Floating amount monitoring assembly and system for water turbine main shaft sealing floating ring
By installing displacement sensors and measuring discs on the turbine main shaft sealing floating ring, combined with data acquisition and processing modules, the real-time and accuracy issues of floating ring fluctuation monitoring are resolved, ensuring safe and stable equipment operation and preventing flooding and water ingress accidents.
Patent Information
- Application Number
- CN202522070326.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-26
- Publication Date
- 2025-11-04
- Estimated Expiration
- 2035-09-26
AI Technical Summary
Existing technologies cannot monitor the floating amount of the turbine main shaft seal floating ring in real time and accurately, which can lead to seal failure, easily causing flooding and water conduction accidents. In addition, manual reading has large errors and the working environment is harsh, affecting the safe and stable operation of the equipment.
The floating amount monitoring unit, composed of a displacement sensor and a measuring disk, combined with a data acquisition, processing and storage module, monitors the floating amount of the floating ring in real time and provides early warning by analyzing whether the floating ring is stuck through logical conditions.
It enables real-time monitoring of the floating ring's float, reduces human error, provides timely warnings, avoids flooding and water ingress accidents, optimizes equipment operating conditions, and improves equipment safety and stability.
Smart Images
Figure CN223512721U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of hydropower station equipment monitoring technology, and in particular to a floating amount monitoring component and system for a turbine main shaft sealing floating ring. Background Technology
[0002] Currently, during the jacking of the turbine generator unit's rotor (the rotor's function is to balance the bearings and eliminate rotor eccentricity), the floating ring moves upwards along with the turbine's main shaft. However, after the rotor is lowered, the floating ring sometimes jams (increased resistance or jamming) and fails to fall back down with the main shaft. This leads to an increase in the gap between the main shaft seal block and the rotating ring, causing the main shaft seal to lose its function. Simultaneously, the main shaft seal block experiences wear during operation, and once this wear exceeds a certain value, it also loses its main shaft sealing function. All of these situations can lead to a large amount of river water flowing back into the top cover, causing flooding of the water supply system and even flooding of the power plant.
[0003] To measure the floating ring's movement, the common industry practice is to fix a scale to the water tank cover and a measuring rod to the floating ring. The scale reading corresponding to the measuring rod is recorded before and after each maintenance or rotor jacking operation, thus recording the floating ring's movement. However, this method has a difficulty:
[0004] 1. The water tank cover is located inside the top cover. The environment there is humid and the space is small. When the staff checks the values, they are in a poor working position, which makes them prone to fatigue and injury.
[0005] 2. The accuracy of the readings is greatly affected by the way the staff reads the data. Human readings have a large error and cannot accurately reflect the true data of the floating ring's floating amount.
[0006] 3. It is impossible to monitor and reflect the floating amount of the floating ring in real time and in a timely and accurate manner. Utility Model Content
[0007] To address the aforementioned problems, this invention proposes a floating ring monitoring component and system for the main shaft seal of a water turbine, capable of real-time monitoring of the floating ring's movement. This invention can monitor the floating ring's movement before and after water filling of the main shaft seal, as well as during operation, and can analyze whether the floating ring is experiencing jamming. It can issue an early warning before the main shaft seal fails, providing effective data support for judging the equipment's operating status and ensuring the safe and stable operation of the equipment.
[0008] The technical solution adopted in this utility model is as follows:
[0009] A floating amount monitoring assembly for a turbine main shaft sealing floating ring includes multiple floating amount monitoring units. Each floating amount monitoring unit includes a displacement sensor, a measuring disk, and a sensor bracket. The displacement sensor is mounted on the sensor bracket, the measuring disk is connected to the floating ring to be measured, and the sensor bracket is mounted on a corresponding water tank cover plate. There is a preset gap between the displacement sensor and the measuring disk, which changes with the movement of the floating ring.
[0010] Furthermore, when the number of floating volume monitoring units is set to four, the measuring disks are evenly distributed in the four directions of the floating ring: +X axis, +Y axis, -X axis, and -Y axis.
[0011] Furthermore, the measuring disc penetrates the water tank cover, which is located on the end face of the water tank.
[0012] Furthermore, the floating ring is radially provided with a support ring.
[0013] Furthermore, the floating ring is provided with a rotating ring along its axial direction.
[0014] Furthermore, a sealing block is provided between the floating ring and the rotating ring.
[0015] A floating amount monitoring system for a turbine main shaft sealing floating ring includes the floating amount monitoring component, as well as a front-end data acquisition module, a data processing and storage module, and a data security and publishing module. The data input terminal of the front-end data acquisition module is connected to the data output terminal of the floating amount monitoring component. The front-end data acquisition module, the data processing and storage module, and the data security and publishing module are connected sequentially via wired or wireless means.
[0016] Furthermore, the front-end data acquisition module includes a sensor front-end terminal box and a data acquisition box. The data input terminal of the sensor front-end terminal box is connected to the data output terminal of the floating quantity monitoring component. The data output terminal of the sensor front-end terminal box is connected to the data input terminal of the data acquisition box. The data output terminal of the data acquisition box is connected to the data input terminal of the data processing and storage module.
[0017] Furthermore, the data processing and storage module includes an industrial control computer, a data server, and a plant big data platform. The industrial control computer is connected to the front-end data acquisition module, and the industrial control computer, data server, and plant big data platform are connected in sequence. The plant big data platform is connected to the data security and publishing module.
[0018] Furthermore, the data security and publishing module includes a firewall and an office network publishing platform. One side of the firewall is connected to the data processing and storage module, and the other side is connected to the office network publishing platform.
[0019] The beneficial effects of this utility model are as follows:
[0020] (1) This utility model can monitor the floating amount of the floating ring before and after the main shaft seal is filled with water and during operation, and can analyze whether the floating ring is stuck. It can issue an early warning before the main shaft seal fails, provide effective data support for judging the operating status of the equipment, and ensure the safe and stable operation of the equipment.
[0021] (2) This utility model can monitor the change in floating amount of the floating ring in real time, and understand the wear of the floating ring seal block during the operation of the unit without stopping the unit to drain water, so as to arrange the replacement cycle of the floating ring seal block in advance.
[0022] (3) This utility model can monitor whether the floating ring has not fallen down or is stuck after maintenance. The floating amount of the floating ring can be adjusted in advance before the unit is filled with water to avoid water flooding and water conduction accidents.
[0023] (4) This utility model can analyze the displacement of the floating ring of the unit under different operating conditions, especially the floating ring's up-and-down movement caused by changes in downstream water level or pressure and flow of the water supply system, which can provide data support for optimizing the unit's operating conditions.
[0024] (5) The floating quantity monitoring component of this utility model is simple and reliable, the network layout is easy to implement, the sensor is easy to install, the measurement accuracy is high, and the data can be easily queried using the existing big data platform. Attached Figure Description
[0025] Figure 1 This is a schematic diagram of the installation of a floating amount monitoring component for a turbine main shaft sealing floating ring according to Embodiment 1 of this utility model.
[0026] Reference numerals: 1-Displacement sensor, 2-Measuring disc, 3-Sensor bracket, 4-Water tank cover, 5-Water tank, 6-Support ring, 7-Floating ring, 8-Sealing block, 9-Rotating ring. Detailed Implementation
[0027] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, specific embodiments are now described. It should be understood that the specific embodiments described herein are merely illustrative of this utility model and are not intended to limit it; that is, the described embodiments are only a part of, and not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.
[0028] Example 1
[0029] This embodiment provides a floating amount monitoring component for the sealing floating ring of a water turbine main shaft, including multiple floating amount monitoring units. For example... Figure 1 As shown, the floating volume monitoring unit includes a displacement sensor 1, a measuring disk 2, and a sensor bracket 3. The displacement sensor 1 is mounted on the sensor bracket 3, the measuring disk 2 is connected to the floating ring 7 to be measured, and the sensor bracket 3 is mounted on the corresponding water tank cover 4. There is a preset gap between the displacement sensor 1 and the measuring disk 2, which changes with the movement of the floating ring 7.
