CN101338721B - Marine diesel guiding valve type pintle nozzle matching parts - Google Patents
Marine diesel guiding valve type pintle nozzle matching parts Download PDFInfo
- Publication number
- CN101338721B CN101338721B CN2008100634590A CN200810063459A CN101338721B CN 101338721 B CN101338721 B CN 101338721B CN 2008100634590 A CN2008100634590 A CN 2008100634590A CN 200810063459 A CN200810063459 A CN 200810063459A CN 101338721 B CN101338721 B CN 101338721B
- Authority
- CN
- China
- Prior art keywords
- needle
- valve
- nozzle
- valve body
- pin 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
Links
Images
Landscapes
- Fuel-Injection Apparatus (AREA)
Abstract
The present invention discloses a slide valve type pin valve coupling of a marine diesel engine, which comprises a pin valve body, a pin valve, a thrust block seat, a spout and a fastener which are suitably assembled together; wherein, the pin valve, the front part of which is extended into the cavity of the spout via the front hole of the pin valve body, is arranged in the cavity of the pin valve body in clearance fit; the rear cavity of the pin valve is in interference fit with the periphery of the front part of the thrust block seat in a sliding way; the front part of the pin valve is in interference fit with the spout in a sliding way; the rear part of the thrust block seat is provided with a lug boss, which is in interference fit with the rear end surface of the pin valve body; the assembling position of the spout is determined by the fastener; the pin valve can directly shut the spray hole of the spout by shutting a high-pressure oil circuit and can prevent the spray hole of thespout from being blocked by carbonized residue fuel oil in the cavity of the spout to the maximum extent; high-pressure diesel oil is sealed in a cavity formed by the pyramidal surface of the pin valve and the seat surface of the pin valve body. The pin valve coupling, which can meet the requirement of the marine diesel engine on the pin value coupling of an oil atomizer, has the advantages of ingenious structure, small volume, good performance, low oil consumption, little discharge, strong reliability, little carbon deposit in the spout, long service life of the spout, etc.
Description
Technical field
The present invention relates to the marine diesel engine technical field, relate in particular to marine diesel 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 is about 0.004mm to 0.006mm, and surface roughness reaches Ra0.025 μ m.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.Injection diameter is generally about 0.5-1.0mm, is subjected to the effect of high pressure mist of oil in high-temperature work environment, and corrosion failure easily takes place in the spray orifice end, and influences the atomizing effect of fuel oil.The applying date is that " a kind of rotation needle-valve hole nozzle " (notification number is CN2413041Y) of the Chinese utility model patent ZL00206288.7 on March 22nd, 2000 just belongs to the oil sprayer of this class formation; It comprises plunger, plunger body, guide finger, rotary spool, valve body, oil pocket and spring, the tapering, lower end of valve body is provided with nozzle opening, spring is arranged on the plunger upper end, plunger body and valve body are located with locating stud, the convex body of plunger lower end is arranged in " bucket " shape structure of rotary spool upper end, is provided with oil duct in tapering, rotary spool lower end.It can't overcome the problems referred to above.
Summary of the invention
Technical problem to be solved by this invention is at above-mentioned prior art present situation, and delicate structure is provided, volume is little, performance good, oil consumption is low, discharging less, the marine diesel 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 present invention solves the problems of the technologies described above the technological scheme that is adopted: marine diesel guiding valve type pintle nozzle matching parts, comprise equipped mutually needle-valve body, needle-valve, thrust block, nozzle and fastening piece, wherein: the inner chamber of needle-valve body grinds and is combined with 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 nozzle is determined by fastening piece; Needle-valve is closed high-pressure oil passage can directly control the shut-off nozzle spray orifice, and can reduce residual fuel oil carbonization in the nozzle cavity and the nozzle spray orifice that results in blockage; Be sealed with high-pressure diesel in the cavity that the conical surface on the needle-valve and the seat surface on the needle-valve body constitute.
Concrete technical measures also comprise:
Above-mentioned nozzle blank is formed by the isobaric compacting of Co-based alloy powder heat, can guarantee effectively that nozzle satisfies job requirement, has hardness height, good toughness, characteristics such as high temperature resistant, corrosion-resistant.
