A monitoring device for a turbine monitoring instrument

Abstract

The utility model provides a kind of steam turbine monitoring instrument monitoring device, it is related to steam turbine monitoring technical field, comprising: wide temperature sensor, the wide temperature sensor is used to monitor steam turbine bearing vibration, tile vibration, axial displacement, expansion difference parameter;The redundant power module is connected with the wide temperature sensor, provides stable power supply;Monitor module has analog output and switch output function, and is connected with the wide temperature sensor signal;Cabinet is used to install wide temperature sensor, redundant power module and monitor module.According to the utility model, wide temperature sensor is used to monitor steam turbine bearing vibration, tile vibration, axial displacement, expansion difference and other key parameters, it is stably arranged on bracket, with good shock resistance, to ensure that wide temperature sensor maintains stable installation state under the vibration environment generated by steam turbine operation, to ensure the accuracy of monitoring data.

Description

Technical Field

[0001] This utility model relates to the field of steam turbine monitoring technology, specifically to a steam turbine monitoring instrument and device. Background Technology

[0002] In existing TSI (turbine monitoring instrument) systems, such as the Vibro-meter VM600 monitoring system applied to a 660MW supercritical steam turbine generator unit, although it can effectively monitor key parameters of the steam turbine such as bearing vibration, bearing vibration, axial displacement, cylinder expansion, etc., after long-term operation, especially after more than 10 years of service, the system has begun to show a series of limitations and defects.

[0003] Current monitoring of low-pressure cylinder differential expansion and intermediate-pressure cylinder differential expansion uses a single-point configuration. This design lacks redundancy; if a sensor or its signal path fails, there is no backup signal to replace it, thus reducing the reliability of the protection signal and posing a potential threat to the safe operation of the unit. Therefore, this invention proposes a turbine monitoring instrument to improve the above-mentioned problems. Utility Model Content

[0004] Therefore, the technical problem to be solved by this utility model is to overcome the defect of monitoring failure that may be caused by a single sensor failure in the prior art, thereby providing a turbine monitoring instrument monitoring device.

[0005] To address the aforementioned problems, this utility model provides a turbine monitoring instrument device, comprising:

[0006] A wide-temperature sensor is used to monitor turbine bearing vibration, bearing vibration, axial displacement, and expansion differential parameters. The wide-temperature sensor is mounted on a bracket.

[0007] A redundant power supply module is connected to the wide-temperature sensor to provide stable power supply.

[0008] The monitoring module has analog output and digital output functions and is connected to the wide-temperature sensor signal.

[0009] A cabinet for installing the wide-temperature sensor, the redundant power supply module, and the monitor module;

[0010] An armored sensor extension cable enables seamless signal transmission between the wide-temperature sensor and the monitoring module.

[0011] Preferably, the wide-temperature sensor is also connected to an electromagnetic interference protection device for vibration sensor protection on the generator and exciter sides.

[0012] Preferably, the wide-temperature sensor includes at least nine sensor units, respectively disposed at different shaft sections and bearings of the device, for monitoring vibration signals in the X and Y directions of the shaft, displacement signals of the shaft, and bearing vibration signals.

[0013] Preferably, the cabinet is equipped with a backup power switch and a backup power terminal for automatically switching to the backup power supply in the event of a main power failure; the backup power terminal ensures that the system can be connected to an additional power source to enhance the system's power redundancy.

[0014] Preferably, the redundant power supply module is configured with power switching logic to realize automatic and seamless switching between the two power supplies. The redundant power supply module is equipped with a power status monitoring circuit, which is used to monitor the operating status of the redundant power supply module in real time to ensure stable power supply.

[0015] Preferably, the monitor module has: a three-way redundant signal output circuit for transmitting the monitoring signal to the DEH system for logic processing without error;

[0016] The layered and card-based design ensures signal quality and processing speed by equipping each important monitoring point with an independent signal processing card.

[0017] The turbine monitoring instrument device provided by this utility model has the following beneficial effects:

[0018] 1. This utility model uses a wide-temperature sensor to monitor key parameters such as turbine bearing vibration, bearing vibration, axial displacement, and differential expansion. It is stably mounted on a bracket and has good anti-vibration performance, which can ensure that the wide-temperature sensor maintains a stable installation state under the vibration environment generated by the turbine operation, thereby ensuring the accuracy of the monitoring data.

[0019] 2. This utility model also uses a monitoring module to convert sensor signals into data that can be read by the control system through analog and digital outputs, thereby realizing real-time monitoring of key parameters of the steam turbine;

[0020] 3. This utility model also improves the fault tolerance of the monitoring system by increasing the redundancy of the sensor, thus solving the problem of monitoring failure that may be caused by the failure of a single sensor. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the device architecture of this utility model. Detailed Implementation

[0022] like Figure 1 As shown, this utility model provides a turbine monitoring instrument device, which includes:

[0023] A wide-temperature sensor is used to monitor turbine bearing vibration, bearing vibration, axial displacement, and expansion differential parameters. The wide-temperature sensor is mounted on a bracket.

