A water turbine generator thrust pad inward movement monitoring system

Abstract

This application discloses a thrust bearing inward displacement monitoring system for a hydro-generator, comprising a base ring on which a thrust bearing, a support bearing, and a spacer block are mounted. It also includes a thrust bearing sensor, a support bearing sensor, and a spacer block support bearing sensor for measuring displacement. The thrust bearing sensor faces the outer end face of the thrust bearing, the support bearing sensor faces the outer end face of the support bearing, and the spacer block support bearing sensor faces the side end face of the support bearing. The beneficial effects of this application are: the monitoring system is simple and reliable, the sensors are easy to install, the measurement accuracy is high, and data can be easily queried and analyzed using a big data platform; the system can detect potential problems such as thrust bearing inward displacement in advance by monitoring the inward displacement of the thrust bearing in real time, avoiding serious damage to the equipment due to malfunctions, reducing the number of maintenance operations and equipment replacement frequency, thereby saving maintenance costs and equipment replacement expenses, reducing maintenance costs, and improving the economic benefits of the enterprise.

Description

Technical Field

[0001] This application belongs to the field of hydro-generator technology, specifically relating to a hydro-generator thrust bearing inward movement monitoring system and monitoring method. Background Technology

[0002] Thrust bearings are a crucial component of vertical turbine generator sets, responsible for bearing the loads of the rotating parts. However, after long-term operation, varying degrees of inward displacement of the thrust bearings have been observed, reaching up to 20mm. Significant inward displacement reduces the bearing's contact area, increases pressure load, and raises its temperature. This displacement can also reduce the clearance between the thrust bearing and the spacer block, causing jamming, and malfunctioning the thrust bearing's spring self-adjustment function, resulting in uneven stress on the thrust bearing and posing a significant threat to the safe and stable operation of the unit. Currently, there is no reliable device or system for monitoring this radial inward displacement of the thrust bearings in vertical turbine generator sets, as it is caused by the thermal expansion and contraction of the thrust bearing. This abnormal change in thrust bearing displacement cannot be detected in real time; it can only be discovered during major overhauls when the thrust bearing is disassembled for inspection. This lack of timeliness makes it impossible to prevent the thrust bearing from jamming due to inward displacement, which can easily lead to significant equipment failure and economic losses. Utility Model Content

[0003] The purpose of this application is to provide a thrust bearing inward movement monitoring system for a hydro-generator. This system monitors the operating status of the thrust bearing in real time, including its inward movement. When the inward movement reaches its limit value, an alarm signal is issued in a timely manner to remind operation and maintenance personnel to check and handle the problem promptly. Before the gap between the thrust bearing and the spacer block decreases and jams, or before the self-adjusting function of the thrust bearing spring bundle fails, the problem can be repaired and resolved in a timely manner. This provides effective data support for equipment operation status analysis and ensures the safe and stable operation of the equipment.

[0004] The objective of this application is achieved through the following technical solution: A thrust bearing inward displacement monitoring system for a hydro-generator includes a base ring on which thrust bearings, support bearings, and spacer blocks are mounted. The system also includes a thrust bearing sensor, a support bearing sensor, and a spacer block support bearing sensor for measuring displacement. The thrust bearing sensor is opposite to the outer end face of the thrust bearing, the support bearing sensor is opposite to the outer end face of the support bearing, and the spacer block support bearing sensor is opposite to the side end face of the support bearing.

[0005] Furthermore, the thrust pad sensor, the toe pad sensor, and the spacer block toe pad sensor are all eddy current sensors.

[0006] Furthermore, the thrust bearing sensor is arranged radially along the base ring.

[0007] Furthermore, the Towa sensor is arranged radially along the base ring.

[0008] Furthermore, the outer end face of the thrust pad is flush with the outer end face of the toe pad, and the measurement reference surface of the thrust pad sensor is flush with the measurement reference surface of the toe pad sensor.

[0009] Furthermore, the spacer block Towa sensor is arranged tangentially along the base ring.

[0010] Furthermore, the measuring reference surface of the spacer block trolley sensor is flush with the side end face of the spacer block, and the gap between the trolley and the spacer block is at least 2 mm.

[0011] Furthermore, the thrust pad sensor, the torpedo pad sensor, and the spacer block torpedo pad sensor are all fixed to the sensor bracket by threaded assemblies, and the sensor bracket is fixed to the base ring.

[0012] Furthermore, the thrust pad is mounted on the support pad, a spring bundle is provided between the support pad and the base ring, and a spacer block is provided between two adjacent support pads, with the spacer block fixed on the base ring.

[0013] Furthermore, the thrust pads and support pads are evenly arranged in a circumferential direction, with one thrust pad corresponding to one support pad.

[0014] The beneficial effects of this application are: (1) The monitoring system is simple and reliable, the sensor is easy to install, the measurement accuracy is high, and the big data platform can be used to conveniently query and analyze data.

[0015] (2) This system can detect potential problems such as thrust bearing inward movement in advance by monitoring the thrust bearing in real time, avoid serious damage to equipment due to failure, reduce the number of maintenance and equipment replacement frequency, thereby saving maintenance costs and equipment replacement costs, reducing maintenance costs and improving the economic benefits of enterprises.

