JPH02218807A - Sodium cooled valve for internal combustion engine - Google Patents
Sodium cooled valve for internal combustion engineInfo
- Publication number
- JPH02218807A JPH02218807A JP3847389A JP3847389A JPH02218807A JP H02218807 A JPH02218807 A JP H02218807A JP 3847389 A JP3847389 A JP 3847389A JP 3847389 A JP3847389 A JP 3847389A JP H02218807 A JPH02218807 A JP H02218807A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- hollow part
- sodium
- metal sodium
- valve stem
- 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.)
- Granted
Links
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 title claims abstract description 34
- 229910052708 sodium Inorganic materials 0.000 title claims abstract description 34
- 239000011734 sodium Substances 0.000 title claims abstract description 34
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 7
- 238000001816 cooling Methods 0.000 claims description 9
- 229910052751 metal Inorganic materials 0.000 abstract description 12
- 239000002184 metal Substances 0.000 abstract description 12
- 239000000463 material Substances 0.000 abstract 2
- 238000007789 sealing Methods 0.000 abstract 1
- 239000000126 substance Substances 0.000 description 10
- KKCBUQHMOMHUOY-UHFFFAOYSA-N sodium oxide Chemical compound [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 2
- 229910001948 sodium oxide Inorganic materials 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- KEAYESYHFKHZAL-UHFFFAOYSA-N Sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910000104 sodium hydride Inorganic materials 0.000 description 1
- 239000012312 sodium hydride Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、内燃機関用吸排気弁として使用されるナトリ
ウム冷却弁に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a sodium cooling valve used as an intake and exhaust valve for an internal combustion engine.
従来のこの種のナトリウム冷却弁としては、中空部に、
熱伝達媒体として、中空部の容積より小容積の金属ナト
リウムを封入するとともに、中空部の残部を空気で満た
したものがある。Conventional sodium cooling valves of this type have a hollow part,
As a heat transfer medium, there is one in which metal sodium is sealed in a volume smaller than the volume of the hollow part, and the remainder of the hollow part is filled with air.
このように、中空部内に金属ナトリウムだけでなく、空
気をも封入しておくのは、弁作動時の振動を利用して、
金属ナトリウムを中空部内におい”Ｃ躍動飛散させ、弁
頭部から弁ステム部への熱伝達を迅速化するためである
。In this way, the reason why not only metal sodium but also air is sealed in the hollow part is to take advantage of the vibrations when the valve is operated.
This is to cause metallic sodium to be scattered in the hollow part, thereby speeding up heat transfer from the valve head to the valve stem.
上述のような従来のナトリウム冷却弁においては、中空
部における金属ナトリウム以外の部分が空気で満たされ
ているため、該空気中に含まれる酸素や水分が金属ナト
リウムと反応して、酸化ナトリウムや水酸化ナトリウム
、水素化ナトリウム等が生成されるおそれがある。In the conventional sodium cooling valve described above, the hollow part other than the metallic sodium is filled with air, so the oxygen and moisture contained in the air react with the metallic sodium, producing sodium oxide and water. Sodium oxide, sodium hydride, etc. may be generated.
これらの生成物質は、弁作動温度（約１００℃〜８００
℃）において、固体であったり、熱伝達の悪い物質であ
ったり、又は熱によって分解され、中空部の内圧を上昇
する性質を有するものであったりする。These products are produced at valve operating temperatures (approximately 100°C to 800°C).
℃), it may be solid, it may be a substance with poor heat transfer, or it may be decomposed by heat and have the property of increasing the internal pressure of the hollow part.
その結果、これらの生成物質により、封入された金属ナ
トリウムの弁作動時の流動が妨げられて、弁頭部から弁
ステム部への熱の速やがな移動が阻害されたり、中空部
の内圧が異常に上昇して、弁の肉薄部が破裂し、そこか
ら金属ナトリウムが噴出する等のおそれがある。As a result, these generated substances impede the flow of the enclosed metallic sodium during valve operation, inhibiting the rapid transfer of heat from the valve head to the valve stem, and increasing the internal pressure of the hollow part. There is a risk that the water will rise abnormally and the thin walled part of the valve will burst, causing metallic sodium to spew out from there.
