CN206386315U - A kind of supersonic gas injector of the tangential tonifying Qi of mixing chamber - Google Patents
A kind of supersonic gas injector of the tangential tonifying Qi of mixing chamber Download PDFInfo
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- CN206386315U CN206386315U CN201621293086.2U CN201621293086U CN206386315U CN 206386315 U CN206386315 U CN 206386315U CN 201621293086 U CN201621293086 U CN 201621293086U CN 206386315 U CN206386315 U CN 206386315U
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- injector
- mixing chamber
- tonifying
- gas
- mixing
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Abstract
A kind of supersonic gas injector of the tangential tonifying Qi of mixing chamber, described injector mixes diffuser 6, the first mixing chamber 7, injection gas jets 8, injector nozzle support plate 9, the mixing diffuser of end cap 10, second support plate 11 by injection gas entrance 1, outer wall 2, by injection gas entrance 3, the first mixing chamber support plate 4, tonifying Qi gas entrance 5, second and constituted.Tangential tonifying Qi is internally formed pneumatic venturi via the first mixing chamber and the tonifying Qi nozzle of the second mixing diffuser formation in the second mixing diffuser, reduce the minimum starting pressure of injector, and injection working medium flow can be saved in the case of having by ejection gas (load), so as to ensure that injector is reliably started and with higher ejector capacity.
Description
Technical field
The utility model is related to a kind of device that vacuum and fluid conveying are obtained using gas as injection working medium.
Background technology
Supersonic gas injector is a kind of fluid delivery system, and it flows through superonic flow nozzzle by gases at high pressure (steam)
The high velocity stream volume formed afterwards inhales another low-pressure fluid, and carries out energy exchange and material blending in a device, reaches extraction
Vacuum or the purpose for conveying low-pressure fluid.Ejection gas self-energy is only consumed without outer using supersonic gas injector
Plus power, its is simple in construction, easy to manufacture, easy to connect with pipeline, and some gases (such as steam) can subsequently set
Standby middle condensation is reclaimed, and is recycled, therefore supersonic gas injector is widely used in vacuum environment and obtains field.
Generally, supersonic gas injector workflow can be divided into three phases：Injector itself starts (supply injection
Gas), normal operating conditions (supply by injection gas-holding specify when it is m- stop supply by injection gas), stop supply injection gas
The starting of (closing injector), wherein injector itself is the necessary stage of supersonic gas injector normal work.According to gas
Dynamics correlation theory, the mark that supersonic gas injector itself is started is that normal shock wave releases supersonic speed diffusion by ejection gas
Device is exported.Therefore, after the determination of injector physical dimension, it is desirable to which the stagnation pressure of ejection gas necessarily be greater than minimum starting pressure,
Normal shock wave can be released diffuser, it is ensured that main flow is velocity of sound or supersonic speed in diffuser.Due to drawing for supersonic gas injector
Body of emanating accelerates to supersonic speed by Laval nozzle, therefore, and the minimum discharge of ejection gas is proportional to minimum starting pressure, draws
The mass ratio of induced-to-inducing air height of emitter is also limited to minimum starting pressure.
The supersonic gas injector of fixed structure can only can be only achieved normal operating efficiency, injection under design conditions
The regulation excursion very little of gas pressure, flow, it is necessary to could normal work, otherwise supersonic gas in certain scope
The operating efficiency of injector will be reduced greatly, or even can not be worked.Therefore, supersonic gas injector (is mainly steam
Jet pump) designer makes every effort to nozzle location, the cross-section area of nozzle is adjusted according to actual condition.Such as Chinese patent
CN201827162U, CN203670313U propose the adjustable steam jet pump of nozzle location, according to the pressure of working steam, temperature
The change of degree, flow etc., adjusts nozzle location manually, to ensure that jet pump works in Best Point, realizes system under variable working condition
Stable operation.Chinese patent CN101876329B proposes a kind of injection pump with variable nozzle, by rotation hand wheel or passes through
The flow signal control automatic executing agency of collection high-velocity fluid realizes the adjustability of jet pump nozzle.Chinese patent
CN102748330A proposes a kind of Multi-nozzle steam jet type heat pump and operating method, is acted on by multiinjector group, improves spray
Coefficient is penetrated, stable mixed vapour pressure is reached, reducing can not be produced by the use of the relatively low steam of pressure as driving steam
Energy waste.But the above method fails fundamentally to solve the minimum starting pressure of supersonic gas injector of fixed structure
Unadjustable the problem of.
The content of the invention
Technology of the present utility model solves problem：Supersonic gas injector start-up period requires that the stagnation pressure of ejection gas must
Must be higher than minimum starting pressure, the high pressure injection gas flow needed for causing the injector start-up period of geometry fixation is long-range
Flow needed for having under loading condition, so as to cause mass ratio of induced-to-inducing air low and the waste of high pressure injection working medium.Further, since injector
And the design of injection working medium supply system is often based upon experience, therefore, if injection working medium deliverability allowance is not enough, it may make
It can not be started into injector, it is necessary to which injection working medium supply system (such as boiler, gas cylinder) is transformed or in design rank
Allowance larger Duan Caiyong, this also leads to equipment scale increase, the gases at high pressure wasting of resources.Supersonic inlets are taken tangentially to mend
It is to solve one of best mode of injector low-pressure starting that gas, which carries out active fluid control,.
