A method for replacing the bearing of the motor side of the planetary frame of the wind power gearbox in the air

Abstract

The invention discloses a method for replacing a planet carrier motor side bearing of a wind power gear box in air. The method comprises the following steps that a parallel-stage part and a planetary-stage part of the wind power gear box are separated in a cabinet, then a center pipe shaft and a sun gear are pulled out from a planet carrier, and finally, the planet carrier motor side bearing is replaced. The planet carrier motor side bearing can be replaced by six persons within six working days as long as a draught fan is allowed to be hoisted by persons. A device used in the method is high in structural strength, and convenient to dismount and maintain; and the downtime is short, the cost is low, the operation can be conducted in the cabinet at the wind speed of lower than 15 m / s, and all costs are only about RMB one hundred thousand.

Description

technical field [0001] The invention relates to the maintenance of a gearbox for wind power generation, in particular to a method for replacing bearings on the motor side of a planet carrier in the air for a wind turbine gearbox with a one-stage planetary and two-stage parallel structure. Background technique [0002] For wind power gearboxes (one-stage planetary two-stage parallel structure), if it is found that the bearing on the motor side of the planetary carrier is damaged and cannot be taken out directly, it is basically necessary to hang the gearbox as a whole from the wind turbine and return it to the factory for replacement; the reason for this situation is that, The bearing on the side of the planet carrier motor is installed between the planetary gear train of the gearbox and the parallel stage box, the inner ring of the bearing is installed on the journal of the planet carrier motor side with interference, and the outer ring of the bearing is installed in the hole...

AI Technical Summary

Problems solved by technology

[0002] For wind power gearboxes (one-stage planetary two-stage parallel structure), if it is found that the bearing on the motor side of the planetary carrier is damaged and cannot be taken out directly, it is basically necessary to hang the gearbox as a whole from the wind turbine and return it to the factory for replacement; the reason for this situation is that, The bearing on the side of the planet carrier motor is installed between the planetary gear train of the gearbox and the parallel stage box, the inner ring of the bearing is installed on the journal of the planet carrier motor side with interference, and the outer ring of the bearing is installed in the hole of the parallel stage box; replacing the bearing not only It is necessary to separate the planetary stage from the parallel stage box, and to extract the tube shaft and sun gear from the planetary carrier; however, due to the limited space in the nacelle and the heavy weight of the gearbox, the wind turbine gearbox is always hung down from the wind turbine as a whole. Transport to the factory for maintenance; before the development of this process plan, once the wind power gearbox encounters planet carrier bearing damage, the general method adopted at home and abroad is to lift the wind power gearbox from the wind turbine and transport it to the factory for maintenance. Transported back to the wind farm for installation; the wind turbine gearbox is hoisted and the wind turbine is returned to the factory for maintenance, which has the following disadvantages: (1) The downtime is long, and it takes two days for the gearbox to be hoisted up and down, at least two days for transportation, and at least two days for factory maintenance; (2) ) The cost is high, regardless of the loss of power generation during shutdown, the hoisting cost will cost 200,000 yuan, plus transportation and maintenance costs, at least 300,000 yuan; (3) It is obviously affected by the weather, and the wind speed exceeds 10m / s. It cannot be hoisted in the rain, and it is obviously affected by the weather

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