[0016] (3) The system has a monitoring limit value alarm reminder function. When it reaches its inner displacement limit value, it will issue an alarm signal in time to remind the operation and maintenance personnel to check and deal with it in time. Before the gap between the thrust bearing and the spacer block decreases and jams, and the self-adjustment function of the thrust bearing spring bundle fails, the system can repair and solve the problem in time, provide effective data support for the analysis of the unit's operating status, enhance the stability of the hydro-generator unit, reduce the probability of failure caused by thrust bearing problems, and ensure the safe and reliable operation of the unit.

[0017] (4) The monitoring system can analyze the internal displacement of the thrust bearing under different operating conditions, find the pattern of internal displacement of the thrust bearing and the maintenance cycle, and provide strong data support for the maintenance of the thrust bearing.

[0018] (5) The promotion and application of this monitoring system will help improve the technical level of the entire hydropower industry, prompt other related enterprises to increase their investment in technology research and development, promote the industry to develop towards intelligence and efficiency, promote the technological progress of the industry, and improve the overall safety operation level and market competitiveness of the hydropower industry.

[0019] The aforementioned main solution and its various further alternatives can be freely combined to form multiple solutions, all of which are solutions that can be adopted and claimed in this application; furthermore, the (non-conflicting alternatives) can also be freely combined with each other and with other alternatives. Those skilled in the art, after understanding this solution, will realize from the prior art and common general knowledge that there are many combinations, all of which are technical solutions to be protected in this application, and will not be exhaustively listed here. Attached Figure Description

[0020] Figure 1 This is a radial sectional view of the structural installation of this application.

[0021] Figure 2 This is a top view of the structural installation of this application.

[0022] Figure 3 yes Figure 2 AA-direction installation section view (tangential).

[0023] In the diagram: Thrust pad sensor-1, drag pad sensor-2, sensor bracket-3, mirror plate-4, thrust pad-5, drag pad-6, spacer block-7, spacer block drag pad sensor-8, base ring-9. Detailed Implementation

[0024] The present application will be further described below with reference to specific embodiments and accompanying drawings.

[0025] Example 1 refer to Figures 1-3 As shown, a thrust bearing inward movement monitoring system for a hydro-generator includes a thrust bearing sensor 1, a bearing sensor 2, a sensor bracket 3, a mirror plate 4, a thrust bearing 5, a bearing 6, a spacer block 7, a spacer block bearing sensor 8, and a base ring 9.

[0026] The base ring 9 serves as the mounting base for the thrust bearing. The base ring 9 is equipped with thrust pads 5, support pads 6, and spacers 7. Specifically, the thrust pads 5 are mounted on the support pads 6. A spring bundle connects the support pads 6 to the base ring 9. Spacers 7 are located between adjacent support pads 6 and are fixed to the base ring 9 with bolts. Several thrust pads 5 and support pads 6 are evenly arranged circumferentially, with one thrust pad 5 corresponding to one support pad 6.

[0027] The thrust pad sensor 1, the toe pad sensor 2, and the spacer block toe pad sensor 8 are used to measure displacement. The thrust pad sensor 1 is opposite to the outer end face of the thrust pad 5, the toe pad sensor 2 is opposite to the outer end face of the toe pad 6, and the spacer block toe pad sensor 8 is opposite to the side end face of the toe pad 6, thereby obtaining the thrust pad inward displacement, the toe pad inward displacement, and the distance between the spacer block and the toe pad, respectively.

[0028] The thrust pad sensor 1, the torpedo pad sensor 2, and the spacer block torpedo pad sensor 8 are all eddy current sensors with a range of 0-4mm and an input voltage of DC-24V. The measured distance is calculated from the output voltage value. The thrust pad sensor 1 is arranged radially along the base ring 9, the torpedo pad sensor 2 is arranged radially along the base ring 9, and the spacer block torpedo pad sensor 8 is arranged tangentially along the base ring 9 to ensure accurate measurement orientation, so that the measured value can accurately reflect the displacement.

[0029] The outer end face of the thrust pad 5 is flush with the outer end face of the toe pad 6, and the measurement reference surface of the thrust pad sensor 1 is flush with the measurement reference surface of the toe pad sensor 2. Therefore, the relative displacement of the thrust pad 5 and the toe pad 6 can be determined by comparing the data of the thrust pad sensor 1 and the toe pad sensor 2.

[0030] The measuring reference surface of the spacer block trolley sensor 8 is flush with the side end face of the spacer block 7, and the gap between the trolley 6 and the spacer block 7 is at least 2mm, so as to accurately determine the gap size through the measurement data of the spacer block trolley sensor 8.

[0031] The thrust pad sensor 1, the torpedo pad sensor 2, and the spacer block torpedo pad sensor 8 are all fixed to the sensor bracket 3 by threaded assembly. The sensor bracket 3 is fixed to the base ring 9 to achieve specific installation and fixation of the sensors.

