Megawatt level wind power generation oar-changing bearing friction torque numeric control testing machine and test approach

Abstract

The invention provides a megawatt wind power generation adjustable blade bearing friction moment numerical control testing machine and a testing method. The tested bearing outer ring is fixed on the machine rack; a main axis is equipped, one end of the bearing inner ring is fixed on the bearing inner ring, the other end is equipped with a radial and axial loading mechanism, in which the radial and axial load cylinder are separately pressured, and is equipped with variable-frequency motor of torque sensor, the driving pinion is meshed with the tested bearing inner ring, which form the loading and transmission system. The testing machine is determined by force analysis and analog loading principle, which is reasonable and reliable, and has simple structure and small size. The closed-loop numerical control system, which is composed of an industrial computer, a hydraulic pressure control member, a hydro cylinder, a feedback element and other components, can realize overall monitor, data collection, analysis, process, and number and graph double output; the size, direction, variation period of the load are accurate, the curves of the load output and friction torque are intuitive, the testing process is highly automatic. And the invention can be matched with manual adjustment. The machine is shutdown automatically if any failure happens. The test provides data support for the bearing wind turbines, which assures that the machine can meet the test need after loading.

Description

(1) Technical field: [0001] The invention relates to a large-capacity wind power generation variable pitch bearing friction torque testing machine and a testing method, belonging to the category of torque testing (G01L) and the testing category of structural components (G01M). (two) background technology: [0002] As a clean and renewable energy project, wind power generation is one of the 16 major technical projects that the State Council has focused on developing. The pitch bearing of a wind turbine is an important component of a wind turbine, requiring a large load-bearing capacity, high reliability, and a test life. As long as 20 years, and its installation and maintenance conditions are very harsh (more than 100 meters above sea level). The state-approved project of pitch bearings for wind power generators must replace imports at home, and reverse the situation of relying on imports. Many domestic bearing suppliers have set up projects to develop pitch bearings for wind...

AI Technical Summary

Problems solved by technology

However, the performance and reliability of the bearings are mostly tested directly on the wind turbines, which will result in great costs and potential risks.

A domestic manufacturer has trial-produced a 1.5M pitch bearing testing machine for wind power generation, but its structure is complex, its size is too long, it occupies too much land, and it takes more than four hours to disassemble and assemble, and it is mainly based on mechanical testing. Inconvenient, and the accuracy of the test results needs to be considered

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