CN105298581A - Spiral flow-guide efficient heat exchange type sodium charging air valve - Google Patents
Spiral flow-guide efficient heat exchange type sodium charging air valve Download PDFInfo
- Publication number
- CN105298581A CN105298581A CN201510733480.7A CN201510733480A CN105298581A CN 105298581 A CN105298581 A CN 105298581A CN 201510733480 A CN201510733480 A CN 201510733480A CN 105298581 A CN105298581 A CN 105298581A
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- China
- Prior art keywords
- valve
- air valve
- efficient heat
- sodium
- heat exchanging
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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
Abstract
The invention discloses a spiral flow-guide efficient heat exchange type sodium charging air valve which comprises an air valve head and an air valve rod. A cylindrical cavity is formed in the air valve rod in the axial direction of the air valve rod. The two axial end faces of the cavity are semi-spherical faces, and sodium is charged in the cavity. The surface of the air valve rod is provided with a chromium coating. A ring groove is formed in the air valve head in the circumferential direction of the air valve head. An overlaying layer is arranged in the ring groove in a covering manner, and the surface of the overlaying layer is a conical surface. According to the spiral flow-guide efficient heat exchange type sodium charging air valve, heat accumulated on the neck of the air valve and the center of the end face of the air valve head can be conducted away well, and therefore the air valve is uniform in heat radiation.
Description
Technical field
The present invention relates to engine component field, specifically a kind of spiral stream guidance high efficient heat exchanging formula 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 make head portion that uniform spiral stream guidance high efficient heat exchanging formula of dispelling the heat rush sodium valve.
Summary of the invention
In view of this, the object of the invention is to overcome defect of the prior art, providing a kind of can walk the heat conduction that air valve cervix and valve end surface center gather preferably, thus makes exhaust valve uniform spiral stream guidance high efficient heat exchanging formula of dispelling the heat rush sodium valve.
Spiral stream guidance high efficient heat exchanging formula of the present invention rushes sodium valve, comprise valve head and valve stem, described valve head outer side wall is provided with around its axially extended helical blade, circular cylindrical cavity is provided with along axle in described valve stem, described circular cylindrical cavity is radially provided with dividing plate and circular cylindrical cavity is separated to form ring runner, the axial both ends of the surface of described circular cylindrical cavity are hemisphere face, in ring runner, 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;
Further, the surface of contact of described annular groove and overlay cladding is arc surface;
Further, described valve head bottom surface is provided with the circular groove coaxial with valve head;
Further, the length of rushing with this spiral stream guidance high efficient heat exchanging formula the valve guide bushing that sodium valve coordinates is S
1, it is S that this spiral stream guidance high efficient heat exchanging formula 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 invention has the beneficial effects as follows: spiral stream guidance high efficient heat exchanging formula of the present invention rushes sodium valve, helical blade on valve head drives valve rotation by the airflow scouring helical blade of discharging, both the circulation of gas can have been improved, turn increase the rigidity of valve, the more important thing is the carbon distribution reducing valve and valve seat, thus ensure the sealing that valve is good and longer life-span, ring runner is conducive to circulating of guide wire sodium, the exchange heat speed of sodium metal in cavity and valve head can be strengthened, the axial both ends of the surface of cavity in valve stem are hemisphere face, compare existing employing plane as the valve rushing sodium chamber both ends of the surface, rushing under the identical condition of sodium chamber diameter, the heat exchange area rushing sodium chamber and valve head of this structural type of the present invention is larger, the exchange heat speed of sodium metal in cavity and valve head can be strengthened, on the other hand, cavity can reduce the distance of valve head end face center and cavity towards the hemisphere face of valve head side, improves the heat radiation of valve head end face center region, make valve integral heat sink even with this, 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.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described:
Fig. 1 is structural representation of the present invention;
Fig. 2 is the partial enlarged drawing at A place in Fig. 1;
Fig. 3 is the partial enlarged drawing at B place in Fig. 1;
Fig. 4 is the sectional view at C place in Fig. 1;
Fig. 5 is the structural representation of helical blade of the present invention.
Embodiment
Fig. 1 is structural representation of the present invention, Fig. 2 is the partial enlarged drawing at A place in Fig. 1, as shown in the figure, spiral stream guidance high efficient heat exchanging formula in the present embodiment rushes sodium valve, comprise valve head 3 and valve stem 5, described valve head 3 outer side wall is provided with around its axially extended helical blade 4, circular cylindrical cavity is provided with along axle in described valve stem 5, described circular cylindrical cavity is radially provided with dividing plate 10 and circular cylindrical cavity is separated to form ring runner 9, the axial both ends of the surface of described circular cylindrical cavity are hemisphere face 11, in ring runner 9, punching has sodium, valve stem 5 surface is provided with chromium coating 6, 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, ring runner 9 in valve stem 5 can guide liquid metal sodium to circulate, compare the valve that existing employing circular cylindrical cavity carries out rushing sodium, the ring runner 9 of this structural type of the present invention is conducive to circulating of guide wire sodium, 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 5 surface can improve mechanical strength and the heat resistance of valve.
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 head 3 bottom surface is provided with the circular groove 1 coaxial with valve head 3, and this circular groove 1, as a part for engine chamber, can adjust the compression ratio of motor in certain limit by the size adjusting circular groove 1.
In the present embodiment, the length of rushing the valve guide bushing that sodium valve coordinates with this spiral stream guidance high efficient heat exchanging formula is S
1, it is S that this spiral stream guidance high efficient heat exchanging formula rushes sodium valve relative to the stroke that valve guide bushing moves
2, the axial length of described valve stem 5 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 5 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 5 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 5 is connected with valve reliable lock.
What finally illustrate is, above embodiment is only in order to illustrate technological scheme of the present invention and unrestricted, although with reference to preferred embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that, can modify to technological scheme of the present invention or equivalent replacement, and not departing from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.
Claims (5)
1. a spiral stream guidance high efficient heat exchanging formula rushes sodium valve, comprise valve head and valve stem, it is characterized in that: described valve head outer side wall is provided with around its axially extended helical blade, circular cylindrical cavity is provided with along axle in described valve stem, described circular cylindrical cavity is radially provided with dividing plate and circular cylindrical cavity is separated to form ring runner, the axial both ends of the surface of described circular cylindrical cavity are hemisphere face, and in described ring runner, punching has sodium; Described valve stem surface is provided with chromium coating; Described valve head is circumferentially with annular groove along it; Overlay cladding is coated with and overlay surface is conical surface in described annular groove.
2. spiral stream guidance high efficient heat exchanging formula 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. spiral stream guidance high efficient heat exchanging formula according to claim 2 rushes sodium valve, it is characterized in that: described valve head bottom surface is provided with the circular groove coaxial with valve head.
4. spiral stream guidance high efficient heat exchanging formula according to claim 3 rushes sodium valve, it is characterized in that: the length of rushing the valve guide bushing that sodium valve coordinates with this spiral stream guidance high efficient heat exchanging formula is S
1, it is S that this spiral stream guidance high efficient heat exchanging formula 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. spiral stream guidance high efficient heat exchanging formula 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 |
|---|---|---|---|
| CN201510733480.7A CN105298581A (en) | 2015-10-30 | 2015-10-30 | Spiral flow-guide efficient heat exchange type sodium charging air valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510733480.7A CN105298581A (en) | 2015-10-30 | 2015-10-30 | Spiral flow-guide efficient heat exchange type sodium charging air valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105298581A true CN105298581A (en) | 2016-02-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510733480.7A Pending CN105298581A (en) | 2015-10-30 | 2015-10-30 | Spiral flow-guide efficient heat exchange type sodium charging air valve |
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| CN (1) | CN105298581A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110753787A (en) * | 2017-06-20 | 2020-02-04 | 马勒国际有限公司 | Piston for an internal combustion engine with liquid metal cooling |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101713307A (en) * | 2009-12-15 | 2010-05-26 | 重庆长安汽车股份有限公司 | Engine valve structure |
| CN201924985U (en) * | 2010-12-30 | 2011-08-10 | 广州汽车集团股份有限公司 | Engine exhaust valve |
| US20150240675A1 (en) * | 2012-10-02 | 2015-08-27 | Nittan Valve Co., Ltd. | Hollow poppet valve |
| CN205089401U (en) * | 2015-10-30 | 2016-03-16 | 重庆奇甫机械有限责任公司 | High -efficient heat transfer formula towards sodium valve of automatically cleaning |
-
2015
- 2015-10-30 CN CN201510733480.7A patent/CN105298581A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101713307A (en) * | 2009-12-15 | 2010-05-26 | 重庆长安汽车股份有限公司 | Engine valve structure |
| CN201924985U (en) * | 2010-12-30 | 2011-08-10 | 广州汽车集团股份有限公司 | Engine exhaust valve |
| US20150240675A1 (en) * | 2012-10-02 | 2015-08-27 | Nittan Valve Co., Ltd. | Hollow poppet valve |
| CN205089401U (en) * | 2015-10-30 | 2016-03-16 | 重庆奇甫机械有限责任公司 | High -efficient heat transfer formula towards sodium valve of automatically cleaning |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110753787A (en) * | 2017-06-20 | 2020-02-04 | 马勒国际有限公司 | Piston for an internal combustion engine with liquid metal cooling |
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Application publication date: 20160203 |
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