GEAR-TYPE HYDRAULIC MACHINE Russian patent published in 2005 - IPC

FIELD: transport engineering; positive displacement hydraulic machines.

SUBSTANCE: invention can be used in hydraulic systems of tractors of general and industrial application, excavators, agricultural, road-building and other machines. Proposed gear-type hydraulic machine contains drive and driven external gears whose journals are fitted in bearing bushings and all are arranged in inner chamber of hydraulic machine housing closed by cover. It has 3-shaped seal arranged between rear end faces of bearing bushings and cover and oil-feed channel from outlet channel of hydraulic machine to friction surface of corresponding bearing bushing. Opening of oil-feed channel to friction surface is made in zone of maximum convergence of said surface with journal of corresponding gear. Such location of soil-feed channel in zone of minimum clearance between journal and friction surface reduces requirements to minimum liquid leakage from outlet channel of hydraulic machine for lubrication of bearings.

EFFECT: increased feed factor.

6 dwg