Unit monitoring system for pumped storage power station

Abstract

The application discloses a unit monitoring system for pumped storage power station, which comprises a water turbine with a main shaft installed on a support, a packing seal assembly arranged between the main shaft and the water turbine, and a moving rod, a first guide mechanism, a first detection mechanism, a rotating mechanism and a second detection mechanism. The application can monitor the rotating state of the main shaft and the wear state of the packing body by setting the moving rod, the first guide mechanism, the first detection mechanism, the rotating mechanism and the second detection mechanism, so as to ensure the normal operation of the water turbine and the operation effect of the pumped storage power station unit. The application has the advantage of timely discovery and protection of the operation effect of the unit.

Description

Technical Field

[0001] This invention relates to the field of pumped storage power station unit technology, and in particular to a monitoring system for pumped storage power station units. Background Technology

[0002] With the continuous growth of my country's power system capacity, the daily fluctuation of power load is also increasing. Pumped storage units utilize electricity generated during off-peak hours to pump water and store energy, releasing the water to generate electricity during peak hours. With their unique peak-shaving and valley-filling characteristics, they play a crucial role in regulating load, promoting energy conservation in the power system, and maintaining the safe and stable operation of the power grid, becoming an effective and indispensable regulatory tool for my country's power system. As a vital component of pumped storage units, the turbine's operational safety is receiving increasing attention. Among these aspects, the turbine's main shaft seal is a critical protective element, and currently, the primary sealing method used is a packing seal assembly.

[0003] However, existing pumped storage power station unit monitoring systems are not easy to detect in a timely manner when the main shaft seal gradually wears down, thus affecting the normal operation of the turbine. Furthermore, when the main shaft vibrates, it is also not easy to detect in a timely manner, which will also affect the normal operation of the turbine and thus affect the operating performance of the pumped storage power station unit. Summary of the Invention

[0004] The purpose of this invention is to provide a monitoring system for pumped storage power station units. This invention has the advantage of being able to detect problems in a timely manner, thereby ensuring the effective operation of the units.

[0005] The technical solution of the present invention: a monitoring system for pumped storage power station units, including a turbine with a main shaft mounted on a support, a packing seal assembly provided between the main shaft and the turbine, the packing seal assembly including a packing body and a pressure cap; and further including a moving rod, a first guiding mechanism, a first detection mechanism, a rotating mechanism and a second detection mechanism;

[0006] The movable rod is installed on the side wall of the support, and a ball bearing is provided at the end of the movable rod near the main shaft; a rotating rod is rotatably connected to the top of the water turbine, and a top rod is fixedly connected to the bottom of the rotating rod, with the lower end of the top rod abutting against the top of the pressure cover.

[0007] The first guide mechanism is disposed on the side wall of the bracket and is used to connect the moving rod and the bracket;

[0008] The first detection mechanism is installed on the side wall of the support and is used to detect the movement of the moving rod;

[0009] The rotating mechanism is located on the top of the water turbine and is used to rotate the rotating rod;

[0010] The second detection mechanism is installed on the side wall of the bracket and is used to detect the rotation of the rotating rod.

[0011] In the aforementioned pumped storage power station unit monitoring system, the first guiding mechanism includes two symmetrically arranged T-shaped guide rods fixedly connected to the side wall of the support. The side wall of the T-shaped guide rod is fitted with a first slider, and the first slider is fixed to the side wall of the moving rod.

[0012] In the aforementioned pumped storage power station unit monitoring system, the first detection mechanism includes a U-shaped frame fixedly connected to the side wall of the support. A distance sensor is fixedly inserted into the side wall of the U-shaped frame. A rotating plate is connected to the side wall of the support through a rotating assembly, and a first sensing block is fixedly connected to the side wall of the rotating plate.

[0013] In the aforementioned pumped storage power station unit monitoring system, the rotating component includes two symmetrically arranged fixed plates fixedly connected to the side wall of the support; the rotating plate is rotatably connected to the side wall of the fixed plate through a first rotating shaft, a first gear is fixedly sleeved on the side wall of the first rotating shaft, and a first rack is connected to the side wall of the fixed plate through a first reset mechanism.

