CN201924985U - Engine exhaust valve - Google Patents
Engine exhaust valve Download PDFInfo
- Publication number
- CN201924985U CN201924985U CN2010206901884U CN201020690188U CN201924985U CN 201924985 U CN201924985 U CN 201924985U CN 2010206901884 U CN2010206901884 U CN 2010206901884U CN 201020690188 U CN201020690188 U CN 201020690188U CN 201924985 U CN201924985 U CN 201924985U
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- Prior art keywords
- valve
- engine exhaust
- exhaust port
- port according
- valve retainer
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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 an engine exhaust valve, comprising a valve disc and a valve rod, wherein the axes of the valve disc and the valve rod are superposed, a hollow cavity extends from the valve disc to the valve rod along the axis, and the hollow cavity is filled with natrium; the volume for filling natrium in the hollow cavity of the valve accounts for 61-68 percent of the volume of the hollow cavity in percentage; and one end of the hollow cavity, near the valve disc, has a distance of 3.8-5.2mm away from the plane where the horizontal projection of the end surface of the valve disc is positioned. The utility model aims at providing the engine exhaust valve to better transmit heat accumulated at the valve neck part and the center of the end surface of the valve disc through controlling the position of the hollow cavity of the exhaust valve rod part, so that the exhaust valve disperses heat uniformly.
Description
Technical field
The utility model relates to a kind of engine exhaust port, and this exhaust valve structure is applicable to turbosupercharging, engine driven supercharging, two gasoline supercharging engine, is particularly useful for the turbosupercharging petrol engine.
Background technique
Petrol engine exhaust valve in the past is to adopt solid exhaust valve, and exhaust valve dish portion adopts resistant to elevated temperatures austenite material, and bar portion adopts martensitic material, forms through processes such as welding, surface treatments then.The exhaust valve of this structure, technology can only use on delivery temperature is no more than 750 ℃ natural aspiration petrol engine.
In supercharged engine, owing to used compress inlet air technology (turbosupercharging, engine driven supercharging and two supercharging are specifically arranged), height when making burning pressure of explosion in the cylinder, the temperature in cylinder height during also than natural aspiration than natural aspiration, thus the temperature of exhaust valve raises accordingly.The temperature of Gu Paiqimenchu usually surpasses the allowable temperature of exhaust valve material, thereby reduces exhaust valve working life, reduces heat dispersion.In order to address this problem, people form a cavity in the engine valve stem boring of exhaust valve, and fill the sodium of some in cavity.Because the fusing point lower (97.8 ℃) of sodium, in engine operation process, the temperature of exhaust valve is easy to reach the fusing point of sodium and makes it to melt.Utilize Liquid Sodium mobile in the hole of valve stem that the heat of exhaust valve is passed to valve guide bushing rapidly, thereby reduce the heat load of exhaust valve.
The exhaust valve that above-mentioned hollow is filled the sodium structure has a problem: the heat of air valve cervix and valve retainer end face center is not easy to be conducted away smoothly, is the position that temperature is assembled, and can influence the heat radiation uniformity of exhaust valve, reduces the exhaust valve life-span.
The model utility content
For the hollow that solves prior art is filled the uneven technical problem of sodium exhaust valve heat radiation, the utility model provides a kind of engine exhaust port, the position of the cavity by control exhaust valve rod portion, the heat that air valve cervix and valve retainer end face center are gathered conducts away preferably, thereby makes the exhaust valve heat radiation evenly.
The purpose of this utility model is achieved through the following technical solutions: a kind of engine exhaust port, comprise valve retainer and valve stem, valve retainer and valve stem shaft axis overlap, one cavity extends to valve stem along shaft axis from valve retainer, fill sodium in the cavity, the distance between the plane, horizontal projection place of an end of the close valve retainer of described cavity and the end face of valve retainer is 3.8mm～5.2mm.
Adopt the exhaust valve of said structure, the heat that can be preferably air valve cervix and valve disk center place be gathered conducts away, thereby makes the exhaust valve heat radiation evenly.
