CN1932380A - Back pressure adaptive constant-flow nozzle - Google Patents
Back pressure adaptive constant-flow nozzle Download PDFInfo
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- CN1932380A CN1932380A CN 200610031176 CN200610031176A CN1932380A CN 1932380 A CN1932380 A CN 1932380A CN 200610031176 CN200610031176 CN 200610031176 CN 200610031176 A CN200610031176 A CN 200610031176A CN 1932380 A CN1932380 A CN 1932380A
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- nozzle
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- sleeve
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Abstract
The present invention relates to a back-pressure adaptive constant-flow nozzle used in the liquid fuel injection system. Its structure is characterized by that it includes the following several portions: nozzle self-body, sleeve, central bar, nozzle outlet, piston, fuel inlet and spring. Said invention also provides the concrete structure of every above-mentioned portion, and provides the connection mode of all the above-mentioned portions.
Description
Technical field
The present invention relates to be used for the nozzle of liquid fuel injection system such as kerosene, diesel oil, gasoline, residual oil, can be applicable to injection system such as the energy, power, heating, Aero-Space propelling.
Background technology
The major function of nozzle is that liquid fuel is introduced the combustion chamber, controls its flow, makes liquid crushing become droplet.When designing nozzle, people only are concerned about its atomization in the past, have developed all kinds nozzle from atomizing type.The several types of widespread usage is at present: single flow nozzle (comprising jet nozzle, tack nozzle, diesel engine nozzle, scallop hole nozzle etc.), rotarytype injector, two-fluid spray nozzle (be divided into gas assist type nozzle and gas and blow the formula nozzle), rotating nozzle and other form nozzle (comprising supersonic nozzle, sound wave nozzle, EFI mouth etc.).
Common feature with top nozzle is, the hypothesis combustion chamber pressure is known and constant during design, and fuel flow rate is by storage tank pressure and orifice size decision.Yet in the real work, combustion chamber pressure does not always equal specified pressure, but within the specific limits fluctuation, particularly system start, the condition of changing a job and when closing, combustion chamber pressure is away from rated value, this moment, the plain nozzle discharge characteristic can't guarantee.
Summary of the invention
The technical problem to be solved in the present invention is, the defective that can't guarantee at prior art nozzle discharge characteristic when the back-pressure offrating, a kind of back pressure adaptive constant-flow nozzle is proposed, it need not external energy and drives, can adapt to back-pressure within the specific limits automatically changes, keep constant flow, and simple in structure, dependable performance.Technical solution of the present invention is, described back pressure adaptive constant-flow nozzle comprises sleeve, its design feature is, be provided with center-pole in the described sleeve, this center-pole rear portion is a cylindrical body and anterior be bullet, the bigger end of described bullet is positioned at jet expansion one side, the front end that is set with the annular space that forms between piston and this piston cavity and the described bullet on the described center-pole is communicated with described jet expansion and its rear end is communicated with passage front end in the described cylindrical body, this passage rear end is a fuel filler, between piston rear end and sleeve rear end spring is housed.
Below the present invention made further specify.
Referring to Fig. 1, the present invention includes sleeve 1, its design feature is, be provided with center-pole 10 in the described sleeve 1, these center-pole 10 rear portions are cylindrical body 4 and anterior be bullet 8, described bullet 8 bigger ends are positioned at jet expansion 9 one sides, the front end that is set with the annular space 7 that forms between piston 2 and this piston 2 inner chambers and the described bullet 8 on the described center-pole 10 is communicated with described jet expansion 9 and its rear end is communicated with passage 6 front ends in the described cylindrical body, these passage 6 rear ends are fuel filler 5, between piston 2 rear ends and sleeve 1 rear end spring 3 are housed.
The know-why of nozzle of the present invention is, liquid fuel enters the passage 6 of center-pole 10 according to Fig. 1 right side arrow direction by fuel filler 5, and the annular space (annulus) 7 that forms between the bullet 8 of piston 2 inner chambers and center-pole 10 again penetrates, and flow G is determined by following formula:
In the formula: C
dBe discharge coefficient; A is an orifice size; ρ is a liquid fuel density; p
0Be liquid fuel head stagnation pressure; P is the outlet back-pressure.
Piston 2, spring 3 assemblies change as sensing element induction back-pressure, by the dynamic balance of spring 3 with back-pressure, by spring 3 elastic compression amounts record back-pressure change amount, to act on simultaneously and directly pass to executing agency's piston 2, the change in location of piston 2 relative adjustment mechanism center-poles 10 causes the two slit to change, be that the nozzle orifice size changes, flow G equals design load all the time in maintenance (1) formula.
As known from the above, the present invention is a kind of back pressure adaptive constant-flow nozzle, it is compared with existing nozzle, need not the external energy driving and can adapt to back-pressure within the specific limits automatically to change, keep constant flow, and simple in structure, dependable performance can be widely used in injection system such as the energy, power, heating, Aero-Space propelling.
Description of drawings
Fig. 1 is the structural representation of an embodiment of the present invention.
