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Intro Predictive Maintenance 2 Part 8

Tham khảo tài liệu 'intro predictive maintenance 2 part 8', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Process Parameters 237 Table 10-10c Common Failure Modes of Reciprocating Compressors THE PROBLEM THE CAUSES Air Discharge Temperature Above Normal Carbonaceous Deposits Abnormal Compressor Fails to Start Compressor Fails to Unioad Compressor Noisy or Knocks Compressor Parts Overheat Crankcase Oil Pressure Low Crankcase Water Accumulation Delivery Less Than Rated Capacity Discharge Pressure Below Normal Excessive Compressor Vibration Intercooler Pressure Above Normal Intercooler Pressure Below Normal Intercooler Safety Valve Pops Motor Over-Heating Oil Pumping Excessive Single-Acting Compressor Operating Cycle Abnormality Long Outlet Water Temperature Above Normal Piston Ring Piston Cylinder Wear Excessive Piston Rod or Packing Wear Excessive Receiver Pressure Above Normal Receiver Safety Valve Pops Starts Too Often Valve Wear and Breakage Normal Location Too Humid and Damp Low Oil Pressure Relay Open Lubrication Inadequate Motor Overload Relay Tripped Motor Rotor Loose on Shaft Motor Too Small New Valve on Worn Seat Off Time Insufficient Oil Feed Excessive Oil Filter or Strainer Clogged Oil Level Too High Oil Level Too Low Oil Relief Valve Defective Oil Viscosity Incorrect Oil Wrong Type Packing Rings Worn Stuck Broken Piping Improperly Supported Piston or Piston Nut Loose Piston or Ring Drain Hole Clogged Piston Ring Gaps Not Staggered Piston Rings Worn Broken or Stuck H L H L H H Piston-to-Head Clearance Too Small compressors because they rely on the lubrication system to provide a uniform oil film between closely fitting parts e.g. piston rings and the cylinder wall . Partial or complete failure of the lube system results in catastrophic failure of the compressor. Pulsation Reciprocating compressors generate pulses of compressed air or gas that are discharged into the piping that transports the air or gas to its point s of use. This pulsation often generates resonance in the piping system and pulse impact i.e. standing waves can severely damage other machinery