A discharge device for discharging electric currents from a rotor part of a machine having a shaft. The discharge device has a displaceable contact element received at least partially in a guide unit and serving to form an electrically conductive sliding contact between a sliding contact surface of the contact element provided for forming the sliding contact and a shaft contact surface, the contact element being connected to the guide unit and/or a retaining element of the machine in an electrically conductive manner and the contact element being pre-loaded towards the shaft contact surface by a spring element, the contact element being wetted at least partially by a lubricating and cooling fluid, the guide unit comprising a guiding part for receiving the contact element and a retaining part for receiving the guiding part, the retaining part and the guiding part forming a duct for the lubricating and cooling fluid.

A discharge device for discharging electric currents from a rotor part of a machine having a shaft. The discharge device has a displaceable contact element received at least partially in a guide unit and serving to form an electrically conductive sliding contact between a sliding contact surface of the contact element provided for forming the sliding contact and a shaft contact surface, the contact element being connected to the guide unit and/or a retaining element of the machine in an electrically conductive manner and the contact element being pre-loaded towards the shaft contact surface by a spring element, the contact element being wetted at least partially by a lubricating and cooling fluid, the guide unit comprising a guiding part for receiving the contact element and a retaining part for receiving the guiding part, the retaining part and the guiding part forming a duct for the lubricating and cooling fluid.

A contacting device for transmitting electric currents of a rotor part of a machine, said rotor part being formed by a shaft and/or slip ring, to a machine, and to the use of a discharge device, wherein the discharge device comprises a contact element for forming an electrically conductive sliding contact between a sliding contact surface of the contact element, said sliding contact surface being provided in order to form the sliding contact, and a rotor contact surface of the shaft or the slip ring, and a recess is formed in the sliding contact surface. The contact element is at least partly coated with an oily fluid, in particular at least in the region of the sliding contact surface.

A contacting device for transmitting electric currents of a rotor part of a machine, said rotor part being formed by a shaft and/or slip ring, to a machine, and to the use of a discharge device, wherein the discharge device comprises a contact element for forming an electrically conductive sliding contact between a sliding contact surface of the contact element, said sliding contact surface being provided in order to form the sliding contact, and a rotor contact surface of the shaft or the slip ring, and a recess is formed in the sliding contact surface. The contact element is at least partly coated with an oily fluid, in particular at least in the region of the sliding contact surface.

A discharge device for discharging electric currents from a rotor part of a machine, said rotor part having a shaft, the discharge device comprising an axially displaceable contact element, which is at least partly accommodated in a guide, for forming an electroconductive sliding contact between a sliding contact surface of the contact element and a shaft contact surface of the shaft, the sliding contact surface being provided for forming the sliding contact, the contact element being electroconductively connected to the guide and/or a retaining element of the machine, and the contact element being prestressed towards the shaft contact surface by means of a spring element, the contact element being at least partly wetted with an oily fluid, in particular at least in the area of its sliding contact surface.

A discharge device for discharging electric currents from a rotor part of a machine, said rotor part having a shaft, the discharge device comprising an axially displaceable contact element, which is at least partly accommodated in a guide, for forming an electroconductive sliding contact between a sliding contact surface of the contact element and a shaft contact surface of the shaft, the sliding contact surface being provided for forming the sliding contact, the contact element being electroconductively connected to the guide and/or a retaining element of the machine, and the contact element being prestressed towards the shaft contact surface by means of a spring element, the contact element being at least partly wetted with an oily fluid, in particular at least in the area of its sliding contact surface.