CN102748178A - Marine diesel injector assembly - Google Patents
Marine diesel injector assembly Download PDFInfo
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- CN102748178A CN102748178A CN2012102610309A CN201210261030A CN102748178A CN 102748178 A CN102748178 A CN 102748178A CN 2012102610309 A CN2012102610309 A CN 2012102610309A CN 201210261030 A CN201210261030 A CN 201210261030A CN 102748178 A CN102748178 A CN 102748178A
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- valve
- needle valve
- inner needle
- oil
- marine diesel
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Abstract
The invention discloses a marine diesel injector assembly, which comprises an oil injector body internally provided with a cavity pipeline, wherein a check way is arranged in a back cavity of the oil injector body, the check valve comprises an inner needle valve, an inner needle valve sleeve, a first thrust seat and a first spring, the inner needle valve is sleeved in the inner needle valve sleeve, a front conical surface of the inner needle valve is tightly matched with the inner needle valve sleeve, the first thrust seat is provided with an oil return hole, the first thrust seat is matched with the inner needle valve through the first spring, a nozzle is arranged at the front end of the oil injector body, and a stop valve tightly matched with the nozzle is inserted into the nozzle. Through the check valve, the fuel oil is discharged out of the body and is recycled, the operating ambient temperature is reduced, and the oil consumption is reduced; a needle valve assembly is designed to a long needle valve, the end face of the needle valve extends into an inner hole of the nozzle, the residual fuel oil is discharge out of the body at the tail of each atomizing, so that the accumulated carbon is effectively avoided. The marine diesel injector assembly, provided by the invention, has the advantages of good performance, low oil consumption, less accumulated carbon, high service life, strong reliability and the like.
Description
Technical field
The present invention relates to the marine diesel engine technical field, relate in particular to a kind of marine diesel engine fuel injector assembly.
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 fixed middle good inflammable mixture that forms of burning.The quality of oil sprayer performance directly influences the working life of combustion performance, oil consumption and the diesel engine of diesel engine.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.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 pass through correct grinding and form with mutual bedding-in.
Existing injector assembly atomizing back Fuel Remained can't reclaim use, makes operating ambient temperature high, and Fuel Remained can't be recycled and also cause waste.Simultaneously, existing injector assembly ubiquity nozzle carbon distribution is serious, the problem that the life-span is not high.
Summary of the invention
Technical problem to be solved by this invention is to the above-mentioned state of the art, provides that a kind of performance is good, consumption oil is low, carbon distribution is few, the life-span is high, the marine diesel engine fuel injector assembly of good reliability.
The present invention solves the problems of the technologies described above the technological scheme that is adopted:
A kind of marine diesel engine fuel injector assembly is established the oil injector body of cavity pipeline, wherein in comprising; 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 first spring, and the inner needle valve cover fits in the inner needle valve sleeve; And this inner needle valve front end conical surface and inner needle valve sleeve closely cooperate, and first thrust block is provided with the spill port that is used to reclaim remaining fluid, and this first thrust block matches with inner needle valve through first spring; The oil injector body front end is provided with nozzle, and nozzle interior is inserted with stop valve close-fitting with it, and fluid gets into safety check from oil injector body; The oil pressure that produces compresses described first spring, and inner needle valve is separated with the inner needle valve sleeve, and fluid is through behind the safety check; Oil pressure descends in the safety check; Described first recoil of spring, inner needle valve and inner needle valve sleeve fit tightly once more, accomplish and once beat.
For optimizing technique scheme, the measure that the present invention takes also comprises:
In the above-mentioned oil injector body front cavity needle-valve body close-fitting with it is installed, the needle-valve body front end is fixedly connected with nozzle.
Above-mentioned needle-valve body inside is established cavity and is set with outer needle-valve, and the outer needle-valve front end conical surface and needle-valve body closely cooperate.
Above-mentioned outer needle-valve is connected with second thrust block.
The second above-mentioned thrust block rear portion is connected with the fork-shaped pushing block, and the fork-shaped pushing block is fixedly connected with the spring seat that matches with second spring, behind second spring pad is installed, and the pad rear portion is provided with compression spring.
There is track bar to be connected between the second above-mentioned thrust block and the safety check, is provided with oil duct in the middle of the track bar.
Be arranged with injector head outside the 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.
Above-mentioned needle-valve body is slidingly matched the gap in 0.003mm to 0.005mm scope with outer needle-valve outer round surface; The matching surface roughness reaches Ra0.05 μ m; 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 marine diesel engine fuel injector assembly of the present invention is established the oil injector body of cavity pipeline in comprising; Wherein, 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 first spring; The inner needle valve cover fits in the inner needle valve sleeve; And this inner needle valve front end conical surface and inner needle valve sleeve closely cooperate, and first thrust block is provided with spill port, and this first thrust block matches with inner needle valve through first spring; The oil injector body front end is provided with nozzle, and nozzle interior is inserted with stop valve close-fitting with it.The present invention can get rid of the fuel oil after at every turn atomizing external through the spill port on the safety check, recycle, and has not only reduced operating ambient temperature, has more practiced thrift resource, has reduced oil consumption; The needle-valve of pintle nozzle match-ing parts of the present invention is designed to needle-valve+stop valve and is used, and can the residual fuel oil in the nozzle be excreted at each atomizing end, can effectively prevent carbon distribution, has prolonged the oil sprayer life-span; Injector assembly project organization of the present invention simple maintains easily.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention;
Fig. 2 is the check valve structure schematic representation.
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are described in further detail.
Fig. 1 is extremely shown in Figure 2 to be structural representation of the present invention.
Reference character wherein is: 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, stop valve 9, needle-valve body 10, outer needle-valve 11, second thrust block 12, fork-shaped pushing block 13, second spring 14, spring seat 15, pad 16, compression spring 17, track bar 18, oil duct 19, fuel inlet 21, locking cap 22, annular groove 23, O-ring seals 24.
As shown in Figure 1, a kind of marine diesel engine fuel injector assembly of the present invention is established the oil injector body 1 of cavity pipeline in comprising; Wherein, in the oil injector body 1 rear portion cavity safety check 2 is installed, safety check 2 includes inner needle valve 3, inner needle valve sleeve 4, first thrust block 5 and first spring 6; Inner needle valve 3 covers fit in the inner needle valve sleeve 4; And these inner needle valve 3 front end conical surfaces and inner needle valve sleeve 4 closely cooperate, and first thrust block 5 is provided with the spill port 7 that is used to reclaim remaining fluid, and this first thrust block 5 matches with inner needle valve 3 through first spring 6; Oil injector body 1 front end is provided with nozzle 8, and nozzle 8 inside are inserted with stop valve 9 close-fitting with it.Fluid gets into safety check 2 from oil injector body 1; The oil pressure that produces compresses described first spring 6, and inner needle valve 3 is separated with inner needle valve sleeve 4, and fluid is through behind the safety check 2; Oil pressure descends in the safety check 2; 6 resiliences of described first spring, inner needle valve 3 fits tightly with inner needle valve sleeve 4 once more, accomplishes and once beats.
Among the embodiment, needle-valve body 10 close-fitting with it is installed in oil injector body 1 front cavity, needle-valve body 10 front ends are fixedly connected with nozzle 8.
Among the embodiment, needle-valve body 10 inside are established cavity and are set with outer needle-valve 11, and the outer needle-valve 11 front end conical surfaces and needle-valve body 10 closely cooperate.
Among the embodiment, outer needle-valve 11 is connected with second thrust block 12.
Among the embodiment, second thrust block, 12 rear portions are connected with fork-shaped pushing block 13, and fork-shaped pushing block 13 is equipped with pad 16 after being fixedly connected with spring seat 15, the second springs 14 that match with second spring 14, and pad 16 rear portions are provided with compression spring 17.
