Hydrostatic bearings are used in large plant and machinery such as stone mills, telescopic installations etc. These bearing systems are continuously supplied with liquid lubricant via an external pressure supply. The lubricant is pressed between the bearing surfaces, which are therefore continuously separated from one another by a thin lubricant film. The bearing surfaces are not exposed to any friction and hence operate wear-free. This enables sub-micrometre position control.
Any disturbances in the hydraulics (e.g. pressure drops) can have disastrous consequences, which could result in damage to the bearings and ultimately system failure, causing high breakdown and repair costs.
The oil gap in hydrostatic bearings must therefore always be inspected reliably, which is possible by using the eddyNCDT 3001 eddy current sensor. As the sensor is resistant to oil and water splash, as well as high temperatures, in combination with its compact design, these sensors are ideal for harsh industrial environments.
The sensor is mounted horizontally to the bearing shoe and so is not directly exposed to oil pressure in the bearing. It measures through the oil film onto the opposing bearing surface. The sensor is easy to install and so is also suitable for ageing plants that need to be retrofitted.