CN201031756Y - Marine high power diesel engine fuel oil injector assembly - Google Patents
Marine high power diesel engine fuel oil injector assembly Download PDFInfo
- Publication number
- CN201031756Y CN201031756Y CNU2007201092947U CN200720109294U CN201031756Y CN 201031756 Y CN201031756 Y CN 201031756Y CN U2007201092947 U CNU2007201092947 U CN U2007201092947U CN 200720109294 U CN200720109294 U CN 200720109294U CN 201031756 Y CN201031756 Y CN 201031756Y
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- valve
- injector
- spring
- inner needle
- needle valve
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Abstract
The utility model discloses a marine high-power diesel engine injector assembly, including an injector head and an injector body. The cavity of the injector is provided with a nozzle, a stop valve, a needle valve matching part, a thrust rod, a furcated push block, a pressure-regulating spring, a spring base and a spring pad; the inside of the nozzle is provided with the stop valve and the nozzle is fixed in a jet hole surely arranged in a combustion chamber through a positioning pin; the cavity of the injector is provided with a check valve and the check valve is arranged between the spring pad and the injector head; the check valve is used as a delivery valve of injection pump, fully reducing the harmful effects of super high-voltage oil pipe volume on oil supply; the needle valve matching part is connected with the check valve through the thrust rod so as to form a high-pressure oil canal; the check valve includes a thrust block, an inner needle valve, an inner needle valve body and a spring; the conical surface of the lower end of the inner needle valve body is matched with the spherical surface on the upper end of the thrust rod; the spherical surface on the upper end of the thrust block is matched with the spherical surface on the lower end of the thrust rod. The stop valve rapidly falls back along with the outer needle valve so as to close the jet hole, thus preventing the fuel leakage.
Description
Technical field
The utility model relates to the diesel injection pump technical field, relates in particular to high-power diesel engine injector assembly peculiar to vessel.
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 into thinner elaioleucite by certain requirement, and it is distributed in the firing chamber forms good inflammable mixture with air.Basic demand to oil sprayer is: have certain jet pressure, certain range, certain spray angle, atomizing is good, oil spout ends rapidly oil-break and does not have weeping.At present, diesel engine often adopts close fuel injector, and promptly when not oil spout, spray orifice is closed by the needle-valve that compressed by brute spring, and the oil pocket of oil sprayer does not communicate with the firing chamber.For high-power diesel engine peculiar to vessel, excessive high-pressure oil pipe volume can exert an influence to fuel supply rate curve.
The needle-valve of oil sprayer and needle-valve body are secondary precision pairs, are called pintle nozzle match-ing parts.The guide cylinder surface on needle-valve top is slidingly matched as highi degree of accuracy with the inner cylindrical surface of needle-valve body, and its gap is about 0.002mm to 0.004mm, and surface roughness reaches Ra0.025 μ m.The conical surface at needle-valve middle part is the pressure-bearing conical surface, and its effect is to bear the end thrust that caused by oil pressure so that needle-valve rises.The sealing cone of needle-valve lower end is to realize the sealing of oil nozzle inner chamber.Corresponding fitting surface all guarantees its quality of fit on the guide cylinder face on needle-valve top and the sealing cone of lower end and the needle-valve body through grinding mutually behind the correct grinding again.
The pressure adjusting spring that is contained in oil injector body top is pressed on the sealing cone on the needle-valve needle-valve by tappet, and spray orifice is closed.The cracking pressure of needle-valve depends on the pretightening force of pressure adjusting spring.It can or regulate pad and regulate by pressure regulating screw.
At the oil sprayer duration of work, have the matching gap seepage of a small amount of diesel oil, but this part diesel oil can draw back filter cleaner or diesel fuel tanks by return tube to the matching surface lubricate from injector nozzle matching parts.Be the oil pumping system that " oil pumping system of scroll compressor " of the Chinese utility model patent ZL94106813.7 on June 24th, 1994 discloses a kind of scroll compressor as the applying date, its live axle can comprise an impeller.Impurity is imported in the storeroom that is formed by step and oil-feed tank.A plurality of apertures import impurity in the chamber and stop the impurity ejection when fluid move suddenly.There is the defective that volume is big, oil consumption is high, the oil supply position can not be adjusted in it.
Summary of the invention
Technical problem to be solved in the utility model is at above-mentioned deficiency, the high-power diesel engine injector assembly peculiar to vessel with check valve structure that provide jet pressure, atomize, oil consumption is low.Check valve structure has the effect that improves the oil sprayer fuel supply rate curve, makes jet pressure reach 350bar.
The utility model solves the problems of the technologies described above the technological scheme that is adopted: high-power diesel engine injector assembly peculiar to vessel, comprise equipped mutually injector head and oil injector body, and injector head has the connecting head of equipped high-pressure oil pipe; The oil injector body cavity is fitted with nozzle, stop valve, pintle nozzle match-ing parts, track bar, fork-shaped pushing block, pressure adjusting spring, spring seat, compression spring mutually; Join stop valve in the nozzle, nozzle is fixed for determining at the spray orifice of indoor location that burns through locating stud; The technical measures of taking comprise: the oil injector body cavity is fitted with safety check mutually, and safety check is between compression spring and injector head; Described pintle nozzle match-ing parts and safety check link by track bar and form high-pressure oil duct; Safety check comprises thrust block, inner needle valve, inner needle valve body and spring; The inner needle valve body lower end conical surface and track bar upper end sphere match and connect, and the outer step in inner needle valve body upper-end surface apical grafting thrust block upper end; Be arranged in the inner needle valve upper end-hole suit thrust block of inner needle valve body cavity, and butt spring between interior step in thrust block upper end and the inner needle valve upper-end surface; Thrust block upper end apical grafting injector head inwall; Thrust block upper end sphere and track bar lower end sphere match and connect.
The technical measures of taking also comprise:
Sealing is connected between above-mentioned injector head and the oil injector body 0 RunddichtringO.
Above-mentioned pintle nozzle match-ing parts comprises thrust block, needle-valve body, outer needle-valve, and thrust block adopts interference fit to be pressed on the needle-valve body; Stop valve adopts scyewed joint to be assemblied on the outer needle-valve; Pressure adjusting spring is through fork-shaped pushing block and the spring cooperation that is used to transmit pretightening force, and outer needle valve pressed is connected on the needle-valve body.
Above-mentioned injector head is provided with the return flow oil hole that leaks out between the parts matching gap in order to derive.
The lift of inner needle valve is 3.2mm in the above-mentioned safety check, and the lift of pintle nozzle match-ing parts China and foreign countries needle-valve is 2.7mm.
Be provided with compression spring between above-mentioned pressure adjusting spring upper end and the inner needle valve body lower end.
Compared with prior art, the utility model oil injector body cavity is fitted with safety check mutually, and safety check is between compression spring and injector head; Described pintle nozzle match-ing parts and safety check link by track bar and form high-pressure oil duct; Safety check comprises thrust block, inner needle valve, inner needle valve body and spring; The inner needle valve body lower end conical surface and track bar upper end sphere match and connect, and the outer step in inner needle valve body upper-end surface apical grafting thrust block upper end; Be arranged in the inner needle valve upper end-hole suit thrust block of inner needle valve body cavity, and butt spring between interior step in thrust block upper end and the inner needle valve upper-end surface; Thrust block upper end apical grafting injector head inwall; Thrust block upper end sphere and track bar lower end sphere match and connect.Oil sprayer is equipped with safety check, is equipped with stop valve in the nozzle, has improved the characteristic of fuel delivery and the service behaviour of oil sprayer, can reduce the oil consumption and the discharging of diesel engine, has satisfied the requirement of S50MC-C serial diesel engine to oil sprayer.
Description of drawings
Fig. 1 is the utility model embodiment's a vertical profile structural representation.
Embodiment
Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.
Structure of the present utility model is seen shown in Figure 1.High-power diesel engine injector assembly peculiar to vessel comprises equipped mutually injector head 1 and oil injector body 2, and injector head 1 has the connecting head of equipped high-pressure oil pipe; Oil injector body 2 cavitys are fitted with nozzle 3, stop valve 4, pintle nozzle match-ing parts 5, track bar 7, fork-shaped pushing block 8, pressure adjusting spring 9, spring seat 10, compression spring 11 mutually; Oil injector body cavity bottom is provided with the conical surface, matches with the conical surface on the nozzle 3, plays seal action, prevents that the inner fuel leakage of oil sprayer is in burning chamber of diesel engine.Join described stop valve 4 in the nozzle 3, nozzle 3 is fixed for determining at the spray orifice of indoor location that burns through locating stud 13; Oil injector body 2 cavitys wherein are fitted with safety check 6 mutually, and safety check 6 is between compression spring 11 and injector head 1; Described pintle nozzle match-ing parts 5 links by track bar 7 with safety check 6 and forms high-pressure oil duct; Described safety check 6 comprises thrust block 63, inner needle valve 62, inner needle valve body 61 and spring 64; The effect of safety check is equivalent to the outlet valve in the Injection Pump, can reduce the adverse effect of excessive high-pressure oil pipe volume to fuel supply rate curve fully.
