Method and system for calculating mechanical properties of main bearing of wind turbine generator and medium
A technology of bearing mechanics and wind turbines, applied in electrical digital data processing, design optimization/simulation, instruments, etc., can solve the problems of restricting the design and development cycle of wind turbines, low efficiency of transmission chain cost reduction, and inability to start, to achieve lean The design and calculation speed are fast, and the effect of quick selection can be realized
Pending Publication Date: 2021-05-28
CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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However, the calibration method has always been mastered by the bearing supplier and is not disclosed to the public. The complete machine manufacturer has very little data, which largely restricts the design and development cycle of the wind turbine. Insufficient understanding also leads to inefficiency in cost reduction of the transmission chain, and even makes it impossible to start
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[0056] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0057] Such as Figure 1 to Figure 5 As shown, the calculation method of the wind turbine main bearing mechanical characteristics of the present invention comprises steps:
[0058] S01. According to the load of the wind wheel, the layout parameters of the transmission chain, and the elevation angle α, the weight of the main shaft M s , gearbox weight M g , solve the axial load F acting on the main bearing a and radial load F r ;
[0059] S02, with axial load F a and radial load F r As the input quantity, analyze the displacement of the inner ring of the main bearing and the rolling elements, calculate the expression of the elastic approach value δ of the rolling elements, and establish the balance equation of the inner ring;
[0060] S03. Simulate the contact between the ferrule and the rolling element, establish the contact load Q of th...
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The invention discloses a method and a system for calculating the mechanical properties of the main bearing of a wind turbine generator. The method comprises the steps: solving an axial load Fa and a radial load Fr which act on a main bearing according to a wind wheel load, a transmission chain layout parameter, an elevation angle alpha, a main shaft weight Ms and a gearbox weight Mg; adopting the axial load Fa and the radial load Fr as input variables, analyzing the displacement of the inner ring of the main bearing and the displacement of the rolling body, calculating the expression of the elastic approaching amount delta of the rolling body, and establishing a balance equation of the inner ring; simulating the contact between the ferrule and the rolling body, and establishing an equation of the contact load Q of the rolling body, the elastic approaching quantity delta and the maximum contact stress ph; combining all the equations, and solving all parameters through an iteration method. According to the method, accurate solving of key mechanical characteristic parameters such as contact stress, contact load, contact angle and service life of the main bearing of the wind turbine generator can be achieved, quick model selection of the main bearing and lean design of a transmission chain are achieved, and meanwhile certain theoretical support is provided for design of the main bearing.
Description
technical field [0001] The invention mainly relates to the technical field of wind power generation, in particular to a calculation method, system and medium for the mechanical characteristics of a wind turbine main bearing. Background technique [0002] Wind power is a kind of pollution-free green energy. The development and utilization of wind energy and the vigorous development of wind power generation technology are of great significance for solving global energy and environmental pollution. In today's increasingly fierce competition in the wind power industry, complete machine products with different power levels, impeller diameters, and wind speed levels emerge in an endless stream, requiring complete machine manufacturers to quickly complete wind turbine iterations and optimize designs while ensuring cost optimization of the complete machine. In the 2MW+ double-fed unit, the main bearing is set to bear most of the non-torque loads (all thrust loads and most of the gra...
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Login to View More IPC IPC(8): G06F30/17G06F30/20G06F119/14
Inventor 杨剑飞李秀珍欧阳华欧惠宇杨家春高首聪王立鹏王靛谭斌周彦松
Owner CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST