Real-time monitoring system for combustion chamber component of gas turbine

Abstract

The invention provides a real-time monitoring system for a combustion chamber component of a gas turbine, and the system comprises an infrared photoelectric detection unit which is used for collecting an infrared radiation signal of a target object of the gas turbine; the optical fiber transmission subsystem is used for processing the infrared radiation signal to obtain an infrared radiation signal of a preset frequency band and sending the infrared radiation signal of the preset frequency band to a photoelectric converter; the photoelectric converter is used for converting the infrared radiation signal of the preset frequency band into an electric signal and amplifying the electric signal to obtain amplified high-frequency signal data; the signal collecting and processing subsystem is used for analyzing and processing the high-frequency signal data to obtain temperature data of the gas turbine target object; wherein the gas turbine target object comprises a turbine blade and a nozzle. According to the technical scheme provided by the invention, real-time online monitoring and early warning can be carried out on the states of the combustion chamber nozzle, the turbine blade and other components.

Description

Technical Field

[0001] The present application relates to the technical field of gas turbine monitoring, and in particular to a real-time monitoring system for gas turbine combustion chamber components. Background Art

[0002] During the long-term operation of a gas turbine, the structural reliability mainly depends on the reliable operation of its hot end components. As an important part of the Brayton cycle of the gas turbine, the combustion chamber of the gas turbine fully burns the fuel in the combustion chamber space when the gas turbine is running, converts the chemical energy of the fuel into thermal energy, and increases the temperature of the gas working fluid. As the core component of the combustion chamber, the combustion chamber nozzle directly determines the performance and reliability of the combustion chamber. The ablation of the nozzle can often directly lead to the destruction of the flame organization in the combustion chamber, and the temperature field of the combustion chamber outlet section deviates from the design conditions. Along with the sharp deterioration of performance, it causes severe thermal shock to the flame tube, transition section, and turbine structure downstream of the combustion chamber, shortening the maintenance interval of the gas turbine and increasing maintenance costs.

[0003] After investigation, it is found that the existing inspection of the status of the combustion chamber nozzle components often needs to be carried out after the engine is shut down, by disassembling the engine or by borehole exploration. It is impossible to achieve online real-time monitoring of the working status of the combustion chamber nozzle, and it is also impossible to avoid the further damage to the engine structure caused by the nozzle being burned during the operation of the engine. When severe burning occurs, only the protection and control measures of the engine can be used, which cannot achieve the purpose of early warning and early prevention. Therefore, it is urgent to propose a solution that can monitor and warn gas turbines in real time. Summary of the invention

[0004] The present application provides a real-time monitoring system for gas turbine combustion chamber components, so as to at least solve the technical problem that it is impossible to realize online real-time monitoring and early warning of the working status of the combustion chamber nozzle.

[0005] The embodiment of the present application proposes a real-time monitoring system for gas turbine combustion chamber components, the system comprising: an infrared photoelectric detection unit, an optical fiber transmission subsystem, a photoelectric converter, and a signal acquisition and processing subsystem;

[0006] The infrared photoelectric detection unit is used to collect infrared radiation signals of the gas turbine target object;

[0007] The optical fiber transmission subsystem is used to process the infrared radiation signal to obtain an infrared radiation signal of a preset frequency band, and send the infrared radiation signal of the preset frequency band to the photoelectric converter;

[0008] The photoelectric converter is used to convert the infrared radiation signal of the preset frequency band into an electrical signal, and amplify the electrical signal to obtain high-frequency signal data after amplification;

[0009] The signal acquisition and processing subsystem is used to analyze and process the high-frequency signal data to obtain the temperature data of the gas turbine target object;

[0010] Wherein, the gas turbine target objects include: turbine blades and nozzles.

[0011] Preferably, the real-time monitoring system further comprises: a cooling and sweeping subsystem;

[0012] The cooling and sweeping subsystem is arranged between the infrared photoelectric detection unit and the optical fiber transmission subsystem;

[0013] The cooling and purging subsystem is used to perform gas cooling on the infrared photoelectric detection unit and to purge the infrared photoelectric detection unit in real time.

[0014] Furthermore, the infrared photoelectric detection unit includes: a probe and a reflective lens.

[0015] Furthermore, the cooling and purging subsystem is used to perform gas cooling on the probe of the infrared photoelectric detection unit and to purge the probe of the infrared photoelectric detection unit in real time.

