J. M. Voith Gmbh

Voith Turbo Gmbh Co. Kg

Franz Arbogast

Peter Peiz

Gerd Hundt

G&uuml;nther Nagel

Gunther Nagel

Thomas Neubert

Peter Piez

A motor-pump unit is provided that has at least two internal gearwheel pumps axially aligned that are driven off of the rotor of the electric motor. The rotor of the electric motor is U-shaped and is concentrically disposed about the pump. The web of the U-shape is disposed in the region of the rotational axis with internal toothing that meshes with pinions of the at least two internal gearwheel pumps.

Motor-pump unit

A pumping unit is provided with a pump that is partially disposed in a stator of an electric motor. The rotor is at an opposite end from the pump and is connected to the pump shaft to drive it for fluid flow. The pump shaft can be positioned in a central bore of the rotor and connected thereto via a meshing gear.

Pumping unit for a liquid medium

A hydraulic pump is provided that reduces or eliminates unwanted noise, local pressure waves, pressure pulsations or cavitation and the like through use of pressure and suction chambers that are in substantial fluid isolation except for a backflow connection with a predetermined flow cross section to the suction chamber.

Pumping device

An internal geared machine capable of forward and reverse operation in a closed circuit having a pinion and an internal toothed ring gear meshing with the pinion and disposed in a housing. A filling comprising two identical filler pieces fills a sickle-shaped space between the pinion and ring gear and a single stop pin mounted in the housing supports both of the filler pieces by their front ends. A pair of axial discs are seated on the pinion shaft on respective sides of the pinion and axial pressure fields and control fields provide opposing pressures against the axial discs.

Axial compensation in an inner geared pump for a closed circuit

A motor-pump unit including an electric motor and a pump. The pump is concentrically surrounded by the rotor/stator of the motor. The rotor of the electric motor is U-shaped, viewed in an axial section. The cross-piece of the &ldquo;U&rdquo;, in the region of the common axis, is provided with an interior toothing. The shaft of the pump includes a pinion that meshes with the interior toothing of the cross-piece of the &ldquo;U&rdquo;.

Motor-pump unit with pump shaft pinion enmeshed with motor rotor

The invention relates to an internal gear machine for reversed operation in a closed circuit comprising an outer-toothed pinion, an inner-toothed ring gear meshing with the pinion; a housing; a filing that fills the sickle-shaped space between the pinion and the ring gear; the filling comprises two identical filler pieces; a stop pin is provided that is mounted in the housing and against which the filler pieces are supported by their front faces; the housing has two pressure lines and a drain outlet; the filler pieces are symmetrically disposed relative to a plane (symmetrical plane) extending through the center points of the pinion and the ring gear; the two pressure lines are located on both sides of the symmetrical plane viewed in axial direction.

Internal gear machine for reversed operation in a closed hydraulic circuit

A sickleless gear wheel pump includes an internally geared hollow wheel including a plurality of tooth tips. A pinion includes a plurality of tooth tips and meshes with the hollow wheel. The hollow wheel and pinion are rotatably disposed in a housing. The housing has a suction connection and a pressure connection. The hollow wheel has openings for a medium to be pumped therethrough. Each tooth tip of the plurality of tooth tips of the hollow wheel has a profile groove in which there is present a sealing element that is radially moveable during rotation of the hollow wheel and pinion and which is in sliding seal-off engagement with a respective tooth tip of the plurality of tooth tips of the pinion. Each sealing element is metallic.

Sickleless internal gear wheel pump with sealing elements inserted into the tooth tips

An internal geared wheel pump that does not have a crescent shaped piece. The pump has an internal geared wheel that meshes with a pinion. The pinion and geared wheel are mounted in a rotatable manner in a housing that has a suction connection and a pressure connection. The geared wheel has passages that produce each time a conductive connection between the base of the tooth and the envelope surface of the geared wheel. Conductive connections are produced between the bearing flanks of the teeth of the geared wheel or the teeth of the pinion and the radial boreholes of the geared wheel.

Internal geared wheel pump without crescent-shaped [sickle] piece

A crescentless internal gear pump includes a housing with an intake connection and a pressure connection. An internally toothed internal gear has an outside surface and is disposed for rotation within the housing. Each tooth includes a head and a base, the internal gear having radial openings that form a conducting connection between a tooth base and the outside surface. A pinion, which is rotatably disposed within the housing and meshing with the internal gear, has teeth with each tooth including a head. The teeth of one of the internal gear and pinion, includes a profile groove with a base provided in the heads into which a sealing element is disposed and which slides on an opposing tooth head. The sealing element has a sealing surface and includes a channel that produces a conducting connection between the profile groove base and the sealing surface. The sealing element is slightly movable in the profile groove in the radial direction to form a controlled gap.

