CN111306828A - Self-excited micro-jet control multi-tube oscillator - Google Patents
Self-excited micro-jet control multi-tube oscillator Download PDFInfo
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- CN111306828A CN111306828A CN202010235690.4A CN202010235690A CN111306828A CN 111306828 A CN111306828 A CN 111306828A CN 202010235690 A CN202010235690 A CN 202010235690A CN 111306828 A CN111306828 A CN 111306828A
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- 230000010355 oscillation Effects 0.000 claims abstract description 43
- 230000002146 bilateral effect Effects 0.000 claims description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 2
- 238000003698 laser cutting Methods 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 claims 1
- 239000012530 fluid Substances 0.000 abstract description 18
- 230000005284 excitation Effects 0.000 abstract description 12
- 238000005057 refrigeration Methods 0.000 abstract description 6
- 230000000737 periodic effect Effects 0.000 abstract description 5
- 238000012545 processing Methods 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 21
- 230000009471 action Effects 0.000 description 4
- 230000005855 radiation Effects 0.000 description 4
- 238000011160 research Methods 0.000 description 4
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- 230000035939 shock Effects 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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- 230000036541 health Effects 0.000 description 1
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- 230000002459 sustained effect Effects 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
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Abstract
The invention belongs to the technical field of jet control engineering refrigeration of pressure gas, relates to a self-excitation micro-jet control multi-tube oscillator, and is special equipment necessary for gas jet control such as refrigeration machinery. The invention separates the same gas source fluid with the same total pressure as the main jet flow from the main jet flow, introduces the fluid into the self-excitation oscillation cavity from the outside, carries out self-excitation oscillation to generate periodic micro jet flow, pushes and presses the main jet flow on the side of the wall attachment from the vertical excitation port, and oscillates the main jet flow in a push-pull main jet flow mode, thereby improving and sustaining the total pressure, finally achieving continuous oscillation and solving the problem of high energy consumption caused by self-excitation jet flow oscillation. The invention has the characteristics of simple structure, convenient operation and maintenance and the like, does not need additional power, runs stably and reliably, and is a self-excitation micro-jet control multi-tube oscillator suitable for processing high-pressure gas media.
Description
Technical Field
The invention belongs to the technical field of jet control engineering refrigeration of pressure gas, relates to a self-excitation micro-jet control multi-tube oscillator, and is special equipment necessary for gas jet control such as refrigeration machinery.
Background
The jet flow is a special type of fluid motion, and is related to the problem of jet flow in the engineering technical fields of aviation industry, hydraulic engineering, medical health, automatic control and the like, so the jet flow becomes an important content of fluid mechanics research. The fluidic oscillator is based on the fluidic theory, a feedback channel is added on the basis of a fluidic oscillation element to generate fluid oscillation, and flow measurement is realized by measuring the oscillation frequency of the fluid. The theoretical analysis of the jet flow nature and the characteristics is a precondition for researching the jet flow oscillator, and lays a foundation for the research of the micro-channel jet flow oscillator.
The working medium of the fluidic element is a fluid and can be divided into different categories. The fluid flow mechanism inside the element can be classified into three major categories, namely turbulent flow type, wall attachment type and momentum exchange type. The wall-attached fluidic element is a fluidic element formed by a wall-attached effect generated by unbalanced entrainment of fluid in a chamber with a specific shape of a main jet.
Compared with an actuating mechanism of a movable equipment jet flow control device, the static wall-attached jet flow controller has the advantages of good reliability, small volume, high power, low cost and the like, can adapt to severe working environments such as strong radiation, strong corrosion, strong vibration, strong impact and the like, and does not have loss interference. Therefore, the jet flow controller is widely applied to certain control systems in the fields of nuclear industry, aerospace and the like under complex working conditions of high radiation, strong magnetic field, flammability, explosiveness and the like or in pure fluid working systems. Meanwhile, the coanda jet has switchable characteristics, and can realize flow control and fluid measurement, so that the jet controller is also applied to the aspects of hydraulic excitation, jet flow meters and the like of oil exploitation. Bistable coanda jet elements are an important direction of their development.
The gas distributing unit-wall-attached oscillator in static gas wave refrigerator is used to generate oscillating pulse jet and is the embodiment of wall-attached bistable jet element in practical application. In the conventional coanda oscillators, an excitation method of dividing a main jet flow and then returning the main jet flow to act on the main jet flow is adopted, so that the main jet flow is continuously switched to the coanda to form oscillation, and the conventional coanda oscillators are called self-excitation coanda oscillators. According to the different feedback circuits, the feedback circuit can be divided into feedback type, acoustic wave type, resonance type and load type. Self-excitation is simple to implement, but the disadvantage is that the energy loss of oscillation is mostly competitive up to one third.
The self-excited coanda oscillator serves as a gas distribution unit in the static gas wave machine and provides periodic oscillating jet flow for subsequent refrigeration. To date, many studies have been made on three types of coanda oscillators, i.e., a feedback type oscillator, a sonic type oscillator, and a resonant type oscillator. The acoustic wave type wall-attached oscillator is introduced into the static gas wave refrigerator, the two side openings of the cavity of the oscillator are communicated through an acoustic wave tube, and a pressure change signal generated during jet flow wall attachment switching is transmitted to the other side, so that jet flow is switched in a reciprocating mode, and wall attachment oscillation is generated. The sonic oscillation type jet wall-attached oscillation refrigerator has superior operation performance to the conventional refrigerator. The geometrical parameters of the sonic coanda oscillator were studied in detail. However, the research focuses on the influence of the geometric dimension on the oscillator vibratability, the analysis of the flow characteristics of the internal flow field of the oscillator and the influence of the oscillation frequency, and relatively few researches are made on the energy efficiency. The total pressure retention rate K is defined as an evaluation index of the energy efficiency characteristic and the jet flow deflection characteristic of the coanda oscillator, the total pressure loss of the self-excitation type coanda oscillator (positive feedback type, acoustic wave type and resonant type) is large, and the total pressure of the self-excitation flow is reduced and faded early due to the flow channel loss, which is a main cause of energy loss. However, only by the diversion feedback excitation of the main jet flow, no matter how the feedback excitation is realized, the two conditions of increasing the total pressure of the excitation flow and providing the continuous excitation driving force cannot be met.
Disclosure of Invention
In order to solve the problem of high energy consumption caused by self-excitation, the invention provides the self-excitation micro-jet control multi-tube oscillator which has no moving element, simple structure, convenient operation and maintenance, does not need additional power (energy), runs stably and reliably and is suitable for processing high-pressure gas media.
The invention adopts the same gas source fluid which is separated from the main jet flow and has the same total pressure as the main jet flow and is led into the self-excitation oscillation cavity from the outside to carry out self-excitation oscillation to generate periodic micro jet flow, pushes and presses the main jet flow on the side of the attaching wall from the vertical excitation port, and leads the main jet flow to oscillate in a push-pull main jet flow mode, thereby improving and sustaining the total pressure. The self-excited oscillation cavity uses a sonic wave type oscillation jet generator as the micro-jet controller of the invention, thereby distributing the main jet.
The principle of the oscillating jet generator is based on the jet wall bistable effect and the jet steady-state disturbance switching characteristic. Since the stationary refrigerator cannot be supplied with a periodic disturbance source from the outside, a self-excited condition must be required to generate self-excited oscillation, like an electronic oscillation circuit. In the oscillator structure of the acoustic wave type wall-attached oscillator, control ports on two sides of an oscillation cavity are directly connected into a closed pipeline called an acoustic wave tube (control tube). The control tube is an important component of the self-excited coanda oscillator, and the difference of the structural positions of the control tube determines the type and the excitation principle of the self-excited oscillator. In the acoustic wave type wall-attached oscillator, fluid entrainment can occur at the pipe orifice of an acoustic wave pipe, and pressure difference is formed at openings on two sides of the pipe orifice of the acoustic wave pipe. The jet flow is periodically subjected to wall attachment switching under the action of pressure difference to form oscillating jet flow.
The total pressure loss of the self-excitation wall-attached oscillator (positive feedback type, acoustic wave type and resonance type) is large, and the main reason of energy loss is that the total pressure of the self-excitation flow is reduced and faded early due to flow channel loss.
The problem method of the oscillating jet generator corresponding to the energy loss in the invention is as follows: and the same gas source fluid with small part equal to the total pressure of the main jet flow is separated from the main jet flow and introduced into the self-excitation oscillation cavity from the outside to carry out self-excitation oscillation jet flow, and the oscillation micro jet flow becomes a main jet flow excitation source to carry out switching control on the main jet flow.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the self-excited micro-jet control multi-tube oscillator mainly comprises an oscillation machine body 18 and a cold air recoverer 21;
the oscillating machine body 18 comprises a bottom plate, an upper cover 12, a micro-jet inlet pipe 13, an elbow 14, a tee 15, a main jet inlet pipe 16, an inlet pipe 17, a pipe fixer 24 and a receiving pipe 11; the upper surface of the bottom plate is provided with different cavities and runners which are communicated with each other to form a runner 19 of the oscillating machine body 18, and the runner 19 is of a bilateral symmetry structure and comprises a micro-jet inlet cavity 1, a micro-jet nozzle runner 2, a sound wave control pipe 3, a bifurcation runner 4, a main jet inlet cavity 5, a main jet nozzle runner 6, a jet control port 7, an oscillating cavity 8, a multi-pipe bifurcation runner 9, an exhaust port 10 and an exhaust channel 20; the sound wave control tube 3 is positioned at the front end of the oscillating machine body 18 and forms a square ring-shaped flow channel in an enclosing way, the micro-jet inlet cavity 1 and the micro-jet nozzle flow channel 2 are positioned in the square ring formed by the sound wave control tube 3, one end of the micro-jet nozzle flow channel 2 is communicated with the micro-jet inlet cavity 1, and the other end of the micro-jet nozzle flow channel is communicated with the middle position of one edge of the sound wave control tube 3; the forked flow channel 4 is of a bilaterally symmetrical structure and forms a drop-shaped ring flow channel in an enclosing mode, the left portion and the right portion respectively comprise a straight line section and a bent section, the straight line sections are communicated with the bent sections in an end-to-end mode, the outer side ends of the two straight line sections are intersected at the middle position of one side of the sound wave control tube 3, therefore, the forked flow channel 4 is communicated with the micro-jet inlet cavity 1 and the micro-jet nozzle flow channel 2, and the outer side end of the bent section is intersected at the jet control port 7; the main jet inlet cavity 5 and the main jet nozzle flow passage 6 are positioned in a drop-shaped ring enclosed by the branched flow passages 4, one end of the main jet nozzle flow passage 6 is communicated with the main jet inlet cavity 5, and the other end is communicated with the jet control port 7; the oscillation cavity 8 and the multi-pipe bifurcation flow passage 9 are positioned at the rear end of the oscillation machine body 18, one end of the oscillation cavity 8 is communicated with the jet flow control port 7, and the other end is communicated with the front end of the multi-pipe bifurcation flow passage 9; the tail part of the oscillating machine body 18 is provided with a plurality of exhaust ports 10, and the exhaust ports 10 are respectively communicated with each branch at the rear end of the multi-pipe branch flow passage 9; the receiving pipe 11 is arranged on the exhaust port 10 from the outer side of the tail part of the oscillating machine body 18 and is fixed through a pipe fixing device 24;
the upper cover 12 covers the bottom plate, two through holes are formed in the upper cover 12 and respectively correspond to the micro-jet inlet cavity 1 and the main-jet inlet cavity 5, a micro-jet inlet pipe 13 and a main-jet inlet pipe 16 are respectively installed on the through holes, the micro-jet inlet pipe 13 is communicated with the micro-jet inlet cavity 1, and the main-jet inlet pipe 16 is communicated with the main-jet inlet cavity 5; an inlet pipe 17 is arranged outside the upper cover 12, and the inlet pipe 17 is communicated with the micro-jet inlet pipe 13 and the main jet inlet pipe 16 through an elbow 14 and a tee 15;
the tail part of the bottom plate is provided with a plurality of inclined exhaust channels 20 which penetrate through the bottom of the bottom plate, the exhaust channels 20 correspond to the exhaust ports 10, and the exhaust channels and the exhaust ports are communicated with each other;
the cold air recoverer 21 is arranged at the bottom of the tail end of the oscillating machine body 18 and comprises a cold air outlet cavity 23 and a cold air outlet 22, and the cold air outlet cavity 23 is communicated with the cold air outlet 22; the plurality of discharge passages 20 are each communicated with a cold air outlet chamber 23, and cold air is discharged from the cold air outlet 22.
The bottom plate, the upper cover 12 and the cold air recoverer 21 are fixed by bolts 25.
The inclination angle of the exhaust passage 20 is 45 °, and the angle between each bifurcation of the multi-pipe bifurcated flow passage 9 is 10 ° to 50 °.
The oscillating machine body 18 is made of an acrylic plate or metal, is processed by laser cutting, and slowly transits to a circular section at the rectangular section of the oscillating jet flow outlet.
The length of the extension of the end of the receiving pipe 11 can be determined according to the actual requirement, and the pipe joint is connected with the outside.
The invention has the beneficial effects that: the micro jet is used to control the main jet without any sealing of the operating moving parts, and the oscillator has the advantages of good reliability, small volume, high power, low cost and suitability for the expansion refrigerator for processing high-pressure gas medium. And can adapt to severe working environments such as strong radiation, strong corrosion, strong vibration, strong impact and the like, and has no electronic interference. Therefore, the system can be widely applied to certain control systems in the fields of nuclear industry, aerospace and the like under complex working conditions of high radiation, strong magnetic field, flammability, explosiveness and the like or in pure fluid working systems. Meanwhile, the coanda jet flow has switchable characteristics, so that flow control can be realized.
Drawings
FIG. 1 is a schematic diagram of the apparatus for self-exciting microfluidic control of a multi-tube oscillator according to the present invention.
Fig. 2 is a top view of the self-excited microfluidic control multi-tube oscillator of the present invention.
Fig. 3 is a front view of the self-excited microfluidic control multi-tube oscillator of the present invention.
Fig. 4 is a side view of a self-excited microfluidic control multi-tube oscillator of the present invention.
In the figure: 1 efflux inlet chamber, 2 little efflux nozzle runner, 3 sound wave control tube, 4 branch runners, 5 main efflux inlet chambers, 6 main efflux nozzle runners, 7 efflux control mouth, 8 oscillation chambers, 9 multitube branch runners, 10 gas vents, 11 accept the pipe, 12 upper covers, 13 little efflux inlet tubes, 14 elbows, 15 tee joints, 16 main efflux inlet tubes, 17 inlet tubes, 18 vibration organisms, 19 runners, 20 exhaust passage, 21 gas recoverer, 22 air conditioning export, 23 gas outlet chamber, 24 solid pipe wares, 25 bolts.
Detailed Description
The following further describes a specific embodiment of the present invention with reference to the drawings and technical solutions.
A typical embodiment of the invention is as follows:
the same gas source fluid which is separated from the main jet flow and has the same total pressure as the main jet flow is introduced into the self-excitation oscillation cavity from the outside to perform self-excitation oscillation to generate periodic micro jet flow, the main jet flow is pushed and pressed on the side of the attaching wall from the vertical excitation port, and the main jet flow is oscillated in a push-pull main jet flow mode, so that the total pressure is improved and sustained. The self-excited oscillation cavity uses a sonic wave type oscillation jet generator as the micro-jet controller of the invention, thereby distributing the main jet. The length change of the sound wave control tube can change the switching frequency of the micro-jet attached wall.
As shown in fig. 3, the self-excited micro-fluidic control multi-tube oscillator of the present invention mainly includes an oscillating body 18 and a cold air recoverer 21.
As shown in fig. 2, the oscillating machine body 18 comprises a bottom plate, an upper cover 12, a micro-jet inlet pipe 13, an elbow 14, a tee 15, a main jet inlet pipe 16, an inlet pipe 17, a pipe fixer 24 and a receiving pipe 11; different cavities and runners are formed in the upper surface of the bottom plate, the runners 19 of the oscillating machine body 18 are formed after the cavities and the runners are communicated with each other, the runners 19 are of a bilateral symmetry structure and comprise a micro-jet inlet cavity 1, a micro-jet nozzle runner 2, a sound wave control pipe 3, a bifurcation runner 4, a main jet inlet cavity 5, a main jet nozzle runner 6, a jet control port 7, an oscillating cavity 8, a multi-pipe bifurcation runner 9, an exhaust port 10 and an exhaust channel 20.
