JPH07119616A - Wind power generation device - Google Patents

Abstract

PURPOSE:To surely prevent generation of burning in a roller for transmitting motive power of a friction transmission speed increaser. CONSTITUTION:This device is provided with an output detector 60 for detecting output of a generator 50; thermocouples 71, 72, 73, 74 and a temperature detecting device 79 for detecting temperature of respective rollers 23, 33 of a friction transmission speed increaser 20; a computer 80 for receiving respective detection data from the temperature detecting device 79 and the output detector 60 and when high temperature or overload is judged, outputting a specified signal so as to reduce the load; and a blade angle drive device 90 for receiving the signal from the computer 80 to changing-drive a blade pitch angle of a rotary blade 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wind turbine generator for transmitting the power of a rotating blade that receives wind power to a generator via a friction transmission gearbox, and a friction transmission gearbox burnout due to excessive torque. The present invention relates to means for preventing the occurrence of the above.

[0002]

2. Description of the Related Art FIG. 4 is a schematic view of a conventional wind turbine generator. The rotor blades 10 are rotated by the wind force, the rotation of the input shaft 21 is accelerated by the friction transmission gearbox 20, and the rotor of the generator 50 is driven by the output shaft 39 to generate electricity. The blade pitch angle of the rotor blade 10 is set so as to absorb the energy of normal wind to the maximum, but when the wind power is very large,
As a control means, an output detector 60 for detecting the output of the generator 50 and a signal from the output detector 60 are received in order to prevent burning or the like from occurring in the friction transmission gearbox 20 due to an excessive load. A calculator 80 for calculating whether or not it is provided, a blade angle drive device 90 for changing and driving the blade pitch angle of the rotary blade 10 according to a signal from the calculator 80, and the like are provided. The output detector 60 detects the voltage or current generated by the generator 50. The calculator 80 fetches the output detection data from the output detector 60, compares it with the set value, and when it determines that the load is excessive, outputs a signal to the blade angle drive device 90. In response to this signal, the blade angle drive device 90 changes the blade pitch angle of the rotary blade 10 in the torque decreasing direction. When the blade pitch angle is reduced, the absorption of wind energy by the rotor blades 10 is reduced, an excessive load is avoided, and the friction transmission speed increaser 20 is prevented from burning.

[0003]

Although the conventional wind turbine generator is as described above, when the speed increasing gear 20 is a friction transmission speed increasing gear, the torque or the output P increases as shown in FIG. Accordingly, the slip s of the roller that transmits the power in the friction transmission speed increaser 20 increases. However, when the output P1 of a certain large torque is exceeded, for example, the slip s is changed from s1 to s2 by only slightly increasing the output from Pg1 to Pg2.
To increase greatly. Therefore, the computing unit 80, which makes a determination based on the output detection value, uses the slip s1 of Pg1 in FIG.
Even when the slip s is large, the command signal value of the calculator 80 in FIG. 4 does not change so much even if the slip s2 is large. Blade angle drive device 90
Since the blade angle of the rotary blade 10 is insufficiently changed or the change is slow, the roller that transmits the power in the friction transmission speed increaser 20 may not be able to dissipate the frictional heat generation and may be burned. . Further, there is a problem in that the amount of heat dissipation varies depending on the temperature, and the rollers are apt to burn when the temperature is high.

The present invention has been made in order to solve the above problems, and provides a wind power generator capable of reliably preventing burnout or the like from occurring in a roller for transmitting power of a friction transmission gearbox. With the goal.

[0005]

A wind turbine generator according to the present invention includes an output detector for detecting the output of a generator, a temperature detector for detecting the temperature of a roller of a friction transmission gearbox, and this temperature detector. From the device and the output detector, each detection data is taken in, and when a predetermined calculation is performed and it is determined that the temperature is high or an overload, a calculation unit that outputs a predetermined signal to reduce the load, and this calculation unit And a blade angle drive device for changing and driving the blade pitch angle of the rotary blade.

