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CN-122029352-A - Positioning system and method

CN122029352ACN 122029352 ACN122029352 ACN 122029352ACN-122029352-A

Abstract

The invention relates to a positioning system (10) for positioning at least one machine tool (11) along an inner surface (12) of a blade root section (13) of a wind turbine blade (14), comprising at least one trolley (16), at least one rail element (15) for guiding the trolley at least partially along the inner surface (12), and at least one tool carrier (17) for carrying the machine tool (11), wherein the trolley (16) is movably mounted on the rail element (15) such that the trolley (16) is at least partially movable along the rail element (15), and wherein the tool carrier (17) is rigidly mounted on the trolley (16) such that the tool carrier (17) is movable along the rail element (15) by moving the trolley (16).

Inventors

  • B. Jamindra Reta
  • F. J. Gonzalez Vasquez
  • P. Enigas Chacharo
  • J. Orduna Raymond

Assignees

  • 西门子歌美飒可再生能源创新与技术有限公司

Dates

Publication Date
20260512
Application Date
20240807
Priority Date
20230825

Claims (15)

  1. 1. A positioning system (10) for positioning at least one machine tool (11) along an inner surface (12) of a blade root section (13) of a wind turbine blade (14), comprising at least one trolley (16), at least one guide rail element (15) for guiding the trolley at least partly along the inner surface (12), and at least one tool carrier (17) for carrying the machine tool (11), wherein the trolley (16) is movably mounted on the guide rail element (15) such that the trolley (16) is movable at least partly along the guide rail element (15), and wherein the tool carrier (17) is rigidly mounted on the trolley (16) such that the tool carrier (17) is movable along the guide rail element (15) by moving the trolley (16).
  2. 2. The positioning system (10) according to claim 1, It is characterized in that the method comprises the steps of, At least one guide rail (15) is formed as a ring or ring segment extending between an inner radius (Ri) and an outer radius (Ro) along a circumferential direction (U), wherein preferably the trolley (16) is movable in a plane extending between the inner radius (Ri) and the outer radius (Ro) along the circumferential direction (U) when the trolley is mounted on the guide rail element (15).
  3. 3. Positioning system (10) according to any of the preceding claims, It is characterized in that the method comprises the steps of, The at least one rail element (15) comprises at least one connection interface (15.1) for connecting the rail element (15) to at least one additional rail element (15), wherein preferably the at least one connection interface (15.1) is designed as a dovetail or a dovetail cutout.
  4. 4. The positioning system (10) according to claim 3, It is characterized in that the method comprises the steps of, Comprises a plurality of rail elements (15), wherein each rail element (15) of the plurality of rail elements (15) is connected to at least one other rail element (15) of the plurality of rail elements (15) via at least one connection interface (15.1) to form a continuous rail.
  5. 5. Positioning system (10) according to any of the preceding claims, It is characterized in that the method comprises the steps of, At least one rail element (15) comprises at least one groove (15.2) and at least one trolley (16) comprises at least one engagement element (16.1), wherein the engagement element (16.1) is designed to at least partially engage the groove (15.2) when the trolley (16) is mounted on the rail element (15).
  6. 6. The positioning system (10) according to claim 5, It is characterized in that the method comprises the steps of, At least one engagement element (16.1) comprises at least one contact device (16.2) for at least temporarily contacting the rail element (15) when the trolley (16) is mounted on the rail, wherein a gap between the engagement element (16.1) and the rail element (15) can be at least partially adjusted by the contact device (16.2).
  7. 7. Positioning system (10) according to any of the claims 5 or 6, It is characterized in that the method comprises the steps of, At least one engagement element (16.1) and/or at least one groove (15.2) is at least partly made of antifriction material, preferably plastic, to reduce friction between the engagement element (16.1) and the guide rail element (15) when the trolley (16) is moved along the guide rail element (15).
  8. 8. Positioning system (10) according to any of the preceding claims, It is characterized in that the method comprises the steps of, The trolley (16) and/or the tool carrier (17) comprises at least one fastening means (18), and wherein the rail element (15) comprises at least one fastening recess (19), and wherein at least one fastening means (18) can be introduced at least partially into the fastening recess (19) when the trolley (16) is mounted on the rail element (15) to fix the trolley (16) to the rail element (15) in at least one machining position (I) such that movement of the trolley (16) relative to the rail element (15) is prevented.
  9. 9. Positioning system (10) according to any of the preceding claims, It is characterized in that the method comprises the steps of, The rail element (15) comprises at least one set of fixation recesses (19) for at least partially receiving at least one fixation means (18) of the trolley (16) and/or the tool carrier (17), wherein the fixation recesses (19) of the set of fixation recesses (19) are arranged along an arc of a circle, preferably at equidistant angular intervals.
  10. 10. Positioning system (10) according to any of the preceding claims, It is characterized in that the method comprises the steps of, The tool carrier (17) comprises at least one receiving section (17.1) for at least partially receiving the machine tool (11), wherein preferably at least one receiving section (17.1) extends at least partially perpendicular to an extension of the rail element (15) in a circumferential direction (U).
  11. 11. Positioning system (10) according to any of the preceding claims, It is characterized in that the method comprises the steps of, The tool carrier (17) comprises at least one tool-working recess (17.2) for at least partially passing at least one tool of the machine tool (11) through the tool carrier (17), wherein preferably the tool-working recess (17.2) is formed in the same plane as at least one receiving section (17.1), wherein preferably The tool carrier (17) comprises at least one guiding adapter (17.3) for additionally guiding at least one tool of the machine tool (11) after passing the tool through the tool working recess (17.2).
  12. 12. Positioning system (10) according to any of the preceding claims, It is characterized in that the method comprises the steps of, The tool carrier (17) comprises at least one contact means (17.4) for at least temporarily contacting an inner surface (12) of the wind turbine blade (14) when the trolley (16) is fixed in a machining position (I), and/or the tool carrier (17) comprises at least one stabilizing fin (20) for absorbing bending moments introduced into the tool carrier (17) when the machine tool (11) is operated.
  13. 13. Positioning system (10) according to any of the preceding claims, It is characterized in that the method comprises the steps of, Comprises at least one positioning aid (21), wherein the positioning aid (21) is designed to indicate the position, preferably the center, of at least one blade insert (22) of the blade root section (13).
  14. 14. Method (100) for using a positioning system (10) according to any of the preceding claims on a wind turbine, wherein the wind turbine comprises a nacelle and at least one wind turbine blade (14), wherein the wind turbine blade (14) is connected to the nacelle via a blade bearing (23), wherein preferably at least the following steps are performed in the following order: -attaching (110) the rail element (15) to the blade bearing (23), -Mounting (120) the trolley (16) on the rail element (15), and -Moving (130) the trolley (16) at least partly along the rail element (15) to a machining position (I).
  15. 15. The method (100) of claim 14, It is characterized in that Comprising at least one of the following steps: -fixing the trolley (16) at least temporarily to the rail element (15) in at least one machining position (I) such that movement of the trolley (16) relative to the rail element (15) is prevented, preferably by introducing at least one fixing means (18) of the trolley (16) or the tool carrier (17) at least partially into a fixing recess (19) of the rail element (15), When the trolley (16) is fixed in a machining position (I), the inner surface (12) of the wind turbine blade (14) is preferably at least temporarily contacted by contact means (17.4) of the tool carrier (17), -Using at least one positioning aid (21) to align at least one fixing recess (19) of the rail element (15) with the center of at least one blade insert (22) of the wind turbine blade (14) at least with respect to the circumferential position of the center of the blade insert (22) and the center of the fixing recess (19).

