PNEUMOJET VACUUM PUMP Russian patent published in 2001 - IPC

FIELD: jet facilities. SUBSTANCE: active nozzle flow passage is formed by two cones, first being made with cone angle equal to 8^° ± 1^° with ratio of maximum diameter Д to small diameter Д₁ along compressed gas flow equal to 1,5 ± 0,5 . Second cone is made with cone angle equal to 4^° ± 1^° at ratio of maximum diameter Д₁ to small diameter d along compressed gas flow equal to 2 ± 0,5 . Cone of diffuser is made, relative to cones of active nozzle with convergent parts towards each other with cone angle equal to 8^° ± 1,5^°, at ratio of maximum diameter Д₂ to small diameter d₁ equal to 3 ± 1. Point "c", projection of vertex of second cone of active nozzle is located in diffuser cone. EFFECT: increased efficiency. 1 dwg