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Method for establishing statics model of extra-large double-row four-point contact ball bearing

A static model, four-point contact technology, applied in special data processing applications, instruments, electrical digital data processing, etc., to achieve the effect of accurate bearing load distribution

Active Publication Date: 2014-07-23
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

None of the above formulas consider the influence of the original clearance of the bearing, and are only suitable for bearings with zero clearance. For bearings with positive clearance and negative clearance, the above formula is wrong

Method used

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  • Method for establishing statics model of extra-large double-row four-point contact ball bearing
  • Method for establishing statics model of extra-large double-row four-point contact ball bearing
  • Method for establishing statics model of extra-large double-row four-point contact ball bearing

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Experimental program
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Effect test

Embodiment Construction

[0040] The structural parameters, material parameters and load conditions of a certain type of extra-large double-row four-point contact ball bearing are known as follows:

[0041] d m =2215mm, D W =44.45mm, α 0 =45°, d c =69mm, r i = r e =23.34mm, Z =128×2, v =0.3, E =207 GP a , F a =250 kN , F r =130 kN , M =1800 kN m

[0042] The specific establishment process of the static model of the pitch bearing is as follows:

[0043] Step 1. Establishment of geometric model

[0044] Under the premise of given structural parameters, material parameters and load parameters of the pitch bearing, before the bearing is loaded, the formula for the distance between the centers of curvature of the inner and outer ring grooves of any contact pair of rolling elements is:

[0045]After the bearing is loaded, the formula for the distance between the curvature centers of the inner and outer ring grooves of four contact pairs at any rolling element position becomes:...

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Abstract

The invention discloses a method for establishing a static model of an extra-large double-row four-point contact ball bearing, and the method comprises the following steps of: under a precondition of setting a structure parameter, a material parameter and a load parameter, establishing a geometric model; taking an influence of an bearing running clearance into consideration of the geometric model; depending on a phenomenon that an inner ring is under a balance state under an action of an external load and loads of all rolling bodies, determining a mechanics equilibrium equation of the inner ring; introducing the structure parameter, the material parameter and a load situation of the known bearing into the mechanics equilibrium equation, and calculating displacements sigma a, sigma r and theta of a bearing inner ring, thereby obtaining total elastic contact deformation delta iphi of a steel ball and a raceway as well as a normal contact load Q iphi of a contact pair i on a position angle phi, and obtaining contact load distribution of the bearing on various position angles; changing a bearing running clearance value, and drawing a contact load distribution chart of the bearing in various running clearances. Through a scheme design, the double-row four-point contact ball bearing is more precise; moreover, design accuracy of a service life of the bearing is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of wind power bearing design, and in particular relates to a method for establishing a static model of an extra-large double-row four-point contact ball bearing considering clearance Background technique [0002] Extra-large double-row four-point contact ball bearings are mainly used in the pitch system of wind power generation equipment. The pitch bearings are generally installed at a height of 40-60m, and the installation and replacement are extremely inconvenient and costly. Therefore, the pitch bearing is required to have a service life of 20 years and high reliability. The pitch bearing bears a large impact load, so it is generally required to have zero clearance or negative clearance to reduce the fretting wear of the rolling working surface. The size of the negative clearance of the pitch bearing not only affects the assembly, the starting torque of the bearing, the rotation accuracy and the support ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 王燕霜袁倩倩曹佳伟李璞李燕
Owner QILU UNIV OF TECH
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