Abstract:
A reciprocating pump includes a housing, a rod, and a bellows. The housing surrounds a bellows chamber and a displacement chamber. A portion of the rod extends through the opening in the endcap and into the bellows chamber of the housing. A cross-section of the rod includes a lobed shape. The bellows is connected to the housing and to the rod such that the bellows surrounds a portion of the rod.
Abstract:
L'invention concerne une machine hydraulique comprenant: une enveloppe (14); un piston différentiel (1) présentant une couronne supérieure (23) ainsi qu'une base inférieure (27), propre à coulisser en mouvement alternatif respectivement dans l'enveloppe et dans un logement cylindrique (22) intérieur à l'enveloppe, le piston séparant deux chambres (16, 17) de l'enveloppe; des moyens de commutation hydraulique pour l'alimentation et l'évacuation en liquide des chambres séparées par le piston, ces moyens de commutation étant commandés par les déplacements du piston et comportent au moins une bielle (4) agissant sur un organe de distribution (12), ledit organe de distribution comportant un clapet supérieur (3) coopérant avec un premier siège (25) pratiqué dans la couronne supérieure (23) du piston et au moins un clapet inférieur (9) coopérant avec un second siège (26) pratiqué dans la base inférieure (27) du piston; et des moyens de déclenchement propres à provoquer, en fin de course du piston, un changement brusque de la position des moyens de commutation, sous l'action d'un moyen élastique (E), pour l'inversion de la course. Les sièges de clapet inférieur et supérieur admettent respectivement chacun une portion tronconique supérieure (25a; 26a) et une portion tronconique inférieure (25c; 26c) de conicité opposée entre elles. L'invention concerne également une pompe doseuse réversible comportant une telle machine hydraulique.
Abstract:
A plunger (10) located in a pipeline (20), which can be used as a pump or for pigging but which allows the pipeline (20) to be used as a normal pipeline when the plunger (10) is not in use includes an axial passage (12) extending in the same direction as the pipeline (20), wherein the axial passage (12) includes a valve (16) which can be used to open or close the passage (12) through the plunger (10). Means are provided to move the plunger (10) along the pipeline (20), and these may take the form of a magnet (14) in the plunger (10) and an electrical stator (22) in the pipeline (20), such that supply of electrical power to the stator (22) can be controlled to control the speed and direction of movement of the plunger (10). Stops (24, 26) may be provided to limit the range of movement of the plunger (10) in the pipeline (20), and one of these stops (24, 26) may be associated with a one-way valve.
Abstract:
Methods and systems relate to a pressure exchanger which exchanges pressure energy from a high pressure clean fluid system to a relatively low pressure harsh fluid system for use in pressurizing the harsh fluid and directing the fluid to a wellbore as high pressure harsh fluid without the harsh fluid contacting identified portions of the pressure exchanger.
Abstract:
A pump unit for feeding fuel, preferably, diesel fuel, to an internal combustion engine; the pump unit (1) comprising a head (5) inside which a cylinder (6) extending along an axis (Al) is formed; a pumping piston (7) extending along the axis (Al) and slidably coupled with the cylinder (6); and an intake valve (18) comprising a valve body (22) formed inside the head (5) and in communication with the cylinder (6).
Abstract:
Die Erfindung betrifft eine hydraulische Pumpeinrichtung zum Fördern eines Arbeits-, Kühl- und/oder Schmiermediums. Die Erfindung zeichnet sich dadurch aus, dass die Pumpeinrichtung als Kolbenpumpe mit einem hin und her bewegbaren Kolben ausgeführt ist, der mindestens eine Antriebsdruckfläche, die zum Antrieb der Pumpeinrichtung mit einem Antriebsdruck beaufschlagbar ist beziehungsweise beaufschlagt wird, und mindestens eine Arbeitdruckfläche aufweist, die einen Arbeitsdruckraum der Pumpeinrichtung begrenzt.
Abstract:
Provided herein are exemplary embodiments of an efficient pump apparatus. In one embodiment the pump apparatus comprises a piston assembly loosely disposed within a cylinder. The piston assembly includes a driving cable connecting a top leaky piston and a bottom leaky piston having a check valve connected thereto. The cylinder includes an outlet pipe at an upper portion thereof and a check valve located at a lower end of the cylinder. The pistons move in the cylinder at a velocity relative to the conduit such that as the pistons move along the cylinder they create a substantial tortuous leak path forming a hydrodynamic seal between the pistons and the cylinder.
Abstract:
The present disclosure provides a method and system for delivering a high- viscosity fluid 300. In an example, a reciprocating a piston pumps a high-viscosity fluid 300 through a one-way check valve 130 into a pump chamber 125. Responsive to receipt of a request for a dose of the high-viscosity fluid 300, an output valve 135 in the pump chamber 125 is opened, and the piston is reciprocated in order to eject a dose of the high-viscosity fluid 300 from the pump chamber 125 through the output valve 135.
Abstract:
A well pump assembly (24) has a barrel 54), a standing valve (48) at an upper end of a standing valve chamber (46), and a plunger (70). A travelling valve (82) admits well fluid into the barrel during a fill stroke. The travelling valve closes during a power stroke so that the plunger pushes well fluid from the barrel into the standing valve chamber. A gas release port (88) extends from the standing valve chamber to the exterior of the pump assembly. A check valve (90) in the gas release port has an outward flow blocking position for blocking liquid well fluid in the standing valve chamber from exiting through the gas release port while the plunger is in the power stroke. The check valve has a gas release position that enables gas present in the standing valve chamber to flow out the gas release port while the plunger is in the power stroke.