CN201884176U - Fuel-injection nozzle matching part - Google Patents
Fuel-injection nozzle matching part Download PDFInfo
- Publication number
- CN201884176U CN201884176U CN2010206641887U CN201020664188U CN201884176U CN 201884176 U CN201884176 U CN 201884176U CN 2010206641887 U CN2010206641887 U CN 2010206641887U CN 201020664188 U CN201020664188 U CN 201020664188U CN 201884176 U CN201884176 U CN 201884176U
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- conical surface
- oil
- needle
- valve body
- spray
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Abstract
The utility model relates to a fuel-injection nozzle matching part which comprises a needle valve body and a needle valve, wherein a sealing end surface is arranged at the upper end of the needle valve body and is clung to a fuel-injection machine assembly; a spray orifice is arranged at the lower end of the needle valve body; the needle valve body is internally provided with a guide middle hole that can contain the needle valve; a spherical fuel containing tank is formed in the middle of the guide middle hole; a low-pressure chamber is arranged at the lower part of the fuel containing tank and is communicated with the guide middle hole; a sealing conical surface of the needle valve body is formed at the lower end of the low-pressure chamber; the needle valve comprises a guide external round at the upper part and a small external round at the lower part; and a pressure ejector rod is arranged above the guide external round. The fuel-injection nozzle matching part is characterized in that a first conical surface, a second conical surface, a spraying rod transition cylinder and a spraying rod are sequentially arranged below the small external round; the cone angle of the first conical surface is smaller than that of the second conical surface; and the cone angle of the first conical surface is 45 degrees, while the cone angle of the second conical surface is 60 degrees. By adopting the fuel-injection nozzle matching part, the percent of pass of products is improved, the spraying quality is improved, and the combustion is more sufficient, so that the energy-saving and emission-reducing requirements of the product can be met better.
Description
Technical field
The utility model relates to a kind of Oil-Spray Match Parts, especially a kind of Oil-Spray Match Parts of diesel fuel injection system.
Background technique
Along with rapid economic development, the modern more pays close attention to energy-conservation, reduction of discharging, and the diesel emission standard is also improving.How reaching further energy-conservation when not reducing diesel engine power, reduce discharging has been extremely urgent thing.Because the age relation, what product specification was originally paid attention to is the watt level problem of diesel engine, and diesel emission and energy loss are not done very more concern.
Oil injecting nozzle is by connecting injector assembly by chance, connect mutually with oil pump by injector assembly, when oil pump feed by the spring force in the injector assembly with successively chew diesel oil that the high pressure inflow pipeline enters generation oil pressure at seal face from oil, then by the injection of the jet orifice of needle valve motivation firing chamber of setting out.Because existing needle-valve seat surface is too small, too small at the cross section at seal face place, oil pressure is easy to generate at the seal face place can not seal up oil fully, thereby has reduced oil pressure, has influenced atomization quality, makes burning insufficient, has reduced engine power.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of Oil-Spray Match Parts is provided, and has improved product percent of pass and atomization quality.
According to the technological scheme that the utility model provides, described injector nozzle matching parts comprises needle-valve body and needle-valve, and the upper end of described needle-valve body is the seal face that can fit with injector assembly, and the lower end of needle-valve body is provided with spray orifice; Be provided with the guiding mesopore that can place needle-valve in the inside of described needle-valve body, form spherical oil holding slot at the middle part of guiding mesopore, in the bottom of oil holding slot be and the low-pressure cavity of guiding mesopore UNICOM, the lower end of low-pressure cavity forms the needle-valve body sealing cone; Described needle-valve comprises the guiding cylindrical on top and the little cylindrical of bottom, above the guiding cylindrical, be provided with pressure mandril, feature: set gradually first conical surface, second conical surface, spray boom transition cylinder and spray boom below little cylindrical, the cone angle of described first conical surface is less than the cone angle of second conical surface.
The cone angle of described first conical surface is 45 °, and the cone angle of second conical surface is 60 °.
