Low-wind-speed wind generating set variable speed turning system and method

Abstract

The invention discloses a low-wind-speed wind generating set variable speed turning system. The low-wind-speed wind generating set variable speed turning system comprises a control mechanism, a motorand a hydraulic gearbox, wherein the motor and the hydraulic gearbox are connected with the control mechanism; the hydraulic gearbox comprises a low-gear gear set and a high-gear gear set which are connected with a motor output shaft, a gearbox output shaft is connected with a coupler brake disc, a normally closed hydraulic brake and a normally open hydraulic clutch are arranged between the low-gear gear set and the high-gear gear set, low-rotating-speed output and high-rotating-speed output switching can be achieved, the gearbox further comprises a rotating speed monitoring mechanism and a hydraulic pressure maintaining mechanism; the invention further discloses a low-wind-speed wind generating set variable speed turning method. Through ingenious design of the low-gear gear set and the high-gear gear set, and arrangement of the hydraulic brake and the hydraulic clutch, low-speed torque output and high-speed torque output can be effectively achieved, turning action under different rotating speed needs can be met, and through the rotating speed monitoring mechanism and the hydraulic pressure maintaining mechanism, safety and reliability of the turning system can be greatly improved.

Description

technical field [0001] The invention relates to the technical field of wind turbine cranking, in particular to a low-wind speed wind turbine variable speed cranking system and a cranking method. Background technique [0002] In recent years, as the single-unit capacity of megawatt-level wind turbines continues to increase and tends to be designed for ultra-low wind speed units, the diameter of the impellers continues to increase. In addition, due to the complex terrain conditions, there are generally difficulties in the hoisting and subsequent maintenance of large-impeller units in the industry. question. For example, in the hoisting condition of the whole machine, the traditional hoisting scheme of the impeller held by the sling is no longer suitable for wind power projects with special terrain. This hoisting method needs to assemble the three blades and the hub on the ground, and then cooperate with the main crane and the auxiliary crane. Hold the roots of the two blades ...

AI Technical Summary

Problems solved by technology

This hoisting method requires a large working space on the ground, but such as mountainous, forested, and offshore projects have very little ground working space; land acquisition for machine positions is difficult and expensive; decentralized wind power projects are mostly located in areas with more complex terrain such as southern mountains. This poses a more severe challenge to the lifting method of the impeller

[0003] In view of this situation, the research on the use of single-blade hoisting technology can effectively solve the problem of difficult hoisting of large impellers in complex and special terrain environments

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