| 摘要 |
<p>A rotary piston machine including an interface fluid valve mechanism comprising a flat blank surface, a rotary valve member, and a stationary valve member having a stationary valve face disposed substantially parallel to said flat blank surface and being axially spaced therefrom, said rotary valve member comprising a flange body and a hollow extension body axially extending therefrom, said flange body having a rotating valve face sealingly confronting said stationary valve face and defining therewith a commutating interface valve, said hollow extension body terminating in a hollow blank surface sealingly confronting said flat blank surface and defining therewith a blank interface seal, one of said blank surfaces comprising a master surface disposed to resist frictional wear during rotation of said rotary valve member and the other of said blank surfaces comprising a wear-in servant surface disposed to be less resistant to frictional wear than that of said master surface and being wearable thereby, said rotary valve member being subject to an axial fluid force in a direction tending to urge said rotating valve face towards said stationary valve face and tending to separate said master surface away from said wear-in servant surface, said wear-in servant surface being thereby protected from wearing out.</p> |
