During the operation of the steam turbine, the casing will produce thermal expansion due to temperature changes. If the thermal expansion exceeds the design allowable range, it may cause casing deformation, seal failure, and even cause serious accidents. Therefore, it is of great significance to monitor the thermal expansion of the steam turbine casing in real time and accurately. TD-2-35 thermal expansion sensor, as a sensor based on LVDT technology, is widely used in the measurement of thermal expansion of steam turbine casing due to its high precision, high stability and good anti-interference ability.

Structure and characteristics of TD-2-35 thermal expansion sensor

TD-2-35 thermal expansion sensor is a LVDT sensor specially designed for measuring thermal expansion of steam turbine casing. It uses special materials and structures, with high measurement accuracy, good stability and strong anti-interference ability. The core component of the sensor is a precision LVDT converter, and its peripheral circuits include excitation power supply, signal processing circuit and output interface. In addition, the sensor is also equipped with auxiliary components such as protective housing and mounting bracket to ensure long-term stable operation in harsh industrial environments.

Detailed explanation of the measurement process

1. Installation: Install the sensor TD-2-35 on both sides of the absolute dead point of the turbine casing to ensure that the sensor is in close contact with the casing and there is no relative movement. During the installation process, the protection level of the sensor needs to be considered to ensure that it can work normally in harsh environments such as high temperature, high pressure, and high vibration.

2. Power-on and calibration: After the sensor is powered on, the primary coil generates an alternating magnetic field, the iron core is in the middle position, and the output voltage is zero. At this time, the sensor needs to be calibrated to determine the linear relationship between the output voltage and displacement. During the calibration process, a standard displacement source needs to be used to apply a known displacement to the sensor and record the output voltage. The actual output voltage can be converted into a displacement value through the calibration curve.

3. Thermal expansion monitoring: As the temperature of the turbine increases during operation, the casing begins to expand. Since the sensor is in close contact with the casing, the iron core will move as the casing expands. The movement of the iron core changes the magnetic flux of the secondary coil, thereby generating an induced electromotive force. This induced electromotive force is converted into an output voltage proportional to the displacement after passing through the signal processing circuit.

4. Signal processing and display: The output voltage of the sensor TD-2-35 is converted into a DC voltage or current signal after demodulation, filtering and amplification. This signal can be received by the data acquisition system or monitoring system, and the expansion displacement of the casing can be displayed in real time. At the same time, the system can also warn or alarm abnormal situations according to the preset alarm threshold.

5. Data analysis and fault diagnosis: By analyzing the collected displacement data, we can understand the thermal expansion of the turbine casing and whether there is abnormal expansion or deformation. Combined with other monitoring data, such as temperature and pressure, fault diagnosis can be performed to timely discover and deal with potential safety hazards.

Through the above steps, the TD-2-35 thermal expansion sensor can effectively monitor the thermal expansion of the turbine casing and provide important data support for the safe operation of the turbine. By deeply understanding its working principle, structural characteristics and measurement process, we can make better use of this sensor to ensure the safe and stable operation of the turbine.

When looking for high-quality, reliable thermal expansion sensors, YOYIK is undoubtedly a choice worth considering. The company specializes in providing a variety of power equipment including steam turbine accessories, and has won wide acclaim for its high-quality products and services. For more information or inquiries, please contact the customer service below:

E-mail: sales@yoyik.com
Tel: +86-838-2226655
Whatsapp: +86-13618105229