CN202832924U - Ejection nozzle of ejector - Google Patents
Ejection nozzle of ejector Download PDFInfo
- Publication number
- CN202832924U CN202832924U CN2012204653963U CN201220465396U CN202832924U CN 202832924 U CN202832924 U CN 202832924U CN 2012204653963 U CN2012204653963 U CN 2012204653963U CN 201220465396 U CN201220465396 U CN 201220465396U CN 202832924 U CN202832924 U CN 202832924U
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- Prior art keywords
- needle
- valve
- foot piece
- needle valve
- valve body
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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.)
- Withdrawn - After Issue
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Abstract
The utility model discloses an ejection nozzle of an ejector. The ejection nozzle comprises a needle valve body and a non-tail-rod needle valve, wherein the needle valve body is sleeved on the outer side of the non-tail-rod needle valve and in clearance fit with the non-tail-rod needle valve. The non-tail-rod needle valve comprises a needle valve guide section, the end portion of the non-tail-rod needle valve protrudes out of a seal large end face of the needle valve body, the protruding portion is sleeved on a corresponding groove of a needle valve guide sleeve and used for supporting and guiding the guide sleeve, and a plunger is used for transmitting pressure for controlling the head portion of the non-tail-rod needle valve to open or close an ejection hole formed in a needle valve body seat. According to the protruding portion of the non-tail-rod needle valve, a sunk groove structure does not need to be processed in the seal large end face of the needle valve body, lost length of a guide section of matching parts of the ejection nozzle can effectively reduce unnecessary fuel leakage, and the length of the guide section of the matching parts can be increased so that stability and reliability of the ejection nozzle are improved.
Description
Technical field
The utility model relates to a kind of jet blower of sparger, the jet blower that particularly uses in a kind of fuel supply system sparger.
Background technique
Jet blower is the part of fuel supply system sparger.Jet blower generally comprises a needle-valve body and a needle-valve, and needle-valve is set in the needle-valve body, and both cooperate for couple.Jet blower is as the outlet of oil-fired system provisioning engine fuel oil, its structural feature affected sparger emitted dose, injection rate, sprayability, the distribution of oil bundle in the firing chamber etc.The performance of fuel injection system is relevant with jet blower to a great extent, and the structural parameter of jet blower are to the power character of motor, Economy, and emission performance all has very important impact.Based on the significance of above jet blower in assembly, need the raising height of strict control needle-valve, to realize accurate injection.
At present, the jet blower of available technology adopting mainly contains two kinds of structures: the conventional spray mouth of the first for being widely adopted, needle-valve has the needle-valve foot piece, the foot piece diameter is less than the guide section diameter, the foot piece end face protrudes needle-valve body sealing large end face, needle-valve guide section end face (being the ladder omoplate plane among Fig. 1-A) is lower than needle-valve body sealing large end face Δ, be used for the accurately work lift of control needle-valve, the actual effective guiding length of having dwindled the needle-valve guide section of the Δ lift of this structure, in course of working, need simultaneously match grinding or apolegamy fine finishing, just can realize accurate lift, difficulty of processing is larger.
The Novel spraying nozzle of the second for bringing into use in the recent period, be used for electric-controlled fuel injector (referring to Fig. 1-B), needle valve end and needle-valve body sealing large end face are flush configuration, because the needle-valve afterbody is provided with plunger and is used to the needle-valve transmission of pressure, in order to guarantee that both effectively lead, improve the transmission of centering and power, need to use guide sleeve A, and available technology adopting is offered deep gouge B at the sealing large end face place of needle-valve body, the part of guide sleeve A need to embed among this deep gouge B, this design proposal has shortened effective guide section length L of needle-valve equally, and the loss of guide section length can increase the leakage rate of fuel oil, makes simultaneously the needle-valve guiding unstable.For remedying defects, even need additional dual-guiding structure, to realize accurate guiding, greatly increased difficulty of processing and processing cost, the requirement of machining accuracy is also increased.
The common defective of above-mentioned two kinds of structural jet blowers all is to have sacrificed effective guide section length, and it is unstable to lead, and has increased quantity of fuel leakage.Therefore, be badly in need of a kind ofly both can having guaranteed that guiding was stable, can guarantee again that the effective length of needle-valve guide section do not lose simultaneously, reduce the jet blower structural design of quantity of fuel leakage.
The model utility content
The utility model is in order to overcome defective in the above-mentioned prior art, a kind of jet blower of sparger to be provided, so that the effective length of needle-valve guide section is not lost, reduce to greatest extent quantity of fuel leakage, keeping simultaneously guiding stable.
