FRICK 螺杆压缩机课件.ppt

Frick has Produced over 60,000 Screw Compressors since the First RWB-II was introduced in 1982 Construction Male and Female Rotors Mounted on Radial and Axial Bearings Fitted in close tolerance intersecting bores. Suction process Maximum Suction Volume Trapped Compression Continuation of Compression Beginning of Discharge End of Discharge Axial Discharge Port Volume Ratio All Frick screws built since 1981 incorporate VolumizerTM Variable Volume Ratio control, to minimize power consumption due to over and under compression. This is effective at full and part load. Volume Ratio Low Vi Volume Ratio Hi Vi Frick VolumizerTM variable volume ratio controlsaves power automatically as conditions change Capacity Control All Frick screws offer precise and efficient capacity control by use of a slide valve and slide stop controlling in concert together. Slide Valve Unloading How Slide Valves ImprovePart Load Volume Ratio Capacity Control Methods-2 Cylindrical Roller Bearing Anti-Friction Bearings Consume Less Frictional HorsepowerApproximately 11 HP on a 300 HP application Anti-friction Bearings allow tighter rotor to rotor clearance for less gas leakage and reduced power consumption. Failure Mode of Anti-Friction Bearings Bearing Flaw Failure Detection Early failure detection of anti-friction bearings is easy enough that there is no reason to perform teardown inspection if analysis is done correctly. Not many people understand how to interpret vibration data accurately. Frick provides training, guidelines and in-house support and specialized monitoring equipment. Frick Lab Facilities Frick Screw test gas loops 2000 HP N2 loop 800 HP variable speed N2 loop 600 HP variable speed NH3 loop 600 HP R-134a loop 150 HP R-22 loop 150 HP R-134a loop 600 HP NH3 stand for noise tests. Misc. small test rigs. Single vs. Twin Screw Twin screws are more efficient and more durable than singles. Stiffer rotors don’t deflect under load. Not as sensitive to loss of lubrication as