In the drawings:
The 1-sleeve, the 2-piston, the 3-spring, the 4-cylindrical body, the 5-fuel filler,
The 6-passage, 7-annular space, 8-bullet, 9-jet expansion, 10-center-pole.
The specific embodiment
According to the back pressure adaptive constant-flow nozzle of figure and said structure, each member is made of equal metal material, and it is applied in the water reacting metal engine fuel, utilizes this nozzle that water is introduced the combustion chamber; The actual use shows, when combustion chamber pressure changes between 0.2MPa-0.55MPa, the discharge of back pressure adaptive constant-flow nozzle of the present invention of flowing through is constant near 0.035kg/s, worst error is 1.7%, and discharge is crossed the problem that senior general's flame is put out by water when having solved water reacting metal engine fuel effectively and changing a job condition.
Claims (1)
1, a kind of back pressure adaptive constant-flow nozzle, comprise sleeve (1), it is characterized in that, be provided with center-pole (10) in the described sleeve (1), this center-pole (10) rear portion is a cylindrical body (4) and anterior be bullet (8), the bigger end of described bullet (8) is positioned at jet expansion (9) one sides, the front end that is set with the annular space (7) that forms between piston (2) and this piston (2) inner chamber and the described bullet (8) on the described center-pole (10) is communicated with described jet expansion (9) and its rear end is communicated with passage (6) front end in the described cylindrical body, this passage (6) rear end is fuel filler (5), between piston (2) rear end and sleeve (1) rear end spring (3) is housed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100311769A CN100441950C (en) | 2006-01-23 | 2006-01-23 | Back pressure adaptive constant-flow nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100311769A CN100441950C (en) | 2006-01-23 | 2006-01-23 | Back pressure adaptive constant-flow nozzle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1932380A true CN1932380A (en) | 2007-03-21 |
| CN100441950C CN100441950C (en) | 2008-12-10 |
Family
ID=37878338
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100311769A Expired - Fee Related CN100441950C (en) | 2006-01-23 | 2006-01-23 | Back pressure adaptive constant-flow nozzle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100441950C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102692157A (en) * | 2012-06-28 | 2012-09-26 | 上海理工大学 | Pressure equalizing device of fixed spraying systems |
| CN102901122A (en) * | 2011-07-29 | 2013-01-30 | 通用电气公司 | Premixing apparatus for gas turbine system |
| CN103592961A (en) * | 2013-09-24 | 2014-02-19 | 中国科学院力学研究所 | Kerosene flow control device for supersonic combustion test |
| CN110410822A (en) * | 2018-04-27 | 2019-11-05 | 中国航发商用航空发动机有限责任公司 | The rotarytype injector of variable-throat area |
| CN113696621A (en) * | 2021-08-26 | 2021-11-26 | 惠州市特创电子科技股份有限公司 | Self-cleaning nozzle of printing plate and application thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101844045B (en) * | 2010-05-20 | 2012-05-02 | 合肥工业大学 | Nozzle for high-shear homogenate pump |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2230812Y (en) * | 1995-04-04 | 1996-07-10 | 北京市瑞比德机电新技术公司 | Constant current clogging device |
| JPH11270743A (en) * | 1998-03-20 | 1999-10-05 | Toyo Valve Co Ltd | Low-noise constant flow instrument |
| US6089474A (en) * | 1999-01-19 | 2000-07-18 | Marino; Robert M. | Hose nozzle apparatus and method |
| DE19927392A1 (en) * | 1999-06-16 | 2000-12-21 | Bosch Gmbh Robert | Valve for use in hydraulic lifting devices has valve body which slides between inlet and outlet against effect of spring and has bore which cooperates with control diaphragm with through bore into which conical projection on valve body fits |
-
2006
- 2006-01-23 CN CNB2006100311769A patent/CN100441950C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102901122A (en) * | 2011-07-29 | 2013-01-30 | 通用电气公司 | Premixing apparatus for gas turbine system |
| US9388985B2 (en) | 2011-07-29 | 2016-07-12 | General Electric Company | Premixing apparatus for gas turbine system |
| CN102901122B (en) * | 2011-07-29 | 2016-12-07 | 通用电气公司 | Pre-mixing apparatus for gas turbine system |
| CN102692157A (en) * | 2012-06-28 | 2012-09-26 | 上海理工大学 | Pressure equalizing device of fixed spraying systems |
| CN103592961A (en) * | 2013-09-24 | 2014-02-19 | 中国科学院力学研究所 | Kerosene flow control device for supersonic combustion test |
| CN103592961B (en) * | 2013-09-24 | 2016-05-25 | 中国科学院力学研究所 | The kerosene oil flow control device of Supersonic combustion tests |
| CN110410822A (en) * | 2018-04-27 | 2019-11-05 | 中国航发商用航空发动机有限责任公司 | The rotarytype injector of variable-throat area |
| CN113696621A (en) * | 2021-08-26 | 2021-11-26 | 惠州市特创电子科技股份有限公司 | Self-cleaning nozzle of printing plate and application thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100441950C (en) | 2008-12-10 |
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| CF01 | Termination of patent right due to non-payment of annual fee |