Blade heating temperature accurate control system of gas turbine

Abstract

The utility model discloses a heating temperature accurate control system for a blade of a gas turbine. Comprising a heating induction coil, an induction heating power supply and an induction heating power regulator, wherein the heating induction coil is sleeved on the periphery of a heated blade and is not heated by the heated blade; the induction heating power supply is used for supplying power to the heating induction coil; the digital temperature sensor is used for detecting the heating temperature in real time; the digital / analog converter is used for performing digital / analog conversion on a digital temperature signal output by the digital temperature sensor; the analog control output is used for controlling the output power of the induction heating power supply according to an analog signal output by the digital / analog converter; the output end of the digital temperature sensor is connected with a data processor used for collecting and storing heating temperature data. The device is simple in structure, convenient to realize, high in working reliability, strong in anti-interference capability, convenient to maintain and repair, strong in practicability and good in using effect.

Description

Technical Field

[0001] The utility model belongs to the technical field of combustion turbine blade heating temperature control, and particularly relates to an accurate control system for the heating temperature of combustion turbine blades. Background Art

[0002] In order to verify whether the durability and service life of the blades can meet the safe use conditions during long-term use, it is necessary to continuously simulate the actual working temperature and state of the engine on a high-temperature fatigue test machine for 168 hours to conduct a compliance test of working performance and a final failure life test of some blades (if no failure occurs within 200 hours, the test will no longer be carried out). This scheme requires maintaining the temperature in a certain area within the blade working temperature range of 940°C ± 10°C all the time. However, in the prior art, there is still a lack of a combination of a combustion turbine blade heating temperature control system and equipment that can meet such usage requirements. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide an accurate control system for the heating temperature of combustion turbine blades aiming at the deficiencies in the above-mentioned prior art. The system has a simple structure, reasonable design, convenient implementation, high working reliability, strong anti-interference ability, convenient maintenance and repair, strong practicability, good use effect, and is convenient for popularization and use.

[0004] To solve the above technical problem, the technical scheme adopted by the utility model is: an accurate control system for the heating temperature of combustion turbine blades, which is characterized in that it includes a heating induction coil used to surround the outer periphery of the blade to be heated and not heated by the blade, an induction heating power supply used to supply power to the heating induction coil, an induction heating power regulator used to adjust the output power of the induction heating power supply, a digital temperature sensor connected in sequence and used to detect the heating temperature in real time, a digital-to-analog converter used to perform digital-to-analog conversion on the digital temperature signal output by the digital temperature sensor, and an analog control output used to control the output power of the induction heating power supply according to the analog signal output by the digital-to-analog converter; a data processor for heating temperature data acquisition and storage is connected to the output end of the digital temperature sensor.

[0005] The above-mentioned accurate control system for the heating temperature of combustion turbine blades is characterized in that the induction heating power supply is an intermediate frequency induction heating power supply.

[0006] The above-mentioned accurate control system for the heating temperature of combustion turbine blades is characterized in that the digital temperature sensor is a digital infrared temperature sensor.

[0007] The above-mentioned accurate control system for the heating temperature of combustion turbine blades is characterized in that the data processor is a computer.

[0008] The utility model has the following advantages compared with the prior art:

[0009] 1. The design of the utility model is reasonable and easy to implement.

[0010] 2. Since the digital infrared temperature sensor is adopted in the utility model, the temperature measurement does not directly contact the heated blade, and it can be detected for a long time, ensuring the reliability of the work.

[0011] 3. The utility model uses a digital temperature sensor, a digital-to-analog converter and an analog control output to cooperate for temperature detection and control, so that the temperature change of induction heating can always be kept within the required range.

[0012] 4. The utility model uses a digital temperature sensor, a digital-to-analog converter and an analog control output to cooperate for temperature detection and control, and the influence of external interference signals on it is small.

[0013] 5. The structure of the utility model is simple, with few components used, extremely few faults, and is convenient for maintenance and repair.

[0014] 6. The utility model has strong practicability, good use effect and is convenient for popularization and use.

