CN1987123A - Device for improving liquid flow pump cavitation property - Google Patents
Device for improving liquid flow pump cavitation property Download PDFInfo
- Publication number
- CN1987123A CN1987123A CN 200610166505 CN200610166505A CN1987123A CN 1987123 A CN1987123 A CN 1987123A CN 200610166505 CN200610166505 CN 200610166505 CN 200610166505 A CN200610166505 A CN 200610166505A CN 1987123 A CN1987123 A CN 1987123A
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- China
- Prior art keywords
- trunnion
- pipe
- pressure
- pressure inlet
- jet injector
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000007788 liquid Substances 0.000 title claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 30
- 229940090046 jet injector Drugs 0.000 claims description 43
- 230000008901 benefit Effects 0.000 abstract description 5
- 238000009792 diffusion process Methods 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 6
- 239000011259 mixed solution Substances 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 239000003643 water by type Substances 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 238000002309 gasification Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000005514 two-phase flow Effects 0.000 description 2
- 241001672694 Citrus reticulata Species 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
Images
Landscapes
- Jet Pumps And Other Pumps (AREA)
Abstract
本发明公开了一种改善液体射流泵汽蚀性能的装置，涉及一种液体射流泵装置。本发明包括常规的液体射流泵，由工作水接管(1)、吸入室(2)、吸水管(3)、喷嘴(4)、喉管入口管(5)、喉管(6)、扩散管(7)、出水管(8)组成；在喉管(6)的末端部位设置有增压管(9)，在增压管(9)上设置有阀门(10)；增压管(9)的另一端或连接射流泵的出水管(8)，或连接射流泵的工作水接管(1)，或连接外来高压水源。本发明结构简单，成本低廉，工作可靠，有效改善了液体射流泵的汽蚀性能，由于性能价格比高，可广泛应用于各类液体射流泵之中。
The invention discloses a device for improving the cavitation performance of a liquid jet pump, and relates to a liquid jet pump device. The present invention comprises conventional liquid jet pump, is connected by working water (1), suction chamber (2), suction pipe (3), nozzle (4), throat pipe inlet pipe (5), throat pipe (6), diffusion pipe (7), water outlet pipe (8) composition; The end position of throat pipe (6) is provided with booster pipe (9), is provided with valve (10) on booster pipe (9); Booster pipe (9) The other end of the other end is connected to the outlet pipe (8) of the jet pump, or connected to the working water connection (1) of the jet pump, or connected to an external high-pressure water source. The invention has the advantages of simple structure, low cost and reliable operation, effectively improves the cavitation performance of the liquid jet pump, and can be widely used in various liquid jet pumps due to the high performance-price ratio.
Description
Technical field
The present invention relates to a kind of liquid jet pump-unit, relate in particular to a kind of device that improves liquid flow pump cavitation property.
Background technique
Liquid-jet pump is fluid conveying machine and the mix reaction equipment that a kind of turbulent fluctuation diffusion of utilizing rapid jet is transmitted energy and quality.
As Fig. 1, the typical structure of conventional liq Jet injector comprises working water adapter 1, suction chamber 2, suction sleeve 3, nozzle 4, trunnion inlet duct 5, trunnion 6, diffusing tube 7 and outlet pipe 8.
Owing to itself do not have moving element, that Jet injector has is simple in structure, easy processing, good airproof performance, be convenient to advantage such as maintenance, now has been widely used in national economy all departments.Especially under water, radiation, special occasions such as inflammable, explosive, Jet injector has special advantages, can produce huge economic benefit.
The cavitation problem of liquid-jet pump is one of important topic of Jet injector research.The cavitation of liquid-jet pump is different from other type of pump.Jet injector can not stop when cavitation took place, but under certain working pressure, along with the reduction of outlet pressure, the inhalation flow of Jet injector no longer increases, and remains on the certain value.When cavitation took place, Jet injector can produce strong noise and vibration, causes the rapid reduction of Jet injector and system effectiveness, even can have a strong impact on the safety and the economical operation of whole system.
Specifically, during the liquid jet pump work, because the reduction meeting of local compression at first forms micro gasification in the pump near jet expansion and in the jet boundary layer in the trunnion.Micro gasification is crumbled and fall in trunnion front end to central region with the main flow direction downstream flow.When the Jet injector outlet pressure reduces, steam bubble quantity showed increased forms the basicly stable cavitation cloud (steam bubble group) of shape, along with the further reduction of outlet pressure, near the expansion trunnion outlet of cavitation cloud, and form the well-proportioned foam-like vapour-liquid two-phase flow of mixing.When the Jet injector cavitation took place, this foam flow developed into the foam critical flow, and the flow velocity of mixed solution reaches velocity of sound, thereby block liquid flowing in trunnion, thereby the Jet injector outlet pressure is when further descending, and its inhalation flow no longer increases, but remains on the certain value.At this moment, steam bubble is crumbled and fall in a large number at the trunnion end, thereby produces violent vibration and noise.