As shown in fig. 3, the upper cover 12 covers the bottom plate, and the upper cover 12 is provided with two through holes for installing a micro-jet inlet pipe 13 and a main-jet inlet pipe 16; an inlet pipe 17 is arranged outside the upper cover 12, and the inlet pipe 17 is communicated with the micro-jet inlet pipe 13 and the main jet inlet pipe 16 through an elbow 14 and a tee 15; the tail part of the bottom plate is provided with a plurality of inclined exhaust channels 20 which penetrate through the bottom of the bottom plate, and the exhaust channels 20 are communicated with the exhaust port 10.
As shown in fig. 4, the cold air recoverer 21 includes a cold air outlet chamber 23 and a cold air outlet 22, and the plurality of exhaust passages 20 are each communicated with the cold air outlet chamber 23, and the cold air is discharged from the cold air outlet 22.
The working principle of the invention is shown in fig. 1, and specifically comprises the following steps: the same gas source fluid with the same total pressure as the main jet flow enters the micro jet flow inlet cavity 1 from the inlet pipe 17 and the micro jet flow inlet pipe 13 and then enters the micro jet flow nozzle flow channel 2, then the micro jet flow enters the branch flow channel 4 through the pressure signal switching of the sound wave control pipes 3 on the two sides, and the micro jet flow becomes an excitation source of the main jet flow; main efflux is from inlet tube 17 and main efflux inlet tube 16 through main efflux entrance chamber 5 entering main efflux nozzle runner 6, then gets into oscillation chamber 8 through efflux control mouth 7, and efflux control mouth is located 8 front ends of oscillator, main efflux nozzle runner 6 end, and the little efflux that efflux control mouth 7 jetted into pushes and pulls to main efflux, makes main efflux take place the oscillation, then gets into many pipe runners 9 from oscillation chamber 8. The acute-angle splitting structure at the front end of the multi-pipe branched flow channel 9 can ensure that all jet flows attached to the wall flow into the aligned flow channel. The oscillation jet flow generator corresponds to jet flow attached walls on two sides, 5 branched flow channels extend out, the flow channels are symmetrically divided by 10-50 degrees at the backward extending positions of the 5 flow channels in front of the receiving pipe 11 respectively, the flow channels are led into a cold air recoverer 21 through an exhaust channel 20 formed by 45 degrees in a downward inclining mode, and jet air in the pipe flows from the exhaust channel 20 to a cold air outlet cavity 23 with relatively low pressure to be collected under the action of high pressure of rear-section retained air, and then flows out from a cold air outlet 22.
High-pressure gas simultaneously enters the flow channel 19 from the micro-jet inlet cavity 1 and the main-jet inlet cavity 5, the micro-jet flows in the acoustic wave type wall-attached oscillator, fluid entrainment can occur at the pipe orifice of the acoustic wave control pipe 3, and pressure difference is formed at openings on two sides of the pipe orifice of the acoustic wave control pipe 3. The main jet flow is periodically subjected to wall attachment switching under the action of pressure difference, and the jet flow can alternately enter the two flow channels.