[0006]

The output detector of the wind turbine generator according to the present invention detects the output of the generator. The temperature detecting device detects the temperature of the roller of the friction transmission gearbox. The calculator takes in each detection data from the temperature detection device and the output detector,
When a predetermined calculation is performed and it is determined that the temperature is high or overload, a predetermined signal is output to reduce the load. The blade angle drive device receives a signal from the arithmetic unit and changes and drives the blade pitch angle of the rotary blade. As described above, the arithmetic unit determines not only the overload from the output detection data of the generator but also the high temperature from the temperature detection data of the roller of the friction transmission gearbox,
Since the blade pitch angle of the rotor blades is changed to reduce the load, when the roller temperature of the friction transmission speed increaser is large or the temperature is high, the output of Regardless of this, since the blade pitch angle of the rotary blade is changed so as to reduce the load, accidents such as burnout of the rollers of the friction transmission gearbox are reliably prevented.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a wind turbine generator according to an embodiment of the present invention, (A) is a schematic vertical sectional view, and (B) is a first speed increaser.
FIG. 3C is a cross-sectional view of the step portion, and FIG. 6C is a cross-sectional view of the second step portion of the speed increaser. In FIG. 1, reference numeral 10 denotes a rotor blade that receives wind force and rotates, 20 denotes a friction transmission speed increaser that increases the rotational speed of the rotor blade 10, and 50 denotes an output shaft 39 of the friction transmission speed increaser 20 that is driven to generate electricity. Generator, 60 is an output detector for detecting the output of the generator 50, 79 is a temperature detector for detecting the temperature of each roller in the friction transmission speed increaser 20, and 80 is a temperature detector 79 and an output detector 60. An arithmetic unit which takes in each detection data from the above and performs a predetermined arithmetic operation to judge a high temperature or an overload and issues a command signal, and 90 changes and drives the blade pitch angle of the rotor blade 10 in accordance with the command signal from the arithmetic unit 80. It is a blade angle drive device.

As shown in FIG. 1, the rotary shaft of the rotary blade 10 serves as an input shaft 21 of the friction transmission gearbox 20 and enters the friction transmission gearbox 20, and the input shaft 21 is supported by a bearing 41. The first stage inner contact ring 22 is integrally or fixed so as to be rotationally driven. The four first inner parts are inscribed in the first stage inner ring 22.
Stage planet rollers 23 are rotatably supported by the respective first stage planetary shafts 24. Each first stage planetary shaft 24 is fixed to the casing 40. A first stage sun body wheel 25 is provided in the center so as to contact each first stage planetary roller 23,
The first-stage sun body wheel 25 is integrally or fixed to the second-stage planetary shaft (carrier) 34. Second stage planetary shaft (carrier) 3
4 rotatably supports the three second stage planetary rollers 33,
Each of the second-stage planetary rollers 33 is provided so as to be inscribed in the second-stage inner ring 32 which is a part of the casing 40 and circumscribe the second-stage sun body wheel 35. The second stage sun body 35 is supported by bearings 42 and exits the friction transmission gearbox 20 to become an output shaft 39. The output shaft 39 is connected to the rotor of the generator 50.

As shown in FIG. 1, a thermocouple 71 is embedded in the inner peripheral surface of the first-stage inner ring 22 in contact with the first-stage planetary roller 23, and the first-stage planetary roller of the first-stage sun body wheel 25 is embedded. The thermocouple 72 is embedded in the outer peripheral surface in contact with the second stage inner ring 32.
Of the second stage planetary roller 33, a thermocouple 73 is embedded in the inner peripheral surface in contact with the second stage planetary roller 33.
A thermocouple 74 is embedded in the outer peripheral surface in contact with. The thermocouples 71, 72, 73 and 74 may be provided one each or a plurality of each. The lead wire of the thermocouple 71 is connected to the slip ring 75 provided on the input shaft 21, and the lead wire of the thermocouple 72 is the slip ring 76 provided on the first stage solar body 25.
And the lead wire of the thermocouple 74 is connected to the second stage solar body 3
5 is connected to the slip ring 77.
The contacts of the slip rings 75, 76 and 77 and the lead wires of the thermocouple 73 are connected to the input terminals of the temperature detector 79.

