Uneven piston force
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The compressor model is 2D45-14.7/34.5-87. What does 87 represent? What harm can occur when the piston forces on the two sides are uneven?
An exhaust pressure of 87 bar(G) can lead to excessive vibration of the unit, as well as affect the service life of the moving components. That’s all there is to know
Hmm, so what does 14.7-34.5 mean?
14.7 indicates that the suction volume at the primary inlet is 14.7 m3/min, while 34.5 represents the primary inlet pressure of 34.5 bar(G)
Mm-hmm, so does 45 represent the maximum piston force?
The piston force, gas force, and inertial force must be balanced; otherwise, it can lead to damage to the components
The meaning of the 2D45-14.7/34.5-87 model: 2-stage counter-acting type, nominal gas force of 45 tf (tons), volumetric flow rate of 14.7 m3/min, inlet pressure of 34.5 bar(G), and outlet pressure of 87 bar(G). The maximum piston force allowed for this engine (the nominal piston force) is 45 x 0.8 = 36 tf (tons). If the pressures and cylinder diameters on the two sides are different, then the piston forces on those two sides will generally also be different; this is a normal phenomenon. As long as the difference isn’t too large, there’s generally no problem. When designing compressors, manufacturers generally try to make the gas forces and piston forces on both sides as similar as possible, but sometimes it’s simply not feasible to do so. However, judging from the parameters of this engine unit, it should have two stages of cylinders, so there shouldn’t be any difference in piston force on the two sides.
I agree with you; if there is a difference in piston force between the two sides, it indicates that the piston ring clearance on the side with lower piston force is too large, resulting in air leakage as pressure moves from the high-pressure side to the low-pressure side
What does \"dual primary cylinders\" mean?
The pressure at the primary inlet is 34.5 bar (G), while the exhaust pressure at the final stage is 875 bar (G). The value 45 represents the maximum allowable gas load, which is 450 kN. A dual-primary cylinder setup means there are two primary cylinders, enabling two stages of compression in the compressor.