| 摘要 |
FIELD: machine building. ^ SUBSTANCE: flow runs through case (10, 12) of valve at least along part of its length. A guide (16) of a piston is arranged in the case of the valve. Spring loaded piston (20) of the valve is inserted into the guide and it pressure tight shuts the guide off. Concave surface (29) attacking flow is located on an end surface of piston (20) of the valve. In particular this surface has axial tangent on the side of flow attacking, while on the side of running off flow this surface has radial tangent. Guide (16) of the piston has concave stabilising surface (34). The latter has radial tangent on the side of flow attacking and axial tangent on the side of flow running off. At valve opening by means of deflected surface (29) of flow attacking in radial direction, surface (34) repeatedly deflects fluid medium in axial direction and directs it to reflecting surface (26) radially oriented on the piston of the valve so, than piston (20) of the valve is loaded with dynamic pressure of fluid medium in axial direction. ^ EFFECT: raised efficiency of safety valve actuation. ^ 8 cl, 6 dwg |
