CN205154288U - Spiral chamber is towards sodium valve with combustion chamber - Google Patents
Spiral chamber is towards sodium valve with combustion chamber Download PDFInfo
- Publication number
- CN205154288U CN205154288U CN201520896214.1U CN201520896214U CN205154288U CN 205154288 U CN205154288 U CN 205154288U CN 201520896214 U CN201520896214 U CN 201520896214U CN 205154288 U CN205154288 U CN 205154288U
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- CN
- China
- Prior art keywords
- valve
- sodium
- firing chamber
- shaft
- rushes
- 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.)
- Expired - Fee Related
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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Abstract
The utility model discloses a spiral chamber is towards sodium valve with combustion chamber, including valve head and valve stem, the valve stem is inside to be equipped with cylindrical cavity along its axial, and spatial axis dashes in for hemisphere face and cavity to the both ends face has sodium, and the valve stem surface is equipped with chromium -plated layer, and the valve head is equipped with the annular along its circumference, and the annular interlap has overlay and overlay surface for the circular conical surface, and what this spiral chamber is towards sodium valve with combustion chamber can be better walks valve neck and the heat conduction that valve head end face centre located to gather to it is even to make the valve heat dissipation.
Description
Technical field
The utility model relates to engine component field, and specifically a kind of helical cavity with firing chamber rushes sodium valve.
Background technique
Gasoline engine exhaust door in the past adopts solid exhaust valve, and exhaust valve head adopts resistant to elevated temperatures austenite material, and bar portion adopts martensitic material, then forms through processes such as welding, surface treatments.The exhaust valve of this structure, technique only can be used in delivery temperature and is no more than on the natural aspiration petrol engine of 750 DEG C.In supercharged engine, owing to employing compress inlet air technology (specifically having turbosupercharging, engine driven supercharging and two supercharging), make the burning pressure of explosion in cylinder than high during natural aspiration, the temperature in cylinder is also than high during natural aspiration, thus the temperature of exhaust valve raises accordingly.The temperature of Gu Paiqimenchu often exceeds the allowable temperature of material for exhaust valves, thus reduces exhaust valve working life, reduces heat dispersion.In order to address this problem, people are at engine valve stem boring formation one cavity of exhaust valve, the fusing point of sodium metal is 97.81 DEG C, under the prerequisite of rational hollow cavity volume, when valve works, temperature raises very fast, sodium metal becomes liquid state when high temperature from solid-state, move up and down in hollow cavity and constantly wash away valve face and valve stem, the heat load of valve face end is effectively delivered to valve stem, then by the water channel coolant exhaust door of cylinder cap, improve the thermal diffusivity of exhaust valve, the heat load of effective reduction valve face, in addition, the proportion of sodium metal is less, the total quality of valve diminishes, and the rigidity grow of valve, under equal conditions, the amount of deformation of valve is little, but the exhaust valve that existing hollow fills sodium structure has a problem: the heat of air valve cervix and valve end surface center is not easy to be conducted away smoothly, be the position that temperature is assembled, the heat dissipation uniformity of exhaust valve can be affected, reduce the exhaust valve life-span.
Therefore, for overcoming the above problems, need a kind of can being walked by the heat conduction that air valve cervix and valve end surface center gather preferably, thus the helical cavity making head portion that heat radiation have firing chamber uniformly rushes sodium valve.
Model utility content
In view of this, the purpose of this utility model overcomes defect of the prior art, and providing a kind of can walk the heat conduction that air valve cervix and valve end surface center gather preferably, thus the helical cavity making exhaust valve heat radiation have firing chamber uniformly rushes sodium valve.
The helical cavity with firing chamber of the present utility model rushes sodium valve, comprise valve head and valve stem, valve stem inside is provided with helical flow path, in helical flow path, punching has sodium, valve stem surface is provided with chromium coating, valve head is circumferentially with annular groove along it, is coated with overlay cladding and overlay surface is conical surface in annular groove; Described valve head bottom surface is provided with the firing chamber that axial section is " ω " type.
Further, the surface of contact of described annular groove and overlay cladding is arc surface;
Further, described valve stem comprises the shaft I and the shaft II that be connected coaxial with shaft I that are fixedly connected with valve head vertically, and shaft I is the solid of rotation that reduces gradually of radius from top to bottom, and shaft II is less than the cylindrical body of shaft I least radius for radius;
Further, the length that the helical cavity with this with firing chamber rushes the valve guide bushing that sodium valve coordinates is S
1, it is S that this helical cavity with firing chamber rushes sodium valve relative to the stroke that valve guide bushing moves
2, the axial length of described valve stem plated surface layers of chrome is S
1+ S
2;
Further, described valve stem is circumferentially provided with annular groove and groover rot diameter is less than valve collet internal diameter on the cylndrical surface on its top.
The beneficial effects of the utility model are: the helical cavity with firing chamber of the present utility model rushes sodium valve, helical flow path is conducive to the helical flow of guide wire sodium, compare the existing cylindrical valve rushing sodium chamber, the circulation path of helical flow path of the present utility model is longer, can strengthen the exchange heat speed of sodium metal in cavity and valve head; On the other hand, after arranging and rushing sodium chamber, the structural strength of valve stem will reduce, and the chromium coating on valve stem surface can make up the mechanical strength of valve stem, improves its heat resistance simultaneously; In addition, the overlay cladding that valve head circumference is arranged, this overlay cladding matches with air valve seat ring, effectively can improve the wearing and tearing of valve head; The firing chamber of " ω " type can produce eddy current, and then accelerates the mixing velocity of fuel oil-gas, makes burning more abundant, and reduce engine consumption, in addition, the distance of rushing sodium chamber and firing chamber can be shortened in the firing chamber of " ω " type, improves radiating effect.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further described:
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the partial enlarged drawing at A place in Fig. 1.
Embodiment
Fig. 1 is structural representation of the present utility model, Fig. 2 is the partial enlarged drawing at A place in Fig. 1, as shown in the figure, the helical cavity with firing chamber in the present embodiment rushes sodium valve, comprises valve head 3 and valve stem, and valve stem inside is provided with helical flow path 9, in helical flow path 9, punching has sodium, valve stem surface is provided with chromium coating 6, and valve head 3 is circumferentially with annular groove 8 along it, be coated with overlay cladding 2 in annular groove 8 and overlay cladding 2 surface for conical surface; Helical flow path 9 in valve stem can guide liquid metal sodium helical flow, compare the valve that existing employing circular cylindrical cavity carries out rushing sodium, the helical flow path 9 of this structural type of the utility model can extend the circulation length of runner, can strengthen the exchange heat speed of sodium metal in cavity and valve head 3; In addition, the overlay cladding 2 that valve head 3 circumference is arranged, this overlay cladding 2 matches with air valve seat ring, effectively can improve the wearing and tearing of valve head 3, and the chromium coating 6 on valve stem surface can improve mechanical strength and the heat resistance of valve; The firing chamber of " ω " type can produce eddy current, and then accelerates the mixing velocity of fuel oil-gas, makes burning more abundant, reduces engine consumption.
In the present embodiment, described annular groove 8 is arc surface 11 with the surface of contact of overlay cladding 2, and this arc surface 11 can increase overlay cladding 2 and the area of contact of valve head 3, ensures that overlay cladding 2 is firmly connected with valve head 3.
In the present embodiment, described valve stem comprises the shaft I 4 and the shaft II 5 that be connected coaxial with shaft I 4 that are fixedly connected with valve head 3 vertically, shaft I 4 is the solid of rotation that reduces gradually of radius from top to bottom, shaft II 5 is less than the cylindrical body of shaft I 4 least radius for radius, " lower end " as herein described refers to towards valve head 3 one end, end opposite is " upper end ", shaft I 4 is the changeover portion between valve head 3 and shaft II 5, this seamlessly transit can avoid valve stem occur stress concentrate, simultaneously due to shaft I 4 at work, its temperature reduces from bottom to up gradually, adopt the shaft I 4 of this structure that it can be made to dispel the heat evenly.
In the present embodiment, the length that the helical cavity having firing chamber with this rushes the valve guide bushing that sodium valve coordinates is S
1, it is S that this helical cavity with firing chamber rushes sodium valve relative to the stroke that valve guide bushing moves
2, the axial length of described valve stem plated surface layers of chrome is S
1+ S
2as shown in Figure 1, dot-dash wire frame region is chromium coating 6, chromium coating 6, for being slidably matched with valve guide bushing, to reduce wearing and tearing, is the utilization ratio of raising chromium coating 6, cost-saving, the axial length of the chromium coating 6 that the present embodiment adopts is length and the valve stroke sum of valve guide bushing, ensures that valve stem is all coated with chromium coating 6 with the surface of contact of valve guide bushing in reciprocating process, thus strengthens its wear resistance.
In the present embodiment, described valve stem is circumferentially provided with rod slot 7 on the cylndrical surface on its top and rod slot 7 end diameter is less than valve collet internal diameter, ensures that valve stem is connected with valve reliable lock.
What finally illustrate is, above embodiment is only in order to illustrate the technical solution of the utility model and unrestricted, although be described in detail the utility model with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify to the technical solution of the utility model or equivalent replacement, and not departing from aim and the scope of technical solutions of the utility model, it all should be encompassed in the middle of right of the present utility model.
Claims (5)
1. the helical cavity with firing chamber rushes a sodium valve, comprises valve head and valve stem, it is characterized in that: described valve stem inside is provided with spiral flow channel, and in described helical flow path, punching has sodium; Described valve stem surface is provided with chromium coating; Described valve head is circumferentially with annular groove along it; Be coated with overlay cladding in described annular groove and overlay surface is conical surface, described valve head bottom surface is provided with the firing chamber that axial section is " ω " type.
2. the helical cavity with firing chamber according to claim 1 rushes sodium valve, it is characterized in that: the surface of contact of described annular groove and overlay cladding is arc surface.
3. the helical cavity with firing chamber according to claim 2 rushes sodium valve, it is characterized in that: described valve stem comprises the shaft I and the shaft II that be connected coaxial with shaft I that are fixedly connected with valve head vertically; Described shaft I is the solid of rotation that reduces gradually of radius from top to bottom; Described shaft II is less than the cylindrical body of shaft I least radius for radius.
4. the helical cavity with firing chamber according to claim 3 rushes sodium valve, it is characterized in that: the length that the helical cavity having firing chamber with this rushes the valve guide bushing that sodium valve coordinates is S
1, it is S that this helical cavity with firing chamber rushes sodium valve relative to the stroke that valve guide bushing moves
2, the axial length of described valve stem plated surface layers of chrome is S
1+ S
2.
5. the helical cavity with firing chamber according to claim 4 rushes sodium valve, it is characterized in that: described valve stem is circumferentially provided with rod slot on the cylndrical surface on its top and rod slot diameter is less than valve collet internal diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520896214.1U CN205154288U (en) | 2015-11-10 | 2015-11-10 | Spiral chamber is towards sodium valve with combustion chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520896214.1U CN205154288U (en) | 2015-11-10 | 2015-11-10 | Spiral chamber is towards sodium valve with combustion chamber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205154288U true CN205154288U (en) | 2016-04-13 |
Family
ID=55689995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520896214.1U Expired - Fee Related CN205154288U (en) | 2015-11-10 | 2015-11-10 | Spiral chamber is towards sodium valve with combustion chamber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205154288U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2574449A (en) * | 2018-06-07 | 2019-12-11 | Caterpillar Energy Solutions Gmbh | Valve for an internal combustion engine |
-
2015
- 2015-11-10 CN CN201520896214.1U patent/CN205154288U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2574449A (en) * | 2018-06-07 | 2019-12-11 | Caterpillar Energy Solutions Gmbh | Valve for an internal combustion engine |
| GB2574449B (en) * | 2018-06-07 | 2020-10-07 | Caterpillar Energy Solutions Gmbh | Valve for an internal combustion engine |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160413 Termination date: 20161110 |