本発明は、従来の技術が有する上記のような問題点を解
決した内燃機関用ナトリウム冷却弁を提供することを目
的としている。SUMMARY OF THE INVENTION An object of the present invention is to provide a sodium cooling valve for an internal combustion engine that solves the above-mentioned problems of the conventional technology.
［課題を解決するための手段〕
上記目的を達成するため、本発明は、中空部に、熱伝達
媒体として、該中空部の容積より小容積の金属ナトリウ
ムを封入するとともに、中空部の残部を真空状態とした
ことを特徴としている。[Means for Solving the Problems] In order to achieve the above object, the present invention includes filling a hollow portion with metal sodium as a heat transfer medium in a volume smaller than the volume of the hollow portion, and filling the remaining portion of the hollow portion with metal sodium. It is characterized by being in a vacuum state.
本発明においては、中空部内における金属ナトリウム以
外の部分は真空であるので、金属ナトリウムと他の物質
とが反応して、上記のような有害な物質が生成されるこ
とはない。In the present invention, since the hollow portion other than the metallic sodium is in a vacuum, the metallic sodium and other substances do not react to produce harmful substances such as those described above.
以下、本発明の一実施例を、添付図面に基づいて説明す
る。Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings.
（１）は、内燃機関用吸排気弁として用いるナトリウム
冷却弁で、弁頭部（２）と弁ステム部（３）とからなり
、弁頭部（２）から弁ステム部（３）の先端近傍までの
中心軸線上には、中空部（４）が形成されている。(1) is a sodium-cooled valve used as an intake and exhaust valve for internal combustion engines, and consists of a valve head (2) and a valve stem (3), from the valve head (2) to the tip of the valve stem (3). A hollow portion (4) is formed on the central axis up to the vicinity.
中空部（４）内には、その容積のほぼ３分の２程度の容
積を占める熱伝達媒体としての金属ナトリウム（５）が
封入され、中空部（４）の残部は真空（６）状態としで
ある。Metallic sodium (5) as a heat transfer medium is sealed in the hollow part (4) and occupies about two-thirds of its volume, and the remainder of the hollow part (4) is kept in a vacuum (6) state. It is.
（７）は、内燃機関の吸気口又は排気口の開口縁部に設
けられた弁座、（８）は、ナトリウム冷却弁（１）の弁
ステム部（３）の軸線方向の往復移動を案内する弁ガイ
ドである。(7) is a valve seat provided at the opening edge of the intake or exhaust port of the internal combustion engine, and (8) is for guiding the reciprocating movement of the valve stem (3) of the sodium cooling valve (1) in the axial direction. This is a valve guide.
上記構成の本発明の冷却弁によると、その作動時に、中
空部（４）内の金属ナトリウム（５）は、中空部（４）
内の残部が真空（６）であるので、他の物質と反応する
ことはなく、貨来のものにおけるような有害な物質が生
成されることはない。According to the cooling valve of the present invention having the above configuration, when the cooling valve is operated, the metal sodium (5) in the hollow part (4) is removed from the hollow part (4).
Since the rest of the interior is a vacuum (6), it will not react with other substances and no harmful substances will be generated as in the conventional one.
したがって、金属ナトリウム（５）は、有害物質により
流動が妨げられることなく、弁作動時の振動により、中
空部（４）内において自由に躍動飛散し、弁頭部（２）
の熱を迅速に弁ステム部（３）に伝達する。Therefore, the flow of metallic sodium (5) is not hindered by harmful substances, and due to the vibrations when the valve is operated, the metal sodium (5) freely pulsates and scatters within the hollow part (4), and the valve head (2)
heat is quickly transferred to the valve stem portion (3).
