RU2643882C1 - Jet pump - Google Patents

Abstract

FIELD: engines and pumps.

SUBSTANCE: device consists of a casing, a passive medium supply pipe, connected with each other by a coupling, a mixing chamber enclosed by a diffuser. In the axial channel of the supply pipe there is a nipple with a nozzle holder, on the lower end of which there is a free attachment, pressed by a nut. A tangential channel is formed in the body of the coupling, which connects the axial channel of the supply pipe of the active medium and the receiving chamber. In the body of the supply pipe of the passive medium, longitudinal grooves, covered by a body of a glass provided with fingers passed through longitudinal grooves to be brought into engagement with a nipple along a circumferential groove, are provided. In the axial channel of the supply branch pipe of the active medium supply, a flow controller is installed in the form of a figured bushing with a conical flat tip entering the tangential channel with the formation of a slot gap. On the outer surface of the figured sleeve, an annular groove is provided, in which there are cams provided with screws extending beyond the supply pipe of the active medium.

EFFECT: increase the efficiency of mixing.

2 dwg

Description

The invention relates to inkjet technology and may find application in the oil and gas industry for the generation of aerated liquids or foams.

Known inkjet apparatus (see AS 909349 USSR. M class F04F 5/16; No. 2935524 / 25-06; claimed 04.16.1980; publ. 02.28.1982. Bull. No. 8), containing a receiving chamber with an active nozzle installed therein, a control chamber, a mixing chamber and a diffuser. A temperature-sensitive element is installed in the control chamber, the ends of which are fixed to the nozzle and the wall of the control chamber. The latter is equipped with nozzles for supplying and discharging the coolant.

Design disadvantages:

- the complexity of the control system;

- low accuracy of tuning the inkjet apparatus to the optimal technological mode, namely, a change in one component of the device is the axial movement of the active nozzle. But the accuracy of adjustment of the inkjet apparatus also depends on its diameter, the distance between the nozzle and the entrance to the displacement chamber, the length of the axial channel of the diffuser and confuser. Changing these parameters during operation is quite difficult;

- the working fluid is fed into the receiving chamber through the active nozzle with the suction of a passive medium, for example gas, through the side pipe, which reduces the pressure coefficient of the mixture at the outlet of the device. This is due to the fact that the interaction of the working fluid with a passive medium for its compression can take place only from the outside along the perimeter of the jet flowing from the active nozzle.

Known water-air (liquid-gas) ejector (see. "Inkjet apparatus" / E.Ya. Sokolov, NM Singer. - M .: Energoatomizdat, 3rd ed., Revised., 1989. - S. 213- 215). The working medium is water supplied under pressure to the nozzle, at the outlet of which it acquires a high speed. A stream of water flowing out of the nozzle into the receiving chamber carries air along with it through the lateral supply pipe into the chamber, after which the total flow enters the mixing chamber and diffuser, where pressure increases.

Water-air ejectors are also known (see ibid.), In which the working fluid is supplied to the mixing chamber through several working nozzles or one nozzle with several holes. This leads to an increase in the contact surface of interacting media, which leads to a slight increase in the injection coefficient.

Known liquid ejector (see "Machines and oil equipment". M: VNIIOENG, 1983. - S. 5-6). The ejector contains an inlet and outlet nozzles with quick-release nuts, a nozzle for connecting to an active medium supply pump and a compressor for supplying a passive medium, a mixing chamber, a diffuser and a confuser. The device is connected simultaneously to the pump unit and low-pressure compressor. When the active medium is fed into the inlet pipe and when a high-speed jet of working fluid flows out of the nozzle, the gas is sucked in and interacts with the surface of the flowing jet of working fluid, mixing the two components in the mixing chamber and moving the mixture into the diffuser and confuser. In this case, aeration of the working fluid occurs while maintaining the working pressure at the ejector outlet.

Design disadvantages:

- the design of the ejector implies its effective use only in the range of parameters of the flow rate of the working fluid and pressure, the flow rate of the gaseous agent, the design dimensions of the nozzle, mixing chamber, diffuser and confuser. This determines the receipt at the outlet of the ejector of aerated liquid with certain parameters. Those. effective operation of the ejector is possible in a limited range without the possibility of changing the operating mode. Obtaining aerated liquid with such a strapping scheme, when the active working fluid is supplied through the axial channel, is not effective enough.

A well-known jet pump (see AS 1359499 USSR. M class F04F 5/10; No. 4086069 / 25-06; claimed. 07.07.1986; publ. 12/15/1987. Bull. No. 46), adopted by the authors for the prototype .

The device consists of a pipe for supplying a passive medium connected to a receiving chamber. Another pipe for supplying a passive medium is located in the axial channel of the active nozzle with the formation of an annular active nozzle and an intermediate mixing chamber. The pipe is provided with longitudinal radial ribs and form channels for supplying a passive medium with the pipe wall. The longitudinal ribs are made spiral. The mixing chamber is hydraulically connected to the diffuser.

Device operation

The active medium, when flowing out of the annular active nozzle, entrains the passive medium entering the intermediate mixing chamber through the channels formed by the radial ribs. The mixture of media when it flows from the active nozzle carries the passive medium from the nozzle into the mixing chamber and then the mixture enters the diffuser, where the kinetic energy of the flow of the mixture of active and passive media is converted into potential energy.

There is no mechanism for regulating the flow of active and passive media, the resulting mixture with specified technological parameters. The process can be controlled by changing the flow rate and pressure of the active and passive media, which is not effective enough in some cases. According to the theory of the operation of jet pumps, the efficiency (Efficiency) of these devices was in the range of 30-35% with optimal design parameters of the nozzle, mixing chamber, diffuser, and so on, i.e. the scope of the above device is limited.

The technical result that can be obtained by carrying out the invention is as follows:

- the ability to control the process of compressing gas, obtaining aerated liquids (foam systems) due to the axial movement of the nozzle relative to the mixing chamber;

- the ability to control the feed rate of the active medium to optimize the operation of the device by changing the live section of the gap gap by moving the figured sleeve in the axial channel of the inlet pipe of the active medium;

- the possibility of increasing the efficiency of mixing and compression of two-phase aerated liquids by supplying a passive medium through the axial channel of the receiving pipe to the nozzle;

- the ability to supply the active medium through the inlet pipe and the gap in the mixing chamber perpendicular to the axis of the nozzle with a swirl in the tangential channels, with a change in the radius of twist from a larger diameter to a smaller one and a pressure drop in the center of the stream;

- the possibility of suction of the passive medium (gas) into the funnel formed by the rotating active medium (liquid), and their mixing in the mixing chamber.

The technical result is achieved in that the jet pump contains a receiving chamber with a nozzle, a mixing chamber, nozzles for supplying a passive and active medium, a diffuser. The passive medium supply pipe is provided with longitudinal grooves and connected by a coupling to the mixing chamber body to form a receiving chamber and contains a nipple with an annular groove in the axial channel. On the outside of the passive medium supply pipe, a cup is provided with fingers passing through the longitudinal grooves in the passive medium supply pipe with the possibility of placing a nipple in the annular groove, at the lower end of which a nozzle is mounted with the possibility of rotation, preloaded by the nut. A tangential channel is made in the coupling body, and a figured sleeve with an axial feed channel, a tapered flat tip and an annular groove on the outside equipped with cams with drive screws is installed in the axial channel of the active medium supply pipe.

In this case, the figured sleeve is installed with the possibility of introducing a conical flat tip into the tangential channel of the coupling with the formation of a gap gap.

The design of the device is illustrated by drawings, where:

- figure 1 shows a General view of the device in section;

- figure 2 is a top view of the adjusting device in the supply pipe of the active medium.

The jet pump consists of a receiving chamber 1, formed by a pipe for supplying a passive medium 2, a connecting sleeve 3 connected to the housing 4, in the axial channel of which a mixing chamber 5 is installed, which is covered from below by the body of the diffuser 6, with a connecting thread 7 for quick connection for communication with the consumer .

In the axial channel 8 of the inlet pipe of the passive medium 2 is mounted axially movable with a nipple 9 connected to the nozzle holder 10, at the lower end of which there is a nozzle 11 of the passive medium with a conical axial channel 12 and an external curved surface 13.

The nozzle 11 is equipped with an annular protrusion 14 and freely enters the axial channel of the nozzle holder 10, where it is kept from falling out with a union nut 15.

