PLUNGER HYDRAULIC CYLINDER Russian patent published in 2016 - IPC F15B15/14 F15B15/20 

FIELD: energy.

SUBSTANCE: hydraulic cylinder is intended for use in power engineering, metallurgy, construction and mining industries. Hydraulic cylinder comprises piston, cylinder, where on working cylindrical surface of piston, made from structural steel, there are circular rollers with width 6-12 mm made from high-hardness wear-resistant friction martensite, spaced apart through a distance larger than width of rollers by 1.2-1.5 times, having in cross section, in middle part, support cylindrical surfaces and inclined sides, arranged on both sides of support surfaces. Exit of piston from cylinder is performed through a cover, in which there is a drain hole and a cup-type seal, on other side hydraulic cylinder adjoins a body, having two inlet branch pipes with diameter equal to half diameter of hydraulic cylinder, hydraulic cylinder working surface is tempered with HFC.

EFFECT: technical result is longer service life of piston of hydraulic cylinder, enabling operation thereof at speeds higher than 2÷3 m/s, reduced friction losses.

1 cl, 3 dwg