DE493150C - Cooled piston, especially for internal combustion engines - Google Patents
Cooled piston, especially for internal combustion enginesInfo
- Publication number
- DE493150C DE493150C DEG76217D DEG0076217D DE493150C DE 493150 C DE493150 C DE 493150C DE G76217 D DEG76217 D DE G76217D DE G0076217 D DEG0076217 D DE G0076217D DE 493150 C DE493150 C DE 493150C
- Authority
- DE
- Germany
- Prior art keywords
- internal combustion
- heat
- combustion engines
- piston
- cooled piston
- 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.)
- Expired
Links
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
- F02F3/18—Pistons having cooling means the means being a liquid or solid coolant, e.g. sodium, in a closed chamber in piston
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Description
Gekühlter Kolben, insbesondere für Brennkraftmaschinen Gegenstand der Erfindung ist ein gekühlter Kolben, insbesondere für Br ennkraftrnaschinen, bei dem der clicht verschlossene Hohlraub des hohl ausgebildeten Kolbens mit einem leicht beweglichen wärmeübertragenden Stoff gefüllt ist. Als derartiger Stoff wurde bereits Wasser und, da dies bei hoher Kolbentemperatur infolge großen Dampfdruckes den Kolben sprengen könnte, die Verwendung von Metallen, insbesondere leicht schmelzbaren Metallegierungen. vorgeschlagen.Cooled piston, in particular object for internal combustion engines the invention is a cooled piston, in particular for internal combustion engines, in which the clicht closed hollow screw of the hollow piston with a easily movable heat transferring material is filled. As such a substance was already water and, since this is at high piston temperature due to high vapor pressure could blow up the piston, the use of metals, especially easily fusible ones Metal alloys. suggested.
Die Erwägung, daß Metalle und Metallegierungen eine kleine Wärmekapazität, insbesondere aber auch eine kleine Schmelzwärme besitzen, hat dazu geführt, dieselben durch Salze von geeigneter Schmelztemperatur zu ersetzen. So hat z. B. Woodsche Legierung, die bei 76 ° C schmilzt, eine Schmelzwärme von ;,8 WE und eine Wärmekapazität von o,o5, \atriumphosphat eine Schmelztemperatur von 36 ° C, eine Schmelzwärme von 67 WE und eine Wärmekapazität von o,4.5. Sollen höhere Kolbentemperaturen zugelassen werden, so stünde z. B. N atirumnitrat mit einer Schmelztemperatur von 3o6 ° C, einer Schmelzwärme von 65 WE und einer Wärmekapazität von o,.4 zur Verfügung gegen vergleichsweise Britanniametall mit einer Schmelztemperatur von 236 ° C, einer Schmelzwärme von 28 WE und einer Wärmekapazität von höchstens o,i.Considering that metals and metal alloys have a small heat capacity, but in particular also have a small heat of fusion has led to the same to be replaced by salts of a suitable melting temperature. So has z. B. Woodsche Alloy that melts at 76 ° C, a heat of fusion of;, 8 WE and a heat capacity of o, o5, \ atrium phosphate has a melting temperature of 36 ° C, a heat of fusion of 67 WE and a heat capacity of o, 4.5. Should higher piston temperatures permitted be, then z. B. N atirumnitrate with a melting temperature of 3o6 ° C, a heat of fusion of 65 WE and a heat capacity of o, .4 available against comparatively Britanniametall with a melting temperature of 236 ° C, a heat of fusion of 28 WE and a heat capacity of at most o, i.
Wie aus den guten Erfolgen mit Salzfüllungen zu schließen ist, erfolgt die Wärmeübertragung durch. abwechselndes Schmelzen und Rekristallisieren der hin und fier geschleuderten Masse, so daß tatsächlich in erster Linie die Größe der Schmelzwärme für die Wärmeübertragung maßgebend ist. Da die Schmelzwärme und auch die spezifische Wärme der Salze aber, wie die Beispiele zeigen, mehrmals größer ist als jene der Metalle, so kann mit demselben Füllgewicht mehr Wärme übertragen werden, und, es kann das Füllge-,vicht gegen jenes der Metalle wesentlich verringert werden.As can be inferred from the good successes with salt fillings, it is done the heat transfer through. alternating melting and recrystallization of the hin and fier hurled mass, so that actually primarily the size of the Heat of fusion is decisive for the heat transfer. Because the heat of fusion and also however, as the examples show, the specific heat of the salts is several times greater than that of metals, more heat can be transferred with the same filling weight and, the filling weight compared to that of the metals can be considerably reduced will.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEG76217D DE493150C (en) | Cooled piston, especially for internal combustion engines |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEG76217D DE493150C (en) | Cooled piston, especially for internal combustion engines |
Publications (1)
Publication Number | Publication Date |
---|---|
DE493150C true DE493150C (en) | 1930-03-04 |
Family
ID=7136168
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEG76217D Expired DE493150C (en) | Cooled piston, especially for internal combustion engines |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE493150C (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE931078C (en) * | 1950-05-15 | 1955-08-01 | Machines Thermiques S A R L So | Pistons for internal combustion engines |
DE1008524B (en) * | 1953-07-02 | 1957-05-16 | Jan Van Tilburg | Mixture-compressing piston internal combustion engine |
-
0
- DE DEG76217D patent/DE493150C/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE931078C (en) * | 1950-05-15 | 1955-08-01 | Machines Thermiques S A R L So | Pistons for internal combustion engines |
DE1008524B (en) * | 1953-07-02 | 1957-05-16 | Jan Van Tilburg | Mixture-compressing piston internal combustion engine |
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