CN207761860U - A kind of anti-leak formula fuel injector internal structure easy to install - Google Patents
A kind of anti-leak formula fuel injector internal structure easy to install Download PDFInfo
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- CN207761860U CN207761860U CN201721711129.9U CN201721711129U CN207761860U CN 207761860 U CN207761860 U CN 207761860U CN 201721711129 U CN201721711129 U CN 201721711129U CN 207761860 U CN207761860 U CN 207761860U
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- needle
- valve
- oil
- fuel injector
- internal structure
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Abstract
A kind of anti-leak formula fuel injector internal structure easy to install, belong to diesel-engine equipment technical field, including oil injector body, needle-valve body and swivel nut, oil injector body bottom surface is equipped with bottom protrusion, the top surface of needle-valve body is equipped with top depression, bottom protrusion forms male-female engagement with top depression and connect, needle-valve body is internally provided with the valve core of needle valve with conehead, the top of valve core of needle valve is equipped with connecting rod, connecting rod, which is screwed on mandril by screw thread, to be connected, sealing ring is arranged on connecting rod, the rear surface of valve core of needle valve is equipped with several oil grooves, and oil groove is arranged between conehead and balancing gate pit.The utility model structure novel, compared with traditional fuel injector internal structure, it can be omitted the structure design of alignment pin, upper oil duct can form slitless connection with lower oil duct, reduce difficulty of processing and installation difficulty, the efficiency for promoting assembling parts in fuel injector, due to fluid guiding role, improving the quality of oil atomization.
Description
Technical field
The utility model belongs to diesel-engine equipment technical field, is related to a kind of atomizer internal structure, specifically relates to
And a kind of anti-leak formula fuel injector internal structure easy to install.
Background technology
Fuel injector is component more important in diesel engine, its effect is by fuel-oil atmozation into thinner particle, and
By in its reasonable layout to combustion chamber, it is mixed to form combustion mixture with air, the operating condition that fuel injector should meet exactly is sprayed
Oil should have certain injection pressure and range and suitable spray cone angle and spraying quality, be answered in defined stopping oil injection time
Fuel delivery can be cut off rapidly, and weeping does not occur in end of injection.Fuel injector is divided into open type oil spout according to closing structure
Device and close fuel injector can be divided into hole nozzle and axial needle type injector, in diesel engine again according to different types of combustion chamber
Extensively using close fuel injector, a pair of of precision pair that the atomizer of close fuel injector is made of needle-valve and needle-valve body is matched
It is only 0.002mm~0.004mm to close gap, therefore after finishing, and pairing is also needed to grind, therefore cannot be exchanged in use,
General needle-valve then uses impact-resistant high duty alloy steel making using the good high speed steel making of thermal stability, needle-valve body.With cellular type
For fuel injector, which is usually used on direct injection combustion chamber diesel engine, and head is machined with spray orifice, and the number of spray orifice is 1-
7, a diameter of 0.2-0.5mm of spray orifice.However, be hole nozzle or axial needle type injector, operation principle be from
The high-pressure diesel of injection pump output enters the high-voltage oil cavity in the middle part of needle-valve by inlet connector, when oil pressure counter pressure spring pre-tightens
When frictional force between power and pintle nozzle match-ing parts, needle-valve rises, and high-pressure diesel is ejected by spray orifice, when injection pump fuel cut-off,
Spray orifice closing drops in needle-valve under the action of pressure spring.
In existing hole nozzle, oil injector body is tightened by swivel nut again after being combined with needle-valve body end face, in order to prevent
Upper oil duct in oil injector body is formed with the lower oil duct in needle-valve body to misplace, and needs the positioning that limit is arranged between two end faces
It the positioning accuracy of axis pin, this positioning accuracy that upper and lower oil duct is processed and alignment pin processing while proposing positional precision and wants
It asks, on the one hand increases the difficulty of processing, on the other hand increase the installation difficulty of oil injector body and needle-valve body；In addition, traditional
Fuel injector internal structure do not have fluid guiding role, oil atomization effect needs to be further improved.
Utility model content
The purpose of this utility model is oiled after being combined with needle-valve body end face for oil injector body in current hole nozzle
Road is easy to form dislocation with lower oil duct, and position accuracy demand is high, and difficulty of processing is big, inside the big and traditional fuel injector of installation difficulty
Structure does not have a fluid guiding role, the deficiencies of oil atomization effect is poor, proposes inside a kind of anti-leak formula fuel injector easy to install
Structure, the oil liquid leakage that machining accuracy deficiency can be effectively prevent to bring can reduce difficulty of processing, can promote part group in fuel injector
The efficiency of dress improves oil atomization quality.
The technical solution of the utility model is：A kind of anti-leak formula fuel injector internal structure easy to install, including oil injector body,
Needle-valve body and swivel nut, the oil injector body is interior to be equipped with mandril mounting hole and upper oil duct, and spool mounting hole is equipped in the needle-valve body
With lower oil duct, the spool mounting hole is interior to be equipped with the balancing gate pit communicated with lower oil duct；It is characterized in that：The oil injector body bottom surface
It is equipped with bottom protrusion, the upper oil duct is connected to setting with the bottom protrusion, and mandril is equipped in the mandril mounting hole, described
The top surface of needle-valve body is equipped with top depression, and the lower oil duct is connected to setting, the bottom protrusion and top with the top depression
Portion is recessed to form male-female engagement connection, and the needle-valve body is internally provided with the valve core of needle valve with conehead, the top of the valve core of needle valve
Equipped with connecting rod, the connecting rod, which is screwed on mandril by screw thread, to be connected, and sealing ring is arranged on the connecting rod, the valve core of needle valve
Rear surface is equipped with several oil grooves, and the oil groove is arranged between the conehead and balancing gate pit.
The bottom protrusion and top depression are circular cone shape structure, and the overall size of top depression is convex slightly larger than bottom
The size risen.
The oil groove is arranged on the outer surface of valve core of needle valve, and oil groove is rectangle flat-bottom slot, and the depth of oil groove is 0.3~
0.8mm。
The sealing ring is internally provided with internal thread, and sealing ring is connected and fixed with connecting rod, sealing ring setting valve core of needle valve with
Seam crossing between oil injector body.
Height of the oil groove under valve core of needle valve and needle-valve body closed state is less than the bottom surface of balancing gate pit.
The beneficial effects of the utility model are：A kind of anti-leak formula fuel injector internal junction easy to install provided by the utility model
Structure, structure novel, operation principle is clear, is made of oil injector body, swivel nut, needle-valve body and valve core of needle valve in structure, oil injector body
Bottom end is equipped with protrusion, and needle-valve body top is equipped with recess, and oil injector body is mutually located cooperation peace with needle-valve body by protrusion and recess
It fills, valve core of needle valve is equipped with oil groove in addition, is conducive to the guiding of fluid, and valve core of needle valve top is arranged sealing ring, can both be formed
Internal sealing, and the leakage of fluid can be prevented, compared with traditional fuel injector internal structure, it is convenient to omit the knot of alignment pin
Structure designs, and upper oil duct can form slitless connection with lower oil duct, reduces difficulty of processing and installation difficulty, is promoted zero in fuel injector
The efficiency of part assembling, due to fluid guiding role, improving the quality of oil atomization.
Description of the drawings
Fig. 1 is the utility model entirety complete section structural schematic diagram.
Fig. 2 is the partial enlargement structural representation at A in Fig. 1.
Fig. 3 is the section structure diagram in the directions B-B in Fig. 1.
In figure：Oil injector body 1, bottom protrusion 1-1, mandril 2, upper oil duct 3, connecting rod 4, sealing ring 5, lower oil duct 6, needle-valve valve
Core 7, swivel nut 8, needle-valve body 9, top depression 9-1, balancing gate pit 10, oil groove 11, conehead 12, spray orifice 13.
Specific implementation mode
The utility model is described in further detail below in conjunction with the accompanying drawings：
As shown in Figs. 1-3, a kind of anti-leak formula fuel injector internal structure easy to install, including oil injector body 1,9 and of needle-valve body
Swivel nut 8, oil injector body 1 is interior to be equipped with mandril mounting hole and upper oil duct 3, and spool mounting hole and lower oil duct 6, valve are equipped in needle-valve body 9
The balancing gate pit 10 communicated with lower oil duct 6 is equipped in core mounting hole；1 bottom surface of oil injector body is equipped with bottom protrusion 1-1, upper oil duct 3
It is connected to setting with bottom protrusion 1-1, mandril 2 is equipped in mandril mounting hole, the top surface of needle-valve body 9 is equipped with top depression 9-1, under
Oil duct 6 is connected to setting with top depression 9-1, and bottom protrusion 1-1 forms male-female engagement with top depression 9-1 and connect, in needle-valve body 9
Portion is equipped with the valve core of needle valve 7 with conehead 12, and the top of valve core of needle valve 7 is equipped with connecting rod 4, and connecting rod 4 and mandril 2 are screwed on phase by screw thread
Even, sealing ring 5 is arranged on connecting rod 4, the rear surface of valve core of needle valve 7 is equipped with several oil grooves 11, and oil groove 11 is arranged described
Between conehead 12 and balancing gate pit 10.
As shown in Figs. 1-3, a kind of anti-leak formula fuel injector internal structure easy to install, bottom protrusion 1-1 and top depression 9-1
It is circular cone shape structure, the overall size of top depression 9-1 is slightly larger than the size of bottom protrusion 1-1；Oil groove 11 is arranged in needle
On the outer surface of valve core 7, oil groove 11 is rectangle flat-bottom slot, and the depth of oil groove 11 is 0.3~0.8mm；Sealing ring 5 is internally provided with
Internal thread, sealing ring 5 are connected and fixed with connecting rod 4, and the seam crossing between valve core of needle valve 7 and oil injector body 1 is arranged in sealing ring 5；
Height of the oil groove 11 under valve core of needle valve 7 and 9 closed state of needle-valve body is less than the bottom surface of balancing gate pit 10.
The utility model structure novel, oil injector body are mutually located cooperation installation with needle-valve body by protrusion and recess, this
Outer valve core of needle valve is equipped with oil groove, is conducive to the guiding of fluid, and sealing ring is arranged in valve core of needle valve top, can both form inside
Sealing, and the leakage of fluid can be prevented, compared with traditional fuel injector internal structure, it is convenient to omit the structure of alignment pin is set
Meter, upper oil duct can form slitless connection with lower oil duct, reduce difficulty of processing and installation difficulty, promote part group in fuel injector
The efficiency of dress, due to fluid guiding role, improving the quality of oil atomization.
Claims (5)
1. a kind of anti-leak formula fuel injector internal structure easy to install, including oil injector body (1), needle-valve body (9) and swivel nut (8), institute
It states and is equipped with mandril mounting hole and upper oil duct (3) in oil injector body (1), spool mounting hole and lower oil are equipped in the needle-valve body (9)
Road (6), the spool mounting hole is interior to be equipped with the balancing gate pit (10) communicated with lower oil duct (6)；It is characterized in that：The oil injector body
(1) bottom surface is equipped with bottom protrusion (1-1), and the upper oil duct (3) is connected to setting, the mandril with the bottom protrusion (1-1)
Mandril (2) is equipped in mounting hole, the top surface of the needle-valve body (9) is equipped with top depression (9-1), the lower oil duct (6) and institute
Top depression (9-1) connection setting is stated, the bottom protrusion (1-1) forms male-female engagement with top depression (9-1) and connect, described
Needle-valve body (9) is internally provided with the valve core of needle valve (7) with conehead (12), and the top of the valve core of needle valve (7) is equipped with connecting rod (4), institute
It states connecting rod (4) and is screwed on by screw thread with mandril (2) and is connected, sealing ring (5), the valve core of needle valve are arranged on the connecting rod (4)
(7) rear surface is equipped with several oil grooves (11), the oil groove (11) setting the conehead (12) and balancing gate pit (10) it
Between.
2. a kind of anti-leak formula fuel injector internal structure easy to install according to claim 1, it is characterised in that：The bottom
Raised (1-1) and top depression (9-1) are circular cone shape structure, and the overall size of top depression (9-1) is convex slightly larger than bottom
Play the size of (1-1).
3. a kind of anti-leak formula fuel injector internal structure easy to install according to claim 1, it is characterised in that：The oil groove
(11) it is arranged on the outer surface of valve core of needle valve (7), oil groove (11) is rectangle flat-bottom slot, the depth of oil groove (11) is 0.3~
0.8mm。
4. a kind of anti-leak formula fuel injector internal structure easy to install according to claim 1, it is characterised in that：The sealing
Ring (5) is internally provided with internal thread, and sealing ring (5) is connected and fixed with connecting rod (4), and sealing ring (5) setting is in valve core of needle valve (7) and spray
Seam crossing between oily body (1).
5. a kind of anti-leak formula fuel injector internal structure easy to install according to claim 1, it is characterised in that：The oil groove
(11) height under valve core of needle valve (7) and needle-valve body (9) closed state is less than the bottom surface of balancing gate pit (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721711129.9U CN207761860U (en) | 2017-12-11 | 2017-12-11 | A kind of anti-leak formula fuel injector internal structure easy to install |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721711129.9U CN207761860U (en) | 2017-12-11 | 2017-12-11 | A kind of anti-leak formula fuel injector internal structure easy to install |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207761860U true CN207761860U (en) | 2018-08-24 |
Family
ID=63190384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721711129.9U Expired - Fee Related CN207761860U (en) | 2017-12-11 | 2017-12-11 | A kind of anti-leak formula fuel injector internal structure easy to install |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207761860U (en) |
-
2017
- 2017-12-11 CN CN201721711129.9U patent/CN207761860U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180824 Termination date: 20211211 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |