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FDB bearing technology analysis: oil seal is not durable double roll too noisy
2017-05-15
For
the pursuit of the ultimate silent users, the double ball fan because
of its unique bearing sound difficult to use for a long time was
abandoned, and oil seal bearing fan because of shorter service life and
criticism, in this environment FDB (dynamic Hydraulic
bearings) bearing appears, in fact, this is a kind of oil lubricated
bearings, the use of oil film in exchange for better noise performance
and seismic performance. The author got ChipHell senior players monster wrote an article on the
FDB bearing the essay, hoping to help everyone understand the FDB
bearings.
Dynamic
liquid bearings are usually used in the precision machinery industry,
it uses a mucosal oil bearing, oil film instead of ball. This can avoid the direct friction of the metal surface, the noise and
temperature is reduced to the lowest; while the oil film can
effectively absorb the vibration, so that the seismic capacity is
improved; more to reduce wear and improve life.
Test data 1: 8025 fan under the same conditions to run the corresponding time the temperature performance.
Test data two: 6.7MB in the background noise background, the fan
placed 1.0 meters away from the microphone, several fans of the noise of
three kinds of bearings contrast.
Test data three: with the specifications of double ball bearings and
FDB bearing fan at different heights after the noise performance
comparison.
Test data three: with the specifications of double ball bearings and
FDB bearing fan in the long-term operation after the noise performance
comparison.
FDB bearing fan structure
FDB bearing DC fan works
Because
the shaft shaft sleeve is filled with the right amount of liquid oil,
and the core processing time has a fine slot, the rotation starts, the
pressure of the oil to push the tip of the intersection (see below),
resulting in greater pressure so that the axis In the rotation is always separated from the sleeve, the friction reduced after the bearing life increased.
