Ball bladder multi-ferrule bearing with reducing middle-layer ferrule

Abstract

The invention relates to a bearing, in particular to a multi-roller layer (multi-ferrule bearing) bearing. The ball bladder multi-ferrule bearing with a reducing middle-layer ferrule comprises a ball bladder type outer ferrule, a reducing middle-layer ferrule, an inner ferrule, an inner rolling body and outer rolling bodies, wherein the upper end and the lower end of the axial lead of the ball bladder type outer ferrule are respectively provided with a shaft mounting hole; at least two rows of outer rolling bodies bear axial force; the inner rail of the ball bladder type outer ferrule is a round ball bladder inner rail; and the diameter of the axial force bearing end of the ball bladder inner rail is small. Meanwhile, the ball bladder multi-ferrule bearing which combines a tip bearing of the axial double-row rolling bodies and a self-aligning bearing of the radial three-row rolling bodies is formed by absorbing and developing the self-aligning action and the low-friction efficacy of the tip bearing and the self-aligning bearing. The ball bladder multi-ferrule bearing with the reducing middle-layer ferrule not only has the characteristics of extremely low friction and low abrasion but also has the self-aligning action and extremely low frictional resistance of the tip bearing and the self-aligning bearing. According to the ball bladder multi-ferrule bearing disclosed by the invention, the fatal defect of the low axial bearing force of the tip bearing and the self-aligning bearing is overcome, so that the self-aligning, low frictional resistance and low abrasion of the bearing are realized, and axial and radial bearing forces are greatly improved.

Description

Technical field: [0001] The present invention relates to bearings, in particular to multi-roller layer (multi-ring bearings) bearings. Background technique: [0002] In the prior art, Sweden's "SKF Bearing Company" and relevant documents in my country have clearly recorded that although multi-ring bearings can greatly reduce frictional resistance, they can generally only be used for equipment or pendulums that operate in opposite directions at the same time. Vibration equipment, or used for large rollers with low rotational speed and unstable shaft center, to compensate for eccentricity and reduce the experimental conclusions of starting resistance, because multi-ring bearings will There are fatal flaws in operation, such as: [0003] (1) The two-layer rollers of the existing multi-ring bearings are mostly the same circumferential track line, and the middle layer ring is sandwiched between the two-layer rollers. The rings are not controlled by the shaft or the shell during o...

AI Technical Summary

Problems solved by technology

[0002] In the prior art, Sweden's "SKF Bearing Company" and relevant documents in my country have clearly recorded that although multi-ring bearings can greatly reduce frictional resistance, they can generally only be used for equipment or pendulums that operate in opposite directions at the same time. Vibration equipment, or used for large rollers with low rotational speed and unstable shaft center, to compensate for eccentricity and reduce the experimental conclusions of starting resistance, because multi-ring bearings will There are fatal flaws in operation, such as:

[0003] (1) The two-layer rollers of the existing multi-ring bearings are mostly the same circumferential track line, and the middle layer ring is sandwiched between the two-layer rollers. The rings are not controlled by the shaft or the shell during operation. They are subjected to axial, radial and complex comprehensive moments in the clearance of two or more layers of rollers, and irregular tilting angle differences will occur. Vibration, with the increase of speed, this kind of shimmy will develop into strong resonance and accelerate the damage of bearing;

[0004] (2) The longitudinal section of the middle layer ring in the multi-ring bearing is a straight plate load-bearing structure, and the middle layer ring is subjected to the alternating pressure of vertical shear and bending of the fulcrum of the inner and outer two layers of rolling elements, and the stress concentration At the fulcrum, it is easy to cause the middle layer ring to be broken, just like hitting the middle with a hammer after the two ends of the plank are supported, so the middle layer rings of the low-speed multi-ring bearings currently used are very thick. In order to increase the bearing capacity, however, this not only increases the diameter of the bearing, but also increases the difference in the center of gravity, and because of the inertia of the gravity of the intermediate ring, the swing is more likely to lose control and cause greater harm;

[0005] (3) Experiments have confirmed that due to the problem of diameter difference in traditional multi-ring bearings, the frictional resistance of each layer of rolling elements is very different, and it is difficult to achieve synchronous rotation or cannot rotate at the same time, which is very unfavorable to reduce frictional resistance;

[0006] (4) In the existing self-aligning bearings, the outer ring of the spherical surface with the largest diameter is basically used as the inner track, and the contact angle between the inner track of the spherical surface with the largest diameter and the rolling body is the smallest, forming an axial bearing capacity The congenital defect that is too small, and the axial load-bearing rolling elements of the existing top bearings and self-aligning bearings are all single-row structures, forming another congenital defect that the axial bearing capacity is too small

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