Lubricating device for main shaft of water turbine

The utility model provides a water turbine main shaft lubricating device, which comprises a fixed oil tank arranged on the outer wall of a water turbine main shaft, and is characterized in that a block tile is fixed on the outer wall of the water turbine main shaft through a bearing seat, a rotating oil basin is sleeved on the outer wall of the bearing seat, and a hot oil delivery pipe is arranged in the rotating oil basin. By utilizing the characteristics that the block tiles are easy to process, adjust, install and maintain and matching with the rotating oil basin, the cooling effect is good, and the capacity of a cooler does not need to be increased, when the block tiles on the outer wall of the main shaft bear large loads, lubricating oil in the oil basin can be guided out through the hot oil guide-out pipe under the centrifugal force effect of the rotating oil basin; lubricating oil in the fixed oil tank is kept at low temperature all the time, the lubricating requirement is completely met, the lubricati