Composite self-lubricating bearing

Abstract

The invention relates to a composite self-lubricating bearing which comprises a bearing group and a shell, wherein the bearing group is formed by assembling at least one bearing unit, and the bearing unit is provided with an axially-perforative axial hole in which an axial core passes through; the shell is a hollow tube body which is used for sleeving on the outer edge of the bearing group along the axial core direction in a sealing way, and at least one storage tank for storing a lubricating medium is defined by the bearing group and the shell. At least one microgap runner communicated with the axial hole is arranged round the storage tank so as to continuously supply the lubricating medium. The lubricating medium exerts the efficacy of high-quality lubrication between the axial core and the axial hole.

Description

technical field [0001] The invention relates to a composite self-lubricating bearing, in particular to a composite self-lubricating bearing which can automatically replenish lubricating medium to achieve enhanced grinding effect. Background technique [0002] In order to make the operation between the bearing and the rotating shaft smooth, and to avoid abnormal friction and heat generation, it is usually necessary to frequently add additional lubricants (lubricant), such as lubricating oil with low viscosity and high viscosity Lubricating grease (gerase) and lubricants containing solid lubricating particles, etc., in order to continuously form a tribology interface (tribology interface) between the inner wall of the shaft hole and the outer wall of the rotating shaft core that is sufficient to carry the load of the shaft core; however, due to frequent Adding additional lubricating medium is not only labor-intensive but also inconvenient. If the lubricating medium is not repl...

AI Technical Summary

Problems solved by technology

[0002] In order to make the operation between the bearing and the rotating shaft smooth, and to avoid abnormal friction and heat generation, it is usually necessary to frequently add additional lubricants (lubricant), such as lubricating oil with low viscosity and high viscosity Lubricating grease (gerase) and lubricants containing solid lubricating particles, etc., in order to continuously form a tribology interface (tribology interface) between the inner wall of the shaft hole and the outer wall of the rotating shaft core that is sufficient to carry the load of the shaft core; however, due to frequent Adding additional lubricating medium is not only labor-intensive but also inconvenient. If the lubricating medium is not replenished in time, it will quickly cause excessive friction and heat generation and damage to the bearing and shaft core in the non-lubricated state

The existing self-lubricating bearings generally use lubricating oil to form the lubricating interface between the shaft hole and the shaft core. However, due to the thin lubricating oil film formed, the carrying capacity of the existing self-lubricating bearings is limited. The viscosity at high temperature will become lower, resulting in a thinner lubricating oil film. At this time, if the bearing must operate at high speed or high load, the shaft core may push the lubricating oil film on the wall of the shaft hole. The shaft core directly collides with the wall of the shaft hole at a high speed, thus causing excessive wear and heating of the existing self-lubricating bearing, which will eventually cause noise, shaft scraping, and hole expansion of the self-lubricating bearing to accelerate damage

[0003] Conversely, since the viscosity of lubricating grease and lubricants containing solid lubricating particles is usually higher than that of lubricating oil, a thicker lubricating interface can be formed between the shaft core and the shaft hole, making it less likely to occur when operating at high temperatures. Excessive wear, also has better load carrying capacity, but due to the high viscosity characteristics of lubricating grease and lubricants containing solid lubricating particles, it is usually only suitable for existing ball bearings, but ball bearings are composed of many slender components Compared with self-lubricating bearings, it not only has the disadvantages of high price, complex structure and weak structure, but also makes it in the application environment of high temperature, high load and high speed. High temperature capability and service life are severely challenged

Compared with the existing self-lubricating bearings, although it has the characteristics of low price, simple structure and strong structure, because self-lubricating bearings are usually made of porous materials with small holes, it is not easy to impregnate high-viscosity lubricants Grease and lubricants containing solid lubricating particles, and due to the high viscosity characteristics of lubricating grease and lubricants containing solid lubricating particles, it is difficult to supply oil smoothly, let alone the uniformity of the lubricating interface. If the lubricating grease And the lubricant containing solid lubricating particles is directly applied to the wall of the shaft hole. Although the bearing capacity of the self-lubricating bearing can be temporarily improved to a certain extent, however, once the lubricating grease or the lubricant containing solid lubricating particles is gradually It will also quickly cause the problems of excessive wear and rapid temperature rise of self-lubricating bearings

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