CN106826578A - A kind of grinding guiding device and Ginding process suitable for the grinding of high injection pressure nozzle needle valve body - Google Patents
A kind of grinding guiding device and Ginding process suitable for the grinding of high injection pressure nozzle needle valve body Download PDFInfo
- Publication number
- CN106826578A CN106826578A CN201710009134.3A CN201710009134A CN106826578A CN 106826578 A CN106826578 A CN 106826578A CN 201710009134 A CN201710009134 A CN 201710009134A CN 106826578 A CN106826578 A CN 106826578A
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- China
- Prior art keywords
- grinding
- valve body
- needle valve
- nozzle needle
- spray orifice
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- 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.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C7/00—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fuel-Injection Apparatus (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
- Nozzles (AREA)
Abstract
The invention discloses a kind of grinding guiding device suitable for the grinding of high injection pressure nozzle needle valve body, including alignment pin and the diversion rod with positioning pin connection；Alignment pin is arranged on limitation diversion rod movement in nozzle needle valve body cavity, and water conservancy diversion club head is located at nozzle needle valve body spray orifice porch, shelters from spray orifice entrance the latter half fillet.A kind of Ginding process, including once conventional grinding, reinstall the grinding secondary grinding of guiding device, and grinding guiding device grinds again after removing.The nozzle needle valve body of present invention grinding is in atomizer performance, further reduce atomizer internal flow loss, discharge coefficient is significantly improved, the probability that spray orifice produces cavitation pitting under high injection pressure, service life of the extension atomizer under high injection pressure is reduced.In technique, extend needle-valve body can milling time, it is to avoid conventional grinding methods increase with milling time, and jet orifice of needle valve porch integral grinding degree increases, and produces interference between spray orifice too early.
Description
Technical field
It is more particularly to a kind of to be applied to high injection pressure injector valve the invention belongs to fuel injector processing technique field
The grinding guiding device of body grinding.
Background technology
At present, common needle-valve body liquid extrusion and abrasion technique process principle is as shown in Figure 6.Needle-valve body is clamped by clamping cylinder,
High pressure abrasive agent enters processed atomizer mesopore by fixture, and Material collecting box for harvesting is returned through balancing gate pit, spray orifice.Grinding agent is acted in high pressure
Under, certain pressure and cutting and grinding agent stream is produced to injection hole on injection nozzle, balancing gate pit, so as to balancing gate pit, spray orifice to needle-valve body
Corner burr and surface carry out micro cutting.By grinding, a certain size circle is formd in spray orifice and balancing gate pit's transitional region
Angle.
Japanese ZEXEL company introductions, nozzle discharge coefficient and spray orifice entrance circular angle（Transition between spray orifice and balancing gate pit）
Size it is relevant, the discharge coefficient of sharp-cornered entrance spray orifice is 0.65 or so, is increased with fillet, and discharge coefficient will gradually increase, from
0.65 can increase to 0.91 or so.
The probability of spray orifice inside generation cavitation also has relation with spray orifice entrance circular angle.Entrance circular angle is bigger, produces cavitation
Probability is smaller.It should be noted that with the increase of atomizer design pressure, the cavitation pitting effect caused by cavitation is also stronger, influence
The atomization and service life of atomizer.
Spray orifice porch fillet is increased, it is necessary to increase amount of grinding.The known main method for increasing amount of grinding includes increasing
Tonnage, extension process time, and conventional crush and grind processing is used, limited by domestic process equipment and level, process
Hypertonia or overlong time, are easily caused spray orifice crimp, and discharge coefficient only up to reach 0.8 or so.The opposing party
Face, whether main at present to judge crush and grind by detecting needle-valve body discharge coefficient qualified, is squeezed for spray orifice entrance circular angle
The shape of pressure is uncontrollable.