[0030] Preferably, in this embodiment, the number of floating displacement monitoring units is set to four, with the measuring disks 2 evenly distributed in the four directions of the floating ring 7: +X axis, +Y axis, -X axis, and -Y axis. Before the unit is overhauled and drained, the gaps between the displacement sensors 1 in the four directions of +X axis, +Y axis, -X axis, and -Y axis and the measuring disks 2 are L1, L2, L3, and L4, respectively, and the displacement difference ΔS in the X-axis direction is... X =|L1-L3|, displacement difference ΔS in the Y-axis orientation Y =|L2-L4|;After the unit overhaul, the gaps between displacement sensors 1 and measuring disk 2 in the four directions (+X axis, +Y axis, -X axis, and -Y axis) are L1', L2', L3', and L4', respectively. The displacement difference ΔS in the four directions before and after the overhaul is… +X =|L1'-L1|、△S -X =|L2'-L2|、△S +Y =|L3'-L3|、△S -Y =|L4'-L4|, displacement difference ΔS in the X-axis orientation X =|L1'-L3'|, the displacement difference ΔS in the Y-axis direction. Y =|L2'-L4'|.
[0031] Under ideal conditions, △S X , △S Y The value should be zero. Due to installation factors and uneven wear of the sealing block during operation, △S X , △S Y The values may change. Preferably, the following logical conditions can be set:
[0032] Logical condition 1: "△S" X ≤3 and △S Y ≤3 (reference value, unit: mm). If logic condition 1 is not met, then "Wear warning of seal block wear in operation" will be displayed.
[0033] Logical condition 2: "△S" +X ≤2 and △S -X ≤2 and △S +Y ≤2 and △S -Y ≤2” (reference value, unit: mm). If logical condition 2 is not met, then “the floating ring has not fallen as a whole” will be displayed.
[0034] Logical condition 3: "△S" X '≤3 and △S Y '≤3' (reference value, unit: mm). If logic condition 3 is not met, then "Floating ring stuck" will be displayed.
[0035] Specifically, such as Figure 1 As shown, the measuring plate 2 passes through the water tank cover plate 4, and the water tank cover plate 4 is located on the end face of the water tank 5; the floating ring 7 is provided with a support ring 6 in the radial direction, and a rotating ring 9 is provided in the axial direction of the floating ring 7; a sealing block 8 is provided between the floating ring 7 and the rotating ring 9.
[0036] Example 2
[0037] This embodiment is based on embodiment 1:
[0038] This embodiment provides a floating amount monitoring system for the sealing floating ring of a turbine main shaft, including the floating amount monitoring component as described in Embodiment 1, and further including a front-end data acquisition module, a data processing and storage module, and a data security and publishing module. The data input terminal of the front-end data acquisition module is connected to the data output terminal of the floating amount monitoring component, and the front-end data acquisition module, data processing and storage module, and data security and publishing module are sequentially connected via wired or wireless means.
[0039] Preferably, the front-end data acquisition module includes a sensor front-end terminal box and a data acquisition box. The data input terminal of the sensor front-end terminal box is connected to the data output terminal of the floating quantity monitoring component, the data output terminal of the sensor front-end terminal box is connected to the data input terminal of the data acquisition box, and the data output terminal of the data acquisition box is connected to the data input terminal of the data processing and storage module.
[0040] Preferably, the data processing and storage module includes an industrial control computer, a data server, and a plant big data platform. The industrial control computer is connected to the front-end data acquisition module, and the industrial control computer, data server, and plant big data platform are connected in sequence. The plant big data platform is connected to the data security and publishing module.
[0041] Preferably, the data security and publishing module includes a firewall and an office network publishing platform. One side of the firewall is connected to the data processing and storage module, and the other side is connected to the office network publishing platform.
