| 摘要 |
<p>The invention concerns the formation of the nign pressure port (12) in a rotary, positive displacement machine (10), such as a gas compressor, with an extension (30) which is traversed by the plane (14) on which the parallel axes of the rotors (16, 18) are commonly positioned. A given portion of the port extension (30) is constantly occluded by the gating rotor (16) and, consequently does not add to the effective area of the port (12). However, the remaining portion of the extension (30) is exposed by the gating rotor (16), effectively defining a port opening (12) which reaches to the common plane (14). Thus, in gas compressor use of the machine, the port extension (30) insures that all the compressed gas product is delivered through the exhaust port (12).</p> |
