Wind turbine comprising a bearing for the rotor

The invention relates to a bearing for the rotor of a wind turbine with at least one outer ring, at least one inner ring and rolling elements, which are arranged between outer ring and inner ring, the outer ring and the inner ring having at least two raceways, the two Raceways an angle and the rolling bodies formed in roll form.

Bearings for the rotor of a wind turbine are in the art known. Reference is made to the<b>DE 101 02 255 A1</b>, the one with a wind turbine to be mounted on the top of a tower Machine carrier disclosed. There is provided that a storage Rolling is used, the one and moments is receiving bearing between a shaft sleeve and a hollow shaft. The bearing is preferably angled as double-row tapered roller bearings with mutually arranged rows of rollers formed. Each row of rollers can In this case, an angle of approximately 45 ° with the axis of the axle sleeve and the Include hollow shaft.

A similar storage is from the <b>WO 02/079644 A1</b> known. There will a wind turbine is disclosed in the for transmitting rotation Rotor to a generator is a planetary gear used. The Planetary gear assembly is equally in a two-row mounted bearings.

With the known solutions it is possible to both forces and Moments by a single bearing from the rotor to the tower a to transmit wind turbine. The double row bearing according to the prior Art, effect the transfer of the forces and torques, always formed in a so-called O-arrangement. This has the advantage, that a fairly large distance between supports of the bearing pressure centers to Recording the moment load results.

falls The larger the wind turbine and thus the stock is, the less However, this advantage, since - in relative terms - the difference of Support distances is getting smaller.

The known storage than double row bearing in O arrangement In addition, also some disadvantages. The problem, in particular that the input torque does not have a one-piece inner bearing ring can be transferred. Therefore, it is difficult, the rotor directly to the Bearing inner ring flanged. Similarly, no close-coupled the generator possible.

The invention is therefore the <b>task</b> based on a bearing assembly the type described above to provide that the mentioned disadvantages overcomes.

The <b>solution</b> this object by the invention is characterized in that the raceways of the outer ring the angle are inclusive arranged mutually inclined, and that the raceways the inner ring of the angular arranged including each averted are.

Preferably, the rolling elements are as tapered rollers or cylindrical rollers educated.

According to a preferred embodiment can be provided that divided at least one of the two bearing rings into individual bearing segments is trained. A subdivision of at least one of the bearing rings can also be given in the axial direction.

The angle enclosed by the raceways, is advantageously between 10 ° and 70 °, particularly preferably between 35 ° and 55 °.

In operation, the wind turbine can be provided that the Outer ring rotates; alternatively, in the operation of the wind power plant also the inner ring may be rotatable.

The proposed bearing arrangement will be compared to known prior art achieves several advantages:

It is now possible, the input torque transmission via a one-piece inner bearing ring to accomplish. A wave is not this required.

It is also possible, the rotor directly to the bearing inner ring flanging. Likewise, a direct flange connection on the output side to Transmission or possible to the generator.

The critical, solid inner ring fit on the shaft, which rotates with him Inner ring is required (at circumferential load on inner ring), can be omitted. Thus, no longer results in the risk of fretting corrosion occurs.

Furthermore, there will be no extra system deformation over the shaft.

The elimination of the required solid inner ring seat there no influence on the assembly, which means to the production plant ingrained clearance or preload. This ensures that the clearly defined value of the clearance or preload after installation and is reduced in the tolerance.

The drawing shows an embodiment of the invention is shown. It show:<dl tsize="7"><dt>figure 1</dt><dd>schematically a wind power plant in the side view and</dd><dt>figure 2</dt><dd>the section through the mounting of the rotor of the wind turbine.</dd></dl>

1 shows a wind turbine 3 is shown, which comprises a rotor. 2 This must be relative in a storage 1 to the tower of the wind turbine 3 be stored. In particular, the forces F and moments M have that acting from the rotor 2 on the tower of the wind turbine 3, the storage 1 was added.

The construction of the storage 1 is shown in FIG. 2 The bearing consists of a double row tapered roller bearings. For this rolling elements 8 are in the form of Tapered rollers between an outer ring 4 and an inner ring 5 is arranged.

Both the outer ring 4 and the inner ring 5 each have two Raceways 6, 7. The raceways 6, 7 each include a mutually Angle α or β a, who is entered in FIG. 2

As further seen, while the raceways 6 of the outer ring 4 so to each other that they form the angle α with each other and while the tracks and especially their surfaces inclined to each other are. In contrast, close the raceways 7 of the inner ring 5 even an angle β, but the tracks are 7 or its surface away from one another.

This results in that the double row tapered roller bearing as X-storage is trained.

It is not shown that the outer ring 4 and / or the inner ring of 5 may be composed individual ring segments. Similarly, it is possible, the outer ring 4 and / or the inner ring 5 in Lagerachsrichtung divided form.

In the embodiment of Figure 2 can be seen that the outer ring 4 is composed of two axially split partial rings.

In the upper part of Figure 2 illustrates that the outer ring 4 clamped can be. Alternatively, shows the lower part in Figure 2 that the may be the outer ring 4 is screwed to a support member.

To guide the individual tapered rollers 8 are equally different Possibilities are conceivable. For example, the rollers may outboard out be. Alternatively, they may be inboard out.

<u>LIST OF REFERENCE NUMBERS</u>

<dl tsize="1" compact="compact"><dt>1</dt><dd>storage</dd><dt>2</dt><dd>rotor</dd><dt>3</dt><dd>Wind Turbine</dd><dt>4</dt><dd>outer ring</dd><dt>5</dt><dd>inner ring</dd><dt>6</dt><dd>Raceways of the outer ring</dd><dt>7</dt><dd>Raceways of the inner ring</dd><dt>8th</dt><dd>rolling elements</dd></dl><dl tsize="1" compact="compact"><dt>α</dt><dd>angle</dd><dt>β</dt><dd>angle</dd><dt>F</dt><dd>force</dd><dt>M</dt><dd>moment</dd></dl>