For realizing above-mentioned model utility purpose, the utility model provides a kind of jet blower of sparger, comprise needle-valve body and without the foot piece needle-valve, needle-valve body be set in outside without the foot piece needle-valve and with cooperate without the foot piece needle clearance, comprise without the foot piece needle-valve: the needle-valve guide section, the sealing large end face of needle-valve body is protruded in its end, projection is socketed in and is used in the corresponding recesses of needle-valve guide sleeve guide sleeve is supported, leads, and closes or open the spray orifice that is positioned on the needle-valve body seat by plunger transmission of pressure and then control without foot piece needle-valve head.Avoided processing the deep gouge structure at the sealing large end face of needle-valve body without the design of foot piece needle-valve projection, and the guide section length of the jet blower couple of loss, can effectively reduce unnecessary fuel leakage, increase couple guide section length, and then improve stability and the reliability of jet blower.
In the technique scheme, can be designed as the sealing large end face 1 of protrusion needle-valve body to 5mm without foot piece needle-valve end face.
In the technique scheme, it is identical and can be the time processing moulding that needle-valve projection and needle-valve are positioned at the guide section section diameter of needle-valve body.The problem that processing cost is high, difficulty of processing is large of having avoided secondary operations to bring.
In the technique scheme, without between foot piece needle-valve projection and the needle-valve guide sleeve for guiding accuracy cooperates, and cooperate for the gap surplus between plunger and the needle-valve guide sleeve; In addition, can also be designed to without between foot piece needle-valve projection and the needle-valve guide sleeve for the gap surplus cooperates, and cooperate for guiding accuracy between plunger and the needle-valve guide sleeve.These two kinds of designs have increased the effective length of needle-valve guide section, and then have effectively reduced quantity of fuel leakage under stable prerequisite is led in assurance.
In the technique scheme, plunger and without being provided with the needle-valve pad between the foot piece needle-valve.Can realize the accurate control of needle lift by the needle-valve pad, reduce the machining accuracy of needle-valve projection protrusion height.
In the technique scheme, be positioned at without the foot piece needle-valve on the guide section of needle-valve body seat and be laid with annular oil groove.The section configuration of annular oil groove can be designed as arc, V-type, rectangle or other similar shape.
Compared with prior art, the utlity model has following beneficial effect:
1, the jet blower in the utility model can effectively guarantee the effective length of thread engagement of needle-valve guide section, has reduced the couple leakage rate;
2, realize the accurate control of needle lift by the needle-valve pad, namely the needle-valve pad carries out the accurate adjustment of needle lift tolerance, has reduced the machining accuracy of needle-valve protrusion height;
3, without the targeting part of foot piece needle-valve in needle-valve body, and needle-valve projection and guide sleeve mating part can be the time processing moulding, is easier to implement guiding without foot piece needle-valve projection, realized accurate location.Under the prerequisite that guarantees same product performance, reduced processing cost, difficulty of processing, machining accuracy and cost of production, and be easier to realize batch product;
4, under the prerequisite that guarantees the jet blower original function, reduced the difficulty of processing deep gouge in the needle-valve body mesopore, the place, aperture simply carries out the appearance that chamfering or fillet can reduce burr and flange;
5, the uniform annular oil groove that increases without the guide section of foot piece needle-valve in needle-valve body is optional structure, it can effectively reduce the couple amount of leakage, improve the centering of needle-valve, and can hold fine particle impurity in annular groove, reduction needle-valve clamping stagnation, stuck situation occur.
Description of drawings
Fig. 1-A is the first jet blower structural representation in the prior art;
Fig. 1-B is the second jet blower structural representation in the prior art;
Fig. 2 is the structural representation that the utility model jet blower cooperates with the sparger assembly;
Fig. 3 is the needle-valve of the utility model jet blower and the structural representation of needle-valve body;
Fig. 4-the 1st, linkage structure embodiment's 1 schematic representation of the needle-valve of the utility model jet blower and guide sleeve, plunger;
Fig. 4-the 2nd, linkage structure embodiment's 2 schematic representation of the needle-valve of the utility model jet blower and guide sleeve, plunger;
Fig. 5-the 1st, annular oil groove embodiment 1 schematic representation on the needle-valve guide section of the utility model jet blower;
Fig. 5-the 2nd, annular oil groove embodiment 2 schematic representation on the needle-valve guide section of the utility model jet blower;
Fig. 5-the 3rd, annular oil groove embodiment 3 schematic representation on the needle-valve guide section of the utility model jet blower.
Mark the following drawings mark thereon by reference to the accompanying drawings:
The A-jet blower, A1-needle-valve body, A11-orifice chamfer, A12-needle-valve body sealing large end face, A13-needle valve seat' s cone, A14-spray orifice, A2-is without the foot piece needle-valve, A21-annular oil groove, A22-needle-valve end face, 1-needle-valve guide sleeve, 2-plunger, 3-needle-valve pad, the 4-piston spring, 5-solenoid valve, 6-solenoid valve spring, 7-carries out valve, the fuel-displaced throttle orifice of 8-, 9-pressure control cavity.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail, but is to be understood that protection domain of the present utility model is not subjected to the restriction of embodiment.
