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17-05-2006, 07:48 PM #1
Bearing trouble - rotary compressor
We have two rotary compressors that service blast freezing rooms. The bearings on both compressors both went out at the same time. There were thousands of small metal flakes in the oil separator. We have since rebuilt the compressors (new bearings), had outside services (2 companies) rebuild and have run into the same problem. We are now thinking that liquid ammonia could be in the suction line drawn into the compressor. This would put pressure on the shaft and rotary causing the alignment to change and wearing the bearings prematurely. Is this possible? Has anyone seen this before and what would be the signs to know if liquid was actually being drawn by the compressor? Also, is there any chance that liquid ammonia could make it through the oil separator and into the bearing itself to cause more problems? any help greatly appreciated
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