| 摘要 |
An enclosed positive displacement mechanism including a body with an inlet and an outlet; a rotor mounted in the body and rotatable about a main axis; an orbiting piston located in the cavity, rotatable about an eccentric secondary axis and arranged to orbit around the main axis to roll on the internal side surface of the cavity; and a vane located in the cavity, slidable in the piston and mounted in the body between one inlet and one outlet so as to oscillate. The orbiting piston and the vane divide in cyclic manner the cavity into a first and a second chamber with variable volume, which are mutually complementary and communicate with the inlet and the outlet. During a portion of its oscillation, the vane passes through the piston and is in contact with the side surface of the cavity, thereby separating the chambers in a fluid-tight manner. |
| 主权项 |
1. Enclosed positive displacement mechanism, comprising:
a body defining a cylindrical cavity with an internal side surface and having at least a first and a second inlet port and at least a first and a second outlet port intended to allow a fluid to inflow into said cavity and to allow said fluid to outflow from said cavity, respectively; a rotor mounted in said body so as to be rotatable about a main or revolution axis; an orbiting piston, which is located in said cavity, is mounted on said rotor so as to be rotatable about a secondary or rotation axis eccentric with respect to said main axis and is arranged to roll on the internal side surface of said cavity; and a single vane slidable in said orbiting piston, said vane is mounted in a peripheral portion of said body located between one of said inlet ports and one of said outlet ports, contiguous to said one of the inlet ports, so as to oscillate in use, and is mounted in said body so as to pass through said orbiting piston and is guided with a free end of said vane in contact with the internal side surface of said cavity, wherein an arc-shaped sector, which delimits the oscillation of said vane and on which the free end of said vane is arranged to tangentially slide during an entire oscillation, is hollowed out of the internal side surface of said cavity. |