Technical solution of the present utility model：
Technical solution of the present utility model is the injection gas jets and supersonic speed diffusion in supersonic gas injector
Increase a mixing chamber and tonifying Qi collection chamber between device, and cut using newly-increased mixing chamber outer wall with former supersonic diffuser formation
To tonifying Qi nozzle, for accelerating and adjusting flow of air supply and flow direction.Tonifying Qi gas forms gas in former supersonic diffuser
Dynamic venturi, its sectional area is less than former supersonic diffuser sectional area, so as to reduce the minimum starting pressure of injector, and can have by
The pneumatic throat size of automatic adjusument, saving ejection gas flow in the case of ejection gas (load), so as to ensure that injector can
By starting and with higher mass ratio of induced-to-inducing air.
The advantage of the utility model compared with prior art is as follows：
(1) in the case of injector geometry is constant, it can realize that injector normally rises using ejection gas at low pressure
It is dynamic, so as to reduce high pressure injection gas consumption, mass ratio of induced-to-inducing air is improved, the economy of injector operation is improved；
(2), can be using large area than ejection gas nozzle simultaneously in the case of injection source of the gas parameter and gas consumption are constant
Ensure that injector is started, so as to greatly improve injector compression ratio and mass ratio of induced-to-inducing air.
Brief description of the drawings
The supersonic gas ejector structure schematic diagram of the tangential tonifying Qi of Fig. 1 mixing chambers
The tangential tonifying Qi of Fig. 2 fluidal texture schematic diagram in supersonic diffuser
The supersonic gas injector of the tangential tonifying Qi of Fig. 3 and traditional single stage injector performance comparison
The supersonic gas injector of the tangential tonifying Qi of Fig. 4 and traditional two-stage injector performance comparison
Embodiment
The utility model is related to a kind of supersonic gas injector of the tangential tonifying Qi of mixing chamber, it is characterised in that injector by
Injection gas entrance 1, outer wall 2, by injection gas entrance 3, the first mixing chamber support plate 4, tonifying Qi gas entrance 5, second mix diffuser 6,
First mixing chamber 7, injection gas jets 8, injector nozzle support plate 9, the mixing diffuser of end cap 10, second support plate 11 are constituted.
Injection gas entrance 1 is injector and external high pressure gas piping connecting interface, using screw thread or flange and outside
Gas piping is connected, and entrance pipe circulation area is more than 4 times of the throat area of injector nozzle 8.Injection gas entrance and outer wall 2
It is welded to connect.
Outer wall 2 is for packing the internal each part of support, and the cavity of formation difference in functionality therewith.Outer wall 2 uses tubing
Processing or sheet material are rolled.
By the connecting interface that injection gas entrance 3 is injector and external loading, using screw thread or flange and external loading
Pipeline is connected, and injection gas entrance is welded to connect with outer wall 2.
First mixing chamber support plate 4 be used for support the first mixing chamber 5, and with the first mixing chamber 5, outer wall 2, injection gas jets 8,
Injection gas jets support plate 9 is constituted is entered the room by injection aspiration.
Tonifying Qi entrance 5 is the connecting interface of tonifying Qi source of the gas and injector, is connected using screw thread or flange with tonifying Qi source of the gas.
Tonifying Qi entrance 5 is welded to connect with outer wall 2.
Second mixing diffuser 6 is supersonic diffuser, and type can be uiform section type, uiform section expanding, secondary venturi
Type, diffuser exit connection air or upstream device.
First mixing chamber 7 is the uiform section diffuser arrangement with tentatively being mixed by ejection gas by ejection gas.
Injection gas jets 8 is receive the Laval nozzle of expansion type, for injection gas to be accelerated into specified Mach number.
Injection gas jets support plate 9 is used to support injection gas jets 8, and with injection gas jets 8, outer wall 2, end cap 10, injection
The grade of gas entrance 1 constitutes injection gas gas collection surge chamber.
End cap 10 is the building block of injection gas gas collection cushion chamber, and welding or flange are connected between outer wall 2.
Second mixing diffuser support plate 11 is the support of the second mixing diffuser 6, and mixes diffuser 6, outer wall with second
2nd, the first mixing chamber 7, the first mixing chamber support plate 4 constitute tonifying Qi gas collection surge chamber.
The supersonic ejector workflow of mixing chamber tonifying Qi is as follows.
Injector is started：Tonifying Qi entrance 5 is first turned on, room pressure is buffered to tonifying Qi gas collection and interior is entered by injection aspiration
Pressure respectively reaches setting value (calculated and determined by design) and keeps stable；Secondly, injection gas entrance 1 is opened, to injection gas collection
In gas surge chamber and enter room pressure by injection aspiration to reach setting value (calculated and determined by design) and keep stable, now, draw
Emitter is started successfully.
Injector normal work：Open by injection gas entrance 3, keep upstream by injection gas stable supplying, injector enters
Normal operating conditions.
Injector shuts down：It is first shut off by injection gas entrance 3, setting value is returned to room pressure is entered by injection aspiration；
Secondly injector entrance 1 is closed, setting value is returned to room pressure is entered by injection aspiration；Finally, tonifying Qi entrance 5 is closed, is drawn
Emitter is stopped.
Injector working effect：For checking gas compensating type gas ejector performance, the conventional list of applicant Experimental Comparison first
Level injector and gas compensating type injector performance (Fig. 3).Result of the test shows, in mass ratio of induced-to-inducing air n=0, gas compensating type injector
Compression ratio ε is 4.2 times of conventional single stage injector compression ratio ε.In the range of mass ratio of induced-to-inducing air n=0~0.1, gas compensating type injector
The more conventional single stage ejector compression ratio ε of compression ratio ε are high (curve Isosorbide-5-Nitrae), but operating pressure Π requirement is lower (curve 2).Its
It is secondary, applicant's Experimental Comparison conventional two-stage injector and gas compensating type injector performance (Fig. 4).Result of the test shows, in injection
During coefficient n=0, compression ratio ε=45 of conventional two-stage injector, and gas compensating type injector compression ratio ε=115, improve 1.6
Times.In mass ratio of induced-to-inducing air n≤0.08, the more conventional two-stage injector compression ratio of gas compensating type injector compression ratio is high (curve 1,2),
But operating pressure Π requirement is lower (curve 3).
Claims (5)
1. a kind of supersonic gas injector of the tangential tonifying Qi of mixing chamber, it is characterised in that injector is by injection gas entrance (1), outer
Wall (2), by injection gas entrance (3), the first mixing chamber support plate (4), tonifying Qi gas entrance (5), second mixing diffuser (6), first
Mixing chamber (7), injection gas jets (8), injector nozzle support plate (9), end cap (10), second mixing diffuser support plate (11) group
Into.
2. the supersonic gas injector of the tangential tonifying Qi of mixing chamber according to claim 1, it is characterized in that：Injection gas jets
(8) to receive expansion type nozzle, nozzle inner mold face connects for multi-section circular arc curve to be formed, and converging portion convergency size is 20~30 °, is expanded
It is 4~8 ° to open section angle of flare size.
3. the supersonic gas injector of the tangential tonifying Qi of mixing chamber according to claim 1, it is characterized in that：First mixing chamber
(7) it is uiform section type mixing diffuser；Mixing chamber diameter is calculated by pneumatic function or tested and obtains, and mixing chamber draw ratio scope is
6~8.
4. the supersonic gas injector of the tangential tonifying Qi of mixing chamber according to claim 1, it is characterized in that：Second mixing is expanded
Gap between depressor (6) and the first mixing chamber (7) constitutes tonifying Qi gas jets, for controlling tonifying Qi throughput and flow direction.
5. the supersonic gas injector of the tangential tonifying Qi of mixing chamber according to claim 1, it is characterized in that：Second mixing is expanded
Depressor form can be uiform section type, uiform section expanding, secondary venturi type diffuser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621293086.2U CN206386315U (en) | 2016-11-29 | 2016-11-29 | A kind of supersonic gas injector of the tangential tonifying Qi of mixing chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621293086.2U CN206386315U (en) | 2016-11-29 | 2016-11-29 | A kind of supersonic gas injector of the tangential tonifying Qi of mixing chamber |
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| Publication Number | Publication Date |
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| CN206386315U true CN206386315U (en) | 2017-08-08 |
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| CN201621293086.2U Active CN206386315U (en) | 2016-11-29 | 2016-11-29 | A kind of supersonic gas injector of the tangential tonifying Qi of mixing chamber |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108131336A (en) * | 2016-11-29 | 2018-06-08 | 北京航天试验技术研究所 | A kind of supersonic gas injector of the tangential tonifying Qi of mixing chamber |
| CN108443239A (en) * | 2018-04-11 | 2018-08-24 | 大连理工大学 | A kind of multifunctional static induction apparatus |
-
2016
- 2016-11-29 CN CN201621293086.2U patent/CN206386315U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108131336A (en) * | 2016-11-29 | 2018-06-08 | 北京航天试验技术研究所 | A kind of supersonic gas injector of the tangential tonifying Qi of mixing chamber |
| CN108443239A (en) * | 2018-04-11 | 2018-08-24 | 大连理工大学 | A kind of multifunctional static induction apparatus |
| CN108443239B (en) * | 2018-04-11 | 2023-10-31 | 大连理工大学 | Multifunctional static injection device |
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