As shown in Figure 2, paper is sparger assembly and jet blower cooperating structure part and working procedure once: under solenoid valve 5 off-positions, carry out valve 7 and under the elastic force effect of solenoid valve spring 6, close the fuel-displaced throttle orifice 8 of pressure control cavity 9, fuel pressure in the pressure control cavity 9, pass to needle-valve A2 by plunger 2, so that the power that acts on the needle-valve A2 reaches balance, this moment, needle-valve A2 dropped on the seat surface A13 of needle-valve body A1, thereby the oil circuit that will flow to spray orifice A14 turn-offs, and needle-valve A2 is in closed condition; Under solenoid valve 5 "on" positions, the pressure in the fuel-displaced throttle orifice release pressure control chamber 9 is opened in adhesive thereby execution valve 7 quilt under the effect of electromagnetic force makes progress, when the pressure decreased in the control chamber 9 and when breaking the equilibrium of forces that acts on the needle-valve, needle-valve A2 opens and also realizes spraying.
Further as shown in Figure 2, because plunger 2 is passed to needle-valve A2 with pressure, both needs connect by 1 transition of needle-valve guide sleeve, to realize the transmission of accurate guiding, motion and hydraulic coupling.Be provided with needle-valve pad 3 between plunger 2 and needle-valve A2, the effect of needle-valve pad 3 is lifts of carrier fluid pressure and fine adjustment needle-valve A2.Realize the accurate control of needle lift by needle-valve pad 3, can effectively reduce the machining accuracy of needle-valve protrusion height.
Further as shown in Figure 3, jet blower A comprises that a needle-valve body A1 and one are set in the endoporus of needle-valve body A1 without foot piece needle-valve A2 without foot piece needle-valve A2, and both are that couple cooperates, and matching gap can be 0.002 ~ 0.006mm.Take a seat when closing spray orifice A14 state without foot piece needle-valve A2, the Δ that protrudes needle-valve body sealing large end face A12 without foot piece needle-valve A2 tail plane A22 is about 1 ~ 5mm, and the effect of this projection is to cooperate with needle-valve guide sleeve endoporus, and supports.Compare with A22 is concordant with the A12 of prior art, A22 of the present utility model protrudes A12, need not like this to process deep gouge at needle-valve body sealing large end face, only needs in the corresponding position chamfering A11 to be set and gets final product.
Further shown in Fig. 2 to 4, without being connected of projection and the plunger 2 of foot piece needle-valve A2, needle-valve guide sleeve 1 cooperating as follows:
Shown in Fig. 4-1, needle-valve guide sleeve 1a is arranged in the cavity at piston spring 4 places, and be set in the outside of plunger 2, the end of needle-valve guide sleeve 1a is connected on the piston spring 4, the other end is established groove, this groove and needle-valve projection precision-fit (little Spielpassung, has leading role, for guiding accuracy cooperates), form socket and also can be used for support without foot piece needle-valve A2, be provided with gap surplus (be large Spielpassung, plunger 2 and without being a kind of supporting relation between the foot piece needle-valve A2) between plunger 2 and the needle-valve guide sleeve 1a.The fit system of this needle-valve, needle-valve guide sleeve 1a and plunger has been avoided offering deep gouge at needle-valve body A1 sealing large end face, has increased the effective length of needle-valve guide section, and then has effectively reduced quantity of fuel leakage.
Shown in Fig. 4-2, be with embodiment 1 difference, it (is large Spielpassung that groove on the needle-valve guide sleeve 1b and the socket place of needle-valve projection are provided with the gap surplus, only have supporting effect not have leading role between the two), be that precision-fit (is little Spielpassung between plunger 2 and the needle-valve guide sleeve 1b, has leading role, for guiding accuracy cooperates).Embodiment 2 is actual to be guide section to be extended to needle-valve guide sleeve 1b and plunger 2 afterbodys lead.Only needle-valve guide sleeve 1b is supported without foot piece needle-valve A2 afterbody, cooperated with needle-valve guide sleeve 1b mesopore by plunger 2 and lead.Similar to Example 1, the fit system of this needle-valve, needle-valve guide sleeve 1b and plunger 2 can be avoided offering deep gouge at needle-valve body A1 sealing large end face equally, has increased the effective length of needle-valve guide section, and then has effectively reduced quantity of fuel leakage.
Further comprise Fig. 5-1,5-2,5-3 such as Fig. 3,5() shown in, on embodiment 1,2 basis, also optionally increase groove structure, namely increase uniform annular groove A21 at the guide section that cooperates with needle-valve body A1 without foot piece needle-valve A2, can further reduce the amount of leakage of couple, that improves spindle can hold granule impurity from centering with in annular groove.As with groove structure, annular groove A21 shape can be and is not limited to: circular-arc annular groove A211, V-type annular groove A212 or rectangle annular groove A213.
