Sprocket drum mounting means

摘要

A scraper-clan conveyor sprocket drum 10 is rotatably mounted in a drive frame by means of roller bearings 12 at each end of the sprocket drum. A respective slide ring seal 19, 20 is provided between each bearing 12 and the adjacent end of the sprocket drum 10. Lubricant is supplied to both bearings 12 and both seals 19, 20, a respective lubricant path being provided for the bearing and seal at each end of the sprocket drum 10. Each lubricant path includes a lubricant supply passage 23, 24 leading to a bearing space 15 surrounding the respective bearing 12, and a lubricant discharge path 26, 27, 28, 30 leading from a seal space 18 surrounding the respective seal 19, 20. Each seal space 18 is connected to the associated bearing space 15. A plastics ring 34 blocks channels 27 until deformed by pressure of lubricant to allow passage thereof through gap 28.