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Cylindrical roller multi-circular-arc variable curvature profile engineering simulation method

A technology of cylindrical roller and simulation method, applied in the field of crown design of cylindrical roller, roller, tapered roller, inner and outer ring raceway, to overcome the boundary stress concentration effect and reduce the processing and manufacturing cost.

Inactive Publication Date: 2012-08-22
BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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Problems solved by technology

[0009] In summary, so far there is no complete algorithm description and specific implementation technology for the roller convex shape using multi-arc variable curvature combination simulation to replace the logarithmic convex shape

Method used

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  • Cylindrical roller multi-circular-arc variable curvature profile engineering simulation method
  • Cylindrical roller multi-circular-arc variable curvature profile engineering simulation method
  • Cylindrical roller multi-circular-arc variable curvature profile engineering simulation method

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Embodiment Construction

[0033] Such as figure 1 , figure 2 As shown in , an engineering simulation method of multi-arc variable curvature convex shape of cylindrical rollers, firstly, the cylindrical rollers are divided into several interconnected arc slices along the axial direction, and then according to the given special logarithm Calculate the coordinates of the intersection points of the boundary lines of each slice using the curve, and then use the equations of the adjacent arc segments and the line connecting the two arc segments to solve the arc center coordinates and arc radius values ​​of each segment; based on the theory of contact mechanics, calculate and analyze different numbers of variables Under the arc-convex curvature, the contact stress distribution along the axis of the roller is compared with the contact stress distribution of the theoretical logarithmic convex shape, so as to optimize the number of arcs with variable curvature.

[0034] Such as Figure 5 , Figure 6 As shown...

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Abstract

The invention relates to a cylindrical roller multi-circular-arc variable curvature profile engineering simulation method. In the method, a cylindrical roller is divided along the axial line direction into plural circular arc sections connected with each other, the intersection point coordinate value of the boundary of each section is calculated according to a given special logarithmic curve, the radius value of each segment of circular arc is calculated by use of adjacent circular arc segments and line of centers of two circular arc segments, and contact stress distribution along the axial line direction of the roller is calculated and analyzed under the condition of different-number variable curvature circular arc profile based on the theory of contact mechanics, and compared with theoretical logarithmic profile contact stress distribution to therefore select an optimal number of proper variable curvature circular arcs. The invention adopts variable curvature multi-circular-arc combination simulation to substitute for theoretical logarithmic curve, realizes low manufacturing cost for variable curvature multi-circular-arc profile roller, overcomes the stress edge effect of a conventional straight generatrix shaped roller end part, provides a theoretical foundation for generalization of roller crowned design technology, and is applicable for crowned design of cylindrical roller and tapered roller as well as roller inner and outer rings.

Description

technical field [0001] The invention relates to an engineering simulation replacement method for the logarithmic convex shape of Lundberg theory by combining cylindrical rollers with multi-segment variable curvature arcs, which is applicable to cylindrical rollers, tapered rollers, and rollers, inner and outer ring raceways convexity design. Background technique [0002] Cylindrical roller bearings are widely used in various machinery and equipment in oil and gas drilling, railway locomotives, shipping, automobiles, metallurgical mines and other industries. Studies have shown that for cylindrical roller bearings, ordinary straight generatrix rollers will inevitably produce boundary stress concentration at both ends of the rolling elements after loading, which is the so-called "edge effect", which greatly reduces the contact fatigue of the bearing life. [0003] The primary way to extend the life of rolling bearing contact fatigue is to try to reduce the maximum contact str...

Claims

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Application Information

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IPC IPC(8): F16C33/34
Inventor 张洪伟陈家庆张向东
Owner BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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