Thursday, February 6, 2014

NVH reduction in a Diesel powered power generator

A very unique project.  A customer bought a crude diesel generator to us and asked us to reduce the NVh levels and make it more mobile. We proposed 4 designs and the customer selected the one in the photographs. The alternator and engine were joined together using 2 clam like housings. One half of the housing was fixed on the engine while the other was on the alternator. The 2 halves were joined together with 15 M12, nickel plated Allen bolts. The 2 bearing design of the alternator was converted into a single bearing one by cutting the excess shaft from the rotor by lathe machining. Once both housings were joined the engine and alternator were a single unit. The housings were sand cast cast iron with wooden patterns. Power was transmitted from engine to alternator through a Fenner Lovejoy coupling. The whole engine+alternator combo was mounted on a pallet truck with rubber anti-vibration mounts in between. Pallet truck ensured more mobility, cast iron housings, vibro isolators ensured significant reduction of NVH levels.



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