[0016] Furthermore, the optical fiber transmission subsystem is also used to perform shunting and screening processing on the infrared radiation signal based on a preset target range frequency band to obtain an infrared radiation signal of a preset frequency band.

[0017] Further, the photoelectric converter includes: a signal amplifier;

[0018] The signal amplifier is used to amplify the infrared radiation signal in the preset frequency band.

[0019] Furthermore, the signal acquisition and processing subsystem is also used to determine the temperature data corresponding to the high-frequency signal data based on the relationship between the pre-calibrated frequency band and temperature, and use the temperature data as the temperature data of the gas turbine target object.

[0020] Furthermore, the signal acquisition and processing subsystem is also used to obtain the operating speed of the gas turbine and establish a corresponding relationship between the high-frequency signal data and the operating speed;

[0021] The signal acquisition and processing subsystem is further used to determine the actual position of the target object corresponding to the temperature data based on the corresponding relationship between the high-frequency signal data and the operating speed.

[0022] Furthermore, the real-time monitoring system also includes: an early warning module;

[0023] The early warning module is used to issue an audible and visual early warning when the temperature data is greater than a preset temperature threshold.

[0024] Furthermore, the real-time monitoring system further includes: a display module;

[0025] The display module is used to display the temperature data and the actual position of the target object corresponding to the temperature data.

[0026] The technical solution provided by the embodiments of the present application brings at least the following beneficial effects:

[0027] The present application proposes a real-time monitoring system for gas turbine combustion chamber components, the system comprising: an infrared photoelectric detection unit, an optical fiber transmission subsystem, an optoelectronic converter, and a signal acquisition and processing subsystem; the infrared photoelectric detection unit is used to collect infrared radiation signals of gas turbine targets; the optical fiber transmission subsystem is used to process the infrared radiation signals to obtain infrared radiation signals of a preset frequency band, and send the infrared radiation signals of the preset frequency band to the optoelectronic converter; the optoelectronic converter is used to convert the infrared radiation signals of the preset frequency band into electrical signals, and amplify the electrical signals to obtain high-frequency signal data after amplification; the signal acquisition and processing subsystem is used to analyze and process the high-frequency signal data to obtain the temperature data of the gas turbine target; wherein the gas turbine target includes: a combustion chamber nozzle. The technical solution proposed in the present application can perform real-time online monitoring and early warning of the status of components such as combustion chamber nozzles and turbine blades.

[0028] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0030] Figure 1 A first structural diagram of a real-time monitoring system for gas turbine combustion chamber components provided according to an embodiment of the present application;

[0031] Figure 2 A second structural diagram of a real-time monitoring system for gas turbine combustion chamber components provided according to an embodiment of the present application;

[0032] Figure 3 A third structural diagram of a real-time monitoring system for gas turbine combustion chamber components provided according to an embodiment of the present application;

[0033] Reference numerals

[0034] Infrared photoelectric detection unit 1, optical fiber transmission subsystem 2, photoelectric converter 3, signal acquisition and processing subsystem 4, cooling and purge subsystem 5, early warning module 6, display module 7. DETAILED DESCRIPTION

[0035] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0036] The present application proposes a real-time monitoring system for gas turbine combustion chamber components, the system comprising: an infrared photoelectric detection unit, an optical fiber transmission subsystem, an optoelectronic converter, and a signal acquisition and processing subsystem; the infrared photoelectric detection unit is used to collect infrared radiation signals of gas turbine targets; the optical fiber transmission subsystem is used to process the infrared radiation signals to obtain infrared radiation signals of a preset frequency band, and send the infrared radiation signals of the preset frequency band to the optoelectronic converter; the optoelectronic converter is used to convert the infrared radiation signals of the preset frequency band into electrical signals, and amplify the electrical signals to obtain high-frequency signal data after amplification; the signal acquisition and processing subsystem is used to analyze and process the high-frequency signal data to obtain temperature data of the gas turbine targets; wherein the gas turbine targets include: turbine blades and nozzles. The technical solution proposed in the present application can perform real-time online monitoring and early warning of the combustion chamber nozzle status.

[0037] A real-time monitoring system for gas turbine combustion chamber components according to an embodiment of the present application is described below with reference to the accompanying drawings.

