CN-121993367-A - Method, device, equipment and medium for correcting staggered holes of flange of wind turbine generator

CN121993367ACN 121993367 ACN121993367 ACN 121993367ACN-121993367-A

Abstract

The application discloses a method, a device, equipment and a medium for correcting staggered holes of a flange of a wind turbine, and belongs to the technical field of wind power. The method for correcting the staggered holes of the flange of the wind turbine comprises the steps of disassembling individual bolts in a plurality of bolts connecting the hub flange and the rotating shaft flange under the condition that the wind turbine is stopped and the impeller is locked, determining the staggered hole directions of the hub flange and the rotating shaft flange according to screw holes corresponding to the disassembled bolts, disassembling the remaining bolts connecting the hub flange and the rotating shaft flange, applying preset fastening torque to fasten, and controlling the impeller to rotate in a target direction corresponding to the staggered hole directions under the acting force of wind until the staggered hole distances of the hub flange and the rotating shaft flange and the screw holes corresponding to the disassembled bolts are smaller than the preset error distance. According to the embodiment of the application, the safety of the wind turbine can be improved.

Inventors

LI ZHIWEI
GUO XIAOJUN
LIU YANG

Assignees

北京金风慧能技术有限公司
江苏金风软件技术有限公司

Dates

Publication Date: 20260508
Application Date: 20241105

Claims (10)

1. The method is characterized by being applied to the wind turbine, wherein the wind turbine comprises an impeller and a rotating shaft of a generator, and a hub of the impeller is fixedly connected with the rotating shaft through a hub flange, a rotating shaft flange and bolts; The method comprises the following steps: Under the condition that the wind turbine generator is stopped and the impeller is locked, disassembling individual bolts in a plurality of bolts connecting the hub flange and the rotating shaft flange, and determining the staggered hole directions of the hub flange and the rotating shaft flange according to screw holes corresponding to the disassembled bolts; Loosening the residual bolts connecting the hub flange and the rotating shaft flange, and applying a preset fastening torque to fasten; and controlling the impeller to rotate in a target direction corresponding to the staggered hole direction under the acting force of wind until the staggered hole distance between the hub flange and the screw hole corresponding to the rotary shaft flange and the detached bolt is smaller than a preset error distance.
2. The method of claim 1, wherein the misalignment direction comprises a first direction and a second direction; the axis of the screw hole of the rotating shaft flange is higher than the axis of the screw hole of the hub flange in the direction of the tower of the wind turbine generator; and the second direction represents that the axis of the screw hole of the hub flange is higher than the axis of the screw hole of the rotating shaft flange in the direction of the tower of the wind turbine generator.
3. The method of claim 2, wherein the step of determining the position of the substrate comprises, When the staggered hole direction is the first direction, the target direction is a clockwise direction taking the direction of the rotating shaft flange pointing to the hub flange as an axis; And under the condition that the staggered hole direction is the second direction, the target direction is a counterclockwise direction taking the direction of the rotating shaft flange pointing to the hub flange as an axis.
4. The method of claim 1, wherein said controlling the impeller to rotate under the force of the wind in a target direction corresponding to the direction of the misconnection comprises: determining the target direction corresponding to the staggered hole direction according to the staggered hole direction; And acquiring wind direction information of the wind turbine, unlocking the impeller according to the wind direction information, controlling the impeller to yaw to reach a target yaw position, and enabling the impeller to rotate according to the target direction under the action of wind of the wind direction represented by the wind direction information.
5. The method of claim 1, further comprising, prior to said controlling said impeller to rotate under force of wind in a target direction corresponding to said staggered hole direction: Along the direction of pivot flange orientation wheel hub flange inserts the guide stick in the screw that the bolt that is dismantled corresponds, guide the stick including straight body structure and the italic structure of connection, along the length direction of guide stick, the diameter of the cross-section of italic structure reduces gradually, the part of italic structure inserts wheel hub flange's screw makes the italic structure with the minimum distance of wheel hub flange's screw hole wall is less than or equal to the preset distance.
6. The method of claim 5, wherein controlling the impeller to rotate in a target direction corresponding to the misalignment direction under the force of wind until the misalignment distance between the hub flange and the spindle flange and the screw hole corresponding to the detached bolt is less than a preset error distance, comprises: according to the staggered hole direction, controlling the impeller to rotate for a preset time period according to the target direction under the acting force of wind; If the minimum distance between the oblique structure and the hole wall of the screw hole of the hub flange is larger than the preset distance, the impact force is applied to the guide rod along the direction of the rotating shaft flange pointing to the hub flange, so that the minimum distance between the oblique structure and the hole wall of the screw hole of the hub flange is smaller than or equal to the preset distance; and controlling the impeller to rotate for a preset time period according to the target direction under the acting force of wind again until the straight structure stretches into the screw hole of the hub flange.
7. The method of claim 1, wherein the remaining bolts connecting the hub flange and the spindle flange are divided into N bolt groups, each bolt group including at least one remaining bolt, and the bolts in each bolt group being spaced apart on the hub flange and the spindle flange, N being an integer greater than 1; The hub flange is connected with the rotating shaft flange, the residual bolts are loosened, and a preset fastening torque is applied to fasten the hub flange and the rotating shaft flange, and the hub flange comprises: And disassembling and loosening the residual bolts connecting the hub flange and the rotating shaft flange for N times, and applying a preset fastening moment to disassemble and fasten one bolt group at a time.
8. The staggered hole correcting device for the flange of the wind turbine generator is characterized by being applied to the wind turbine generator, wherein the wind turbine generator comprises an impeller and a rotating shaft of a generator, and a hub of the impeller is fixedly connected with the rotating shaft through a hub flange, a rotating shaft flange and bolts; The device comprises: The staggered hole direction determining module is used for disassembling individual bolts in a plurality of bolts for connecting the hub flange and the rotating shaft flange under the condition that the wind turbine generator is stopped and the impeller is locked, and determining the staggered hole directions of the hub flange and the rotating shaft flange according to screw holes corresponding to the disassembled bolts; the bolt processing module is used for loosening the residual bolts connecting the hub flange and the rotating shaft flange and then applying a preset fastening torque to fasten; and the impeller control module is used for controlling the impeller to rotate in a target direction corresponding to the staggered hole direction under the acting force of wind until the staggered hole distance between the hub flange and the screw hole corresponding to the rotary shaft flange and the detached bolt is smaller than a preset error distance.
9. The equipment for correcting the staggered holes of the flange of the wind turbine generator is characterized by comprising a processor and a memory storing computer program instructions; The processor, when executing the computer program instructions, implements a method for correcting a misalignment of a flange of a wind turbine according to any one of claims 1 to 7.
10. A computer readable storage medium, characterized in that the computer readable storage medium has stored thereon computer program instructions, which when executed by a processor, implement a method of correcting a misalignment of a flange of a wind turbine according to any of claims 1 to 7.

