Bearing units with back-up bearings especially for supporting rapidly rotating shafts of compressors

Abstract

The invention relates to a bearing arrangement for rotatably supporting a shaft (7) relative to a housing (8), comprising a backup bearing (9) designed as a rolling bearing, wherein the rolling bearing can absorb Forces on it, and are especially configured as angular contact ball bearings, especially double row angular contact ball bearings, wherein the rolling bearing (9) is essentially idle in the radial direction. The object addressed by the present invention is to specify a bearing arrangement with a backup bearing for the shaft, which is able to better absorb, in particular, the forces that occur when a rapidly rotating solid shaft is accommodated.

Description

technical field [0001] The invention relates to a bearing arrangement with a backup bearing, in particular as part of a bearing of a rapidly rotating shaft of a compressor. Background technique [0002] Bearings are known in practice in which the shaft is mounted rotatably in, for example, magnetic bearings. The support mechanism includes a bearing arrangement with backup bearings, wherein at least one backup bearing accommodates the shaft if the magnetic bearing fails. During normal operation of at least one magnetic bearing, a backup bearing gap is formed between the peripheral side of the shaft and the peripheral side of the inner bearing ring of the backup bearing pointing toward the shaft. [0003] It is problematic to accommodate very fast rotating shafts of great weight in backup bearings in the event of failure of the magnetic bearing of the bearing, for example a solid shaft of a compressor which rotates at up to approximately 6000 revolutions per minute. In this ...

AI Technical Summary

Problems solved by technology

In this case very high forces which can damage the spare bearing occur

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