DEVELOPMENT OF AN ALL-FLUID PNEUMATIC PRESSURE REGULATOR.

摘要

The requirements of an all-fluid pneumatic pressure regulator (having no moving parts) have been investigated and several regulation concepts have been studied and designed. The three major pressure regulator subsystem functions are: (1) throttling, (2) feedback signal transfer,and (3) reference,or error detection. The throttling function is adequately performed by a vortex fluid state device. The feedback signal transfer is adequately performed by a confined-jet fluid state amplifier,and the reference or error detection is a built-in phenomenon of the confined-jet amplifier. These confined-jet amplifiers combine high supply pressure recovery with low control-to-supply pressure ratio. An alternate hybrid regulator that avoids the limitations imposed by the vortex throttle element and uses a mechanical variable area is investigated. This device is extremely practical,having a minimum of moving parts while retaining the high reliability and other desirable characteristics of a completely all-fluid system. (Author)