CN85102659B - Multi-hole oil nozzle - Google Patents
Multi-hole oil nozzle Download PDFInfo
- Publication number
- CN85102659B CN85102659B CN85102659A CN85102659A CN85102659B CN 85102659 B CN85102659 B CN 85102659B CN 85102659 A CN85102659 A CN 85102659A CN 85102659 A CN85102659 A CN 85102659A CN 85102659 B CN85102659 B CN 85102659B
- Authority
- CN
- China
- Prior art keywords
- needle
- valve
- needle valve
- valve body
- oil nozzle
- Prior art date
- 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.)
- Expired
Links
- 238000007789 sealing Methods 0.000 claims abstract description 17
- 239000007921 spray Substances 0.000 claims abstract description 7
- 238000002347 injection Methods 0.000 abstract description 12
- 239000007924 injection Substances 0.000 abstract description 12
- 239000000446 fuel Substances 0.000 abstract description 5
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 11
- 239000000295 fuel oil Substances 0.000 description 4
- 238000003913 materials processing Methods 0.000 description 4
- 238000000889 atomisation Methods 0.000 description 3
- 239000002283 diesel fuel Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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- Fuel-Injection Apparatus (AREA)
Abstract
A multi-hole oil nozzle belongs to an oil injection device of a diesel engine fuel system, and is a pair of precision coupling parts consisting of a needle valve and a needle valve body. The design characteristics are as follows: the cylinder with a chamfer at the end part at the lower part of the sealing conical surface of the needle valve is matched with the inner shape of the head part of the needle valve body to form a section of equal-section annular channel with a gap of 0.2 mm. The size of the head of the oil nozzle with the structure can meet the requirement of arranging more spray holes, and the pressure-bearing area ratio of the needle valve is about 0.45. The oil nozzle has good processing manufacturability and small seat surface contact stress, and simultaneously, the dynamic property, the economical efficiency and the emission performance of the engine are improved.
Description
A kind of perforated plate type atomizer belongs to the fueling injection equipment of diesel fuel system.
In the prior art, the secondary precision pair formed by needle-valve and needle-valve body of known perforated plate type atomizer.The sealing cone bottom of its needle-valve body is a cylindrical cavity, and several nozzle openings and exterior are arranged, and the end of needle-valve is the taper that the awl point is arranged, and the cone flank face at the bottom of this taper is a sealing cone, and matches with the sealing cone of needle-valve body.When needle-valve is taken a seat, form big cavity that retains fuel oil between needle-valve and the needle-valve body, be referred to as the pressure chamber usually.In addition, the bearing area of needle-valve is bigger than all, generally more than 0.6.The injection starting pressure of this oil nozzle is little with the pressure reduction amplitude of closing valve pressure, easily produces secondary injection, and the pressure chamber influences the atomization quality of later stage injected fuel, and makes the HC discharging big.
The objective of the invention is, design a kind of perforated plate type atomizer, further to satisfy the combustion requirements of using this kind oil nozzle motor, the change of its structure, should make the flow losses of fuel oil little, pressure surge is little, and atomization quality is good, prevents that the ability of secondary injection is strong, improve fuel injection rate, shorten oil injection duration, thereby make the power character of motor, Economy and emission performance improve.
Formation of the present invention is, is used for the fueling injection equipment of diesel fuel system, a kind of perforated plate type atomizer.It is by the secondary precision pair that needle-valve and needle-valve body are formed, and the body diameter on its needle-valve sealing cone top suitably strengthens, and the bearing area of needle-valve is reduced to about 0.45 than, also makes injection starting pressure obtain corresponding raising simultaneously.The round column structure of an auspicious chamfering is adopted in the sealing cone bottom of needle-valve, the internal rows shape of needle-valve body head is consistent with the nose shape of needle-valve, above-mentioned 0.2 mm clearance of only having an appointment between the two constitutes prismatic annular pass, and fuel oil sprays from spray orifice through this passage.Pressure chamber's volume of this structure is little, and therefore, we are referred to as small pressure chamber's oil nozzle.The profile of needle-valve body head adopts inverted cone-shaped structure, and nozzle opening is distributed in one week of its conical surface.Because the needle-valve of this oil nozzle and the head dimensions of needle-valve body are bigger, can satisfy the requirement of more spray orifice number, even surpass 10 spray orifices, the inboard of these spray orifices is communicated with.
The inside and outside cylinder and the spherical structure combining of also can adopting of needle-valve body head, nozzle opening is distributed in one week of bulb, and certainly, above-mentioned needle-valve and needle-valve body also can adopt other suitable shapes.
Description of drawings:
Accompanying drawing 1 is one nine a hole oil nozzle.
Accompanying drawing 2 is one five hole oil nozzles.
Be a most preferred embodiment of the present invention below, provide details of the present invention by description and accompanying drawing to its structure.
As shown in Figure 1, parts (1) are needle-valves, generally use W18Cr4V materials processing.Parts (2) are needle-valve bodies, generally use 18Cr
2The similar material of other performances is perhaps adopted in Ni4WA materials processing.For the motor of cylinder diameter D≤150 millimeter, the diameter d of parts (1)
1=6 millimeters, grind mutually after the endoporus apolegamy of it and parts (2), both form a secondary precision pair.The diameter d of the cylinder (1a) of parts (1)
2=4.5 millimeters, so its bearing area is than δ=d
1 2-d
2 2/ d
1 2=0.4375.The sealing cone angle of parts (1) is 60 degree.Corresponding, the cone angle of the sealing cone of parts (2) is 59 degree, and above-mentioned sealing cone all must correct grinding.The diameter d of the cylinder (1b) of parts (1) sealing cone bottom
3=3.6 millimeters, it is the chamfering of 35 degree that there is cone angle the end of this cylinder.The aperture of the cylinder (2b) of parts (2) sealing cone bottom is 4 millimeters, and the bottom is flat, and it is the interior chamfering of 35 degree that cone angle is arranged, and this is just in time consistent with the shape of needle-valve head, forms the ring-type uniform section passage of 0.2 mm wide between the two.It is the cones of 35 degree that the head of parts (2) adopts cone angle, and 9 apertures are that 0.25 millimeter, angle are that the nozzle openings of 160 degree are distributed on one week of this cone side, and links to each other with above-mentioned ring-type uniform section passage.
Be a variant embodiment of the present invention below, provide a nearly details of the present invention by description and accompanying drawing to its structure.
As shown in Figure 2, this is a kind of body oil nozzle.Parts (1) are needle-valves, generally use W18Cr4V materials processing.Parts (2) are needle-valve bodies, generally use 15CrMOV materials processing.The diameter d of the cylinder (1a) on parts (1) sealing cone top
2=4.2 millimeters, thus its bearing area than δ=d12-d22/d12=0.51, (d
1=6 millimeters).The diameter d of the cylinder (1b) of parts (1) sealing cone bottom
3=2.6 millimeters, it is the chamfering of 60 degree that there is cone angle the end of this cylinder (1b), and the inside of parts (2) head is to be spherical cylindrical cavity the end, and its internal diameter is 3 millimeters, therefore, form the ring-type uniform section passage of 0.2 mm wide between parts (1) and the parts (2).The profile of parts (2) head is with inner identical, and its external diameter is 5 millimeters, and 5 apertures are that 0.29 millimeter nozzle opening is distributed in one week of bulb.
Effect of the present invention is, because having reduced the bearing area ratio of pressure chamber and needle-valve, this oil nozzle make it when injected fuel, the flow resistance and the pressure surge of fuel oil are little, fuel injection rate improves, oil injection duration shortens, atomization quality is good, even use the outlet valve that does not have the decompression band, also can not produce secondary injection.The structure of this oil nozzle adds good manufacturability, and the contact stress of taking a seat of needle-valve is little, so long service life simultaneously, is improved power character, Economy and the emission performance of motor.
Claims (1)
1, a kind of perforated plate type atomizer, the secondary precision pair that it is made up of needle-valve (1) and needle-valve body (2), the sealing cone of needle-valve (1) is 60 degree, the sealing cone of the needle-valve body that matches with it (2) is 59 degree, take to increase the diameter of cylinder (1a) on the sealing cone top of needle-valve (1), making the bearing area ratio of needle-valve (1) is about 0.45, a plurality of spray orifices are distributing in one week of head of needle-valve body (2), the invention is characterized in, the sealing cone bottom of above-mentioned needle-valve (1) has the end the cylinder of chamfering (1b), the shape of this part matches with the interior shape of needle-valve body (2) head, forms an intersegmental crack and be 0.2 millimeter uniform section annular pass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85102659A CN85102659B (en) | 1985-04-01 | 1985-04-01 | Multi-hole oil nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85102659A CN85102659B (en) | 1985-04-01 | 1985-04-01 | Multi-hole oil nozzle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85102659A CN85102659A (en) | 1986-02-10 |
| CN85102659B true CN85102659B (en) | 1986-11-12 |
Family
ID=4792661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN85102659A Expired CN85102659B (en) | 1985-04-01 | 1985-04-01 | Multi-hole oil nozzle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN85102659B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4119812B2 (en) * | 2003-09-19 | 2008-07-16 | ボッシュ株式会社 | Fuel injection valve |
| US8322004B2 (en) * | 2009-04-29 | 2012-12-04 | Caterpilar Inc. | Indirect laser induced residual stress in a fuel system component and fuel system using same |
| CN102979654B (en) * | 2012-12-20 | 2016-06-29 | 余姚市舒春机械有限公司 | A kind of anti-carbon deposition cooling type pintle nozzle match-ing parts |
| CN203867753U (en) * | 2013-10-24 | 2014-10-08 | 中国船舶重工集团公司第七一一研究所 | Oil sprayer |
| CN106762303B (en) * | 2016-12-15 | 2019-08-27 | 江苏大学 | An orifice type fuel injector for controlling the injection stability of a commercial vehicle diesel engine with a small amount of fuel |
-
1985
- 1985-04-01 CN CN85102659A patent/CN85102659B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN85102659A (en) | 1986-02-10 |
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|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| PB01 | Publication | ||
| C06 | Publication | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CE01 | Termination of patent right |