JPH02218806A - Sodium cooled valve for internal combustion engine - Google Patents
Sodium cooled valve for internal combustion engineInfo
- Publication number
- JPH02218806A JPH02218806A JP3847289A JP3847289A JPH02218806A JP H02218806 A JPH02218806 A JP H02218806A JP 3847289 A JP3847289 A JP 3847289A JP 3847289 A JP3847289 A JP 3847289A JP H02218806 A JPH02218806 A JP H02218806A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- sodium
- gas
- metal sodium
- hollow part
- 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.)
- Pending
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 38
- 229910052708 sodium Inorganic materials 0.000 title claims abstract description 38
- 239000011734 sodium Substances 0.000 title claims abstract description 38
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 8
- 238000001816 cooling Methods 0.000 claims description 11
- 229910052751 metal Inorganic materials 0.000 abstract description 12
- 239000002184 metal Substances 0.000 abstract description 12
- 238000007789 sealing Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 13
- 239000000126 substance Substances 0.000 description 8
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 239000001307 helium Substances 0.000 description 2
- 229910052734 helium Inorganic materials 0.000 description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 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
- KEAYESYHFKHZAL-UHFFFAOYSA-N Sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- KYKAJFCTULSVSH-UHFFFAOYSA-N chloro(fluoro)methane Chemical compound F[C]Cl KYKAJFCTULSVSH-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Lift Valve (AREA)
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 metallic 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て躍動飛散させ、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 dynamically scatter metallic sodium within the hollow part and speed 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か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 causing abnormal internal pressure in the hollow part. There is a risk that the thin part of the valve will rupture and metallic sodium will 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.
上記目的を達成するため、本発明の内燃機関用ナトリウ
ム冷却弁は、中空部に、熱伝達媒体としての金属ナトリ
ウムと、弁作動温度範囲において金属ナトリウムに対し
て不活性な気体とを密封したことを特徴としている。In order to achieve the above object, the sodium cooling valve for an internal combustion engine of the present invention has a hollow portion sealed with metallic sodium as a heat transfer medium and a gas inert to metallic sodium within the valve operating temperature range. It is characterized by
中空部に封入する気体としては、窒素ガス、若しくはヘ
リウムガス、アルゴンガス等の狭義の不活性ガス、又は
フロンガス等とするのがよい。The gas to be filled in the hollow portion is preferably nitrogen gas, a narrowly defined inert gas such as helium gas, argon gas, or chlorofluorocarbon gas.
本発明においては、弁作動温度範囲内においては、中空
部内における金属ナトリウムと他部の気体とはほとんど
反応しないので、金属ナトリウムの流動や熱伝達に障害
となる物質が生成されることはない。In the present invention, within the valve operating temperature range, the metallic sodium in the hollow part hardly reacts with the gas in other parts, so that no substance is produced that would impede the flow of metallic sodium or heat transfer.
〔実 施 例〕
以下、本発明の一実施例を、添付図面に基づいて説明す
る。[Example] Hereinafter, an example 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）と
、残りの容積を占めるとともに、弁作動温度範囲におい
て金属ナトリウムと反応しにくい気体（６）とが密封さ
れている。Inside the hollow part (4), metal sodium (5) as a heat transfer medium occupies about two-thirds of its volume, and metal sodium (5) occupies the remaining volume and reacts with metal sodium in the valve operating temperature range. The gas (6) that is difficult to evaporate is sealed.
このような気体（６）としては、例えば窒素ガス。Such a gas (6) is, for example, nitrogen gas.
若しくはヘリウムガス、アルゴンガス等の狭義の不活性
ガス、又はフロンガス等とするのがよい。Alternatively, it is preferable to use an inert gas in a narrow sense such as helium gas or argon gas, or fluorocarbon gas.
（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）と気体（６）とは
、弁作動温度範囲内において反応することはなく、従来
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) and the gas (6) in the hollow part (4) do not react within the valve operating temperature range, and compared to the conventional cooling valve. No harmful substances are produced.
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 vibrations during valve operation, 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
弁内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 inner body 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
）気体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
)gas
Claims (1)
動温度範囲において金属ナトリウムに対して不活性な気
体とを密封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 portion is sealed with metallic sodium as a heat transfer medium and a gas inert to metallic sodium within the valve operating temperature range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3847289A JPH02218806A (en) | 1989-02-20 | 1989-02-20 | Sodium cooled valve for internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3847289A JPH02218806A (en) | 1989-02-20 | 1989-02-20 | Sodium cooled valve for internal combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02218806A true JPH02218806A (en) | 1990-08-31 |
Family
ID=12526188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3847289A Pending JPH02218806A (en) | 1989-02-20 | 1989-02-20 | Sodium cooled valve for internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02218806A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013145250A1 (en) * | 2012-03-30 | 2013-10-03 | 日鍛バルブ株式会社 | Method for manufacturing hollow poppet valve containing refrigerant, hollow poppet valve containing refrigerant, and valve-housing fixture |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS504888U (en) * | 1973-05-14 | 1975-01-18 | ||
| JPS529709A (en) * | 1975-07-15 | 1977-01-25 | Toyota Motor Corp | Hollow poppet valve body and its manufacturing method |
-
1989
- 1989-02-20 JP JP3847289A patent/JPH02218806A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS504888U (en) * | 1973-05-14 | 1975-01-18 | ||
| JPS529709A (en) * | 1975-07-15 | 1977-01-25 | Toyota Motor Corp | Hollow poppet valve body and its manufacturing method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013145250A1 (en) * | 2012-03-30 | 2013-10-03 | 日鍛バルブ株式会社 | Method for manufacturing hollow poppet valve containing refrigerant, hollow poppet valve containing refrigerant, and valve-housing fixture |
| JPWO2013145250A1 (en) * | 2012-03-30 | 2015-08-03 | 日鍛バルブ株式会社 | Manufacturing method of hollow poppet valve with refrigerant, hollow poppet valve with refrigerant, and valve housing jig |
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