Abstract
Currently, one of the main ways to improve the efficiency of piston compressors and volumetric pumps is to combine them into a single unit, called a piston hybrid energy machine. Recently, a new class of crossheadless piston hybrid energy positive displacement machines has appeared. In this work, a comparison of mass-dimensional indicators of experimental crosshead and crossheadless hybrid energy machines is performed. The analysis of the results shows that the crossheadless machine has significantly smaller masses of moving parts performing reciprocating motion (almost 3 times) and a smaller maximal overall size (almost 1.5 times) in comparison to the crosshead machine. The specific mass-dimensional indicators of the two machines are comparable.
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