XYO Balancer Blog

Journal Bearings: Oil Whirl and Oil Whip

Journal bearings are a very simple form of bearings because they contain no rolling elements. The journal is the portion of the shaft that slides over the bearing surface. The advantage with journal bearings is that they are inexpensive, simple and have a high load

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Damping Ratio in Free Vibrations

Free vibrations can be defined as oscillations about a system’s equilibrium position that occur in the absence of an external excitation. In physics, perpetual motion is impossible. Dry friction, viscous friction, internal friction of the system, aerodynamic drag, etc eventually dissipate the energy (damping). For

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Vibration in Electric Motors

Electric motors are one of the most commonly used pieces of equipment in industry; they drive everything, ranging from pumps, and fans, to conveyor belts and compressors. The motors come in various shapes and sizes, but their underlying design is similar. A basic electric motor has a

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Modal Analysis

Modal analysis is the study of the dynamic response and properties of structures when they experience external excitations such as noise and vibration. It is a very useful tool for determining how a system will respond to external excitations and is commonly applied in the

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Flexible Modes

Mode shapes are divided into two categories: rigid body and flexible modes. Rigid body modes have been covered in the previous article. Rigid body modes do not involve any deformation of the rotor, only translation and rotation. On the other hand, flexible modes involve deformation

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Cavitation

Cavitation describes the process where a liquid is vaporized due to fluid flow effects to form “cavities” or vapor bubbles; these bubbles rapidly implode and generate immense forces. A sudden drop in pressure of a liquid, below its vapour pressure, causes it to vapourize. This

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