METHOD OF IN-PLACE REPAIR OF GEARS OF LIFTING WINCH OF MINING EXCAVATORS Russian patent published in 2023 - IPC B23P6/00 F01M9/02 

FIELD: repairs.

SUBSTANCE: invention is related to in-place repair of kinematic gear pairs of a lifting winch gearbox for mining excavators operating in open-pit mining in the Far North. Tribological compositions are used in form of a dry ultradispersed powder, the first tribological composition is used to increase the class of cleanliness of the working surfaces of the gear teeth of the reducer and apply a protective ceramic-metal layer, and the second tribological composition is used to reduce the friction force in the contact pair, while the repair includes the steps at which: the above-mentioned first tribological composition is added in the amount of 1600 g to the industrial oil taken from the gearbox of the lifting winch of a mining excavator, and mixed, the mixture of oil with the first tribological composition is poured into the gearbox and the gearbox drive is started for 4 hours on the forward stroke, then for 4 hours on the reverse stroke, then everything is repeated with the mentioned second tribological composition.

EFFECT: invention ensures trouble-free operation of parts of circular, crank and reciprocating linear motion, and also extends the service life of the excavator by 3-5 times.

1 cl, 1 ex