Rational Range of Pneumatic Motors
Abstract
Pneumatic motors are used only in the mining industry and, despite this relatively narrow area, in their production there is an economically unfavorable multiplicity of models with the same operating parameters, but different sizes of the active part (rotors, pistons). For example, G. I. Petrovsky plant (Donetsk SNH) serially produces gear pneumatic motors type BSH2-1-5 and PSH-7A with the same operating characteristics (pressure 3.5 kg/cm², power 7 hp, compressed air flow rate 6.8–7 m³/min), but different sizes of rotors: the first has a rotor width of 150 mm and center-to-center distance of 100 and 75 mm, the second respectively 120 and 145.3 mm. Darasun plant (Chita SNH) and the Communist Plant (Krivoy Rog) serially produce piston engines DR-10 and MP-5, also identical in operating characteristics (5 kg/cm²; 10 hp; 10 m³/min). But the diameter and stroke of the pistons in the DR-10 engine are 101×62 mm, and MP-5 100×80 mm. These are not isolated examples.
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