AN A320 IN CRUISE AT FL360 DECLARED AN EMER AND DIVERTED DUE TO VIBRATION AND SMOKE IN THE COCKPIT. CAUSED BY A FAILED AVIONICS INTAKE FAN BEARING FAILURE.

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DURING CRUISE FLT AT FL360; WE BEGAN TO FEEL AND HEAR A VIBRATION. SEEMED TO BE COMING FROM BENEATH THE COCKPIT. VIBRATION CAME AND WENT; THEN CAME BACK STEADY. CALLED THE 'A' FLT ATTENDANT TO HEAR HER OBSERVATIONS ON THE NOISE. SHORTLY THEREAFTER; BEGAN TO NOTICE THE SMELL OF SMOKE. THE FO AND I DONNED OUR OXYGEN MASKS AND ESTABLISHED COMS. I INFORMED ATC THAT WE HAD SMOKE IN THE COCKPIT AND WOULD BE DSNDING. FO BEGAN THE DSCNT AND WE REVIEWED AND ACCOMPLISHED THE QRC PROC. WE WERE ROUGHLY THE SAME DISTANCE AWAY FROM ZZZ1 AND ZZZ2; BUT ZZZ1 HAD BEAUTIFUL CLR SKIES AND ZZZ2 DID NOT; AND AS SIMPLE AS IT MAY SEEM; THAT IS EXACTLY HOW I CHOSE ZZZ1 FOR OUR DIVERSION SITE. I EVENTUALLY DID SPEAK WITH DISPATCH ON RADIO #2 AND INFORMED HIM THAT WE WERE DIVERTING TO ZZZ1 DUE TO SMOKE IN THE COCKPIT. I CALLED THE 'A' FLT ATTENDANT AND INFORMED HER THAT WE WERE DIVERTING TO ZZZ1 DUE TO SMOKE/FUMES IN THE COCKPIT AND THAT WE WOULD BE ON THE GND IN APPROX 7 MINS. I ALSO TOLD HER THAT I DID NOT THINK A PREPARE FOR EVAC WAS NECESSARY. WITH ASSISTANCE FROM ATC; GOT ESTABLISHED ON FINAL TO RWY IN ZZZ1 AND LANDED NORMALLY; ALBEIT 3000 LBS OVER MAX LNDG WT. WE EXITED THE RWY AND SPOKE WITH THE AWAITING CFR PERSONNEL ON VHF #1. WITH THEIR ASSESSMENT OF NO VISIBLE SMOKE OR FIRE; WE TAXIED TO THE RAMP IN FRONT OF THE CTL TWR; STARTED THE APU AND SHUT DOWN THE ENGS. OPENING THE COCKPIT WINDOWS; WE ESTABLISHED DIRECT VERBAL COMS WITH CFR AS WELL AS ARPT PERSONNEL. THEY WERE ABLE TO LOCATE AN AIRSTAIR TRUCK AND WE DEPLANED THE PAX INTO THE ZZZ1 ARPT TERMINAL. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR INDICATED THAT THE PROB WAS CAUSED BY AN AVIONICS INTAKE FAN BEARING FAILURE; ADDING THIS INST COOLING SYS HAS AN INTAKE FAN AND AN EXHAUST FAN BOTH OPERATING AT THE SAME TIME.