Lubricating oil supply system for calender

The utility model discloses a calender lubrication oil supply system, which belongs to the technical field of calenders and comprises an oil supply tank, an oil supply pump and an oil return tank, an output end of the oil supply pump is connected with an oil supply pipe, and the tail end of the oil supply pipe is provided with a plurality of groups of oil supply branch pipes communicated with inner cavities of shell seats of different transmission bearings. The oil supply pump conveys lubricating oil in the oil supply tank into inner cavities of shell bases of different transmission bearings through pumping, the shell bases of the transmission bearings are communicated with the oil return tank through oil return branch pipes, the oil return tank is communicated with the oil supply tank through oil return pipes, and the horizontal height of the oil return tank is larger than that of the oil supply tank. The lubricating oil can automatically flow back into the oil supply tank under the action of gravity, due to