- cd 21 c vibration velocity
CD-21-C vibration velocity sensor mounted vertically CD-21-2C
Measuring Range: .
Sensor Type: Photoelectric
CD-21 Series monitor with the speed sensor for measuring vibration of the bearing housing, casing or structure. The sensor can be measured with respect to the absolute vibration free space. The output voltage is proportional to the speed, the speed of vibration can also dimension after integration into the displacement of an amount which shall then be displayed. This measurement can be some form of comprehensive health of rotating or reciprocating machinery was evaluated.
The most common vibration engineering problems, most of them occur in the rotor, if unbalance, misalignment, friction, and so on. For some machinery, shaft vibration is most (or all) to the bearing housing, in this case, bearing vibration measurement for integrated operating condition of machinery and equipment, can provide more meaningful information, which includes machinery : a rolling bearing most of the machinery. Having a sliding bearing oil film machinery. In some special conditions, for some reason (such as installation conditions and environmental factors), eddy current sensors can not be installed for this type of machine vibration if the shaft bearing seat can be reached most time, this mechanical vibration of the speed sensor can be adopted to measure the bearing seat.
Second, the basic principle
The basic principles of CD-21 series speed sensor is based on an inertial mass (coil assembly) and a housing fixed magnet, the inertial mass of an elastic suspension of the original work on the housing, the sensor housing is fixed to the vibrating body on, so that when the vibrator vibrates in the frequency range of the sensor, coil and magnet relative motion, cutting magnetic field lines, circle the induced voltage which is proportional to the vibration velocity value, and the secondary instrument for mating (vibration intensity monitor, HZ-8500 Bearing vibration monitor, etc.) to display vibration velocity or displacement size of the amount to be transported to other secondary instrument or AC voltmeter to measure.