In the complex and precise operation system of steam turbine, speed, as a key parameter, plays a decisive role in the stable operation and performance of the equipment. Steam turbine speed sensor ZS04 – 80mm shoulders the important task of accurately measuring the speed of steam turbine, like a loyal “speed guard”, escorting the reliable operation of steam turbine.

Working principle

Steam turbine speed sensor ZS04-80mm usually works based on the principle of electromagnetic induction. Its internal structure is exquisite, mainly composed of sensing elements and signal processing circuits. When the rotating parts of the steam turbine, such as a gear plate with a specific tooth shape, rotate at high speed near the sensor, the change in the gap between the teeth will cause the alternating change of the magnetic field around the sensor. This dynamic change of the magnetic field is keenly captured by the sensing element, and then an induced electromotive force is generated inside the sensing element. Simply put, it is like in a constantly changing magnetic field, the sensing element is like a hardworking “generator”, continuously generating corresponding electrical signals according to the changing laws of the magnetic field.

The generated induced electromotive force signal is then transmitted to the signal processing circuit. In this circuit, the signal is first amplified to enhance the weak induction signal to a strength that is convenient for subsequent processing. Then, the original induction signal is converted into a standard square wave pulse signal through a shaping circuit. The frequency of these square wave pulse signals is closely related to the speed of the steam turbine. The higher the speed, the more pulses are generated per unit time, and vice versa. By accurately measuring the frequency of these pulse signals and combining them with the pre-set conversion relationship, the real-time speed of the steam turbine can be accurately calculated.

Performance characteristics

1. High-precision measurement: Steam turbine speed sensor ZS04-80mm stands out for its excellent measurement accuracy. In the case of a measurement range of 5 – 20KHz, it can achieve extremely accurate speed measurement, providing a reliable data basis for the operation control of the steam turbine. This high-precision measurement capability allows even extremely small changes in speed to be captured promptly and accurately during the operation of the steam turbine. For example, in key stages such as turbine startup, speed increase, speed decrease, and load adjustment, the sensor can accurately reflect the dynamic changes in speed, ensuring that the control system can make timely and appropriate responses based on accurate speed information, thereby maintaining the stable operation of the turbine.

2. High reliability: The sensor fully considers the complexity and severity of the turbine operating environment during design and manufacturing, and adopts a series of measures to ensure its high reliability. In terms of material selection, 304 stainless steel is selected as the shell material. This material has good corrosion resistance and mechanical strength, and can effectively resist adverse factors such as high temperature, high pressure, humidity, and possible chemical corrosion in the turbine operating environment, protecting the internal precision sensing components and circuits from damage. At the same time, in terms of circuit design, advanced anti-interference technology is used, so that the sensor can still output measurement signals stably and accurately in the face of complex electromagnetic interference, greatly reducing the measurement error and signal fluctuation caused by interference, and providing a solid guarantee for the long-term stable operation of the turbine.

3. Wide operating temperature range: During the operation of the turbine, its operating temperature will fluctuate significantly with changes in operating conditions. The ZS04-80mm speed sensor has a wide operating temperature range of -30℃ to +120℃, which can easily adapt to the temperature changes of the steam turbine at different operating stages. Whether in the low temperature environment at the beginning of the turbine startup or in the high temperature conditions when running at full load, the sensor can always maintain stable performance to ensure that the accuracy of the speed measurement is not affected by temperature. This feature enables the turbine to obtain reliable speed monitoring under various environmental conditions, effectively improving the adaptability and reliability of equipment operation.

4. Good vibration resistance: The steam turbine will generate strong vibration during operation, which is a huge test for the performance of the sensor. The ZS04-80mm speed sensor has been carefully designed and optimized to have excellent vibration resistance. Its internal structure is compact, and special fixing and buffering measures are used between the various components to effectively reduce the impact of vibration on the sensor. Even in the case of severe vibration during the operation of the steam turbine, the sensor can maintain a stable working state to ensure that the accuracy and stability of the measurement signal are not disturbed. This good vibration resistance enables the sensor to work reliably in harsh vibration environments, providing strong support for the safe operation of the steam turbine.