Among the embodiment, there is track bar 18 to be connected between second thrust block 12 and the safety check 2, is provided with oil ducts 19 in the middle of the track bar 18.
Among the embodiment, oil injector body is arranged with injector head 20 outside 1 rear portion, and these injector head 20 rear portions are provided with fuel inlet 21.
Among the embodiment, injector head 20 front portions are fixedly connected with locking cap 22, and match with oil injector body 1 in these locking cap 22 front portions.
Among the embodiment, oil injector body 1 is provided with annular groove 23 with injector head 20 peripheries, and is provided with O-ring seals 24 in this annular groove.
Among the embodiment; Needle-valve body 10 is slidingly matched the gap in 0.003mm to 0.005mm scope with outer needle-valve 11 outer round surface; The matching surface roughness reaches Ra0.05 μ m, and 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 gets into injector assembly through fuel inlet 21, when fuel oil arrives inner needle valve 3 with inner needle valve sleeve 4 places, is that sealing is fitted because inner needle valve 3 cooperates the conical surface with inner needle valve sleeve 4; Fuel oil can't pass through, and moves thereby drive inner needle valve 3, after to a certain degree backward; Cause because of first spring, 6 active forces cooperates inner needle valve 3 again with inner needle valve sleeve 4 conical surface seals, so just accomplish the take-off process of an inner needle valve 3; Fuel oil is through behind the safety check 2; Through the oil duct 19 of track bar 18, get into pintle nozzle match-ing parts, the outer needle-valve 11 in the pintle nozzle match-ing parts also is through conical surface seal with needle-valve body 10; Only its take-off will reach the effect of take-off by forked type pushing block 13 through the track bar 18 second outer springs 14.Last fuel oil arrives nozzle 8, and the tiny spray orifice through nozzle 8 heads injects fuel in the firing chamber.
For guaranteeing to improve its working life in the injector assembly high-temperature work environment, in injector assembly, be designed with safety check 2 assemblies, through safety check 2 assemblies fuel oil is got rid of externally, recycle.Well alleviate the working environment of high temperature, improved its working life greatly.
The pintle nozzle match-ing parts needle-valve is designed to the minute hand valve, and the needle-valve end face puts in nozzle 8 endoporus, can the residual fuel oil in the nozzle be excreted at each atomizing end, can effectively prevent carbon distribution.
For making things convenient for the easy to maintenance of injector assembly, compare with injector assembly in the past, between pintle nozzle match-ing parts and oil injector body, be designed with the lift confinement block, effectively control flow rate is convenient for changing, and improves working life.
Than higher, the present invention adopts high-precision three station grinding machines to pintle nozzle match-ing parts to the concentricity requirement of endoporus, sealing cone, seal face, to endoporus, sealing cone, seal face is disposable processes, and guarantees concentricity requirement.
Compared with prior art, the present invention has that performance is good, low, the advantages such as carbon distribution is few, the life-span is high, good reliability of consumption oil, can satisfy the requirement of marine diesel engine to the fuel injector needle valve coupling.
Claims (10)
1. marine diesel engine fuel injector assembly is established the oil injector body (1) of cavity pipeline in comprising, it is characterized in that: in the cavity of described oil injector body (1) rear portion safety check (2) is installed; Described safety check (2) includes inner needle valve (3), inner needle valve sleeve (4), first thrust block (5) and first spring (6), and described inner needle valve (3) cover fits in the inner needle valve sleeve (4), and this inner needle valve (3) front end conical surface and inner needle valve sleeve (4) closely cooperate; Described first thrust block (5) is provided with the spill port (7) that is used to reclaim remaining fluid; And this first thrust block (5) matches with inner needle valve (3) through first spring (6), and described oil injector body (1) front end is provided with nozzle (8), and described nozzle (8) inside is inserted with stop valve close-fitting with it (9); Fluid gets into safety check (2) from oil injector body (1); The oil pressure that produces compresses described first spring (6), and inner needle valve (3) is separated with inner needle valve sleeve (4), and fluid is through behind the safety check (2); The interior oil pressure of safety check (2) descends; Described first spring (6) resilience, inner needle valve (3) fits tightly with inner needle valve sleeve (4) once more, accomplishes and once beats.