The inner needle valve body 61 lower end conical surfaces and track bar 7 upper end spheres match and connect, and step outside apical grafting thrust block 63 upper ends, inner needle valve body 61 upper-end surface; Be arranged in the inner needle valve 62 upper end-hole suit thrust blocks 63 in inner needle valve body 61 chambeies, and butt spring 64 between step and inner needle valve 62 upper-end surfaces in thrust block 63 upper ends; Thrust block 63 upper end apical grafting injector head 1 inwalls; Thrust block 52 upper end spheres and track bar 7 lower end spheres match and connect.The good airproof performance of cone match.
Pintle nozzle match-ing parts 5 comprises thrust block 52, needle-valve body 51, outer needle-valve 53, and thrust block 52 adopts interference fit to be pressed on the needle-valve body 51; Stop valve 4 adopts scyewed joint to be assemblied on the outer needle-valve 53; Pressure adjusting spring 9 is through fork-shaped pushing block 8 and spring 64 cooperations that are used to transmit pretightening force, and outer needle-valve 53 is crimped on the needle-valve body 51.
Outer needle-valve 53 and needle-valve body 51 form by mutual bedding-in, can not exchange, and on the outer needle-valve 53 stop valve 4 are housed, and the sealing cone at stop valve 4 tops matches with nozzle 3.Oil spout at the end, stop valve 4 falls after rise rapidly with outer needle-valve, and spray orifice is closed, and stops oil spout.Owing to nozzle 3 inner spaces are remaining diesel oil is arranged, the rapid falling of stop valve has also prevented oil spout weeping at the end effectively.
The lift of inner needle valve 62 is 3.2mm in the safety check 6, and the lift of pintle nozzle match-ing parts 5 China and foreign countries' needle-valves 53 is 2.7mm.
Be provided with compression spring 11 between pressure adjusting spring 9 upper ends and inner needle valve body 61 lower ends.The cracking pressure of oil sprayer depends on the pretightening force of pressure adjusting spring 9, and it can be regulated by compression spring 11.
The key that the utility model is implemented is safety check, pintle nozzle match-ing parts and stop valve.Safety check and pintle nozzle match-ing parts are two secondary precision pairs, and wherein the matching gap of pintle nozzle match-ing parts is 0.007mm to 0.010mm, and the surface roughness of matching surface is Ra0.05 μ m.The matching gap of inner needle valve and inner needle valve sleeve is 0.007mm to 0.010mm in the safety check, and surface roughness is Ra0.05 μ m.Face of needle seating mutually to foreign round the circle requirement of beating is 0.003mm, and mesopore to foreign round the circle requirement of beating mutually is 0.003mm, and end face to foreign round the requirement of beating mutually is 0.002mm.After the injector assembly assembling is finished, carry out tests such as cracking pressure and atomization characteristics.
Though the utility model illustrates and describes by the reference preferred embodiment,, those skilled in the art should understand, and in the scope of claims, can do the various variation on form and the details.
Claims (6)
1. high-power diesel engine injector assembly peculiar to vessel comprises equipped mutually injector head (1) and oil injector body (2), and injector head (1) has the connecting head of equipped high-pressure oil pipe; Oil injector body (2) cavity is fitted with nozzle (3), stop valve (4), pintle nozzle match-ing parts (5), track bar (7), fork-shaped pushing block (8), pressure adjusting spring (9), spring seat (10), compression spring (11) mutually; Join described stop valve (4) in the nozzle (3), nozzle (3) is fixed for determining at the spray orifice of indoor location that burns through locating stud (13); It is characterized in that: described oil injector body (2) cavity is fitted with safety check (6) mutually, and safety check (6) is positioned between compression spring (11) and the injector head (1); Described pintle nozzle match-ing parts (5) links by track bar (7) with safety check (6) and forms high-pressure oil duct; Described safety check (6) comprises thrust block (63), inner needle valve (62), inner needle valve body (61) and spring (64); Described inner needle valve body (61) the lower end conical surface and track bar (7) upper end sphere match and connect, and the outer step in inner needle valve body (61) upper-end surface apical grafting thrust block (63) upper end; Be arranged in the described thrust block of inner needle valve (62) upper end-hole suit (63) in inner needle valve body (61) chamber, and the described spring of butt (64) between interior step in thrust block (63) upper end and inner needle valve (62) upper-end surface; Described thrust block (63) upper end apical grafting injector head (1) inwall; Described thrust block (52) upper end sphere and track bar (7) lower end sphere match and connect.
