Control method for automatic lubrication system of pitch bearing for wind turbine

Abstract

The invention provides a control method for an automatic lubrication system of a pitch bearing for a wind turbine, which comprises the following steps: working out the current friction factor of the pitch bearing by the current friction torque of the pitch bearing for the wind turbine; solving out the quantity demanded of lubrication grease by taking the to-be-reached friction factor of the pitch bearing as the target according to the operating power of the wind turbine and the current friction factor of the pitch bearing; generating a lubricating control strategy by taking the predetermined generated energy of the wind turbine as the target according to the quantity demanded of the lubrication grease; calculating a to-be-lubricated target area according to average air speed and blower power, wherein the to-be-lubricated target area is the working area of the tooth surface of the pitch bearing; simultaneously, calculating an angle difference between the oil outlet point of a lubricating pinion and the to-be-lubricated target area; and controlling a pitch system actuating mechanism to shift the angle difference by a main controller of the wind turbine, and performing automatic lubrication according to the control strategy. By adopting the control method for the automatic lubricating system of the pitch bearing for the wind turbine, the pitch bearing and the pitch tooth surface are well lubricated.

Description

technical field [0001] The invention relates to a control method, in particular to a control method for an automatic lubrication system of a pitch bearing used in a wind turbine. Background technique [0002] The lubricating device equipped with wind turbines can lubricate each key component during operation, ensuring the service life of key components and reducing the amount of manual maintenance operations for wind turbines. For the pitch bearing lubrication system, due to the characteristics of the pitch bearing equipment and the special working conditions of the comparison system, a reliable lubrication system is needed to achieve double lubrication for the pitch bearing and the open tooth surface. [0003] The lubrication of the pitch bearing of the wind turbine includes two main aspects: 1. The lubrication of the raceway is realized inside the pitch bearing, referred to as the pitch bearing lubrication; 2. The contact between the pitch bearing and the output shaft of t...

AI Technical Summary

Problems solved by technology

[0014] According to the operation characteristics of the wind turbine pitch bearing and the operation modes of the above two schemes, the following two deficiencies can be summarized: 1. The deficiencies of the manual working mode; 2. The deficiencies of the timing and quantitative working mode

But considering the above shortcomings, the oil outlet point of the lubricating pinion cannot lubricate the working area. On the contrary, too much grease is in an unprotected state. After excessive accumulation, the rotation of the hub will cause the grease to be thrown out, causing the hub Pollution from other equipment, especially the pitch controller and energy storage battery system

[0024] The above analysis shows that the automatic lubrication control system with timing and quantitative oil injection as the control method cannot meet the lubrication requirements of the wind turbine pitch bearings, and may cause oil pollution to other equipment, which increases the maintenance workload for maintenance personnel and wastes lots of lube

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