초록 ▼

In the vane machine of the invention the wear-causing pressure differences at the opposite ends (16,18) of the vanes (15) are at least partially reduced, especially during the reversing stages of the vanes (15). A compression gate valve (35) without a valve spring integrated in the vane machine is p

In the vane machine of the invention the wear-causing pressure differences at the opposite ends (16,18) of the vanes (15) are at least partially reduced, especially during the reversing stages of the vanes (15). A compression gate valve (35) without a valve spring integrated in the vane machine is provided for this. It provides a constant pressure ratio of the pressure with which a vane is pressed against the lift ring during a reversing stage to the system pressure. By controlling the pressure ratio in this way an undue amount of friction of the vanes (15) on the lift ring (20) is avoided, also at high system pressure.

대표청구항 ▼

[ We claim:] [1.] A vane machine comprising a housing (H) provided with an inlet connector (IC) and an outlet connector (OC) and a mechanism (10) accommodated in the housing; said mechanism (10) comprisinga rotatably mounted rotor (12) provided with a plurality of circumferentially distributed radia

[ We claim:] [1.] A vane machine comprising a housing (H) provided with an inlet connector (IC) and an outlet connector (OC) and a mechanism (10) accommodated in the housing; said mechanism (10) comprisinga rotatably mounted rotor (12) provided with a plurality of circumferentially distributed radial slots (14) defined by rotor walls (14') of the rotor,a plurality of vanes (15) each having a first end (16) and a second end (18) opposite the first end, each of said vanes (15) being guided movably in one of the radial slots (14) with the first end thereof inside said radial slot to form a compression chamber (17) therein bounded by said rotor walls, and the second ends (18) of said vanes are located outside the radial slots,a lift ring (20) having an inner circumferential portion provided with a mechanism wall (19) and mounted eccentrically in said housing around said rotor (12) so as to have an eccentricity (23) relative to said rotor, said mechanism wall (19) of the lift ring (20) cooperating with said second ends (18) of the vanes to move each of the vanes in the radial slots through a compression stage, a vacuum stage, a first reversing stage and a second reversing stage during a revolution of the rotor (12) to simultaneously force a volume change in each of the compression chambers (17), andmeans for facilitating radial motion of the vanes in the radial slots (14) as soon as each of said vanes (15) passes through said first reversing stage and said second reversing stage, said means for facilitating the radial motion of the vanes including at least one beveled edge (BE) provided on the second end (18) of each of the vanes to facilitate the radial motion of the vanes during the first reversing stage, and means for controlling and adjusting a compression chamber pressure of a pressurized medium provided in said compression chamber (17) and acting on said first end (16) of each of said vanes (15) to an intermediate pressure depending on a system pressure when said vane passes through said second reversing stage, so as to maintain a constant pressure ratio of said intermediate pressure to said system pressure, said means for controlling and adjusting comprising a gate valve (35) integrated in said housing (H).