How to Correctly Install the Speed Sensor of Diesel Generator Set

The speed sensor of diesel generator set is just like the literal meaning, which monitors the speed of the diesel generator set in real time. The quality of the speed sensor directly affects the stability and safety of the diesel generator set, so it is very important to ensure the quality of the speed sensor. It is also very important that the installation of the sensor should be taken seriously, and only the correct and standardized installation can avoid leaving the hidden trouble of the diesel generator set. The following Dingbo Power will introduce you how to correctly install the speed sensor of the diesel generator set.

1. The distance between the sensor and the flywheel of the diesel generator set is too far or too close. Generally, the distance is about 2.5+0.3mm. If the distance is too far, the signal may not be sensed, and too close may damage the working surface of the sensor. Since the flywheel will move radially (or axially) during high-speed operation, too close a distance poses a great threat to the safety of the sensor. It has been found that the working surfaces of several probes have been scratched. According to actual experience, the distance is generally around 2mm, which can be measured with a feeler gauge.

2. Due to the vibration of the mounting bracket of the sensor when the diesel generator set is running, the measurement signal is inaccurate, and the alternating magnetic field produces irregular changes, which causes fluctuations in the speed indication. Treatment method: Reinforce the bracket, which can be welded to the diesel engine body.

3. Since the oil thrown by the flywheel sticks to the working surface of the sensor, it has a certain influence on the measurement result. If an oil-proof cover is installed on the flywheel, good results can be achieved.

4. The failure of the speed transmitter makes the output signal unstable, causing the speed indication to fluctuate or even no speed indication, and due to its unstable operation and poor contact of the wiring head, it will trigger the electrical overspeed protection malfunction. For this, the frequency generator can be used to input the frequency signal to verify the speed transmitter, and the terminals are tightened. Since the speed transmitter is controlled by PLC microcomputer, it can be readjusted or replaced if necessary.

The above is the correct installation method of the speed sensor of diesel generator set. With the popularization of the automation fuction of diesel generator set , the use of the speed sensor become essential. The user must understand clearly its installation matters, and at the same time use the diesel generator set in daily use. At that time, the user should always pay attention to whether the sensor is normal. If any abnormality is found, please contact the generator manufacturer for on-site inspection. Through the above study, have you learned about the installation of the speed sensor of diesel generator sets? You are always welcomed to contact Dingbo Power and communicate directly with one of our technical experts by call or email at dingbo@dieselgeneratortech.com.