Wind power generation unit and blade deicing system thereof

Abstract

The invention discloses a blade deicing system of a wind power generation unit. The blade deicing system comprises an air heating and outputting device arranged at the top end of a tower drum of the wind power generation unit, a multi-through connector arranged in a hub of the wind power generation unit and blade ventilation pipelines arranged in corresponding blades of the wind power generation unit; an air outlet of the air heating and outputting device communicates with one port of the multi-through connector through a rotary connector; and the other joints of the multi-through connector communicate with tail ends of the corresponding blade ventilation pipelines. By adopting the blade deicing system provided by the invention, the risk of mounting dropping is avoided, fatigue load of a relative component of a fan is reduced, the reliability is improved, and the service life of the component is prolonged; without arranging a hub sliding ring, the cost is remarkably lowered; the heating efficiency is improved, and in addition, as the fan can work both when stopping and running, the cost is low; and the risk of damage by lightning is avoided, the reliability is high, and the maintenance cost is low. The invention also discloses the wind power generation unit comprising the blade deicing system.

Description

technical field [0001] The invention relates to the field of wind power generation, in particular to a blade deicing system of a wind power generating set. In addition, the present invention also relates to a wind power generating set comprising the above-mentioned blade deicing system. Background technique [0002] With the gradual depletion of global fossil energy and the deterioration of climate problems, wind power as a clean energy is expected to improve this situation. With the advancement of technology, wind power has gradually become prominent in the proportion of energy structure. Wind power generation operates in cold weather conditions, and the blades of the fan are prone to ice formation, which will damage the original aerodynamic characteristics of the blades, reduce the power output, and be forced to shut down in serious cases, thereby reducing the power generation of the unit. When the blades freeze, it will increase the additional load of the unit, and long-...

AI Technical Summary

Problems solved by technology

[0005] However, the existing electrothermal deicing technology for fan blades has the risk of lightning strikes, the reliability of the solution is low, and expensive maintenance costs may be required later

In the existing gas-thermal deicing technology for fan blades, the power supply of the heater must pass through the hub slip ring. Because the power of the heater is relatively large, the total power of the general heating system exceeds 80 kW, or even reaches more than 200 kW, which will make the hub slip ring in the original state. The power is doubled on the basis of the design, and the cost is relatively high, especially for the technical transformation of the fan in service, it is necessary to replace a new hub slip ring, which is expensive

[0006] At the same time, in the existing gas-thermal deicing technology for fan blades, the heating device (mainly refers to the heater and blower, a complete set of about 600 kg) is installed in the impeller rotation mechanism, which has the risk of falling off and will increase the overall load of the fan, especially the fan. Blade fatigue load and pitch bearing load affect the overall service life of the fan

If the airtight space of multiple blades is heated at the same time, three heating systems are required, and the cost is high. However, if one heating system is used, the three blades cannot be heated at the same time, and dynamic deicing when the fan is running cannot be achieved.

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