For design injection pressure atomizer higher, either consider from raising discharge coefficient or reduction cavitation pitting,
It is required to increase the amount of grinding of spray orifice entrance circular angle.CFD result of calculations show that spray orifice entrance circular angle has influenceed master on flow behavior
Lead effect is spray orifice entrance circular angle top half (away from needle-valve body head).And conventional grinding methods are used, the spray being ground
Circumferentially upper and lower radius of corner is more or less the same hole porch fillet, as shown in Figure 1.Common atomizer pressure chamber shape is determined
Many small compared to spray orifice top in ground space below spray orifice porch are determined.Using conventional grinding, by spray orifice entrance circular angle
Top half grinding it is sufficiently large when, spray orifice entrance the latter half fillet overgrinding can be made, cause to produce between spray orifice entrance
Interference, improves the randomness of structure.Need to be improved Ginding process, laid particular stress in process of lapping to spray orifice entrance upper half
The grinding of part fillet, while controlling the amount of grinding of spray orifice entrance the latter half fillet (near needle-valve body head) in certain model
Enclose.Both atomizer flow behavior had been improved, the interference between spray orifice had been it also avoid, extending can milling time.
The content of the invention
There is provided one kind present invention aim at the defect for existing atomizer grinding technique can effectively reduce atomizer
The grinding guiding device suitable for the grinding of high injection pressure nozzle needle valve body of cavitation pitting.
The present invention to achieve the above object, is adopted the following technical scheme that：
A kind of grinding guiding device suitable for the grinding of high injection pressure nozzle needle valve body, it is characterised in that：Including alignment pin
And the diversion rod with positioning pin connection；The alignment pin is arranged on limitation diversion rod movement in nozzle needle valve body cavity, described
Water conservancy diversion club head is located at nozzle needle valve body spray orifice porch, shelters from spray orifice entrance the latter half fillet.
Further it is characterized in that：The water conservancy diversion club head is plane, is adapted with nozzle needle valve body head sizes.
Preferably：The diversion rod is stepped, and head diameter is less than tail diameter.
The alignment pin is trifid structure, and its diameter is adapted with nozzle needle valve body afterbody cavity diameter.
A kind of Ginding process using the above-mentioned grinding guiding device suitable for the grinding of high injection pressure nozzle needle valve body,
It is characterized in that comprising the steps：
（1）Once grind：The conventional grinding that once grinding is taken, nozzle needle valve body is fit directly on grinding clamp, high
Pressure grinding agent enters processed nozzle needle valve body mesopore by grinding clamp, and spray orifice is ground through balancing gate pit, spray orifice；Grinding
Pressure 3-4MPa, grinds 3-6S；
（2）Secondary grinding：Grinding guiding device is inserted in nozzle needle valve body cavity, grinding guiding device head shelters from spray
Hole entrance the latter half fillet；Again by nozzle needle valve body assembling on grinding clamp, high pressure abrasive agent is again by grinding clamp
Into processed nozzle needle valve body mesopore, spray orifice entrance top half fillet is ground through balancing gate pit, spray orifice；Grinding pressure
Power 4.5MPa, milling time 35S ~ 45S；
（3）Three grindings：Grinding guiding device is removed, then by nozzle needle valve body assembling on grinding clamp, using high pressure
Grinding agent is ground to nozzle needle valve body spray orifice, grinding pressure 2MPa, grinds 5 ~ 10S.
Using the present invention grinding guiding device and Ginding process, compared to conventional grinding methods, improve atomizer performance and
Processing technology aspect has positive role.In atomizer performance, atomizer internal flow loss is on the one hand further reduced,
Discharge coefficient is significantly improved, on the other hand, spray orifice entrance circular angle is reduced and is in the cavitation pitting easily produced under high injection pressure,
Service life of the extension atomizer under high injection pressure.In atomizer processing technology, the ground when of needle-valve body is extended
Between, it is to avoid conventional grinding methods increase with milling time, and jet orifice of needle valve porch integral grinding degree increases, between spray orifice
Interference is produced too early.
Brief description of the drawings
Fig. 1 is the injection hole on injection nozzle entrance shape schematic diagram of conventional grinding.
Fig. 2 is the injection hole on injection nozzle entrance shape schematic diagram using present invention grinding.
Fig. 3 is intended to for assembled of the present invention.
Fig. 4 is head enlarged diagram of the present invention.
Fig. 5 is the process chart using present invention grinding.
Fig. 6 is the process chart of existing needle-valve body liquid extrusion and abrasion technique.
Specific embodiment
A kind of grinding guiding device suitable for the grinding of high injection pressure nozzle needle valve body as shown in Figure 3,4, including it is fixed
Position pin 1 and the diversion rod 2 being connected with alignment pin 1；The alignment pin 1 is arranged on limitation diversion rod 2 in the cavity of nozzle needle valve body 3
Mobile, the head of the diversion rod 2 is located at the spray orifice porch of nozzle needle valve body 3, shelters from spray orifice entrance the latter half fillet.Institute
It is stepped to state diversion rod 2, and head diameter is less than tail diameter.The head of the diversion rod 2 is plane, with nozzle needle valve body 3
Head sizes are adapted.The alignment pin 1 is trifid structure, and its diameter is adapted with the afterbody cavity diameter of nozzle needle valve body 3.
As shown in figure 5, using the technological process of present invention grinding.
Needle-valve body is first carried out into conventional grinding for the first time, the conventional grinding that once grinding is taken is straight by nozzle needle valve body
Tipping is fitted on grinding clamp, and high pressure abrasive agent enters processed nozzle needle valve body mesopore by grinding clamp, through balancing gate pit, spray
Hole is ground to spray orifice；Grinding pressure 3-4MPa, grinds 3-6S.Milling time can not be long, is otherwise easily caused spray orifice and enters
Fillet is excessive under mouthful, produces interference between spray orifice too early.
Increasing grinding pressure carries out second grinding：Grinding guiding device is inserted in nozzle needle valve body cavity, grinding
Guiding device head shelters from spray orifice entrance the latter half fillet；Again by nozzle needle valve body assembling on grinding clamp, high pressure
Grinding agent enters processed nozzle needle valve body mesopore by grinding clamp again, through balancing gate pit, spray orifice to the spray orifice entrance first half
Cyclotomy angle is ground；Grinding pressure 4.5MPa, milling time 35S ~ 45S.
Three grindings：Grinding guiding device is removed, then by nozzle needle valve body assembling on grinding clamp, using high pressure
Grinding agent is ground to nozzle needle valve body spray orifice, grinding pressure 2MPa, 5 ~ 10S is ground, to ensure that fillet is with on spray orifice
Seamlessly transitting between fillet.
The injection hole on injection nozzle entrance shape schematic diagram that Fig. 2 is ground using present invention grinding guiding device.By the technique hand
The implementation of section, compared to conventional grinding methods, has positive role in terms of atomizer performance and processing technology is improved.In atomizer
In performance, atomizer internal flow loss is on the one hand further reduced, significantly improve discharge coefficient, on the other hand, reduced
Spray orifice entrance circular angle is in the cavitation pitting easily produced under high injection pressure, use longevity of the extension atomizer under high injection pressure
Life.In atomizer processing technology, extend needle-valve body can milling time, it is to avoid conventional grinding methods increase with milling time
Plus, jet orifice of needle valve porch integral grinding degree increases, and produces interference between spray orifice too early.
Claims (4)
1. it is a kind of suitable for high injection pressure nozzle needle valve body grinding grinding guiding device, it is characterised in that：Including positioning
Pin and the diversion rod with positioning pin connection；The alignment pin is arranged on the movement of limitation diversion rod, institute in nozzle needle valve body cavity
Water conservancy diversion club head is stated positioned at nozzle needle valve body spray orifice porch, spray orifice entrance the latter half fillet is sheltered from.
2. the grinding guiding device suitable for the grinding of high injection pressure nozzle needle valve body according to claim 1, it is special
Levy and be：The diversion rod is stepped, and head diameter is less than tail diameter.
3. it is according to claim 1 and 2 suitable for high injection pressure nozzle needle valve body grinding grinding guiding device, its
It is characterised by：The alignment pin is trifid structure, and its diameter is adapted with nozzle needle valve body afterbody cavity diameter.
4. a kind of any one of use claim 1-3 is applied to the grinding guiding device of high injection pressure nozzle needle valve body grinding
Ginding process, it is characterised in that comprise the steps：
（1）Once grind：The conventional grinding that once grinding is taken, nozzle needle valve body is fit directly on grinding clamp, high
Pressure grinding agent enters processed nozzle needle valve body mesopore by grinding clamp, and spray orifice is ground through balancing gate pit, spray orifice；Grinding
Pressure 3-4MPa, grinds 3-6S；
（2）Secondary grinding：Grinding guiding device is inserted in nozzle needle valve body cavity, grinding guiding device head shelters from spray
Hole entrance the latter half fillet；Again by nozzle needle valve body assembling on grinding clamp, high pressure abrasive agent is again by grinding clamp
Into processed nozzle needle valve body mesopore, spray orifice entrance top half fillet is ground through balancing gate pit, spray orifice；Grinding pressure
Power 4.5MPa, milling time 35S ~ 45S；
（3）Three grindings：Grinding guiding device is removed, then by nozzle needle valve body assembling on grinding clamp, using high pressure
Grinding agent is ground to nozzle needle valve body spray orifice, grinding pressure 2MPa, grinds 5 ~ 10S.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710009134.3A CN106826578B (en) | 2017-01-06 | 2017-01-06 | Grinding and flow guiding device and grinding method suitable for grinding needle valve body of high-injection-pressure oil nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710009134.3A CN106826578B (en) | 2017-01-06 | 2017-01-06 | Grinding and flow guiding device and grinding method suitable for grinding needle valve body of high-injection-pressure oil nozzle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106826578A true CN106826578A (en) | 2017-06-13 |
| CN106826578B CN106826578B (en) | 2020-06-16 |
Family
ID=59117114
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710009134.3A Active CN106826578B (en) | 2017-01-06 | 2017-01-06 | Grinding and flow guiding device and grinding method suitable for grinding needle valve body of high-injection-pressure oil nozzle |
Country Status (1)
| Country | Link |
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| CN (1) | CN106826578B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115324715A (en) * | 2022-10-13 | 2022-11-11 | 潍柴动力股份有限公司 | Precombustion chamber and processing method |
Citations (7)
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|---|---|---|---|---|
| WO2000060234A1 (en) * | 1999-03-31 | 2000-10-12 | Siemens Aktiengesellschaft | Method and device for hydro-erosively smoothing the bore edges in a nozzle body, and nozzle body |
| WO2005049273A1 (en) * | 2003-11-14 | 2005-06-02 | Robert Bosch Gmbh | Method and device for the hydro-erosive rounding of bore passages |
| CN102400825A (en) * | 2011-12-20 | 2012-04-04 | 余姚市舒春机械有限公司 | Cooling needle valve matching part for marine diesel engine |
| CN103072070A (en) * | 2012-12-31 | 2013-05-01 | 苏州维赛克阀门检测技术有限公司 | Mechanical nozzle grinding device |
| US20140165807A1 (en) * | 2011-08-11 | 2014-06-19 | Durr Ecoclean Gmbh | Apparatus for generating a pulsating pressurized fluid jet |
| CN104490963A (en) * | 2013-07-25 | 2015-04-08 | 文山苗乡三七科技有限公司 | Grinding method for panax notoginseng |
| CN106216785A (en) * | 2016-07-28 | 2016-12-14 | 北海明杰科技有限公司 | A kind of fuel injection equipment injection hole on injection nozzle processing technique |
-
2017
- 2017-01-06 CN CN201710009134.3A patent/CN106826578B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000060234A1 (en) * | 1999-03-31 | 2000-10-12 | Siemens Aktiengesellschaft | Method and device for hydro-erosively smoothing the bore edges in a nozzle body, and nozzle body |
| WO2005049273A1 (en) * | 2003-11-14 | 2005-06-02 | Robert Bosch Gmbh | Method and device for the hydro-erosive rounding of bore passages |
| US20140165807A1 (en) * | 2011-08-11 | 2014-06-19 | Durr Ecoclean Gmbh | Apparatus for generating a pulsating pressurized fluid jet |
| CN102400825A (en) * | 2011-12-20 | 2012-04-04 | 余姚市舒春机械有限公司 | Cooling needle valve matching part for marine diesel engine |
| CN103072070A (en) * | 2012-12-31 | 2013-05-01 | 苏州维赛克阀门检测技术有限公司 | Mechanical nozzle grinding device |
| CN104490963A (en) * | 2013-07-25 | 2015-04-08 | 文山苗乡三七科技有限公司 | Grinding method for panax notoginseng |
| CN106216785A (en) * | 2016-07-28 | 2016-12-14 | 北海明杰科技有限公司 | A kind of fuel injection equipment injection hole on injection nozzle processing technique |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115324715A (en) * | 2022-10-13 | 2022-11-11 | 潍柴动力股份有限公司 | Precombustion chamber and processing method |
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| CN106826578B (en) | 2020-06-16 |
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