed with the left side of the worm gear (15). A rack (17) is installed inside the sleeve (10), and the rack (17) extends out from the inside of the sleeve (10). The rack (17) and the sleeve (10) form a sliding structure. A transmission rod (6) is fixedly connected to the left side of the rack (17), and the turbine (16) is meshed with the right side of the rack (17). The adjusting plate (2) and the turbine (16) are movably connected through a rotating shaft. The limiting assembly includes a lead screw (19), a control handle (20), a movable retaining ring (21), a moving block (22), a limiting rod (23), and a limiting block (24). The control handle (20) is installed below the mounting plate (3). The output end of the control handle (20) passes through the interior of the mounting plate (3) and is fixedly connected to the lead screw (19). The lead screw (19), the moving block (22), the limiting rod (23), and the limiting block (24) are installed inside the mounting plate (3). The moving block (22) is threadedly connected to the outer wall of the lead screw (19). The limiting rod (23) is installed on the lead screw (19). The limiting block (24) is installed on the outer wall of the limiting rod (23). The moving block (22) is connected to the limiting block (24). The movable retaining ring (21) is fixedly connected to the left side of the moving block (22).

2. The turbine axial displacement monitoring device according to claim 1, characterized in that: The transmission rod (6) has a fixed shaft (11) installed inside, and a slider (18) is installed on the outer wall of the fixed shaft (11), and the two form a sliding structure. The slider (18) is fixedly connected to the mounting plate (3).

3. The turbine axial displacement monitoring device according to claim 1, characterized in that: A power box (8) is installed on the right side of the adjustment plate (2). The drive motor (13) is located inside the power box (8). The power box (8) and the drive motor (13) form a detachable structure. A heat dissipation port is provided at the front end of the power box (8). A bearing is provided at the connection between the output end of the drive motor (13) and the power box (8). The output end of the drive motor (13) and the transmission shaft (14) form a transmission structure through a bevel gear. The transmission shaft (14) and the worm gear (15) are coaxially arranged.

4. The turbine axial displacement monitoring device according to claim 1, characterized in that: A bearing is provided at the connection between the control handle (20) and the mounting plate (3), and the threads on the lead screw (19) are reversed.

5. The turbine axial displacement monitoring device according to claim 1, characterized in that: An extrusion plate (7) is installed on the fixed plate (1). A connecting plate (5) is installed at one end of the extrusion plate (7). The fixed plate (1) and the connecting plate (5) are connected by the extrusion plate (7) to form a detachable structure. The adjustment plate (2) is located below the connecting plate (5) and the two are fixedly connected. The extrusion plate (7) is symmetrically arranged on the upper and lower sides of the connecting plate (5).

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