CN2140444Y

CN2140444Y - Ceramic bearing having surface specially treated

Info

Publication number: CN2140444Y
Application number: CN 93201850
Authority: CN
Inventors: 包维兴; 尤凤伦; 姚玉英; 王荣娣
Original assignee: 包维兴
Priority date: 1993-02-08
Filing date: 1993-02-08
Publication date: 1993-08-18
Anticipated expiration: 2003-02-08

Abstract

The utility model relates to a ceramic bearing having surface specially treated. The base body of the utility model is the engineering ceramic material such as silicon nitride (Si 3 N4), or zirconium dioxide (ZrO2), or alumina (Al 2 O3), etc. After the surface is treated by expanding seepage, the compactness of the surface structure is increased, the self lubricity of the bearing is enhanced, and the bearing vibration and the working temperature rise are lowered.

Description

Ceramic bearing having surface specially treated

The utility model relates to a kind of ceramic bearing of surperficial special processing.

The come out history of existing more than ten years of ceramic bearing, it has advantages such as high temperature resistant, acid resistant alkali, magnetic conduction and proportion is not low, so shown huge superiority in fields such as air breathing engine, chemical industry and nuclear facility.States such as the U.S., West Germany and Japan are all in the research of being devoted to ceramic bearing and production, but ceramic bearing also exists major defect, its tissue is tight not as metal bearing, on microcosmic, be loose cellular, as shown in Figure 2, bearing owing to air spots produces vibration, has increased the noise and the rub-moment of bearing in operation process; Cavernous tissue can hold the abrasive particle in some course of working, quickens the wearing and tearing of working surface; Grease that holds in the hole and various liquid can volatilize under certain condition, and this is unallowed concerning the bearing that requires to work in vacuum environment.

The purpose of this utility model is sought a kind of solution exactly, overcomes the various adverse effects that bring the ceramic bearing surface pore, improves the performance of bearing.

For achieving the above object, technical solution of the present utility model is to realize like this, adopt a kind of special " the surface expansion is oozed " technology, molybdenum disulfide, tungsten disulfide or other solid lubricant are expanded top layer and the inferior top layer that is seeped into the bearing working surface, and make it firm attached on the ceramic matrix, change the ceramic material surfaces rarefaction, increase the close property of knitting on top layer and time top layer, overcome the intrinsic defect of ceramic bearing.

Expand its vibration values of bearing ooze processing by the surface and can reduce the 2-4 decibel, the bearing working temperature rise obviously descends, and material is oozed in expansion such as molybdenum disulfide can also serve as lubriation material, turns round in working environment more than 300 ℃ and need not lubricate.

The concrete structure and the technology thereof of model utility are provided by the following drawings.

Fig. 1 is the utility model structural representation, among the figure: 1. bearing outer ring, 2. bearing inner race, 3. spheroid, 4. retainer.

Fig. 2 is existing metal bearing material microcosmic schematic representation.

Fig. 3 is the utility model stupalith microcosmic schematic representation.

Fig. 4 oozes the device sketch for expanding.

Fig. 5 is the solidification equipment sketch.

Fig. 6 is a lappingout process sketch.

Accompanying drawings most preferred embodiment of the present utility model.

The manufacturing process of special processing divide expand ooze, curing and lappingout three phases.Fig. 4 expands to ooze the device sketch, and part 5 be a container, and 6 for molybdenum disulfide or tungsten disulfide fine powder and promote to expand the solvent that oozes, and 7 for will expand the ceramic bearing part that oozes, and the driven by motor container rotates certain hour and just finished expansion infiltrate journey.

Fig. 5 is the solidification equipment sketch, and part 8 is a curing vessel, and part 9 is for adding heat vent, and 10 is curing agent, and 7 is the ceramic bearing part, and 11 is the mercury switch thermometer.By add gentle stir certain hour after, expand ooze material securely with the matrix bond of ceramic part.

Fig. 6 is a lappingout process sketch, and part 12 grinds dish on being, is pressurizeed downwards by oil pressure cylinder.Part 13 grinds dish under being, is rotated by driven by motor.Part 3 is ceramic ball or ceramic roller.The pottery rolling element is done rotation and revolution in the groove grinding dish, makes to expand to ooze thing and matrix bond is more firm, and surface quality and geometric accuracy are improved, and its surface roughness can reach Ra0.02.

By special expansion ooze processing 15/64 " ceramic ball; after above-mentioned special processing, ball monomer vibration values is reduced to the 33-36 decibel by the 37-38 decibel before handling, be contained on the bearing after; the bearing vibration value is reduced to the 33-36 decibel by the 38-40 decibel, and bearing temperature rise descends 15 ℃.

Claims

1, a kind of ceramic bearing of surperficial special processing is characterized in that at material be silicon nitride (Si ₃O ₄), zirconium oxide (ZrO ₂) or aluminium oxide (Al ₂O ₃) wait the bearing body upper surface expansion of engineering ceramic material to ooze solid lubricants such as molybdenum disulfide and tungsten disulfide.