CN102748177B - Oil sprayer assembly of long-needle marine diesel engine - Google Patents
Oil sprayer assembly of long-needle marine diesel engine Download PDFInfo
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- CN102748177B CN102748177B CN201210261027.7A CN201210261027A CN102748177B CN 102748177 B CN102748177 B CN 102748177B CN 201210261027 A CN201210261027 A CN 201210261027A CN 102748177 B CN102748177 B CN 102748177B
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Abstract
The invention relates to an oil sprayer assembly of a long-needle marine diesel engine, which comprises an oil sprayer body provided with a cavity body pipeline in interior thereof, wherein the front part of the oil sprayer body is provided with a nozzle; a needle valve body is mounted in the front part cavity of the oil sprayer body and is closely matched with the front part cavity of the oil sprayer body; a long-needle outer needle valve is sleeved in the needle valve body and is closely matched with the needle valve body; the head part of the long-needle outer needle valve is extended into the nozzle; a check valve is mounted in the back part cavity body of the oil sprayer body; the check valve comprises an inner needle valve, an inner needle valve sleeve, a first thrust base and a first spraying; the inner needle valve is sleeved in the inner needle valve sleeve; the front end conical surface of the inner needle valve is closely matched with the inner needle valve sleeve; the first thrust base is provided with an oil return hole; the first thrust base is matched with the inner needle valve through the first spraying; the outer needle valve is designed as the long-needle outer needle valve and is extended into the nozzle; residue fuel oil can be discharged out of the nozzle in the end of each atomization so as to prevent carbon deposition effectively; the fuel oil is discharged by the oil return hole on the check valve component and can be used circularly, thereby reducing oil consumption.
Description
Technical field
The present invention relates to Marine Diesels field, particularly relate to a kind of minute hand formula marine diesel engine fuel injector assembly.
Background technique
Oil sprayer is the important composition parts of diesel engine, and its major function is atomized by certain requirement by the high-pressure diesel from Injection Pump, and is distributed to the good inflammable mixture of the fixed middle formation of burning.The quality of oil sprayer performance directly affects the working life of the combustion performance of diesel engine, oil consumption and diesel engine.Pintle nozzle match-ing parts as injector assembly core is a secondary precision pair, and high-precision being slidably matched is done with needle-valve body inner periphery in the guide cylinder surface on needle-valve top.Seat surface on cone match needle-valve body in the middle part of needle-valve seals, and when oil pressure reaches cracking pressure, the spray orifice of nozzle is opened in needle-valve take-off.Guide cylinder face on pintle nozzle match-ing parts and sealing cone must form through fine grinding and mutual bedding-in.
Residual fuel oil in existing injector assembly atomization rear nozzle cannot excrete, and cause carbon distribution, working life shortens; Meanwhile, in injector assembly, Fuel Remained cannot be recycled, and causes waste.
Summary of the invention
Technical problem to be solved by this invention is for the above-mentioned state of the art, provides the minute hand formula marine diesel engine fuel injector assembly that a kind of performance is good, oil consumption is low, carbon distribution is few, the life-span is high, reliability is strong.
The present invention solves the problems of the technologies described above adopted technological scheme:
A kind of minute hand formula marine diesel engine fuel injector assembly, the oil injector body of cavity pipeline is established in comprising, wherein, oil injector body front portion is provided with nozzle, and in this oil injector body front cavity, needle-valve body close-fitting with it is installed, needle-valve body internal sleeve is provided with the outer needle-valve of minute hand formula close-fitting with it, the outer needle-valve head minute hand of minute hand formula extend in nozzle, in the cavity of oil injector body rear portion, safety check is installed, safety check includes inner needle valve, inner needle valve sleeve, first thrust block and the first spring, inner needle valve cover fits in inner needle valve sleeve, and this inner needle valve front end conical surface and inner needle valve sleeve closely cooperate, first thrust block is provided with spill port, and this first thrust block is matched with inner needle valve by the first spring, at the end of each oil injector body is atomization, head minute hand stretches in nozzle and is excreted by the residual fuel oil in nozzle, prevent carbon distribution.
For optimizing technique scheme, the measure that the present invention takes also comprises:
In the middle part of the outer needle-valve of above-mentioned minute hand formula, the conical surface and needle-valve body closely cooperate, and needle-valve body front end is fixedly connected with nozzle.
