Sensor Captures Gear Mesh And Bearing Faults

PCB Piezotronics has launched a high-frequency industrial accelerometer for measurements on high-speed compressors, gearboxes and turbomachinery, enabling the early detection of impending problems. The 621B40 operates to 30kHz for gear mesh and bearing fault analysis. The accelerometer works with online or portable monitoring systems to provide effective vibration monitoring. It operates to 30kHz even with a magnetic mount and captures high-frequency gear mesh faults that are often missed during routine route-based measurements, according to the company.

When analysing the condition of an integral gear compressor, for example, a technician needs to be able to examine gear mesh frequency and its sidebands. The harmonics of the gear mesh and natural frequency of the gears play a significant role in diagnosing potential machinery faults. With a magnetically mounted 621B40 supplying a response to more than 30kHz, a vibration analyst can obtain precise measurements of these high-frequency phenomena. For even higher-frequency measurements, PCB Piezotronics can supply its 352A60 sensor, which features an upper frequency range of 60kHz at +/-3dB and is designed to work with a stud-mount adhesive base (supplied).

Principal performance specifications of the 621B40 sensor include sensitivity of 10mV/g, a measurement range of +/-500g and a frequency range from 1.6Hz to 30kHz (+/-3dB). Shock resistant to 10,000g peak, the 621B40 operates over the -54C to +121C temperature range.

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