The speed of a steam turbine is one of the important parameters of its operating state, which is directly related to the safe, stable and efficient operation of the unit. Therefore, it is particularly important to monitor and control the speed of the steam turbine accurately and in real time. The magnetoresistive rotational speed sensor CS-1-D-065-05-01 has been widely used in the field of steam turbine speed measurement due to its high precision, high reliability and good anti-interference ability.
I. Application environment of steam turbine speed measurement
The application environment of steam turbine speed measurement is complex and changeable, mainly including the following aspects:
1. High temperature and high-pressure environment: The steam turbine will produce high temperature and high-pressure steam during operation, which puts forward extremely high temperature and pressure resistance requirements for the speed sensor. The sensor must be able to work stably in such a harsh environment to ensure the accuracy of the measurement.
2. High-speed rotation environment: The speed of the steam turbine is usually very high, which may reach thousands or even tens of thousands of revolutions per minute. This requires the speed sensor to have extremely high measurement accuracy and response speed to capture tiny speed changes.
3. Strong electromagnetic interference environment: There are a large number of electrical equipment around the steam turbine, such as generators, transformers, etc. The equipment will generate strong electromagnetic interference when working. The speed sensor must have good anti-interference ability to ensure the accuracy of the measurement results.
II. Anti-interference measures for magnetoresistive speed sensor CS-1-D-065-05-01
In order to cope with the above complex and changeable application environment, the rotational speed sensor CS-1-D-065-05-01 has taken the following anti-interference measures:
1. Sturdy shell and sealing design
The sensor adopts a stainless-steel threaded shell and is completely sealed inside. This design can effectively prevent external factors such as high temperature, high pressure steam and dust from damaging the internal components of the sensor. At the same time, the sealing design can also prevent the internal sensor from being affected by external electromagnetic interference and improve the accuracy of the measurement.
2. Special metal shielded soft wire
The output signal of the sensor adopts a special metal shielded soft wire, which has extremely strong anti-interference ability. The metal shielding layer can effectively shield external electromagnetic interference and ensure the accuracy and stability of the speed measurement signal. In addition, the design of the soft wire also makes the sensor more flexible and convenient during installation.
3. Application of electromagnetic induction principle
The magnetoresistive speed sensor CS-1-D-065-05-01 works on the principle of electromagnetic induction, and a permanent magnet is built inside to generate a magnetic field. When the speed measuring gear rotates, the top and bottom of the tooth are close to or away from the magnetic pole of the sensor, causing the magnetic field to change, and then inducing a periodically changing electromotive force in the coil. This working principle enables the sensor to generate electricity by itself without the need for an external power supply, thereby reducing dependence on external circuits and improving anti-interference capabilities.
4. Reasonable installation and wiring
Proper installation and wiring are essential to improving the anti-interference ability of the sensor. First, the metal shielding layer of the sensor’s lead wire needs to be grounded to ensure the accuracy of the measurement and eliminate external electromagnetic interference. Secondly, the sensor should avoid being close to strong magnetic fields or strong current conductors during operation to avoid affecting its measurement accuracy. In addition, the runout of the measured shaft may affect the measurement results of the sensor, so the gap needs to be adjusted appropriately during use to ensure the accuracy of the measurement results.
In terms of wiring, the sensor cable should use a 100% coverage foil shield and a braided outer shield with at least 80% coverage (mesh density) to effectively shield radiated noise. At the same time, the sensor cable should be as far away from strong electromagnetic interference sources such as large motors as possible to reduce the impact of interference signals on sensor output.
5. Requirements for the tooth shape of speed measuring gears
When the magnetoresistive speed sensor is used with a gear with an involute tooth shape, the detected signal is the best. Because the involute tooth shape can provide continuous magnetic flux changes, thereby ensuring that the sensor outputs a stable square wave pulse signal. If other tooth shapes such as rectangular teeth are used, the induced voltage waveform may appear as two peak signals, which are easily interfered by other signals, resulting in inaccurate counting.
In summary, the magnetoresistive rotational speed sensor CS-1-D-065-05-01 has a wide range of application prospects in the field of turbine speed measurement. Its sturdy housing and sealing design, special metal shielded soft wire, application of electromagnetic induction principle, and reasonable installation and wiring measures together constitute its strong anti-interference ability. This enables the sensor to work stably in complex and changeable application environments such as high temperature and high pressure, high-speed rotation, and strong electromagnetic interference, providing a strong guarantee for the safe, stable and efficient operation of the turbine.
When looking for high-quality, reliable rotational speed 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
Post time: Dec-17-2024