CN201461179U - Slide valve type needle valve coupling of marine diesel engine oil sprayer assembly - Google Patents
Slide valve type needle valve coupling of marine diesel engine oil sprayer assembly Download PDFInfo
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- CN201461179U CN201461179U CN2009201199623U CN200920119962U CN201461179U CN 201461179 U CN201461179 U CN 201461179U CN 2009201199623 U CN2009201199623 U CN 2009201199623U CN 200920119962 U CN200920119962 U CN 200920119962U CN 201461179 U CN201461179 U CN 201461179U
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Abstract
The utility model discloses a slide valve type needle valve coupling of a marine diesel engine oil sprayer assembly, which comprises a needle valve body. The needle valve body is equipped with a needle valve, a thrust block seat, a nozzle and a fastening part, the needle valve is fittingly ground on the inner cavity wall of the needle valve body, the front portion of the needle valve extends into an inner cavity of the nozzle via a front end hole of the needle valve body, an inner cavity at the rear end of the needle valve is in sliding clearance fit with the periphery of the front portion of the thrust block seat, the front portion of the needle valve is in sliding clearance fit with the nozzle, the rear portion of the thrust block seat is equipped with a boss which is in interference fit with the rear end surface of the needle valve body, and mounting position of the nozzle is positioned by the fastening part. The needle valve coupling is compact in structure, small in volume, fine in property, low in oil consumption, low in discharge and strong in reliability, has the advantages that carbon is seldom accumulated in the nozzle, the service life of the nozzle is long and the like, and can meet requirements of marine diesel engines upon oil sprayer needle valve couplings.
Description
Technical field
The utility model relates to marine diesel engine manufacturing technology field, particularly marine diesel engine fuel injector assembly guiding valve type pintle nozzle matching parts.
Background technique
Oil sprayer is the important composition parts of diesel engine, and its major function is that the high-pressure diesel from Injection Pump is atomized by certain requirement, and is distributed to the good inflammable mixture of formation in the firing chamber.Pintle nozzle match-ing parts as the injector assembly core is a secondary precision pair, and high-precision being slidingly matched done with the needle-valve body inner periphery in the guide cylinder surface on needle-valve top, and its gap and surface roughness require very high.Seat surface on the cone match needle-valve body at needle-valve middle part seals, and when oil pressure reached cracking pressure, the spray orifice of nozzle was opened in the needle-valve take-off.Guide cylinder face on the pintle nozzle match-ing parts and sealing cone must form through correct grinding and mutual bedding-in.At the oil sprayer duration of work, have the matching gap seepage of a spot of diesel oil from pintle nozzle match-ing parts, this part diesel oil can draw back filter cleaner or oil sump tank by return tube to the pintle nozzle match-ing parts lubricate.Play a decisive role as the pintle nozzle match-ing parts of injector assembly core component service behaviour to oil sprayer.Existing pintle nozzle match-ing parts is owing to exist certain space between nozzle and the sealing cone, easily remaining a little fuel oil in the nozzle, easy plug nozzle spray orifice after the carbonization, this spray orifice is subjected to the effect of high pressure mist of oil in high-temperature work environment, corrosion failure easily takes place in the spray orifice end, and influences the atomizing effect of fuel oil.
Summary of the invention
Technical problem to be solved in the utility model is the present situation at prior art, a kind of delicate structure is provided, volume is little, performance good, oil consumption is low, discharging less, the marine diesel engine fuel injector assembly guiding valve type pintle nozzle matching parts of good reliability.It is few that it has in the nozzle carbon distribution, and advantages such as nozzle long service life can satisfy the requirement of marine diesel engine to the fuel injector needle valve coupling.
The utility model solves the problems of the technologies described above the technological scheme that is adopted: marine diesel engine fuel injector assembly guiding valve type pintle nozzle matching parts, include needle-valve body, and wherein: needle-valve body is fitted with needle-valve, thrust block, nozzle and fastening piece; The internal chamber wall of needle-valve body grinds and cooperates the dress needle-valve, and the needle-valve front portion extend in the nozzle chamber through the front aperture of needle-valve body; Needle-valve rear end inner chamber cooperates with the anterior periphery glade plane space of thrust block; The front portion of needle-valve cooperates with the nozzle glade plane space, and the thrust block rear portion is shaped between boss and the needle-valve body ear end face and adopts interference fit; The mounting point of fastening piece location nozzle.
