초록 ▼

A fluid jet ejector and ejection method wherein a plurality of high velocity jet streams of a primary fluid are discharged through a vacuum chamber into a convergent-divergent diffuser or nozzle to draw a secondary fluid into the chamber in such manner that the secondary fluid is entrained within fl

A fluid jet ejector and ejection method wherein a plurality of high velocity jet streams of a primary fluid are discharged through a vacuum chamber into a convergent-divergent diffuser or nozzle to draw a secondary fluid into the chamber in such manner that the secondary fluid is entrained within flow spaces formed between the jet streams and is carried from the chamber through the diffuser means by the jet streams. A modular fluid jet ejector composed of multiple parts which may be economically manufactured and assembled, and a fluid jet ejector assembly consisting of multiple stacked fluid jet ejectors which may be coupled in parallel to provide a high jet pumping rate. Preferred embodiments of the fluid jet ejector include features for directing primary fluid to a flow space at nozzle exits to fill the space with primary fluid to eliminate or greatly reduce the presence of primary fluid therein, thus greatly increasing the efficiency of the ejector device, these features comprising a fluid passage about an exhaust tube for directing primary fluid flow to the flow space.

대표청구항 ▼

A fluid jet ejector comprising: a body containing a fluid passage including a primary fluid inlet for receiving a pressurized liquid, a fluid outlet, a vacuum chamber between said inlet and outlet, at least one group of jets communicating said inlet to said chamber, a convergent-divergent diffuser c

A fluid jet ejector comprising: a body containing a fluid passage including a primary fluid inlet for receiving a pressurized liquid, a fluid outlet, a vacuum chamber between said inlet and outlet, at least one group of jets communicating said inlet to said chamber, a convergent-divergent diffuser consisting of an upstream convergent compression chamber and a downstream divergent expansion chamber associated with each jet group and communicating said chamber to said outlet, and a secondary fluid inlet opening to said chamber for receiving a gas, each of the jets consisting essentially of a circular opening in a wall oriented transverse to the fluid passage and located between said primary fluid inlet and said vacuum chamber, the wall forming part of a cup-shaped insert having a cylindrical body closed at one end by the wall, the jets of each jet group being aligned with the associated diffuser to discharge a plurality of relatively high velocity jet streams of said liquid through said chamber into the associated diffuser, and the jets of each jet group being arranged in a two dimensional array when viewed along their axes, such that the several jet streams which issue from the jets of each jet group are laterally spaced to form between the adjacent jet streams within the vacuum chamber flow spaces in which gas entering the chamber through said secondary fluid inlet is entrained, whereby the entrained gas is carried from the chamber by the jet streams.