The fault diagnosis technology of hydraulic jack mainly includes vibration diagnosis technology, ferrography diagnosis technology, temperature diagnosis technology, acoustic diagnosis technology, oil film resistance diagnosis technology and optical fiber monitoring diagnosis technology. Among them, vibration, iron laying and temperature diagnosis technology are widely used.
1. Vibration diagnosis technology vibration diagnosis technology is widely used: online monitoring can be realized; diagnosis is fast and diagnosis theory is mature.
Application scope: especially suitable for fault monitoring of Jack in rotating machinery.
2. Ferrography diagnosis technology machine does not need to be disassembled: low investment, good effect: early fatigue failure of Jack can be found; it can be used as wear mechanism research. Application scope: it is applicable to fault diagnosis of Jack lubricated with lubricating oil, which is difficult for Jack lubricated with grease.
3.The oil film resistance diagnosis technology can use the same evaluation standard for various working conditions. The diagnosis effect of surface peeling, indentation, crack and other abnormalities is poor. Application scope: suitable for the occasion where the rotating shaft is exposed.
4.Optical fiber monitoring and diagnosis technology optical fiber displacement sensor has high sensitivity: it directly extracts signals from the surface of the jack, improving the signal-to-noise ratio; it can directly reflect the manufacturing quality, surface wear degree, load, lubrication and clearance of the rolling Jack. Application: applicable to machines that can use the sensor in the jack seat.
5. The diagnosis of temperature diagnosis technology is simple: the judgment effect of Jack burn is good. Application scope: it is suitable for simple routine diagnosis of jacks in machines.
6. Acoustic emission diagnosis technology is fast and simple: it can be monitored online. Application scope: the new technology developed in recent years is rarely used in the monitoring of Jack working condition.
