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Valve气阀
Reciprocating compressors generally use one of three types of valve configurations:
The Figure shows a drilled crankshaft.
Crankshafts should have removable balance weights to compensate the rotary unbalance
as well as reciprocating unbalances. The crankshaft should be dynamically balanced
when above 800 rpm.
Permits a longer stroke and greater capacity.
Separates crankcase from the cylinder, allowing control of oil carryover into the cylinder.
Connecting Rod连杆
Purpose of the connecting rod is to connect the crankshaft and the crosshead. The
connecting rod converts the rotary motion into reciprocating motion. The connecting
rod bolts and nuts shall be securely locked with cotter pins or wire after assembly.
Like Crankshafts, the connecting rod has drilled hole for oil passage.
The packing rings are the important element of rod packing assembly. The below-listed
packing rings are widely used in a reciprocating compressor.
Rod loading must be kept within the limits set by the compressor manufacturer because overloading can cause excess runout of the rod resulting in premature packing wear. This in turn leads to leakage, reduced efficiency, and increased maintenance expense.
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