[0042] In this embodiment, the data collected by the floating ring monitoring component is transferred to the data acquisition box via the sensor front terminal box. The data acquisition box collects and processes the data and sends it to the industrial control computer for numerical calculation. The data processed by the industrial control computer is published to the site's big data platform through the data server. Staff can monitor the site's big data platform in real time to understand the wear of the main shaft sealing floating ring block, whether the floating ring has fallen off as a whole or is stuck before and after unit maintenance, etc., and adjust the floating ring gap in advance based on this information to avoid adverse events.
[0043] The above description is merely a preferred embodiment of this utility model. It should be understood that this utility model is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the concept described herein through the above teachings or related technologies or knowledge. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of this utility model should be protected within the scope of the appended claims.
[0044] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set", "install", and "connect" should be interpreted broadly. For example, they can be fixed connections, detachable connections, or integral connections; they can be mechanical connections or electrical connections; they can be wired connections or wireless connections.
Claims
1. A floating amount monitoring component for a turbine main shaft sealing floating ring, characterized in that, It includes multiple floating volume monitoring units; the floating volume monitoring unit includes a displacement sensor (1), a measuring disk (2) and a sensor bracket (3), the displacement sensor (1) is set on the sensor bracket (3), the measuring disk (2) is connected to the floating ring (7) to be measured, and the sensor bracket (3) is set on the corresponding water tank cover (4); there is a preset gap between the displacement sensor (1) and the measuring disk (2), which changes with the movement of the floating ring (7).
2. The floating amount monitoring component for a turbine main shaft sealing floating ring according to claim 1, characterized in that, When the number of floating quantity monitoring units is set to four, the measuring disks (2) are evenly distributed in the four directions of the floating ring (7): +X axis, +Y axis, -X axis and -Y axis.
3. The floating amount monitoring component for a turbine main shaft sealing floating ring according to claim 1, characterized in that, The measuring plate (2) penetrates the water tank cover plate (4), and the water tank cover plate (4) is located on the end face of the water tank (5).
4. The floating amount monitoring component for the main shaft seal floating ring of a water turbine according to claim 1, characterized in that, The floating ring (7) is radially provided with a support ring (6).
5. The floating amount monitoring component for a turbine main shaft sealing floating ring according to claim 1, characterized in that, The floating ring (7) is provided with a rotating ring (9) along its axial direction.
6. The floating amount monitoring component for a turbine main shaft sealing floating ring according to claim 5, characterized in that, A sealing block (8) is provided between the floating ring (7) and the rotating ring (9).
7. A floating amount monitoring system for a turbine main shaft sealing floating ring, comprising the floating amount monitoring component as described in claim 1, characterized in that, The floating quantity monitoring system also includes a front-end data acquisition module, a data processing and storage module, and a data security and publishing module. The data input end of the front-end data acquisition module is connected to the data output end of the floating quantity monitoring component. The front-end data acquisition module, the data processing and storage module, and the data security and publishing module are connected sequentially via wired or wireless means.
8. The floating amount monitoring system for the main shaft sealing floating ring of a water turbine according to claim 7, characterized in that, The front-end data acquisition module includes a sensor front-end terminal box and a data acquisition box. The data input terminal of the sensor front-end terminal box is connected to the data output terminal of the floating quantity monitoring component. The data output terminal of the sensor front-end terminal box is connected to the data input terminal of the data acquisition box. The data output terminal of the data acquisition box is connected to the data input terminal of the data processing and storage module.
9. A floating amount monitoring system for a turbine main shaft sealing floating ring according to claim 7, characterized in that, The data processing and storage module includes an industrial control computer, a data server, and a plant big data platform. The industrial control computer is connected to the front-end data acquisition module. The industrial control computer, the data server, and the plant big data platform are connected in sequence. The plant big data platform is connected to the data security and publishing module.
10. A floating amount monitoring system for a turbine main shaft sealing floating ring according to claim 7, characterized in that, The data security and publishing module includes a firewall and an office network publishing platform. One side of the firewall is connected to the data processing and storage module, and the other side is connected to the office network publishing platform.