[0014] In the aforementioned pumped storage power station unit monitoring system, the first reset mechanism includes a first support block fixedly connected to the side wall of a fixed plate, and two symmetrically arranged first guide rods fixedly connected to the side wall of the first support block; two symmetrically arranged second sliders are sleeved on the side wall of the first guide rods, and a first spring is also sleeved on the side wall of the first guide rods; the second sliders are fixed to the side wall of the first rack, and the first rack is meshed with the first gear.

[0015] In the aforementioned pumped storage power station unit monitoring system, the rotating mechanism includes two symmetrically arranged support plates fixedly connected to the top of the turbine. The rotating rod is rotatably connected to the side wall of the support plate through a second rotating shaft. A second gear is fixedly sleeved on the side wall of the second rotating shaft. A second rack is connected to the side wall of the support plate through a second reset mechanism. The second rack is meshed with the second gear.

[0016] In the aforementioned pumped storage power station unit monitoring system, the second reset mechanism includes two symmetrically arranged second support blocks fixedly connected to the side wall of the support plate, and two symmetrically arranged second guide rods fixedly connected to the side wall of the second support blocks; a third slider is sleeved on the side wall of the second guide rod, and the third slider is fixed to the side wall of the second rack; a second spring is sleeved on the side wall of the second guide rod.

[0017] In the aforementioned pumped storage power station unit monitoring system, the second detection mechanism includes a movable plate, and a second sensing block is fixedly connected to the upper end of the movable plate; the movable plate is connected to the side wall of the support through a second guide mechanism; and a connecting mechanism is provided between the movable plate and the rotating rod.

[0018] In the aforementioned pumped storage power station unit monitoring system, the second guiding mechanism includes two symmetrically arranged connecting plates fixedly connected to the side wall of the support, and a fixed rod fixedly connected to the top of the connecting plates; a fourth slider is sleeved on the side wall of the fixed rod, and the fourth slider is fixed to the side wall of the moving plate.

[0019] In the aforementioned pumped storage power station unit monitoring system, the connecting mechanism includes an avoidance groove formed on the side wall of the rotating plate, and a rotating rod inserted into the avoidance groove; a fixing block is fixedly connected to the other end of the rotating plate, and a connecting rod is rotatably connected to the side wall of the fixing block through a first rotating pin; the other end of the connecting rod is rotatably connected to the side wall of the moving plate through a second rotating pin.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] 1. By setting up a first detection mechanism, when the turbine is working, the main shaft rotates. At the same time, under the action of the first spring, the ball bearings abut against the side wall of the main shaft and roll there. When the rotation of the main shaft causes a jump, the moving rod will move closer to the support or away from the support. When the moving rod moves closer to the support, the rotating plate will rotate clockwise along the first axis. When the moving rod moves away from the support, the rotating plate can rotate counterclockwise along the first axis. By detecting the distance of the first sensing block by the distance sensor, it can be determined whether the jump of the main shaft exceeds the required range. This allows for monitoring of the rotation status of the main shaft, ensuring the normal operation of the turbine, and thus ensuring the operating effect of the pumped storage power station unit.

[0022] 2. By setting up a second detection mechanism, when the turbine is working, the top rod abuts against the top of the gland under the action of the second spring. As the packing body gradually wears down, the gland moves downward. At this time, the top rod slides on the top of the gland, and the rotating rod can rotate upward along the second rotating shaft. When the rotating rod rotates upward, it causes the connecting rod to rotate and pushes the moving plate and the second sensing block upward. The more severe the wear of the packing body, the greater the downward stroke of the gland, and the greater the upward stroke of the second sensing block. When the distance sensor detects the second sensing block, it indicates that the wear of the packing body is relatively severe. At this time, an alarm is triggered to remind the operator to inspect and replace it. This allows for monitoring of the wear status of the packing body, ensuring the normal operation of the turbine, and thus ensuring the operating effect of the pumped storage power station unit.