5. Easy installation: In practical applications, the installation of the ZS04-80mm speed sensor is very easy. Its thread specifications are M16×1×80mm or M12×1×80mm (customizable according to customer needs). This standardized design allows the sensor to be easily installed at a specific position on the turbine. During the installation process, you only need to install it according to the specified installation gap (generally 1-5mm) to ensure that the relative position between the sensor and the rotating part being measured is accurate, and then the installation can be completed. The easy installation feature not only reduces the installation cost and time, but also improves the efficiency of equipment maintenance and overhaul, bringing great convenience to users.

Application

1. Steam turbine speed monitoring: During the operation of the steam turbine, it is crucial to monitor the speed in real time and accurately. The Steam turbine speed sensor ZS04-80mm continuously and accurately measures the speed of the steam turbine and transmits the measurement data to the control system in real time, providing operators with intuitive and accurate information on the operation status of the steam turbine. Based on these speed data, operators can timely understand the operation of the steam turbine and determine whether the equipment is in normal operation. For example, during the start-up of the steam turbine, by monitoring the speed, it can be ensured that the steam turbine increases speed smoothly according to the predetermined speed increase curve, avoiding damage to the equipment due to too fast or too slow speed increase; when the steam turbine is operating normally, real-time monitoring of the speed can timely detect abnormal speed fluctuations, so as to take appropriate measures to adjust and ensure the stable operation of the steam turbine.

2. Overspeed protection: During the operation of the steam turbine, once overspeed occurs, it will pose a great threat to the safety of equipment and personnel. As a key component of the overspeed protection system, the ZS04 – 80mm speed sensor can monitor the speed of the steam turbine in real time. When the speed exceeds the preset safety threshold, the sensor will quickly transmit the overspeed signal to the protection system. After receiving the signal, the protection system will immediately take corresponding protection measures, such as quickly closing the steam inlet valve of the steam turbine to quickly decelerate the steam turbine to avoid serious equipment damage and safety accidents caused by overspeed. This timely and reliable overspeed protection function provides a solid line of defense for the safe operation of the steam turbine.

3. Cranking speed measurement: During the cranking process after the turbine is shut down, the cranking speed needs to be accurately measured to ensure that the turbine rotor can be cooled evenly and to prevent bending and deformation caused by uneven heating of the rotor. The ZS04-80mm speed sensor can accurately measure the cranking speed and provide reliable data support for the cranking operation. The operator can reasonably adjust the operating parameters of the cranking device according to the speed data measured by the sensor to ensure the smooth progress of the cranking process, thereby effectively protecting the safety of the turbine rotor.

4. Performance optimization and fault diagnosis: In addition to the above direct application scenarios, the speed data provided by the ZS04-80mm speed sensor can also be used for performance optimization and fault diagnosis of the turbine. By conducting in-depth analysis of the speed data accumulated over a long period of time, technicians can understand the operating performance of the turbine under different working conditions and find out the optimal parameter range for the equipment operation, thereby optimizing and adjusting the operation of the turbine and improving the operating efficiency and economy of the equipment. At the same time, when a turbine fails, abnormal changes in speed data can often provide important clues for fault diagnosis. By analyzing the changing trend and fluctuation of the speed data and the correlation with other operating parameters, technicians can quickly and accurately determine the cause of the fault, formulate corresponding maintenance plans, shorten the equipment downtime, and improve the availability of the equipment.

The Steam turbine speed sensor ZS04-80mm plays an irreplaceable and important role in the operation of the steam turbine with its unique working principle, excellent performance characteristics and a wide range of application scenarios. It provides a strong guarantee for the safe, stable and efficient operation of the steam turbine and is an indispensable key component in the modern steam turbine control system. With the continuous advancement of science and technology and the continuous improvement of the level of industrial automation, it is believed that the ZS04 – 80mm speed sensor will also be continuously optimized and upgraded to make greater contributions to the development of the steam turbine industry.

By the way, we have been supplying spare parts for power plants around the world for 20 years, and we have rich experience and hope to be of service to you. Looking forward to hearing from you. My contact information is as follows:

Tel: +86 838 2226655

Mobile/Wechat: +86 13547040088

QQ: 2850186866

Email: sales2@yoyik.com