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Braking hydraulic system of wind driven generator and wind driven generator

A technology of wind power generator and hydraulic system, which is applied in the direction of wind power generator, control of wind power generator, wind power generation, etc. It can solve the problems of pressure shock and reduce the gear life of speed increaser, etc.

Active Publication Date: 2016-02-03
SANY ELECTRIC CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of this, the present invention proposes a brake hydraulic system of a wind power generator and a wind power generator to solve the large pressure shock caused by the excessive braking speed of the main shaft during the braking process, which reduces the life of the gear of the speed increaser question

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  • Braking hydraulic system of wind driven generator and wind driven generator
  • Braking hydraulic system of wind driven generator and wind driven generator

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Embodiment Construction

[0023] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0024] The main shaft brake hydraulic oil circuit of the present invention is a hydraulic system that supplies pressure oil to the main shaft brake, and brakes the main shaft in the wind power generating set to brake the wind wheel or the generator. The main shaft brake is generally installed on the high-speed shaft or the low-speed shaft. The high-speed shaft is connected to the generator, and the low-speed shaft is connected to the wind wheel.

[0025] The yaw brake hydraulic oil circuit of the present invention is a hydraulic system that supplies pressure oil to the yaw brake. When the nacelle is in the correct position and the wind direction remains unchanged, it provides the necessary lockin...

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Abstract

The invention discloses a braking hydraulic system of a wind driven generator. The braking hydraulic system comprises a controller and a spindle rotating speed sensor for detecting a rotating speed of a spindle as well as a spindle braking hydraulic oil-way; a second electric proportional pressure reducing valve, a first reversing valve and a spindle brake are arranged in the spindle braking hydraulic oil-way; the first reversing valve is arranged in the oil-way between the second electric proportional pressure reducing valve and the spindle brake; a second pressure sensor is arranged in the oil-way between the first reversing valve and the spindle brake; the controller regulates a pressure of an outlet of the second electric proportional pressure reducing valve according to a signal of the second pressure sensor and a signal of a spindle rotating speed sensor so that a product of an output pressure of the second electric proportional pressure reducing valve and a spindle rotating speed is constant. The invention further provides the wind driven generator; constant-power braking of the spindle brake is realized; the spindle is braked stably and pressure impact is reduced; as a result, the damage of a booster engine gear in the wind driven generator unit is avoided and the service life of the booster engine gear is prolonged.

Description

technical field [0001] The invention relates to the field of wind power generation, in particular to a brake hydraulic system of a wind power generator and a wind power generator. Background technique [0002] The main equipment for wind power generation is wind turbines. From the perspective of energy conversion, a wind turbine consists of two parts: one is the wind wheel, which is a device that converts wind energy into mechanical energy; the other is a generator, which converts mechanical energy into electrical energy. Wind turbines are generally composed of main components such as wind rotors, speed-increasing gearboxes, generators, yaw systems, pitch systems, and control systems. The wind acts on the blades of the wind rotor at a certain speed and angle of attack, causing the blades to generate rotational torque and rotate, converting wind energy into mechanical energy, which is driven by a speed increaser and connected to the power grid. The yaw system is also called...

Claims

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Application Information

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IPC IPC(8): F03D7/00
CPCY02E10/72
Inventor 易小刚
Owner SANY ELECTRIC CO LTD
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