[0023] Therefore, the present invention has the advantage of being able to detect problems in a timely manner, thereby ensuring the effective operation of the unit. Attached Figure Description

[0024] Figure 1This is a schematic diagram of the structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ;

[0026] Figure 3 for Figure 1 Enlarged view of point A in the middle;

[0027] Figure 4 for Figure 2 Enlarged view of point B in the middle;

[0028] Figure 5 for Figure 3 Enlarged view of point C in the middle;

[0029] Figure 6 for Figure 4 Enlarged view at point D;

[0030] Figure 7 for Figure 4 Enlarged view of point E in the middle.

[0031] In the attached diagram, the following markings are used: 1-bracket, 2-first guide mechanism, 201-T-shaped guide rod, 202-first slider, 3-first detection mechanism, 301-rotating plate, 302-first sensing block, 303-U-shaped frame, 304-distance sensor, 4-rotating assembly, 401-fixed plate, 402-first rotating shaft, 403-first gear, 404-first rack, 5-first reset mechanism, 501-first support block, 502-first guide rod, 503-second slider, 504-first spring, 6-rotating mechanism, 601-support plate, 602-second rotating shaft, 603-second gear, 604-second rack, 7-first... Second reset mechanism, 701-Second support block, 702-Second guide rod, 703-Third slider, 704-Second spring, 8-Second detection mechanism, 801-Moving plate, 802-Second sensing block, 9-Second guide mechanism, 901-Connecting plate, 902-Fixing rod, 903-Fourth slider, 10-Connecting mechanism, 1001-Fixing block, 1002-First rotating pin, 1003-Connecting rod, 1004-Second rotating pin, 1005-Allowing groove, 11-Water turbine, 1101-Main shaft, 1102-Pack body, 1103-Pressure cap, 12-Moving rod, 13-Ball bearing, 14-Rotating rod, 15-Top rod. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0033] Example. A monitoring system for pumped storage power station units, such as... Figure 1-7As shown, the device includes a water turbine 11 with a main shaft 1101 mounted on a bracket 1. A packing seal assembly is provided between the main shaft 1101 and the water turbine 11. The packing seal assembly includes a packing body 1102 and a pressure cap 1103. It also includes a moving rod 12, a first guide mechanism 2, a first detection mechanism 3, a rotating mechanism 6, and a second detection mechanism 8.

[0034] The movable rod 12 is set on the side wall of the bracket 1, and a ball bearing 13 is provided at one end of the movable rod 12 near the main shaft 1101; a rotating rod 14 is rotatably connected to the top of the water turbine 11, and a top rod 15 is fixedly connected to the bottom of the rotating rod 14, with the lower end of the top rod 15 abutting against the top of the pressure cover 1103.

[0035] The first guide mechanism 2 is disposed on the side wall of the bracket 1 and is used to connect the moving rod 12 and the bracket 1;

[0036] The first detection mechanism 3 is installed on the side wall of the support 1 and is used to detect the movement of the moving rod 12;

[0037] The rotating mechanism 6 is located on the top of the water turbine 11 and is used to rotate the rotating rod 14;

[0038] The second detection mechanism 8 is installed on the side wall of the bracket 1 and is used to detect the rotation of the rotating rod 14.

[0039] like Figure 4 As shown, the first guiding mechanism 2 includes two symmetrically arranged T-shaped guide rods 201 fixedly connected to the side wall of the support 1. The side wall of the T-shaped guide rods 201 is fitted with a first slider 202. The first slider 202 is fixed to the side wall of the moving rod 12, which can monitor the rotation state of the main shaft 1101 and the wear state of the packing body 1102, ensuring the normal operation of the turbine 11, and thus ensuring the operating effect of the pumped storage power station unit.

[0040] like Figure 4 As shown, the first detection mechanism 3 includes a U-shaped frame 303 fixedly connected to the side wall of the support 1. A distance sensor 304 is fixedly inserted into the side wall of the U-shaped frame 303. A rotating plate 301 is connected to the side wall of the support 1 through a rotating assembly 4, and a first sensing block 302 is fixedly connected to the side wall of the rotating plate 301.

