Goldwind - Xinjiang
Case Study Goldwind - Xinjiang

Large-Volume Hand-Held Probing Guarantees Dimensional Integrity of Rotor Blade Hubs for Wind Turbines

Globally, wind power generation increased more than fivefold since the year 2000. With the global trend toward limiting CO2 emissions and numerous governmental programs subsidizing or financing wind power generation, its share of global power generation is set to experience substantial growth in the foreseeable future.

China is rich in wind energy, with about 1,000 gigawatts of potentially exploitable wind energy. This energy potential is distributed across the southeast coastal areas, adjacent islands, Inner Mongolia, Xinjiang, the Gansu Hexi Corridor, Huabei and the Qinghai-Tibetan Plateau. In order to encourage technical innovation, market expansion and commercialization, development targets have been established, concession projects offered, and policies introduced to encourage domestic production.

Three-dimensional measurement and analysis of rotor blade hubs and their production facility are highly complex and demanding measuring tasks. Such measurements can be successfully dealt with only by using modern measuring systems and a well-prepared measurement strategy.

Transferring the rotors energy efficiently to the main bearing and withstanding the enormous windload constantly, brings another critical part into focus, the main hub. The hub connects the three blades to form the rotor and is holding, depending on the model of wind power generator, the motorized pitch mechanism for each blade. The rotor itself is joint to the slowly rotating shaft or main bearing with another flange, thus forming a rigid horizontal rotation-axis into the nacelles gear box. Diameter, flatness and orientation of each flange of the hub are subject to precise quality inspections. Leica T-Probe, the walkaround-CMM, perfectly matches to the need of accuracy and ease of use. Connected to a state of the art metrology software Metrolog XG for Leica this one-man operated probing device enables Goldwind Science and Technology to quickly inspect and document the machined part as-build directly on the shop floor . . . . .

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