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Wind-power generation device
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A technology for wind power generation devices and windmills, which is applied to wind turbine components, wind energy power generation, wind turbines, etc., can solve problems such as burning and sticking of sliding surfaces and dissatisfaction of working oil.
Inactive Publication Date: 2011-02-23
MITSUBISHI HEAVY IND LTD
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Problems solved by technology
[0004] In addition, when the hydraulic pump is started, since the working oil in the pump is usually not full, there may be problems such as burning of the sliding surface during continuous operation with the start of work.
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no. 1 Embodiment approach
[0047] figure 1 The pitch control device 10 of the blade 5 is shown as an example of a schematic configuration around the oil supply pump. This pitch control device 10 is capable of hydraulically controlling the pitch angles of the three blades 5 attached to the rotor head 4 individually.
[0048] exist figure 1 Among them, the symbol 11 in the figure is an oil tank for storing hydraulic working oil, 12 is a hydraulic pump driven by a motor 13, 14 is a servo valve for switching the flow direction of oil pressure, and 15 is to change the pitch angle of the blade 5 16 is a safety valve, 17 is an emergency stop valve, 18 and 19 are accumulators, 20 is a non-return valve, and 21 is a filter. Each machine is connected by an oil pressure piping 22 to form a pitch control device 10.
[0049] The electric motor 13 is classified into a fixed capacity type and a variable capacity type. In this embodiment, a fixed capacity type electric motor 13 is used to drive a hydraulic pump 12 suc...
no. 2 Embodiment approach
[0069] figure 2 Main parts of a schematic configuration example around the oil supply pump of the pitch control device 10 are shown. In addition, the same code|symbol is attached|subjected to the same part as the above-mentioned embodiment, and the detailed description is abbreviate|omitted.
[0070] In this embodiment, there is a difference in that instead of the aforementioned pump slow action, a variable displacement hydraulic pump 12A is used as the oil supply pump, and the flow rate of the hydraulic working oil corresponding to the oil temperature is supplied to the hydraulic pump. Piping 22.
[0071] That is, the hydraulic pump 12A is, for example, a swash plate type pump of a variable discharge amount type in which the discharge amount is variable, and a control unit is provided in the controller 30B. At the restart, the flow rate of the hydraulic pump 12A is controlled so that the temperature of the hydraulic working oil rises to a predetermined value.
[0072] Acc...
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Abstract
Provided is a wind-power generation device with a countermeasure against the reduction in oil temperature which does not require a new large capacity power source. A wind-power generation device (1) with an oil pressure pomp (12) the operation of which is stopped at the time of the stop of a windmill comprises a bypass flow path (25) branched from an ejection side flow path of the oil pressure pomp (12) and connected to an oil tank (11), an electromagnetic valve (26) which is provided in the bypass flow path (25) and which opens at the time of the activation of the oil pressure pomp (12), a temperature sensor (31) for detecting the oil temperature of oil pressure operating oil, and a controller (30) for performing pomp inching after the activation of the oil pressure pomp (12) and raisingthe temperature of the oil pressure operating oil to a predetermined value.
Description
technical field [0001] The present invention relates to a wind power generator suitably installed in a cold place. Background technique [0002] In the prior art, a propeller-type windmill used in a wind power generation device is rotated by a plurality of blades (windmill blades) installed on the rotor head under the wind. After the rotation of the rotor head is accelerated by a speed increasing gear connected to the rotating shaft, the generator is driven to generate electricity. [0003] In such a wind power generator, pitch control of individually adjusting the pitch angle of each blade using oil pressure is performed to obtain a predetermined rotational speed and output according to wind conditions. In addition, with respect to the rotating / sliding parts such as the gear box and bearings constituting the wind power generator, lubricating oil is circulated by a pump to lubricate the target parts. [0004] In addition, when the hydraulic pump is started, since the worki...
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Application Information
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