CN208456748U - Natural gas injector - Google Patents
Natural gas injector Download PDFInfo
- Publication number
- CN208456748U CN208456748U CN201821008458.1U CN201821008458U CN208456748U CN 208456748 U CN208456748 U CN 208456748U CN 201821008458 U CN201821008458 U CN 201821008458U CN 208456748 U CN208456748 U CN 208456748U
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- CN
- China
- Prior art keywords
- spool
- natural gas
- metering units
- valve
- gas injector
- Prior art date
- 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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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 88
- 239000003345 natural gas Substances 0.000 title claims abstract description 44
- 239000012530 fluid Substances 0.000 claims abstract description 32
- 239000007789 gas Substances 0.000 claims abstract description 5
- 230000000694 effects Effects 0.000 claims abstract description 3
- 238000007789 sealing Methods 0.000 claims description 25
- 239000000463 material Substances 0.000 claims description 5
- 230000003247 decreasing effect Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 13
- 238000000034 method Methods 0.000 description 4
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000011796 hollow space material Substances 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Abstract
This application involves a kind of natural gas injectors, including valve module, valve module includes: valve body, it is contained in the spool in valve body in axial direction to move between open and closed positions, spool is biased by the spring in closed position and is moved to open position from closed position under external force and the collective effect of gas pressure, and the valve seat with fluid channel, when spool is in the closed position, the end contact valve seat of spool is to close fluid channel, and the end of spool is left from valve seat to open fluid channel when spool is in an open position, wherein the injector further includes metering units, metering units and spool are respectively provided on the two opposite sides of valve seat, metering units are contained in valve body, the port being connected with the fluid channel with valve seat, the fluid flow of natural gas injector is determined by the circulation of port.Using the natural gas injector, the precision of injector is only determined by metering units, manufacturing cost is reduced, improves operability.
Description
Technical field
This application involves a kind of natural gas injector more particularly to a kind of natural gas injections with independent metering units
Device.
Background technique
Currently, more and more vehicles are equipped with natural gas engine, using natural with the enhancing of legislations of environmental protection
For gas blowout emitter to the natural gas of engine spray precise volume, natural gas injector has valve arrangement, described in traditional design
Valve arrangement is performed simultaneously switching and function of measuring during spraying natural gas, and switching and function of measuring are set in other words
In identical position, realizes that injection starts the switching between stopping by the opening and closing of valve, also pass through what valve was opened
Degree adjusts circulation passage area, to realize the adjusting of gas discharge.But such setting can bring some problems,
Such as, on the one hand, switch (opening and closing) is realized by valve arrangement and adjusts two kinds of functions of flow, this behaviour in valve module
Complexity is brought on work, on the other hand, in injector long-term use process, the switching accuracy meeting of sealing element and valve arrangement
It reduces, this can all make the assembling, manufacture and accurate calibration of each component of injector extremely difficult.
Just because of the valve module of natural gas injector in the prior art is without metering units, so that the promotion of valve components
It must be strictly controlled, this leads to manufacture, assembling, calibration and operational difficulty, accordingly, it is desirable to provide a kind of with independent
Metering units natural gas injector.
Utility model content
The application's is designed to provide a kind of natural gas injector, has separately manufactured with the valve module of injector
Individual metering units do not have to consider each portion in valve module so that controlling the flow of natural gas by the metering of metering units
The manufacture of part itself and assembly precision.
For this purpose, the application provides a kind of natural gas injector, including valve module, the valve module includes: valve body, is held
It is contained in the spool in the valve body in axial direction to move between open and closed positions, the spool is inclined by spring
It is placed in the off and is moved to open position from closed position under external force and the collective effect of gas pressure, and have
The valve seat of fluid channel, when spool is in the closed position, the end of spool contacts valve seat to close fluid channel, and in spool
The end of spool is left from valve seat to open fluid channel when in an open position, wherein the injector further includes metering
Unit, the metering units and the spool are respectively provided on the two opposite sides of the valve seat, and the metering units are contained in valve
In vivo, there is the port being connected with the fluid channel of valve seat, the fluid flow of the natural gas injector is by the port
Circulation determines.
Optionally, the circulation area of the port of the metering units is less than or equal to when the spool is in an open position
The maximum flow area of valve module.
Optionally, the port have shrinkage cavity shape, including along natural gas flow direction on cross-sectional area by
Decrescence few truncated cone shape section and the cylindrical section extended from the minor diameter of truncated cone shape section.
Optionally, the metering units are made of the material identical or different with spool.
Optionally, the metering units are positioned to be in contact with the end face of valve seat.
Optionally, the metering units are contained in inside valve seat.
Optionally, the metering units have cylindrical shape or the cylindrical with truncated cone-shaped head.
Optionally, the metering units are fixedly cooperated to valve inner.
Optionally, sealing element is equipped between the metering units and the valve interior wall.
Optionally, the metering units are the plate shape with the port.
Using the natural gas injector of the application, individual metering units are arranged to connect with valve module, so that spool
It is promoted with the accuracy of manufacture of valve seat unlike so important in the prior art, the precision of injector can be by metering units Lai really
It is fixed, manufacturing cost is reduced, operability is improved.
Detailed description of the invention
The various aspects of the application, including its specific features and advantage, all will be easily from features as discussed above
It is understood, in which:
Fig. 1 is the cross-sectional view of natural gas injector in the prior art.
Fig. 2 is the cross-sectional view according to the natural gas injector of the application first embodiment.
Fig. 3 is the cross-sectional view according to the natural gas injector of the application second embodiment.
Fig. 4 is the perspective view of the metering units in natural gas injector shown in Fig. 2.
Fig. 5-7 is the various change example according to metering units in the natural gas injector of the application.
Specific embodiment
The application is more completely described with reference to the accompanying drawings, shown in the drawings of exemplary embodiment.However, the application
It should not be considered as being limited to embodiment listed in this article.As the application those of ordinary skill in the art it is readily comprehensible that
The feature of sample, disclosed exemplary embodiment can combine.Similar reference number refers to similar element in the whole text.For letter
For the sake of bright and clear, well-known function and structure be will not be described in detail.
Fig. 1 is the cross-sectional view of natural gas injector in the prior art.The natural gas injector includes valve module, the valve
Component includes valve body 1', the valve body 1' have columnar upper segment 11', diameter greater than upper segment 11' it is columnar under
The section 12' and conical section 13' between upper segment 11' and lower section 12'.Spool 2' is contained in the valve body 1'
And in axial direction move between open and closed positions, spool 1' be it is hollow, inside be equipped with spring, spool 2'
Lower part have radially obliquely through the channel 21' of setting, spool 2' is located so that channel 21' leads in valve body 1'
The toroidal cavity 25' being formed between spool 2' and conical section 13 and lower section 12.Spool 2' has step in end
22', 22' is provided with the sealing element 3' of annular at step.Cylindrical valve seat is provided in the lower part spool 2' in valve body 1'
There is cylindricality valve seat body 42' and center through hole 43', valve seat 4' to have flange at spool end by 4', the valve seat 4'
When 41', flange 41' and sealing element 3' are contacted, valve module is closed, and fluid flowing disconnects, when flange 41' and sealing element 3' are separated
When, valve module is opened, and fluid flows into cavity 25' from the space inside spool 2' by channel 21' as shown by arrows, and by close
Gap outflow between sealing 3' and flange 41'.
In structure above, the control to the fluid flow that injector is sprayed is realized by two channels, one
It is the degree that the channel 21' in the moving process of spool 2' on spool 2' is covered by the upper segment 11' of valve body 1', second is that sealing
At a distance from part 3' and flange 41' is separated, in the case where spool 2' is constantly moved back and forth, the accuracy of manufacture of spool 2' and installation position
Set and the degree of wear of sealing element 3' there are also mobile adjustings of spool etc. all can cause very big influence to the size of flow,
So that the manufacture, assembling and calibration to valve module propose very high requirement.
To solve the above-mentioned problems, in the application, by the way that an individual metering units are arranged, so that valve module only needs
Play the role of switch, execute simple opening and closing function, the adjusting of flow is executed by individual metering units,
To only with the less accuracy of manufacture and installation accuracy for considering valve module itself.Lower mask body combination Fig. 2-4 come describe according to this
The natural gas injector of application.
Fig. 2 is the cross-sectional view according to the natural gas injector of the application first embodiment.In Fig. 2, natural gas injector
It equally include the valve module similar with shown in Fig. 1, valve module includes columnar valve body 1, the spool 2 being contained in valve body 1, valve
Core 2 can be moved axially between a closed position and a open position, valve body 1 include upper segment 11 and lower section 12 and
The internal diameter of conical section 13 between upper segment 11 and lower section 12, lower section 12 is greater than upper segment 11.
Spool 2 is the hollow cylinder for being built-in with spring, and is biased to the closed position under the action of the spring, spool
There is no seal request between 2 outer wall and the inner wall of valve body 1.The hollow space of spool 2 passes through for fluid such as natural gas, with
Spool 2 direction as shown by the arrows in Figure 2 sprays fluid such as natural gas when in an open position.
There is the groove 23 of annular on the surface of the end 22 of spool 2, accommodate sealing element 24 in groove 23.Spool 2 exists
The channel 21 that close to end there is at least one to radially extend, the shape in the channel 21, which can according to need, to be designed,
As in the embodiment of fig. 2, it is in the embodiment shown in fig. 3 circle that the section in channel 21, which is ellipse,.In addition, as showing
Example shows four in Fig. 2 in 90 degree spaced apart channels 21, but the quantity in channel 21 and distribution angle and specifically arranges
Mode, which can according to need, to be configured, as long as the circulation area in channel 21 meets actual needs.
Spool 2 be arranged so that in valve body 1 spool 2 and conical section 13, upper segment 11 and lower section 12 inner wall it
Between form annular compartment 25, chamber 25 communicates with channel 21.
Being arranged in below spool 2 in valve body 1 is valve seat 3, in sealing contact between valve seat 3 and the lower section 12 of valve body 1,
Valve seat 3 is the cylinder with base recess 32, and roof is equipped with annular through groove 31, and the through slot 31 can be by spool 2
Sealing element 24 is contacted and is sealed up.When spool 2 is in the closed position, spool 2 is with sealing element 24 against the top surface of pedestal 3, envelope
Firmly through slot 31, so that fluid, which cannot flow into pedestal 3 and then reach metering units, passes through arrangement when spool 2 is in an open position
The electromagnetic attraction that electromagnetic coil 6 around valve body generates makes spool 2 overcome spring pressure and fluid together with sealing element 24
Pressure be lifted up, to form gap between sealing element 24 and valve seat 3 so that through slot 31 is communicated with chamber 25, fluid
Enter chamber 25 across spool 2 then to enter in recess 32 by the through slot 31 that the gap flows into valve seat 3, finally be injected into
Engine.Preferably, in sealing contact between valve seat 3 and the inner wall of valve body 1.
In this embodiment, through slot 31, which also can according to need, is alternatively set as several through-holes being circumferentially evenly arranged.
In the application, it is important that the lower section of valve seat 3 is provided with individual metering units 4 inside valve body 1.Metering
Unit 4 is preferably in sealing contact with the inner wall of valve body 1, further preferably contacts with the sealing bottom surface of valve seat 3.Metering units 4 can pass through
Any mode known in the art is assemblied in inside valve body 1, such as press-fit or is welded on 1 inner wall of valve body.
The metering units 4 can have cylindrical outer shape as shown in Figure 3, it is possible to have as shown in Figure 2 has
To the general cylindrical shape on the head of lower process.In Fig. 2 and metering units shown in Fig. 3, inside metering units 4 have be
The port of 41 form of shrinkage cavity, which is divided into two parts along fluid flow direction, i.e., along fluid flow direction in diameter
First hole section 42 of upper tapered truncated cone shape and the second cylindrical hole section 43 extended from the minor diameter of the first hole section 43, though
The maximum inner diameter of first hole section 42 is shown in right Fig. 2 and the internal diameter of the recess 32 of valve seat 3 is substantially the same, but can also root
It is bigger or small than the internal diameter of the recess 32 of valve seat 3 according to needing to be arranged to, for example, metering units 4 shown in Fig. 2 and Fig. 3 can be consolidated
It is scheduled on inside the recess 32 of valve seat 3 in Fig. 2, as long as through slot 31 can be communicated with the first hole section 42.
Fig. 3 is according to the cross-sectional view of the natural gas injector of the application second embodiment, wherein omitting and structure class in Fig. 2
As describe, difference is only described.
The valve body 1 of injector shown in Fig. 3 also includes upper segment 11 and lower section 12, and the internal diameter of lower section 12 is greater than top
Section 11, only, between upper segment 11 and lower section 12 is ladder section 13.
It is directly bonded to sealing element 24 at the end 22 of the spool 2 of injector shown in Fig. 3 and accommodates sealing element without being arranged
24 groove.Sealing element 24 can be connected on the surface of end 22 with various known ways.By cutting for the channel of close end 22 21
Face shape is not ellipse shown in Fig. 2, and instead round, it is of course also possible to be other various shapes, as long as 21 energy of channel
The connection of needs is realized between chamber 25.
In addition, the valve seat 3 in second embodiment is plate shape, and the through slot 31 with the annular similar with shown in Fig. 2,
The closed position of spool 2, through slot 31 is sealed up by sealing element 24, and to prevent fluid from circulating, the shape and size of through slot 31 can root
It is set according to the demand of real fluid circulation.Equally, through slot 31 can also may be alternatively arranged as several circumferentially uniform
The through-hole of distribution.
Metering units 4 in second embodiment are the cylindrical outer shape with shrinkage cavity 41, which flows along fluid
Direction is divided into two parts, i.e., along fluid flow direction in the first hole section 42 of diametrically tapered truncated cone shape and from the first hole section
The the second cylindrical hole section 43 extended at 43 minor diameter, the maximum inner diameter of first hole section 42 are set to larger than through slot
Through slot 31 is enclosed in inside by 31 outer diameter, i.e. the first hole section 42.
The enlarged perspective of metering units 4 is as shown in figure 4, more clearly illustrate that shrinkage cavity 41 is construed as including in Fig. 2
One hole section 42 and the second hole section 43.
Metering units 4 can be by manufacturing with the identical or different material of valve body 1 or spool 2.
In the embodiment shown in Fig. 3 of Fig. 2, in the open position of spool 2, spool 2 and sealing element 24 are together from valve seat 3
On lift, therefore, fluid flow by between sealing element 24 and valve seat 3 circulation area, the circulation area of through slot 31 is (several logical
Be total circulation area of each through-hole in the case where hole) and shrinkage cavity 41 circulation area (the specially circulating face of the second hole section 43
Product) three determines, in the application, it is preferably arranged to when spool 2 is promoted to extreme higher position, the circulation area of shrinkage cavity 41 is less than
Circulation area between sealing element 24 and valve seat 3, and it is less than the circulation area of through slot 31.Setting in this way, so that in valve
When core 2 is moved to open position, the flow of fluid is determined by metering units 4.Therefore, do not have to excessively consider each member in valve module
The manufacture of part such as spool, valve body etc. and assembly precision and operation precision.
In this way, only need to consider that there are different circulation areas when design has the injector of different fluid flow demand
Metering units 4 do not need excessively to consider the precision of valve components, have saved cost, and simplify injector
Production process.
Metering units 4 can be made of material identical with spool 2, such as the metals such as stainless steel, copper, can also be by difference
Lower cost materials be made.
In this way, using the structure of the application, the control of the metered unit of injection flow degree of regulation of injector, and count
Amount unit is more easily manufactured and assembles, so that the manufacture of valve module, assembling and calibration difficulty greatly reduce.
Although the shape of the shrinkage cavity 41 of metering units 4 shown in Fig. 2-4 is the first hole section 42 and cylinder by truncated cone shape
The shape that second hole section 43 of shape is constituted, but other shapes also can be set into, the various of metering units 4 are shown in Fig. 5-6
Change case.
In Fig. 5, the section of the first hole section 42 becomes arc-shaped or parabola shaped or other spherings shapes.
In Fig. 6, the section of the first hole section 42 becomes cylindrical, and internal diameter is greater than the second hole section 43.
In Fig. 7, metering units 4 become simple plate shape, only have the through-hole for being equal to hole section 43.
In the variation of the metering units 4 of Fig. 5-7, the circulation of metering units 4 is determined by the size of hole section 43,
As long as hole section 43 can be communicated with the through slot 31 in valve seat 3, and its circulation is less than the circulation and valve seat and spool of through slot 31
Between gap circulation.
Fig. 5 and metering units shown in fig. 64 can be used in Fig. 2 and injector shown in Fig. 3.Metering units shown in Fig. 7
4 can be used in injector shown in Fig. 2.
Although the application is described in detail referring to embodiment, it is to be understood that, aforementioned is only exemplary embodiment
Illustration, the application is not limited to disclosed specific embodiment, to the modification of the disclosed embodiments, disclosed embodiment
The combination of feature and other embodiments are embraced in scope of the appended claims.
Claims (10)
1. a kind of natural gas injector, including valve module, which is characterized in that the valve module includes:
Valve body (1),
It is contained in the spool (2) in the valve body (1) in axial direction to move between open and closed positions, it is described
Spool (2) be biased by the spring in closed position and under external force and the collective effect of gas pressure from closed position be moved to beat
Open position, and
Valve seat (3) with fluid channel (31), when spool (2) is in the closed position, the end of spool (2) contacts valve seat (3)
To close fluid channel (31), and when spool (2) is in an open position spool (2) the end from valve seat (3) leave with
It opens fluid channel (31),
Wherein the injector further includes metering units (4), and the metering units (4) are respectively provided at described with the spool (2)
On the two opposite sides of valve seat (3), the metering units (4) are contained in valve body (1), have the fluid channel with valve seat (3)
(31) fluid flow of the port (41) being connected, the natural gas injector is determined by the circulation of the port (41).
2. natural gas injector according to claim 1, which is characterized in that the port (41) of the metering units (4)
Circulation area is less than or equal to the maximum flow area of the valve module when the spool (2) is in an open position.
3. natural gas injector according to claim 1 or 2, which is characterized in that the port (41) has the shape of shrinkage cavity
Shape, including the truncated cone shape section (42) that is gradually decreased on cross-sectional area along natural gas flow direction and from truncated cone shape section
(42) the cylindrical section (43) extended at minor diameter.
4. natural gas injector according to claim 1 or 2, which is characterized in that the metering units (4) by with spool
(2) identical or different material is made.
5. natural gas injector according to claim 1 or 2, which is characterized in that the metering units (4) are positioned to and valve
The end face of seat (3) is in contact.
6. natural gas injector according to claim 1 or 2, which is characterized in that the metering units (4) are contained in valve seat
(3) internal.
7. natural gas injector according to claim 1 or 2, which is characterized in that the metering units (4) have cylinder
Shape or cylindrical with truncated cone-shaped head.
8. natural gas injector according to claim 1 or 2, which is characterized in that the metering units (4) fixedly cooperate
It is internal to valve body (1).
9. natural gas injector according to claim 1 or 2, which is characterized in that the metering units (4) and the valve body
(1) sealing element is equipped between inner wall.
10. natural gas injector according to claim 1 or 2, which is characterized in that the metering units (4) is with institutes
State the plate shape of port (41).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821008458.1U CN208456748U (en) | 2018-06-28 | 2018-06-28 | Natural gas injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821008458.1U CN208456748U (en) | 2018-06-28 | 2018-06-28 | Natural gas injector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208456748U true CN208456748U (en) | 2019-02-01 |
Family
ID=65168936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821008458.1U Active CN208456748U (en) | 2018-06-28 | 2018-06-28 | Natural gas injector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208456748U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111482299A (en) * | 2019-01-25 | 2020-08-04 | 罗伯特·博世有限公司 | Gas injection device |
-
2018
- 2018-06-28 CN CN201821008458.1U patent/CN208456748U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111482299A (en) * | 2019-01-25 | 2020-08-04 | 罗伯特·博世有限公司 | Gas injection device |
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