2. a kind of marine diesel engine fuel injector assembly according to claim 1 is characterized in that: in described oil injector body (1) front cavity needle-valve body close-fitting with it (10) is installed, described needle-valve body (10) front end is fixedly connected with nozzle (8).
3. a kind of marine diesel engine fuel injector assembly according to claim 2 is characterized in that: described needle-valve body (10) inside is established cavity and is set with outer needle-valve (11), and described outer needle-valve (11) the front end conical surface and needle-valve body (10) closely cooperate.
4. a kind of marine diesel engine fuel injector assembly according to claim 3 is characterized in that: described outer needle-valve (11) is connected with second thrust block (12).
5. a kind of marine diesel engine fuel injector assembly according to claim 4; It is characterized in that: described 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) that matches with second spring (14); Pad (16) is installed behind described second spring (14), and described pad (16) rear portion is provided with compression spring (17).
6. a kind of marine diesel engine fuel injector assembly according to claim 5 is characterized in that: have track bar (18) to be connected between described second thrust block (12) and the safety check (2), be provided with oil duct (19) in the middle of the described track bar (18).
7. a kind of marine diesel engine fuel injector assembly according to claim 6 is characterized in that: described oil injector body (1) is arranged with injector head (20) outside the rear portion, and this injector head (20) rear portion is provided with fuel inlet (21).
8. a kind of marine diesel engine fuel injector assembly according to claim 7 is characterized in that: 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.
9. a kind of marine diesel engine fuel injector assembly according to claim 8 is characterized in that: 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.
10. a kind of marine diesel engine fuel injector assembly according to claim 9; It is characterized in that: described needle-valve body (10) is slidingly matched the gap in 0.003mm to 0.005mm scope with outer needle-valve (11) outer round surface; The matching surface roughness reaches Ra0.05 μ m; 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102610309A CN102748178A (en) | 2012-07-26 | 2012-07-26 | Marine diesel injector assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102610309A CN102748178A (en) | 2012-07-26 | 2012-07-26 | Marine diesel injector assembly |
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| Publication Number | Publication Date |
|---|---|
| CN102748178A true CN102748178A (en) | 2012-10-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012102610309A Pending CN102748178A (en) | 2012-07-26 | 2012-07-26 | Marine diesel injector assembly |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN106368874A (en) * | 2016-09-12 | 2017-02-01 | 上海中船三井造船柴油机有限公司 | Oil sprayer of low-speed diesel engine |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993007386A1 (en) * | 1991-10-04 | 1993-04-15 | Man B&W Diesel A/S | A fuel injector for internal combustion engines |
| WO1997048901A1 (en) * | 1996-06-20 | 1997-12-24 | Man B & W Diesel A/S | A fuel injector for an internal combustion engine |
| 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 |
| CN101694195A (en) * | 2009-08-20 | 2010-04-14 | 余姚市舒春机械有限公司 | Double-needle-valve matching part of marine diesel engine |
-
2012
- 2012-07-26 CN CN2012102610309A patent/CN102748178A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993007386A1 (en) * | 1991-10-04 | 1993-04-15 | Man B&W Diesel A/S | A fuel injector for internal combustion engines |
| WO1997048901A1 (en) * | 1996-06-20 | 1997-12-24 | Man B & W Diesel A/S | A fuel injector for an internal combustion engine |
| 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 |
| CN101694195A (en) * | 2009-08-20 | 2010-04-14 | 余姚市舒春机械有限公司 | Double-needle-valve matching part of marine diesel engine |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN106368874A (en) * | 2016-09-12 | 2017-02-01 | 上海中船三井造船柴油机有限公司 | Oil sprayer of low-speed diesel engine |
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Application publication date: 20121024 |