[0032] A method for monitoring the inward movement of thrust bearings in a hydro-generator, using the aforementioned hydro-generator thrust bearing inward movement monitoring system, is described below.

[0033] When the thrust bearing is installed and adjusted accurately, the initial clearance values ​​measured by thrust bearing sensor 1, bearing sensor 2, and spacer block bearing sensor 8 are respectively S 推力瓦 S 拖瓦 S 间隔块与拖瓦 During the operation of the thrust bearing, the actual clearance values ​​measured by thrust bearing sensor 1, bearing sensor 2, and spacer block bearing sensor 8 are S, respectively. 推力瓦1 S 拖瓦1 S 间隔块与拖瓦1 The radial inward displacement of the thrust bearing is ΔS. 推力瓦 =S 推力瓦1 -S 推力瓦 The radial inward displacement of the drag pad is ΔS 拖瓦 =S 拖瓦1 -S 拖瓦The change in distance between the drag tile and the spacer block is ΔS. 间隔块与拖瓦 =S 间隔块与拖瓦1 -S 间隔块与拖瓦 .

[0034] If △S 推力瓦 =0, at this time the thrust bearing does not move inward; if ΔS = 0, then the thrust bearing does not move in 推力瓦 >0, △S 拖瓦 =0, at this time the thrust bearing moves inward by ΔS 推力瓦 The trailer did not move inward; if △S 推力瓦 =△S 拖瓦 >0, △S 间隔块与拖瓦 <0, at this time both the thrust bearing and the trailing bearing move inward by ΔS 推力瓦 This indicates a malfunction in the hook of the fixed thrust bearing (deformation, loose bolts, or breakage). ΔS should be set according to the unit's design and operating requirements. 推力瓦 , △S 拖瓦 , △S 间隔块与拖瓦 The warning value is set, and when the calculated value exceeds the warning value, the data anomaly alarm will issue an alarm to remind the operation and maintenance personnel to pay more attention and handle the situation.

[0035] By using sensors for real-time monitoring and data acquisition, processing, and storage, and leveraging a big data analytics platform, we can query and analyze the changing trends of thrust bearing inward displacement under different operating conditions over a period of time. This allows us to identify the patterns of thrust bearing inward displacement and the maintenance cycle, providing strong data support for thrust bearing maintenance.

[0036] The foregoing basic examples and their further alternative examples can be freely combined to form multiple embodiments, all of which are embodiments that can be adopted and claimed in this application. In the scheme of this application, each alternative example can be arbitrarily combined with any other basic example and alternative example.

[0037] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A water turbine generator thrust pad inner shift monitoring system, comprising a base ring (9) provided with a thrust pad (5), a bearing pad (6) and a spacer block (7), characterized in that: It also includes a thrust pad sensor (1), a toe pad sensor (2), and a spacer block toe pad sensor (8) for measuring displacement. The thrust pad sensor (1) is opposite to the outer end face of the thrust pad (5), the toe pad sensor (2) is opposite to the outer end face of the toe pad (6), and the spacer block toe pad sensor (8) is opposite to the side end face of the toe pad (6).

2. The hydroelectric generator thrust pad inboard movement monitoring system of claim 1, wherein: The thrust pad sensor (1), the toe pad sensor (2), and the spacer block toe pad sensor (8) are all eddy current sensors.

3. The hydroelectric generator thrust pad migration monitoring system of claim 1, wherein: The thrust bearing sensor (1) is arranged radially along the base ring (9).

4. The hydroelectric generator thrust pad migration monitoring system of claim 1, wherein: The Towa sensor (2) is arranged radially along the base ring (9).

5. The hydroelectric generator thrust pad inboard migration monitoring system of claim 1, 3, or 4, wherein: The outer end face of the thrust pad (5) is flush with the outer end face of the toe pad (6), and the measurement reference surface of the thrust pad sensor (1) is flush with the measurement reference surface of the toe pad sensor (2).

6. The hydroelectric generator thrust pad migration monitoring system of claim 1, wherein: The spacer block Towa sensor (8) is arranged tangentially along the base ring (9).

7. The hydroelectric generator thrust pad migration monitoring system of claim 1 or 6, wherein: The measuring reference surface of the spacer block Towa sensor (8) is flush with the side end face of the spacer block (7), and the gap between the Towa (6) and the spacer block (7) is at least 2 mm.

8. The hydroelectric generator thrust pad migration monitoring system of claim 1, wherein: The thrust pad sensor (1), the toe pad sensor (2), and the spacer block toe pad sensor (8) are all fixed to the sensor bracket (3) by threaded assembly, and the sensor bracket (3) is fixed to the base ring (9).

9. The hydroelectric generator thrust pad migration monitoring system of claim 1, wherein: The thrust pad (5) is provided on the support pad (6), and a spring bundle is provided between the support pad (6) and the base ring (9). A spacer block (7) is provided between two adjacent support pads (6), and the spacer block (7) is fixed on the base ring (9).

10. The hydroelectric generator thrust pad migration monitoring system of claim 1, wherein: The thrust pad (5) and the toe pad (6) are arranged evenly in a circumferential direction, with one thrust pad (5) corresponding to one toe pad (6).

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