| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent noises of a poppet valve due to a fluid flow through a valving interface from generating by keeping the static pressure higher than the vapor pressure of liquid flowing through the valving interface of the poppet valve. SOLUTION: When the force applied to the end face of a poppet 14 due to fluid pressure in a second bore 42 becomes larger than the total sum of a spring 16 force and fluid pressure applied to the other end of the poppet 14, the poppet 14 begins to move in the direction spacing from the valve seat 46. When the poppet 14 is spaced from the valve seat 46, a small orifice is formed, and the fluid flows therethrough. The passing territory of fluid is formed out of a first convex contoured surface 32 and the outermost side part of the valve seat 46. Flow speed becomes maximum in the smallest territoy. By keeping the static pressure higher than the vapor pressure, noises of a poppet valve 10 generated by a fluid flow through the valving interface is removed or substantially reduced.</p> |