The nozzle 11 is placed in the receiving chamber 1, which through the tangential channel 16 in the body of the coupling 3 is hydraulically connected to the axial channel 17 of the pipe 18 for supplying an active medium. In the axial channel 17 of the pipe 18, a figured sleeve 19 is installed with a conical flat tip 20 entering inside the tangential channel 16 (see FIG. 2) with the formation of a gap gap 21. Inside the figured sleeve 19, an axial channel 22 is supplied that hydraulically connects the axial channel 17 of the pipe 18 with a gap of 21.

On the outside of the figured sleeve 19, annular grooves 23 are made for installing the sealing rings 24 and an annular groove 25 in which cams 26 are provided, provided with screws 27 for limited axial movement of the figured sleeve 19 in the axial channel 17 of the pipe 18.

Two longitudinal grooves 28 are made in the body of the pipe 2 for supplying a passive medium, into which fingers 29 are inserted, rigidly connected to the body of the cup 30, covering the body of the pipe 2 for supplying a passive medium, and a threaded connection associated with it.

The nozzle holder 10 is threaded to a nipple 9 provided on the outside with an annular groove 31 into which the ends of the fingers 29 are freely inserted.

The annular gap between the coupling 3 and the outer surface of the pipe 2 for supplying a passive medium is sealed with a sealing ring 32. The annular gap between the outer surface of the mixing chamber 5 and the housing 4 is closed by the sealing ring 33. The gap between the mixing chamber 5 and the diffuser 6 is closed by the sealing ring 34.

The jet pump operates as follows.

The pipe 2 for supplying a passive medium through a quick-detachable connection is connected with the discharge line of the compressor. The pipe 18 for supplying an active medium is connected to the pump unit.

The active medium is fed into the axial channel 17 of the pipe 18, from where it is supplied through the slot 22 of the sleeve 19 through a slit gap 21 to the tangential channel 16 with an exit into the receiving chamber 1. This causes the flow to twist, which is introduced along the curved surface 13 of the nozzle 11 into the axial channel mixing chamber 5 with a change in the radius of the swirl of the stream to a smaller one. Since the nozzle 11 is installed in the nozzle holder 10 freely, the nozzle 11 can also rotate due to interaction with the flow. According to the continuity equation, when it is twisted with a transition to a smaller swirl radius, its velocity increases with a decrease in pressure in the center. The passive medium flow along the conical axial channel 12 of the nozzle 11 is drawn into the receiving chamber 1 and interacts with the active medium, which covers the gas stream and compresses it.

As the mixture of passive and active media moves, they are mixed with the acquisition of the necessary kinetic energy and its subsequent transformation into potential pressure energy when passing through the diffuser 7 with further supply of the mixture to the consumer.

To optimize the operating mode of the jet pump, a change in the flow rate and speed of the active medium is provided. This is achieved by the fact that due to the transmission of torque through the screws 27 to the cams 26 located inside the annular groove 25 of the figured sleeve 19, the figured sleeve 19 is moved in the axial direction. Thus, the conical flat tip 20 is introduced or withdrawn from the tangential channel 16 with a change in the cross section of the gap gap 21, and hence the flow rate of the active medium supplied into the receiving chamber 1.

Rotating the nozzle 30 relative to the body of the nozzle 2 during the interaction of the fingers 29 with the body of the nipple 9 along the annular groove 31, the nipple 9 is axially moved together with the nozzle holder 10 and the nozzle 11 inside the receiving chamber 1 with a change in the distance between the nozzle 11 and the mixing chamber 5. This changes the mode jet pump operation.

Such adjustment to the optimal technological mode of operation of the jet pump can be made directly during operation, stopping the process and dismantling the device from the installation site for reconfiguration and changing the operating mode is not required.

Claims (1)

An inkjet pump containing a receiving chamber with a nozzle, a mixing chamber, pipes for supplying a passive and active medium, a diffuser, characterized in that the pipe for supplying a passive medium is provided with longitudinal grooves, connected by a coupling to the housing of the mixing chamber to form a receiving chamber, and contains a nipple in the axial channel with an annular groove and a cup on the outside, equipped with fingers passed through the longitudinal grooves of the passive medium supply pipe with the possibility of placing a nipple in the annular groove at the lower end where the nozzle is mounted in the nozzle holder with the possibility of rotation, pressed by a nut, and a tangential channel is made in the coupling body, and in the axial channel of the active medium supply pipe there is a figured sleeve with an axial supply channel, a tapered flat tip and an annular groove provided with cams with drive screws, installed with the possibility of introducing a conical flat tip into the tangential channel with the formation of a gap gap.

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