The outlets of the two channels facing the oscillation jet flow generator are jet flow control ports 7, and injected micro jet flow pushes and pulls the main jet flow to enable the main jet flow to oscillate and enter the multi-pipe branched channel 9. The oscillation jet flow generator corresponds to jet flow attaching walls on two sides, 5 branched flow channels extend out, the backward extending positions of the 5 flow channels are provided with corresponding 5 receiving tubes 11, the tail ends of the receiving tubes correspond to the air wave tubes, pulse jet flow is incident into the air wave tubes periodically, each pulse jet flow compresses the original gas in the tubes, a contact surface is formed between the two gases, a series of compression waves are generated in front of the contact surface, and the compression waves are converged into shock waves to move forwards due to the continuous increase of the local sound velocity. The shock wave sweeps out the stroke, the gas pressure and temperature jump, namely the jet flow transfers the energy to the detained gas in the pipe by means of wave system through rapid compression and is emitted to the environment through the pipe wall. When the pulse air injection stops, the pipe orifice can generate a beam of expansion waves to move forwards, the jet air after sweeping the contact surface is reduced, parameters such as temperature and pressure of the jet air are reduced, then, the jet air in the pipe is obliquely downwards provided with an exhaust port 10 at an angle of 45 degrees from the lower end of the position of the multi-pipe branched flow channel 9 at the front end of the receiving pipe 11 under the action of higher pressure of stagnant air in the rear section, flows to a cold air outlet cavity 23 with relatively lower pressure through an exhaust channel 20 to be collected, and then flows out from a cold air outlet 22 to finish refrigeration.
Claims (5)
1. The self-excitation micro-jet control multi-tube oscillator is characterized by comprising an oscillation machine body (18) and a cold air recoverer (21);
the oscillating machine body (18) comprises a bottom plate, an upper cover (12), a micro-jet inlet pipe (13), an elbow (14), a tee joint (15), a main jet inlet pipe (16), an inlet pipe (17), a pipe fixing device (24) and a receiving pipe (11); the upper surface of the bottom plate is provided with different cavities and runners, the runners (19) of the oscillating machine body (18) are formed after being communicated with each other, the runners (19) are of a bilateral symmetry structure and comprise a micro-jet inlet cavity (1), a micro-jet nozzle runner (2), a sound wave control tube (3), a bifurcation runner (4), a main jet inlet cavity (5), a main jet nozzle runner (6), a jet control port (7), an oscillating cavity (8), a multi-pipe bifurcation runner (9), an exhaust port (10) and an exhaust channel (20); the sound wave control tube (3) is positioned at the front end of the oscillating machine body (18) and is encircled into a square ring-shaped flow channel, the micro-jet inlet cavity (1) and the micro-jet nozzle flow channel (2) are positioned in a square ring encircled by the sound wave control tube (3), one end of the micro-jet nozzle flow channel (2) is communicated with the micro-jet inlet cavity (1), and the other end of the micro-jet nozzle flow channel is communicated with the middle position of one edge of the sound wave control tube (3); the forked flow channel (4) is of a bilaterally symmetrical structure and is enclosed into a drop-shaped annular flow channel, the left part and the right part respectively comprise a straight line section and a bent section, the straight line section and the bent section are communicated end to end, the outer side ends of the two straight line sections are intersected at the middle position of one edge of the sound wave control tube (3), so that the forked flow channel (4) is communicated with the micro-jet inlet cavity (1) and the micro-jet nozzle flow channel (2), and the outer side ends of the bent section are intersected at the jet control port (7); the main jet inlet cavity (5) and the main jet nozzle flow channel (6) are positioned in a drop-shaped ring enclosed by the forked flow channel (4), one end of the main jet nozzle flow channel (6) is communicated with the main jet inlet cavity (5), and the other end of the main jet nozzle flow channel is communicated with the jet control port (7); the oscillation cavity (8) and the multi-pipe bifurcation flow channel (9) are positioned at the rear end of the oscillation machine body (18), one end of the oscillation cavity (8) is communicated with the jet flow control port (7), and the other end of the oscillation cavity is communicated with the front end of the multi-pipe bifurcation flow channel (9); the tail part of the oscillating machine body (18) is provided with a plurality of exhaust ports (10), and the exhaust ports (10) are respectively communicated with each branch at the rear end of the multi-pipe branch flow passage (9); the receiving pipe (11) is arranged on the exhaust port (10) from the outer side of the tail part of the oscillating machine body (18) and is fixed through a pipe fixing device (24);
the upper cover (12) covers the bottom plate, two through holes are formed in the upper cover (12) and respectively correspond to the micro-jet inlet cavity (1) and the main-jet inlet cavity (5), a micro-jet inlet pipe (13) and a main-jet inlet pipe (16) are respectively installed on the through holes, the micro-jet inlet pipe (13) is communicated with the micro-jet inlet cavity (1), and the main-jet inlet pipe (16) is communicated with the main-jet inlet cavity (5); the inlet pipe (17) is arranged outside the upper cover (12), and the inlet pipe (17) is communicated with the micro-jet inlet pipe (13) and the main jet inlet pipe (16) through an elbow (14) and a tee joint (15);
the tail part of the bottom plate is provided with a plurality of inclined exhaust channels (20) which penetrate through the bottom of the bottom plate, the exhaust channels (20) correspond to the exhaust ports (10), and the exhaust channels and the exhaust ports are communicated with each other;
the cold air recoverer (21) is arranged at the bottom of the tail end of the oscillating machine body (18) and comprises a cold air outlet cavity (23) and a cold air outlet (22), and the cold air outlet cavity (23) is communicated with the cold air outlet (22); the plurality of exhaust channels (20) are communicated with a cold air outlet cavity (23), and cold air is exhausted from a cold air outlet (22);
the bottom plate, the upper cover (12) and the cold air recoverer (21) are fixed through bolts (25).
