Method for allowing for using maximum load of rolling body to set static load bearing curve of blade bearing

Abstract

The invention provides a method for allowing for using the maximum load of a rolling body to set a static load bearing curve of a blade bearing. The method comprises the following steps of: according to a hertz contact theory, obtaining an allowable maximum load [Qmax] of the rolling body, substituting the [Qmax] to obtain the axial load Fa allowed of the blade bearing and the static load computing formula M allowed of the capsizing moment; under a principle of selecting minimum values, determining the value of the epsilon 1 or the epsilon 2, and making the value meet two parallel conditions: 1, when the epsilon 1 is less than 1, the summation of the epsilon 1 and the epsilon 2 is equal to 1, and the epsilon 1 is more than or equal to the epsilon 2; and 2, when the epsilon 1 is more than or equal to 1, the epsilon 2 is equal to 0; calculating the Fa allowed value and the M allowed value according to the values of the epsilon 1 and the epsilon 2; and setting the static load bearing curve of the blade bearing by taking the axial dynamic load Fa allowed as the horizontal coordinate and the capsizing moment dynamic load M allowed as the vertical coordinate. By the use method for setting the static load bearing curve of the blade bearing according to the allowed maximum load of the rolling body, whether the lectotype of the blade bearing meets the use requirement can be validated, and the method can also be used as a reference for optimizing the design parameters of the blade bearing.

Description

technical field [0001] The invention belongs to the technical field of wind power bearing design, and in particular relates to a method for setting a static load bearing curve of a pitch bearing with a maximum allowable rolling body load. Background technique [0002] Since entering the 21st century, the problems of energy shortage and environmental degradation have become increasingly prominent worldwide. As a green, environmentally friendly and clean renewable energy utilization method, wind power has been paid more and more attention by governments of various countries. Some developed countries in Europe and the United States have a long history of using wind energy for power generation, and the wind power generation technology is very mature; at present, the power of mainstream foreign wind turbines is at the megawatt level, and the maximum has reached 7 megawatts. [0003] In recent years, my country has begun to introduce foreign large and medium-sized wind power gene...

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Problems solved by technology

[0006] Most of the pitch bearing manufacturers in my country cannot provide bearing load curves, and a few companies use the load curves of slewing bearings for construction machinery with similar structures as the basis for pitch bearing selection. This type of static load curve is composed of straight lines and cannot Truly reflect the static load carrying capacity of the pitch bearing

[0007] As for the static load bearing curve of the double-row four-point contact ball structure type slewing bearing such as the pitch bearing, there is no relevant report in China.

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