| 摘要 |
An impulse tolerant valve body is longitudinally deformable, acting through its convex valve seat interface and a concave valve seat to beneficially reduce closing energy impulse amplitude, increase impulse duration, damp induced resonance vibrations, and narrow the characteristic vibration spectrum. Elastic longitudinal valve body deformability results from elasticity in valve body construction materials and, in certain embodiments, from at least one fluid-filled internal elastic space in fluid communication with at least one internal surge chamber via at least one fluid flow restrictor. Fluid flow from elastic space to surge chamber allows substantially central longitudinal valve body compression, followed by elastic valve body rebound with reverse fluid flow. Beneficial effects are achieved through dissipation of impulse energy as heat lost through fluid flow friction and valve body hysteresis. The valve body's tendency to deform centrally causes slight rotation of its convex valve seat interface on the correspondingly-curved concave valve seat.
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