What can cause a bearing to be reduced in vibration?
These defects can be extremely small and difficult to detect and yet can have a significant impact on vibration critical equipment or can result in reduced bearing life. This type of defect can take a variety of forms: indentations, scratches along and across the rolling surfaces, pits, debris and particles in the lubricant.
Where can I find low speed bearing analysis?
LOW SPEED BEARING ANALYSIS Bruce Weathersby KOSA P.O. Box 4, Mail Drop 1.6 Highway 70 W Salisbury, NC 281144 ABSTRACT: Accurately measuring and interpreting vibration data on bearing problems in low speed applications (below 200 rpm) can be difficult. A wealth of information is published on diagnosing bearing problems in higher speed applications.
How is the vibration of a bearing measured?
As a result bearing manufacturers have developed vibration tests as an effective method for measuring quality. A common approach is to mount the bearing on a quiet running spindle and measure the radial velocity at a point on the bearing’s outer ring in three frequency bands, 50-300, 300-1800 and 1800-10000Hz.
How are bearing defects affected by low speed?
Bearing defects, at low speeds, produce smaller amplitudes (in inches per second) than would be normal at higher speeds. A discussion with accompanying graphs is presented. Accelerometer performance is also very important in this area. Their performance and positive solutions to the problems they present are covered.
LOW SPEED BEARING ANALYSIS Bruce Weathersby KOSA P.O. Box 4, Mail Drop 1.6 Highway 70 W Salisbury, NC 281144 ABSTRACT: Accurately measuring and interpreting vibration data on bearing problems in low speed applications (below 200 rpm) can be difficult. A wealth of information is published on diagnosing bearing problems in higher speed applications.
Bearing defects, at low speeds, produce smaller amplitudes (in inches per second) than would be normal at higher speeds. A discussion with accompanying graphs is presented. Accelerometer performance is also very important in this area. Their performance and positive solutions to the problems they present are covered.
Why does my driveline vibration increase with acceleration?
If the vibration steadily increases with driveshaft speed (either accelerating or decelerating) the symptom is primarily the result of a driveshaft imbalance or yoke run-out. Sometimes this yoke run-out problem can be improved by rotating the U-joint 180-degrees in the rear end differential yoke.