HELICAL HYDRAULIC MACHINE WITH A BALANCED ROTOR Russian patent published in 2018 - IPC F01C1/107 F04C2/107 

FIELD: hydraulic engineering.

SUBSTANCE: invention relates to helical gerotor hydraulic machines and can be used for screw motors or general purpose pumps. Hydraulic machine comprises stator 1 with internal helical teeth 2 located along the length of its active part, serving as a support for teeth 3 of rotor 4, and rotor 4 mounted inside stator 1 with external helical teeth 3, number of which is one less than the number of teeth 2. Ratio of the length of the active part of stator 1 to the outer diameter of teeth 4 is configured to flexibly bend rotor 4 on this length – not less than the height of teeth 2, 3. Coincidence of the steps of the profiles of teeth 2, 3 occurs in a plane twisted as a helicoid around the axis of stator 1, passing along the axis of rotor 4. Rotor 4 is elastically bent at the length of the active part of stator 1, and its axis forms a left or right helical line located around the axis of stator 1, with a radius equal to half the height of teeth 2, 3. Length of the active part of stator 1 accounts for at least a quarter of its turn.

EFFECT: invention is aimed at increasing the service life of the hydraulic machine.

1 cl, 8 dwg