The advantage of above-described embodiment structure of the present utility model under the prerequisite that guarantees its original service behaviour, has guaranteed effective guiding length that the jet blower couple cooperates in terms of existing technologies, has improved sealing, has reduced the couple leakage rate; Can realize the accurate control of needle lift by the needle-valve pad, reduce the machining accuracy of needle-valve projection height; Needle-valve, needle-valve body targeting part, and extension and guide sleeve mating part can be the time processing moulding, the needle-valve projection is easier to implement guiding, has realized accurate location.Under the prerequisite that guarantees same product performance, reduced processing cost, difficulty of processing, machining accuracy and cost of production, and be easier to realize batch product.
More than disclosed only be several specific embodiment of the present utility model, still, the utility model is not limited thereto, the changes that any person skilled in the art can think of all should fall into protection domain of the present utility model.
Claims (8)
1. the jet blower of a sparger comprises needle-valve body and without the foot piece needle-valve, described needle-valve body be set in outside without the foot piece needle-valve and with cooperate without the foot piece needle clearance, it is characterized in that, describedly comprise without the foot piece needle-valve:
The needle-valve guide section, the sealing large end face of described needle-valve body is protruded in its end, described projection is socketed in and is used in the corresponding recesses of needle-valve guide sleeve described guide sleeve is supported, leads, and closes or open the spray orifice that is positioned on the described needle-valve body seat by plunger transmission of pressure and then control without foot piece needle-valve head.
2. the jet blower of sparger according to claim 1 is characterized in that, described end face without foot piece needle-valve projection protrudes the sealing large end face 1 of needle-valve body to 5mm.
3. the jet blower of sparger according to claim 2 is characterized in that, the described projection of described needle-valve guide section is identical with the guide section section diameter that is positioned at needle-valve body without the foot piece needle-valve and for the time processing moulding.
4. the jet blower of sparger according to claim 3 is characterized in that, described without between foot piece needle-valve projection and the needle-valve guide sleeve for guiding accuracy cooperates, cooperate for the gap surplus between described plunger and the needle-valve guide sleeve.
5. the jet blower of sparger according to claim 3 is characterized in that, described without between foot piece needle-valve projection and the needle-valve guide sleeve for the gap surplus cooperates, cooperate for guiding accuracy between described plunger and the needle-valve guide sleeve.
6. according to claim 4 or the jet blower of 5 described spargers, it is characterized in that described plunger and without the needle-valve pad that is provided with between the foot piece needle-valve for reducing needle-valve end face protrusion height precision.
7. according to claim 4 or the jet blower of 5 described spargers, it is characterized in that, be laid with annular oil groove on the described guide section that is positioned at the needle-valve body seat without the foot piece needle-valve.
8. the jet blower of sparger according to claim 7 is characterized in that, the section configuration of described annular oil groove is arc, V-type or rectangle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204653963U CN202832924U (en) | 2012-09-12 | 2012-09-12 | Ejection nozzle of ejector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204653963U CN202832924U (en) | 2012-09-12 | 2012-09-12 | Ejection nozzle of ejector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202832924U true CN202832924U (en) | 2013-03-27 |
Family
ID=47944651
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012204653963U Withdrawn - After Issue CN202832924U (en) | 2012-09-12 | 2012-09-12 | Ejection nozzle of ejector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202832924U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103670859A (en) * | 2012-09-12 | 2014-03-26 | 北京亚新科天纬油泵油嘴股份有限公司 | Ejection nozzle of ejector |
| CN114542346A (en) * | 2022-03-09 | 2022-05-27 | 一汽解放汽车有限公司 | Oil sprayer and stroke control method of long needle valve of oil sprayer |
-
2012
- 2012-09-12 CN CN2012204653963U patent/CN202832924U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103670859A (en) * | 2012-09-12 | 2014-03-26 | 北京亚新科天纬油泵油嘴股份有限公司 | Ejection nozzle of ejector |
| CN103670859B (en) * | 2012-09-12 | 2016-08-03 | 北京亚新科天纬油泵油嘴股份有限公司 | The jet blower of ejector |
| CN114542346A (en) * | 2022-03-09 | 2022-05-27 | 一汽解放汽车有限公司 | Oil sprayer and stroke control method of long needle valve of oil sprayer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Li Chunyan Inventor after: Li Jun Inventor after: Cang Wei Inventor after: Shang Wei Inventor before: Li Chunyan Inventor before: Cang Wei Inventor before: Shang Wei |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: LI CHUNYAN ZANG WEI SHANG WEI TO: LI CHUNYAN LI JUN ZANG WEI SHANG WEI |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20130327 Effective date of abandoning: 20160803 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |