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CN-121976929-A - Bearing assembly for wind power plant

CN121976929ACN 121976929 ACN121976929 ACN 121976929ACN-121976929-A

Abstract

The present invention relates to a bearing assembly for a wind power plant for supporting a drive train on a tower of the wind power plant. The bearing assembly has a base plate that is mountable on a tower. The bearing assembly further includes a bearing housing for receiving and supporting the drive train, and a coupling device. The coupling device has a coupling element for converting a torque about a torque axis applied by the drive train to the bearing housing into a bracing force acting in a bracing direction. The coupling device also has a support element for introducing a bracing force from the coupling element into the base plate. The coupling device is configured for allowing translation of the bearing housing relative to the base plate in a transverse direction perpendicular to the torque axis and the bracing direction. The invention also relates to a wind power facility.

Inventors

  • Arnault Klein Hitpas

Assignees

  • 采埃孚股份公司
  • ZF风能安特卫普有限公司

Dates

Publication Date
20260505
Application Date
20251023
Priority Date
20241030

Claims (11)

  1. 1. Bearing arrangement for a wind power installation (1) for supporting a drive train (10) on a tower (2) of the wind power installation (1), having a base plate (20) which can be mounted on the tower (2), having a bearing housing (22) for receiving and supporting the drive train (10), and having a coupling device (24) which has a coupling element (26) for converting a torque (80) applied by the drive train (10) to the bearing housing (22) about a torque axis (70) into a bracing force (82) acting in a bracing direction (72) and a support element (28) for introducing the bracing force (82) from the coupling element (26) into the base plate (20), wherein the coupling device (24) is configured to allow the bearing housing (22) to translate relative to the base plate (20) in a transverse direction perpendicular to the torque axis (70) and the bracing direction (74).
  2. 2. Bearing assembly according to claim 1, characterized in that the support element (28) is configured as a sliding element enabling a translation of the bearing housing (22) in the transverse direction (74) relative to the base plate (20).
  3. 3. Bearing assembly according to claim 1 or 2, characterized in that it has two coupling means (24) arranged on opposite sides of the torque axis (70).
  4. 4. Bearing assembly according to any of the preceding claims, characterized in that the bearing assembly has a further coupling element (30; 32) for transmitting forces in the transverse direction (74) from the bearing housing (22) to the base plate (20).
  5. 5. Bearing assembly according to any of the preceding claims, wherein the support element (28) is configured for bearing a force in the direction of the torque axis (70).
  6. 6. Bearing assembly according to any of claims 1-4, characterized in that the baseplate (20) is rotatably supported on the tower (2) about a yaw axis (76), that the support element (28) is configured to allow a translation in a circumferential direction about the yaw axis (76), and that the bearing assembly has a further coupling element (30; 32) for converting a yaw moment about the yaw axis (76) on a bearing housing (22) into a force in the lateral direction (74), and that the further coupling element (30; 32) for converting the yaw moment is further configured for introducing a force in the lateral direction (74) into the baseplate (20).
  7. 7. Bearing assembly according to any of the preceding claims, wherein one of the coupling elements (26; 30; 32) has a connecting rod which is configured to transmit tensile and compressive forces and which is rotatably supported at its two ends.
  8. 8. Bearing assembly according to any of the preceding claims, wherein one of the coupling elements (26; 30; 32) is configured as a fork (40).
  9. 9. Bearing assembly according to claim 8, wherein one of the coupling elements (26; 30; 32) has a damping element.
  10. 10. Wind power installation (1) with a drive train (10), a tower (2) and a bearing assembly according to any of the preceding claims, which bearing assembly is arranged on top of the tower (2).
  11. 11. Wind power installation (1) according to claim 10, wherein the bearing element (28) of the bearing assembly overlaps the wall of the top side of the tower (2) in a bracing direction (74).

Description

Bearing assembly for wind power plant Technical Field The present disclosure relates to a bearing assembly for a wind power plant. The present disclosure also relates to a wind power plant having a bearing assembly. Background Wind power installations for generating electricity by converting wind energy are known. For conversion, a rotor is provided in such installations, which rotor is designed to convert wind energy into mechanical power, for example into a rotation with a torque. The torque thus generated may be introduced into the drive train in order to be converted into electrical power, for example by means of a generator. In view of the large weight and forces generated in large wind power installations, for example with a power of several megawatts, high demands are made on the supporting drive train with respect to load carrying capacity and vibration characteristics. Disclosure of Invention A first aspect of the present disclosure relates to a bearing assembly for a wind power plant for supporting a drive train on a tower of the wind power plant. The wind power plant may have a rotor. The rotor may be configured to convert wind energy into rotational mechanical energy and introduce the rotational mechanical energy into the drive train. The wind power plant may have a tower and a nacelle that houses and supports at least portions of the drive train. The nacelle may be arranged at the upper end of the tower. The nacelle may be rotatably mounted on the tower. The nacelle is rotatable about a vertical yaw axis in order to perform a yaw movement of the nacelle with respect to the tower. The wind power plant may have yaw bearings for providing yaw movement. Yaw movement may be used to orient the nacelle or the drive train in a horizontal plane with respect to the wind, for example, in order to achieve a desired angle of attack with respect to the wind direction. The lower end of the tower may be anchored to the ground. Alternatively, the lower end of the tower may be placed on an offshore wind facility platform. The drive train may include a generator to convert wind energy into electrical energy. The rotor may be connected to the generator, for example, via a rotor shaft of the drive train. The rotor may have a plurality of rotor blades, for example three rotor blades. The drive train may have a hub through which the rotor is coupled to the rotor shaft. The hub may be configured to adjust the angle of attack of the rotor blade. The drive train may have a transmission which is arranged in the torque flow between the rotor and the generator. The generator may be configured to generate an electric current using the rotation of the rotor shaft or the rotation of the output of the transmission. The transmission may be configured for converting the rotational speed of the rotor shaft into a further, for example higher, rotational speed for driving the generator. In operation, the rotational speed of the rotor shaft may be, for example, between 2 and 30 revolutions per minute, for example, between 5 and 20 revolutions per minute. In operation, the rotational speed for driving the generator may be, for example, between 500 and 3000 rpm, for example between 900 and 2000 rpm. The drive end of the transmission can be mechanically operatively connected to the rotor, and the output end of the transmission can be mechanically operatively connected to a generator, for example. The transmission may be configured to transfer torque from the rotor shaft to the generator. In operation, the torque at the output of the transmission may be, for example, between 500,000 Nm and 15,000,000 Nm, for example between 3,000,000 Nm and 10,000,000 Nm. The drive train may also have an auxiliary unit. These auxiliary units may be configured for influencing parameters of the rest of the drive train and physical parameters of the wind power installation. These auxiliary units may for example comprise a heating system, a cooling system, an orientation system for the nacelle, a conditioning system for the hub and/or a converter system for the generated electrical energy, such as an inverter. The bearing assembly may be configured to support at least several degrees of kinematic freedom of the drive train. These kinematic degrees of freedom may include three translational and three rotational. The bearing assembly may be configured to support one, more or all degrees of freedom of the drive train or portions thereof. Depending on the design of the bearing assembly, a further bearing assembly may be provided which locks the degrees of freedom of the unconstrained (freibleibende) and/or supports the part of the drive train which is not supported by the bearing assembly. In principle, for the operation of a wind power installation, it may be necessary to maintain five of the six degrees of freedom of the rotor shaft. The rotational freedom of the rotor shaft can remain unconstrained during operation in order to be able to effect a rotation of