[0024] A redundant power supply module is connected to the wide-temperature sensor to provide stable power supply.

[0025] The monitoring module has analog output and digital output functions and is connected to the wide-temperature sensor signal.

[0026] A cabinet for installing the wide-temperature sensor, the redundant power supply module, and the monitor module;

[0027] An armored sensor extension cable enables seamless signal transmission between the wide-temperature sensor and the monitoring module. For example... Figure 1 As shown, a turbine monitoring instrument device addresses the problem of low reliability of protection signals in existing TSI systems due to the lack of redundancy in low-pressure cylinder differential pressure and high-medium-pressure cylinder differential pressure monitoring caused by single-point configuration. The device includes a wide-temperature sensor, a redundant power supply module, a monitoring module, a cabinet, and armored sensor extension cables.

[0028] Specifically, the wide-temperature sensor is used to monitor key parameters such as turbine bearing vibration, bearing vibration, axial displacement, and differential expansion. It is securely mounted on a dedicated bracket made of high-strength alloy material, providing excellent shock resistance and ensuring stable installation under the vibration environment generated during turbine operation, thus guaranteeing the accuracy of the monitoring data. The use of the wide-temperature sensor ensures accurate monitoring of the turbine's operating status even under extreme temperature conditions. A redundant power supply module provides uninterrupted power, enhancing system reliability. In principle, the monitor module converts sensor signals into data readable by the control system through analog and digital outputs, enabling real-time monitoring of key turbine parameters. In terms of effectiveness, the technical solution in this embodiment ensures the accuracy and stability of the monitoring signals, improving the reliability of unit protection. In other embodiments, increasing sensor redundancy can further enhance the fault tolerance of the monitoring system and address monitoring failures caused by a single sensor malfunction.

[0029] In some embodiments, the wide-temperature sensor is also connected to electromagnetic interference protection equipment for vibration sensor protection on the generator and exciter sides. For example... Figure 1As shown, the electromagnetic interference protection equipment is commercially available. Other electronic components and equipment not specified in this application are also commercially available. This equipment is specifically designed to provide protection for vibration sensors on the generator and exciter side. Since the generator and exciter generate strong electromagnetic interference during operation, it may affect the signal acquisition accuracy of the vibration sensor. The electromagnetic interference protection equipment adopts multi-layer shielding and filtering technology, which can effectively block external electromagnetic interference and ensure that the signal acquired by the sensor is true and reliable.

[0030] In some embodiments, the wide-temperature sensor includes at least nine sensor units, respectively disposed at different shaft segments and bearings of the device, for monitoring vibration signals in the X and Y directions of the shaft, shaft displacement signals, bearing bearing vibration signals, and expansion differential parameters. Figure 1 As shown, corresponding sensor units are arranged at the high-pressure cylinder shaft section, low-pressure cylinder shaft section, and various bearing positions of the steam turbine according to monitoring requirements. Among them, some sensor units are used to monitor the vibration signal in the X direction of the shaft, some are used to monitor the vibration signal in the Y direction of the shaft, and others are used to monitor the displacement signal of the shaft and the vibration signal of the bearing bearing, respectively. Through this multi-location, multi-parameter monitoring configuration, the status information of the steam turbine during operation can be comprehensively acquired.

[0031] Specifically, for acquiring the differential expansion parameter, the wide-temperature sensor achieves this by setting paired sensor units at key corresponding positions on the turbine rotor and cylinder. Specifically, one set of dedicated differential expansion monitoring sensor units is arranged at the journal near the thrust bearing on the rotor and at the corresponding stator position on the cylinder. These sensor units employ high-precision eddy current probes to collect the absolute expansion displacement of the rotor and cylinder in real time. The displacement signals collected by the two sets of sensor units are processed synchronously and then calculated in real time by the differential calculation circuit built into the monitor module to obtain the relative expansion difference between the rotor and cylinder, i.e., the differential expansion parameter. Simultaneously, to improve reliability, the differential expansion monitoring of both the high-pressure, intermediate-pressure, and low-pressure cylinders employs a redundant dual-sensor unit configuration. The two sets of sensor units independently collect signals and transmit them to the monitor module. The module ensures the accuracy of the differential expansion data through a signal comparison verification mechanism. When one set of sensor units fails, the system can automatically switch to the signal output of the other set.

[0032] In some implementations, the cabinet is equipped with a backup power switch and backup power terminals for automatic switching to backup power in the event of a main power failure; the backup power terminals ensure that the system can connect to an additional power source to enhance system power redundancy. For example... Figure 1 As shown, the backup power switch works in conjunction with the redundant power module to automatically switch to the backup power in the event of a main power failure; the backup power terminal provides an interface for the system to connect to an additional power source, which can further enhance the system's power redundancy and improve the system's reliability.

[0033] In some implementations, the redundant power supply module is configured with power switching logic to achieve automatic and seamless switching between two power sources. The redundant power supply module also includes a power status monitoring circuit for real-time monitoring of its operating status to ensure stable power supply. Figure 1 As shown, the redundant power supply module is connected to the wide-temperature sensor, providing it with a stable and reliable power supply. The redundant power supply module is equipped with advanced power switching logic, enabling automatic and seamless switching between the two power sources. When one power source fails, the power switching logic responds quickly, automatically switching to the other power source without affecting the normal operation of the wide-temperature sensor, ensuring continuous power supply. The redundant power supply module also includes a power status monitoring circuit, which monitors the module's operating status in real time, including parameters such as voltage and current. If any abnormal power supply operation is detected, a warning signal will be issued promptly, facilitating maintenance and further ensuring stable power supply.

[0034] In some implementations, the monitor module has: a three-way redundant signal output circuit for transmitting the monitoring signal to the DEH system for logical processing without error;

[0035] The layered, card-based design equips each key monitoring point with an independent signal processing card, ensuring both signal quality and processing speed. For example... Figure 1 As shown, the monitor module has analog and digital output functions, and connects to the wide-temperature sensor via signal lines, enabling it to receive various monitoring signals transmitted by the sensor. The monitor module features three redundant signal output circuits with independent signal transmission paths and isolation design, ensuring accurate transmission of monitoring signals to the DEH system for logic processing. This guarantees the DEH system can acquire turbine operating status information promptly and accurately. The monitor module employs a layered, card-based design, with each important monitoring point equipped with an independent signal processing card. This avoids mutual interference between signals from different monitoring points, ensuring signal quality and processing speed. Each signal processing card has a dedicated signal processing circuit, enabling rapid and accurate processing and analysis of received signals, improving the real-time performance and accuracy of monitoring. Technically, the three redundant signal output circuits and the layered, card-based design ensure the redundancy and independence of signal transmission. In principle, the redundant signal output circuit is based on a 3-out-of-2 logic, and the layered and card-based design reduces mutual interference between signals through physical isolation. In terms of effect, the technical solution in this embodiment improves the accuracy and speed of signal transmission and enhances the system's responsiveness.

[0036] Specifically, the armored sensor extension cable is used to realize signal transmission between the wide-temperature sensor and the monitoring module. It adopts a jointless design, which reduces the connection points in the signal transmission process and reduces the possibility of signal loss and interference. The outer layer of the armored sensor extension cable is made of high-strength armor material, which has good wear resistance, corrosion resistance and tensile strength, and can adapt to the complex environment of the steam turbine operation site, ensuring the stability and reliability of signal transmission.

[0037] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model. The above description is only a preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A monitoring device for a steam turbine monitoring instrument, characterized in that, include: A wide-temperature sensor is used to monitor turbine bearing vibration, bearing vibration, axial displacement, and expansion differential parameters. The wide-temperature sensor is mounted on a bracket. A redundant power supply module is connected to the wide-temperature sensor to provide stable power supply. The monitoring module has analog output and digital output functions and is connected to the wide-temperature sensor signal. A cabinet for installing the wide-temperature sensor, the redundant power supply module, and the monitor module; An armored sensor extension cable enables seamless signal transmission between the wide-temperature sensor and the monitoring module.

2. The turbine monitoring instrument device according to claim 1, characterized in that: The wide-temperature sensor is also connected to an electromagnetic interference protection device for vibration sensor protection on the generator and exciter sides.

3. The turbine monitoring instrument device according to claim 2, characterized in that: The wide-temperature sensor includes at least nine sensor units, which are respectively configured at different shaft sections and bearings of the device, for monitoring vibration signals in the X and Y directions of the shaft, shaft displacement signals, and bearing vibration signals.

4. The turbine monitoring instrument device according to claim 1, characterized in that: The cabinet is equipped with a backup power switch and a backup power terminal, which are used to automatically switch to the backup power in the event of a main power failure; the backup power terminal ensures that the system can be connected to an additional power source to enhance the system's power redundancy.

5. The turbine monitoring instrument device according to claim 1, characterized in that: The redundant power supply module is equipped with power switching logic to achieve automatic and seamless switching between two power supplies. The redundant power supply module is also equipped with a power status monitoring circuit, which is used to monitor the operating status of the redundant power supply module in real time to ensure stable power supply.

6. The turbine monitoring instrument device according to claim 1, characterized in that: The monitor module has three redundant signal output circuits for transmitting the monitoring signals to the DEH system for logic processing without error. The layered and card-based design ensures signal quality and processing speed by equipping each important monitoring point with an independent signal processing card.

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