[0038] Embodiment 1

[0039] Figure 1 FIG. 1 is a structural diagram of a real-time monitoring system for gas turbine combustion chamber components provided according to an embodiment of the present application, such as Figure 1 As shown, the system includes: an infrared photoelectric detection unit 1, an optical fiber transmission subsystem 2, a photoelectric converter 3, and a signal acquisition and processing subsystem 4;

[0040] The infrared photoelectric detection unit 1 is used to collect infrared radiation signals of the gas turbine target object;

[0041] The optical fiber transmission subsystem 2 is used to process the infrared radiation signal to obtain an infrared radiation signal of a preset frequency band, and send the infrared radiation signal of the preset frequency band to the photoelectric converter 3;

[0042] The photoelectric converter 3 is used to convert the infrared radiation signal of the preset frequency band into an electrical signal, and amplify the electrical signal to obtain high-frequency signal data after amplification;

[0043] The signal acquisition and processing subsystem 4 is used to analyze and process the high-frequency signal data to obtain the temperature data of the gas turbine target object;

[0044] Wherein, the gas turbine target objects include: turbine blades and nozzles.

[0045] It should be noted that Figure 1 It is only an illustration of the real-time monitoring system for the gas turbine combustion chamber nozzle of the present application and does not limit the structure of the present invention.

[0046] In the embodiments of the present disclosure, Figure 2 As shown, the real-time monitoring system further includes: a cooling and sweeping subsystem 5;

[0047] The cooling and sweeping subsystem 5 is arranged between the infrared photoelectric detection unit 1 and the optical fiber transmission subsystem 2;

[0048] The cooling and purging subsystem 5 is used to perform gas cooling on the infrared photoelectric detection unit and to purge the infrared photoelectric detection unit in real time.

[0049] It should be noted that the infrared photoelectric detection unit 1 includes: a probe and a reflective lens.

[0050] The radiation energy of the target object can be collected by using the probe of the infrared photoelectric detection unit 1 and the reflective lens at the bottom.

[0051] Furthermore, the cooling and purging subsystem 5 is used to perform gas cooling on the probe of the infrared photoelectric detection unit 1 and to purge the probe of the infrared photoelectric detection unit in real time.

[0052] It should be noted that the cooling and purge subsystem 5 can be used to perform gas cooling on the infrared probe, reduce the probe temperature, and improve the harsh environment in the gas flow channel of the gas turbine where the high-temperature probe is located. At the same time, clean air is used to purge the probe in real time to ensure the cleanliness of the probe, prevent it from being attached by pollutants in the gas flow channel of the gas turbine, and ensure detection accuracy.

[0053] In the disclosed embodiment, the optical fiber transmission subsystem 2 is further used to perform shunting and screening processing on the infrared radiation signal based on a preset target range frequency band to obtain an infrared radiation signal of a preset frequency band.

[0054] It should be noted that optical fibers of different materials and structures have different response characteristics to optical signals of different wavelengths. The optical fiber transmission system needs to be designed to filter out light waves in the target frequency range to obtain better transmission effects.

[0055] It should be noted that the photoelectric converter includes: a signal amplifier;

[0056] The signal amplifier is used to amplify the infrared radiation signal in the preset frequency band.

[0057] It should be noted that, through the signal amplifier, the infrared radiation signal of the preset frequency band is processed into a data source that can be used for subsequent signal acquisition and processing system analysis.

[0058] In the disclosed embodiment, the signal acquisition and processing subsystem 4 is further used to determine the temperature data corresponding to the high-frequency signal data based on the relationship between the pre-calibrated frequency band and temperature, and use the temperature data as the temperature data of the gas turbine target object.

[0059] It should be noted that the physical temperature value is restored by using the relationship between infrared radiation and temperature that has been calibrated in advance.

[0060] Furthermore, the signal acquisition and processing subsystem 4 is also used to obtain the operating speed of the gas turbine and establish a corresponding relationship between the high-frequency signal data and the operating speed;

[0061] The signal acquisition and processing subsystem 4 is further used to determine the actual position of the target object corresponding to the temperature data based on the corresponding relationship between the high-frequency signal data and the operating speed.

