摘要:
The purpose of the present invention is to suppress the occurrence of unevenness in a rotor of an internal gear pump, suppress the formation of gaps between the end surfaces (side surfaces) of an inner rotor and an outer rotor, and to prevent a decline in volume efficiency. Thus, the pump device of the present invention includes an internal gear pump (10), in which an inner rotor (13) is inscribed to an outer rotor (12), and includes a plate member (7) which is provided to an end surface of the rotors. The plate member (7) is formed of a material having high hardness, has a shape that does not block a suction port (150), has a through-hole (73) formed therein, and has O-ring grooves (71,72), which each have a continuous shape and house an O-ring formed therein.
摘要:
Zahnradpumpe mit mindestens zwei im Außeneingriff kämmenden Zahnrädern (16A, 16B), die mit ihren Flachseiten direkt oder indirekt an Gehäusedeckeln (14A, 14B) der Zahnradpumpe anliegen. Zumindest ein Antriebszahnrad (16A) ist mit Wellenzapfen versehen und drehfest damit verbunden, wobei die Wellenzapfen beidseitig des mindestens einen Antriebszahnrades angeordnet und in dem jeweils benachbarten Gehäusedeckel (14A, 14B) drehgelagert sind. Einer der Wellenzapfen des Antriebszahnrades (16A) ist verlängert und als Antriebsdrehzapfen (18A) durch den benachbarten Gehäusedeckel (14A) nach außen geführt. Um das Austreten von zu pumpendem Fluid zu verhindern, ist eine Wellendichtung (26) für den Antriebsdrehzapfen (18A) vorgesehen. Die Wellendichtung ist auf der den Pumpenzahnrädern (16A, 16B) zugewandten Innenseite des von dem Antriebsdrehzapfen (18A) durchdrungenen ersten Gehäusedeckels (14A) in einer zahnradseitigen Aussparung (24) des Gehäusedeckels (14A) angeordnet. Erfindungsgemäß ist diese Aussparung dabei mit einer auf der dem Pumpenraum zugewandten Seite angeordneten Vorkammer (24A) versehen, wodurch die Wellendichtung (26) mit ständig sich austauschendem zu pumpendem Fluid versorgbar ist.
摘要:
The present application discloses an electric pump including a housing; a motor unit including a stator disposed in the housing, a rotor rotatably disposed on the stator and a rotating shaft inserted in and passing through the rotor; and a pump unit comprising an inner rotor coupled to one end of the rotating shaft and an outer rotor, the pump unit having an inserting recess for receiving the pump unit.
摘要:
A gear pump is described with a plurality of gear wheels which intermesh in order to deliver a pumping medium, are held rotatably in a pump case and deliver a pumping medium from a priming zone into a delivery pressure zone of the pump case. One of the gear wheels is driven by a pump shaft which protrudes with a coupling end out of the pump case. In order to seal the pump case, a shaft sealing ring is held around the circumference of the pump shaft, wherein, in order to avoid material deposits, the shaft sealing ring is assigned, according to the invention, an interior flushing chamber on the circumference of the pump shaft, the flushing chamber being connected to the delivery pressure zone of the pump case by a feed channel in the pump case.
摘要:
A pump unit is provided with: a drive shaft (4) which is mounted such that it can rotate in a pump body (3) in order to operate both a piston pump which can feed a fuel, preferably diesel fuel, to an internal combustion engine, and a gear pump (2) which can feed the fuel to the piston pump; an annular gasket (7) arranged between the pump body (3) and the drive shaft (4) for separating, in a fluid-tight manner, two chambers (8, 9) to which the fuel is fed; and a reinforcing element (26) which is mounted inside one of the chambers (8, 9) in order to at least limit the deformation of the gasket (7) resulting from the pressure of the fuel.
摘要:
The present invention provides a rotor drive mechanism capable of reducing the longitudinal size of a pump apparatus and the volume of a fluid accommodating space in a casing, and improving the accuracy of a discharge rate. A rotor drive mechanism 25 is configured to transfer rotation of a driving shaft 38 to an external screw type rotor 22 of a uniaxial eccentric screw pump 23 via a connecting shaft 39, the driving shaft 38 being rotated such that the center thereof is located at a fixed position. The rotor drive mechanism 25 is configured such that: the driving shaft 38 includes an inner space 46 which is open toward the rotor 22; the connecting shaft 39 is inserted in the inner space 46; a rear end portion of the connecting shaft 39 is connected to the driving shaft 38 via a second joint portion 48; a tip end portion of the connecting shaft 39 is connected to the rotor 22 via a first joint portion 47; and a first seal portion 55 seals between an inner peripheral surface of an opening of the driving shaft 38, the opening being open toward the rotor 22, and an outer peripheral surface of the rotor shaft 37 connected to the rotor 22 configured to carry out an eccentric rotational movement.
摘要:
A pump unit (1) of a vane-type pump having no dedicated housing is proposed, comprising a drive shaft (5), a rotor (7) that interacts with the drive shaft (5) and accommodates vanes (19), a contour ring (9) surrounding the rotor (7), and a first and a second side plate (11, 13) which are disposed laterally of the contour ring (9).