COMPARISON OF ORBITS MEASURED USING ACCELEROMETERS AND PROXIMITY PROBES AT HIGH ROTATIONAL SPEED

• Main Author: JAYA PUTRA (NIM : 13107073); Pembimbing Utama : Dr. Ir. Zainal Abidin, MARCHELLE
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/16353
• Institution: Institut Teknologi Bandung

Rotating machines used in industry with a high rotational speed are generally supported by journal bearings. These machines are usually operated above the first and second critical speeds, but the dynamic behavior of rotating machinery has not been fully understood. To understand their behaviors, Dynamics Laboratory PAU-ITB has created a <br /> <br /> <br /> test device capable to operate above the first and second critical speeds. However, the measurement which has been carried out so far just under the first critical speed. In <br /> <br /> <br /> addition, research on the movement of the house bearing measured using proximity probes (displacement sensors) and accelerometers (acceleration sensor) has not been done. <br /> <br /> <br /> In this work, a research will be conducted on the movement of the house bearings at various speeds. This measurement is done under, around, and above the critical speeds. The measurement of pedestal shaft movement will be carried out using two different types of sensors, the proximity probe and the accelerometer. The measurements will be done in <br /> <br /> <br /> two configurations. The first is the measurement of the pedestal movement of a single-rotor shaft and the second is for two-rotor shafts connected using a flexible coupling. Once the measurements using both types of sensors are done, the obtained data will be compared one with the other. <br /> <br /> <br /> Based on the test results, the shaft-rotor orbit measured at various rotational speed produces different magnitude, shape, and direction to that obtained using other type of <br /> <br /> <br /> sensors. There are some rotational speed where the orbits above or below the rotational speeds are experiencing changes in direction. Orbits obtained from the accelerometer have different shapes and orientations, with those obtained from proximity probe.