Between described pressure mandril and guiding cylindrical, form the omoplate face.
The guiding cylindrical of described needle-valve and the guiding mesopore of needle-valve body closely cooperate.
On described seal face, be provided with high pressure oil inlet hole with oil holding slot UNICOM.Described seal face is provided with positioning hole.
Described sealing cone and spray orifice UNICOM.
The utility model improves product percent of pass, has improved atomization quality by product restructuring, and it is more abundant to burn, and further improves the demand that product is energy-conservation, reduce discharging.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the structural representation of needle-valve body of the present utility model.
Fig. 3 is the structural representation of needle-valve of the present utility model.
Fig. 4 is the I enlarged view of Fig. 3.
Embodiment
The utility model is described in further detail below in conjunction with concrete accompanying drawing.
As Fig. 1 ~ shown in Figure 4: Oil-Spray Match Parts comprises positioning hole 1, guiding mesopore 2, oil holding slot 3, seal face 4, high pressure oil inlet hole 5, low-pressure cavity 6, needle-valve body sealing cone 7, spray orifice 8, pressure mandril 9, omoplate face 10, guiding cylindrical 11, little cylindrical 12, first conical surface 13, second conical surface 14, spray boom transition cylinder 15, spray boom 16, needle-valve body 17, needle-valve 18 etc.
The utility model comprises needle-valve body 17 and needle-valve 18, and the upper end of described needle-valve body 17 is the seal face 4 that can fit with injector assembly, and the lower end of needle-valve body 17 is provided with spray orifice 8; Be provided with the guiding mesopore 5 that to place needle-valve 18 in the inside of described needle-valve body 17, middle part at guiding mesopore 5 forms spherical oil holding slot 3, it in the bottom of oil holding slot 3 low-pressure cavity 6 with guiding mesopore 5 UNICOMs, the lower end of low-pressure cavity 6 forms needle-valve body sealing cone 7, described sealing cone 7 and spray orifice 8 UNICOMs;
Described needle-valve 18 comprises the guiding cylindrical 11 on top and the little cylindrical 12 of bottom, is provided with pressure mandril 9 above guiding cylindrical 11, sets gradually first conical surface 13, second conical surface 14, spray boom transition cylinder 15 and spray boom 16 below little cylindrical 12;
The cone angle of first conical surface 13 is 45 °, and the cone angle of second conical surface 14 is 60 °;
Between pressure mandril 9 and guiding cylindrical 11, form omoplate face 10;
The guiding cylindrical 11 of described needle-valve 18 closely cooperates with the guiding mesopore 2 of needle-valve body 17;
On described seal face 4, be provided with high pressure oil inlet hole 5 with oil holding slot 3 UNICOMs;
Described seal face 4 is provided with positioning hole 1.
Working principle of the present utility model: the structure of Oil-Spray Match Parts described in the utility model is by changing first conical surface 13, thereby needle-valve body sealing cone 7 and first conical surface 13 of needle-valve and the contact stress of second conical surface 14 have been reduced, thereby improved the sealing life-span of Oil-Spray Match Parts, increased the friendship circular diameter of needle-valve first conical surface 13 and second conical surface, 14 sealing cones, make atomizing particle thinner, it is more suitable abundant that Oil-Spray Match Parts is burnt in engine chamber, improved product performance.
By the working position of positioning hole 1 locking pin valve body 17, seal face 4 is fitted with the injector assembly dividing plate, and guiding mesopore 2 and guiding cylindrical 11 are sealed and matched; Diesel oil enters oil holding slot 3 and low-pressure cavity 6 from high pressure oil inlet hole 5, because constantly entering of diesel oil from high pressure oil inlet hole 5, the upwards active force that forms in oil holding slot 3 and guiding mesopore 2 bottoms is greater than the downward active force of the spring of injector assembly, second conical surface 14 is upwards lifted, thereby diesel oil pass through from the gap location of the needle-valve body sealing cone 7 and second conical surface 14; Because at this moment oil pressure pressure is very high, the jet velocity of diesel oil is very fast, after the diesel oil in the time of by spray orifice 8 becomes vaporific particle, ejects the mist of oil that has several angle along the angle of spray boom 16.When the fuel feeding that connects oil injector body drives fuel cut-off, after the oil pressure of low-pressure cavity 6 drops to certain condition, by the spring downward active force of oil injector body assembly when medi-spring, make the sealing of fitting again of the needle-valve body sealing cone 7 and second conical surface 14, a to-and-fro motion that goes round and begins again of lifting second conical surface 14 when the oil pressure of fuel feeding low-pressure cavity 6 reaches certain pressure again when the fuel feeding drive system.The utility model has increased the oily annulus area of chewing needle-valve sealing cone 7, makes oil chew needle-valve 18 and has formed the narrowest cross section in the sealed seat surface zone of needle-valve body 17.Pen Chu diesel oil atomization is better like this, and it is more abundant to burn.
Claims (7)
1. an Oil-Spray Match Parts comprises needle-valve body (17) and needle-valve (18), and the upper end of described needle-valve body (17) is the seal face (4) that can fit with the oil-injection machine assembly, and the lower end of needle-valve body (17) is provided with spray orifice (8); Be provided with the guiding mesopore (5) that to place needle-valve (18) in the inside of described needle-valve body (17), form spherical oil holding slot (3) at the middle part of guiding mesopore (5), in the bottom of oil holding slot (3) be and the low-pressure cavity (6) of guiding mesopore (5) UNICOM, the lower end of low-pressure cavity (6) forms needle-valve body sealing cone (7); Described needle-valve (18) comprises the guiding cylindrical (11) on top and the little cylindrical (12) of bottom, top at guiding cylindrical (11) is provided with pressure mandril (9), it is characterized in that: set gradually first conical surface (13), second conical surface (14), spray boom transition cylinder (15) and spray boom (16) in the below of little cylindrical (12), the cone angle of described first conical surface (13) is less than the cone angle of second conical surface (14).
2. Oil-Spray Match Parts as claimed in claim 1 is characterized in that: the cone angle of described first conical surface (13) is 45 °, and the cone angle of second conical surface (14) is 60 °.
3. Oil-Spray Match Parts as claimed in claim 1 is characterized in that: form omoplate face (10) between described pressure mandril (9) and guiding cylindrical (11).
4. Oil-Spray Match Parts as claimed in claim 1 is characterized in that: the guiding cylindrical (11) of described needle-valve (18) closely cooperates with the guiding mesopore (2) of needle-valve body (17).
5. Oil-Spray Match Parts as claimed in claim 1 is characterized in that: be provided with the high pressure oil inlet hole (5) with oil holding slot (3) UNICOM on described seal face (4).
6. Oil-Spray Match Parts as claimed in claim 1 is characterized in that: described seal face (4) is provided with positioning hole (1).
7. Oil-Spray Match Parts as claimed in claim 1 is characterized in that: described sealing cone (7) and spray orifice (8) UNICOM.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206641887U CN201884176U (en) | 2010-12-17 | 2010-12-17 | Fuel-injection nozzle matching part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206641887U CN201884176U (en) | 2010-12-17 | 2010-12-17 | Fuel-injection nozzle matching part |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201884176U true CN201884176U (en) | 2011-06-29 |
Family
ID=44181715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206641887U Expired - Fee Related CN201884176U (en) | 2010-12-17 | 2010-12-17 | Fuel-injection nozzle matching part |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201884176U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102003320A (en) * | 2010-12-17 | 2011-04-06 | 无锡威孚长安有限责任公司 | Oil nozzle coupling part |
-
2010
- 2010-12-17 CN CN2010206641887U patent/CN201884176U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102003320A (en) * | 2010-12-17 | 2011-04-06 | 无锡威孚长安有限责任公司 | Oil nozzle coupling part |
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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: 20110629 Termination date: 20151217 |
|
| EXPY | Termination of patent right or utility model |