Method for reducing wear of tail shaft and underwater bearing bush of trough type ore washer

The invention relates to the technical field of ore washing, in particular to a method for reducing wear of a tail shaft and an underwater bearing bush of a trough type ore washer. The method comprises steps as follows: shaft sealing water is provided by a high-position water tank through a main water supply pipe and a shaft sealing water pipe, ore washing water is provided by a return water tankfor the ore washer, and supplementary water of the return water tank is provided by the high-position water tank. The method further comprises the steps as follows: improvement of a water supply network: a booster pump and a filter net are arranged between the high-position water tank and the main water supply pipe, and a solenoid valve is arranged on each branch water supply pipe; improvement ofthe shaft sealing water pipe: the shaft sealing water pipe adopts a straight pipe and is equipped with a blow-off valve; improvement of the supplementary water of the return water tank: the supply quantity and the supply manne