Thin oil lubrication bearing device of motor for coal mine main ventilator

Abstract

The invention discloses a thin oil lubrication bearing device of a motor for a coal mine main ventilator. The thin oil lubrication bearing device comprises a rotating shaft. A bearing front cover, a first bearing, a second bearing and a bearing back cover are arranged on the rotating shaft in sequence. A bearing base is arranged between the bearing front cover and the bearing back cover in a clamping mode. The bearing front cover is arranged on the front side of the first bearing in a covering mode. A front cover cavity is formed in the bearing cover. An outer partitioning ring is clamped between an outer ring annular body of the first bearing and an outer ring annular body of the second bearing. An oil inlet channel and an oil returning channel communicated with the front cover cavity are arranged in the bearing front cover. The bearing base is provided with a middle oil inlet channel and a middle oil returning channel. The outer partitioning ring is provided with a radial oil inlet. The oil inlet channel, the middle oil inlet channel, the oil inlet, an oil returning opening, the middle oil returning channel, the front cover cavity and the oil returning channel are communicated in sequence. The thin oil lubrication bearing device of the motor for the coal mine main ventilator is good in sealing performance, high in operation reliability and capable of providing continuous and sufficient lubrication for a rolling bearing.

Description

technical field [0001] The invention belongs to the lubricating technology of motor bearings, and in particular relates to a thin oil lubricating bearing device for a motor used in a coal mine main ventilator. Background technique [0002] Coal mine main ventilator is a kind of ventilator widely used in coal mine production, and its operation reliability is directly related to the safe production of coal mine. The motor for the main fan of the coal mine is a special motor for the main fan of the coal mine, which is built in the inner cylinder of the fan. The distance between the lubricating point of the motor bearing and the outer cylinder of the fan is relatively long, and the lubrication point of the motor bearing cannot be directly reached manually, so the lubricating point of the fan motor bearing and the lubrication interface of the main fan outer cylinder can only be connected through a long lubricating pipe together. At present, the rolling bearings of the main fan ...

AI Technical Summary

Problems solved by technology

The distance between the lubricating point of the motor bearing and the outer cylinder of the fan is relatively long, and the lubrication point of the motor bearing cannot be directly reached manually, so the lubricating point of the fan motor bearing and the lubrication interface of the main fan outer cylinder can only be connected through a long lubricating pipe together

At present, the rolling bearings of the main fan motor are all lubricated with grease. Due to the high viscosity of the grease and the long lubricating pipeline, the grease often cannot be filled into the rolling bearing, and even the grease is dry in the lubrication pipeline, causing the blower motor Poor bearing lubrication, which in turn leads to motor bearing failure

Because the lubrication point of the motor bearing cannot be directly reached manually, the non-lubricating grease that has lubricated the bearing cannot be discharged from the motor bearing cover, resulting in severe friction between the bearing accessories and the grease, and the temperature of the bearing will rise. Poor natural heat dissipation conditions lead to high operating temperature of the bearing

The lack of effective lubrication of the rolling bearings of the fan motor and the high working temperature of the bearings will lead to the failure of the bearings to lock the shaft, which will cause the main fan to stop running, seriously affecting the safe production of coal mines

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