| 摘要 |
FIELD: machine building. ^ SUBSTANCE: invention relates to field of designing of shock-wave tunnels and, particularly its input blocks. Valve assembly contains membrane from polymer film. Polymer film is installed with ability of interaction with heating elements in the form of wire ring. Wire ring is held on reference ring from electric insulating material. Heating element is implemented as consisting of two half-rings, electrically parallel connected to each other, and fixed on end surface reference ring at a distance from edge of its central opening. This distance is selected from condition of exclusion of heating element escape out end surface of reference ring at thermal dilatation of heating element. ^ EFFECT: invention is directed to even opening by circumference of membrane by means of heating element and operating pressure range extension in high-pressure chamber. ^ 2 cl, 4 dwg |