[0062] It should be noted that, in combination with the rotation information of the engine turbine components (wherein the operating speed of the engine, i.e. the rotation speed of the turbine blades, belongs to the operating data of the engine), the obtained temperature signal is matched with the actual position of the target object (through the pre-established relationship between the scanning frequency and the rotation speed of the engine blades, the measured abnormal temperature signal is aligned with the specific actual position of the engine turbine blades), so as to restore the real-time data of the surface temperature of the target object.

[0063] In the embodiments of the present disclosure, Figure 3 As shown, the real-time monitoring system also includes: an early warning module 6;

[0064] The warning module 6 is used to issue an audible and visual warning when the temperature data is greater than a preset temperature threshold.

[0065] Further, such as Figure 3 As shown, the real-time monitoring system further includes: a display module 7;

[0066] The display module 7 is used to display the temperature data and the actual position of the target object corresponding to the temperature data.

[0067] It should be noted that the temperature distribution of the target object is displayed on the computer to achieve real-time online and accurate monitoring of the combustion chamber nozzle ablation phenomenon.

[0068] In summary, the real-time monitoring system for gas turbine combustion chamber components proposed in this embodiment has the following advantages: 1) real-time online monitoring of the combustion chamber nozzle status; 2) timely warning of combustion chamber nozzle ablation damage; 3) accurate assessment of the gas turbine turbine operating status.

[0069] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0070] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0071] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A real-time monitoring system for gas turbine combustion chamber components, characterized in that: The system includes: an infrared photoelectric detection unit, an optical fiber transmission subsystem, a photoelectric converter, and a signal acquisition and processing subsystem; The infrared photoelectric detection unit is used to collect infrared radiation signals of the gas turbine target object; The optical fiber transmission subsystem is used to process the infrared radiation signal to obtain an infrared radiation signal of a preset frequency band, and send the infrared radiation signal of the preset frequency band to the photoelectric converter; The photoelectric converter is used to convert the infrared radiation signal of the preset frequency band into an electrical signal, and amplify the electrical signal to obtain high-frequency signal data after amplification; The signal acquisition and processing subsystem is used to analyze and process the high-frequency signal data to obtain the temperature data of the gas turbine target object; Wherein, the gas turbine target objects include: turbine blades and nozzles.

2. The real-time monitoring system according to claim 1, characterized in that: The real-time monitoring system also includes: a cooling and purge subsystem; The cooling and sweeping subsystem is arranged between the infrared photoelectric detection unit and the optical fiber transmission subsystem; The cooling and purging subsystem is used to perform gas cooling on the infrared photoelectric detection unit and to purge the infrared photoelectric detection unit in real time.

3. The real-time monitoring system according to claim 2, characterized in that: The infrared photoelectric detection unit comprises: a probe and a reflective lens.

4. The real-time monitoring system according to claim 3, characterized in that: The cooling and purging subsystem is used to perform gas cooling on the probe of the infrared photoelectric detection unit and to perform real-time purging on the probe of the infrared photoelectric detection unit.

5. The real-time monitoring system according to claim 4, characterized in that: The optical fiber transmission subsystem is also used to perform shunting and screening processing on the infrared radiation signal based on a preset target range frequency band to obtain an infrared radiation signal of a preset frequency band.

6. The real-time monitoring system according to claim 5, characterized in that: The photoelectric converter comprises: a signal amplifier; The signal amplifier is used to amplify the infrared radiation signal in the preset frequency band.

7. The real-time monitoring system according to claim 6, characterized in that: The signal acquisition and processing subsystem is further used to determine the temperature data corresponding to the high-frequency signal data based on the relationship between the pre-calibrated frequency band and temperature, and use the temperature data as the temperature data of the gas turbine target object.

8. The real-time monitoring system according to claim 7, characterized in that: The signal acquisition and processing subsystem is also used to obtain the operating speed of the gas turbine and establish a corresponding relationship between the high-frequency signal data and the operating speed; The signal acquisition and processing subsystem is further used to determine the actual position of the target object corresponding to the temperature data based on the corresponding relationship between the high-frequency signal data and the operating speed.

9. The real-time monitoring system according to claim 8, characterized in that: The real-time monitoring system also includes: an early warning module; The early warning module is used to issue an audible and visual early warning when the temperature data is greater than a preset temperature threshold.

10. The real-time monitoring system according to claim 9, characterized in that: The real-time monitoring system also includes: a display module; The display module is used to display the temperature data and the actual position of the target object corresponding to the temperature data.

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