Variable load, high vacuum shaft bearing test apparatus
AssigneeSiemens Aktiengesellschaft
InventorsHermann Trattner, Kuno Saatze, Adolf Bauereiss
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Abstract
An apparatus has a rotatable shaft driven within a vacuum chamber through a magnetic clutch. A mounting block is carried on a test bearing adjacent one end of the shaft and is restricted from rotating with the shaft by a friction torque measuring device engaged therewith. The block is subjected to axial and radial loads which are adjustably variable during testing by control devices located outside the vacuum chamber and connected to the mounting block by traction linkages passing through seals in the chamber walls. The test bearing is heated inductively; cooling discs and a reservoir are provided on and adjacent the shaft. Vibration measuring and visual observation devices are also disclosed.
Claims3
An apparatus for testing a shaft bearing under high vacuum and variable loads, comprising:
- a high vacuum chamber having peripheral walls;
- a rotatable shaft carried on fixed, spaced-apart shaft support bearings within said chamber and having a magnetic clutch on one end thereof coupled through said wall of said chamber to a drive means, said shaft having a test end opposite said clutch end upon which is mounted said test bearing;
- a test bearing mounting block carried circumjacent said test end of said shaft upon said test bearing;
- a bearing friction torque measuring means in said chamber engaging said mounting block and restraining said block from rotational mvoement;
- a tractive means for applying a load to said mounting block axially of said shaft, said tractive means extending through said vacuum chamber wall at a vacuum seal and to a load control means outside said chamber for varying said axial load on said test bearing;
- the test end of the shaft extending in a stub axially beyond said test bearing opposite said fixed bearings;
- and
- an induction coil spaced radially about the shaft stub, whereby the stub and test bearing may be heated.
Dependencies are inferred from the claim text.