Simple but effective protections that detect vibrations and trigger an alarm, or give a signal to shut down the machine, if the machine vibration exceeds a preset threshold level. The protection sensor allows for early detection of changes in the characteristic vibrations of the machine, which can be caused by, for example, imbalance, loose connections, overheating of bearings, lack of lubricant, or cracks in the bearings. PCB Piezotronics, through its acquisition of IMI Sensors, offers a comprehensive selection of electronic and mechanical sensors for vibration protection that will suit many applications and installations. Electronic circuit breakers have an output signal of 4-20mA and can be combined with electronics for signal transmission. They are also available in ATEX version. Mechanical sensors are simple spring sensors, without the need for power supply. Smart circuit breakers are also available, programmable via USB port.
Electronic circuit breakers are de-facto piezoelectric vibration sensors, supplemented by electronics and SSR switches. They offer an output in two values - voltage levels, each of which can be connected to another output in the form of an alarm or notification on the user's side. They are compatible with the electronics for signal transmission described in their own category. Mechanical sensors, using simple spring mechanisms, represent basic, simple protection at minimal cost. They are suitable for less critical production links and cheaper equipment. Their advantage, in addition to the favorable price, is that they do not require power. As soon as the vibration exceeds the set range of the spring, the circuit is closed by a magnetic switch. Smart circuit breakers, programmable via USB, are relatively inexpensive, piezoelectric sensors, intended, among other things, as a replacement for mechanical circuit breakers, thanks to their connection with only two wires. They combine the advantages of mechanical circuit breakers described above with the small size and electronic output of electronic circuit breakers.
A safety element that can save a lot of time and money, thanks to the early detection of a defect inside the machine, manifested by a change in the character of its vibrations. It will allow monitoring of defects, or for unexpected shocks caused, for example, by the impact of a foreign body on the machine. For basic use, mechanical circuit breakers are sufficient, for monitoring expensive and important machines, we recommend using electronic ones. The selection of a suitable protection should be preceded by a (modal) analysis of the machine's behavior during normal operation, based on which the appropriate type and range of its sensor is selected. We can help you with this, as well as with the connection of the circuit breaker itself with the safety circuits on the machine side and the PLC system of the line. Detecting a problem on the machine before a catastrophic failure occurs can save not only production and repair resources, but also the lives and health of people working and moving near the protected machine.
Ondřej
Heřmanský
Sales Manager
Ing. Tereza
Caha
Sales Manager
Ing. Lukáš
Kovárník
Technical support for vibrations
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