The measure of taking also comprises:
The conical surface and the seat surface on the needle-valve body on the above-mentioned needle-valve constitute the cavity that is used for sealed high pressure diesel oil.
Above-mentioned nozzle is formed by the isobaric compacting of Co-based alloy powder heat; The matching gap of needle-valve and needle-valve body in 0.010 millimeter to 0.013 millimeter scope, the roughness of matching surface at the Ra0.015 micron to the Ra0.08 micrometer range; The cylindricity that cooperates periphery is in 0.001 millimeter to 0.003 millimeter scope; The circular runout amplitude of the conical surface on the needle-valve and the seat surface relative engagement face on the needle-valve body is in 0.001 millimeter to 0.003 millimeter scope; The matching gap of needle-valve and nozzle is in 0.02 millimeter to 0.04 millimeter scope.
The above-mentioned needle-valve and the matching gap of needle-valve body are at 0.012 millimeter, and the roughness of matching surface is at the Ra0.05 micron; The cylindricity that cooperates periphery is at 0.002 millimeter; The circular runout amplitude of the conical surface on the needle-valve and the seat surface relative engagement face on the needle-valve body is at 0.002 millimeter; The matching gap of needle-valve and nozzle is at 0.03 millimeter.
Compared with prior art, needle-valve body of the present utility model is fitted with needle-valve, thrust block, nozzle and fastening piece; The internal chamber wall of needle-valve body grinds and cooperates the dress needle-valve, and the needle-valve front portion extend in the nozzle chamber through the front aperture of needle-valve body; Needle-valve rear end inner chamber cooperates with the anterior periphery glade plane space of thrust block; The front portion of needle-valve cooperates with the nozzle glade plane space, and the thrust block rear portion is shaped between boss and the needle-valve body ear end face and adopts interference fit; The mounting point of fastening piece location nozzle. the utility model pintle nozzle match-ing parts delicate structure, volume is little, performance good, oil consumption is low, discharging less, good reliability; It is few to have the interior carbon distribution of nozzle, and advantages such as nozzle long service life can satisfy the requirement of marine diesel engine to the fuel injector needle valve coupling.
Description of drawings
Fig. 1 is the schematic representation of the utility model embodiment vertical profile structure.
Embodiment
Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.
Embodiment as shown in Figure 1, figure grade explanation: needle-valve body 1, needle-valve 2, thrust block 3, nozzle 4, fastening piece 5.
The utility model embodiment, marine diesel engine fuel injector assembly guiding valve type pintle nozzle matching parts includes needle-valve body 1, it is characterized in that: needle-valve body 1 is fitted with needle-valve 2, thrust block 3, nozzle 4 and fastening piece 5; The internal chamber wall of needle-valve body 1 grinds and cooperates dress needle-valve 2, and needle-valve 2 front portions extend in nozzle 4 inner chambers through the front aperture of needle-valve body 1; Needle-valve 2 rear end inner chambers cooperate with thrust block 3 anterior periphery glade plane spaces; The front portion of needle-valve 2 cooperates with nozzle 4 glade plane spaces, and thrust block 3 rear portions are shaped between boss and needle-valve body 1 ear end face and adopt interference fit; The mounting point of fastening piece 5 location nozzles 4.Seat surface on the conical surface on the needle-valve 2 and the needle-valve body 1 constitutes the cavity that is used for sealed high pressure diesel oil.Nozzle 4 is formed by the Co-based alloy powder isobaric compacting of heat (HIP); Can guarantee effectively that nozzle satisfies job requirement, prolong the working life of nozzle, have hardness height, good toughness, characteristics such as high temperature resistant, corrosion-resistant.
Embodiment's critical component needle-valve 2 and the matching gap of needle-valve body 1 in 0.010 millimeter to 0.013 millimeter scope, the roughness of matching surface at the Ra0.015 micron to the Ra0.08 micrometer range; The cylindricity that cooperates periphery is in 0.001 millimeter to 0.003 millimeter scope; The circular runout amplitude of the seat surface relative engagement face on the conical surface on the needle-valve 2 and the needle-valve body 1 is in 0.001 millimeter to 0.003 millimeter scope; The matching gap of needle-valve 2 and nozzle 4 is in 0.02 millimeter to 0.04 millimeter scope.
Preferable selection parameter is, the matching gap of needle-valve 2 and needle-valve body 1 is at 0.012 millimeter, and the roughness of matching surface is at the Ra0.05 micron; The cylindricity that cooperates periphery is at 0.002 millimeter; The circular runout amplitude of the seat surface relative engagement face on the conical surface on the needle-valve 2 and the needle-valve body 1 is at 0.002 millimeter; The matching gap of needle-valve 2 and nozzle 4 is at 0.03 millimeter.
Though the utility model illustrates and describes by the reference preferred embodiment,, those skilled in the art should understand, and in scope of the present utility model, can do the various variation on form and the details.
Claims (4)
1. marine diesel engine fuel injector assembly guiding valve type pintle nozzle matching parts includes needle-valve body (1), it is characterized in that: described needle-valve body (1) is fitted with needle-valve (2), thrust block (3), nozzle (4) and fastening piece (5); The internal chamber wall of described needle-valve body (1) grinds to cooperate adorns described needle-valve (2), and the anterior front aperture through described needle-valve body (1) of described needle-valve (2) extend in described nozzle (4) inner chamber; Needle-valve (2) rear end inner chamber cooperates with the anterior periphery glade plane space of thrust block (3); The front portion of needle-valve (2) cooperates with nozzle (4) glade plane space, and thrust block (3) rear portion is shaped between boss and needle-valve body (1) ear end face and adopts interference fit; Described fastening piece (5) is located the mounting point of described nozzle (4).
2. marine diesel engine fuel injector assembly guiding valve type pintle nozzle matching parts according to claim 1 is characterized in that: the seat surface on the conical surface on the described needle-valve (2) and the needle-valve body (1) constitutes the cavity that is used for sealed high pressure diesel oil.
3. marine diesel engine fuel injector assembly guiding valve type pintle nozzle matching parts according to claim 1 and 2 is characterized in that: described nozzle (4) is formed by the isobaric compacting of Co-based alloy powder heat; The matching gap of described needle-valve (2) and needle-valve body (1) in 0.010 millimeter to 0.013 millimeter scope, the roughness of matching surface at the Ra0.015 micron to the Ra0.08 micrometer range; The cylindricity that cooperates periphery is in 0.001 millimeter to 0.003 millimeter scope; The circular runout amplitude of the seat surface relative engagement face on the conical surface on the needle-valve (2) and the needle-valve body (1) is in 0.001 millimeter to 0.003 millimeter scope; The matching gap of needle-valve (2) and nozzle (4) is in 0.02 millimeter to 0.04 millimeter scope.
4. marine diesel engine fuel injector assembly guiding valve type pintle nozzle matching parts according to claim 3 is characterized in that: the matching gap of described needle-valve (2) and needle-valve body (1) is at 0.012 millimeter, and the roughness of matching surface is at the Ra0.05 micron; The cylindricity that cooperates periphery is at 0.002 millimeter; The circular runout amplitude of the seat surface relative engagement face on the conical surface on the needle-valve (2) and the needle-valve body (1) is at 0.002 millimeter; The matching gap of needle-valve (2) and nozzle (4) is at 0.03 millimeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201199623U CN201461179U (en) | 2009-05-15 | 2009-05-15 | Slide valve type needle valve coupling of marine diesel engine oil sprayer assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201199623U CN201461179U (en) | 2009-05-15 | 2009-05-15 | Slide valve type needle valve coupling of marine diesel engine oil sprayer assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201461179U true CN201461179U (en) | 2010-05-12 |
Family
ID=42388533
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201199623U Expired - Fee Related CN201461179U (en) | 2009-05-15 | 2009-05-15 | Slide valve type needle valve coupling of marine diesel engine oil sprayer assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201461179U (en) |
-
2009
- 2009-05-15 CN CN2009201199623U patent/CN201461179U/en not_active Expired - Fee Related
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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: 20100512 Termination date: 20150515 |
|
| EXPY | Termination of patent right or utility model |