Description

Positioning system and method Technical Field The present invention relates to a positioning system for positioning at least one machine tool according to claim 1, and to a method for operating a positioning system according to claim 14. Background Blade root joints between wind turbine blades and the nacelle, preferably the blade bearings of the nacelle, are critical structures of the wind turbine. Damage to the blade root joint may lead to an undesired detachment of the blade from the wind turbine during operation. However, for different reasons, wind turbine blades in operation may produce blade root damage that negatively affects the blade root joints. Those reasons may relate to adverse operating conditions of the wind turbine blade leading to high loads in the area of the blade root. However, manufacturing-related or design-related issues may also be highly relevant. The cause of the failure may be fatigue or damage of the blade inserts, which are incorporated into the blade laminate at the blade root and are typically distributed around the circumference of the blade root, preferably in equidistant segments. These blade inserts are intended to at least partly receive bolts for fastening the blade to a blade bearing of the nacelle. It is thus apparent that the blade inserts play a vital role in relation to the load transfer between the wind turbine blade and the nacelle of the wind turbine, preferably the blade bearing. If fatigue or damage to the blade insert is detected, the wind turbine blade may be structurally reinforced in the relevant surface area by applying additional reinforcing elements on the inner or outer surface of the wind turbine blade. This allows to prevent failure of the blade root joint and to ensure a continuous non-destructive operation of the wind turbine. The application of such stiffening elements to a wind turbine blade requires a high local accuracy, since the area in which the blade insert of the wind turbine blade is located must be stiffened exactly. Thus, the machining steps for preparing for attaching the reinforcing element, such as drilling fastening holes in the surface of the blade, for example, have to be performed with a suitable accuracy with respect to the positioning of the fastening holes. The fact that the blade inserts are located inside the blade and are visible only to a limited extent emphasizes this problem, as it is difficult to identify the correct drilling position on the surface of the wind turbine blade. Because of the great precision and caution required in performing maintenance work on the blades, the blades are typically removed from the wind turbine nacelle and brought to the ground for such maintenance. This requires a lot of work and high costs, and a correspondingly long downtime of the wind turbine. It is therefore an object of the present invention to at least partially overcome one or more of the problems. In particular, it is an object of the present invention to provide a positioning system and a method for operating a positioning system, which enable a highly accurate positioning of at least one machine tool for performing machining of a wind turbine blade with required precision at different desired machining positions, preferably in order to provide reinforcement of at least one blade insert of the wind turbine blade, in particular when the wind turbine blade is attached to a wind turbine nacelle. Disclosure of Invention The above-mentioned task is solved by a positioning system for positioning at least one machine tool along an inner surface of a blade root section of a wind turbine blade, comprising at least one trolley, at least one rail element for guiding the trolley at least partly along the inner surface, and at least one tool carrier for carrying the machine tool, wherein the trolley is movably mounted on the rail element such that the trolley is at least partly movable along the rail element, and wherein the tool carrier is rigidly mounted on the trolley such that the tool carrier is movable along the rail element by moving the trolley. In other words, the positioning system according to the invention is intended to position at least one mechanical tool along the inner surface of the blade root section of the wind turbine blade. The positioning system comprises at least one, preferably exactly one trolley, at least one rail element, and at least one, preferably exactly one tool carrier. The rail element is designed to guide the trolley at least partly along a movement path defined by the rail element, which allows guiding the trolley at least partly along an inner surface of a blade root section of the wind turbine. The trolley is designed to be mountable on said rail element such that the trolley is movable at least partly along said rail element or along said movement path defined by the rail element. Furthermore, the tool carrier may be rigidly mounted on the trolley such that or on the trolley such that movement of the