LVDT position sensors can play an important role in the predictive maintenance of gas turbines as part of process control systems used to monitor shell expansion and bearing vibration. One such LVDT is the Macrosensors HLR 750, available from Bestech Australia .
Installed on turbine shells, these hermetically sealed AC-LVDT position sensors measure shell expansion, providing linear output that operators can utilise to determine proper thermal growth of a turbine shell during startup, operation and shutdown.This series of LVDT position sensors are also used to monitor bearing vibration to detect bearing clearance limits that are indicative of bearing wear. If bearings start to wear, operators will want to be able to schedule turbine maintenance service rather than have a turbine stripped off and shut down due to excessive vibration.
Features and benefits of the position sensors include:
- The HLR 750 series of LVDT position sensors offer reliable, contactless position measurement and temperature ranges of -55 to 150°C, which are critical in power plant applications
- Available in measurement ranges from ±1 inch to ±10 inches, these stainless steel position sensors feature high resolution, excellent repeatability and non-linearity of less than 0.25% FSO
- Another feature of this rugged LVDT position sensor is a through-bore design that makes the sensor’s core accessible from both ends for better mechanical support and core guidance, as well as facilitating bore cleaning
- The lead wires on the position sensors exit through a radially mounted half inch NPT male rigid conduit fitting for easy attachment into an explosion-proof junction box
- Support electronics are also available for this LVDT position sensor, and it works well with both conventional differential input LVDT signal conditioners or ratiometric signal conditioning circuits