SU112242A1 - Hydraulic ejector - Google Patents

Description

The invention relates to hydraulic ejectors of a multi-nozzle type of high air flow for steam turbine installations operating on the principle of using the kinetic energy of a water jet.

Multi-nozzle type hydraulic ejectors for steam-turbine installations with an inlet water distribution chamber for working water, with a system of parallel nozzles at the outlet of this chamber, placed in the suction chamber into which the vapor-air mixture enters, and with a system of parallel diffusers installed behind the suction chamber are known.

However, it is not possible to increase productivity with them simultaneously. The reduction in the consumption of working water, and the layout and design of this auxiliary turbine equipment are characterized by complexity, considerable technological complexity and metal consumption.

In the described ejector, these drawbacks are eliminated by the fact that behind the diffusers of the ejector there is a common outlet cone for them, equipped with a centrally located tube for suction air inlet. The nozzle also serves to create in its central part — the action of passing water — an additional ejecting effect used for additional suction of air.

FIG. 1 shows a general view of a hydraulic ejector in longitudinal section; in fig. 2 is a plan view; in fig. 3 is a side view; in fig. 4 is a partial section of the ejector.

The ejector consists of a welded body 1 with four nozzles located inside .; Water is poured into the casing from above to the chamber 3 with internal partitions forming windows of different size, which ensures even distribution of the flow of water through the nozzle 4 of the working water inlet to the four nozzles. To the bottom number 112242

In this part of the welded body, four molded diffuser nozzles 5 are made, each made of two parts. The lower ends of the diffuser nozzles are installed in the recesses of the disk 6, which is attached to the flange of the cone adapter 7.

Through the central part of the disk 6 with some penetration into the tapered transition nozzle 7, a small diameter tube 8 is prowed with a flange, to which, during operation of the ejector, additional sucked air is supplied.

The operation of the hydraulic ejector is scored as follows.

Working water under pressure flows through the nozzle 4 into the water chamber 5, from where uniform flows into the nozzle chambers 9. In the salt 2, water, due to the pressure difference in the suction chamber 10 and the nozzle chambers 9, acquires great speed. At this speed, the water passes through the mixing chamber 11 and carries the vapor-air mixture that enters the chamber through the pipe 12.

In diffusers, the velocity of the water decreases and its kinetic energy is spent on compressing the air mixture to atmospheric pressure at which it is ejected from the ejector. In the process of suction of the vapor-air mixture and its compression in the diffusers, the vapor in the mixture is concentrated.

The water passing through the diffusor nozzles 5 at a known speed with the aid of a transition cone nozzle whose dimensions and conicity are established experimentally creates an additional ejecting effect in its middle part.

Subject invention

Multi-nozzle type hydraulic ejector for steam-turbine installations with an inlet water distribution chamber for working water, with a system of parallel nozzles at the outlet of this chamber, placed in the suction chamber into which the vapor-air mixture enters, and with a system of parallel diffusers installed behind the suction chamber, characterized by that, in order to increase the efficiency of the ejector by air while reducing the flow of working water, as well as to simplify the layout and design of auxiliary turbines th equipment for diffusers installed common to output them tapered pipe provided with a centrally located inlet tube therein exhausted air and serving to create in its central portion extending action of ejecting the additional water effect, used for additional air suction.

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