Reduce the vibrations efficiently & silent operation
AERO-DYNAMICAL DESIGN
Air-inlet with optimal aero-dynamical design reducing noisy air turbulences
HYDRO-DYNAMIC-BEARING TECHNOLOGY
We defined HDB to Hydro Dynamic Bearing. An oil seal design that has a higher reliability and advantage than conventional fan motor design. 1. High revolution precision, low vibration noise 2. Fluid seal design provide extremely long life span 3. Surface tension effect, runs more smoothly with no friction, extremely quiet Fluid seal design is achieved through the use of oil surface tension and hydrodynamic pumping forces provided by grooves. Bend area is centralized oil and prevented oil leakage out of motor (oil leakage is main problem of sleeve bearing, short life time) . Friction between shaft and HDB will be down due to herringbone structure reaction(friction between the metal is disadvantage of ball bearing, noise & waste heat problem). So HDB conquer sleeve & ball bearing disadvantage to become more reliable & quiet technology for Top-notch fan. Such design concept is successful and applicative on HDD, and we can see a reliability application in it.
HDB, Ball, & Sleeve comparison
Sleeve
Ball
Hydro-Dynamic
revolution precision
mediocre
good
best
vibration noise
mediocre
loud
quiet
life span (hrs)
30,000
50,000
>150,000
waste heat
high
high
low
Cost
low
high
high
HDB Design Principles
Oil surface tension and hydrodynamic pumping forces provided by grooves, no friction, extremely quiet
Specifications
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- by David_W @Mar 05, 2012
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Messages about Cougar Vortex 140MM Hydro Dynamic Bearing Fan 1200RPM 70.5/119.8CFM 19.2DB 3PIN Black Orange Retail
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