CN104358646A - Diesel engine tar nozzle - Google Patents
Diesel engine tar nozzle Download PDFInfo
- Publication number
- CN104358646A CN104358646A CN201410633793.0A CN201410633793A CN104358646A CN 104358646 A CN104358646 A CN 104358646A CN 201410633793 A CN201410633793 A CN 201410633793A CN 104358646 A CN104358646 A CN 104358646A
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- China
- Prior art keywords
- needle
- needle valve
- valve
- valve body
- section
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Abstract
The invention discloses a diesel engine tar nozzle. The diesel engine tar nozzle comprises a needle valve and a needle valve body, wherein the needle valve body is provided with an inner hole; the needle valve is connected in the inner hole of the needle valve body in a sleeving manner; a guiding segment I, a pressure storing cavity, a guiding segment II, an air eliminating cavity and a jetting hole are formed in sequence in the inner hole from left to right; a region which corresponds to the guiding segment I on the needle valve is marked as a matching segment I; a region which corresponds to the guiding segment II on the needle valve is marked as a matching segment II. Improvements are that the inner wall of the guiding segment II is provided with a helical groove; the outer wall of the matching segment II is provided with a plurality of straight grooves; the axial directions of the straight grooves are parallel to the axial direction of the needle valve; the straight grooves are uniformly distributed along the circumferential direction of the needle valve. The diesel engine tar nozzle has the beneficial effects that the consistence of the sealing surface abrasion progress between the needle valve and the needle valve body can be enhanced, and failure in sealing caused by excessively quick local abrasion of a sealing surface is avoided.
Description
Technical field
The present invention relates to a kind of diesel engine fuel injecting technology, particularly relate to a kind of diesel injector.
Background technique
The diesel injector be made up of needle-valve and needle-valve body is one of core component in diesel engine fuel injection system, and its working stability is significant for whole injection system.In prior art, the surface of contact of needle-valve and needle-valve body is smooth surface, Problems existing is: during diesel injector work, needle-valve is ceaselessly to-and-fro motion vertically in needle-valve body, the contacting part of the two is for a long time after single direction match grinding, due to the existence of machining error, cause the degree of wear property of there are differences of different parts on needle-valve and needle-valve body, especially sealing surface position (described sealing surface formed by the conical surface of needle-valve tip and the conical surface of jet orifice of needle valve), needle-valve and needle-valve body are for a long time after single direction match grinding, there will be the problem that sealing surface concentrated wear is too fast, this will cause sealing to occur declining, and finally make sealing effect lose efficacy.
Summary of the invention
For the problem in background technique, the present invention proposes a kind of diesel injector, comprise needle-valve and needle-valve body, described needle-valve body is provided with endoporus, needle-valve is socketed in needle-valve body endoporus; Described endoporus forms guide section I, pressure accumulation chamber, guide section II, cool down chamber and spray orifice from left to right successively; On needle-valve, the section of corresponding guide section I is designated as and coordinates section I, and on needle-valve, the section of corresponding guide section II is designated as and coordinates section II, and its innovation is: the inwall of described guide section II is provided with spiral chute; The outer wall of described cooperation section II is provided with many straight troughs, and straight trough axis and needle-valve parallel to an axis, many straight troughs are uniformly distributed along needle-valve circumference.
Principle of the present invention is: be also provided with oil input channel in the region on needle-valve body beyond endoporus, oil input channel one end is communicated with pressure accumulation chamber, the oil input channel the other end is communicated with needle-valve body top plane, the diesel oil of high pressure to be entered in pressure accumulation chamber by oil input channel and by the gap-fill between needle-valve and needle-valve body, during oil spout, needle-valve is upwards mentioned by solenoid valve, and sealing surface is opened, and diesel stream sprays from spray orifice after guide section II and chamber of cooling down, after adopting the solution of the present invention, during oil spout, diesel stream is in the process of guide section II, under spiral fluted leading role, diesel oil flows through guide section II in a spiral form, now, needle-valve circumferentially will rotate under the active force effect of diesel oil, in diesel engine running, along with the repetition opening and closing of nozzle, needle-valve will constantly circumferentially rotate, thus constantly change the contact position of needle-valve tip and the jet orifice of needle valve place conical surface, this just can make the wearing and tearing progress of each position on sealing surface more consistent, thus avoid the too fast problem of concentrated wear that causes because of long-term unidirectional match grinding, ensure that needle-valve tip and the jet orifice of needle valve place conical surface can keep good laminating for a long time, the sealing of sealing surface reliably and with long-term, in addition, also impurity can be enable more effectively to discharge from spray orifice, avoid needle-valve because of impurity buildups hair fastener, straight trough on needle-valve can increase the effect of the circumferential component in diesel oil active force to needle-valve, and needle-valve can be rotated more effectively.
Preferably, the described spiral fluted degree of depth is 0.1mm ~ 5mm.
Preferably, the described straight trough degree of depth is 0.1mm ~ 5mm.
Preferably, the quantity of described straight trough is 2 ~ 20.
Advantageous Effects of the present invention is: the conformity that can improve sealing surface wear progress between needle-valve and needle-valve body, avoids sealing surface seal failure because concentrated wear is too fast.