The outer needle-valve of above-mentioned minute hand formula is connected with the second thrust block.
The second above-mentioned thrust block rear portion is connected with fork-shaped pushing block, and fork-shaped pushing block is fixedly connected with the spring seat matched with the second spring, is provided with pad after the second spring.
The second above-mentioned thrust block is connected with there being track bar between safety check, is provided with oil duct in the middle of track bar.
Be arranged with injector head outside above-mentioned oil injector body rear portion, and this injector head rear portion is provided with fuel inlet.
Above-mentioned injector head front portion is fixedly connected with locking cap, and matches with oil injector body in this locking cap front portion.
Above-mentioned oil injector body and injector head periphery are provided with annular groove, and are provided with O-ring seals in this annular groove.
The anterior side of above-mentioned oil injector body is provided with pin.
The middle part conical surface of the outer needle-valve of above-mentioned needle-valve body and minute hand formula be slidably matched gap in 0.003mm to 0.005mm scope, matching surface roughness reaches Ra0.05 μm, cylindricity is 0.002mm, and the circular runout amplitude of the sealing cone of needle-valve body is in 0.001mm to 0.003mm scope.
Compared with prior art, a kind of minute hand formula marine diesel engine fuel injector assembly of the present invention, the oil injector body of cavity pipeline is established in comprising, wherein, oil injector body front portion is provided with nozzle, and in this oil injector body front cavity, needle-valve body close-fitting with it is installed, needle-valve body internal sleeve is provided with the outer needle-valve of minute hand formula close-fitting with it, the outer needle-valve head minute hand of minute hand formula extend in nozzle, in the cavity of oil injector body rear portion, safety check is installed, safety check includes inner needle valve, inner needle valve sleeve, first thrust block and the first spring, inner needle valve cover fits in inner needle valve sleeve, and this inner needle valve front end conical surface and inner needle valve sleeve closely cooperate, first thrust block is provided with spill port, and this first thrust block is matched with inner needle valve by the first spring.The outer needle-valve of minute hand formula of the present invention stretches into nozzle interior, can be atomized end at every turn, excreted by the residual fuel oil in nozzle, effectively can prevent carbon distribution; Fuel oil after each atomization is got rid of external by the spill port on safety check, recycles, not only reduces operating ambient temperature, more saved resource, reduced oil consumption.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention;
Fig. 2 is check valve structure schematic diagram;
Fig. 3 is the structural representation of outer needle-valve.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are described in further detail.
Fig. 1 is to Figure 3 shows that structural representation of the present invention.
Reference character is wherein: oil injector body 1, safety check 2, inner needle valve 3, inner needle valve sleeve 4, first thrust block 5, first spring 6, spill port 7, nozzle 8, head minute hand 9, needle-valve body 10, minute hand formula outer needle-valve 11, second thrust block 12, fork-shaped pushing block 13, second spring 14, spring seat 15, pad 16, pin 17, track bar 18, oil duct 19, fuel inlet 21, locking cap 22, annular groove 23, O-ring seals 24, the middle part conical surface 25.
As shown in Figure 1, a kind of minute hand formula marine diesel engine fuel injector assembly of the present invention, the oil injector body 1 of cavity pipeline is established in comprising, wherein, oil injector body 1 front portion is provided with nozzle 8, and in this oil injector body 1 front cavity, needle-valve body 10 close-fitting with it is installed, needle-valve body 10 internal sleeve is provided with the outer needle-valve 11 of minute hand formula close-fitting with it, the outer needle-valve 11 head minute hand 9 of minute hand formula extend in nozzle 8, in the cavity of oil injector body 1 rear portion, safety check 2 is installed, safety check 2 includes inner needle valve 3, inner needle valve sleeve 4, first thrust block 5 and the first spring 6, inner needle valve 3 cover fits in inner needle valve sleeve 4, and this inner needle valve 3 front end conical surface and inner needle valve sleeve 4 closely cooperate, first thrust block 5 is provided with spill port 7, and this first thrust block 5 is matched with inner needle valve 3 by the first spring 6, at the end of each oil injector body 1 is atomization, head minute hand 9 stretches in nozzle 8 and is excreted by the residual fuel oil in nozzle, prevent carbon distribution.
In embodiment, in the middle part of the outer needle-valve 11 of minute hand formula, the conical surface 25 closely cooperates with needle-valve body 10, and needle-valve body 10 front end is fixedly connected with nozzle 8.
In embodiment, the outer needle-valve 11 of minute hand formula is connected with the second thrust block 12.
In embodiment, the second thrust block 12 rear portion is connected with fork-shaped pushing block 13, and fork-shaped pushing block 13 is provided with pad 16 after being fixedly connected with spring seat 15, second spring 14 matched with the second spring 14.
In embodiment, the second thrust block 12 is connected with there being track bar 18 between safety check 2, is provided with oil duct 19 in the middle of track bar 18.
In embodiment, oil injector body 1 is arranged with injector head 20 outside rear portion, and this injector head 20 rear portion is provided with fuel inlet 21.
In embodiment, injector head 20 front portion is fixedly connected with locking cap 22, and matches with oil injector body 1 in this locking cap 22 front portion.
In embodiment, oil injector body 1 and injector head 20 periphery are provided with annular groove 23, and are provided with O-ring seals 24 in this annular groove.
In embodiment, the anterior side of oil injector body 1 is provided with pin 17.
In embodiment, the middle part conical surface 25 of needle-valve body 10 and the outer needle-valve 11 of minute hand formula be slidably matched gap in 0.003mm to 0.005mm scope, matching surface roughness reaches Ra0.05 μm, cylindricity is 0.002mm, and the circular runout amplitude of the sealing cone of needle-valve body 10 is in 0.001mm to 0.003mm scope.
Fuel oil enters injector assembly by fuel inlet 21, when fuel oil arrives inner needle valve 3 with inner needle valve sleeve 4 place, because inner needle valve 3 coordinates the conical surface to be seal to fit with inner needle valve sleeve 4, fuel oil cannot pass through, thus drive inner needle valve 3 to move backward, to a certain extent, because of the cause of the first spring 6 active force, inner needle valve 3 is coordinated with inner needle valve sleeve 4 conical surface seal again, so just complete the take-off process of an inner needle valve 3, fuel oil is by after safety check 2, by the oil duct 19 of track bar 18, enter pintle nozzle match-ing parts, the outer needle-valve 11 of minute hand formula in pintle nozzle match-ing parts is also pass through conical surface seal with needle-valve body 10, only its take-off will by forked type pushing block 13, the effect of take-off is reached by the second spring 14 outside track bar 18, last fuel oil arrives nozzle 8 through head minute hand 9, by the tiny spray orifice of nozzle 8, inject fuel in firing chamber.
In order to effectively solve the problem of nozzle deposit carbon, outer needle-valve is designed to the outer needle-valve 11 of minute hand formula, stretches in nozzle 8 endoporus, can be atomized end at every turn, excreted by the residual fuel oil in nozzle, prevent carbon distribution; For ensureing, in injector assembly high-temperature work environment, to improve its working life, be designed with safety check 2 assembly in injector assembly, fuel oil is got rid of external by the spill port 7 on safety check 2 assembly, recycle, well alleviate the working environment of high temperature, greatly improve its working life; Easy to maintenance for convenience of injector assembly, compared with injector assembly in the past, be designed with lift confinement block, effectively control flow, be convenient for changing, improve working life between pintle nozzle match-ing parts and oil injector body 1; The concentricity requirement of pintle nozzle match-ing parts to endoporus, sealing cone, seal face is higher, and the present invention adopts high-precision three station grinding machines, and to endoporus, sealing cone, seal face is disposable processes, and ensures concentricity requirement.Compared with prior art, the present invention has the advantages such as performance is good, oil consumption is low, carbon distribution is few, the life-span is high, reliability is strong, can meet the requirement of marine diesel engine to Performance of Fuel Injection Nozzle.
