| 摘要 |
<p>A valve for releasing the pressure of a working medium comprises, mounted inside a casing (1) along its longitudinal axis (5), a main (9) and a subsidiary (32) closing members with a rod (36) mounted between them, and a means (38) for shifting the subsidiary closing member (32) to its initial position. The valve further comprises: a pulse drive (18) which includes a hollow cylinder (19) mounted in the casing (1) coaxially with the rod (36), the rim (30) on its internal surface (31) of one of its end-faces (29) interacting with the subsidiary closing member (32); a hollow piston (20) mounted movably inside the hollow cylinder (19); at least two in-phase interconnected piezoceramic plates (17) one of which is rigidly connected to the casing (1) and the other to the piston (20); and a switching unit (27) connected to the piezoceramic plates (17).</p> |