Accompanying drawing explanation
Fig. 1, structural profile schematic diagram of the present invention;
Fig. 2, needle valve structure schematic diagram;
Fig. 3, needle-valve body generalized section;
In figure, each title corresponding to mark is respectively: needle-valve 1, straight trough 1-1, coordinate section I 1-2, coordinate section II 1-3, needle-valve body 2, guide section I 3, pressure accumulation chamber 4, guide section II 5, spiral chute 5-1, chamber 6 of cooling down, spray orifice 7, oil input channel 8.
Embodiment
A kind of diesel injector, comprise needle-valve 1 and needle-valve body 2, described needle-valve body 2 is provided with endoporus, needle-valve 1 is socketed in needle-valve body 2 endoporus; Described endoporus forms guide section I 3, pressure accumulation chamber 4, guide section II 5, cool down chamber 6 and spray orifice 7 from left to right successively; On needle-valve 1, the section of corresponding guide section I 3 is designated as and coordinates section I 1-2, and on needle-valve 1, the section of corresponding guide section II 5 is designated as and coordinates section II 1-3, and its innovation is: the inwall of described guide section II 5 is provided with spiral chute 5-1; The outer wall of described cooperation section II 1-3 is provided with many straight trough 1-1, and straight trough 1-1 axis and needle-valve 1 parallel to an axis, many straight trough 1-1 are uniformly distributed along needle-valve 1 circumference.
Further, the degree of depth of described spiral chute 5-1 is 0.1mm ~ 5mm.
Further, the described straight trough 1-1 degree of depth is 0.1mm ~ 5mm.
Further, the quantity of described straight trough 1-1 is 2 ~ 20.
Claims (4)
1. a diesel injector, comprise needle-valve (1) and needle-valve body (2), (2) are provided with endoporus to described needle-valve body, and needle-valve (1) is socketed in needle-valve body (2) endoporus; Described endoporus forms guide section I (3), pressure accumulation chamber (4), guide section II (5), chamber of cooling down (6) and spray orifice (7) from left to right successively; The section of the upper corresponding guide section I (3) of needle-valve (1) is designated as and coordinates section I (1-2), the section of the upper corresponding guide section II (5) of needle-valve (1) is designated as and coordinates section II (1-3), it is characterized in that: the inwall of described guide section II (5) is provided with spiral chute (5-1); The outer wall of described cooperation section II (1-3) is provided with many straight troughs (1-1), and straight trough (1-1) axis and needle-valve (1) parallel to an axis, many straight troughs (1-1) are uniformly distributed along needle-valve (1) circumference.
2. diesel injector according to claim 1, is characterized in that: the degree of depth of described spiral chute (5-1) is 0.1mm ~ 5mm.
3. diesel injector according to claim 1, is characterized in that: described straight trough (1-1) degree of depth is 0.1mm ~ 5mm.
4. diesel injector according to claim 1, is characterized in that: the quantity of described straight trough (1-1) is 2 ~ 20.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410633793.0A CN104358646A (en) | 2014-11-12 | 2014-11-12 | Diesel engine tar nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410633793.0A CN104358646A (en) | 2014-11-12 | 2014-11-12 | Diesel engine tar nozzle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104358646A true CN104358646A (en) | 2015-02-18 |
Family
ID=52525942
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410633793.0A Pending CN104358646A (en) | 2014-11-12 | 2014-11-12 | Diesel engine tar nozzle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104358646A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105715438A (en) * | 2016-03-30 | 2016-06-29 | 无锡美羊动力科技有限公司 | Efficient diesel engine oil nozzle internally provided with triangular rotary tooth |
| CN108533377A (en) * | 2018-04-16 | 2018-09-14 | 浙江创格科技有限公司 | A kind of injector assembly of high cooling efficiency |
| CN111905937A (en) * | 2020-07-17 | 2020-11-10 | 陕西航空电气有限责任公司 | Oil nozzle |
| CN114992025A (en) * | 2022-06-09 | 2022-09-02 | 北京航空航天大学 | Aero-engine fuel injector matching part adapting to fuel supply of carbon-negative biofuel |
-
2014
- 2014-11-12 CN CN201410633793.0A patent/CN104358646A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105715438A (en) * | 2016-03-30 | 2016-06-29 | 无锡美羊动力科技有限公司 | Efficient diesel engine oil nozzle internally provided with triangular rotary tooth |
| CN108533377A (en) * | 2018-04-16 | 2018-09-14 | 浙江创格科技有限公司 | A kind of injector assembly of high cooling efficiency |
| CN111905937A (en) * | 2020-07-17 | 2020-11-10 | 陕西航空电气有限责任公司 | Oil nozzle |
| CN114992025A (en) * | 2022-06-09 | 2022-09-02 | 北京航空航天大学 | Aero-engine fuel injector matching part adapting to fuel supply of carbon-negative biofuel |
| CN114992025B (en) * | 2022-06-09 | 2023-10-31 | 北京航空航天大学 | Aeroengine fuel injector matching part adapting to carbon-negative biofuel supply |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150218 |
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| RJ01 | Rejection of invention patent application after publication |