CN201474815U - Oil injection nozzle needle valve body with transition section on inlet of pressure chamber - Google Patents
Oil injection nozzle needle valve body with transition section on inlet of pressure chamber Download PDFInfo
- Publication number
- CN201474815U CN201474815U CN2009203015501U CN200920301550U CN201474815U CN 201474815 U CN201474815 U CN 201474815U CN 2009203015501 U CN2009203015501 U CN 2009203015501U CN 200920301550 U CN200920301550 U CN 200920301550U CN 201474815 U CN201474815 U CN 201474815U
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- CN
- China
- Prior art keywords
- valve body
- pressure chamber
- needle
- changeover portion
- ingress
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- Expired - Fee Related
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Abstract
The utility model relates to an oil injection nozzle device of a diesel engine fuel oil system, in particular to an oil injection nozzle needle valve body with a transition section on the inlet of a pressure chamber, which mainly solves the technical problem that the lift range is smaller, atomization is not good and the flow is reduced when the oil injection nozzle matching part is lifted, if the lift is over large, oil injection time is increased and the oil injection quantity is more, so the oil consumption, the discharge and the like are affected in the prior art. The oil injection nozzle device comprises a hollow needle valve body, wherein the bottom of the needle valve body is provided with a pressure chamber, the needle valve body is provided with an injection hole, the needle valve body is internally provided with a cylindrical cavity, the lower end of the cylindrical cavity is provided with an inner conical surface, a transition section which is connected with the inlet of the pressure chamber is arranged under the inner conical surface, a cylindrical section is connected between the upper part and the lower part of the transition section, and the height h1 of the cylindrical section is 0 to 0.4mm; on the vertical section of the needle valve body, the two sides of the inlet of the pressure chamber and the two sides of the lower part of the cylindrical section form two connecting lines, and the included angle of the two connecting lines is less than the conical angle of the inner conical surface.
Description
Technical field
The utility model relates to a kind of fueling injection equipment of diesel fuel system, especially relates to a kind of isostructural improvement of nozzle needle valve body to ingress, pressure chamber band changeover portion.
Background technique
Diesel engine is used for making the oil nozzle of fuel-oil atmozation to be made up of needle-valve body and needle-valve, needle-valve body is provided with oil inlet passage, fuel oil enters in the center hole at needle-valve body middle part from oil inlet passage, needle-valve is done the high speed to-and-fro motion in the needle-valve body center hole, make fuel oil spray, guarantee the abundant burning of fuel oil from the nozzle atomization of needle-valve body bottom.As shown in Figure 1 and Figure 2, use single conical surface needle-valve, have the advantages that pressure chamber's volume dwindles, ingress, pressure chamber flow area reduces with respect to the injector nozzle matching parts that uses bipyramid face needle-valve.Chinese patent discloses a kind of fuel injector needle valve coupling (notice of authorization number: CN 201025200Y), it comprises needle-valve and needle-valve body, needle-valve is structurally from being followed successively by angle of lead foremost backward, the primary seal conical surface, secondary angle, valve rod and guide cylinder face, the external diameter at needle-valve upper valve rod place and the internal diameter of needle-valve body form the annular space that allows fuel oil to flow through, the radially bilateral gap of annular space is 1.3 millimeters～2.4 millimeters, the valve rod external diameter is 5.9 millimeters, internal diameter with second order hole, valve rod cooperation place on the needle-valve body is by 7.2～8.2 millimeters, internal diameter with second order hole, valve rod cooperation place on the needle-valve body is 7.8 ± 0.1 millimeters, the cone-apex angle of place, the secondary angle conical surface of needle-valve is 40 degree, and the guide cylinder face outer ring of needle-valve is provided with two annular oil grooves.But this needle-valve has only a single conical surface, and oil nozzle is littler than bipyramid face needle-valve in the circulation area of ingress, pressure chamber at the single conical surface needle-valve of same lift, easily produces throttling under identical lift situation.Lift is less than normal to make the throttling of ingress, pressure chamber cause atomisation pressure to reduce, and it is bad to atomize, and flow reduces; The excessive needle-valve time of taking a seat of lift is spun out, and it is also many that injection time increases fuel injection quantity, and the impact force of seat surface is increased, and has shortened working life.
The model utility content
The utility model technical issues that need to address provide the nozzle needle valve body of ingress, a kind of pressure chamber band changeover portion, its mainly be solve the existing in prior technology injector nozzle matching parts when same lift single conical surface needle-valve in the circulation area of ingress, pressure chamber than the little problem of bipyramid face needle-valve, easily produce throttling at the situation of the identical lift conical surface that places an order, then make the throttling of ingress, pressure chamber cause atomisation pressure to reduce as lift is less than normal, it is bad to atomize, and flow reduces; Spin out as the excessive needle-valve time of taking a seat of lift, injection time increases that fuel injection quantity also more influences oil consumption and discharging, and the impact force of seat surface also increases, the technical problem that has shortened working life etc.
