Bionic variable-structure cone spiral groove bearing

Abstract

The invention discloses a bionic variable-structure cone spiral groove bearing comprising a bearing main shaft and a bearing pedestal. The end, matched with the bearing pedestal, of the bearing main shaft is a cone. Multiple variable-structure spiral grooves are formed in the conical face close to the large end face side of the cone. The space between the bearing pedestal and the bearing main shaft is full filled with a lubricating agent. The multiple variable-structure spiral grooves are variable-groove-depth spiral grooves or variable-spiral-angle spiral grooves or variable-groove-width spiral grooves or a combination with the spiral groove depth, the spiral angle and the spiral groove width each linearly changing. By means of the special distribution rule of the spiral grooves, dynamic pressure lubrication and hydrostatic lubrication both exist when the bearing works, the fluid lubrication performance is improved, the lubrication effect is enhanced, and the problems that a traditional cone spiral groove bearing is poor in dynamic pressure lubrication performance, large in friction torque and severe in abrasion when the speed is low are solved. Direct contact of the bearing main shaft and the bearing pedestal during work is reduced, precision can be kept for a long time, and the service life of the bearing is prolonged.

Description

technical field [0001] The invention relates to a conical spiral groove bearing, in particular to a bionic variable structure conical spiral groove bearing. Background technique [0002] Such as figure 1 As shown, the process of hydrodynamic lubrication of radial sliding bearings is described, where h represents the minimum oil film thickness, ω is the rotational speed of the shaft diameter, and F is the radial load on the shaft diameter. Such as figure 1 As shown in (a), it is the relative position between the shaft diameter and the shaft hole when the shaft diameter is stationary. At this time, a convergent wedge-shaped space is naturally formed between the outer surface of the shaft diameter and the inner surface of the shaft hole (minimum oil film thickness h=0) ; When the shaft diameter starts to rotate, the speed is low, and the amount of oil brought into the bearing gap is small. At this time, the direction of the friction force of the shaft hole on the shaft diamet...

AI Technical Summary

Problems solved by technology

When the bearing speed is low (such as when the machine starts or stops), the dynamic pressure lubrication has not yet formed or will disappear, and the probability of direct contact between the bearing spindle and the bearing seat will increase, which will cause the friction torque between the bearing spindle and the bearing seat If it is too large, it will cause severe wear and affect the working life of the bearing

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