The above-mentioned needle-valve and the matching gap of needle-valve body are in 0.01mm to 0.013mm scope, and the roughness of matching surface is in Ra0.015 μ m to Ra0.030 mu m range; The cylindricity that cooperates periphery is in 0.001mm to 0.003mm 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 0.001mm to 0.003mm scope; The matching gap of needle-valve and nozzle 4 is in 0.02mm to 0.04mm scope.
Preferable selection parameter is, the above-mentioned needle-valve and the matching gap of needle-valve body are 0.012mm, and the roughness of matching surface is Ra0.025 μ m; Cooperating the cylindricity of periphery is 0.002mm; 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 0.002mm; The matching gap of needle-valve and nozzle 4 is about 0.03mm.
Compared with prior art, the inner chamber of needle-valve body of the present invention grinds and is combined with 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 nozzle is determined by fastening piece; Needle-valve is closed high-pressure oil passage can directly control the shut-off nozzle spray orifice, and can reduce residual fuel oil carbonization in the nozzle cavity and the nozzle spray orifice that results in blockage; Be sealed with high-pressure diesel in the cavity that the conical surface on the needle-valve and the seat surface on the needle-valve body constitute.Its delicate structure, volume is little, performance good, oil consumption is low, the 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 vertical profile structural representation of the embodiment of the invention.
Embodiment
Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.
Structure of the present invention is seen shown in Figure 1.Marine diesel guiding valve type pintle nozzle matching parts, comprise equipped mutually needle-valve body 1, needle-valve 2, thrust block 3, nozzle 4 and fastening piece 5, wherein: the inner chamber of needle-valve body 1 grinds and is combined with 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 nozzle 4 is determined by fastening piece 5; Needle-valve 2 is closed high-pressure oil passage can directly control shut-off nozzle 4 spray orifices, and can reduce residual fuel oil carbonization in nozzle 4 cavitys and nozzle 4 spray orifices that result in blockage; Be sealed with high-pressure diesel in the cavity that seat surface on the conical surface on the needle-valve 2 and the needle-valve body 1 constitutes.Nozzle 4 blanks are formed by the isobaric compacting of Co-based alloy powder 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 the critical component needle-valve 2 and the matching gap of needle-valve body 1 are in 0.01mm to 0.013mm scope, and the roughness of matching surface is in Ra0.015 μ m to Ra0.030 mu m range; The cylindricity that cooperates periphery is in 0.001mm to 0.003mm 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 0.001mm to 0.003mm scope; The matching gap of needle-valve 2 and nozzle 4 is in 0.02mm to 0.04mm scope.
Preferable selection parameter is, needle-valve 2 is 0.012mm with the matching gap of needle-valve body 1, and the roughness of matching surface is Ra0.025 μ m; Cooperating the cylindricity of periphery is 0.002mm; 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 0.002mm; Needle-valve 2 is about 0.03mm with the matching gap of nozzle 4.
In sum, protection scope of the present invention is not limited to the foregoing description, still all should belong to interest field of the present invention as for the replacement of equivalent elements in this specification etc.
Claims (2)
1. marine diesel guiding valve type pintle nozzle matching parts, comprise equipped mutually needle-valve body (1), needle-valve (2), thrust block (3), nozzle (4) and fastening piece (5), it is characterized in that: the inner chamber of described needle-valve body (1) grinds and is combined with needle-valve (2), and the anterior front aperture through described needle-valve body (1) of 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; The mounting point of described nozzle (4) is determined by fastening piece (5); Described needle-valve (2) is closed high-pressure oil passage can directly control shut-off nozzle (4) spray orifice, and can reduce residual fuel oil carbonization in nozzle (4) cavity and the nozzle that results in blockage (4) spray orifice; Be sealed with high-pressure diesel in the cavity that seat surface on the conical surface on the described needle-valve (2) and the needle-valve body (1) constitutes; Described nozzle (4) blank 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) is in 0.01mm to 0.013mm scope, and the roughness of matching surface is in Ra0.015 μ m to Ra0.030 mu m range; The cylindricity that cooperates periphery is in 0.001mm to 0.003mm 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 0.001mm to 0.003mm scope; The matching gap of needle-valve (2) and nozzle (4) is in 0.02mm to 0.04mm scope.