[0015] In summary, the utility model has a simple structure, reasonable design, easy implementation, high working reliability, strong anti-interference ability, convenient maintenance and repair, strong practicability, good use effect and is convenient for popularization and use.

[0016] Next, through the attached drawings and embodiments, the technical solution of the utility model will be further described in detail. Description of the Drawings

[0017] Figure 1 is the circuit principle block diagram of the utility model.

[0018] Description of the reference numerals in the drawings:

[0019] 1 - induction heating power supply; 2 - heating induction coil; 3 - induction heating power regulator;

[0020] 4 - digital temperature sensor; 5 - digital-to-analog converter; 6 - analog control output;

[0021] 7 - data processor; 8 - heated blade. Detailed Embodiment

[0022] As Figure 1As shown in the figure, the precise control system for the heating temperature of the gas turbine blade of the present utility model includes a heating induction coil 2 that is sleeved around the periphery of the blade 8 to be heated and is not heated by the blade 8 to be heated, an induction heating power supply 1 for supplying power to the heating induction coil 2, an induction heating power regulator 3 for adjusting the output power of the induction heating power supply 1, as well as a digital temperature sensor 4 that is connected in sequence and is used for real-time detection of the heating temperature, a digital-to-analog converter 5 for performing digital-to-analog conversion on the digital temperature signal output by the digital temperature sensor 4, and an analog control output 6 for controlling the output power of the induction heating power supply 1 according to the analog signal output by the digital-to-analog converter 5; the output end of the digital temperature sensor 4 is connected with a data processor 7 for collecting and storing heating temperature data.

[0023] In this embodiment, the induction heating power supply 1 is an intermediate frequency induction heating power supply.

[0024] In this embodiment, the digital temperature sensor 4 is a digital infrared temperature sensor.

[0025] In this embodiment, the data processor 7 is a computer.

[0026] The working principle of the present utility model is as follows: When starting to heat, the heating temperature is controlled by adjusting the output power of the induction heating power supply 1 through the induction heating power regulator 3. During the heating process, when the temperature changes, the digital temperature sensor 4 performs real-time detection on the heating temperature and outputs the detected signal to the digital-to-analog converter 5. The digital-to-analog converter 5 performs digital-to-analog conversion on the digital temperature signal output by the digital temperature sensor 4 and then outputs it to the analog control output 6. The analog control output 6 then outputs a control signal for the output power of the induction heating power supply 1 according to the temperature change situation, so that the heating temperature is always maintained within the range of ±5°C% of the required control temperature. At the same time, the temperature signal detected by the digital temperature sensor 4 is also transmitted to the data processor 7, and the data processor 7 saves the heating parameters.

[0027] The above is only a preferred embodiment of the present utility model, and it does not impose any limitations on the present utility model. Any simple modifications, changes, and equivalent structural changes made to the above embodiments according to the technical essence of the present utility model still fall within the protection scope of the technical solution of the present utility model.

Claims

1. An accurate control system for the heating temperature of a gas turbine blade, characterized in that: It includes a heating induction coil (2) which is used to surround the heated blade (8) and is not heated by the heated blade (8), an induction heating power supply (1) for supplying power to the heating induction coil (2), an induction heating power regulator (3) for regulating the output power of the induction heating power supply (1), and a digital temperature sensor (4) which is connected in sequence and is used to detect the heating temperature in real time, a digital-to-analog converter (5) for performing digital-to-analog conversion on the digital temperature signal output by the digital temperature sensor (4), and an analog control output (6) for controlling the output power of the induction heating power supply (1) according to the analog signal output by the digital-to-analog converter (5); a data processor (7) for collecting and storing heating temperature data is connected to the output end of the digital temperature sensor (4).

2. The precise control system for the heating temperature of a gas turbine blade according to claim 1, characterized in that: The induction heating power supply (1) is an intermediate frequency induction heating power supply.

3. The precise control system for the heating temperature of a gas turbine blade according to claim 1, characterized in that: The digital temperature sensor (4) is a digital infrared temperature sensor.

4. The accurate control system for the heating temperature of a gas turbine blade according to claim 1, characterized in that: The data processor (7) is a computer.

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