Deformation test device for connection between wind turbine tower and foundation and application thereof

Abstract

The invention discloses a deformation testing device for connecting a wind power generator tower to a foundation and its application. The device includes a fully temperature-compensated and high-precision inclination sensor and a data acquisition module; the inclination sensor is connected to the data acquisition module; when the foundation is land For the fan foundation, in the height direction, the inclination sensor is installed at h from the top surface of the foundation, h is less than 2m, and the x and y axes of the inclination sensor are respectively parallel to the radial direction and tangential direction of the tower tube of the foundation connection section; when the foundation is When the offshore wind turbine is built, the inclination sensor is fixed above the sea surface. The testing accuracy and reliability of the deformation testing device of the present invention are significantly improved; the application of the deformation testing device for connection between the wind turbine tower and the foundation during the construction period and service period is provided; a high-precision safety monitoring index for the connection section of the wind turbine foundation is determined, which is The safety evaluation of the structure provides a basis; the test and analysis scheme is simple, the performance is more stable, the installation is simple, and the investment is saved.

Description

technical field [0001] The invention belongs to the fields of wind power generation and new energy, and in particular relates to a deformation testing device for connecting a wind power generator tower to a foundation and its application. Background technique [0002] A wind turbine (hereinafter referred to as a fan) is mainly composed of a nacelle, blades, tower, foundation, etc., wherein the nacelle and blades are located on the top of the tower. For onshore wind power, the foundation ring connection or anchor bolt connection is used between the wind turbine tower and the foundation. For offshore wind power, the foundation ring connection, flange bolt connection or grouting sleeve connection is used for the wind turbine tower and foundation. The segments of the base connection are collectively referred to as the base connection segment. In the process of wind turbine foundation construction, it is necessary to accurately adjust the connection section of the installation f...

AI Technical Summary

Problems solved by technology

[0004] The current fan monitoring method based on the inclination sensor (or inclination acceleration sensor group) has the following problems: 1) The sensor is installed on the upper middle and top of the tower, which is seriously disturbed by the vibration of the fan and introduces noise, although some tests use filtering and other methods to filter High-frequency signals are dropped, but this processing significantly reduces the test accuracy and sensitivity, and the identification sensitivity to tower and foundation defects is low

2) The sensor type selection and technical indicators are not clear, the number and types of sensors arranged are many, and the field test system layout is complicated and cumbersome

3) The connection between the wind turbine tower and the foundation is crucial to the bearing capacity of the structural system, but the detection of this important part is blank in the existing technology

4) For the detection or monitoring of the foundation connection section of the fan, there is a lack of a set of testing methods and a method for determining safety monitoring indicators

[0005] To sum up, the foundation connection section of the wind turbine is very important for the safety of the wind turbine structure, and there is currently a lack of effective testing devices and monitoring methods

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