Hydraulic yaw system
A yaw system and hydraulic technology, applied in wind power generation, wind turbines, machines/engines, etc., can solve problems such as large start-up impact, complex control, and complex structure of the yaw system, and achieve uniform load distribution on the yaw pinion, The effect of simple structure
Active Publication Date: 2014-01-08
BEIJING GOLDWIND SCI & CREATION WINDPOWER EQUIP CO LTD
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Problems solved by technology
[0005] In the yaw scheme of the prior art, there are problems such as large start-up shock, complex structure of the yaw system, and complicated control
Method used
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[0022] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
[0023] In the following, reference will be made to the attached figure 1 The hydraulic yaw system 100 according to the embodiment of the present invention will be described in detail.
[0024] Such as figure 1 As shown in , the hydraulic yaw system 100 includes: a hydraulic pump 10, which is connected with a hydraulic source to provide power for each hydraulic actuator in the entire hydraulic yaw system; a first group of hydraulic motors 40 and a second group of hydraulic motors 50; two The four-position solenoid valve 60 includes a first port 1 and a second port 2 on one side and a third port 3 and a fourth port 4 on the second side, and the first group of hydraulic motors 40 are connected in parallel to the first port 1 Between the second port 2 and the second group of hydraulic motors 50 are connected in parallel between the third port 3 and ...
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The invention discloses a hydraulic yaw system which comprises a hydraulic pump, a first set of hydraulic executive components, a second set of hydraulic executive components, a two-position four-way solenoid valve and a three-position four-way electro-hydraulic proportional valve. Each hydraulic executive component is connected with a gear driving a yaw bearing. The two-position four-way solenoid valve comprises a first connector, a second connector, a third connector and a fourth connector, the first set of hydraulic executive components is connected between the first connector and the second connector in parallel, and the second set of hydraulic executive components is connected between the third connector and the fourth connector in parallel. The three-position four-way electro-hydraulic proportional valve is connected with the first set of hydraulic executive components in parallel and connected with the hydraulic pump, the first set of hydraulic executive components provides yaw torque, and the two-position four-way solenoid valve controls the rotation direction of the second set of hydraulic executive components so that the second set of hydraulic executive components can provide yaw torque or brake torque. The hydraulic yaw system has the characteristic of soft starting, is simple in structure, small in yaw and even in load distribution of yaw small pinions and enables the yaw action to be performed stably.
Description
technical field [0001] The invention relates to the field of wind power generators, and more specifically, relates to a hydraulic yaw system for wind power generators. Background technique [0002] For a wind generator, only when the impeller is in a windward state, that is, when the impeller is perpendicular to the wind direction, the wind generator can generate electricity normally. However, the wind force and direction of the natural wind field will change at any time, so the wind generator also needs to change accordingly in order to work normally. For this reason, a yaw system needs to be installed on the wind turbine so that the impeller of the wind turbine is always in a windward attitude. Generally speaking, the wind generator realizes the yaw control of the wind generator by driving the rotation of the yaw bearing gear. [0003] Patent document CN103047082A discloses a hydraulic yaw system for a wind power generating set and a control method thereof. It sets mult...
Claims
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Login to View More IPC IPC(8): F03D7/00
CPCY02E10/723Y02E10/72
Inventor 方振江
Owner BEIJING GOLDWIND SCI & CREATION WINDPOWER EQUIP CO LTD