Page 124 - Subyek Teknik Mesin - Forsthoffers Best Practice Handbook for Rotating Machinery by William E Forsthoffer

Be st Practice 3 .1 Compressor Best Practices

Fig 3.1.5 Rotary liquid ring (Courtesy of Nash
Engineering Company)

suction valves, and discharge valves. Figure 3.1.6 is an illustra- The compression cycle of a reciprocating compressor con-
tion of a three-stage reciprocating compressor. Note that the sists of two strokes of the piston: the suction stroke and the
third stage piston and cylinder are mounted on top of the second compression stroke. The suction stroke begins when the piston
stage piston and cylinder. A prime mover (not shown) rotates moves away from the inlet port of the cylinder. The gas in the
the crankshaft. The crankshaft converts the rotary motion of the space between the piston and the inlet port expands rapidly
prime mover into reciprocating motion of the pistons. until the pressure decreases below that on the opposite side of

Fig 3.1.6 Reciprocating compressor

98