![]() “We finally found a combination of rotor and stator that would keep oil in, but also ward off contamination up to and including a fire hose. “It took about six months to design something that would work in severe hose-down conditions,” said Orlowski. As he experimented with labyrinth seals, Orlowski started with the challenging application of pumps in the corn processing industry, which were cleaned daily – with a fire hose. ![]() Orlowski then turned his attention to solving this issue on process pumps, where rubber lip seals were standard. Orlowski and his team retrofitted the API refinery pumps with standard API labyrinth seals, made with a rotor and a stator. It went through there and into the bearing housing, causing bearing failure and a catastrophic wreck.” One of the single spring mechanical seals started to spray water and of course the water was coming out of the seal and going right through and under the lip seal, which was worn. ![]() The building structure began to suffer and several windows had fallen from the 110-story building onto the street below.Īccording to Orlowski, “They were refinery pumps with rubber lip seals, which is a rarity. One of the chilled water pumps had failed, though, resulting in a cooling system failure. Orlowski was working in the pump distribution and repair business when he was called out to repair and retrofit 16 HVAC pumps at Chicago’s Sears Tower.Įven though it was February in Chicago, the south side of the building was supposed to be cooled because of the intense daytime sun load. Falling Windows: The Origin of the Bearing Isolator ![]()
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