Systems and methods to mitigate electrical voltage on a rotating shaft in an oil rich environment exposed to a viscous fluid or immersed in oil are disclosed. An example grounding brush assembly includes a plurality of conductive filaments configured to extend through the viscous medium surrounding the rotating shaft to be in electrical contact with the rotating shaft when the brush assembly is disposed proximate the shaft.

A combined cooling and abrasion particles removal system and method for providing cooling and removing abrasion particles in a contact region between a brush and a slip ring of an electromechanical machine, the system comprising a passage for accommodating the brush and having a front opening adapted to face the slip ring, at least one supply tube with an outlet for blowing a gaseous medium at least partially into a direction towards a free space adjacent to the front opening, and at least one suction tube with an inlet opening for sucking off the gaseous medium and the abrasion particles from the free space. In order to pick up abrasion particles and provide sufficient cooling, the free space merges with a vortex chamber for generating a vortex of the gaseous medium carrying the abrasion particles in operation of the system.

A combined cooling and abrasion particles removal system and method for providing cooling and removing abrasion particles in a contact region between a brush and a slip ring of an electromechanical machine, the system comprising a passage for accommodating the brush and having a front opening adapted to face the slip ring, at least one supply tube with an outlet for blowing a gaseous medium at least partially into a direction towards a free space adjacent to the front opening, and at least one suction tube with an inlet opening for sucking off the gaseous medium and the abrasion particles from the free space. In order to pick up abrasion particles and provide sufficient cooling, the free space merges with a vortex chamber for generating a vortex of the gaseous medium carrying the abrasion particles in operation of the system.

A high voltage electrical swivel includes a first part and a second part, which are mobile relative to each other and form a closed internal chamber, each of the two parts including at least one electrical connector; and at least one electrical track electrically linked to a connector of one of the two parts and at least one brush assembly electrically linked to a connector of the other of the two parts, the at least one brush assembly cooperating with the at least one electrical track to establish an electrical contact, the at least one electrical track and the at least one brush assembly being housed in the closed internal chamber. The closed internal chamber is filled with a dielectric insulating gas having a dielectric strength greater than that of the air surrounding the electrical swivel.

A high voltage electrical swivel includes a first part and a second part, which are mobile relative to each other and form a closed internal chamber, each of the two parts including at least one electrical connector; and at least one electrical track electrically linked to a connector of one of the two parts and at least one brush assembly electrically linked to a connector of the other of the two parts, the at least one brush assembly cooperating with the at least one electrical track to establish an electrical contact, the at least one electrical track and the at least one brush assembly being housed in the closed internal chamber. The closed internal chamber is filled with a dielectric insulating gas having a dielectric strength greater than that of the air surrounding the electrical swivel.

Systems and methods to mitigate electrical voltage on a rotating shaft in an oil rich environment exposed to a viscous fluid or immersed in oil are disclosed. An example grounding brush assembly includes a plurality of conductive filaments configured to extend through the viscous medium surrounding the rotating shaft to be in electrical contact with the rotating shaft when the brush assembly is disposed proximate the shaft.

Disclosed is a high voltage electrical swivel including: a first part and a second part, which are mobile relative to each other and form a closed internal chamber, each of the two parts including at least one electrical connector; and at least one electrical track electrically linked to a connector of one of the two parts and at least one brush assembly electrically linked to a connector of the other of the two parts, the at least one brush assembly cooperating with the at least one electrical track to establish an electrical contact, the at least one electrical track and the at least one brush assembly being housed in the closed internal chamber. The closed internal chamber is filled with a dielectric insulating gas having a dielectric strength greater than that of the air surrounding the electrical swivel.

A current carrying system for use in transporting electrical current between a plurality of electrical devices is provided. The current carrying system includes a busbar having a first axial end, a second axial end, an electrically conductive shaft extending from the first axial end to the second axial end, and at least one cooling feature defined in at least a portion of the electrically conductive shaft. The current carrying system also includes a casing that defines a busbar channel configured to receive the busbar such that the casing at least partially circumscribes the busbar. The current carrying system also includes an air vent defined by the at least one cooling feature and the casing, wherein the air vent is in flow communication with ambient air, and the cooling feature is configured to facilitate a flow of air from the ambient air through the air vent.

A combined cooling and abrasion particles removal system and method for providing cooling and removing abrasion particles in a contact region between a brush and a slip ring of an electromechanical machine, the system comprising a passage for accommodating the brush and having a front opening adapted to face the slip ring, at least one supply tube with an outlet for blowing a gaseous medium at least partially into a direction towards a free space adjacent to the front opening, and at least one suction tube with an inlet opening for sucking off the gaseous medium and the abrasion particles from the free space. In order to pick up abrasion particles and provide sufficient cooling, the free space merges with a vortex chamber for generating a vortex of the gaseous medium carrying the abrasion particles in operation of the system.

The invention relates to a suction system (10) intended to suck up dust generated by a brush (1) rubbing against a rotary element (3) of a rotating electric machine without sucking up the surrounding air. For this purpose, the suction system comprises a gas-ejection device (20) comprising at least one slot (21) opening out around at least a portion of the lower end (12a) of a through housing (12) receiving a brush (1) or a brush holder (2) and around at least a portion of the opening (15) of a dust suction chamber (14).

This slot is further configured to direct a gas flow exiting through the at least one slot in a direction away from the opening of the suction chamber, thus forming an air curtain isolating the latter from the surrounding air.