2. marine diesel guiding valve type pintle nozzle matching parts according to claim 1 is characterized in that: described needle-valve (2) is 0.012mm with the matching gap of needle-valve body (1), and the roughness of matching surface is Ra0.025 μ m; Cooperating the cylindricity of periphery is 0.002mm; 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 0.002mm; Needle-valve (2) is about 0.03mm with the matching gap of nozzle (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100634590A CN101338721B (en) | 2008-08-07 | 2008-08-07 | Marine diesel guiding valve type pintle nozzle matching parts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100634590A CN101338721B (en) | 2008-08-07 | 2008-08-07 | Marine diesel guiding valve type pintle nozzle matching parts |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101338721A CN101338721A (en) | 2009-01-07 |
| CN101338721B true CN101338721B (en) | 2010-09-08 |
Family
ID=40212870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100634590A Expired - Fee Related CN101338721B (en) | 2008-08-07 | 2008-08-07 | Marine diesel guiding valve type pintle nozzle matching parts |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101338721B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102748178A (en) * | 2012-07-26 | 2012-10-24 | 余姚市舒春机械有限公司 | Marine diesel injector assembly |
| CN102748177B (en) * | 2012-07-26 | 2015-06-03 | 余姚市舒春机械有限公司 | Oil sprayer assembly of long-needle marine diesel engine |
| CN106845136A (en) * | 2017-02-21 | 2017-06-13 | 上海大学 | A kind of needle-valve body crush and grind accuracy prediction method based on SVMs |
| CN113339171B (en) * | 2021-05-31 | 2022-07-01 | 长春腾翔汽车零部件有限公司 | Oil nozzle for automobile engine |
-
2008
- 2008-08-07 CN CN2008100634590A patent/CN101338721B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101338721A (en) | 2009-01-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101338721B (en) | Marine diesel guiding valve type pintle nozzle matching parts | |
| CN101694195B (en) | Double-needle-valve matching part of marine diesel engine | |
| CN102400825A (en) | Cooling needle valve matching part for marine diesel engine | |
| CN201031756Y (en) | Marine high power diesel engine fuel oil injector assembly | |
| CN110131084B (en) | Valve rod coupling type high-pressure common rail fuel injector | |
| CN102979654B (en) | A kind of anti-carbon deposition cooling type pintle nozzle match-ing parts | |
| CN201461179U (en) | Slide valve type needle valve coupling of marine diesel engine oil sprayer assembly | |
| CN101694197A (en) | Split-type needle valve matching part | |
| CN104358645A (en) | Electromagnetic assisted heating type GDI (Gasoline Direct Injector) tar injection device | |
| CN201635894U (en) | Component of oil sprayer | |
| CN102748177B (en) | Oil sprayer assembly of long-needle marine diesel engine | |
| CN102748178A (en) | Marine diesel injector assembly | |
| CN209469527U (en) | A kind of electronic fuel injection and the fuel injector including it | |
| CN201521383U (en) | Hole-type fuel injection nozzle of diesel engine | |
| CN100334344C (en) | Multi-orifice pencil-style fuel injectors | |
| CN202012431U (en) | Dimethyl ether engine fuel supplying system and the fuel injector thereof | |
| CN104214034A (en) | L80MC low-speed diesel engine carbon-deposit-resisting nozzle | |
| CN2849201Y (en) | Needle valve body having concave groove structure on seat surface | |
| CN201031757Y (en) | Fuel injector assembly for diesel engine | |
| CN219795427U (en) | Needle valve coupling piece of fuel injection valve of marine low-speed diesel engine | |
| CN2906110Y (en) | Multi-squirt-hole pencil type oil injector | |
| CN1668841A (en) | Injection valve | |
| CN201437753U (en) | Nickel-base alloy nozzle of needle valve matching parts of marine diesel engine | |
| CN205503332U (en) | Jam type diesel engine fuel sprayer is prevented to built -in two gerar grinding | |
| CN201007251Y (en) | Pin valve body with seat face stepdouble cones structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| 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: 20100908 Termination date: 20150807 |
|
| EXPY | Termination of patent right or utility model |