ST-3, HD-ST-2, SDJ-SG-2
HD-ST series magnetoelectric speed sensors can measure various displacements, speeds, etc. after being connected with vibration and intensity meters. The rotor supported by the rolling bearing, the vibration will be transmitted to the bearing seat sufficiently large, mounted on the bearing seat or very close to the bearing housing on the speed sensor, the internal motion coil cuts the magnetic field and outputs the voltage, provides the signal to the monitoring instrument, Used to predict and alarm mechanical failures.
Electrical indicators:
Sensitivity: 20mV/mm/S±5%
Frequency response: 10 ~ 1000Hz ± 5%
Natural frequency: about 12Hz
Amplitude limit: 2mm (peak-to-peak)
Acceleration: 10g
555555555.jpg Installation method: vertical or horizontal
Environmental indicators:
Temperature range: -30°C～120°C
Relative Humidity: Up to 95% non-condensing and no strong electromagnetic field interference around
Physical indicators:
Dimensions:φ35×72mm
Installation method: double head screw fixation
Widely used in electric power, petroleum, chemical, steel, metallurgy and other industries, the absolute vibration monitoring of large-scale rotary machinery equipment, measuring frequency response range of 4.5HZ ~ 1000HZ (-3dB), the standard sensitivity of 20mv/mm/s, vertical / horizontal installation With strong anti-interference performance, it can work stably and reliably in harsh environments for a long time.
The vibration speed sensor can be used to measure the absolute vibration of a bearing housing, housing or structure with respect to free space. Its output voltage is proportional to the vibration speed, so it is also called a speed-type vibration sensor. The output can be the magnitude of the speed value, or it can be converted into the displacement signal output after the integral of the speed. This measurement can be used to evaluate the overall operating conditions of rotating or reciprocating mechanisms.
Most of the most common mechanical vibration problems stem from the rotor. Such as imbalance, misalignment, friction, etc. However, for some machines, the vibration of the shaft is almost completely transmitted to the bearing shell. In this case, the vibration of the bearing shell (measured using a speed sensor mounted on the housing) can be measured and provided for the comprehensive work of the machine. Meaningful information. These machines include: machines with rolling bearings and machines with oil film sliding bearings.
For most machines, for vibration measurements, it is best to use an eddy current sensor that can directly detect the actual vibration of the shaft in a non-contact manner. However, due to various reasons (installation restrictions and environmental factors, etc.), it is inconvenient to install eddy current sensors. For such machines, if the vibration of the shaft is transmitted to the bearing shell, the mechanical vibration can be adopted. A speed sensor mounted on the bearing performs the measurement.
The overall design of the sensor ensures that it has the following characteristics of use:
(1) Its output signal is proportional to the speed of vibration, so it can give consideration to high frequency, intermediate frequency and low frequency applications for vibration measurement. And meet the current international standard (ISO) requirements for the assessment parameters of rotating machinery.
(2) Compared with other types of vibration sensors, sensors have lower output impedance and better signal-to-noise ratio. It can work with general AC voltmeters or oscilloscopes, and has no special requirements for output plugs and cables. It is easy to use.
(3) The sensor has a low frequency of use and can be applied to a low-speed rotating machine.
(4) The sensor design eliminates frictional moving elements and is therefore flexible enough to measure small vibrations. (0.01μm)
The sensor has a certain resistance to lateral vibration. (Not more than 10g peak-to-peak value)
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Wire Materials: Iron Wire or carbon steel wire.
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Packing: Spools, coils.
Wire Diameters: Similar to galvanized iron wire, from 5mm to 0.15mm (wire gauge 6# to 38#).
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