2. high-power diesel engine injector assembly peculiar to vessel according to claim 1 is characterized in that: sealing is connected between described injector head (1) and the oil injector body (2) O RunddichtringO (12).
3. high-power diesel engine injector assembly peculiar to vessel according to claim 1, it is characterized in that: described pintle nozzle match-ing parts (5) comprises thrust block (52), needle-valve body (51), outer needle-valve (53), and described thrust block (52) adopts interference fit to be pressed on the needle-valve body (51); Stop valve (4) adopts scyewed joint to be assemblied on the outer needle-valve (53); Described pressure adjusting spring (9) cooperates through fork-shaped pushing block (8) and the spring (64) that is used to transmit pretightening force, and described outer needle-valve (53) is crimped on the needle-valve body (51).
4. high-power diesel engine injector assembly peculiar to vessel according to claim 1 is characterized in that: described injector head (1) is provided with the return flow oil hole that leaks out between the parts matching gap in order to derive.
5. high-power diesel engine injector assembly peculiar to vessel according to claim 1 is characterized in that: the lift of inner needle valve (62) is 3.2mm in the described safety check (6), and the lift of pintle nozzle match-ing parts (5) China and foreign countries' needle-valves (53) is 2.7mm.
6. according to the described high-power diesel engine injector assembly peculiar to vessel of the arbitrary claim of claim 1 to 5, it is characterized in that: be provided with compression spring (11) between described pressure adjusting spring (9) upper end and inner needle valve body (61) lower end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201092947U CN201031756Y (en) | 2007-05-16 | 2007-05-16 | Marine high power diesel engine fuel oil injector assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201092947U CN201031756Y (en) | 2007-05-16 | 2007-05-16 | Marine high power diesel engine fuel oil injector assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201031756Y true CN201031756Y (en) | 2008-03-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201092947U Expired - Fee Related CN201031756Y (en) | 2007-05-16 | 2007-05-16 | Marine high power diesel engine fuel oil injector assembly |
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| CN (1) | CN201031756Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101694199B (en) * | 2009-08-20 | 2011-05-11 | 余姚市舒春机械有限公司 | Nozzle of low-speed diesel engine |
| CN102374084A (en) * | 2011-09-20 | 2012-03-14 | 福建省莆田市中涵机动力有限公司 | Static non-leakage high pressure common-rail injector |
| CN102748177A (en) * | 2012-07-26 | 2012-10-24 | 余姚市舒春机械有限公司 | Oil sprayer assembly of long-needle marine diesel engine |
| CN102748178A (en) * | 2012-07-26 | 2012-10-24 | 余姚市舒春机械有限公司 | Marine diesel injector assembly |
| 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 |
| CN109909090A (en) * | 2019-04-02 | 2019-06-21 | 北京理工大学 | A kind of hyperbaric environment list drop generating device |
-
2007
- 2007-05-16 CN CNU2007201092947U patent/CN201031756Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101694199B (en) * | 2009-08-20 | 2011-05-11 | 余姚市舒春机械有限公司 | Nozzle of low-speed diesel engine |
| CN102374084A (en) * | 2011-09-20 | 2012-03-14 | 福建省莆田市中涵机动力有限公司 | Static non-leakage high pressure common-rail injector |
| CN102374084B (en) * | 2011-09-20 | 2012-12-05 | 福建省莆田市中涵机动力有限公司 | Static non-leakage high pressure common-rail injector |
| CN102748177A (en) * | 2012-07-26 | 2012-10-24 | 余姚市舒春机械有限公司 | Oil sprayer assembly of long-needle marine diesel engine |
| 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 |
| 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 |
| CN109909090A (en) * | 2019-04-02 | 2019-06-21 | 北京理工大学 | A kind of hyperbaric environment list drop generating device |
| CN109909090B (en) * | 2019-04-02 | 2021-02-09 | 北京理工大学 | High-pressure environment single-droplet generating device |
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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: 20080305 Termination date: 20150516 |
|
| EXPY | Termination of patent right or utility model |