CN205135875U - Fuel injection nozzle idol piece of needle valve area cladding material - Google Patents
Fuel injection nozzle idol piece of needle valve area cladding material Download PDFInfo
- Publication number
- CN205135875U CN205135875U CN201520911500.0U CN201520911500U CN205135875U CN 205135875 U CN205135875 U CN 205135875U CN 201520911500 U CN201520911500 U CN 201520911500U CN 205135875 U CN205135875 U CN 205135875U
- Authority
- CN
- China
- Prior art keywords
- needle
- valve
- cladding material
- nozzle
- needle valve
- 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 - Fee Related
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- Fuel-Injection Apparatus (AREA)
- Nozzles (AREA)
Abstract
The utility model provides a fuel injection nozzle idol piece of needle valve area cladding material, includes nozzle valve and locates the needle valve in the nozzle valve, is equipped with flourishing oil groove in the nozzle valve, and nozzle valve's upper end is equipped with the oil feed passageway of the flourishing oil groove of intercommunication, and nozzle valve's lower extreme is equipped with the nozzle opening, and the top of needle valve is equipped with the direction cylinder with nozzle valve sealing contact, and the direction cylinder is equipped with diamond -like cladding material outward. The utility model discloses the fit clearance range of reducing on a fuel injection nozzle idol direction face of cylinder can reach 35~45%. And the fit clearance of needle valve can reach 1.5 - 2.5 mu behind the cladding material. In addition needle valve head sealing conical face is because cladding material, and hardness improves by a wide margin, and the leakproofness has great improvement. DLC cladding material has been solved because of reducing the getting up early wearing and tearing that the fit clearance brought and easily blocking dead drawback, has improved the availability factor of product, has prolonged the life of product.
Description
Technical field
The utility model relates to P type series injector nozzle matching parts, particularly relates to a kind of Oil-Spray Match Parts of needle-valve band coating.
Background technique
At present, oil nozzle is precision pair that is the most accurate in diesel fuel system, most critical, and needle-valve is then one of them precision parts.Along with the requirement of diesel engine direct injection high speed, high pressure, low emission improves day by day.Diesel engine has realized automatically controlled, precisely can provide fuel oil and every work cycle realizes repeatedly oil spout, the frequency of needle-valve open and close campaign is former several times time, with the raising of fuel pressure, the matching gap of needle-valve guide cylinder and needle-valve body also will reduce, needle-valve matching gap 2.5-3.5 μ of non-coating.Oil nozzle, under this bad working environments, easily forms approximate dry friction, needle-valve that situation is serious will be stuck, has a strong impact on working life and the utilization efficiency of injector nozzle matching parts.
Model utility content
The utility model will solve above-mentioned prior art Problems existing, provides a kind of Oil-Spray Match Parts of needle-valve band coating, realizes guide cylinder matching gap little, and not easily stuck.
The utility model solves the technological scheme that its technical problem adopts: the Oil-Spray Match Parts of this needle-valve band coating, comprise needle-valve body and be located at the needle-valve in needle-valve body, oil holding slot is provided with in needle-valve body, the upper end of needle-valve body is provided with the oil inlet passage being communicated with oil holding slot, the lower end of needle-valve body is provided with nozzle opening, the upper part of needle-valve is provided with and seals with needle-valve body the guide cylinder contacted, and is provided with DLC coating outside guide cylinder.
In order to perfect further, be provided with the sealed seat surface of inclination bottom needle-valve body, the bottom of needle-valve is provided with and seals with sealed seat surface the face of needle seating contacted, and is provided with DLC coating outside face of needle seating.
Perfect further, the part that needle-valve is positioned at oil holding slot is provided with about one group compensating groove spaced apart.
Perfect further, compensating groove have 4-6 bar and annular spread at the outer wall of needle-valve.The cell body design of compensating groove adopts one fixed width, not only plays balanced action, and can alleviate the weight of needle-valve.
DLC (DLC) coating is carried out to the sealing cone part of needle-valve guide cylinder part and bottom, solves injector nozzle matching parts premature wear and easily stuck quality problems.Wherein pressure chamber's sidewall is provided with the spray orifice that quantity does not wait, and needle valve bottom end is provided with sealing cone, and ring packing line is just located at conical surface place.The inner cone of it and needle-valve body altogether, just forms a complete ring packing line.DLC coating formal name used at school is ion assisted chemical vapor phase deposition, its a kind of compound certainly moisten ware reducing coating layer, because it is that stratiform structure has very strong adhesive force, there is the friction and wear that extremely low friction factor can reduce workpiece surface greatly, friction factor between common metallic steel is 0.8, and the friction factor between surperficial DLC coated metal steel and common metal steel is only 0.2, it has hardness high (HV25g reaches 2000), its plating fineness is high besides, does not destroy by the precision of coating matrix.
