PLANETARY TRANSMISSION OF A WIND TURBINE

The invention relates to a planetary transmission (4) of a wind turbine (1), comprising a ring gear (10), a sun gear (9), multiple planetary gear wheels (11) and a planetary carrier (15), wherein the planetary gear wheels (11) are slidingly mounted on the planetary shafts (12) thereof, wherein the planetary gear wheels (11) are arranged thereon coaxially relative to the planetary shafts (12), as well as comprising at least one cavity (23) on a surface (13.1; 13.2) of one of the two sliding partners (11, 12) that are in sliding contact with one another, wherein each cavity (23) extends axially and in the circumferential direction on the surface (13.1; 13.2) of the respective sliding partner (11; 12) and is formed with a radial depression in relation to the rest of the casing contour of said sliding partner (11; 12), and comprising a lubricant distribution unit (18; 20, 21) which is fed by a pump (19) and has first openings (22.1), wherein said first openings (22.1) terminate in the cavity/cavities (23). In order to improve the formation of a lubricant film, it is proposed that: each cavity provided on a surface (13.1; 13.2) of one of the two sliding partners (11; 12) that are in sliding contact with one another is a lubricant pocket (23), with an axial length L of at least 60% of the axial width (B1) of the planetary gear wheel (11); a circumferential groove (24; 30.1, 30.2) is provided, running entirely in the sliding partner (11; 12) that is arranged coaxially relative to the other sliding partner (11; 12) provided with at least one lubricant pocket (23) of this type, and/or which extends in the sliding partner (11; 12) provided with the at least one lubricant pocket (23), on the circumference thereof and exclusively between the lubricant pockets (23); and the lubricant distribution unit (18) comprises second openings (22.2) which terminate either in or opposite the circumferential grooves (24; 30.1, 30.2).