In order to solve the cavitation problem of Jet injector, forefathers have carried out a lot of researchs.The method that solves is concluded and is mainly at present:
(1) depth of immersion of increase Jet injector;
(2) the area ratio of increase Jet injector;
(3) working pressure of reduction Jet injector;
(4) optimize the shape that Jet injector nozzle and trunnion enter the mouth, improve the condition that becomes a mandarin.
Wherein method (1) can increase engineering cost greatly; Method (2) and (3) then can make Jet injector depart from optimum operating condition work, reduce its performance and efficient; What method (4) was improved is limited in scope.In a word, said method can improve the cavitation performance of Jet injector to a certain extent, but does not tackle the problem at its root.
Summary of the invention
Purpose of the present invention just is to overcome the shortcoming and defect that prior art exists, and a kind of device that improves liquid flow pump cavitation property is provided.
The object of the present invention is achieved like this:
By to the test of jet pumping pressure along Cheng Bianhua, when finding that cavitation takes place, maximum negative pressure and axial pressure gradient appear in the terminal steam bubble of the Jet injector trunnion place that crumbles and fall.Theory analysis and test data show, the existence of this negative pressure and pressure gradient just causes this place's flow velocity to reach velocity of sound, thereby block liquid flowing in trunnion causes the rate of discharge of Jet injector no longer to increase with the reduction of outlet pressure.If increase the pressure at this place, just can reduce the size of its axial pressure gradient, reduce the flow velocity of mixed solution, thereby delay the generation of cavitation, reduce vibration and noise simultaneously.
Therefore, according to above-mentioned achievement in research, we connect the moderate water pipe of a diameter (pressure inlet) in Jet injector trunnion distal portion, on this pipe valve are housed.The other end of pressure inlet links to each other with the high pressure water side.High pressure water can from the Jet injector outlet pipe or working water be taken over or other high-pressure water.When proper functioning, close valve on the pressure inlet, Jet injector is worked as conventional Jet injector.When cavitation takes place, can open valve on the pressure inlet, by the aperture of regulating valve, the high pressure water that flow is moderate is guided to the trunnion end, improves the pressure of the terminal fluid of trunnion, reduces the flow velocity of vapour-liquid mixed solution, this moment, the noise and the vibration of Jet injector obviously reduced, thereby delayed the generation of cavitation.Experimental study shows, according to the Jet injector area than and pressure inlet diameter different, this device can be a kind of simple and feasible new equipment that improves the Jet injector cavitation performance with the operating range expansion 5～30% of Jet injector.
Specifically, the present invention includes working water adapter 1, suction chamber 2, suction sleeve 3, nozzle 4, trunnion inlet duct 5, trunnion 6, diffusing tube 7 and outlet pipe 8; Working water adapter 1, nozzle 4 link to each other and are installed in the suction chamber 2; Suction chamber 2 is connected with suction sleeve 3, and suction chamber 2, trunnion inlet duct 5, trunnion 6, diffusing tube 7, outlet pipe 8 connect successively; Trunnion 6 distal portion at existing liquid jet pump-unit are provided with pressure inlet 9, and pressure inlet 9 is provided with valve 10.
Working principle of the present invention is: by pressure inlet 9 pressure that the terminal steam bubble of trunnion is crumbled and fall when the high pressure side diversion improves cavitation and takes place, reduce the size of this place's axial pressure gradient, reduce the flow velocity of this place's foam-like vapour-liquid two-phase flow, thereby delay the generation of cavitation.
The present invention and conventional Jet injector difference are that the distal portion of trunnion 6 is provided with pressure inlet 9, by pressure inlet 9 high pressure water are caused trunnion 6 ends, valve 10 is housed on the pressure inlet 9 comes control flows to the pressure of the high pressure water of trunnion 6 ends and the size of flow.
During proper functioning, valve 10 is closed, cut off the high pressure water yield of pressure inlet 9 to trunnion 6 ends.
Produce violent vibration and noise in case find Jet injector, promptly know Jet injector generation cavitation, can open valve 10,, just can significantly reduce the vibration and the noise of Jet injector, delay the generation of cavitation, thereby widened the operating range of Jet injector by regulating its aperture.
The present invention has following advantage and good effect:
1, simple in structure, with low cost, only on the basis of conventional Jet injector, increased pressure inlet 9 and valve 10;
2, reliable operation has effectively been improved the cavitation performance of liquid-jet pump, and the operating range of Jet injector is expanded 5～30%, and the vibration and the noise that are produced can significantly reduce Jet injector generation cavitation the time.
