Sensor Speed Turbine CS-1 G-065-02-1 is a non-contact monitoring device designed for large rotating machinery and belongs to the category of magnetoelectric induction sensors. The sensor detects the speed change of the turbine shaft gear to achieve real-time monitoring of the unit’s operating status. It is widely used in steam turbine unit safety protection systems in thermal power, nuclear power, chemical industry and other fields.

Core functions

1. Accurate speed measurement

Using the Hall effect principle, it can capture speed changes in the range of 0-12000rpm with a resolution of ±0.05%FS. When the gear protrusion passes through the end face of the sensor, the magnetic field changes to generate a pulse signal, and the speed value is obtained by calculating the number of pulses per unit time.

2. Phase synchronization detection

The built-in dual-channel signal processing module can output speed signals and key phase signals at the same time, provide a phase reference for vibration analysis, and support the phase locking requirements of FFT spectrum analysis.

3. Intelligent diagnostic function

The integrated self-check circuit can monitor the sensor coil impedance (standard value 850Ω±5%) and insulation resistance (>100MΩ/500VDC) in real time, and trigger the alarm output when signal loss or waveform distortion is detected.

Technical features

1. Environmental adaptability design

The shell is made of 316L stainless steel by integral turning, with a protection level of IP68 and can withstand an ambient temperature of -40℃~+150℃. The interior is filled with special silicone to achieve three-proof (moisture-proof, salt spray-proof, and mildew-proof) protection to meet the application requirements of offshore platforms.

2. Enhanced electromagnetic compatibility

The double-layer shielding structure (copper mesh braided layer + aluminum foil layer) makes the RF interference suppression ratio reach 80dB, and passes the 10V/m field strength test of the IEC 61000-4-3 standard to ensure stable operation in the inverter bypass environment.

3. Installation optimization features

Configured with M18×1 threaded installation interface, with special clearance adjustment tooling (standard clearance 1.0mm±0.1mm), equipped with LED status indicator, green steady light indicates normal detection, red flashing indicates abnormal clearance.

Notes

1. Installation specifications

The recommended installation angle is ≤45°, and the distance between the sensor end face and the gear top circle must be controlled in the range of 0.8-1.2mm. After calibration with a laser rangefinder, it should be tightened according to the torque value of 50N·m to avoid zero drift caused by mechanical stress.

2. Signal cable management

Twisted-pair shielded cable (AWG20 specification recommended) must be used, and the shielding layer is grounded at one end. When wiring, it is necessary to maintain a spacing of >300mm with the power cable, and a magnetic ring is installed at the wire hole to suppress common-mode interference.

3. Maintenance cycle

Sensitivity calibration is required every 8000 hours of operation, and the output frequency f(rpm)=N×Z/60 (N is the number of teeth, Z is the measured number of pulses) is verified using a standard tachometer (accuracy ±0.01%). Check the sealing O-ring (made of fluororubber) regularly. It is recommended to replace it every 3 years.

4. Troubleshooting

When the output signal amplitude is lower than 5Vpp, check whether there is oil accumulation on the gear tooth top (the maximum allowable dirt thickness is ≤0.05mm). If signal jitter occurs, use an oscilloscope to observe the waveform. Normally, it should be a regular sine wave with a distortion rate of <3%.

The Sensor Speed Turbine CS-1 G-065-02-1 has passed the TSI (Turbine Supervisory Instrumentation) system integration certification and meets the requirements of the fourth edition of API 670. Its MTBF (mean time between failures) can reach 150,000 hours. It is a key monitoring component to ensure the safe operation of the turbine. Proper use and maintenance can significantly improve the availability of the unit and avoid economic losses caused by unplanned downtime.

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