An Update on the Design of Ammonia Rotary Vane Compressors
An Update on the Design of Ammonia Rotary Vane Compressors (1986)-The key to the prolific success of the rotary vane compressor is its utter simplicity. The rotary sliding vane design has fewer moving parts than reciprocating and screw compressors. There are no valves, pushrods, crankshafts or timing gears to inspect or replace. What the vane compressor does have are vanes, bearings and mechanical seals and all of these are readily accessible and easy to replace. Major components including the cylinder, rotor, and cylinder heads will last well over twenty years when maintained properly. When a major overhaul is required, the vanes, bearings and seals can typically be replaced in one day so downtime is minimal. The rotary sliding vane compressor is the only design available which automatically compensates for wear over time. Other types of compressors lose efficiency as parts wear resulting in greater than normal clearances. Since centrifugal force holds the sliding vanes tightly against the cylinder wall, the rotary compressor does not lose efficiency due to routine vane wear. Because of its single rotor design, the sliding vane compressor operates without vibration, greatly simplifying installation requirements. These features combine to make the rotary sliding vane compressor as viable today as it was forty years ago. The inherent simplicity, reliability, ease of maintenance and low first cost have resulted in thousands of successful ammonia refrigeration installations.
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