| 摘要 |
<p>A seal for a fluid jet apparatus includes an assembly with a head portion and a stem portion. A body (20) has a bore (22) formed therein, the bore has an upstream portion (30) of a first diameter, a downstream portion (34) of a second diameter which is less than the first diameter and an axially extending converging portion (32) which connects upstream and downstream portions. The stem portion (14) has a lesser dimension than said second dimension. The stem portion (14) is disposed within the downstream portion and the head portion (12) is disposed within the upstream portion. The upstream portion (30) extends for a considerable distance upstream of the head portion (12). A maximum cross section of the head portion is less than the first diameter and greater than the second diameter, and a surface to surface seal is formed between the head portion and the axially extending converging portion. This seal may be applied to either a nozzle or a swivel of a fluid jet assembly.</p> |
