Multi-synchronous bolt fastening device for connecting main shaft and gearbox of wind power generating set

Abstract

The invention discloses a multi-synchronous bolt fastening device for linkage of a wind turbine generator system spindle and a gearbox. The multi-synchronous bolt fastening device comprises a wrench advancing and retreating mechanism and a linkage opening and closing mechanism installed on the wrench advancing and retreating mechanism. The linkage opening and closing mechanism comprises two wrench installation plates, a rotating pin shaft, a lead screw, a hand wheel and a fixing base, wherein the hand wheel is fixed to one end of the lead screw. Two threaded sections with opposite threads are arranged on the lead screw in a spaced mode. The two threaded sections are each provided with a lead screw nut. Each lead screw nut is movably hinged to the corresponding wrench installation plate. The two wrench installation plates are vertically installed on the fixing base. The upper portions of the two wrench installation plates can be folded close to each other or unfolded away from each other. A combination space through which the spindle is allowed to penetrate is formed between the two wrench installation plates in a combined mode. The lower portions of the wrench installation plates are movably hinged to the fixing base through a rotating pin shaft and extend downwards to form bottom feet movably hinged to the lead screw nuts. The upper portion of each wrench installation plate is provided with a plurality of hydraulic wrenches and at least two positioning pin assemblies. The multi-synchronous bolt fastening device has the advantages of being efficient, convenient to assemble and disassemble and the like.

Description

technical field [0001] The invention relates to the technical field of fastening bolts, in particular to a multi-synchronous bolt fastening device for connecting the main shaft of a wind power generating set and a gearbox. Background technique [0002] At present, in the production of doubly-fed horizontal axis wind turbines in most wind power enterprises, the connection of "main shaft and gearbox" adopts expansion sleeves and bolt fastening methods. The operation procedure of this process is: the gear box is placed on the ground, and the two ends of the main shaft assembly are respectively suspended by two manual hoists suspended on the hook of the crane. After centering, the shaft head of the main shaft assembly is pulled into the Tightening sleeve. First use two torque wrenches to cross symmetrically pre-tighten the bolts to a certain value less than the rated torque, then loosen the hook of the spindle assembly, and then use two sets of wrenches to further tighten the b...

AI Technical Summary

Problems solved by technology

[0003] Although the above method can connect the main shaft and the gearbox, there are many problems such as long operation time (about 390 minutes in total), low efficiency, high labor intensity, many operators, and uneven stress on the bolt group.

[0004] In order to solve these problems, some domestic wind power companies have developed a four-synchronous bolt fastening device, but its installation and disassembly are inconvenient, the auxiliary time is long, and the price is expensive

Images