Lubrication system and its modification method

摘要

A lubrication system for a bearing (3) of a machine (1). The system comprises an oil tank (2), and an oil supply pipe (12) for supplying the lubricant oil from the oil tank (2) to the bearing (3). The system further comprises an outlet pipe (20) for guiding the lubricant oil from the bearing (3) substantially vertically downward so that an outlet pipe oil level may be formed in the outlet pipe (20). The system further comprises an oil returning mother pipe (31) for guiding the lubricant oil from the outlet pipe (20) to the tank (2). The oil returning mother pipe (31) includes a substantially horizontal part and a weir (6) or a flow resistance disposed close to the tank so that substantially all portion of the substantially horizontal part may be maintained full of lubricant oil.