SU1513232A1 - Gas ejector - Google Patents

Abstract

The invention relates to the field of jet pump engineering and can be used in the design of hydrotransport systems. The aim of the invention is to increase work efficiency and size reduction. An insert 5 is installed in the mixing chamber 2, having a central 6 and peripheral 13 channels. Channel 6 has inlet and outlet cone extensions 9, 10 with sharp edges 11, 12. The gas flow from the supersonic active nozzle mixed with the passive gas enters the mixing chamber 2 and then into the channels 6, 13 of the insert 5 and the peripheral channel 4 Due to the formation of oblique shocks on sharp edges 11, 12, conical extensions 9, 10, and channels 6, 13, the flow is slowed down with small losses of total energy. By withdrawing low pressure 14 a small portion of the gas may be withdrawn to the inlet of the electrode. 1 hp f-ly, 2 ill.

Description

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with

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31513232

The invention relates to pump construction, in particular, to the design of a gas ejector, and can be used in the design of hydrotransport systems of the general air pump. value.

The purpose of the invention is to increase efficiency and reduce size .10

. Figure 1 shows the gas ejector, longitudinal section; FIG. 2 shows an ejector on the inset, a cross section.

A gas ejector containing a coaxial supersonic active nozzle 1, 15 mixing chamber 2, diffuser 3 and a cylindrical insert 5 with a central channel 20 that has an input channel 7 and 15 at the inlet of the peripheral channel 4, installed in the mixing chamber 2 outlet 8 are tapered expansions 9 and 10 with sharp edges 11 and 12, while in the insert 5 there is a series of parallel channels 13, similar to the central channel 6 and evenly spaced around the circumference, and the ejector can be equipped with a low pressure outlet 14 koak ialno diffuser 3, Box 5 mates with diffuzo- rum 3 and the outlet 14 communicates with a peripheral channel 4.

The ejector works as follows.

When displacing the ejected gas | 5 with the active gas in the initial part of the mixing chamber 2, the flow of the mixture of gases enters the cylindrical part of it. The flow core along the velocity profile expands and is leveled, and a boundary layer is formed near the wall .40. With

When the flow enters channels 6 and 13 of the insert 5, the flow cores are slowed down in oblique jumps of the seals with insignificant total pressure losses. In channels 6 to 13 of the insert 5, the supersonic flow decelerates to a speed close to the sonic one; in the output conical extensions 10 of the insert 5, the flow is expanded and in the forward jump turns into subsonic. Further expansion of the flow takes place in the diffuser 3. A negligible part of the gas flow through the peripheral channel 4 passes into the low pressure outlet 1 and is transferred to the low pressure area or to the inlet of the ejector.

Claims (2)

Invention Formula 1 A gas ejector containing a coaxial supersonic active nozzle mixing chamber, a diffuser and a cylindrical insert with a central channel having sharp edges at the inlet and outlet connected to the peripheral channel, forming a peripheral channel; - neither work efficiency nor size reduction, in the insert there is a series of parallel channels similar to the central channel and evenly spaced around the circumference. 2. The ejector according to claim 1, of which is equipped with low pressure water, located coaxially to the diffuser, the insert is connected to the diffuser, and the outlet is connected to the peripheral channel. / J fzg.2