Assembly method for principal shaft and gearbox of large aerogenerator

Abstract

The invention relates to a method for assembling a main shaft and a gear box of a large-scale wind-driven generator. The assembly steps are as follows: a. the gear box is horizontally arranged on a rack to cause the shaft hole of the main shaft of the gear box to be horizontal, and a hole which relatively penetrates the shaft hole of the main shaft is arranged on the gear box; b. the main shaft is horizontally lifted to target at the installation position of the gear box; c. an overhead travelling crane is adjusted to cause the main shaft to be coaxial with the shaft hole of the gear box; d. a pull rod penetrates the hole of the main shaft and the hole on the shaft center of the gear box, and a fixed block member is underlaid under one end of the pull rod extending out from the main shaft; e. the other end of the pull rod, which extends out from the gear box, is sheathed with a jack, and is provided with a fixing member; f. the jack is driven to extend, and on the premise that both ends of the pull rod are fixed, the extension of the jack can pull the main shaft into the gear box; g. after being pulled into the gear box, the main shaft is fixed on the gear box by a locking ring; h. the main shaft is well supported by the support, and hanging belts are removed; and i. the fixing member and the jack are dismounted, the pull rod is pulled out of the main shaft and the gear box, and finally, the entire assembly process is completed.

Description

【Technical field】 [0001] The invention relates to a method for assembling a main shaft of a large-scale wind power generator and a gear box, and is mainly suitable for assembling a main shaft of a large wind power generator with a non-direct drive structure and a gear box. 【Background technique】 [0002] When the existing large-scale wind turbines are assembled with the main shaft and the gearbox, they all adopt the vertical assembly method, that is, the main shaft is turned upside down first, and then the connection part of the gearbox is placed upwards on the platform, and then the gearbox is placed on the platform. Flip over so that the connecting part of the gearbox is perpendicular to the connecting part of the main shaft, lift the gearbox and place it on the main shaft and ensure that it is concentric with the main shaft, and then slowly drop it so that the connecting part of the gearbox and the main shaft are inserted into the connecting hole spindle. After assemblin...

AI Technical Summary

Problems solved by technology

The disadvantages of this assembly method are: 1. The gearbox is large in size and weighs more than ten tons, making it difficult and dangerous to turn over

The hydraulic wrench weighs more than ten kilograms, so the operator is prone to fatigue, which greatly reduces the efficiency of assembly and is prone to accidents

3. Since the assembly height after assembly is 5 to 6 meters, the weight is as high as nearly 30 tons

It is too difficult to flip, the efficiency is too low, and the risk is great

4. Due to the high height of the assembly parts, the requirements for the lifting height of the assembly workshop are also high

5. Due to the need to flip parts multiple times, the relatively long time spent on the crane is not conducive to mass production

6. Since the assembly point is above 2 meters high, a platform needs to be installed, and workers need to work at heights, which increases the danger of work

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