Transmission and method for operating a transmission

Abstract

A transmission includes a first transmission stage, a feedthrough extending through the first transmission stage, and a first deflector designed to deflect a lubricant away from the feedthrough.

Claims

1. A transmission, comprising: a first transmission stage including a planetary transmission and designed for installation in an installation position that encloses a non-zero angle with respect to a main axis of rotation of the transmission; a pitch tube extending through the first transmission stage parallel with the axis of rotation; an oil sump; and a first deflector having a rim which guides trapped oil from the first transmission stage in a direction of gravity into a circular channel away from the pitch tube into the oil sump.

2. The transmission of claim 1 for installation in a wind turbine.

3. The transmission of claim 1, further comprising a second deflector designed to deflect the lubricant away from the pitch tube.

4. The transmission of claim 3, wherein at least one of the first deflector and the second deflector is arranged on one end side of the transmission.

5. The transmission of claim 3, further comprising a second transmission stage, wherein at least one of the first deflector and the second deflector is designed to deflect the lubricant between the first transmission stage and the second transmission stage.

6. The transmission of claim 3, wherein the first transmission stage comprises a sun gear, said at least one of the first deflector and the second deflector being connected fixedly to the sun gear.

7. The transmission of claim 3, wherein at least one of the first deflector and the second deflector has a circular arc shape.

8. The transmission of claim 3, wherein at least one of the first deflector and the second deflector has a channel.

9. The transmission of claim 3, wherein at least one of the first deflector and the second deflector has a compensation for an inclination of the transmission.

10. The transmission of claim 3, wherein at least one of the first deflector and the second deflector projects into a circular-arc-shaped recess, with the at least one of the first deflector and the second deflector and the circular recess being arranged rotatably with respect to each other.

11. The transmission of claim 3, wherein at least one of the first deflector and the second deflector has an electrically insulating material.

12. The transmission of claim 1, wherein the non-zero angle is between 2? and 15?.

13. A method for operating a transmission which comprises a first transmission stage, a pitch tube extending through the first transmission stage parallel with in an installation position that encloses a non-zero angle with respect to a main axis of rotation of the transmission; a pitch tube extending through the first transmission stage parallel with the axis of rotation, an oil sump, and a first deflector, said method comprising installing the first transmission in an installation position that encloses a non-zero angle with respect to a main axis of rotation of the transmission; and deflecting with a first deflector having a rim trapped oil from the first transmission stage in a direction of gravity into a circular channel away from the pitch tube into the oil sump.

14. The method of claim 13, further comprising connecting the transmission to an electric machine such that the trapped oil is deflected away from the pitch tube by the first deflector.

15. The method of claim 13, further comprising deflecting the trapped oil away from the pitch tube by a second deflector of the transmission.

16. The method of claim 15, further comprising deflecting the trapped oil by at least one of the first deflector and the second deflector between the first transmission stage and a second transmission stage of the transmission.

Description

BRIEF DESCRIPTION OF THE DRAWING

(1) The present invention will be explained in more detail below by way of example with reference to drawings, in which:

(2) FIG. 1 shows a transmission in a sectional illustration,

(3) FIG. 2 shows a further transmission in a sectional illustration,

(4) FIG. 3 shows a detail of the further transmission,

(5) FIG. 4 shows a further detail of the further transmission, and

(6) FIG. 5 shows a third detail of the further transmission.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

(7) The illustration according to FIG. 1 shows a transmission 1 with transmission stages 2, 3 and 4. The transmission 1 has end sides 16 and 17. A feedthrough 13, also called pitch tube, leads through the transmission 1. The axis 20 of the pitch tube has an inclination 22 with respect to a horizontal 21. The transmission stages 2 have an internal gear 5, planetary gears 6 and sun gears 7. There are cavities, an axial space LSS 8 and an axial space IMS 9. Trapped oil enters said spaces, this being indicated by arrows 10.

(8) The illustration according to FIG. 2 shows a further transmission with transmission stages 2 and 3, wherein a first shielding system 11 and a second shielding system 12 are provided here. The shielding systems have deflectors 14 and 15. The deflectors deflect trapped oil. It is therefore possible for the pitch tube to remain free from trapped oil. An integrated protective system for deflecting trapped oil from the pitch tube is produced. In the case of this system, there is in particular a radially encircling deflection of oil between each sun and the closest rotor-side component. This shielding reduces the free space in front of the running gear. Most of the oil is therefore conducted directly into the oil sump. Shielding is configured in such a manner that there is an axial overlap with the sun, or the closest axially positioned component. By this means, the oil cannot pass directly onto the pitch tube. The shielding can be screwed to the sun, to the next closest component, or can be a geometrical part of the component or of the sun. A multiple shielding over different diameters is possible.

(9) The Illustration according to FIG. 3 shows a detail of the further transmission. The deflector 14 is fastened by screws 29. The deflector 14 has a channel 18 with an oblique channel base 24. Therefore, for example, an oblique installation of the transmission can be compensated for. The channel base 24 has an inclination 23 with respect to the horizontal 21. The deflector 14 has a rim 26 which projects into a space 25 in the sun gear 7.

(10) The illustration according to FIG. 4 has a further detailed illustration of the deflector 14. An approximately horizontal channel base is shown here by way of example.

(11) The Illustration according to FIG. 5 shows a further detail of the further transmission. It illustrates a second shielding system which is located in a region between the sun gear 7 and the sun gear 7. Oil can also accumulate here in a channel 31. The channel is located in a deflector 15. The deflector 15 has a rim 27 which projects between the sun gear 7 and the pitch tube 13. The deflector 15 also has a rim 32 which is at least partially located under an overhang 28 of the sun gear 7. Trapped oil can thus slide from the sun gear 7 via the overhang 28 and the rim 32 into the channel 31.