CN210599134U - Hollow sodium-filled valve structure - Google Patents
Hollow sodium-filled valve structure Download PDFInfo
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- CN210599134U CN210599134U CN201920980644.XU CN201920980644U CN210599134U CN 210599134 U CN210599134 U CN 210599134U CN 201920980644 U CN201920980644 U CN 201920980644U CN 210599134 U CN210599134 U CN 210599134U
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- valve
- sodium
- cavity
- hollow
- stem
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Abstract
The utility model relates to a cavity fills sodium valve structure, including valve plate portion and valve stem, the specific position sets up one section cavity post in the valve stem, puts into the sodium strip in the cavity post simultaneously. The utility model discloses set up cavity post in valve stem department, reducible valve plate portion heat transfer to valve stem body and reduce the heat that transfers the valve guide, the vibration of the sodium after utilizing the liquefaction transmits the heat to cavity section stem body in a balanced way, reduces cavity section temperature gradient to reduce valve guide hot junction wearing and tearing.
Description
Technical Field
The utility model relates to an engine adopts the cavity to fill the sodium valve, reduces valve and valve guide contact segment pole portion temperature gradient, thereby reduces the temperature of valve guide heat port department and reduces because of the unusual wearing and tearing that engine oil arouses at high temperature carbon deposit.
Background
The technology of the hollow sodium-filled valve has been used for a long time, and at present, all main valve suppliers in China have supply capacity. However, the existing hollow sodium-filled valve mainly has the following three applications:
1. for reducing the valve disc bottom temperature. The heat of the disc part is transferred to the whole valve stem through the oscillation of the liquefied sodium, so that the bottom temperature of the valve disc is reduced, and the valve disc part material meets the requirements of service performance and service life;
2. for reducing the valve disc bottom and valve disc top temperatures. The contact part of the top of the valve disc and the valve seat ring and the lower part of the valve rod are washed by high-temperature gas, the temperature is often higher than that of the bottom of the valve disc, and the hollow sodium-filled valve can also obviously improve the temperature of the top of the valve disc and the lower part of the valve rod and reduce the abrasion of the conical surface of the valve disc and the valve seat ring;
3. the design method is used for light weight design. Compared with the traditional solid valve, the hollow valve can generally reduce the weight by 6-10%, and the valve spring rigidity can be reduced after the weight of the valve is reduced, so that the driving power of a camshaft is reduced, the efficiency of an engine is improved, and the oil consumption is reduced.
When the temperature of a disc part of the existing hollow sodium-filled valve is reduced, a large amount of heat is transferred to a valve stem from the disc part through the oscillation of liquid sodium, the temperature of the matching part of the valve stem and a valve guide pipe is greatly increased, and the valve guide pipe is abnormally abraded due to the engine oil carbon deposition caused by the temperature increase of the valve stem.
Disclosure of Invention
The utility model aims to overcome the above-mentioned not enough, provide a cavity fills sodium valve structure, including valve plate portion and valve stem, set up one section cavity post in the valve stem, put into the sodium strip in the cavity post simultaneously.
As the utility model discloses a further improvement, well cavity post part is in valve stem center department, leaves the certain distance apart from the valve plate portion, and well cavity post part position when needing to ensure that the valve closes within well cavity part stretches out valve pipe hot end face 15 mm.
As a further improvement, the filling amount of the sodium bars in the hollow column needs to be adjusted according to different corresponding operating parameters of the engine.
The utility model has the advantages that, the hollow column of department at the valve stem can prevent the heat transfer of valve plate portion to the valve stem body, and further, reduces the heat that transmits the valve guide, utilizes the vibration of the sodium after the liquefaction to transmit the heat to the hollow section stem body in a balanced way, reduces the hollow section temperature gradient in the valve stem body to reduce valve guide hot junction wearing and tearing.
Drawings
Fig. 1 is a sectional view of the installation of the present invention.
Fig. 2 is a comparison diagram of the present invention and a conventional valve.
Description of reference numerals: 1-valve guide pipe, 2-valve, 3-hollow column, 4-hot end face of valve guide pipe, 5-valve rod, 6-valve disk part, 7-conventional valve hollow column, 8-the utility model discloses valve hollow column.
Detailed Description
The present invention will be further explained with reference to the following examples.
As shown in fig. 1 and fig. 2, the main components of the present invention are a hollow sodium-filled valve, from which the difference between the hollow column 7 in the conventional valve and the hollow column 8 in the present invention can be seen.
In fig. 2, a conventional hollow valve is generally used to lower the temperature of the valve disc portion 6, and therefore the hollow cylinder portion 7 is long and is passed through from the valve disc portion 6 to the upper portion of the stem. The heat of the valve plate part 6 is transferred to the upper part of the stem through the liquefied sodium inside, and the temperature of the valve plate part 6 is reduced, so that the conical surface abrasion of the valve plate part 6 is reduced.
In this case, the problem of wear of the conical surface of the disk portion is effectively solved by optimizing the material matching, heat treatment and surface treatment of the valve seat ring and the valve disk portion 6. If a conventional hollow valve is used, the heat of the valve disk part 6 is transferred to the valve stem 5 more, which increases the temperature of the valve stem 5 and further increases the wear of the valve stem and the tube at the hot end. Therefore, the design that the hollow sodium filling is additionally arranged at the specific position in the middle of the valve rod 5 is adopted, the diameter phi of the hollow column 3 is 3mm, the length is about 50mm, and when the position of the hollow column 3 is designed, the length that the hollow part extends out of the hot end face 4 of the valve guide pipe is about 15mm when the valve is closed. The heat of the valve disk part 6 is prevented from being rapidly uploaded, and the heat is transferred by utilizing the sodium after the valve 2 is oscillated and liquefied in the up-and-down reciprocating motion during working, so that the temperature gradient of the part of the valve rod 5 in the valve guide pipe 1 is greatly reduced, and the problem of abnormal abrasion at the hole opening of the hot end surface 4 of the valve guide pipe is effectively solved.
It should be noted that: the above embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (2)
1. The utility model provides a cavity fills sodium valve structure, includes valve plate portion (6) and valve rod (5), characterized by: set up one section cavity post (3) in valve stem (5), put into the sodium strip in cavity post (3) simultaneously, cavity post (3) part is in valve stem (5) center department, leaves certain distance apart from valve plate portion (6), and cavity post (3) part position when setting up needs to ensure that the valve closes within the well hollow portion stretches out valve pipe (1) hot junction face 15 mm.
2. A hollow sodium-filled valve structure as claimed in claim 1, characterized in that: the filling amount of the sodium bars in the hollow column (3) needs to be correspondingly adjusted according to different engine operating parameters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920980644.XU CN210599134U (en) | 2019-06-27 | 2019-06-27 | Hollow sodium-filled valve structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920980644.XU CN210599134U (en) | 2019-06-27 | 2019-06-27 | Hollow sodium-filled valve structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210599134U true CN210599134U (en) | 2020-05-22 |
Family
ID=70686890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920980644.XU Active CN210599134U (en) | 2019-06-27 | 2019-06-27 | Hollow sodium-filled valve structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210599134U (en) |
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2019
- 2019-06-27 CN CN201920980644.XU patent/CN210599134U/en active Active
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