Described cavity is preferably 4.0mm～5.0mm near the distance on an end of valve retainer and the plane, horizontal projection place of the end face of valve retainer, so more helps conducting rapidly air valve cervix and valve disk center and locates the heat that gathers, helps the exhaust valve Homogeneouslly-radiating.
The recess diameter that valve retainer is connected with valve stem diminish gradually (as the EF part among Fig. 1 and 2), the horizontal contour edge of neck arc profile edge and valve stem is tangent, and cavity arrives the distance on plane, horizontal projection place of the end face of valve retainer less than the point of contact at horizontal contour edge of valve stem and neck arc profile edge to the distance on the plane, horizontal projection place of the end face of valve retainer near an end of valve retainer.This structural design more helps conducting rapidly the heat that air valve cervix and valve disk center place gather, and helps the exhaust valve Homogeneouslly-radiating.
The end face of described valve retainer can be the plane, also can be the curved surface (being example as illustrated in Figures 5 and 6) of a depression.When the end face of valve retainer is the curved surface of depression when (as shown in Figure 5), its horizontal projection is the circle in the horizontal plane.The curved surface of depression can increase heat diffusion area, but its intensity decreases; End face is that exhaust valve (as shown in Figure 6) heat diffusion area on plane is smaller, but it has higher intensity.In the concrete using process, can select according to designing requirement.Because during the curved surface that the valve retainer end face is designed to cave in, its influence that intensity is reduced is greater than the influence that strengthens heat radiation, so the end face of preferred valve retainer is the plane.
When selecting for use end face to be the valve retainer on plane, the structure of a sunk area is arranged in the center of its end face preferably.This structure helps forming a gas whirlpool, more helps heat radiation, in addition, also helps alleviating exhaust valve weight.The point of contact at horizontal contour edge of valve stem and neck arc profile edge is 12.0～12.4mm to the distance of the end face of valve retainer, preferred 12.2mm.This structural design more helps conducting rapidly the heat that air valve cervix and valve disk center place gather.
The percentage that fills the volume duty cavity volume of sodium in the cavity of valve is 61～68%, preferred 63%.Inventor's test result shows that radiating effect is best when filling sodium volume 63%.
Described valve stem comprises hollow parts and solid section (being illustrated in figure 3 as example).The material of hollow parts and solid section can be the same or different, and is corresponding, and the contour machining procedure of exhaust valve is difference to some extent also.When the material of hollow parts and solid section is identical, at first on the part (with the integrated part of valve retainer) of engine valve stem, get out a cavity, this cavity extends to valve retainer along shaft axis from valve stem, another part at valve stem also gets out the identical cavity of internal diameter, next in aforementioned first cavity, fill sodium, with two sections valve stem butt welding (be illustrated in figure 4 as example, the A place is the welding part), two cavitys are communicated as one then.The material of hollow parts and solid section is not simultaneously, same, earlier on the part (with the integrated part of valve retainer) of engine valve stem, get out a cavity, this cavity extends to valve retainer along shaft axis from valve stem, in this cavity, fill sodium, what then that an external diameter is identical with valve stem hollow parts solid metal rod (being the valve stem solid section) and valve stem hollow parts were coaxial (is illustrated in figure 3 as example to welded together, the B place is the welding part), thus the hollow parts of valve stem and solid section are coupled together.Because the main effect of hollow parts is heat conduction, solid section will cooperate with valve guide bushing, so the heat resistance of hollow parts is had relatively high expectations, the hardness of solid section is had relatively high expectations.So preferred hollow parts is selected different materials for use with solid section, and is corresponding, the also preferred back of contour machining procedure is a kind of.The preferred austenitic steel of valve stem solid section (for example X45CrSi93), the preferred Martensite Steel of hollow parts body (for example X50CrMnNiNbN219) can better satisfy actual demand.During welding, guarantee that hollow parts and solid section are coaxial.In sum, preferred construction is: valve stem comprises hollow parts and solid section, and the hollow parts and the valve retainer of described valve stem are one-body molded, and the hollow parts and the solid section of described valve stem weld together coaxially.
Because the temperature at 45 ° of conical surface places (shown in G in Fig. 1 and 3) that exhaust valve cooperates with exhaust valve seat insert is higher, can play high temperature resistant, erosion-resisting effect at too upright No. 6 (being Stellite F) alloys of 45 ° of conical surface place built-up welding one deck departments that exhaust valve cooperates with exhaust valve seat insert, so preferably 45 ° of conical surface place built-up welding that cooperate with exhaust valve seat insert at exhaust valve have too upright No. 6 alloys of one deck department.The thickness of No. 6 alloy-layers of Si Taili can be selected according to actual needs, is preferably 0.3～0.7mm, more preferably 0.5mm.
The all surfaces or the part surface of valve stem and valve guide bushing matching part (as MN section among Fig. 3) are provided with chromium coating.The effect of chromium coating is the wear-resistant and self-lubricating property that increases engine valve stem.Preferred 0.005～the 0.015mm of chromium coating thickness.
The utility model has following advantage and effect with respect to prior art:
Facts have proved that (1) hollow of the present utility model is filled the sodium exhaust valve and can be effectively the exhaust valve temperature be reduced by 40～120 ℃, simultaneously the exhaust valve safety coefficient is brought up to greater than 2, can reach 2.5, has satisfied the application of exhaust valve on supercharged engine preferably.In addition, the utility model has also alleviated valve weight, has further optimized the kinology and the dynamics of engine valve actuating mechanism, has also improved engine performance under the prerequisite that satisfies high row's temperature.
(2) cavity is 3.8mm～5.2mm near an end of valve retainer and the distance of valve retainer end face, the recess diameter that valve retainer is connected with valve stem diminishes gradually, the horizontal contour edge of neck arc profile edge and valve stem is tangent, described cavity arrives the distance of the end face of valve retainer less than horizontal contour edge of valve stem and neck arc profile edge tangent point to the distance of valve retainer end face near an end of valve retainer, such structural design had both been avoided the excessive radiating and cooling shortcoming that is unfavorable for of distance, had avoided the too small deficiency that makes the mechanical strength decline of exhaust valve of distance again.
(3) valve stem comprises hollow parts and solid section, the hollow parts and the valve retainer of valve stem are one-body molded, the hollow parts and the solid section of valve stem weld together coaxially, 45 ° of conical surface place built-up welding that cooperate with exhaust valve seat insert at exhaust valve have too upright No. 6 alloys of one deck department, at least the part surface of valve stem and valve guide bushing matching part is provided with chromium coating, and such structural design can improve the mechanical strength and the heat resistance of exhaust valve comprehensively.
Description of drawings
Fig. 1 is the utility model plan view;
Fig. 2 is a stereogram of the present utility model;
Fig. 3 is a main sectional view of the present utility model;
Fig. 4 is the main sectional view of a kind of exhaust valve rod of prior art, and wherein, welding is connected as a single entity two sections valve stems at the A place;
Fig. 5 is the principal section figure (cutting open along axis) of a kind of valve retainer structure of the present utility model, and wherein, the end face of valve retainer is the curved surface of a depression;
Fig. 6 is the principal section figure (cutting open along axis) of another kind of valve retainer structure of the present utility model, and wherein, the end face of valve retainer is a plane.
In Fig. 1～6,
1---valve retainer, 5---the valve retainer end face,
2---valve stem, 6---valve retainer end face depression,
3---cavity, 7---an end of the close valve retainer of cavity,
4---sodium metal, the neck that EF---valve retainer is connected with valve stem,
The position that MN---valve 2 cooperates with valve guide bushing,
Neck arc profile edge that R---valve retainer is connected with valve stem and the tangent point of contact of the horizontal contour edge of valve stem,
B---the weld of valve stem hollow parts and solid section,
45 ° of conical surfaces that G---exhaust valve matches with exhaust valve seat insert.
