CH294100A - Piston machine. - Google Patents
Piston machine.Info
- Publication number
- CH294100A CH294100A CH294100DA CH294100A CH 294100 A CH294100 A CH 294100A CH 294100D A CH294100D A CH 294100DA CH 294100 A CH294100 A CH 294100A
- Authority
- CH
- Switzerland
- Prior art keywords
- piston
- ball joint
- rod
- housing
- grosse
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/0005—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 adaptations of pistons
- F04B39/0022—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 adaptations of pistons piston rods
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/14—Pistons, piston-rods or piston-rod connections
- F04B53/144—Adaptation of piston-rods
- F04B53/147—Mounting or detaching of piston rod
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fats And Perfumes (AREA)
Description
Machine ä piston. Cette invention a pour objet une maehine ä piston presentant au moins ui piston 'a simple effet pourvu dune Grosse, et qui pour- rait eire, par exemple, -an eompresseur, une pompe ou im moteur. Piston machine. This invention relates to a piston engine having at least one single-acting piston provided with a diameter, and which could be, for example, a compressor, a pump or a motor.
Cette inachine pourrait e"tre en particulier un compresseur ä piston ä haute Pression Jans lequel les pistons des etages superieurs sont des pistons ä simple effet pourvus d'ime crosse et soumis ä des Pressions considerables en fin de cottrse. Des eompresseurs de ce genre sont employes plus particulierement pour 1'ali- mentation de reseaux de commande par fluide sous Pression ä Bord d'avions. 0n a dejä pro- pose, dans 1e Gas dune telle machine, par exemple, de construire ledit piston ä simple effet et la grosse de facon ä laisser audit pis- ton une certaine liberte de mouvement par rapport ä la Grosse pour tenir compte d'un manque d'alignement eventuel entre 1e guide de la grosse et 1e cylindre du piston. Selon une disposition dejä proposee, 1'extremite du piston qui Porte contre la face de la crosse est arrondie de maniere ä permettre un de placement lateral relatif desdits elements au Gas oü Ges derniers ne seraient pas alignes, du fait par exemple de defauts de fabrication. Selon une autre disposition proposee, 1'extre- mite de la erosse eomprend une Partie fai- sant saillie qui est munie dune cavite ä Bords resserres qui entourent. une tete elargie pre- `-ue ä 1'extremite du piston, cette disposition etant du meme genre que la liaison g6nerale- ment employee entre la tige de commande filetee et la soupape d'un robinet darret. Ces deux dispositions permet.tent 1e deplacement lateral relatif de 1a. Grosse et du piston lorsque les axes de Ges elements ne sont pas alignes. Elles presentent cependant 1'inconvenient qu'au Gas oü lesdits axes ne seraient pas pa ralleles, la poussee de la grosse sur 1e piston presente une composante laterale qui tend ä deplacer 1e piston lateralement par rapport au cylindre, ce qui a pour resultat une usure intempestive du piston et de la Partie corres- pondante de la paroi du cylindre. Cet incon- venient se fait particulierement sentir par exemple dans 1e Gas de compresseurs haute Pression du genre indique dans lesquels les fuites entre 1e piston et 1e cylindre doivent Etre reduites 1e plus possible. This machine could in particular be a high-pressure piston compressor in which the pistons of the upper stages are single-acting pistons provided with a butt and subjected to considerable pressures at the end of the stroke. Compressors of this type are used more particularly for supplying control networks by fluid under pressure on board aircraft. It has already been proposed, in the Gas of such a machine, for example, to construct said so as to leave said piston a certain freedom of movement with respect to the bass to take account of a possible lack of alignment between the guide of the bass and the cylinder of the piston. of the piston which bears against the face of the stock is rounded in such a way as to allow relative lateral placement of said elements in the gas where the latter would not be aligned, due for example to manufacturing faults. According to another proposed arrangement, the end of the shell comprises a protruding part which is provided with a cavity with constricted edges which surround it. an enlarged head provided at the end of the piston, this arrangement being of the same type as the connection generally employed between the threaded control rod and the valve of a stopcock. These two provisions allow the first relative lateral displacement of 1a. Grosse and the piston when the axes of Ges elements are not aligned. However, they have the disadvantage that in Gas where said axes are not parallel, the thrust of the gross on the piston presents a lateral component which tends to move the piston laterally with respect to the cylinder, which results in wear. the piston and the corresponding part of the cylinder wall. This disadvantage is particularly felt, for example, in the gas of high pressure compressors of the type indicated in which the leaks between the piston and the cylinder must be reduced as much as possible.
L'invention a pour but d'eliminer cet inconvenient, et, ä cet eilet, la machine objet de 1'invention est caracterisee en ce que ledit piston est relie ä 1a Grosse au moy en dune rotule engagee dann un logement presentant des parois spheriques de la Grosse, ledit pis- ton etant relie ä lädite rotule de facon ä pou- voir se deplacer lateralement par rapport ä cette rotule; 1e tont afin d'eliminer tonte usure du piston et du cylindre cooperant due ä un Maut d'alignement entre la grosse et 1e piston. The object of the invention is to eliminate this drawback, and, to this end, the machine which is the subject of the invention is characterized in that the said piston is connected to the Gross in the middle by a ball joint engaged in a housing having spherical walls de la Grosse, said piston being connected to said ball joint so as to be able to move laterally with respect to this ball joint; 1st piston to eliminate all wear of the piston and cooperating cylinder due to misalignment between the big and the 1st piston.
Le dessin represente, ä titre d'exemple, une forme d'execution de la maehine ä pis- ton objet de 1'invention, cette forme d'ex6eu- tion constituant un compresseur ä air dopt 1e troisieme etage est seul represente. The drawing shows, by way of example, one form of execution of the piston machine which is the subject of the invention, this form of execution constituting an air compressor on the third stage is represented alone.
La fig. 1 est une coupe longitudinale du cylindre et du piston dudit etage. fig. 1 is a longitudinal section of the cylinder and the piston of said stage.
La fig. 2 est une coupe selon la ligne 11-11. de la fig. 1. fig. 2 is a cut along line 11-11. of fig. 1.
La fig. 3 est une vue en bout de la erosse dudit etage. fig. 3 is an end view of the ross of said floor.
La fig. 4 est une coupe longitudinale par tielle dune variante. fig. 4 is a longitudinal section by tial of a variant.
Dans la forme d'execution representee aux fig. 1 ä 3, 1e compresseur comprend une bielle 1 qui est actionnee par un vilebrequin dopt Faxe de rotation est indique en 2, 1e pied de bielle etant relie ä une Grosse 3. Le piston 4 du troisieme etage, qui est ä simple effet et se deplace dans un cylindre 5 dont la culasse 6 prdsente des soupapes d'admission et d'echappement indiquees en 7, est relie ä, la erosse 3 dune maniere deerite plus partieu- lierement par la siüte. In the embodiment represented in FIGS. 1 to 3, the compressor comprises a connecting rod 1 which is actuated by a crankshaft with the rotational axis is indicated at 2, the connecting rod small end being connected to a Big 3. The third stage piston 4, which is single-acting and moved in a cylinder 5, the cylinder head 6 of which has the intake and exhaust valves indicated at 7, is connected to the cylinder head 3 in a more particular manner by the site.
La chemise du cylindre 5 est disposee dans un bäti 8 fixe ä un carter 9. Ledit bäti est muni Tune chemise cylindrique 10 qui pre- sente une bride pei-ipherique 11 qui empeche 1e deplacement axial de ladite chemise. L'ale- sage de la chemise est cylindrique, de meme axe que 1e cylindre 5 et sert de guide ä la erosse 3 dont la jupe est munie de bossages 12 perces d'alesages coaxiaux destines ä rece- voir un axe 13. Un logement 14 presentant des parois spheriques dont Fentree 15 est com- prise entre deux parois opposees paralleles 16 et deux parois incurvees 17 est pratique dann la erosse 3. L'a.xe dudit logement corres- pond avec Faxe de la chemise et 1e rayon de courbure des parois incurvees est egal au rayon des parois spheriques de ce logement. Une rotule 18 presentant des faces planes paralleles 19 et un ales.-ge 20 muni d'un epaulement 21 est engagee dans 1e logement 14. Laxe de 1'alesage 20 est dispose perpen- diculairement aux faces 19. The cylinder liner 5 is arranged in a frame 8 fixed to a casing 9. Said frame is provided with a cylindrical liner 10 which has a peripheral flange 11 which prevents the axial displacement of said liner. The bore of the liner is cylindrical, on the same axis as the cylinder 5 and serves as a guide for the rod 3, the skirt of which is provided with bosses 12 pierced with coaxial bores intended to receive a pin 13. A housing 14 having spherical walls whose entrance 15 is comprised between two opposite parallel walls 16 and two curved walls 17 is practical in the ross 3. The axis of said housing corresponds with the axis of the liner and the first radius of curvature of the curved walls is equal to the radius of the spherical walls of this housing. A ball joint 18 having parallel plane faces 19 and a bore 20 provided with a shoulder 21 is engaged in the first housing 14. The axis of the bore 20 is arranged perpendicular to the faces 19.
U ne vis 22 Passant ä travers 1'alesage 20 de la rotule 18 est vissee dans un tron filete pratique axialement dans l'extremite adja- cente du piston 4. Une goupille 23 assure ladite vis 22 dann 1e piston 4. La v is 22 eom- prend une tete 24, et un ressort de compres- sion 25 enroide autour de la vis 22 et dispose entre 1'epaulement 21 de la rotule 18 et la tote de cette vis 22 assure 1e eontact de la face anterieure plane du piston et de la faee 19 de la rotule 18. Les faces en contact de la rotule et du piston sont perpendieulaires ä faxe de ce dernier. La vis de liaison presente une Partie 26 de diamUre rediiit eomprise entre sa tete 24 et sa Partie filetee. A screw 22 passing through the bore 20 of the ball joint 18 is screwed into a practical threaded tron axially in the adjacent end of the piston 4. A pin 23 secures said screw 22 in the piston 4. The screw 22 comprises a head 24, and a compression spring 25 wrapped around the screw 22 and arranged between the shoulder 21 of the ball joint 18 and the head of this screw 22 ensures the contact of the flat anterior face of the piston and of the face 19 of the ball joint 18. The contact faces of the ball joint and of the piston are perpendicular to the axis of the latter. The connecting screw has a Part 26 of diamUre rediiit eomprise between its head 24 and its threaded Part.
Pour > gelier 1e piston ä la Grosse, la rotule <B>18</B> est introduite ä travers Fentree 15 dann une Position telle que les faces 19 soient en regard des parois laterales 16 de ladite entree, pais la rotule est tournee de 90 pour etre a.menee dans la Position representee aux fig. 1 et 2. La vis de liaison 22 peut alors eire vissee dans 1e piston 4. Dans la variante re- pr@sent6e ä la fig. 4, 1e logement ä parois spheriques 14 est menage partiellement dann 1e Corps de la erosse 3 et partiellement dann une Plaque 27 fixee sur ee Corps de crosse au moyen de vis dont les axes sont representes en 28. Pour 1e reste, Bette variante est iden- tique ä la forme d'execution des fig. 1 ä 3. In order to freeze the piston a la Grosse, the ball joint <B>18</B> is introduced through the inlet 15 in a position such that the faces 19 face the side walls 16 of said inlet, but the ball joint is turned by 90 to be a.menee in the position represented in fig. 1 and 2. Connecting screw 22 can then be screwed into piston 4. In the variant shown in FIG. 4, the first housing with spherical walls 14 is formed partially in the first body of the rod 3 and partially in a plate 27 fixed to the stock body by means of screws, the axes of which are represented at 28. For the rest, this variant is identical. - Tick to the embodiment of FIGS. 1 to 3.
<B>11</B> est fache de voir que dans 1e eas oü les axes du deplacement, de la Grosse 3 et du pis- ton 4 ne sont pas alignes, un mouvement. sofft angulaire, sofft lateral du piston 4 par rapport ä la erosse 3 peut se produire et, de ce fait, une usure anormale du piston et du eylindre est evitee. <B>11</B> is upset to see that in the case where the axes of displacement, Big 3 and Piston 4 are not aligned, a movement. Angular sofft, lateral sofft of the piston 4 with respect to the rim 3 can occur and, as a result, abnormal wear of the piston and the cylinder is avoided.
De plus, si 1e piston 3 grippe dans 1e ey- lindre, ce qui se produit generalement lors- que 1e piston se trouve au voisinage de la eu- lasse dudit eylindre Pendant la Bourse de com- pression dudit piston, la tension exercee sur la vis de liaison 22 est notablement plus Brande que la tension normale et provoque la rupture de la Partie de diamUre reduit de ladite vis au cours de la Bourse d'aspiration suivante, 1e piston etant laisse dans sa Position de point mort interieur, de plus Brands cle- < < ts etant ainsi evites. Moreover, if the piston 3 seizes in the cylinder, which generally occurs when the piston is in the vicinity of the end of said cylinder During the compression of said piston, the tension exerted on the connection screw 22 is significantly more Brande than the normal tension and causes the breakage of the reduced diameter part of said screw during the following suction exchange, the first piston being left in its internal neutral position, more Brands key- < < ts being thus avoided.
Claims (2)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB294100X | 1948-07-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH294100A true CH294100A (en) | 1953-10-31 |
Family
ID=10291134
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH294100D CH294100A (en) | 1948-07-17 | 1948-08-10 | Piston machine. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH294100A (en) |
-
1948
- 1948-08-10 CH CH294100D patent/CH294100A/en unknown
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