A rotary module includes a first outer tube, a first member in which a function of the channel is maintained when a first outer tube rotates relative to a first inner tube, the channel coupling an outside of the first outer tube and an inside of the first inner tube, and a second member in which electrical coupling between the first terminal provided on an inner circumference surface of a second outer tube and the second terminal provided on an outer circumference surface of a second inner tube is maintained when the second outer tube rotates relative to the second inner tube, wherein the first outer tube and the second outer tube are fixed, the first inner tube and the second inner tube are fixed, and the first member and the second member are arranged along the same axis as each other.

A swivel arrangement including high voltage electrical swivels concentrically arranged around a common axis, each swivel including: a first annular housing part and a second annular housing part together defining an internal annular volume; a first solid electrical conductor stationary with respect to the first annular housing part, and a second solid electrical conductor stationary with respect to the second annular housing part, wherein the first and second electrical conductors are arranged within the internal annular volume for making conductive sliding contact with each other, wherein the first annular housing part and second annular housing part are rotatable relative to each other around the common axis while the first and second electrical conductors are in sliding contact with each other; wherein the swivels are arranged concentrically around the common axis so that a plane normal to the axis intersects at least two, preferably three, of the electrical swivels.

The present disclosure describes an electrical machine. The Electrical machine includes a stator, a rotor, a winding fitted to the rotor, and an apparatus for supplying electrical energy to the winding. The apparatus includes a slip ring and a brush assembly including a brush holder and a brush. The slip ring and the brush assembly are arranged in a housing. An annular gap is disposed between the slip ring and the housing. The housing is fluidically substantially sealed in relation to an exterior, and a flow path of air is routed through the housing in a closed arrangement. The housing includes a housing part fluidically connected to the annular gap via a first flow opening and a second flow opening. A flow section of the flow path is routed through the housing part, and leads from the first flow opening to the second flow opening.

The present disclosure describes an electrical machine. The Electrical machine includes a stator, a rotor, a winding fitted to the rotor, and an apparatus for supplying electrical energy to the winding. The apparatus includes a slip ring and a brush assembly including a brush holder and a brush. The slip ring and the brush assembly are arranged in a housing. An annular gap is disposed between the slip ring and the housing. The housing is fluidically substantially sealed in relation to an exterior, and a flow path of air is routed through the housing in a closed arrangement. The housing includes a housing part fluidically connected to the annular gap via a first flow opening and a second flow opening. A flow section of the flow path is routed through the housing part, and leads from the first flow opening to the second flow opening.

An externally driven conveyor pulley with an integrated thermal control system by which the temperature of the pulley may be controlled whether the pulley is rotating or stationary. The present invention includes a rotary connection device (or plurality of such devices) designed to transfer fluid (liquid or gaseous) or electrical current into/out of a rotating object. The rotary connection device may be a slip-ring for electrical power transfer or a rotary union for liquid transfer, but any device designed to transmit fluid or electricity into a rotating object could be utilized. In one embodiment, temperature control is achieved by transmitting temperature controlled fluids through the pulley via at least one rotary connection device. In an alternative embodiment, temperature control is achieved by transmitting electricity via the rotary connection device to a temperature regulating device in the rotating object. The temperature regulating device could be any electrical heating or cooling unit.

An externally driven conveyor pulley with an integrated thermal control system by which the temperature of the pulley may be controlled whether the pulley is rotating or stationary. The present invention includes a rotary connection device (or plurality of such devices) designed to transfer fluid (liquid or gaseous) or electrical current into/out of a rotating object. The rotary connection device may be a slip-ring for electrical power transfer or a rotary union for liquid transfer, but any device designed to transmit fluid or electricity into a rotating object could be utilized. In one embodiment, temperature control is achieved by transmitting temperature controlled fluids through the pulley via at least one rotary connection device. In an alternative embodiment, temperature control is achieved by transmitting electricity via the rotary connection device to a temperature regulating device in the rotating object. The temperature regulating device could be any electrical heating or cooling unit.

An alternator includes a housing and a rotary shaft. The alternator includes one or more brushes supported by the housing. The alternator includes a slip ring assembly coupled to the rotary shaft for rotating with the rotary shaft. The slip ring assembly includes one or more slip rings. The one or more slip rings include a body portion defining an outer surface. The one or more slip rings also include an oxide layer disposed on the outer surface of the body portion. The oxide layer is non-uniform. The oxide layer is formed on account of a thermal oxidation process of the one or more slip rings during an operation of the alternator. Further, the thermal oxidation process for formation of the oxide layer initiates when an operating temperature of one or more components of the alternator lies within a predetermined temperature threshold range.

An alternator includes a housing and a rotary shaft. The alternator includes one or more brushes supported by the housing. The alternator includes a slip ring assembly coupled to the rotary shaft for rotating with the rotary shaft. The slip ring assembly includes one or more slip rings. The one or more slip rings include a body portion defining an outer surface. The one or more slip rings also include an oxide layer disposed on the outer surface of the body portion. The oxide layer is non-uniform. The oxide layer is formed on account of a thermal oxidation process of the one or more slip rings during an operation of the alternator. Further, the thermal oxidation process for formation of the oxide layer initiates when an operating temperature of one or more components of the alternator lies within a predetermined temperature threshold range.

A rotary joint includes a first part and a second part configured to rotate around a rotation axis against the first part. The first part has a first magnetic core, a sliding brush, and a capacitive data link component. The second part has a second magnetic core for coupling power with the first magnetic core, a sliding track for galvanic coupling with the sliding brush, and a second capacitive data link component to transfer data from and/or to the first capacitive data link component. To weaken magnetic stray fields from the magnetic core, the rotary joint is a disc-type rotary joint, and the sliding track is arranged radially between the second magnetic core and the second capacitive data link component.

A rotary joint includes a first part and a second part configured to rotate around a rotation axis against the first part. The first part has a first magnetic core, a sliding brush, and a capacitive data link component. The second part has a second magnetic core for coupling power with the first magnetic core, a sliding track for galvanic coupling with the sliding brush, and a second capacitive data link component to transfer data from and/or to the first capacitive data link component. To weaken magnetic stray fields from the magnetic core, the rotary joint is a disc-type rotary joint, and the sliding track is arranged radially between the second magnetic core and the second capacitive data link component.