Machine Tool Spindle Assembly With Annular Oil Leakage Control

The housing is divided into multiple sealed chambers: a first chamber housing the bearing, a second chamber for the collecting flow channel, and a third chamber for the annular receiving space. This segmentation isolates the lubrication function from the collection function, preventing oil leakage while maintaining effective bearing lubrication through the supply flow channel.

The annular receiving space acts as an intermediary chamber between the bearing chamber and the collecting flow channel. It captures excess oil that leaks from the bearing before it can contaminate the workpiece or environment, then channels it to the collecting flow channel for removal. This intermediary space resolves the contradiction by providing a controlled transition zone for oil management.

The invention extracts the oil collection function from the mechanical seal system and implements it through a passive geometric feature (the annular receiving space). Instead of adding more active sealing devices, the design takes out the excess oil through gravity and pressure differential into a dedicated receiving space, then removes it via the collecting flow channel. This approach prevents oil leakage without increasing device complexity.

The annular receiving space and collecting flow channel system operates autonomously to manage excess oil. The geometry of the receiving space and the pressure differential created during operation automatically direct oil into the collection channel without requiring additional sealing devices or active control mechanisms. This self-service approach resolves the contradiction by providing effective oil leakage prevention through passive structural design rather than complex active sealing systems.