[0041] When the turbine 11 is working, the main shaft 1101 rotates. At the same time, the ball bearings 13 abut against and roll against the side wall of the main shaft 1101. When the rotation of the main shaft 1101 causes a jump, the moving rod 12 will move closer to the support 1 or away from the support 1. When the moving rod 12 moves closer to the support 1, the rotating plate 301 will rotate clockwise along the rotating assembly 4. When the moving rod 12 moves away from the support 1, the rotating plate 301 can rotate counterclockwise along the rotating assembly 4. By detecting the distance of the first sensing block 302 through the distance sensor 304, it can be determined whether the jump of the main shaft 1101 exceeds the required range, thereby enabling the monitoring of the rotation state of the main shaft 1101.

[0042] like Figure 6 As shown, the rotating assembly 4 includes two symmetrically arranged fixed plates 401 fixedly connected to the side wall of the bracket 1; the rotating plate 301 is rotatably connected to the side wall of the fixed plate 401 through a first rotating shaft 402, a first gear 403 is fixedly sleeved on the side wall of the first rotating shaft 402, and a first rack 404 is connected to the side wall of the fixed plate 401 through a first reset mechanism 5. When the first rotating shaft 402 rotates, it drives the first rack 404 to move.

[0043] The first reset mechanism 5 includes a first support block 501 fixedly connected to the side wall of the fixed plate 401. Two symmetrically arranged first guide rods 502 are fixedly connected to the side wall of the first support block 501. Two symmetrically arranged second sliders 503 are sleeved on the side wall of the first guide rods 502. A first spring 504 is also sleeved on the side wall of the first guide rods 502. The second sliders 503 are fixed to the side wall of the first rack 404. The first rack 404 is meshed with the first gear 403, which guides and resets the movement of the first rack 404.

[0044] like Figure 5 As shown, the rotating mechanism 6 includes two symmetrically arranged support plates 601 fixedly connected to the top of the turbine 11. The rotating rod 14 is rotatably connected to the side wall of the support plate 601 through a second rotating shaft 602. A second gear 603 is fixedly sleeved on the side wall of the second rotating shaft 602. A second rack 604 is connected to the side wall of the support plate 601 through a second reset mechanism 7. The second rack 604 is meshed with the second gear 603. When the rotating rod 14 rotates, it drives the second gear 603 to rotate synchronously. The second rack 604 moves on the second reset mechanism 7.

[0045] The second reset mechanism 7 includes two symmetrically arranged second support blocks 701 fixedly connected to the side wall of the support plate 601. Two symmetrically arranged second guide rods 702 are fixedly connected to the side wall of the second support blocks 701. A third slider 703 is sleeved on the side wall of the second guide rod 702. The third slider 703 is fixed to the side wall of the second rack 604. A second spring 704 is sleeved on the side wall of the second guide rod 702. The second spring 704 is in a compressed state to ensure that the top rod 15 abuts against the top of the pressure cover 1103, and plays a guiding and reset role in the movement of the second rack 604.

[0046] like Figure 7 As shown, the second detection mechanism 8 includes a movable plate 801, and a second sensing block 802 is fixedly connected to the upper end of the movable plate 801; the movable plate 801 is connected to the side wall of the bracket 1 through a second guide mechanism 9; a connecting mechanism 10 is provided between the movable plate 801 and the rotating rod 14.

[0047] When the turbine 11 is working, the top rod 15 abuts against the top of the pressure cover 1103 under the action of the second spring 704. When the packing body 1102 gradually wears, the pressure cover 1103 will move downward. At this time, the top rod 15 slides on the top of the pressure cover 1103. At the same time, the rotating rod 14 can rotate upward along the second rotating shaft 602. When the rotating rod 14 rotates upward, it pushes the moving plate 801 and the second sensing block 802 upward through the connecting mechanism 10. When the packing body 1102 is more severely worn, the pressure cover 1103 moves downward for a longer distance, which in turn makes the second sensing block 802 move upward for a longer distance. When the distance sensor 304 detects the second sensing block 802, it indicates that the wear of the packing body 1102 is relatively severe. At this time, an alarm is triggered to remind the operator to inspect and replace it, thereby enabling the monitoring of the wear status of the packing body 1102.

