| 摘要 |
<p>A floating plate gas valve comprising a core of magnetically susceptible material. A wire coil (3) is wound about the core to form an electromagnet when current is passed through the wire. A sleeve (4) of magnetically susceptible material forms part of the magnetic circuit. A shaped pole-piece (5) on the core serves to increase the area over which attractive magnetic force is generated, increasing the force resulting from a given number of ampere-turns. Air or gas is supplied through a passage in the core. The air-flow through the valve is regulated by its passage through an annular region between the pole-piece and the floating plate (8) made of ferromagnetic material using the Coanda effect. A housing (9) serves to contain the emerging air or gas and permits its connection to an output device. Also disclosed is a dual floating plate gas valve useful for effecting pressure and force control of a pneumatic cylinder.</p> |
