In the industrial field, especially in the operation monitoring of steam turbines in power plants, the vibration velocity sensor SZ-6(K) is known as the “guardian” of steam turbines for its high precision, wide-band measurement capability and anti-lateral vibration characteristics. However, in humid environments, the performance and life of the sensor may be seriously affected. This article will explore in depth the protection strategy of the SZ-6(K) vibration velocity sensor in humid environments to ensure that it can continuously and accurately protect industrial safety.

I. The core advantages of the SZ-6(K) vibration velocity sensor

The SZ-6(K) vibration velocity sensor is designed for measuring mechanical vibrations, especially for vibration monitoring of low-speed machinery. Its core advantages are:

• The output signal is proportional to the vibration velocity: accurately reflects the speed change of mechanical vibration and provides users with reliable vibration data.
• Wide-band measurement capability: Whether it is high-frequency, medium-frequency or low-frequency vibration measurement occasions, SZ-6(K) can do it, showing excellent multi-band adaptability.
• Low output impedance: improve signal transmission efficiency, significantly improve the signal-to-noise ratio, and make the measurement results more accurate and reliable.
• Transverse vibration resistance: Maintain high measurement accuracy in complex multi-directional vibration environments.

These characteristics make the SZ-6(K) sensor perform well in vibration monitoring of various equipment such as rotating machinery and reciprocating machinery.

II. Impact of humid environment on sensors

The impact of humid environment on sensors is multifaceted, mainly including:

Humidity affects circuit stability: High humidity may cause the stability of the sensor’s internal circuit to decrease and the output signal to be inaccurate.

Component corrosion: Long-term exposure to high humidity may cause corrosion to the internal components of the sensor, further affecting the measurement accuracy and reliability.

Short circuit risk: The combined effect of dust and humid environment may cause the sensor to short-circuit or damage the internal components.

For the SZ-6(K) vibration velocity sensor, humid environment also poses a potential threat, so it is crucial to take effective protective measures.

II. Protection strategy of SZ-6(K) sensor in humid environment

In order to ensure that the SZ-6(K) vibration sensor can work stably and accurately in humid environment, the following protection strategies can be adopted:

Shell protection and sealing

Use stainless steel shell: The SZ-6(K) sensor shell adopts stainless steel shell laser welding process, and the protection level can reach IP65, which effectively prevents rust and moisture intrusion.

Cable sealing: Use waterproof materials such as silicone rubber to seal the cable to ensure that there is no moisture penetration at the connection between the cable and the sensor.

Optimization of installation position and method

Choose a suitable installation position: Try to avoid installing the sensor in an area directly exposed to water vapor or humid environment. If it must be installed in such an area, ensure that there is a shield above the sensor to reduce direct contact with water vapor.

Tilted installation: When possible, install the sensor at an angle so that water droplets are not easy to accumulate on the sensor surface.

Use dehumidification and drying equipment

Install a dehumidifier: Install a dehumidifier near the sensor to reduce the ambient humidity and reduce the impact of water vapor on the sensor.

Use desiccant: Place desiccant bags around the sensor to absorb moisture in the air and keep the environment dry.

Regular maintenance and inspection

Regularly check the sensor status: Regularly check the sensor, including appearance inspection, cable connection inspection and functional test, to ensure that the sensor is in good working condition.

Cleaning and drying: When moisture accumulation or contamination is found on the sensor surface, wipe it clean with a dry and clean cloth in time, and perform necessary drying.

Adopt shielding and protection measures

Electromagnetic shielding: Although the SZ-6(K) sensor itself has a certain ability to resist electromagnetic interference, electromagnetic interference may be enhanced in a humid environment. Therefore, electromagnetic shielding measures should be adopted when necessary to reduce the impact of electromagnetic interference on the sensor.

Install a protective cover: Add a protective cover to the sensor to reduce the direct impact of external factors such as water vapor and dust on the sensor.

In the turbine vibration monitoring project of a thermal power plant, the temperature and humidity in the plant are generally high, and the sensor often fails. According to the above protection strategy, the following measures can be taken: install the sensor under the shield, use silicone rubber to seal the cable connection, place a desiccant bag around the sensor, and perform regular inspection and maintenance. These measures can effectively extend the service life of the sensor and improve the accuracy of the monitoring data.

When looking for high-quality, reliable vibration 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

Yoyik offers various types of spare parts for steam turbines, generators, boilers in power plants:
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