SUPERHIGH-PRESSURE PLUNGER PUMP Russian patent published in 2000 - IPC

FIELD: hydraulic cutting systems. SUBSTANCE: pump has housing, head accommodating insert, plunger forming working chamber in stepped inner space of insert, suction and delivery valves. Diameter of smaller step of inner space of insert is chosen from expression d₁≥/d+0,8/mm, where d₁ is diameter of smaller step, d is plunger diameter. Larger step length is chosen from expression L г (l - 5) mm, where L is larger step length; l is length of packing bushing. Working fluid pressure at pump outlet is as high as up to 600 MPa at flowrate higher than 25 l/min. (with plunger displacement frequency of -5 Hz). EFFECT: reduced power requirement, improved efficiency and service life of fast-wearing parts. 3 cl, 2 dwg, 1 ex