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JP-7139529-B2 - Method for replacing plain bearing elements in rotor bearings of wind turbines and nacelle for wind turbines

JP7139529B2JP 7139529 B2JP7139529 B2JP 7139529B2JP-7139529-B2

Inventors

  • グンター ハーガー
  • ヨハネス セバスティアン ヘルツル

Assignees

  • ミバ・グライトラーガー・オーストリア・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング
  • ミバ・グライトラーガー・オーストリア・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング

Dates

Publication Date
20220920
Application Date
20191209
Priority Date
20191209

Claims (7)

  1. A method for replacing plain bearing elements (14, 15) of a rotor bearing (8) of a wind turbine (1), comprising: The rotor bearing (8) has an inner ring element (12) and an outer ring element (13), and between the inner ring element (12) and the outer ring element (13) the plain bearing (8). Elements (14, 15) are positioned, said inner ring element (12) and said outer ring element (13) are rotatable relative to each other ; Said plain bearing elements (14, 15) have a plurality of individual plain bearing pads (24) , and when replacing said plain bearing elements (14, 15), the individual plain bearing pads (24) are replaced one after the other. and replace it with a new sliding bearing pad (24), without removing said inner ring element (12) and said outer ring element (13) when replacing the individual plain bearing pads (24) of said plain bearing elements (14, 15) , A rotor hub (6) is attached to said inner ring element (12) and each of said plain bearing pads (24) is removably attached to said inner side of said rotor bearing (8) by at least one attachment means (18). A method for replacing plain bearing elements (14, 15) respectively mounted on a ring element (12), comprising: The method comprises the following method steps: pivoting the rotor hub (6) relative to the nacelle housing (4) of the nacelle (2) until one of the plurality of plain bearing pads (24) reaches an unloaded plain bearing pad replacement position; removing the sliding bearing pad (24) at the sliding bearing pad replacement position and inserting a new sliding bearing pad (24) in place of the removed sliding bearing pad (24); rotating the rotor hub (6) with respect to the nacelle housing (4) of the nacelle (2) until the other of the plurality of plain bearing pads (24) reaches the said plain bearing pad replacement position; removing the sliding bearing pad (24) at the sliding bearing pad replacement position and inserting a new sliding bearing pad (24) in place of the removed sliding bearing pad (24); performing said steps until all of the old plain bearing pads (24) have been replaced with new plain bearing pads (24); A method for replacing plain bearing elements (14, 15), characterized in that:
  2. In the replacement work, all the individual slide bearing pads (24) are replaced, 2. A plain bearing pad according to claim 1, characterized in that for replacing an individual plain bearing pad (24), the plain bearing pad (24) to be replaced is moved into the plain bearing pad replacement position and is unloaded. Method.
  3. both said inner ring element (12) and said outer ring element (13) are V-shaped, A first plain bearing element (14) and a second plain bearing element (15) with a plurality of individual plain bearing pads (24) axially relative to each other between two ring elements (12, 13). are spaced apart from the two plain bearing elements (14, 15) are arranged at an angle (17) to each other in cross section, Due to the tilting torque (11) acting on said rotor hub (6), one of the two plain bearing elements (14, 15) is in its uppermost position (27) and the two plain bearing elements (14 , 15) are each unloaded in their lowest position (28) and provided with a plain bearing pad change position.
  4. said rotor hub (6) is attached to said inner ring element (12), said plain bearing pads (24) of said plain bearing elements (14, 15) are attached to said inner ring element (12); said first plain bearing element (14) remote from said rotor hub (6) is unloaded in its lowest position (28), said second plain bearing element (15) closer to said rotor hub (6) is unloaded in an uppermost position (27), 4. The method according to claim 3, characterized in that the rotation of the rotor hub (6) moves the individual plain bearing pads (24) of the plain bearing elements (14, 15) into the plain bearing pad replacement position. Method.
  5. 5. Any one of claims 1 to 4, characterized in that at each instant when replacing the plain bearing elements (14, 15) at least one of the plain bearing pads (24) remains in the rotor bearing (8). or the method described in paragraph 1.
  6. Said rotor hub (6) is received by a receiving device (29), said rotor hub (6) is subjected to a force by said receiving device (29), in which case the plain bearing pad (24) to be replaced is not subjected to load, The method according to any one of claims 1 to 5 , characterized in that:
  7. 7. Method according to any one of the preceding claims, characterized in that during replacement the plain bearing pad (24) is moved in the replacement direction (30) parallel to the sliding surface (19). .

