| 主权项 |
1. A disk rotary valve assembly for reciprocating piston positive displacement machines, the disk rotary valve assembly comprising at least:
a cylinder (30); a cylinder head (5); a piston (40) reciprocally fitted in the cylinder (30); a chamber (50) defined inside the cylinder (30), the chamber (50) is sealed at one side by the piston (40), the chamber (50) is sealed at another side by the cylinder head (5); the cylinder head (5) comprising passageways (20, 17) for the introduction of gas in the chamber (50) and for the evacuation of the chamber (50) from the gas; the cylinder head (5) comprising a pair of oppositely arranged chamber ports (12), each chamber port comprising a lip (13) at its end; a disk rotary valve (1), the disk rotary valve (1) being rotatably mounted in the cylinder head (5), the disk rotary valve (1) rotating about a rotation axis (60) in synchronization to the piston reciprocation; the disk rotary valve (1) comprising a pair of oppositely arranged fronts (8), each lip (13) being in gas tight sealing cooperation with a respective front (8) of the disk rotary valve (1), the orthogonal projections of the oppositely arranged fronts (8) on the rotation axis (60) of the disk rotary valve (1) being at a substantial distance from each other; the disk rotary valve (1) comprising valve ports (10, 9), during a part of a rotation of the disk rotary valve (1) the chamber (50) communicates, through the valve port (10, 9) with passageways (20, 17), during another part of a rotation of the disk rotary valve (1) the fronts (8) seal the chamber ports (12), isolating the chamber (50) from the passageways (20, 17), the chamber ports (12) being arranged so that the total force applied on the disk rotary valve (1) due to a high pressure inside the chamber (50) to be several times smaller than the force applied separately on each front (8) due to the same high pressure inside the chamber (50). |
