Device for monitoring running state of wind generator tower

Abstract

The invention relates to a device for monitoring running state of a wind generator tower, which comprises a sensor group of a vibration or / and steady-state acceleration detection sensor and a forced direction detection sensor, and a failure information processor. The sensor group comprises an acceleration sensor making the tower integrally vibrate in the north and south directions, and an acceleration sensor making the tower integrally vibrate in the east and west directions which are arranged on the upper layer of the tower according to geographical coordinates, an acceleration sensor making the sensitive tower show torsional vibration around a symmetric centre O of the tower, and a sensor J for detecting the Y direction of external action opposite to the east and west directions of the tower and using east as reference polar coordinates; the sensors sensitive to the east and west, north and south transverse vibration and the sensor sensitive to the torsional vibration are arranged in equal distance with the symmetric centre O of the tower; a sensitive shaft of the sensor sensitive to the north and south vibration points to the north, and a sensitive shaft of the sensor sensitive to the east and west vibration points to the east; the sensor sensitive to the north and south vibration and the sensor sensitive to the torsional vibration are arranged at the same position, and the sensor sensitive to the east and west vibration and the sensor sensitive to the torsional vibration are arranged at the same position; and the distance from the sensor mounting position pointed by a sensitive shaft of the sensor sensitive to the torsional vibration to the symmetric centre of the tower is in the anticlockwise tangential direction of a circle of which radius is R, and the distance from the sensor mounting position pointed by a sensitive shaft of another sensor sensitive to the torsional vibration to the symmetric centre of the tower is in the clockwise tangential direction of.

Description

technical field [0001] The invention relates to a mechanical tower fault diagnosis technology, especially a wind power generator tower operating state monitoring device, which belongs to the category of mechanical fault detection and diagnosis technology, and is mainly used for online detection with vibration and steady-state acceleration detection and analysis technology 1. Diagnose the fault of the tower of wind power generation. technical background [0002] Tower structures are often used in existing buildings, industries, and power facilities. Most towers do not have fault detection devices, but employ what are believed to be sufficiently conservative design codes to ensure safety. As a result, not only accidents occur from time to time, such as wind turbines being damaged due to operating resonance, but also due to the lack of cognitive means for the relationship between these facilities and the environment, it is difficult to put forward pertinent design requirements...

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Problems solved by technology

[0004] But, according to the research of the present inventor to the running state of the wind-driven generator: the operation of the wind-driven generator is except being closely related to the state of its own mechanical structure, and is also affected by the wind force, wind direction, wind speed and the surrounding environment in the environment, and more due to The wind blades of the wind turbine have a large turning radius, so there will be more unpredictable factors affecting the normal operation of the tower and the generator set

For example: In addition to the wind force parallel to the rotor axis and the unbalanced force parallel to the plane of the impeller, the tower of the wind turbine will also be affected by the lateral force of the left and right sides with different wind forces. The torsional shear force formed under the action of force may be more destructive to the tower and wind turbine components, and if only the acceleration sensor that detects the acceleration parallel to the main axis and the transverse direction is used, either because the sensor is installed on the tower to rotate The center of symmetry of the tower cannot be sensitive to torsional vibration, or because the sensor is not installed at the symmetry center of the tower rotation, the torsional vibration is mistaken for lateral vibration, which brings decision errors to correct monitoring; except for the above-mentioned parallel to the rotation axis and vertical In addition to the lateral vibration of the rotating shaft, there are also vibrations that are different from the two directions parallel to the rotating shaft and perpendicular to the rotating shaft under the action of the above-mentioned wind force due to factors such as loosening of the fixed tower foundation; even because of the use of vibration Sensors other than those capable of monitoring steady-state acceleration are unable to identify tower tilt and its orientation state

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