Crescentless internal gear pump

A sickleless internal gear pump with an internally toothed ring gear and a pinion meshing with the ring gear, the two fitted rotatably in a common casing. The ring gear includes radial conduits for the medium to be pumped and elements which are radially movably fitted in grooves in the tooth heads of the ring gear or pinion. The sealing elements slide on the opposing tooth head of the pinion or ring gear and include control spaces on which pressure is applied from the rear. For pressure application in the control spaces there is machined at least one control slot in the area of the pressure buildup zone, on at least one side of the part of the casing which laterally bounds the ring gear and pinion.

Sickleless internal gear pump

The invention is directed to a sickleless internal gear pump with an internal ring gear and a pinion meshing with the ring gear. The ring gear has radial apertures for the medium being pumped, and sealing elements radially movably disposed in an appropriate profile groove, and inserted in respective tooth heads of the ring gear, or in the tooth heads of the pinion. The sealing elements are able to slide on the opposite tooth heads of the pinion, or of the ring gear. The head shape of the sealing element and the shape of the tooth space bottom of the ring gear, or of the pinion, are configured such that the sealing element establishes a seal between the pressure space and the suction space in the area of dead center.

Sickleless internal gear pump having sealing elements in tooth heads

Internal gear pump with an internal gear, a thrust plate arranged on each side of the internal gear, a powered external pinion arranged eccentrically relative to the internal gear and meshing with it, and a sickle-shaped, floating filler part split in peripheral direction and bearing with its blunt end on an axial support pin. The first segment of the filler part that faces the teeth of the pinion has a greater radial thickness than its second segment facing the teeth of the internal gear. The first segment features in the parting interface at least one axially extending groove for accommodation of a sealing element. The first segment features at least one stop for restricting wear on the surface facing the teeth of the pinion.

Internal gear pump having a stop for a sickle-shaped filler part

The invention relates to a sickleless internal gear pump with an internally toothed ring gear and a pinion meshing with the ring gear. The pinion and ring gear are rotatably mounted in a housing having a suction port and a pressure port. The ring gear includes radial ports for the medium to be pumped. The tooth heads of the ring gear or the tooth heads of the pinion have a profile groove into which a plurality of sealing elements are respectively inserted. The sealing elements are able to slide on the radially opposite tooth of the pinion or ring gear. The invention is characterized by a profile groove, viewed in axially perpendicular section, which has no ports. The individual sealing elements are provided with a channel establishing a fluid connection between the interior of the profile groove and the sealing face of the sealing element. The channel, viewed in the direction of rotation of the pinion, is enveloped by the material of the sealing element.

Sickleless internal gear pump with cross-sectionally mushroom-shaped

The invention is directed to a sickleless internal gear pump including an internal ring gear and a pinion meshing with the ring gear. The internal ring gear and pinion having a common width and a plurality of teeth extending across the width. Each tooth has a tooth head with an involute profile. Each ring gear tooth includes a tooth head having a slot therein. The ring gear has a plurality of radial ports. A housing rotatably carries the internal ring gear and the pinion, and includes a suction port, a pressure port and an axial expanse corresponding to the teeth width. A plurality of sealing elements are respectively disposed in the ring gear tooth head slots. The sealing elements are radially movably disposed in the slots, and each sealing element defines an end face of the tooth head. The end face has an exterior profile corresponding to the involute profile. Each sealing element comprises a stop surface and a fixed stop. Each slot has a shape corresponding to and coacting with the stop surface and the fixed stop for limiting the radial movement of the sealing elements.

Sickleless internal gear pump with sealing elements inserted in the

The invention relates to a sickleless internal gear pump with an internal ring gear and a pinion meshing with the ring gear. The ring gear and pinion are rotatably mounted in a common housing part having an axial expanse corresponding to the width of the teeth of the ring gear and the pinion. The housing features a suction port and a pressure port. The ring gear features radial ports for the fluid medium to be pumped. Disposed in the pressure side region of the housing, opposite the rotating gearing parts of the ring gear and the pinion, is an axially movable axial disk exerting a force on the rotating gearing parts dependent on an axial pressure derived from the working pressure. The axially movable disk provides axial sealing by compensating for the gap between it and the fixed housing.

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Heidenheim, Germany

Franz Arbogast