Working principle of thermal expansion sensor for steam turbine

TD-2-25 TD-2-35 TD-2-50 displacement sensorTD-2 turbine thermal expansion displacement sensor

1. Overview:

TD-2Thermal expansion sensor is a sensor designed for measuring the expansion displacement of steam turbine units in the steam turbine industry. It has two indicators: on-site and remote transmission. The on-site indication has a large field of view and uses an intermediate frequency displacement sensor as the sensing element; The remote indication has good linearity, strong anti-interference ability, simple structure, is not easily damaged, good reliability, can be used continuously for a long time, and outputs a constant current. It has been selected by domestic large and medium-sized steam turbine manufacturers, and can also be used in other precision displacement measurement scenarios. Matching connectionLH6072The series displacement monitoring and protection instrument can measure the cylinder expansion of steam turbines.

2、 Steam turbine installationTD-2The important role of thermal expansion sensors

During the start-up and shutdown of a steam turbine, or during changes in a specific process, most of the machine's casing undergoes thermal expansion. If the expansion on both sides of the casing is uneven, the casing will tilt or tilt, causing significant stress between the casing and the foundation. The resulting misalignment can have serious consequences, and this undesirable situation is usually the result of the sliding pin system getting stuck.TD-2The thermal expansion sensor is used to measure the expansion value of the casing relative to the foundation. The thermal expansion sensor needs to be installed on both sides of the dead center of the casing, and the difference between the two indicates the deformation of the casing. An alarm can be set to prompt the operator to take early measures. Simultaneously connected with displacement monitoring instrument, it can output standard4-20mACurrent can be used with variousDCS\\PLCThe system is connected and has alarm and danger relay outputs to protect the safe and reliable operation of the machine.

3、 Main functions

Monitoring and protection of thermal expansion of turbine casing.

4、 Electrical indicators:

Travel range:

TD-2Thermal expansion sensor:0～25、35The50mm

Li Magnetic:1500Hz，1～20VAC

line sex Degree: ± of effective full range0.25%

5、 Physical indicators:

External dimensions: see dimension diagram TD-2 turbine thermal expansion displacement sensor

6、 Environmental indicators:

Operating temperature-30to+100 ℃

Relative humidity: ≤90%non-condensing

7、 Ordering Guide:

TD-2Thermal expansion sensor:TD-2-XXSelect range