2. The self-excited microjet control multi-tube oscillator according to claim 1, wherein the inclination angle of the exhaust channel (20) is 45 °, and the angle between each bifurcation of the multi-tube bifurcated flow passage (9) is 10 ° to 50 °.
3. The self-excited microjet control multitube oscillator according to claim 1 or 2, wherein the material of the oscillating body (18) is an acrylic plate or a metal, processed by laser cutting, and slowly transits to a circular section at the position of the rectangular section of the oscillating jet outlet.
4. A self-exciting microjet control multi-tube oscillator according to claim 1 or 2, characterised in that the length of the terminal extension of the receiving tube (11) is determined by the actual requirements, with a pipe joint for external connection.
5. A self-exciting microjet control multi-tube oscillator according to claim 3, characterised in that the length of the terminal extension of the receiving tube (11) is determined by the actual requirements, with a pipe joint for external connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010235690.4A CN111306828B (en) | 2020-03-30 | Self-exciting micro-jet controlled multitube oscillator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010235690.4A CN111306828B (en) | 2020-03-30 | Self-exciting micro-jet controlled multitube oscillator |
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| Publication Number | Publication Date |
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| CN111306828A true CN111306828A (en) | 2020-06-19 |
| CN111306828B CN111306828B (en) | 2024-07-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113019789A (en) * | 2021-03-19 | 2021-06-25 | 大连理工大学 | Wall-separating type feedback jet oscillator |
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| CN1563856A (en) * | 2004-03-12 | 2005-01-12 | 大连理工大学 | Multi-tube jetting oscillating refrigerator and its refrigeration method |
| CN101097167A (en) * | 2005-12-30 | 2008-01-02 | 大连理工大学 | Multifunctional gas wave refrigerating jet stream field displaying apparatus and method for measuring |
| CN101294750A (en) * | 2008-05-23 | 2008-10-29 | 大连理工大学 | Feedback type oscillating jet stream refrigerating machine |
| US20110023624A1 (en) * | 2009-07-24 | 2011-02-03 | Endress + Hauser Flowtec Ag | Vibration-type measuring transducer as well as measuring device with such a measuring transducer |
| DE102010010790A1 (en) * | 2010-03-09 | 2011-09-15 | Universität Stuttgart | Fluidic oscillator for use in aircraft, has flow guide oscillating deflection of fluid upcoming from inlet opening to flow channels, and additional flow channel arranged for formation of reciprocating fluid flow at flow channels |
| CN104315740A (en) * | 2014-09-22 | 2015-01-28 | 大连理工大学 | External-excitation multi-stage oscillation jet flow gas wave refrigerator |
| DE202017106307U1 (en) * | 2017-10-18 | 2017-11-24 | Sonett Vermögensverwaltung Gmbh | Oscillator device for mixing liquids |
| CN212006287U (en) * | 2020-03-30 | 2020-11-24 | 大连大学 | Self-excited micro-jet control multi-tube oscillator |
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| CN113019789A (en) * | 2021-03-19 | 2021-06-25 | 大连理工大学 | Wall-separating type feedback jet oscillator |
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