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1. EP1327074 - ARRANGEMENT AT A PISTON ENGINE AND METHOD OF CONTROLLING THE PISTONS

Office
European Patent Office
Application Number 01975044
Application Date 13.09.2001
Publication Number 1327074
Publication Date 16.07.2003
Publication Kind B1
IPC
F04B 9/04
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
9Piston machines or pumps characterised by the driving or driven means to or from their working members
02the means being mechanical
04the means being cams, eccentrics or pin-and-slot mechanisms
F04B 1/14
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
1Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
12having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
14having stationary cylinders
F04B 11/00
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
11Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation
CPC
F04B 1/146
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
1Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
12having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
14having stationary cylinders
141Details or component parts
146Swash plates; Actuating elements
F04B 9/042
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
9Piston machines or pumps characterised by the driving or driven means to or from their working members
02the means being mechanical
04the means being cams, eccentrics or pin-and-slot mechanisms
042the means being cams
F04B 11/0066
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
11Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation
005using two or more pumping pistons
0058with piston speed control
0066with special shape of the actuating element
Applicants NAT OILWELL NORWAY AS
Inventors MOE MAGNE
KYLLINGSTAD ÅGE
Designated States
Priority Data 0100374 13.09.2001 NO
20004596 15.09.2000 NO
Title
(DE) EINRICHTUNG AN EINER KOLBENMASCHINE UND METHODE UM DIE KOLBENBEWEGUNG ZU REGELN
(EN) ARRANGEMENT AT A PISTON ENGINE AND METHOD OF CONTROLLING THE PISTONS
(FR) SYSTEME DESTINE A UN MOTEUR A PISTONS ET PROCEDE DE COMMANDE DES PISTONS
Abstract
(EN)
A piston engine in the form of a piston pump or a piston engine (motor) comprises two or more piston cylinders (14b, 14c), preferably positioned with the same angular distances of 180 degrees for two cylinders, 120 degrees for three cylinders etc. with regards to an axis, and each comprising a reciprocating piston with a projecting piston rod (18b, 18c). Via the piston rods (18b, 18c), each piston is given a controlled displacement matched to the controlled, given displacement of another or other pistons. The control means is rotatable and influences the projecting outer end portions of the piston rods or parts fitted to these, for instance rotatable rollers (20b, 20c). By a piston pump of this type, the piston are to contribute to impelling a fluid flow, while a piston engine of this type shall be designed to be driven by a fluid flow. Operating conditions are aimed at which give a more even volume flow, i.e. without any significant fluctuations. For this purpose, said rotatable control means is designed with an encircling cam surface (52) which the piston rod ends abut via the peripheral surface of said rotatable rollers (20b, 20c). According to a feature of a method associated with the application of such a piston engine, each piston may with advantage be driven at a constant speed through part of its power stroke.

(FR)
Un moteur à pistons se présentant sous forme d'une pompe à piston ou d'un moteur à pistons comprend au moins deux cylindres (14b, 14c) de piston qui sont de préférence placés à la même distance angulaire de 180 degrés pour deux cylindres, de 120 degrés pour trois cylindres et autres par rapport à un axe, chacun comprenant un piston alternatif comportant une tige (18b, 18c) de piston en saillie. Par l'intermédiaire des tiges (18b, 18c) de piston, chaque piston effectue un déplacement commandé qui correspond au déplacement commandé et donné d'un autre piston ou des autres pistons. Le moyen de commande peut tourner et agit sur les parties terminales externes des tiges de piston ou de parties fixées sur ces dernières, telles que par exemple des galets rotatifs (20b, 20c). A l'aide d'une pompe à piston de ce type, les pistons contribuent à déplacer un écoulement de fluide alors qu'un moteur à pistons de ce type est prévu pour être entraîné par un écoulement de fluide. Les conditions de fonctionnement sont prévues pour produire un écoulement de fluide plus uniforme, c'est-à-dire qui ne fluctue pas significativement. Pour cette raison, le moyen de commande rotatif est conçu avec une surface (52) de came circonférentielle contre laquelle les extrémités des tiges de piston viennent buter par l'intermédiaire de la surface périphérique des galets rotatifs (20b, 20c). Selon une caractéristique d'un procédé associé à l'utilisation d'un tel moteur à pistons, chaque piston peut être avantageusement entraîné à une vitesse constante par une partie de son temps moteur.

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ROa 2003 00207This application is not viewable in PATENTSCOPE because the national phase entry has not been published yet or the national entry is issued from a country that does not share data with WIPO or there is a formatting issue or an unavailability of the application.