Oil-containing bearing

Abstract

The present invention discloses an oil-containing bearing with characteristics of low production cost, good wear resistance, good lubricating property, and gluing resistance. The oil-containing bearing comprises a bearing ring made from metal powder, and a bearing hole, wherein an inner ring made from metal powder is arranged between the bearing ring and the bearing hole, the inner ring contacts the bearing ring and has the porosity of less than the porosity of the bearing ring, the inner ring is made from copper powder, iron powder or iron-copper powder, and the inner ring and the bearing ring are connected in a dovetail-arranged-in-dovetail-groove manner. According to the present invention, the porosity of the bearing ring can be increased to increase the lubricating oil content, such that the high lubricating oil content bearing ring can provide more lubricating oil for the inner ring having the porosity of less than the porosity of the bearing ring and arranged inside the bearing ring so as to improve the lubricating property in the case of increase of wear resistance of the inner ring.

Description

technical field [0001] The invention relates to a bearing, in particular to an oil-impregnated bearing. Background technique [0002] Oil-impregnated bearings, that is, porous bearings, use metal powder as the main material. Common materials include: copper powder, iron powder, iron-copper powder, and sintered bodies made by powder metallurgy. The number, size, shape and distribution of pores can be adjusted freely. When the oil-impregnated bearing is in a non-operating state, the lubricating oil fills its pores. Since the thermal expansion coefficient of the oil-impregnated bearing is greater than that of the lubricating oil, the lubricating oil is squeezed into the friction surface from the pores of the oil-impregnated bearing during operation. The temperature drop is sucked back into the pores of the oil-impregnated bearing. Oil-impregnated bearings have the characteristics of low cost, vibration absorption, low noise, and no need to add lubricating oil during a long wo...

AI Technical Summary

Problems solved by technology

Oil-impregnated bearings operating at high speeds and light loads require high oil content, high porosity, good lubrication performance, but low wear resistance; oil-impregnated bearings operating at low speeds and large loads require high strength and low porosity. Good wear resistance, but poor lubrication performance

When the oil-impregnated bearing made of iron powder is working, it is also easy to glue with the steel shaft rotatingly connected in the oil-impregnated bearing

The wear resistance of oil-impregnated bearings made of copper powder can be greatly improved. Due to the low porosity in the bearing ring of oil-impregnated bearings, the amount of lubricating oil contained is relatively small, resulting in low lubricating performance, high production costs, and low profits.

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