JPH0158823U

JPH0158823U -

Info

Publication number: JPH0158823U
Application number: JP15461687U
Authority: JP
Priority date: 1987-10-07
Filing date: 1987-10-07
Publication date: 1989-04-13

Description

[Brief explanation of the drawing]

第１図は本考案の第１の実施例をなすセラミツ
ク製スラスト軸受の衝撃破壊防止機構の構造を示
す断面図、第２図は本考案の第２の実施例をなす
セラミツク製スラスト軸受の衝撃破壊防止機構の
構造を示す断面図、第３図は本考案の第３の実施
例をなすセラミツク製スラスト軸受の衝撃破壊防
止機構の構造を示す断面図、第４図は本考案の第
４の実施例をなすセラミツク製スラスト軸受の衝
撃破壊防止機構の構造を示す断面図、第５図は本
考案の第５の実施例をなすセラミツク製スラスト
軸受の衝撃破壊防止機構の構造を示す断面図、第
６図は従来のセラミツク製スラスト軸受の構造を
示す断面図であり、第７図はその表面にスパイラ
ル状の溝が形成されたセラミツク製の板体を示す
平面図である。図中、１１……主軸、１２……スラストデイス
ク、１３……レベリングデイスク、１４……セラ
ミツク製軸受板、１５……ケーシング、１６……
調芯装置、１７……受板、１９，２０……弾性体
、２１……Ｏリング、２２……スプリング材、２
３……緩衝機構、２４……シリンダ、２５……Ｏ
リング、２６……油、２７……プラグ。 Fig. 1 is a sectional view showing the structure of an impact fracture prevention mechanism for a ceramic thrust bearing which is a first embodiment of the present invention, and Fig. 2 is a sectional view showing the impact of a ceramic thrust bearing which is a second embodiment of the present invention. FIG. 3 is a sectional view showing the structure of the impact destruction prevention mechanism for a ceramic thrust bearing, which is the third embodiment of the present invention, and FIG. 4 is the fourth embodiment of the present invention. FIG. 5 is a sectional view showing the structure of an impact destruction prevention mechanism for a ceramic thrust bearing according to a fifth embodiment of the present invention; FIG. FIG. 6 is a sectional view showing the structure of a conventional ceramic thrust bearing, and FIG. 7 is a plan view showing a ceramic plate having spiral grooves formed on its surface. In the figure, 11... main shaft, 12... thrust disk, 13... leveling disk, 14... ceramic bearing plate, 15... casing, 16...
Alignment device, 17... Receiving plate, 19, 20... Elastic body, 21... O ring, 22... Spring material, 2
3...Buffer mechanism, 24...Cylinder, 25...O
Ring, 26...Oil, 27...Plug.

Claims

[Claims for Utility Model Registration] (1) A ceramic bearing with a spiral groove for generating dynamic pressure formed on its surface between a thrust disk provided at the lower end of the rotating body shaft and a receiving member provided below it. In a thrust bearing having a ceramic plate with a plate interposed therebetween, which generates dynamic pressure during rotation of the rotating body and supports the load of the rotating body, other than the sliding portion between the thrust disk and the ceramic bearing plate. An impact destruction prevention mechanism for a ceramic thrust bearing, characterized in that a buffer portion is provided at a predetermined position of the rotor for absorbing the impact force generated when the rotating body moves through the clearance in the axial direction. (2) Utility model registration claim No. 1 characterized in that the buffer portion is made of an elastic material such as rubber or resin.
Impact destruction prevention mechanism for ceramic thrust bearings described in (1). (3) The mechanism for preventing impact destruction of a ceramic thrust bearing as set forth in claim (1) of the utility model registration, characterized in that a spring is used in the buffer portion. (4) The impact destruction prevention mechanism for a ceramic thrust bearing as set forth in claim (1) of the utility model registration, characterized in that the buffer portion uses a buffer mechanism that utilizes a pressure fluid such as oil.