YOYIK provides a special sensor: the thermal expansion sensor TD-2. For general industrial users, it may be a relatively rarely used type. However, for power plant users, thermal expansion sensors are important components for monitoring steam turbine casing expansion parameters and protecting the normal operation of steam turbine. So what is a thermal expansion sensor TD-2? Now YOYIK will provide you with detailed answers.

What is TD-2 thermal expansion sensor?

The thermal expansion sensor TD-2 is a sensor used for measuring the thermal expansion of steam turbine casing. Its working principle is based on the principle of thermal expansion, which means that objects will expand when heated. Specifically, according to the principle of thermal expansion, when the sensor is subjected to temperature changes, the length or volume of the sensor will change slightly. This change can be represented by the thermal expansion coefficient of the sensor material. Generally, the coefficient of thermal expansion is a constant value, so the change in the sensor output signal only depends on the temperature change of the object being measured.

Generally, the output signal of the thermal expansion sensor can be read by the measuring instrument Thermal Expansion Monitor DF9032 MaxA. The thermal expansion monitor can convert the TD-2 output signal into a digital signal that can be used to represent the expansion of the measured object. Measuring instruments usually need to be calibrated to ensure the accuracy of measurement results.

What does thermal expansion sensor consist of?

The thermal expansion sensor TD-2 is mainly composed of a case, elastic elements, mechanical pointers, and pointer plates. Its internal structure is simple and reliable, and it can effectively measure the thermal expansion of steam turbines. The following YOYIK describes in detail the various components of the thermal expansion sensor.

1. Case: The case of TD-2 is usually made of stainless steel or alloy material, with good high-temperature and corrosion resistance, and can adapt to the working requirements of steam turbines in harsh environments such as high temperature and high pressure.

2. Core: The core of TD-2 is usually made of stainless steel or alloy material, and its shape and size will undergo slight deformation with temperature changes, thereby realizing the measurement of thermal expansion. One end of the core is fixed inside the case and the other end is connected to a mechanical pointer.

3. Mechanical pointer: The mechanical pointer of TD-2 is usually made of magnetic stainless steel, and its position changes accordingly with the deformation of the elastic element, thereby realizing the measurement of thermal expansion. The mechanical pointer is connected to a pointer disk outside the housing via a magnetic rod.

4. Dial: The dial of TD-2 is usually made of aluminum alloy or plastic, and its scale range and interval can be designed according to specific application requirements. The pointer plate is fixed to the outside of the housing, which can clearly display the measurement results of thermal expansion.

The above is a basic introduction to the thermal expansion sensor TD-2. I hope YOYIK’s explanation can be helpful to you. If you have any further questions, please feel free to consult us.