| 摘要 |
<p>The invention relates to a pneumatically driven control valve for the reversible operation of a pneumatic unit. In an addition to an air distribution system for regulating the speed of the pneumatic unit, the control valve incorporates an air volume control system which is fully integrated into the air distribution system. The key component is a rotary slide valve, the rotation of which distributes the compressed air while its axial displacement throttles the air stream flowing through the valve, the degree of throttling depending upon the pressure level of the compressed air delivered to the pneumatic unit. In this way, the control valve is kept simple in construction with very few moving parts and high functional accuracy.</p> |