3, owing to the price performance height, can be widely used among all kinds of liquid-jet pumps.
Description of drawings
Fig. 1 is the structural drawing of conventional Jet injector;
Fig. 2 is the specific embodiment of the invention 1 figure.
Fig. 3 is the specific embodiment of the invention 2 figure.
Fig. 4 is the specific embodiment of the invention 3 figure.
Wherein:
The 1-working water is taken over; The 2-suction chamber; The 3-suction sleeve;
The 4-nozzle; 5-trunnion inlet duct; The 6-trunnion;
The 7-diffusing tube; The 8-outlet pipe; The 9-pressure inlet;
The 10-valve.
Embodiment
1. pressure inlet 9 required high pressure waters are introduced from outlet pipe 8
As Fig. 2, pressure inlet 9 links to each other trunnion 6 distal portion with the outlet pipe 8 of Jet injector, the size that valve 10 is controlled the pressure and the flow of the capacity of reflux of 6 ends from Jet injector outlet pipe 8 to trunnion is housed on the pressure inlet 9.
2. pressure inlet 9 required high pressure waters are taken over 1 introducing from working water
As Fig. 3, pressure inlet 9 is taken over 1 with trunnion 6 distal portion with the working water of Jet injector and is linked to each other, and valve 10 is housed on the pressure inlet 9 controls from the adapter 1 of Jet injector working water to the pressure of the high pressure water flow of trunnion 6 ends and the size of flow.
3. pressure inlet 9 required high pressure waters are introduced from other high-pressure water
As Fig. 4, pressure inlet 9 links to each other trunnion 6 distal portion with other high-pressure water, valve 10 is housed on the pressure inlet 9 controls the pressure of high pressure water flow of 6 ends from the high-pressure water to the trunnion and the size of flow.
Claims (4)
1, a kind of device that improves liquid flow pump cavitation property, comprise conventional liquid-jet pump, form by working water adapter (1), suction chamber (2), suction sleeve (3), nozzle (4), trunnion inlet duct (5), trunnion (6), diffusing tube (7), outlet pipe (8); Working water adapter (1), nozzle (4) link to each other and are installed in the suction chamber (2); Suction chamber (2) is connected with suction sleeve (3), and suction chamber (2), trunnion inlet duct (5), trunnion (6), diffusing tube (7), outlet pipe (8) connect successively;
It is characterized in that: be provided with pressure inlet (9) in trunnion (6) distal portion, pressure inlet (9) is provided with valve (10).
2, by the described a kind of device that improves liquid flow pump cavitation property of claim 1, it is characterized in that:
One end of pressure inlet (9) connects trunnion (6) distal portion, and the other end of pressure inlet (9) connects the outlet pipe (8) of Jet injector.
3, by the described a kind of device that improves liquid flow pump cavitation property of claim 1, it is characterized in that:
One end of pressure inlet (9) connects trunnion (6) distal portion, and the other end of pressure inlet (9) connects the working water of Jet injector and takes over (1).
4, by the described a kind of device that improves liquid flow pump cavitation property of claim 1, it is characterized in that:
One end of pressure inlet (9) connects trunnion (6) distal portion, and the other end of pressure inlet (9) connects external high-pressure water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101665050A CN100564893C (en) | 2006-12-27 | 2006-12-27 | A kind of device that improves liquid flow pump cavitation property |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101665050A CN100564893C (en) | 2006-12-27 | 2006-12-27 | A kind of device that improves liquid flow pump cavitation property |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1987123A true CN1987123A (en) | 2007-06-27 |
| CN100564893C CN100564893C (en) | 2009-12-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006101665050A Expired - Fee Related CN100564893C (en) | 2006-12-27 | 2006-12-27 | A kind of device that improves liquid flow pump cavitation property |
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| Country | Link |
|---|---|
| CN (1) | CN100564893C (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102297168A (en) * | 2010-06-25 | 2011-12-28 | 青岛高远热能动力设备有限公司 | Fluid transformer |
| CN102900047A (en) * | 2012-10-23 | 2013-01-30 | 武汉大学 | Jet flow ice-melting and ice-crushing machine |
