| 摘要 |
<p>A new and improved fluid restrictor means for use in a valve structure, as a backpressure plate, or the like and generally comprising a plurality of close-fitting mating cylindrical parts each of said parts including a plurality of openings spaced across the surface thereof. The mating parts are rigid in construction and arranged and configured whereby they are in a contacting relationship and the openings of contiguous mating parts are in an overlapping relation to form restricting orifices for flow communication between complementary openings. The volume of each of the openings is sufficient to form an expansion chamber for high pressure fluid flowing thrugh the restrictor means. The disclosed fluid restrictor means provides a structure which is easily arranged according to precise engineering specifications for a particular application. For example, all of the dimensions for the expansion chambers and restricting orifices are determined by the size of the openings in the mating parts, the thickness of the parts and the relative positions of the mating parts when in the final assembled form. These factors are determinable with great mathematical exactness and the present invention permits a highly precise implementation of the predetermined flow path characteristics into the structure of the disclosed fluid flow restrictor means.</p> |
