Rotating speed detection device and method for low-speed side of wind driven generator

Abstract

The invention relates to a rotating speed detection device and method for a low-speed side of a wind driven generator, the wind driven generator comprises the low-speed side and a high-speed side, the low-speed side comprises blades and a main shaft, the high-speed side comprises a coupler and a generator, and the main shaft is connected with the coupler through a gearbox. And the rotating speed detection device comprises an outer gear ring fixed on the main shaft, a speed increaser connected with the outer gear ring and an encoder connected with the output end of the speed increaser. When a transmission chain (including a main shaft, a gear box and a coupler) goes wrong, the fault that the high-speed rotating speed difference and the low-speed rotating speed difference are not matched can be reported in time, the detection device is high in precision, the high-speed rotating speed difference and the low-speed rotating speed difference of the wind driven generator can be synchronously detected, and tiny slippage can also be synchronously detected.

Description

technical field [0001] The invention relates to the technical field of wind power generation, in particular to a high-precision rotational speed detection device and method for the low-speed side of a wind power generator. Background technique [0002] Wind energy is a clean and pollution-free renewable energy source. It has been used by people for a long time, mainly through windmills to pump water and grind flour. With the exhaustion of petroleum energy, wind energy has become one of the new energy sources explored by humans. One of The method is wind power. Convert the kinetic energy of the wind into mechanical kinetic energy, and then convert the mechanical energy into electrical kinetic energy, which is wind power generation. The principle of wind power generation is to use the wind to drive the blades of the windmill to rotate, and then increase the speed of rotation through the speed increaser to drive the generator to generate electricity. In order to ensure that t...

AI Technical Summary

Problems solved by technology

The defects of this method mainly include the following points: 1. The speed of the low-speed side cannot be detected after the spindle has a problem; 2. Due to the limitation of the number of expansion ring bolts, the speed accuracy is generally below 9°; 3. The speed accuracy of the low-speed side is insufficient, resulting in joint Part of the small slippage of the shaft device cannot be detected

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