ALL-CERAMIC JOINT BEARING USED IN HIGH-TEMPERATURE, CORROSION AND OXIDATION-PRONE WORKING ENVIRONMENT

Abstract

The present invention provides an all-ceramic joint bearing used in a high-temperature, corrosion and oxidation-prone environment, which mainly includes an inner ring and an outer ring which are made of zirconia, alumina or silicon carbide ceramic materials. The all-ceramic joint bearing is assembled into a whole through corresponding assembly technologies. An inner side of the outer ring is an inner arc surface, and the inner ring is an outer arc surface. A width of the inner ring is 3-5 mm greater than that of the outer ring, and a movable swing angle of the inner ring is 0-21. The joint bearing made of the ceramic materials has an optimized structure by utilizing the ceramic material characteristics of high temperature resistance, corrosion resistance, high hardness, non-magnetic permeability, wear resistance and self-lubrication.

Claims

1. An all-ceramic joint bearing used in a high-temperature, corrosion and oxidation-prone environment, comprising an inner ring and an outer ring, wherein an inner side of the outer ring is an inner arc surface, and an outer side of the outer ring is a cylindrical outer surface; an outer side of the inner ring is an outer arc surface, and an inner side thereof is a hollow cylinder; a bearing width of the inner ring is 3-5 mm greater than that of the outer ring, and a swing angle of the inner ring is 0-21; an inner wall of the outer ring is closely attached to an outer wall of the inner ring; and the inner ring and the outer ring are made of zirconia, alumina or silicon carbide ceramic materials.

2. The all-ceramic joint bearing used in a high-temperature, corrosion and oxidation-prone environment according to claim 1, wherein a diameter of the hollow cylinder is 37.5% that of the outer side of the outer ring, and a wall thickness of the outer ring is 1-4 mm.

3. The all-ceramic joint bearing used in a high-temperature, corrosion and oxidation-prone environment according to claim 1, wherein upper and lower ends of the inner side of the outer ring are provided with inclination angles.

4. The all-ceramic joint bearing used in a high-temperature, corrosion and oxidation-prone environment according to claim 1, wherein a surface of the inner ring is plated with a layer of diamond powder and the inner arc surface of the outer ring is plated with a layer of graphene.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0012] FIG. 1 is a schematic assembly diagram of an all-ceramic joint bearing used in a high-temperature, corrosion and oxidation-prone environment in an implementation of the present invention;

[0013] FIG. 2 is a structural sectional view of an all-ceramic joint bearing used in a high-temperature, corrosion and oxidation-prone environment in an implementation of the present invention;

[0014] FIG. 3 is a front view of an all-ceramic joint bearing used in a high-temperature, corrosion and oxidation-prone environment in an implementation of the present invention;

[0015] FIG. 4 is a left view of an all-ceramic joint bearing used in a high-temperature, corrosion and oxidation-prone environment in an implementation of the present invention;

[0016] FIG. 5 is an outer ring of an all-ceramic joint bearing used in a high-temperature, corrosion and oxidation-prone environment in an implementation of the present invention; and

[0017] FIG. 6 is an inner ring of an all-ceramic joint bearing used in a high-temperature, corrosion and oxidation-prone environment in an implementation of the present invention.

[0018] In the figure, 1. inner ring, 1-1. hollow cylinder, 2. outer ring, 2-1. inclination angle.

DETAILED DESCRIPTION

[0019] In order to further describe the present invention, the present invention is described in detail below with reference to the accompanying drawings and embodiments, but the accompanying drawings and embodiments should not be understood as limiting the protection scope of the present invention.

[0020] As shown in FIG. 1 to FIG. 6, an all-ceramic joint bearing used in a high-temperature, corrosion and oxidation-prone environment includes an inner ring 1 and an outer ring 2, where an inner side of the outer ring 2 is an inner arc surface, and an outer side of the outer ring 2 is a cylindrical outer surface; an outer side of the inner ring 1 is an outer arc surface, and an inner side thereof is a hollow cylinder 1-1; a bearing width of the inner ring 1 is 3-5 mm greater than that of the outer ring 2, the inner ring 1 can swing around in the outer ring 2, and a swing angle of the inner ring 1 is 0-21; an inner wall of the outer ring 2 is closely attached to an outer wall of the inner ring 1; and the inner ring 1 and the outer ring 2 are made of zirconia, alumina or silicon carbide ceramic materials.

[0021] A diameter of the hollow cylinder 1-1 is 37.5% that of the outer side of the outer ring 2, and a wall thickness of the outer ring 2 is 1-4 mm. Upper and lower ends of the inner side of the outer ring 2 are provided with inclination angles 2-1.

[0022] Compared with metal joint bearings, the all-ceramic joint bearing has a low friction coefficient, high temperature resistance and high hardness, and the service performance and service life of the joint bearing are greatly improved. Thermal expansion coefficients of the zirconia ceramic material and metal are basically the same, and the installation process is basically the same as the installation mode of the metal material. The all-ceramic joint bearing is assembled in a way of thermal expansion of the outer ring and contraction of the inner ring.

[0023] Since the inner ring 1 of the joint bearing mainly bears pressure, in order to improve the compression resistance of the inner ring 1, a surface of the inner ring 1 is plated with a layer of diamond powder. In the application process of the joint bearing, friction easily occurs between the inner ring and the outer ring. In order to reduce the friction coefficient and improve the service life, the inner arc surface of the outer ring 2 is plated with a layer of graphene.

[0024] The foregoing descriptions are only preferred embodiments of the present invention. It should be noted that for a person of ordinary skill in the art, several improvements and modifications may further be made without departing from the principle of the present invention. These improvements and modifications should also be deemed as falling within the protection scope of the present invention.