Description

The present invention relates to a method for replacing a plain bearing element of a rotor bearing and a nacelle for a wind turbine. It is known from the prior art to remove the rotor from the nacelle housing in order to replace the rotor bearings. This work is very cumbersome and therefore time consuming. During outages, no electricity can be produced, so maintenance of the wind turbine must be done in the shortest possible time. FIG. 1 is a schematic diagram of a wind turbine.FIG. 2 is a diagram schematically showing a cross section of the nacelle.FIG. 3 is a cross - sectional view along section line III--III in FIG.FIG. 4 is a detail view of detail x in FIG. It should be noted at the outset that in the differently described embodiments, identical parts are provided with identical reference numerals or identical component designations, and disclosures contained throughout the description refer to identical references. Identical parts with reference numbers or identical component designations can be semantically interchanged. Also, the positional descriptions selected in the description, such as top, bottom, side, etc., relate to the figures directly described and shown, which positional descriptions have meaning when the position changes. be relocated to a new location according to FIG. 1 schematically shows a wind turbine for generating electrical energy from wind energy. A wind turbine 1 has a nacelle 2 , which is rotatably mounted on a tower 3 . The nacelle 2 has a nacelle housing 4 which forms the main structure of the nacelle 2 . In the nacelle housing 4 of the nacelle 2 electrical components are arranged, for example the generator of the wind turbine 1 . Furthermore, a rotor 5 is formed, which has a rotor hub 6 and rotor blades 7 arranged thereon. Rotor hub 6 is considered part of nacelle 2 . Rotor hub 6 is rotatably received in nacelle housing 4 by rotor bearing 8 . The rotor bearing 8 used to support the rotor hub 6 in the nacelle housing 4 of the nacelle 2 is designed to absorb radial forces 9, axial forces 10 and tilting torques 11. FIG. Axial force 10 is provided by the force of the wind. Radial force 9 is caused by the weight of rotor 5 and acts on rotor 5's center of gravity. Since the center of gravity of the rotor 5 is located outside the rotor bearing 8 , a tilting torque 11 is produced by the radial force 9 in the rotor bearing 8 . Tilting torque 11 may also be caused by uneven loading of rotor blades 7 . The rotor bearing 8 according to the invention can for example have a diameter of between 0.5m and 5m. Of course, it is also conceivable for the rotor bearing 8 to be smaller or larger. In FIG. 2, the nacelle housing 4 and the rotor hub 6 are shown in a schematic cross-sectional representation, the structure, in particular its dimensions, being highly schematic. As can be seen from FIG. 2, the rotor bearing 8 can have at least one inner ring element 12 and at least one outer ring element 13 . At least one plain bearing element 14 , 15 is arranged between the inner ring element 12 and the outer ring element 13 . In particular, a first plain bearing element 14 and a second plain bearing element 15 can be arranged between the inner ring element 12 and the outer ring element 13 . As can be seen from FIG. 2, the inner ring element 12 can be connected with the rotor hub 6 . In particular, the rotor hub 6 can be arranged on the rotor shaft 16 . The inner ring element 12 can be attached directly to the rotor shaft 16 . Of course, in another embodiment not shown, the inner ring element 12 could be attached directly to the rotor hub 6 as well. In a further non-illustrated embodiment, of course, the inner ring element 12 could be attached to the nacelle housing 4 and the rotor hub 6 could be connected with the outer ring element 13 . As can be seen from FIG. 2, both the inner ring element 12 and the outer ring element 13 can be V-shaped, and on each V-shaped flank between the two ring elements 12, 13, an axis Two plain bearing elements 14, 15 can be formed, which are spaced apart from each other in the direction. In particular, the two plain bearing elements 14, 15 can be arranged at an angle 17 with respect to each other. As can be seen from FIG. 2, in one embodiment the plain bearing element 14 can be attached to the inner ring element 12 by attachment means 18 . A sliding surface 19 can thus be formed between the plain bearing elements 14 , 15 and the outer ring element 13 . If the plain bearing elements 14, 15 are arranged as shown in FIG. 2, the sliding surface 19 can likewise be V-shaped. In a non-illustrated embodiment, the plain bearing elements 14, 15 between the two ring elements 12, 13 can also be formed as radial bearings and/or as axial bearings. As can also be seen from FIG. 2, the inner ring element 12 can be formed split with respect to its axial extension in order to facilitate assembly of the rotor bearing 8 . In the embodiment not shown, of course, the inner ring element 12 is fo