Description

Method, device, equipment and medium for correcting staggered holes of flange of wind turbine generator Technical Field The application belongs to the technical field of wind power, and particularly relates to a method, a device, equipment and a medium for correcting staggered holes of a flange of a wind turbine generator. Background The wind turbine generator can comprise large parts such as an impeller, a transmission system structure, a generator, a gear box and the like, and the large parts in the wind turbine generator are connected through high-strength connecting bolts. The impeller is connected with a rotating shaft of the generator through a flange, wind blows the impeller to rotate, and the impeller drives the rotating shaft to rotate, so that the generator or the gear box is driven to rotate. In the installation process or the later operation process of the wind turbine generator, the flange of the hub in the impeller and the flange of the rotating shaft of the wind turbine generator can slide on the flange surface, so that the screw holes of the flange of the hub and the screw holes of the flange of the rotating shaft are staggered. After the wind turbine generator runs for a certain time under the condition of staggered holes, fatigue damage can occur to bolts in screw holes, fatigue fracture can occur after the fatigue damage exceeds the fatigue life of the bolts, and the wind turbine generator can also cause opening between the impeller and the flange of the rotating shaft, so that the safety of the wind turbine generator is seriously affected. Disclosure of Invention The embodiment of the application provides a method, a device, equipment and a medium for correcting staggered holes of a flange of a wind turbine, which can improve the safety of the wind turbine. In a first aspect, an embodiment of the present application provides a method for correcting a misalignment of a flange of a wind turbine, which is applied to a wind turbine, where the wind turbine includes an impeller and a rotating shaft of a generator, and a hub of the impeller is fixedly connected with the rotating shaft through a hub flange, a rotating shaft flange and a bolt; The method comprises the steps of disassembling individual bolts in a plurality of bolts connecting a hub flange and a rotating shaft flange under the condition that a wind turbine is stopped and an impeller is locked, determining the staggered hole direction of the hub flange and the rotating shaft flange according to screw holes corresponding to the disassembled bolts, disassembling the remaining bolts connecting the hub flange and the rotating shaft flange, applying a preset fastening moment to fasten, and controlling the impeller to rotate in a target direction corresponding to the staggered hole direction under the acting force of wind until the staggered hole distance between the hub flange and the rotating shaft flange and the screw holes corresponding to the disassembled bolts is smaller than the preset error distance. In some possible embodiments, the misalignment direction includes a first direction and a second direction, the first direction being indicative of an axis of the screw holes of the rotor flange being higher than an axis of the screw holes of the hub flange in a direction of the tower of the wind turbine, and the second direction being indicative of an axis of the screw holes of the hub flange being higher than an axis of the screw holes of the rotor flange in a direction of the tower of the wind turbine. In some possible embodiments, the target direction is a clockwise direction with the direction of the spindle flange pointing toward the hub flange as an axis in the case of the misalignment direction being a first direction, and the target direction is a counterclockwise direction with the direction of the spindle flange pointing toward the hub flange as an axis in the case of the misalignment direction being a second direction. In some possible embodiments, the impeller is controlled to rotate in a target direction corresponding to the staggered hole direction under the action of wind, and the method comprises the steps of determining the target direction corresponding to the staggered hole direction according to the staggered hole direction, acquiring wind direction information of a wind turbine generator, unlocking the impeller according to the wind direction information, controlling the impeller to yaw to a target yaw position, and enabling the impeller to rotate in the target direction under the action of wind of the wind direction represented by the wind direction information. In some possible embodiments, before the impeller is controlled to rotate in the target direction corresponding to the staggered hole direction under the action of wind, the method further comprises the steps of pointing the rotating shaft flange to the direction of the hub flange, inserting a guide rod into a screw hole corresponding to the detached bol