| CN103244468A (en) * | 2013-04-17 | 2013-08-14 | 武汉大学 | Ejecting-type jet flow cavitation generator and cavitation cell disruption device |
| CN105909567A (en) * | 2016-06-15 | 2016-08-31 | 江苏大学 | Jet device capable of improving cavitation performance of jet type centrifugal pump |
| CN106089818A (en) * | 2016-06-16 | 2016-11-09 | 北京工业大学 | A kind of from dynamic auxiliary injection type steam jet ejector |
| CN106224250A (en) * | 2016-10-02 | 2016-12-14 | 浙江新控泵业有限公司 | Strengthen the vortex combination pump of self-priming |
| CN106438512A (en) * | 2016-11-08 | 2017-02-22 | 四川大学 | Ring-symmetry air supplementing device and method for reducing cavitation of liquid jet pump |
| CN108412815A (en) * | 2018-04-09 | 2018-08-17 | 大连申域流体机械有限公司 | Anti- cavitation fore pump |
| CN108518365A (en) * | 2018-02-28 | 2018-09-11 | 中国矿业大学(北京) | The method and jet flow cavitation generator of foam dope amount are precisely controlled using jet flow cavitation principle |
| CN110173471A (en) * | 2019-07-02 | 2019-08-27 | 北京合利能科技有限公司 | A kind of heat supply ballast pump |
| CN113007146A (en) * | 2021-04-16 | 2021-06-22 | 中南大学 | Water pump steam-mixing super-cavitation-preventing and noise-reducing device |
| CN113007153A (en) * | 2021-03-26 | 2021-06-22 | 中国船舶重工集团公司第七一九研究所 | Anti-cavitation jet pump |
| CN113154173A (en) * | 2021-04-16 | 2021-07-23 | 中南大学 | Device for inhibiting pipeline explosion and leakage by mixing steam and supercavitation of reducing water pipe |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US11045777B2 (en) | 2017-09-11 | 2021-06-29 | ClearWater Tech, LLC | Adjustable venturi |
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2006
- 2006-12-27 CN CNB2006101665050A patent/CN100564893C/en not_active Expired - Fee Related
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102297168B (en) * | 2010-06-25 | 2013-12-25 | 青岛高远热能动力设备有限公司 | Fluid transformer |
| CN102297168A (en) * | 2010-06-25 | 2011-12-28 | 青岛高远热能动力设备有限公司 | Fluid transformer |
| CN102900047A (en) * | 2012-10-23 | 2013-01-30 | 武汉大学 | Jet flow ice-melting and ice-crushing machine |
| CN102900047B (en) * | 2012-10-23 | 2016-03-16 | 武汉大学 | A kind of jet ice-melt and ice crusher |
| CN103244468A (en) * | 2013-04-17 | 2013-08-14 | 武汉大学 | Ejecting-type jet flow cavitation generator and cavitation cell disruption device |
| CN103244468B (en) * | 2013-04-17 | 2015-11-04 | 武汉大学 | Injection jet cavitation generator and cavitation cell crushing device |
| CN105909567A (en) * | 2016-06-15 | 2016-08-31 | 江苏大学 | Jet device capable of improving cavitation performance of jet type centrifugal pump |
| CN106089818B (en) * | 2016-06-16 | 2018-02-09 | 北京工业大学 | It is a kind of from dynamic auxiliary injection type steam jet ejector |
| CN106089818A (en) * | 2016-06-16 | 2016-11-09 | 北京工业大学 | A kind of from dynamic auxiliary injection type steam jet ejector |
| CN106224250A (en) * | 2016-10-02 | 2016-12-14 | 浙江新控泵业有限公司 | Strengthen the vortex combination pump of self-priming |
| CN106438512A (en) * | 2016-11-08 | 2017-02-22 | 四川大学 | Ring-symmetry air supplementing device and method for reducing cavitation of liquid jet pump |
| CN108518365A (en) * | 2018-02-28 | 2018-09-11 | 中国矿业大学(北京) | The method and jet flow cavitation generator of foam dope amount are precisely controlled using jet flow cavitation principle |
| CN108518365B (en) * | 2018-02-28 | 2023-11-21 | 中国矿业大学(北京) | Method for precisely controlling foam stock solution by using jet cavitation principle and jet cavitation generator |
| CN108412815A (en) * | 2018-04-09 | 2018-08-17 | 大连申域流体机械有限公司 | Anti- cavitation fore pump |
| CN110173471A (en) * | 2019-07-02 | 2019-08-27 | 北京合利能科技有限公司 | A kind of heat supply ballast pump |
| CN113007153A (en) * | 2021-03-26 | 2021-06-22 | 中国船舶重工集团公司第七一九研究所 | Anti-cavitation jet pump |
| CN113007153B (en) * | 2021-03-26 | 2022-11-08 | 中国船舶重工集团公司第七一九研究所 | Anti-cavitation jet pump |
| CN113007146A (en) * | 2021-04-16 | 2021-06-22 | 中南大学 | Water pump steam-mixing super-cavitation-preventing and noise-reducing device |
| CN113154173A (en) * | 2021-04-16 | 2021-07-23 | 中南大学 | Device for inhibiting pipeline explosion and leakage by mixing steam and supercavitation of reducing water pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100564893C (en) | 2009-12-02 |
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