Wind generating set and transmission device thereof

Abstract

The invention provides a wind generating set and a transmission device thereof. The transmission device comprises a transmission shaft system, a gear box and a generator, the front end of the transmission shaft system is connected to a hub of a wind wheel of the wind generating set, the input end of the gear box is connected with the rear end of the transmission shaft system, and the output end of the gear box is connected with the input end of a generator; and the transmission shaft system and the gear box share one bearing and / or the gear box and the generator share one bearing. The transmission shaft system and the gear box and / or the gear box and the generator are semi-integrated, that is, the transmission shaft system and the gear box share one bearing, and / or the gear box and the generator share one bearing, so that the compact structural layout is realized; the defects that an existing wind generating set is complex in structure, low in reliability and high in cost are effectively overcome; and meanwhile, the size of each part of units is reduced, the manufacturing and transportation cost is reduced, detachable maintenance is achieved, and the operation and maintenance risk is reduced.

Description

technical field [0001] The invention relates to the field of wind power generators, in particular to a wind power generator and a transmission device thereof. Background technique [0002] At present, there are three technical routes for the transmission system of wind turbines: 1), high-speed gearbox plus double-fed motor / squirrel-cage motor / high-speed permanent magnet motor, often called high-speed double-fed type / squirrel-cage asynchronous type / high-speed Permanent magnet synchronous model (or high-speed gearbox model); 2), low-speed permanent magnet generator / low-speed electric excitation generator without gearbox, often called direct drive permanent magnet synchronous model (or direct drive model) / direct-drive excitation synchronous model; 3), medium-speed gearbox plus medium-speed double-fed motor / medium-speed permanent magnet motor, often called medium-speed double-fed model / medium-speed permanent magnet synchronous model (or semi-direct drive model). The more main...

AI Technical Summary

Problems solved by technology

The transmission system of ordinary compact semi-direct drive units is mainly composed of low-speed shafting, couplings, medium-speed gearboxes and medium-speed permanent magnet motors. The gearbox of ordinary compact semi-direct drive units can save about 1 / 5 of the cost, but the medium-speed permanent magnet generator increases the cost by about 2 / 5 compared with the doubly-fed and squirrel-cage generator, and the cost of the coupling increases by about 3-4 times, so the overall cost is relatively high. There is no obvious advantage for the feeder model and the high-speed squirrel-cage model

The transmission system of the ultra-compact semi-direct drive unit is mainly composed of a medium-speed gearbox and a medium-speed permanent magnet, eliminating the need for low-speed shafting and couplings, highly integrating the main shaft bearing, gearbox and generator, and eliminating the need for a transmission system About 2 / 5 of the number of structural parts, the cost of this transmission system technology route has certain advantages in cost compared with direct drive and high-speed gearboxes, but this route is difficult to achieve disassembly maintenance, once a functional failure occurs, the tower needs to be removed as a whole Maintenance, after-sales risk is high

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