ROTARY HYDRAULIC UNIT Russian patent published in 2019 - IPC F04C2/14 F01C1/14 

FIELD: machine building.

SUBSTANCE: invention relates to positive displacement hydraulic machines. Rotary hydraulic machine of planetary type consists of two series-connected sections I and II. Each section contains movable undulating central wheel 1 with external teeth, fixed wavy central wheel 2 with internal teeth, with the same number of waves as moving one. Working cavities are enclosed between wheels 1, 2, floating satellites 3 and flat end covers 4, 6 and central end wall 5. Working medium discharge channels of the previous section are connected to channels of the next section supply. Wheels 1 of both sections are fixed on common central shaft 10 without relative rotation, and wheels 2 are turned relative to each other. Feed and discharge channels are made in wheel cylindrical gear surface 2. Wheels are composed by disks 11, 12 tightened by covers 4, 6. Supply and discharge channels are formed by axial holes made in discs, coaxial to holes 7, 9 made in covers 4, 6 and crossing axial holes by radial slots extending on cylindrical gear surface of wheel 2.

EFFECT: invention is aimed at increasing durability and reliability of rotary hydraulic machine.

3 cl, 12 dwg