JPH02114220U

JPH02114220U -

Info

Publication number: JPH02114220U
Application number: JP2308489U
Authority: JP
Priority date: 1989-03-02
Filing date: 1989-03-02
Publication date: 1990-09-12

Description

[Brief explanation of drawings]

第１図は本考案に係わる磁気軸受用補助軸受の
一実施例を示す縦断側面図、第２図は下部ころが
り軸受を拡大して示す縦断側面図、第３，４図は
他の実施例を示す横断平面図、第５図は従来の磁
気軸受用補助軸受を示す縦断側面図である。１……回転軸、６，７……磁気軸受、９……下
部ころがり軸受、１０……上部ころがり軸受、１
３……下部ころがり軸受９のブツシユ、１６……
コイルばね、１９……可動外輪、２３……リンク
、２６，２８，２９，３０，３１及び２７，３２
……可動外輪１９を一方向及び他方向に回転させ
る外輪回転駆動手段。 Fig. 1 is a vertical side view showing an embodiment of the auxiliary bearing for a magnetic bearing according to the present invention, Fig. 2 is a longitudinal side view showing an enlarged lower rolling bearing, and Figs. 3 and 4 show other embodiments. FIG. 5 is a longitudinal sectional side view showing a conventional auxiliary bearing for a magnetic bearing. 1...Rotating shaft, 6, 7...Magnetic bearing, 9...Lower rolling bearing, 10...Upper rolling bearing, 1
3... Bush of lower rolling bearing 9, 16...
Coil spring, 19... Movable outer ring, 23... Link, 26, 28, 29, 30, 31 and 27, 32
... Outer ring rotation drive means for rotating the movable outer ring 19 in one direction and the other direction.

Claims

[Claims for Utility Model Registration] 1. In an auxiliary bearing for a magnetic bearing that rotatably supports a rotating shaft in place of the magnetic bearing when the supporting function of the magnetic bearing is lost, the conical tapered portions provided at the upper and lower parts of the rotating shaft A magnetic device characterized by comprising upper and lower rolling bearings that contact each other from below through the conical tapered surface of the bushing, and a coil spring that supports the lower rolling bearing among the rolling bearings so as to be movable in the axial direction. Auxiliary bearing for bearings. 2. In an auxiliary bearing for a magnetic bearing that rotatably supports a rotating shaft in place of the magnetic bearing when the supporting function of the magnetic bearing is lost, a rotatable movable outer ring surrounding the rotating shaft and a rotatable movable outer ring disposed around the movable outer ring are provided. A plurality of links each having one end pivoted to the movable outer ring and each middle part pivoting to a fixed member, a plurality of rolling bearings attached to the other end of each link, and the movable outer ring What is claimed is: 1. An auxiliary bearing for a magnetic bearing, comprising outer ring rotation drive means for rotating in one direction and in the other direction.