Above-mentioned technical problem of the present utility model is mainly solved by following technical proposals:
The nozzle needle valve body of ingress, pressure chamber of the present utility model band changeover portion, the needle-valve body that comprises hollow, the needle-valve body bottom is provided with the pressure chamber, have spray orifice on the needle-valve body with pressure chamber and needle-valve body external communications, it is characterized in that described needle-valve body inside is provided with circular cylindrical cavity, the lower end of circular cylindrical cavity is provided with inner conical surface, the inner conical surface below is provided with the changeover portion that is connected the ingress, pressure chamber, be connected with cylindrical section between changeover portion top and the inner conical surface bottom, the height h of cylindrical section is 0～0.4mm; On the longitudinal plane of needle-valve body, two lines are formed in the both sides of both sides, ingress, pressure chamber and cylindrical section bottom, and the angle of these two lines is less than the taper angle of inner conical surface.The needle-valve of single conical surface can be housed in the needle-valve body.Be provided with changeover portion between inner conical surface below and the ingress, pressure chamber, on the longitudinal plane of changeover portion, the intersection point of the both sides of itself and both sides, ingress, pressure chamber, cylindrical section bottom is formed two lines, article two, the angle of line is less than the taper angle of inner conical surface, when cooperating, can make throttling place diameter become big like this, make single conical surface needle-valve also can not produce throttling in use with single conical surface needle-valve.Can establish cylindrical section between inner conical surface and the changeover portion, when not establishing cylindrical section, the inner conical surface lower end directly connects changeover portion.
As preferably, described on the longitudinal plane of needle-valve body, two lines are formed in the both sides of both sides, ingress, pressure chamber and cylindrical section bottom, and the angle α of these two lines is 0～45 °.When the angle α of two lines was 0 °, promptly two lines were parallel to each other, and changeover portion is cylindrical; And when the angle α of two lines was not 0 °, changeover portion was the conical surface.
As preferably, described angle α is 20～45 °, avoids throttling and the minimum better effects if of pressure chamber's volume.
As preferably, the section of described changeover portion internal surface is straight line or camber line or broken line, the section of changeover portion internal surface also can be other shapes, but which kind of shape no matter, the intersection point of the both sides of changeover portion and both sides, ingress, pressure chamber, cylindrical section bottom is formed two lines, and the angle of two lines must be less than the taper angle of inner conical surface.
As preferably, the diameter of described cylindrical section is φ 1～φ 1.2mm.
As preferably, described pressure chamber is made up of with the cylindrical body that the hemisphere upper end is connected hemisphere, and cylindrical height h2 is 0～0.4mm.When h2 was 0, the pressure chamber can be made up of hemisphere separately.
As preferably, described cylindrical height h2 is 0.1～0.4mm.
Therefore, the utlity model has at changeover portion of ingress, needle-valve body pressure chamber increase, make under the constant situation of original pressure chamber and mouth body structure, bipyramid face needle-valve changes single conical surface needle-valve into and does not also produce throttling in the ingress, pressure chamber, both can dwindle pressure chamber's volume, throttling can not produced again in less lift, characteristics such as making has oil consumption preferably and discharging under each operating mode, simple and reasonable for structure.
Description of drawings
Accompanying drawing 2 is assembly structure schematic representation of former bipyramid face needle-valve and needle-valve body;
Accompanying drawing 3 is a kind of structural representations of the present utility model;
Accompanying drawing 5 is B portion structure for amplifying schematic representation of Fig. 4 of embodiment 2;
Accompanying drawing 7 is assembly structure schematic representation of the present utility model.
Component, position and numbering among the figure: needle-valve body 1, pressure chamber 2, spray orifice 3, circular cylindrical cavity 4, inner conical surface 5, changeover portion 6, cylindrical section 7, needle-valve 8.
Embodiment
Below by embodiment, and in conjunction with the accompanying drawings, the technical solution of the utility model is described in further detail.
Embodiment 1: the nozzle needle valve body of ingress, the pressure chamber band changeover portion that this is routine, as Fig. 1, Fig. 2, the needle-valve body 1 that a hollow is arranged, needle-valve body 1 inside is provided with circular cylindrical cavity 4, the lower end of circular cylindrical cavity 4 is connected with inner conical surface 5, inner conical surface 5 lower ends are connected with cylindrical section 7, and the diameter of cylindrical section is φ 1.1mm, and height h is 0.03mm.The lower end of cylindrical section is connected with changeover portion 6, and the changeover portion lower end is connected with pressure chamber 2, has the spray orifice 3 with the needle-valve body external communications with pressure chamber 2 on the needle-valve body.On the longitudinal plane of changeover portion 6, the internal surface of changeover portion is a straight line, and promptly the internal surface of changeover portion is the conical surface, and changeover portion 6 is formed two lines with the intersection point of the both sides of both sides, 2 ingress, pressure chamber, cylindrical section 7 bottoms, article two, the angle α of line is 38 ° less than the taper angle of inner conical surface.
During use, as Fig. 5, single conical surface needle-valve 8 is packed in the needle-valve body 1, needle-valve 8 is done the piston motion up and down in needle-valve body 1, and fuel oil penetrates from the nozzle opening that is located at needle-valve body 1 bottom.The utility model adopts single conical surface needle-valve to substitute bipyramid face needle-valve can reduce P-V 26%.If pressure chamber's diameter changes 0.9mm into, can reduce P-V 37%.
Embodiment 2: the nozzle needle valve body of ingress, the pressure chamber band changeover portion that this is routine, as Fig. 5, on the longitudinal plane of changeover portion 6, the internal surface of changeover portion is a camber line.
All the other are with embodiment 1.
Embodiment 3: the nozzle needle valve body of ingress, the pressure chamber band changeover portion that this is routine, as Fig. 6, on the longitudinal plane of changeover portion 6, the internal surface of changeover portion is a broken line.
All the other are with embodiment 1.
Claims (7)
1. the nozzle needle valve body of ingress, pressure chamber band changeover portion, the needle-valve body (1) that comprises hollow, the needle-valve body bottom is provided with pressure chamber (2), have on the needle-valve body pressure chamber (2) spray orifice (3) with the needle-valve body external communications, it is characterized in that described needle-valve body (1) inside is provided with circular cylindrical cavity (4), the lower end of circular cylindrical cavity is provided with inner conical surface (5), inner conical surface (5) below is provided with the changeover portion (6) that is connected ingress, pressure chamber (2), changeover portion top and inner conical surface (5) are connected with cylindrical section (7) between the bottom, and the height h1 of cylindrical section is 0～0.4mm; On the longitudinal plane of needle-valve body (1), two lines are formed in the both sides of both sides, ingress, pressure chamber (2) and cylindrical section (7) bottom, and the angle of these two lines is less than the taper angle of inner conical surface (5).
2. the nozzle needle valve body of ingress, pressure chamber according to claim 1 band changeover portion, it is characterized in that described on the longitudinal plane of needle-valve body (1), two lines are formed in the both sides of both sides, ingress, pressure chamber (2) and cylindrical section (7) bottom, and the angle α of these two lines is 0～45 °.
3. the nozzle needle valve body of ingress, pressure chamber according to claim 2 band changeover portion is characterized in that described angle α is 20～45 °.
4. according to the nozzle needle valve body of claim 1 or 2 or 3 described pressure chamber ingress band changeover portion, the section that it is characterized in that described changeover portion (6) internal surface is straight line or camber line or broken line.
5. according to the nozzle needle valve body of claim 1 or 2 or 3 described pressure chamber ingress band changeover portion, the diameter that it is characterized in that described cylindrical section (7) is φ 1～φ 1.2mm.
6. according to the nozzle needle valve body of claim 1 or 2 or 3 described pressure chamber ingress band changeover portion, it is characterized in that described pressure chamber (2) is made up of with the cylindrical body that the hemisphere upper end is connected hemisphere, cylindrical height h2 is 0～0.4mm.
7. the nozzle needle valve body of ingress, pressure chamber according to claim 6 band changeover portion is characterized in that described cylindrical height h2 is 0.1～0.4mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203015501U CN201474815U (en) | 2009-03-24 | 2009-03-24 | Oil injection nozzle needle valve body with transition section on inlet of pressure chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203015501U CN201474815U (en) | 2009-03-24 | 2009-03-24 | Oil injection nozzle needle valve body with transition section on inlet of pressure chamber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201474815U true CN201474815U (en) | 2010-05-19 |
Family
ID=42411061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009203015501U Expired - Fee Related CN201474815U (en) | 2009-03-24 | 2009-03-24 | Oil injection nozzle needle valve body with transition section on inlet of pressure chamber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201474815U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102182599A (en) * | 2011-03-30 | 2011-09-14 | 潍柴动力股份有限公司 | Dimethyl ether engine fuel supply system and fuel injector thereof |
-
2009
- 2009-03-24 CN CN2009203015501U patent/CN201474815U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102182599A (en) * | 2011-03-30 | 2011-09-14 | 潍柴动力股份有限公司 | Dimethyl ether engine fuel supply system and fuel injector thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100519 Termination date: 20150324 |
|
| EXPY | Termination of patent right or utility model |