CN208203457U - Injector and its valve seat - Google Patents
Injector and its valve seat Download PDFInfo
- Publication number
- CN208203457U CN208203457U CN201820437473.1U CN201820437473U CN208203457U CN 208203457 U CN208203457 U CN 208203457U CN 201820437473 U CN201820437473 U CN 201820437473U CN 208203457 U CN208203457 U CN 208203457U
- Authority
- CN
- China
- Prior art keywords
- valve seat
- valve
- injector
- coating
- chrome
- 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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Links
- 238000007789 sealing Methods 0.000 claims abstract description 31
- 239000011248 coating agent Substances 0.000 claims abstract description 26
- 238000000576 coating method Methods 0.000 claims abstract description 26
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 22
- CXOWYMLTGOFURZ-UHFFFAOYSA-N azanylidynechromium Chemical compound [Cr]#N CXOWYMLTGOFURZ-UHFFFAOYSA-N 0.000 claims abstract description 17
- 238000009792 diffusion process Methods 0.000 claims description 15
- 230000007704 transition Effects 0.000 claims description 7
- 240000007594 Oryza sativa Species 0.000 claims 1
- 235000007164 Oryza sativa Nutrition 0.000 claims 1
- 235000009566 rice Nutrition 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Fuel-Injection Apparatus (AREA)
Abstract
The application provides a kind of injector and the valve seat for injector, and valve seat has the sealing surface to accept sealing element, wherein having coating on the sealing surface, the coating includes chromium nitride layer and the outer layers of chrome on the outside of chromium nitride layer.There is stable sealing effect using the valve seat and injector of the application.
Description
Technical field
The application in relation to a kind of injector and its valve seat, especially a kind of injector with stable sealing effect and its
Valve seat.
Background technique
Space of the injector high-pressure fluid to be injected into needs has valve module to control injection in injector
Device opens or closes.Generally there is valve seal and valve seat, valve seal can be resisted against on valve seat, be formed close in valve module
Envelope, to prevent fluid from entering the space needed when not needed.In addition, valve seal is lifted off a seat when needing valve to open
On correspondence sealing surface, so that fluid be made to enter.Be accurately controlled to reach, valve seal sealing surface corresponding with valve seat it is steady
Determine sealing effect to be necessary.
However, due to being inevitably present particulate matter in fluid, if these particulate matters reside in valve seal and valve
Between seat sealing surface, when valve seal is taken a seat, the sealing surface surface on valve seat can be made to form scratch, the accumulation of scratch can make close
The effect of envelope gradually generates variation.
Therefore, it is necessary to a kind of new injector and its valve seats, with stable sealing effect.
Utility model content
The application's is designed to provide a kind of injector and its valve seat with stabilized seal effect.
To complete foregoing invention purpose, the application provides a kind of valve seat for injector, has to accept sealing element
Sealing surface, wherein have coating on the sealing surface, the coating includes chromium nitride layer and outer on the outside of chromium nitride layer
Layers of chrome.
The application also has following characteristics, has interior layers of chrome on the inside of the chromium nitride layer.
The application also has following characteristics, and the outer layers of chrome is with a thickness of 0.3-1 microns, and preferably 0.6 micron.
The application also has following characteristics, and the chromium nitride layer is with a thickness of 2.5-4 microns, and preferably 3.5 microns.
The application also has following characteristics, and the interior layers of chrome is with a thickness of 0.1-0.5 microns, and preferably 0.3 micron.
The application also has following characteristics, and the valve seat has the seat surface being in contact with ejector body, and the seat surface is not
With the coating.
The application also has following characteristics, has transition face, the transition mask between the sealing surface and the seat surface
There is the coating.
The application also has following characteristics, has accommodating chamber in the valve seat, and the sealing surface is in the accommodating chamber,
The valve seat further has the diffusion hole being connected with the accommodating chamber, has the coating on the diffusion hole.
The application also has following characteristics, and the diffusion hole is further communicated with the valve opening that diameter is less than the diffusion hole,
Do not have the coating on the valve opening, the injector is the injector for common rail system.
To complete the above application purpose, the application also provides a kind of injector, including ejector body, in the injector
Valve chamber is offered in ontology, wherein valve seat as described above is provided in the valve chamber.
Using injector and valve seat provided herein, the sealing effect between sealing element and the sealing surface of valve seat can be made
It is more stable.
Detailed description of the invention
The exemplary embodiment of the application is described in detail below with reference to the accompanying drawings, it should be understood that described below
Embodiment is only used for explaining the application, without restricting to scope of the present application, in appended attached drawing:
Fig. 1 is the cross-sectional view of the first embodiment of the application injector.
Fig. 2 is the perspective view of one embodiment of the application valve seat.
Fig. 3 is the cross-sectional view of one embodiment of the application valve seat.
Fig. 4 is the schematic diagram of one embodiment of the coating on the application valve seat.
Fig. 5 is the schematic diagram of another embodiment of the coating on the application valve seat.
Specific embodiment
In different drawings, the same or similar component is presented with like reference characters.
It should be appreciated that attached drawing is only used for being illustrated the application, the wherein size, proportionate relationship of component and component
Number is not as the limitation to the application.
Refering to Figure 1, one embodiment of the injector 1 of the application is used for common rail system, especially a kind of diesel oil
Injector.Injector 1 shown in Fig. 1 includes ejector body 30, and valve chamber 301 is offered in ejector body 30.In valve chamber
There is continuing surface (not labeled), a valve seat 10, which is set in valve chamber 301, to be connected on the continuing surface, with sealing element 20 in 301
The switch with control valve is combined with valve seat 10.
Fig. 2 to Fig. 3 is please referred to, which show one embodiment of the valve seat 10 of the application.10 top two sides of valve seat are formed
Convex shoulder 11, in two sides, 11 lower surface of convex shoulder forms the seat surface 105 of valve seat 10, which is connected on aforementioned continuing surface, generally
Keep the seat surface 105 and continuing surface in sealing contact by pressing.The upper surface of valve seat 10 is inward-facing to be concavely formed accommodating chamber, accommodating chamber
The interior sealing surface 101 having to accept sealing element 20, has vertical diffusion hole 107, the diffusion below sealing surface 101
Hole 107 is connected with accommodating chamber.In the lower section of the diffusion hole 107, there is the valve opening 108 being connected with diffusion hole 107, it is described
The diameter of valve opening 108 is less than diffusion hole 107.Transitional surface between sealing surface 101 and seat surface 105, defines in this application
For transition face 106.Being formed on sealing surface 101 in this application has coating, on above-mentioned seat surface 105, without coating.In this Shen
In the present embodiment please, the tool of foregoing transition face 106 has coating, coating is formed on the diffusion hole 107, in the valve opening
There is no coating on 108.But it in other embodiments, also can choose on transition face 106 and diffusion hole 107 and be not provided with coating.
It please refers to shown in Fig. 4, is the schematic diagram of one embodiment of coating involved in the application, the coating includes
The chromium nitride layer 102 being set on basal layer and the outer layers of chrome 103 in 102 outside of chromium nitride layer.The outer layers of chrome 103 is thick
Degree is 0.3-1 microns, preferably 0.6 micron.The chromium nitride layer 102 is with a thickness of 2.5-4 microns, and preferably 3.5 microns.
It please refers to shown in Fig. 5, is the schematic diagram of another embodiment of coating involved in the application.The coating packet
It includes and is set to interior layers of chrome 104 on basal layer, there is chromium nitride layer 102 on the outside of the interior layers of chrome 104, be in the chromium nitride layer
The outer layers of chrome 103 in 102 outsides.The interior layers of chrome 104 is with a thickness of 0.1-0.5 microns, and preferably 0.3 micron.The outer layers of chrome 103
With a thickness of 0.3-1 microns, preferably 0.6 micron.The chromium nitride layer 102 is with a thickness of 2.5-4 microns, and preferably 3.5 microns.
The application is described only in conjunction with the most practical preferred embodiment being presently considered above, it is to be understood that
Above description is not the limitation to the application, and the application is also not limited to the example above, the ordinary skill people of the art
The variations, modifications, additions or substitutions that member is made in the essential scope of the application, also should belong to the protection scope of the application.
Claims (13)
1. a kind of valve seat (10) for injector has the sealing surface (101) to accept sealing element (20), feature exists
In: there is coating, the coating includes chromium nitride layer (102) and is on the outside of chromium nitride layer (102) on the sealing surface (101)
Outer layers of chrome (103).
2. valve seat (10) as described in claim 1, it is characterised in that: have interior layers of chrome on the inside of the chromium nitride layer (102)
(104)。
3. valve seat (10) as claimed in claim 1 or 2, it is characterised in that: the outer layers of chrome (103) is with a thickness of 0.3-1 microns.
4. valve seat (10) as claimed in claim 3, it is characterised in that: the outer layers of chrome (103) is with a thickness of 0.6 micron.
5. valve seat (10) as claimed in claim 1 or 2, it is characterised in that: the chromium nitride layer (102) is micro- with a thickness of 2.5-4
Rice.
6. valve seat (10) as claimed in claim 5, it is characterised in that: the chromium nitride layer (102) is with a thickness of 3.5 microns.
7. valve seat (10) as claimed in claim 2, it is characterised in that: the interior layers of chrome (104) is with a thickness of 0.1-0.5 microns.
8. valve seat (10) as claimed in claim 7, it is characterised in that: the interior layers of chrome (104) is with a thickness of 0.3 micron.
9. valve seat (10) as claimed in claim 1 or 2, it is characterised in that: the valve seat (10) has and ejector body
(30) seat surface (105) being in contact, the seat surface (105) do not have the coating.
10. valve seat (10) as claimed in claim 9, which is characterized in that the sealing surface (101) and the seat surface (105) it
Between have transition face (106), the transition face (106) have the coating.
11. valve seat (10) as claimed in claim 1 or 2, which is characterized in that there is accommodating chamber in the valve seat (10), it is described
Sealing surface is in the accommodating chamber, and the valve seat further has the diffusion hole (107) being connected with the accommodating chamber, in institute
Stating has the coating on diffusion hole (107).
12. valve seat (10) as claimed in claim 11, which is characterized in that the diffusion hole (107) is further communicated with diameter
Less than the valve opening (108) of the diffusion hole (107), on the valve opening (108) do not have the coating, the injector be for
The injector of common rail system.
13. a kind of injector (1), including ejector body (30) offer valve chamber in the ejector body (30)
(301), which is characterized in that be arranged in the valve chamber (301) just like the described in any item valve seats of claim 1 to 12 (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820437473.1U CN208203457U (en) | 2018-03-29 | 2018-03-29 | Injector and its valve seat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820437473.1U CN208203457U (en) | 2018-03-29 | 2018-03-29 | Injector and its valve seat |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208203457U true CN208203457U (en) | 2018-12-07 |
Family
ID=64525877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820437473.1U Active CN208203457U (en) | 2018-03-29 | 2018-03-29 | Injector and its valve seat |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208203457U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110318926A (en) * | 2018-03-29 | 2019-10-11 | 罗伯特·博世有限公司 | Injector and its valve seat |
-
2018
- 2018-03-29 CN CN201820437473.1U patent/CN208203457U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110318926A (en) * | 2018-03-29 | 2019-10-11 | 罗伯特·博世有限公司 | Injector and its valve seat |
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |