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expansion valve to overfeed compressor to knock water regulating valve to fail crankcase drains to plug
a shortage of refrigerant in the system air in the system an accumulation of liquid refrigerant in the crankcase a shortage of oil in the crankcase
cylinder casing cylinder bore crankcase door aperture in the cylinder block
inspection covers should not be opened until the engine has cooled ventilation system should be continued in operation for one hour for cooling scavenge pump should be immediately secured to prevent loss of lube oil explosion covers should be opened slightly to provide extra ventilation
the crankcase explosion lifting of the cylinder safety valve a scavenge fire opening of the manhole
To satisfy To be satisfied After satisfying After being satisfied
prevents spark generation removes combustible gases determines the level of combustible gases provides inert gas generation in crankcase
has nm continuously for a long period suction pressure is below normal oil level is below normal starts after a long idle period
Open the crankcase immediately to check for damage Apply fire fighting water through the crankcase breather Allow the engine to cool before opening the crankcase Assume that there is no damage to the crankshaft
removes combustible gases in the crankcase prevents the formation of combustible gases in the crankcase cools lubricating oil improves cold weather starting
the cylinder cover the bottom of bed-plate the sump the crankcase door
the splashing of lubrication oil by the crankshaft the dilution of crankcase oil with particles of combustion broken fuel lines spraying oil on the crankcase the ignition of unburned fuel and air in the crankcase
a crankcase explosion a scavenge fire abnormal compression ratio incorrect air / fuel ratio
frame piston crankcase explosion plate
Lube oil is diluted and its viscosity is reduced Sulfuric acid is formed Bearings become pitted ad immediately fail Valve stems develop sludge deposits
the vapor air mixture is too rich to burn an explosion may occur if a source of ignition is present the vapor air mixture is too lean to bum the upper explosive limit has been exceeded
（1） only （2） only both （1） and （2） neither （1） or （2）
free entry of air to the crankcase water entering the crankcase while engine wash-downs are being performed excessive oil leakage during periods of increased blow-by sub-cooling internal components
an immediate crankcase explosion oil contamination in the compressed air a decrease in compressor capacity no immediate loss of the compressed air capacity
The cylinder indicator cocks should be opened The sump lube oil scavenge pump should be secured immediately The explosion relief valves should be manually opened The crankcase should remain unopened until the engine has cooled
湘公网安备 43130202000226号