JPH02169849A - Piston with cooling passage - Google Patents
Piston with cooling passageInfo
- Publication number
- JPH02169849A JPH02169849A JP32510488A JP32510488A JPH02169849A JP H02169849 A JPH02169849 A JP H02169849A JP 32510488 A JP32510488 A JP 32510488A JP 32510488 A JP32510488 A JP 32510488A JP H02169849 A JPH02169849 A JP H02169849A
- Authority
- JP
- Japan
- Prior art keywords
- piston
- passage
- tube member
- main body
- casting
- 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
- 238000001816 cooling Methods 0.000 title description 4
- 239000002826 coolant Substances 0.000 claims abstract description 12
- 238000005266 casting Methods 0.000 claims abstract description 9
- 238000004891 communication Methods 0.000 claims description 9
- 229910000838 Al alloy Inorganic materials 0.000 abstract description 5
- 238000002485 combustion reaction Methods 0.000 abstract description 3
- 238000005553 drilling Methods 0.000 abstract description 3
- 229910052751 metal Inorganic materials 0.000 abstract description 3
- 239000002184 metal Substances 0.000 abstract description 3
- 230000003014 reinforcing effect Effects 0.000 abstract description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052802 copper Inorganic materials 0.000 abstract description 2
- 239000010949 copper Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract description 2
- 238000003825 pressing Methods 0.000 abstract description 2
- 239000011148 porous material Substances 0.000 description 3
- 239000007769 metal material Substances 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F3/00—Pistons
- F02F3/16—Pistons having cooling means
- F02F3/20—Pistons having cooling means the means being a fluid flowing through or along piston
- F02F3/22—Pistons having cooling means the means being a fluid flowing through or along piston the fluid being liquid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2201/00—Metals
- F05C2201/02—Light metals
- F05C2201/021—Aluminium
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明はピストン頂部に環状の冷却通路を備えたピスト
ンに関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a piston having an annular cooling passage in the top of the piston.
従来の技術
ピストンの頂部は高温高圧となる燃焼室に隣接している
ために、冷却通路を、その周壁を強化するように形成す
ることが望まれ、この要望に応えるべく特開昭６３−１
２４８５１号公報になる発明のピストンか案出されてい
る。Conventional Technology Since the top of the piston is adjacent to the combustion chamber where the temperature and pressure are high, it is desired to form a cooling passage so as to strengthen its peripheral wall.
A piston according to the invention disclosed in Japanese Patent No. 24851 has been devised.
発明か解決しようとする問題点
しかしながら上記公報になるピストンは、可溶性中子を
１ａ椎体で包み込んだ成形体を金型内にセットシだ状聾
で注湯した後に加圧して形成し、その後ピストン内部か
ら可溶性中子に至る２ケ所の通孔を穿設し、一方から高
圧の液体を注入して可溶性中子を溶解して他方から排出
し、冷却通路となる空洞部を形成するようになっている
。このため鋳造工程の後に可溶性中子を排出する作業を
要し、工程数が増加して面倒となるという問題点かあっ
た。Problems to be Solved by the Invention However, the piston disclosed in the above-mentioned publication is formed by pouring a molded body in which a soluble core is wrapped in 1a vertebrae into a mold with a set sill shape and applying pressure, and then forming the piston. Two holes are drilled from the inside to the soluble core, and high-pressure liquid is injected from one to melt the soluble core and discharged from the other, forming a cavity that serves as a cooling passage. ing. Therefore, it is necessary to discharge the soluble core after the casting process, which increases the number of steps and becomes troublesome.
問題点を解決するための手段
本発明は上記問題点を解決するためになされたもので、
頂部に環状に形成された管部材を鋳包んで備えると共に
、ピストン本体の内部から前記管部材に貫通する複数の
連通路を設け、ピストン内部から一部の連通路を通り、
管部材の内部を循環して他の連通路からピストン内部に
還流する冷却剤の通路を備えたことを特徴としている。Means for Solving the Problems The present invention has been made to solve the above problems.
A pipe member formed in an annular shape is provided at the top by casting, and a plurality of communication passages are provided that penetrate from the inside of the piston body to the pipe member, and some of the communication passages are passed from the inside of the piston,
It is characterized by having a coolant passage that circulates inside the tube member and returns to the inside of the piston from another communication passage.
作用
本発明になるピストンは冷却剤の通路の一部を頂部に鋳
包み形成された環状の管部材で形成することにより、鋳
包み鋳造によって自動的に冷却剤の通路が形成される。Operation In the piston of the present invention, a part of the coolant passage is formed by an annular pipe member cast-in at the top, so that the coolant passage is automatically formed by cast-in casting.
実施例 以下、本発明の実施例を図面に基づいて詳述する。Example Hereinafter, embodiments of the present invention will be described in detail based on the drawings.
第１図において！はアルミニウム合金製のピストン本体
で、該ピストン本体の頂部１ａには環状に形成された銅
製の管部材２を包み込んだ加圧成形体３が鋳包まれてい
る。この加圧成形体３は管部材２を金属粉或は金属繊維
等で包み込み、全体を加圧成形したものであり、多孔質
材で管部材２を包み込む構造になっている。この加圧成
形体３を第２図の金型６の底部に載置してキャビティ６
ａ内にアルミニウム合金の溶、易を注渇し、次いでプラ
ンジャ７で加圧して前記加圧成形体３の多孔質層にアル
ミニウム合金の溶湯が浸透して凝固し、ピストン本体ｌ
が形成される。この後、ピストン本体１の内部から連通
路８を２ケ所、管部材２へ穿設して、冷却剤の通路９か
形成され、冷却剤の通路９を備えたピストンが構成され
る。In Figure 1! 1 is a piston body made of aluminum alloy, and a press-formed body 3 enclosing an annular copper pipe member 2 is cast in the top portion 1a of the piston body. This pressure-molded body 3 is obtained by wrapping the tube member 2 with metal powder or metal fibers, etc., and press-molding the entire body, and has a structure in which the tube member 2 is wrapped in a porous material. This press-molded body 3 is placed on the bottom of the mold 6 shown in FIG.
The molten aluminum alloy is poured into the inside of the piston body l, and then pressurized by the plunger 7, the molten aluminum alloy permeates into the porous layer of the press-formed body 3 and solidifies.
is formed. Thereafter, communication passages 8 are bored into the pipe member 2 at two locations from inside the piston body 1 to form coolant passages 9, and a piston having the coolant passages 9 is constructed.
このようにして構成された本実施例のピストンは、ピス
トン本体１を鋳造にて形成した後に、連通路８を穿設す
るだけで、冷却剤の通路９を形成することができる。ま
た、管部材２はピストン本体ｌの頂部にあって補強部材
としての役割も果たす。この補強の目的のために管部材
２は、他の金属材料やセラミックス等を選択することが
できる。In the piston of this embodiment configured in this manner, the coolant passage 9 can be formed by simply drilling the communication passage 8 after the piston body 1 is formed by casting. Further, the tube member 2 is located at the top of the piston body l and also serves as a reinforcing member. For this reinforcing purpose, the tube member 2 can be made of other metal materials, ceramics, or the like.
但し、防錆上の理由により、金属材料にあってはステン
レス鋼等の不錆材の選択が好ましい。However, for reasons of rust prevention, it is preferable to select a rust-free metal material such as stainless steel.
第３図は池の実施例であり、本実施例にあっては、環状
に形成された管部材２の側壁に通孔２ａを２ケ所形成し
、これらの通孔２ａに臨ませて池の管部材１０を溶岩す
ることにより、冷却剤の通路９を構成４″ろ通路体１１
を形成し、該通路体ｌｌを、前実施例同様に、多孔質材
で包み込んで鋳造成形して、冷却剤の通路９を備えたピ
ストンが形成される。従って本実施例にあっては、鋳造
後にドリル穿孔の工程が不必要となり、更なる工作の簡
素化が企れる。FIG. 3 shows an embodiment of a pond. In this embodiment, two through holes 2a are formed in the side wall of an annular pipe member 2, and the pond is opened facing these through holes 2a. A coolant passage 9 is constructed by lava-rocking the tube member 10 4″ filter passage body 11
As in the previous embodiment, the passage body 11 is covered with a porous material and cast, thereby forming a piston having a coolant passage 9. Therefore, in this embodiment, the step of drilling after casting is unnecessary, and further simplification of the work is attempted.
なお、上記各実施例にあっては、管部材を多孔質材で包
み込んで鋳造しているが、アルミニウム合金で鋳包み鋳
造した際に、熱や圧力で変形することなく、また、境界
面か剥離しない材料であれば、直接金型上に載置して鋳
包んでもよい。In each of the above examples, the tube member is wrapped in a porous material and cast, but when cast in an aluminum alloy, it does not deform due to heat or pressure, and the boundary surface does not change. As long as the material does not peel off, it may be directly placed on the mold and cast.
発明の効果
以上述べたように本発明にあっては、ピストン本体の項
部に管部材を鋳包むことによって、冷却剤の通路を形成
したので、通路形成のための工程が簡素化されると共に
、管部材によって、高圧のシリンダ内の燃焼室に隣接す
る頂部を補強することかできるという効果がある。Effects of the Invention As described above, in the present invention, the coolant passage is formed by casting a pipe member into the neck of the piston body, which simplifies the process for forming the passage. The tubular member has the advantage that the top part adjacent to the combustion chamber in the high-pressure cylinder can be reinforced.
第１図は本発明によるピストンの一実施例を示す断面図
、第２図は本発明のピストンの製造工程を説明する金型
の断面図、第３図は他の実施例の断面図である。
ｌ・・・ピストン本体、■ａ・・・頂部、２・・・管部
材、８・連通路、９・・通路。
ピストン本体
頂部
管部材
連通路
通路Fig. 1 is a sectional view showing one embodiment of a piston according to the present invention, Fig. 2 is a sectional view of a mold explaining the manufacturing process of the piston of the invention, and Fig. 3 is a sectional view of another embodiment. . l: Piston body, ■a: Top, 2: Pipe member, 8: Communication passage, 9: Passage. Piston body top tube member communication passage passage
Claims (2)
と共に、ピストン本体の内部から前記管部材に貫通する
複数の連通路を設け、ピストン内部から一部の連通路を
通り、管部材の内部を循環して池の連通路からピストン
内部に還流する冷却剤の通路を備えてなるピストン。(1) A tubular member formed in an annular shape is provided at the top by casting, and a plurality of communicating passages are provided that penetrate from the inside of the piston body to the tubular member. A piston that is equipped with a passage for coolant to circulate inside the piston and return to the inside of the piston from a communication passage in the pond.
形成し、該通孔に臨むように他の管部材を固設してなる
特許請求の範囲第一項に記載されたピストン。(2) The communication path is formed by forming a plurality of through holes in the side surface of the tube member, and fixing another tube member so as to face the through holes. piston.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32510488A JPH02169849A (en) | 1988-12-22 | 1988-12-22 | Piston with cooling passage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32510488A JPH02169849A (en) | 1988-12-22 | 1988-12-22 | Piston with cooling passage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02169849A true JPH02169849A (en) | 1990-06-29 |
Family
ID=18173172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32510488A Pending JPH02169849A (en) | 1988-12-22 | 1988-12-22 | Piston with cooling passage |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02169849A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008031862A1 (en) * | 2008-07-05 | 2010-01-07 | Mahle International Gmbh | Insert for piston of combustion engine, particularly diesel engines, has circulating fire land, circulating ring portion and circulating cooling duct, where piston head is provided with piston base having combustion recess |
-
1988
- 1988-12-22 JP JP32510488A patent/JPH02169849A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008031862A1 (en) * | 2008-07-05 | 2010-01-07 | Mahle International Gmbh | Insert for piston of combustion engine, particularly diesel engines, has circulating fire land, circulating ring portion and circulating cooling duct, where piston head is provided with piston base having combustion recess |
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