FR2475672A1 - Piston with non-split sealing rings - uses bolted head to secure demountable annular packing pieces locating sealing rings - Google Patents
Piston with non-split sealing rings - uses bolted head to secure demountable annular packing pieces locating sealing rings Download PDFInfo
- Publication number
- FR2475672A1 FR2475672A1 FR7919634A FR7919634A FR2475672A1 FR 2475672 A1 FR2475672 A1 FR 2475672A1 FR 7919634 A FR7919634 A FR 7919634A FR 7919634 A FR7919634 A FR 7919634A FR 2475672 A1 FR2475672 A1 FR 2475672A1
- Authority
- FR
- France
- Prior art keywords
- sealing rings
- piston
- annular packing
- packing pieces
- split
- 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.)
- Withdrawn
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J1/00—Pistons; Trunk pistons; Plungers
- F16J1/005—Pistons; Trunk pistons; Plungers obtained by assembling several pieces
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Braking Arrangements (AREA)
Abstract
Description
Si le piston proprement dit se reconnait incapable de résoudre le problême de l'étanchéité, à cause de l'inégalité de pression sur le pourtour de sa partie cylindrique, a laquelle s'ajoute le problème de sa dilatation, différente de celle du cylindre ; le segment fendu est loin de le résoudre de façon satisfaisante pour les raisons suivantes
La fente de dilatation prevue de telle sorte qu'elle soit complètement éliminee suivant une temperature ; contribue a freiner le piston, sitôt que la pression contourne ce segment et agit en expansion sur sa tranche Interne.If the piston itself recognizes itself incapable of solving the problem of sealing, because of the unequal pressure on the periphery of its cylindrical part, to which is added the problem of its expansion, different from that of the cylinder; the split segment is far from satisfactorily resolving it for the following reasons
The expansion slot provided so that it is completely eliminated at a temperature; helps to brake the piston, as soon as the pressure bypasses this segment and acts in expansion on its internal edge.
Or, un semgent, compte tenu de son entière Indépendance vis-a-vis du piston et du cylindre ; jouit d'une situation exceptionnelle telle que le lubrifiant, suivi de la pression, s'lnterpose uniformément entre lui et ses voisins ; sans qu'un effort latéral excessif ; seul facteur d'usure ne s'affirme ; puisqu'étant unIformément isole. Autrement dit, sl le rôle d'intermédiaire du lubri- fiant est respecte de façon a coTnclder avec la dilatation maximale d'un segment non-fendu ; cela se ferait au profit du cylindre qui de ce faft ne serait jamals détériore ; voire meme Jamais menace par ce segment. Now, a semgent, given its complete independence from the piston and the cylinder; enjoys an exceptional situation such that the lubricant, followed by the pressure, is interposed uniformly between it and its neighbors; without excessive lateral effort; only wear factor asserts itself; since being formally isolated. In other words, sl the role of intermediary of the lubricant is respected so as to coincide with the maximum expansion of an unsplit segment; this would be done for the benefit of the cylinder which would therefore never be damaged; or even never threatened by this segment.
Donc, s'il n'est pas souhaitable qu'un segment soit fendu ; il n'est pas nécessaire qu'il le soit. Ce piston, objet de I'invention sous une fonte definitive classique se compose d'une partie principale (a), Incluant la jupe et les bossages de l'exe. Sur cette partie se visse une téte en acier (b), dotee d'une partie envidée cylindrique fonction du nombre et de la taille des segments (e) qui garnissent le piston ; et dont les entretoises (c et d) procurent le Jeu indispensable, sitot cette tête bloquee et freinée par (f). So, if it is not desirable that a segment be split; it doesn't have to be. This piston, object of the invention under a classic final cast consists of a main part (a), including the skirt and bosses of the exe. On this part is screwed a steel head (b), endowed with a cylindrical envied part depending on the number and the size of the segments (e) which line the piston; and whose spacers (c and d) provide the essential clearance, as soon as this head is blocked and braked by (f).
Un tel piston, pour un poids égal peut être bubstitue a n'importe quel autre ; avec l'avantage de pouvoir redonner aux segments leur jeu conventionnel en remplaçant périodiquement les entretoises. Such a piston, for an equal weight can be bubbled to any other; with the advantage of being able to restore the conventional play to the segments by periodically replacing the spacers.
D'autre part, le seul avantage du segment fendu qui repose qur la possi bilîté de l'enserrer dans le piston monolithique, lui adjuge une élasticité ini- tiale, meme s'il est hors d'usage et employé sans ressort. De cette élasticité, résulte un frottement qui depasse de loin celui qu'offre l'autre qui n'a pas de fente. On the other hand, the only advantage of the split segment which rests on the possibility of enclosing it in the monolithic piston, gives it an initial elasticity, even if it is out of use and used without spring. From this elasticity, results a friction which far exceeds that offered by the other which has no slot.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7919634A FR2475672A1 (en) | 1979-07-31 | 1979-07-31 | Piston with non-split sealing rings - uses bolted head to secure demountable annular packing pieces locating sealing rings |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7919634A FR2475672A1 (en) | 1979-07-31 | 1979-07-31 | Piston with non-split sealing rings - uses bolted head to secure demountable annular packing pieces locating sealing rings |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2475672A1 true FR2475672A1 (en) | 1981-08-14 |
Family
ID=9228466
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7919634A Withdrawn FR2475672A1 (en) | 1979-07-31 | 1979-07-31 | Piston with non-split sealing rings - uses bolted head to secure demountable annular packing pieces locating sealing rings |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2475672A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2518668A1 (en) * | 1981-12-23 | 1983-06-24 | Agrichema Materialflusstechnik | APPARATUS FOR AIR PULSES, PARTICULARLY FOR STORAGE AND TRANSPORT FACILITIES OF BULK PRODUCTS |
US4714008A (en) * | 1985-11-21 | 1987-12-22 | Bowers Walter B | Piston for internal combustion engines and the like |
-
1979
- 1979-07-31 FR FR7919634A patent/FR2475672A1/en not_active Withdrawn
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2518668A1 (en) * | 1981-12-23 | 1983-06-24 | Agrichema Materialflusstechnik | APPARATUS FOR AIR PULSES, PARTICULARLY FOR STORAGE AND TRANSPORT FACILITIES OF BULK PRODUCTS |
US4714008A (en) * | 1985-11-21 | 1987-12-22 | Bowers Walter B | Piston for internal combustion engines and the like |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |