Roller mill
US7967228B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 28, 2008 |
| Grant date | Jun 28, 2011 |
| Priority date | — |
| Expiry date | Apr 28, 2028 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB02C15/00
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Described is a roller mill (1) for grinding particulate material, such as cement raw materials, cement clinker and similar materials, said roller mill comprising a substantially horizontal grinding table (3), at least one therewith interactively operating roller (4) which is configured for rotation about a roller shaft (6) through the use of a bearing (7) for the roller, and a closed circulation system for lubricant for lubricating the bearing (7) for the roller, said circulation system comprising a reservoir (9), ducts (10) for feeding of lubricant to the bearing (7) for the roller and ducts (11) for recirculating the lubricant from the bearing (7) for the roller. The roller mill further comprises an autogenously regulated pressure pump means (20) which is driven by the rotation of the roller (4), and has a first part (21) which is mounted on the roller shaft (6) and a second part (22) which is mounted on the roller (4) and rotates therewith.During the operation of the mill the pump means delivers a significant pressure contribution for recirculating the lubricant to the reservoir, and has a capacity which is proportional to the rotational speed of the roller and hence the lubrica…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.