The effect that the utility model is useful is: the matching gap in the utility model Oil-Spray Match Parts guide cylinder face reduces amplitude and can reach 35 ~ 45%.And the matching gap of needle-valve can reach 1.5-2.5 μ after coating.The another needle-valve head seal conical surface is due to coating, and hardness significantly improves, and sealing has greatly improved.DLC coating solves the getting up early brought because reducing matching gap and weares and teares and easily stuck drawback, improves the utilization efficiency of product, extends the working life of product.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the enlarged diagram of part A in Fig. 1;
Fig. 3 is the structural representation of needle-valve in the utility model;
Fig. 4 is the view in transverse section in Fig. 3 on B-B direction.
Description of reference numerals: needle-valve body 1, needle-valve 2, guide cylinder 2-1, compensating groove 2-2, oil holding slot 3, oil inlet passage 4, nozzle opening 5, DLC coating 6, sealed seat surface 7, face of needle seating 8.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail:
With reference to accompanying drawing: the Oil-Spray Match Parts of needle-valve band coating in the present embodiment, the needle-valve 2 comprising needle-valve body 1 and be located in needle-valve body 1, oil holding slot 3 is provided with in needle-valve body 1, the upper end of needle-valve body 1 is provided with the oil inlet passage 4 being communicated with oil holding slot 3, the lower end of needle-valve body 1 is provided with nozzle opening 5, the upper part of needle-valve 2 is provided with and seals with needle-valve body 1 the guide cylinder 2-1 contacted, and is provided with DLC coating 6 outside guide cylinder 2-1.Be provided with the sealed seat surface 7 of inclination bottom needle-valve body 1, the bottom of needle-valve 2 is provided with and seals with sealed seat surface 7 face of needle seating 8 contacted, and is provided with DLC coating 6 outside face of needle seating 8.
The part that wherein needle-valve 2 is positioned at oil holding slot 3 is provided with about one group compensating groove 2-2 spaced apart.Compensating groove 2-2 have 4-6 bar and annular spread at the outer wall of needle-valve 2.
Although the utility model has illustrated by reference to preferred embodiment and has described, those skilled in the art should understand, and in the scope of claims, can do the various change in form and details.
Claims (4)
1. the Oil-Spray Match Parts of a needle-valve band coating, comprise needle-valve body (1) and be located at the needle-valve (2) in needle-valve body (1), oil holding slot (3) is provided with in needle-valve body (1), the upper end of needle-valve body (1) is provided with the oil inlet passage (4) being communicated with oil holding slot (3), the lower end of needle-valve body (1) is provided with nozzle opening (5), it is characterized in that: the upper part of described needle-valve (2) is provided with the guide cylinder (2-1) sealing with needle-valve body (1) and contact, and is provided with DLC coating (6) outside guide cylinder (2-1).
2. the Oil-Spray Match Parts of needle-valve band coating according to claim 1, it is characterized in that: described needle-valve body (1) bottom is provided with the sealed seat surface (7) of inclination, the bottom of needle-valve (2) is provided with the face of needle seating (8) sealing with sealed seat surface (7) and contact, and is provided with DLC coating (6) outside face of needle seating (8).
3. the Oil-Spray Match Parts of needle-valve band coating according to claim 1, is characterized in that: the part that described needle-valve (2) is positioned at oil holding slot (3) is provided with about one group compensating groove (2-2) spaced apart.
4. the Oil-Spray Match Parts of needle-valve band coating according to claim 3, is characterized in that: described compensating groove (2-2) has 4-6 bar and the outer wall of annular spread in needle-valve (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520911500.0U CN205135875U (en) | 2015-11-16 | 2015-11-16 | Fuel injection nozzle idol piece of needle valve area cladding material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520911500.0U CN205135875U (en) | 2015-11-16 | 2015-11-16 | Fuel injection nozzle idol piece of needle valve area cladding material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205135875U true CN205135875U (en) | 2016-04-06 |
Family
ID=55621675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520911500.0U Expired - Fee Related CN205135875U (en) | 2015-11-16 | 2015-11-16 | Fuel injection nozzle idol piece of needle valve area cladding material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205135875U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20180372018A1 (en) * | 2015-12-17 | 2018-12-27 | Robert Bosch Gmbh | Fuel injection nozzle |
-
2015
- 2015-11-16 CN CN201520911500.0U patent/CN205135875U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20180372018A1 (en) * | 2015-12-17 | 2018-12-27 | Robert Bosch Gmbh | Fuel injection nozzle |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160406 Termination date: 20171116 |