Gear Vibration Analysis And How It Helps Your Industrial Gearbox

Gear Vibration Analysis And How It Helps Your Industrial Gearbox

Date: February 9, 2018

Gears are critical components of your industrial gearbox and are critical to running your company. It is vital that they work as intended or your entire operation could come to a halt. Gearboxes, while tough, are sensitive machines prone to failure if not properly maintained. These machines are constantly under extreme stress and high temperatures. Accordingly, even the smallest misalignment caused by vibration issues could be catastrophic.

Gear vibration analysis

Vibration analysis has grown in importance recently when it comes to industrial gearboxes. This type of maintenance is one of the most widely used gear fault analysis techniques. It aids in early fault detection, enabling users to prevent breakdowns.

Vibration analysis involves listening to the vibration in the gearbox. An industrial gearbox is composed of a variety of components, and each of them vibrates on a unique frequency. If your gearbox has suffered damage, the noise patterns will change. The sound you hear can help you diagnose the type of the damage, and even it’s source. Keeping a record of all maintenance can help you pinpoint when a problem began and what caused it.

Common vibration analysis methods

Gear failure can be caused by manufacturing errors, improper design, application errors, or a variety of other causes. While industrial gearboxes are designed to withstand heat and pressure, if there is an error in the manufacturing process, it could result in serious damage. Inferior materials, insufficient lubrication, and incorrect materials or gear geometry are all design flaws that can result in damage. Improper mounting or installation, cooling, and maintenance are application errors that may cause damage to your gearbox as well. Many technicians will use these techniques to detect flaws. If you aren’t sure how to perform these tests, contacting an expert can be beneficial.

Resonance analysis takes the natural frequencies and vibrations in the gearbox and analyzes them. Resonance tests can be conducted with a coast-down curve, impact tests, run-ups, and measurements of bending lines on the shafts.

Time domain analysis evaluates the vibration time, signal, and amplitude to ascertain if there are faults in the gear-rotor bearing system. This method alerts technicians if there are impulse signals that arise from gears or bearings.

Frequency domain analysis utilizes three different techniques: the Hilbert transform method, power cepstrum analysis, and fast Fourier transform. Each of these techniques measures the difference between the spectral density to identify any parts that may be faulty. These techniques are used to identify misalignments, unbalance, and other similar issues.

Envelope analysis evaluates the roller bearings and gear mesh for roughness or damage. Phase measurement analysis (PMT) is often paired with frequency domain analysis to identify loose parts, unbalance, and misalignments.

Order analysis is used to test rotating or reciprocating machines such as turbines, compressors, and pumps, by reviewing noise and vibration signals. Orbit analysis is used specifically to inspect shaft vibrations.

Need to know the limits of your gearboxes’ vibration?

If you need help in reviewing your rotating equipment vibration results, contact the experts at Amarillo Gear Service in Amarillo, Texas for assistance. You can call us at (806) 622-1273 or Contact Us by email to learn more about our Amarillo Gear™ and Marley™ gearbox repair services. We will be glad to tell you more about the Regions We Service and our Stock/Exchange Program, which allows you to purchase high-quality, rebuilt gearboxes.

Comments are closed.

Skip to content