[0048] The second guiding mechanism 9 includes two symmetrically arranged connecting plates 901 fixedly connected to the side wall of the bracket 1. A fixing rod 902 is fixedly connected to the top of the connecting plate 901. A fourth slider 903 is sleeved on the side wall of the fixing rod 902. The fourth slider 903 is fixed to the side wall of the moving plate 801 and plays a guiding and limiting role in the movement of the moving plate 801.

[0049] The connecting mechanism 10 includes a clearance groove 1005 formed on the side wall of the rotating plate 301, and a rotating rod 14 is inserted into the clearance groove 1005. A fixing block 1001 is fixedly connected to the other end of the rotating plate 301. A connecting rod 1003 is rotatably connected to the side wall of the fixing block 1001 through a first rotating pin 1002. The other end of the connecting rod 1003 is rotatably connected to the side wall of the moving plate 801 through a second rotating pin 1004. When the rotating rod 14 rotates upward, the connecting rod 1003 rotates and pushes the moving plate 801 and the second sensing block 802 to move upward.

[0050] Working principle:

[0051] When the turbine 11 is working, the main shaft 1101 rotates. At the same time, under the action of the first spring 504, the ball bearing 13 abuts against and rolls against the side wall of the main shaft 1101. When the rotation of the main shaft 1101 causes a jump, the moving rod 12 will move closer to the support 1 or away from the support 1. When the moving rod 12 moves closer to the support 1, the rotating plate 301 will rotate clockwise along the first rotating shaft 402. When the moving rod 12 moves away from the support 1, the rotating plate 301 can rotate counterclockwise along the first rotating shaft 402. The distance sensor 304 detects the distance of the first sensing block 302, which can determine whether the jump of the main shaft 1101 exceeds the required range. Thus, the rotation state of the main shaft 1101 can be monitored to ensure the normal operation of the turbine 11.

[0052] Meanwhile, when the turbine 11 is working, the top rod 15 abuts against the top of the gland 1103 under the action of the second spring 704. When the packing body 1102 gradually wears, the gland 1103 will move downward. At this time, the top rod 15 slides on the top of the gland 1103. At the same time, the rotating rod 14 can rotate upward along the second rotating shaft 602. When the rotating rod 14 rotates upward, the connecting rod 1003 rotates and pushes the moving plate 801 and the second sensing block 802 upward. When the packing body 1102 is more severely worn, the pressure gland 1103 moves downward more, and the second sensing block 802 moves upward more. When the distance sensor 304 detects the second sensing block 802, it indicates that the wear of the packing body 1102 is relatively severe. At this time, an alarm is triggered to remind the operator to inspect and replace it, thereby monitoring the wear status of the packing body 1102 and ensuring the normal operation of the turbine 11.

