CN2273789Y

CN2273789Y - Ceramic hall bearing

Info

Publication number: CN2273789Y
Application number: CN 95227578
Authority: CN
Inventors: 包维兴; 包德宏
Original assignee: 胡龙英
Priority date: 1995-11-22
Filing date: 1995-11-22
Publication date: 1998-02-04
Anticipated expiration: 2005-11-22

Abstract

The utility model relates to a ceramic ball bearing, which is composed of an inner ring, an outer ring and a rolling body which is arranged in the middle of the ceramic ball bearing. The utility model is characterized in that the curvature radius of a circular groove path of the inner and outer ring which bears the rolling body is equal to the curvature radius of the rolling body by 0.507-0.515, a radial play between the inner and outer ring and the rolling body is 1/4-1/3 of the radial play of a similar steel bearing, and SI3N4 or ZRO2 structure ceramic is selected as materials of the rolling body. The scheme solves the problems of low hardness, easy abrasion, low temperature resistance, etc. of a rolling body of the existing ball bearing. The utility model can be widely used on industry, national defence, etc.

Description

Rolling element is the ball bearing of pottery

The utility model relates to the ball bearing of a kind of rolling element for pottery.

Widely used various bearings are steel at present, because the hardness of steel rolling element, wear resistance, performance such as high temperature resistant are good not as good as the performance of pottery, limited application, for example the rolling element density of steel is big, and rotary centrifugal force is big, so it is when running up, rolling element skids more serious, has limited the raising of bearing revolution greatly.

The purpose of this utility model is to provide in view of the foregoing the ball bearing of a kind of improved rolling element for pottery, and it can make the performance of ball bearing improve a lot, and particularly is greatly improved at aspects such as high speed, high temperature, corrosion-resistant, running accuracy, life-spans.

For achieving the above object, technical solution of the present utility model is to realize like this, by inner ring 3, the rolling element that outer ring 1 and middle rolling element 2 are formed is the ball bearing of pottery, it is characterized in that: radius of curvature * 0.507～0.515 of half garden shape groove curvature radius=rolling element 2 of inner ring 3 outer rings 1 carrying rolling element.

Described inner ring 3, outer ring 1 is 1/4～1/3 of a similar steel bearing end-play with radial internal clearance between the rolling element 2.

Described rolling element 2 its material selection SI3N4 or ZRO2 structural ceramics.

Owing to adopt such scheme to solve pottery as the rolling element material expansion coefficient problem little than Bearing Steel, improved the running accuracy of bearing, because rolling element material selection structural ceramics, therefore the ball bearing that processes, the life-span is ball bearing life-span of steel to improve 3 times (high-speed bearings) to more than 40 times (high-temperature resistant belt conveyer bearings) than similar rolling element.

Below in conjunction with drawings and Examples the utility model is described further.

Fig. 1 is the utility model structural representation.

Fig. 2 is the rolling element view.

Fig. 3 is the outer ring view.

Fig. 4 is the inner ring view.

Fig. 5 is a rolling element roughing flow sheet.

Fig. 6 is rolling element fine-processing technique figure.Among the figure: 1 outer ring, 2 rolling elements, 3 inner rings.

A most preferred embodiment of the present utility model such as Fig. 1, inner ring 3, the material selection Bearing Steel of outer ring 1, half garden shape groove curvature radius=rolling element radius of curvature * 0.507～0.515 of its carrying rolling element, the radial internal clearance between Internal and external cycle and the rolling element is 1/4～1/3 of a similar bearing steel bearing end-play.Rolling element adopts structural ceramics SI3N4 or ZRO2.The machining process of rolling element is, at first carries out roughing with small quantities of circuit method, as shown in Figure 5, carries out fine finishing by the mode of Fig. 6 then.

Claims

1, rolling element is the ball bearing of pottery, is made up of inner ring (3), outer ring (1) and middle rolling element (2), it is characterized in that; Radius of curvature * 0.507～0.515 of half garden shape groove curvature radius=rolling element (2) of inner ring (3), outer ring (1) carrying rolling element (2).

2, rolling element according to claim 1 is the ball bearing of pottery, it is characterized in that; Inner ring (3), outer ring (1) are 1/4～1/3 of similar steel bearing with radial internal clearance between the rolling element (2).

3, rolling element according to claim 1 is the ball bearing of pottery, it is characterized in that; The material selection SI3N4 of rolling element (2) or ZRO2 structural ceramics.