CN105240081A - Valve with sodium-filled spiral conical cavity - Google Patents
Valve with sodium-filled spiral conical cavity Download PDFInfo
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- CN105240081A CN105240081A CN201510726465.XA CN201510726465A CN105240081A CN 105240081 A CN105240081 A CN 105240081A CN 201510726465 A CN201510726465 A CN 201510726465A CN 105240081 A CN105240081 A CN 105240081A
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- Prior art keywords
- valve
- sodium
- head
- conical cavity
- rush
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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 invention discloses a valve with a sodium-filled spiral conical cavity. The valve comprises a valve head and a valve rod; a spiral runner is arranged inside the valve rod; the valve head is internally provided with the head sodium-filled cavity communicated with the spiral runner; the spiral runner is filled with sodium; the surface of the valve rod is provided with a chromium plating layer; an annular groove is formed in the circumferential direction of the valve head and internally covered with a surfacing layer; the surface of the surfacing layer is a conical face. The valve with the sodium-filled spiral conical cavity can better transfer heat accumulated at the neck portion of the valve and the center of the end face of the valve head away, so that heat dissipation of the valve is uniform.
Description
Technical field
The present invention relates to engine component field, specifically a kind of have the valve that can rush the spiral conical cavity of sodium.
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 heat radiation have the valve that can rush the spiral conical cavity of sodium uniformly.
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 heat radiation have the valve that can rush the spiral conical cavity of sodium uniformly.
Of the present invention have the valve that can rush the spiral conical cavity of sodium, comprises valve head and valve stem, and valve stem inside is provided with helical flow path, and described valve head inside is provided with the head be communicated with helical flow path and rushes sodium chamber; The internal diameter that described head rushes sodium chamber reduces from lower to upper gradually, and punching has sodium in helical flow path, and valve stem surface is provided with chromium coating, and 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 with this with the valve guide bushing that the valve that can rush the spiral conical cavity of sodium coordinates is S
1, this has the valve that can rush the spiral conical cavity of sodium is S 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: of the present invention have the valve that can rush the spiral conical cavity of sodium, 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 invention is longer, can strengthen the exchange heat speed of sodium metal in cavity and valve head; The head sodium metal rushed in sodium chamber effectively can absorb the heat of valve head; The head of taper rushes the structural strength that sodium chamber can ensure head portion that; 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 structural representation that helical flow path of the present invention and head rush sodium chamber.
Embodiment
Fig. 1 is structural representation of the present invention, and Fig. 2 is the partial enlarged drawing at A place in Fig. 1, and as shown in the figure, have the valve that can rush the spiral conical cavity of sodium in the present embodiment, comprise valve head 3 and valve stem 4, valve stem 4 inside is provided with helical flow path 9; Described valve head 3 inside is provided with the head be communicated with helical flow path 9 and rushes sodium chamber 10, the internal diameter that described head rushes sodium chamber 10 reduces from lower to upper gradually, in helical flow path 9, punching has sodium, valve stem 4 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; Helical flow path 9 in valve stem 4 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 present invention 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 4 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 with this with the valve guide bushing that the valve that can rush the spiral conical cavity of sodium coordinates is S
1, this has the valve that can rush the spiral conical cavity of sodium is S relative to the stroke that valve guide bushing moves
2, the axial length of described valve stem 4 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 4 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 4 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 4 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. there is the valve that can rush the spiral conical cavity of sodium, comprise valve head and valve stem, it is characterized in that: described valve stem inside is provided with helical flow path; Described valve head inside is provided with the head be communicated with helical flow path and rushes sodium chamber, and the internal diameter that described head rushes sodium chamber reduces from lower to upper gradually; 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; Overlay cladding is coated with and overlay surface is conical surface in described annular groove.
2. according to claim 1 have the valve that can rush the spiral conical cavity of sodium, it is characterized in that: the surface of contact of described annular groove and overlay cladding is arc surface.
3. according to claim 2 have the valve that can rush the spiral conical cavity of sodium, it is characterized in that: described valve head bottom surface is provided with the circular groove coaxial with valve head.
4. according to claim 3 have the valve that can rush the spiral conical cavity of sodium, it is characterized in that: the length with this with the valve guide bushing that the valve that can rush the spiral conical cavity of sodium coordinates is S
1, this has the valve that can rush the spiral conical cavity of sodium is S 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. according to claim 4 have the valve that can rush the spiral conical cavity of sodium, 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 |
---|---|---|---|
CN201510726465.XA CN105240081A (en) | 2015-10-30 | 2015-10-30 | Valve with sodium-filled spiral conical cavity |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201510726465.XA CN105240081A (en) | 2015-10-30 | 2015-10-30 | Valve with sodium-filled spiral conical cavity |
Publications (1)
Publication Number | Publication Date |
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CN105240081A true CN105240081A (en) | 2016-01-13 |
Family
ID=55037872
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201510726465.XA Pending CN105240081A (en) | 2015-10-30 | 2015-10-30 | Valve with sodium-filled spiral conical cavity |
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Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2162304A (en) * | 1937-01-23 | 1939-06-13 | Motoraktieselskapet Av 1935 | Internally cooled valve for combustion engines |
GB898588A (en) * | 1959-12-17 | 1962-06-14 | Sulzer Ag | Valve spring assemblies |
US3945356A (en) * | 1972-02-10 | 1976-03-23 | Societe D'etudes De Machines Thermiques | Cooled exhaust valve and methods of manufacture thereof |
CN202900355U (en) * | 2012-10-31 | 2013-04-24 | 浙江吉利汽车研究院有限公司杭州分公司 | Automobile engine exhaust valve |
CN204402610U (en) * | 2014-12-19 | 2015-06-17 | 重庆奇甫机械有限责任公司 | Rush sodium valve |
CN205315064U (en) * | 2015-10-30 | 2016-06-15 | 重庆奇甫机械有限责任公司 | Spiral toper chamber is towards sodium valve |
-
2015
- 2015-10-30 CN CN201510726465.XA patent/CN105240081A/en active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2162304A (en) * | 1937-01-23 | 1939-06-13 | Motoraktieselskapet Av 1935 | Internally cooled valve for combustion engines |
GB898588A (en) * | 1959-12-17 | 1962-06-14 | Sulzer Ag | Valve spring assemblies |
US3945356A (en) * | 1972-02-10 | 1976-03-23 | Societe D'etudes De Machines Thermiques | Cooled exhaust valve and methods of manufacture thereof |
CN202900355U (en) * | 2012-10-31 | 2013-04-24 | 浙江吉利汽车研究院有限公司杭州分公司 | Automobile engine exhaust valve |
CN204402610U (en) * | 2014-12-19 | 2015-06-17 | 重庆奇甫机械有限责任公司 | Rush sodium valve |
CN205315064U (en) * | 2015-10-30 | 2016-06-15 | 重庆奇甫机械有限责任公司 | Spiral toper chamber is towards sodium valve |
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Application publication date: 20160113 |