従って熱は、弁ステム部（３）から弁ガイド（８）を通
じて迅速に放散され、弁頭部（２）の温度は効果的に下
げられる。Heat is therefore rapidly dissipated from the valve stem (3) through the valve guide (8) and the temperature of the valve head (2) is effectively reduced.
本発明によると、中空部内に封入された金属ナトリウム
は、他物質と反応して、流動の妨げや熱伝達の妨げとな
る有害な物質を生成するおそれはなく、弁作動時の振動
により、中空部内において自由に躍動飛散し、弁頭部の
熱を弁ステム部に迅速に伝達することができる。According to the present invention, there is no risk that the metallic sodium sealed in the hollow part will react with other substances and produce harmful substances that impede flow or heat transfer. The heat of the valve head can be rapidly transferred to the valve stem by freely moving and scattering within the valve stem.
また、中空部内の圧力を異常に上昇させるような物質が
生成されることはないので、中空部内の異常昇圧による
弁自体の破損や金属ナトリウムの漏出等のおそれを防止
することができる。Furthermore, since no substance is generated that would abnormally increase the pressure within the hollow portion, it is possible to prevent damage to the valve itself or leakage of metallic sodium due to abnormal pressure increase within the hollow portion.
図面は、本発明の一実施例の縦断正面図である。
（１）ナトリウム冷却弁 （２）弁頭部（３）弁ステム
部 （４）中空部（５）金属ナトリウム （６
）真空The drawing is a longitudinal sectional front view of one embodiment of the present invention. (1) Sodium cooling valve (2) Valve head (3) Valve stem (4) Hollow part (5) Metallic sodium (6
)vacuum
Claims (1)
積の金属ナトリウムを封入するとともに、中空部の残部
を真空状態としたことを特徴とする内燃機関用ナトリウ
ム冷却弁。1. A sodium cooling valve for an internal combustion engine, characterized in that a hollow part is filled with metallic sodium as a heat transfer medium in a volume smaller than the volume of the hollow part, and the remainder of the hollow part is kept in a vacuum state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1038473A JP2887393B2 (en) | 1989-02-20 | 1989-02-20 | Sodium cooling valve for internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1038473A JP2887393B2 (en) | 1989-02-20 | 1989-02-20 | Sodium cooling valve for internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02218807A true JPH02218807A (en) | 1990-08-31 |
| JP2887393B2 JP2887393B2 (en) | 1999-04-26 |
Family
ID=12526218
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1038473A Expired - Fee Related JP2887393B2 (en) | 1989-02-20 | 1989-02-20 | Sodium cooling valve for internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2887393B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012168136A1 (en) * | 2011-06-08 | 2012-12-13 | Mahle International Gmbh | Method for producing a hollow metal valve with improved cooling |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS504888U (en) * | 1973-05-14 | 1975-01-18 | ||
| JPS60154885A (en) * | 1984-01-25 | 1985-08-14 | Kawasaki Heavy Ind Ltd | Production of vessel for sealing liquid |
| JPS60154887A (en) * | 1984-01-25 | 1985-08-14 | Kawasaki Heavy Ind Ltd | Production of hermetic vessel |
-
1989
- 1989-02-20 JP JP1038473A patent/JP2887393B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS504888U (en) * | 1973-05-14 | 1975-01-18 | ||
| JPS60154885A (en) * | 1984-01-25 | 1985-08-14 | Kawasaki Heavy Ind Ltd | Production of vessel for sealing liquid |
| JPS60154887A (en) * | 1984-01-25 | 1985-08-14 | Kawasaki Heavy Ind Ltd | Production of hermetic vessel |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012168136A1 (en) * | 2011-06-08 | 2012-12-13 | Mahle International Gmbh | Method for producing a hollow metal valve with improved cooling |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2887393B2 (en) | 1999-04-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |