Buhler Motor Gmbh

Buehler Motor Gmbh

Olai Ihle

Thomas Peterreins

Klaus Weiske

Georg Bernreuther

Armin Suttner-Reimann

Helmut Schmidt

Helmut Kellermann

Christian Zimmerer

Thomas Stolpe

Gerhard Walter

Paul Zimmermann

A centrifugal pump impeller in an electromotive centrifugal pump, the impeller including a base body having a bearing to which is attached, on a first end, a permanent-magnetic rotor and, on a second end, a cover disk that is mounted on the base body; and a plurality of pump blades made of first and second parts, the first part being a base blade segment attached to the base body thus forming a first unitary piece and a cover disk blade segment attached to the cover disk thus forming a second unitary piece.

Centrifugal pump impeller

An electronically commutated DC motor for a liquid pump, comprising a pump housing, a suction connection and a pressure connection, a substantially disk-shaped pump rotor mounted rotatably in the pump housing, the rotor comprising an impeller having a plurality of pump vanes and a permanent magnet, a partition separating a pump space from a dry space, wherein the partition is disposed in an axial gap between the pump rotor and a plurality of axially parallel oriented stator poles of the DC motor, which are each provided with an insulating body and a stator winding, the stator poles adjoin a stator yoke, which is connected to a metallic heat-conducting body, and the stator containing the stator poles, the stator windings, the stator yoke and the heat-conducting body is disposed in a motor housing made of plastic material. By providing that the stator is surrounded by a flexible foil, and at least a large part of the foil is disposed inside the motor housing radially around the stator windings, a simple solution ensures good shielding against interference in an existing electronically commutated DC motor, without requiring modifications to the existing design.

Electronically commutated DC motor for a liquid pump

A centrifugal pump with an existing pump housing made of plastic material that can be processed through injection molding, the pump housing having a first housing section featuring a suction nozzle and a pressure nozzle, a second housing section supporting an electronically commutated DC motor and a split case, a motor housing section that closes a dry chamber separated from a wet chamber by the split case in which a stator and electronic components are arranged, and a permanent magnet rotor that is mounted in the wet chamber in such a way that it can rotate, thereby driving a pump impeller that reaches into the pump chamber. The electronic components are arranged on an electronic circuit board parallel to a base of the split case. The electronic circuit board is in heat conducting contact with the base.

Centrifugal pump

An electrically commutated DC motor () for a liquid pump () with a pump housing () with a suction connector () and a pressure connector () for connection to a hydraulic circuit, an essentially disk-like pump rotor () mounted to rotate in the pump housing, consisting of an impeller () with several pump vanes and a permanent magnet (), a partition () separating a pump space () from a dry space (), the partition being arranged in an axial gap () between the pump rotor () and several axially aligned stator poles (), each provided with an insulation element () and stator windings (). The task of the present invention is to configure a DC motor, so that it can be installed simply and reliably, is designed particularly robust and therefore has very high lifetime.

Electrically commutated DC motor for a liquid pump

An electrically commutated DC motor () for a liquid pump () with a pump housing () with a suction connector () and a pressure connector () for connection to a hydraulic circuit, an essentially disk-like pump rotor () mounted to rotate in the pump housing, consisting of an impeller () with several pump vanes and a permanent magnet (), a partition () separating a pump space () from a dry space (), in which the partition is arranged in an axial gap () between the pump rotor () and several axially aligned wound stator poles () of the DC motor. The present invention configures a DC motor, so that it can be installed simply and reliably, is designed particularly robust and therefore has a very long operating lifetime.

A centrifugal pump comprising a pump housing made of injection-molded plastics with a first housing part, which is designed as a single piece with a suction connection and a pressure connection, and comprises a sealing area, by means of which said first housing part is joined in a liquid-tight manner to a second housing part, that receives an electric motor, and a motor housing part. In this centrifugal pump, very good leak tightness is achieved with minimum number of parts, minimum weight and minimum assembly costs with universal applicability without impairing the visual overall impression of the centrifugal pump. This objective is achieved in that the second housing part is made of a material that is permeable to laser light of a wavelength or a wavelength range, and the first housing part is made of a material that absorbs the same laser light, and the first housing part and the second housing part are heat-sealed to one another.

The invention relates to an electric motor comprising a permanent magnet rotor, which is supported rotationally about a central axis, a wound stator having a cylinder ring-shaped stator winding, claw poles, which are disposed perpendicularly to ring disc-shaped stator plates and around the central axis, and a cylinder jacket-shaped yoke ring, the length of the claw poles in the axially parallel direction being clearly greater than half the inner diameter of the stator. It is the object of the invention to provide an electric motor, in which the stator is composed of the least number of components, requires simple assembly and has a robust structure and optimum efficiency, thereby enabling greater design flexibility, usability of installation space and thus an economic construction. This objective is solved according to the invention in that the magnetically conductive part of the stator comprises a cylinder jacket-shaped yoke ring and two ring disc-shaped stator plates, the stator plates are each designed as a single piece with a plurality of claw poles and the ring disc-shaped stator plates comprise ends, which are connected to one another.

Electric motor

The invention relates to an electric motor having a permanent magnetic rotor supported in a rotatable fashion around a central axis, a wound stator with a cylindrical stator winding, claw poles, perpendicular in reference to the disc-shaped stator plates and arranged around the central axis, and a tubular return ring connected to the stator plates free from play. The object of the invention is to provide an electric motor, in which the stator is composed from as few parts as possible, with its assembly being simple, its construction being robust, and being provided with an optimum effectiveness, allowing a great freedom of design and space used and thus an economical structure. This object is attained according to the invention in the disc-shaped stator plates being in one piece with the claw poles and being calked to the return ring with the disc-shaped stator plates.

A permanent magnet rotor having a shaft, a hollow cylindrical permanent magnet and an elastic connecting medium between the shaft and the permanent magnet. The permanent magnet is arranged co-axially around the shaft to ensure that the permanent magnet is mounted securely, that it is not damaged during large temperature fluctuations, and that it is not deflected impermissibly from the axis of rotation in case of heavy radial load. A simple installation process uses a mechanical connection between the shaft and the permanent magnet. This task is performed by virtue of the fact that an elastic connecting medium is arranged along the periphery of the shaft at several first areas in which the distance between the shaft and the permanent magnet is enlarged. These first areas are separated from the second areas in which the distance between the shaft and the permanent magnet is minimized but not zero.

Growing community of inventors

Eckental, Germany

Olai Ihle