Claims (1)
1. a minute hand formula marine diesel engine fuel injector assembly, the oil injector body (1) of cavity pipeline is established in comprising, described oil injector body (1) front portion is provided with nozzle (8), and in this oil injector body (1) front cavity, needle-valve body close-fitting with it (10) is installed, described needle-valve body (10) internal sleeve is provided with the outer needle-valve (11) of minute hand formula close-fitting with it, outer needle-valve (11) the head minute hand (9) of described minute hand formula extend in nozzle (8), in described oil injector body (1) rear portion cavity, safety check (2) is installed, described safety check (2) includes inner needle valve (3), inner needle valve sleeve (4), first thrust block (5) and the first spring (6), described inner needle valve (3) cover fits in inner needle valve sleeve (4), and this inner needle valve (3) the front end conical surface and inner needle valve sleeve (4) closely cooperate, and this first thrust block (5) is matched with inner needle valve (3) by the first spring (6), at the end of each oil injector body (1) is atomization, described head minute hand (9) stretches in nozzle (8) and is excreted by the residual fuel oil in nozzle, prevent carbon distribution, the outer needle-valve (11) the middle part conical surface (25) of described minute hand formula closely cooperates with needle-valve body (10), and described needle-valve body (10) front end is fixedly connected with nozzle (8), the outer needle-valve (11) of described minute hand formula is connected with the second thrust block (12), described the second thrust block (12) rear portion is connected with fork-shaped pushing block (13), described fork-shaped pushing block (13) is fixedly connected with the spring seat (15) matched with the second spring (14), is provided with pad (16) after described the second spring (14), the circular runout amplitude of the sealing cone of needle-valve body (10) is in 0.001mm to 0.003mm scope, described the second thrust block (12) is connected with there being track bar (18) between safety check (2), is provided with oil duct (19) in the middle of described track bar (18), be arranged with injector head (20) outside described oil injector body (1) rear portion, and this injector head (20) rear portion is provided with fuel inlet (21), described injector head (20) front portion is fixedly connected with locking cap (22), and matches with oil injector body (1) in this locking cap (22) front portion, described oil injector body (1) and injector head (20) periphery are provided with annular groove (23), and are provided with O-ring seals (24) in this annular groove, described oil injector body (1) anterior side is provided with pin (17), it is characterized in that: described the first thrust block (5) is provided with spill port (7), the middle part conical surface (25) of the outer needle-valve (11) of described needle-valve body (10) and minute hand formula be slidably matched gap in 0.003mm to 0.005mm scope, matching surface roughness reaches Ra0.05 μm, cylindricity is 0.002mm, fuel oil after each atomization is excreted by the spill port on safety check, recycles, lift confinement block is designed with between pintle nozzle match-ing parts and oil injector body, adopt high-precision three station grinding machines, to endoporus, sealing cone, seal face is disposable processes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210261027.7A CN102748177B (en) | 2012-07-26 | 2012-07-26 | Oil sprayer assembly of long-needle marine diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210261027.7A CN102748177B (en) | 2012-07-26 | 2012-07-26 | Oil sprayer assembly of long-needle marine diesel engine |
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| Publication Number | Publication Date |
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| CN102748177A CN102748177A (en) | 2012-10-24 |
| CN102748177B true CN102748177B (en) | 2015-06-03 |
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| CN201210261027.7A Active CN102748177B (en) | 2012-07-26 | 2012-07-26 | Oil sprayer assembly of long-needle marine diesel engine |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105275696A (en) * | 2015-11-12 | 2016-01-27 | 余姚市舒春机械有限公司 | High-power diesel engine injection device for ship |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201031756Y (en) * | 2007-05-16 | 2008-03-05 | 余姚市舒春机械有限公司 | Marine high power diesel engine fuel oil injector assembly |
| CN101338721A (en) * | 2008-08-07 | 2009-01-07 | 余姚市舒春机械有限公司 | Marine diesel guiding valve type pintle nozzle matching parts |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK167502B1 (en) * | 1991-10-04 | 1993-11-08 | Man B & W Diesel Gmbh | FUEL ENGINE FOR COMBUSTION ENGINES |
| DK174075B1 (en) * | 1996-06-20 | 2002-05-21 | Man B & W Diesel As | Fuel injector for an internal combustion engine |
| CN101694195B (en) * | 2009-08-20 | 2011-09-28 | 余姚市舒春机械有限公司 | Double-needle-valve matching part of marine diesel engine |
| CN201925070U (en) * | 2010-12-31 | 2011-08-10 | 余姚市舒春机械有限公司 | Fuel injector assembly for marine diesel engine |
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2012
- 2012-07-26 CN CN201210261027.7A patent/CN102748177B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201031756Y (en) * | 2007-05-16 | 2008-03-05 | 余姚市舒春机械有限公司 | Marine high power diesel engine fuel oil injector assembly |
| CN101338721A (en) * | 2008-08-07 | 2009-01-07 | 余姚市舒春机械有限公司 | Marine diesel guiding valve type pintle nozzle matching parts |
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| CN102748177A (en) | 2012-10-24 |
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