Cooling system used for shaft system of wind generating set and wind generating set

Abstract

The invention provides a cooling system used for a shaft system of a wind generating set and the wind generating set. The cooling system comprises an annular radiating assembly fixedly installed on the inner surface of a rotating shaft, a cooling medium transmission assembly fixedly bonded with the annular radiating assembly, a fluid sliding ring assembly fixed to a fixed shaft and a condenser fixed to a part, except for the shaft system, of the wind generating set, and the cooling medium transmission assembly is connected with the condenser through the fluid sliding ring assembly to form a refrigerating cycle loop for dissipating heat transmitted from the shaft system to the annular radiating assembly. The cooling system is additionally arranged after the wind generating set is designed and completed, running of other components in the wind generating set is not influenced, implementation is simple, and installation is reliable; and in addition, a fluid sliding ring is arranged between a dynamic part and a static part, fluid communication between the dynamic part and the static part is achieved, and circulation of the cooling system is achieved.

Description

technical field [0001] The invention relates to the field of wind power generation, in particular to a cooling system for a shaft system of a wind power generating set. Background technique [0002] Most wind turbines use permanent magnet direct drive wind turbines, such as figure 1 (Schematic diagram of the structure of a wind turbine) and figure 2 ( figure 1 As shown in the sectional view of part A of ), the wind turbine with permanent magnet direct drive wind generator mainly includes: blade 1, hub 2, generator subsystem 3, nacelle 4 and tower 5. The generator subsystem 3 mainly includes: a permanent magnet direct drive wind turbine 6, a fixed shaft 7, a rotating shaft 9, and a main bearing. The main bearing includes a bearing inner ring 10, a bearing roller 8 and a bearing outer ring 11. The bearing inner ring 10 is connected to the rotating shaft 9, and the bearing outer ring 11 is connected to the fixed shaft 7. Since the blade 1 and the wheel hub 2 are connected t...

AI Technical Summary

Problems solved by technology

Moreover, many failure forms of bearings are all caused by "heat" in the final analysis, and, with the gradual increase of wind turbine power generation, heat dissipation problems not only affect the life of grease, but also cause damage to other components of wind turbines. Threats (e.g., internal components that may melt due to high temperatures) are of increasing concern

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