Blade dynamic balance evaluation method, device and system

A blade and blade angle technology, applied in the field of wind turbine evaluation, can solve problems such as difficulty in accurately extracting the dynamic imbalance of wind turbines, and achieve the effect of ensuring safety and reliability and reducing the process of manual intervention.
CN109653963BActive Publication Date: 2020-07-28SANY ELECTRIC CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
SANY ELECTRIC CO LTD
Publication Date
2020-07-28

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Abstract

The invention provides a blade dynamic balance assessment method, device and system and relates to the technical field of fan assessment. The method comprises the steps that the distance parameter ofeach blade of a fan and a fan tower cylinder in the operation process of the fan is obtained; a section curve of one side, close to the tower cylinder, of each blade in the operation process of the fan is drawn according to the rotating speed of the fan and the distance parameter; based on the section curve, the angle parameter of each blade and the deformation amount of each blade in the operation process of the fan are calculated; and according to the angle parameter and the deformation amount, the dynamic balance assessment index in the operation process of the fan is calculated, and therefore the dynamic balance state of the blades of the fan can be assessed. According to the blade dynamic balance assessment method, device and system, in the assessment process, by means of the manner of measuring the distance parameter in a non-contact manner, manual intervention can be reduced effectively, thus the dynamic balance situation of the fan can be effectively assessed and monitored, thedynamic balance of the fan is controlled within the safety range, and safety and reliability of fan operation are ensured.
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Description

technical field

[0001] The invention relates to the technical field of fan evaluation, in particular to a blade dynamic balance evaluation method, device and system. Background technique

[0002] With the rapid development of my country's wind power generator industry, the stock of domestic wind power generators is increasing. After the fan has been running for a long time, the initial zero position of the blade will deviate from the correct zero position of the design due to various reasons. The inconsistencies in the pitch angles between the blades lead to differences in the efficiency of wind energy captured by the blades of the fan and the wind load brought by them, thus causing the aerodynamic imbalance of the fan. At the same time, because the quality and stiffness of the blades are inconsistent, it will also lead to mass imbalance or aerodynamic imbalance of the fan.

[0003] The dynamic imbalance of the fan often causes problems such as abnormal vibration of the fa...

Claims

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