You know, in large rotating equipment such as steam turbines, correctly judging the forward and reverse rotation state of the rotor is crucial to ensure the safe operation of the equipment and prevent major accidents. The speed monitor JM-C-3ZF can capture and analyze the speed direction in an instant through a series of ingenious designs and advanced technical means to ensure that the steam turbine always works within a safe range. Let’s talk about this in detail below.

First of all, you have to understand that the speed monitor JM-C-3ZF is an intelligent speed monitoring and protection instrument that integrates modern electronic technology and precision sensing technology. It can not only monitor the speed, but also identify the forward and reverse rotation state of the rotor, especially in the start-up and shutdown stages of the steam turbine. This ability is particularly critical.

To understand how the speed monitor JM-C-3ZF identifies forward and reverse rotation, we must first talk about its working principle. This instrument uses a non-contact measurement method, usually relying on a proximity sensor or a magnetic resistance sensor. The sensor will be installed at a fixed position on the steam turbine, aligned with the mark point or gear on the rotor. Whenever the rotor rotates, the marking point or the tooth surface of the gear will periodically approach and move away from the sensor, generating a changing magnetic field, thereby generating an induced current or voltage change in the sensor.

The signal output by the sensor is then sent to the signal processing unit of the instrument. The task of this unit is to convert the original signal into a form that the computer can understand, and at the same time, a series of signal processing, such as filtering, amplification, shaping, etc., is required to ensure the purity and stability of the signal.

For the judgment of forward and reverse rotation, the speed monitor JM-C-3ZF will pay attention to the rising and falling edges of the signal, as well as the phase relationship of the signal. In the forward state, when each tooth of the marking point or gear passes through the sensor, the signal changes regularly, such as the rising edge first and then the falling edge; while in the reverse state, this order is reversed. By accurately analyzing this characteristic of the signal, the instrument can determine the actual rotation direction of the rotor.

In order to further improve the reliability of the system, the speed monitor JM-C-3ZF usually adopts a redundant design, that is, multiple sensors and independent signal processing paths are configured. The purpose of this is that when any sensor or processing unit fails, the system can still work normally through other paths to ensure accurate judgment of the forward and reverse state, thereby improving the safety and stability of the entire monitoring system.

In addition to basic forward and reverse identification, the speed monitor JM-C-3ZF can also monitor the speed change trend in real time. Once an abnormal situation is found, such as a sudden drop or rise in the speed to the set warning value, the instrument will immediately trigger an alarm to remind the operator to pay attention and take necessary countermeasures. This real-time monitoring and early warning function is extremely important for preventing potential equipment damage and production interruptions.

In this way, through its advanced sensor technology, precise signal processing capabilities and intelligent algorithm design, the tachometer JM-C-3ZF has become an expert in turbine forward and reverse state identification. It not only improves the safety and reliability of turbine operation, but also provides valuable real-time data for maintenance personnel to help them better manage and maintain equipment.

Yoyik can offer many spare parts for power plants as below:
PRESSURE SENSOR R412010767
speed sensor CS-075-3900/13
CIRCUIT BREAKER KFM2-100H/32282
Transmitter GJCD-16
Speed probe CS-1-D-065-05-01
Pulse Power card MBD 206
AUXILIARY RELAY JZS-7/2403 (XJZS-2403)
displacement measurement instrument DET100A
linear measurement transducers HL-3-300-15
MONITOR, VIBRATION HY-3SF
LIMIT SWITCH 802T-AP
Pressure Switch 0821097
Air Trap for Compressor KS41H-16C
Level Gauge AL501-D51002
PS Board CS057210P
RTD sensor WRNR3-18 400*6000-3K-NiCr-Ni
Frequency Meter ESS960F
Leica Digital Microscope Camera with SW DFC450 C
magnetic pickup rpm sensor ZS-02
RTD-Resistance Temp. Detector WZPM-001-A3E90-5000