Dry Ice Blasting with Cold Jet
[Web Information Archive - circa 2004]

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NEW APPLICATIONS

THE HOOVER DAM

Application Characteristics:
There are 18 hydroelectric generators at the Hoover Dam. These generators tend to build up with grease, dirt, and oil with use. The dirtier the generators get, the harder they work to run, which makes the generators get warmer. According to a representative of the Bureau of Reclamation, the generators are more efficient the cooler they are so the goal is to keep the generators free from grease, dirt, and oil as much as possible.

The exciter is itself a small generator that makes electricity, which is sent to the rotor, charging it with a magnetic field. (approximately 8 ft)

The rotor is a series of electromagnets, also called poles. The rotor is connected to the shaft, so that the rotor rotates when the shaft rotates.

The stator is a coil of copper wire. It is stationary. (sits on top of rotor and is approximately 8 feet round)

Current Cleaning Method:
Before dry ice blasting, they were hand cleaning the generators with long brushes reaching into the holes and in some cases using solvents. Some generators were and are being cleaned in place while some are taken apart and given a more thorough cleaning.

Dry Ice blast cleaning versus current cleaning method:
Dry ice blasting decreases the time it takes to clean the generators (exciter, rotor, and stator). Dry ice blasting has created a level of cleaning not obtained before.

Recommended Blast Machine:
AeRO 30 with a variety of nozzles at 60 - 80 PSI

 

 

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