FIELD: hydraulic engineering; pumps or hydraulic motors for hydraulic systems of different application. SUBSTANCE: planetary rotary hydraulic machine has non-round sun gears with internal and external teeth, planet pinions and end face covers with channels to let working liquid in and out. Centrode of sun gear with external teeth has n projections, and centrode of sun gear with internal teeth has k spaces related by equation n+3 ≥ K ≥ n+1. Planet pinions are in meshing with sun gears, and their number does not exceed n+k. EFFECT: increased power output and capacity of machine. 2 dwg
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