Abstract
Hydraulic drive of construction machines and mechanisms used in technological construction processes is increasingly being used in the construction industry. This is due to the small weight and small overall dimensions per unit of drive power, insignificant inertia of moving parts, good dynamic characteristics, ease of reversing, smooth running, durability of mechanisms due to self-lubricity, simplicity and reliability of operation. The reliability of the hydraulic drive of construction machines is largely determined by the effectiveness of the lubrication system of contactless seals of movable joints. The stability of characteristics, efficiency and safety of operation of mechanisms and hydraulic drive, in particular, depends on the quality of lubrication of sliding surfaces. In order to improve the quality and durability of the hydraulic drive for a certain range of plunger diameters and pressure drops in hydraulic units, the most rational means of combating dry friction forces is a slit non-contact seal.
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