Claims

1. A unit monitoring system for pumped storage power station, comprising a water turbine (11) comprising a main shaft (1101) installed on a support (1), a packing seal assembly is arranged between the main shaft (1101) and the water turbine (11), the packing seal assembly comprises a packing body (1102) and a gland (1103), characterized in that: It also includes a moving rod (12), a first guide mechanism (2), a first detection mechanism (3), a rotating mechanism (6), and a second detection mechanism (8); ​ The movable rod (12) is set on the side wall of the bracket (1), and a ball bearing (13) is provided at one end of the movable rod (12) near the main shaft (1101); a rotating rod (14) is rotatably connected to the top of the water turbine (11), and a top rod (15) is fixedly connected to the bottom of the rotating rod (14), and the lower end of the top rod (15) abuts against the top of the pressure cover (1103); The first guide mechanism (2) is disposed on the side wall of the bracket (1) and is used to connect the moving rod (12) and the bracket (1). The first detection mechanism (3) is set on the side wall of the bracket (1) and is used to detect the movement of the moving rod (12); The rotating mechanism (6) is located on the top of the water turbine (11) and is used to rotate the rotating rod (14); The second detection mechanism (8) is set on the side wall of the bracket (1) and is used to detect the rotation of the rotating rod (14); The first detection mechanism (3) includes a U-shaped frame (303) fixedly connected to the side wall of the support (1). A distance sensor (304) is fixedly inserted into the side wall of the U-shaped frame (303). A rotating plate (301) is connected to the side wall of the support (1) through a rotating assembly (4), and a first sensing block (302) is fixedly connected to the side wall of the rotating plate (301). The rotating assembly (4) includes two symmetrically arranged fixed plates (401) fixedly connected to the side wall of the bracket (1); the rotating plate (301) is rotatably connected to the side wall of the fixed plate (401) through a first rotating shaft (402), a first gear (403) is fixedly sleeved on the side wall of the first rotating shaft (402), and a first rack (404) is connected to the side wall of the fixed plate (401) through a first reset mechanism (5). The first reset mechanism (5) includes a first support block (501) fixedly connected to the side wall of the fixed plate (401). The side wall of the first support block (501) is fixedly connected to two symmetrically arranged first guide rods (502). The side wall of the first guide rod (502) is sleeved with two symmetrically arranged second sliders (503). The side wall of the first guide rod (502) is also sleeved with a first spring (504). The second sliders (503) are fixed to the side wall of the first rack (404), and the first rack (404) is meshed with the first gear (403).

2. The pumped storage power station unit monitoring system according to claim 1, characterized in that: The first guide mechanism (2) includes two symmetrically arranged T-shaped guide rods (201) fixedly connected to the side wall of the bracket (1). The side wall of the T-shaped guide rod (201) is fitted with a first slider (202), and the first slider (202) is fixed to the side wall of the moving rod (12).

3. The pumped storage power station unit monitoring system according to claim 1, characterized in that: The rotating mechanism (6) includes two symmetrically arranged support plates (601) fixedly connected to the top of the turbine (11). The rotating rod (14) is rotatably connected to the side wall of the support plate (601) through the second rotating shaft (602). The side wall of the second rotating shaft (602) is fixedly sleeved with a second gear (603). The side wall of the support plate (601) is connected to a second rack (604) through a second reset mechanism (7). The second rack (604) is meshed with the second gear (603).

4. The pumped storage power station unit monitoring system according to claim 3, characterized in that: The second reset mechanism (7) includes two symmetrically arranged second support blocks (701) fixedly connected to the side wall of the support plate (601). The side wall of the second support block (701) is fixedly connected to two symmetrically arranged second guide rods (702). The side wall of the second guide rod (702) is sleeved with a third slider (703), which is fixed to the side wall of the second rack (604). The side wall of the second guide rod (702) is sleeved with a second spring (704).

5. The pumped storage power station unit monitoring system according to claim 1, characterized in that: The second detection mechanism (8) includes a movable plate (801), and a second sensing block (802) is fixedly connected to the upper end of the movable plate (801); the movable plate (801) is connected to the side wall of the bracket (1) through the second guide mechanism (9); a connecting mechanism (10) is provided between the movable plate (801) and the rotating rod (14).

6. The pumped storage power station unit monitoring system according to claim 5, characterized in that: The second guide mechanism (9) includes two symmetrically arranged connecting plates (901) fixedly connected to the side wall of the bracket (1), and a fixed rod (902) fixedly connected to the top of the connecting plate (901); a fourth slider (903) is sleeved on the side wall of the fixed rod (902), and the fourth slider (903) is fixed to the side wall of the moving plate (801).

7. The pumped storage power station unit monitoring system according to claim 5, characterized in that: The connecting mechanism (10) includes a clearance groove (1005) formed on the side wall of the rotating plate (301), and a rotating rod (14) inserted in the clearance groove (1005); a fixing block (1001) is fixedly connected to the other end of the rotating plate (301), and a connecting rod (1003) is rotatably connected to the side wall of the fixing block (1001) through a first rotating pin (1002); the other end of the connecting rod (1003) is rotatably connected to the side wall of the moving plate (801) through a second rotating pin (1004).

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