Embodiment
Below in conjunction with embodiment and accompanying drawing the utility model is described in further detail, but mode of execution of the present utility model is not limited thereto.
Embodiment
As depicted in figs. 1 and 2, a kind of engine exhaust port comprises valve retainer 1 and valve stem 2, and valve retainer 1 and valve stem 2 shaft axiss overlap.The diameter of the neck EF that valve retainer 1 is connected with valve stem 2 diminishes gradually, and neck EF arc profile edge and valve stem 2 horizontal contour edges are tangential on R.
As shown in Figures 2 and 3, the end face 5 of valve retainer 1 is a plane, and there is a depression 6 center of end face 5.
As shown in Figure 3, a cavity 31 extends to valve stem 2 along shaft axis from valve retainer, is filled with sodium metal 4 in the cavity 3,61% or 63% or 65% or 68% of volume duty chamber 3 volumes of sodium metal 4.One end 7 of cavity 3 close valve retainers 1 is 4mm～5mm to the distance of the end face 5 of valve retainer 1.Valve stem 2 comprises hollow parts 21 and solid section 22, and hollow parts 21 and solid section 22 are in coaxial the welding together in B place.Valve stem solid section 22 is austenitic steel X45CrSi93, and hollow parts 21 is Martensite Steel X50CrMnNiNbN219.
As shown in Figure 3, the tangent point of contact R of the arc profile edge of the neck EF that valve retainer 1 is connected with valve stem 2 and valve stem 2 horizontal contour edges is 12.0～12.4mm to the distance of the end face 5 of valve retainer 1, specifically is 12.2mm in the present embodiment.The position that valve stem 2 cooperates with valve guide bushing is provided with chromium coating (chromium coating does not draw in the drawings), the thickness of chromium coating is 0.005～0.015mm, in the present embodiment, all surfaces of valve stem and valve guide bushing matching part (as MN section among Fig. 3) all is provided with chromium coating.Matching part is as shown in Fig. 3 frame of broken lines, and M, N are respectively the starting point and the terminal point of matching part, also is the starting point and the terminal point of chromium coating.
As shown in figs. 1 and 3,45 ° of G of conical surface place built-up welding that exhaust valve matches with exhaust valve seat insert has too upright No. 6 alloys of one deck department, and the thickness of alloy-layer is 0.3～0.7mm, specifically is 0.5mm in the present embodiment.
Claims (15)
1. engine exhaust port, comprise valve retainer and valve stem, valve retainer and valve stem shaft axis overlap, one cavity extends to valve stem along shaft axis from valve retainer, fill sodium in the cavity, it is characterized in that: the distance between the plane, horizontal projection place of an end of the close valve retainer of described cavity and the end face of valve retainer is 3.8mm～5.2mm.
2. engine exhaust port according to claim 1 is characterized in that: the distance on the plane, horizontal projection place of an end of the close valve retainer of described cavity and the end face of valve retainer is 4.0mm～5.0mm.
3. engine exhaust port according to claim 1, it is characterized in that: the recess diameter that valve retainer is connected with valve stem diminishes gradually, the horizontal contour edge of neck arc profile edge and valve stem is tangent, and described cavity arrives the distance on plane, horizontal projection place of the end face of valve retainer less than the point of contact at horizontal contour edge of valve stem and neck arc profile edge to the distance on the plane, horizontal projection place of the end face of valve retainer near an end of valve retainer.
4. engine exhaust port according to claim 3 is characterized in that: the end face of described valve retainer is the plane.
5. engine exhaust port according to claim 4 is characterized in that: there is a sunk area center of the end face of described valve retainer.
6. engine exhaust port according to claim 5 is characterized in that: the point of contact at horizontal contour edge of valve stem and valve retainer neck arc profile edge is 12.0～12.4mm to the distance of the end face of valve retainer.
7. engine exhaust port according to claim 6 is characterized in that: the point of contact at horizontal contour edge of valve stem and neck arc profile edge is 12.2mm to the distance of the end face of valve retainer.
8. engine exhaust port according to claim 1 is characterized in that: the percentage that fills the volume duty cavity volume of sodium is 61-68%.
9. engine exhaust port according to claim 8 is characterized in that: the percentage that fills the volume duty cavity volume of sodium is 63%.
10. engine exhaust port according to claim 1, it is characterized in that: described valve stem comprises hollow parts and solid section, the hollow parts and the valve retainer of described valve stem are one-body molded, and the hollow parts and the solid section of described valve stem weld together coaxially.
11. engine exhaust port according to claim 10 is characterized in that: 45 ° of conical surface place built-up welding that cooperate with exhaust valve seat insert at exhaust valve have too upright No. 6 alloys of one deck department.
12. engine exhaust port according to claim 11 is characterized in that: the thickness of too upright No. 6 alloy-layers of described department is 0.3～0.7mm.
13. engine exhaust port according to claim 12 is characterized in that: the thickness of described StelliteF alloy-layer is 0.5mm.
14. engine exhaust port according to claim 1 is characterized in that: all surfaces or the part surface of described valve stem and valve guide bushing matching part are provided with chromium coating.
15. engine exhaust port according to claim 1 is characterized in that: described chromium coating thickness is 0.005～0.015mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206901884U CN201924985U (en) | 2010-12-30 | 2010-12-30 | Engine exhaust valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206901884U CN201924985U (en) | 2010-12-30 | 2010-12-30 | Engine exhaust valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201924985U true CN201924985U (en) | 2011-08-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206901884U Expired - Lifetime CN201924985U (en) | 2010-12-30 | 2010-12-30 | Engine exhaust valve |
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| Country | Link |
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| CN (1) | CN201924985U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102269025A (en) * | 2011-06-29 | 2011-12-07 | 江苏欧尔特气门有限公司 | Novel hollow sodium filled valve |
| CN104481624A (en) * | 2014-11-26 | 2015-04-01 | 镇江维纳特气门有限公司 | Anti-knock pressure-resistant valve set |
| CN105298581A (en) * | 2015-10-30 | 2016-02-03 | 重庆奇甫机械有限责任公司 | Spiral flow-guide efficient heat exchange type sodium charging air valve |
| CN107313079A (en) * | 2017-07-31 | 2017-11-03 | 安徽沃德气门制造有限公司 | A kind of automobile air valve rapid chrome plating technique |
| CN107605562A (en) * | 2017-09-13 | 2018-01-19 | 张家港保税区通勤精密机械有限公司 | A kind of high intensity exhaust valve |
| CN108894842A (en) * | 2018-07-27 | 2018-11-27 | 安庆市鼎立汽车配件有限公司 | High-intensitive exhaust valve |
-
2010
- 2010-12-30 CN CN2010206901884U patent/CN201924985U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102269025A (en) * | 2011-06-29 | 2011-12-07 | 江苏欧尔特气门有限公司 | Novel hollow sodium filled valve |
| CN104481624A (en) * | 2014-11-26 | 2015-04-01 | 镇江维纳特气门有限公司 | Anti-knock pressure-resistant valve set |
| CN105298581A (en) * | 2015-10-30 | 2016-02-03 | 重庆奇甫机械有限责任公司 | Spiral flow-guide efficient heat exchange type sodium charging air valve |
| CN107313079A (en) * | 2017-07-31 | 2017-11-03 | 安徽沃德气门制造有限公司 | A kind of automobile air valve rapid chrome plating technique |
| CN107605562A (en) * | 2017-09-13 | 2018-01-19 | 张家港保税区通勤精密机械有限公司 | A kind of high intensity exhaust valve |
| CN108894842A (en) * | 2018-07-27 | 2018-11-27 | 安庆市鼎立汽车配件有限公司 | High-intensitive exhaust valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Wu Jian Inventor after: Zhang Zhuyun Inventor before: Zhang Zhuyun |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: ZHANG ZHUYUN TO: WU JIAN ZHANG ZHUYUN |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110810 |