Hydraulic transduction device for wind power generation

Abstract

The invention discloses a hydraulic transduction device for wind power generation. The front end of a hydraulic pump is connected with a wind-power rotating main shaft through a first coupling; the back end of a hydraulic motor is connected with a first generator through a second coupling; the hydraulic pump converts pulse-type kinetic energy generated by the wind-power rotating main shaft into hydraulic energy; the hydraulic energy is transmitted to the hydraulic motor through a hydraulic oil outlet pipeline; the hydraulic motor converts the hydraulic energy into constant kinetic energy output to the first generator; a hydraulic pressure protection device is connected with the hydraulic oil outlet pipeline and maintains the pressure constancy of hydraulic oil in the hydraulic oil outlet pipeline; and a hydraulic auxiliary unit is arranged on the hydraulic transduction device. The invention reduces the overall weight of wind power generation devices, greatly saves metal materials and investment in wind power generation equipment, and provides a transduction device which is more convenient, effective and friendly to environment.

Description

Technical field: [0001] The invention belongs to the field of wind power generation, and relates to a core technology of wind power generation, in particular to a hydraulic secondary conversion and speed regulation power generation technology. Background technique: [0002] At present, the existing wind power generation device is generally composed of components such as a wind wheel, a generator, a speed increaser, a steering device (tail), a tower, a speed limiting safety mechanism, and an energy storage device. Since the wind speed in nature is extremely unstable, the output power of wind turbines is also extremely unstable. Generally, the electric energy generated by wind turbines cannot be directly used on electrical appliances or transmitted to the power grid. The speed is constant and the investment in wind power generation equipment is reduced. Although pitch adjustment technology for wind turbines, AC excitation variable speed constant frequency double-fed generator ...

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Problems solved by technology

[0005] (2) The speed of the generator is unstable: since the speed increaser is a speed change mechanism with a fixed speed ratio, the speed increaser will amplify the influence of the pulsating wind speed on the speed of the generator, resulting in the constant speed of the generator. Changes that affect the quality of power generation

[0006] (3) The center of gravity of the wind power generation device is too high: the weight of the speed increaser in the wind power generation device is large, which directly affects the operation stability of the wind power generation device. Therefore, the size and weight of the tower of the existing wind power generation device are directly increased, resulting in unnecessary waste

[0007] Difficulties in installation and maintenance of existing wind power generation devices: in existing wind power generation devices, the generator and speed-increasing mechanism are installed on the top of the tower, and a large tower crane is required for installation, which greatly increases the installation of existing wind power generation devices. Cost; during maintenance and repair, maintenance personnel have to go to the top of the tower for repair and maintenance work, which increases the maintenance and repair cost of the existing wind power generation device

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