Novel full-hydraulic wind power system

Abstract

The invention relates to the technical field of wind generator sets, in particular to a novel full-hydraulic wind power system comprising an oil tank, a wind turbine, a turbine rotating shaft, a speed and torque sensor, a single-input double-output gearbox, a first clutch, a second clutch, a large-displacement quantitative hydraulic pump, a small-displacement quantitative hydraulic pump, a first variable displacement motor, a second variable displacement motor, a third variable displacement motor, a fourth variable displacement motor, a first reversing valve, a second reversing valve, a third reversing valve, a fourth reversing valve, a fifth reversing valve, a first overflow valve, a second overflow valve, a third overflow valve, a first accumulator, a second accumulator, a first pressure gauge, a pressure gauge switch, a second pressure gauge, a pressure gauge switch, a first one-way valve, a second one-way valve, a third one-way valve, a fourth one-way valve, a fifth one-way valve, an oil supplement pump, a motor, a suction oil filter, a precision oil filter, a first oil filter, a second oil filter, a first generator and a second generator. The novel full-hydraulic wind power system has the advantages of higher operating efficiency and higher stability.

Description

technical field [0001] The invention belongs to the technical field of wind power generation, and in particular relates to a novel fully hydraulic wind power generation system. Background technique [0002] At present, there are two types of mainstream large-scale wind turbines, namely: asynchronous variable-speed constant-frequency wind turbines with gearboxes, and direct-drive permanent magnet synchronous wind turbines. The first type of gearbox-type wind turbine is currently the most popular and most mature wind turbine, but there are many shortcomings: the failure rate of the core equipment gearbox is relatively high, and it is difficult to manufacture and install, and the cost is high. The connection equipment between the wind rotor and the generator is a rigid connection, and the impact generated by the wind rotor will be transmitted to the generator, resulting in low reliability of the unit and unstable system frequency, which cannot guarantee the quality of power gen...

AI Technical Summary

Problems solved by technology

The first type of gearbox-type wind turbine is currently the most popular and most mature wind turbine, but there are many disadvantages: the failure rate of the core equipment gearbox is relatively high, and it is difficult to manufacture and install, and the cost is high. The connection equipment between the wind rotor and the generator is a rigid connection, and the impact generated by the wind rotor will be transmitted to the generator, resulting in low reliability of the unit and unstable system frequency, which cannot guarantee the quality of power generation

[0003] However, the full-hydraulic wind turbines that have been researched or designed at home and abroad have a big defect that the work efficiency is not high. In addition to the mechanical loss, there are also volume loss and leakage loss. When the wind speed changes, the hydraulic system components such as: When pumps and motors deviate from their rated operating conditions, this loss will be more obvious, and the energy utilization rate will be low

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