Combined closed type mill exhauster bearing housing

A combination sealing type mill exhauster bearing box relates to a bearing box for middle speed mill exhausters, belonging to the mill exhauster technical field, which can resolve the problem as bad sealing effect. The bearing box comprises a box body, a rotation shaft, a rolling bearing, a bearing gland and a sealing device, which is characterized in that the sealing device adopts a combination seal, which mounting hole is arranged on the outer end face of the bearing gland, the oil seal of the combination is stuffed in the mounting hole, an oil retaining ring is arranged at the bottom of the mounting hole, the oil seal can be a semicircle abut oil seal, having simple detection and exchange, and the oil retaining ring can prevent lubricant from being splashed into the sealing device. The utility model resolves the application defect of the prior felt saw tooth slot type sealing device, as bad sealing effect, to improve the working reliability and service of the bearing box, having wide application on middle