FIELD: engines and pumps.
SUBSTANCE: invention relates to machine building, particularly to positive-displacement rotary machines. Machine chamber comprises housing, rotor with output shaft running in said housing and having work surface concentric with its rotational axis, and at least one piston. Said work surface consists of surface inclined to rotor rotational axis and segment of sphere limited by aforesaid inclined surface. Housing and rotor work surfaces make work chamber. Rotor work surface has at least one slot arranged along rotor rotational axis. Rotor every slot accommodates piston to cover and seal work chamber and to run in slot plate. Piston represents, at least, a part of disk with at least one sealing synchronising element to interact with the housing inclined surface. Said element is coupled with piston with the help of pivot joint arranged on aforesaid sealing synchronising element. The latter represents two aligned cylindrical recesses and mating pivot joint arranged on piston to revolve relative to piston. Cylindrical ledge is arranged between aforesaid cylindrical recesses.
EFFECT: possibility to be used in multi-stage deep-well pumps.
13 cl, 20 dwg