As shown in FIG. 1, the input terminal of the output detector 60 is connected so as to detect the voltage or current value of the generator 50. The output terminals of the output detector 60 and the temperature detector 79 are connected to the input terminals of the calculator 80. The output terminal of the calculator 80 is connected to the input terminal of the blade angle drive device 90.

Next, the operation of the embodiment shown in FIG. 1 will be described. When the wind blows, the rotor 10 absorbs the energy of the wind and rotates. If the rotary blade 10 rotates, the input shaft 21
The first-stage inner ring 22 is rotated through the
Drives the first-stage planetary rollers 23 inscribed therein by frictional force. Each first stage planetary roller 23 is a casing 4
Since it is rotatably supported by the first stage planetary shafts 24 fixed to 0, each first stage planetary roller 23 does not revolve but only rotates. When each first stage planetary roller 23 rotates, each first stage planetary roller 23 circumscribes the first stage solar body 2
5 is rotationally driven by frictional force. When the first stage sun body wheel 25 rotates, the second stage planetary shaft (carrier) 34 integrated with the first stage sun body wheel 25 rotates, and the second stage planetary shafts (carriers) 34 are connected to the respective second stage sun shafts. The planetary roller 33 is revolved. Since each second-stage planetary roller 33 is in contact with the second-stage inner ring 32 that is a part of the casing 40, each second-stage planetary roller 33 is connected to the second-stage inner ring 32 along with the revolution. It is rotated by the frictional force between them. By the revolution and rotation of each second stage planetary roller 33, each second stage planetary roller 33 rotationally drives the second stage sun body wheel 35 in contact with it by a frictional force. When the second stage sun body wheel 35 rotates, the rotor of the generator 50 is rotationally driven by the output shaft 39, and the generator 50 generates power. The rotation of the input shaft 21 is increased at each stage in the friction transmission speed increaser 20, and the rotation of the output shaft 39 becomes a considerable number of rotations, so that the small generator can effectively generate electric power.

In FIG. 1, the blade pitch angle of the rotary blade 10 is set so as to absorb the wind energy to the maximum up to a predetermined wind force. However, wind power can fluctuate depending on weather conditions and can be very large at times.
The large torque and rotation speed may cause excessive frictional heat generation in the planetary rollers 23 or 33, resulting in an accident such as burnout. To prevent such accidents,
When the wind power exceeds a predetermined value, control devices such as the output detector 60, the temperature detector 79, the calculator 80, and the blade angle drive device 90 operate to change the blade pitch angle of the rotary blade 10 toward the load reduction. To prevent the transmitted power from exceeding,
The details will be described below.

In FIG. 1, the output detector 60 is a generator 5
The voltage or current value generated by 0 is detected and A / D converted to output detection data. The temperature detector 79 is a thermocouple 7.
The electromotive force generated by 1, 72, 73 and 74 depending on the temperature is taken in through slip rings 75, 76 and 77 and A / D converted to obtain temperature detection data at each detection point.
When the computing unit 80 fetches the output detection data from the output detector 60, fetches the temperature detection data of each detection point from the temperature detector 79, performs predetermined information processing, and determines that it is in a high temperature or overload state. Sends a blade angle change signal to the blade angle drive device 90. The blade angle drive device 90 drives the rotor blade 10 so as to change the blade pitch angle according to a command signal from the calculator 80.

Next, the operation of the arithmetic unit 80 will be described with reference to FIG. The calculator 80 first takes in the temperature set value Tset, and from the temperature detector 79, the temperature detection values T1 to T of the respective detection points.
Take n. The temperature set value Tset is a temperature set lower than the temperature at which the planetary rollers 23 or 33 in FIG. Next, the temperature detection values T1 to Tn at the respective detection points are sequentially compared with the temperature setting value Tset, and when each temperature detection value T1 to Tn is equal to or higher than the temperature setting value Tset, a predetermined blade angle is set. The decrease signal is transmitted to the blade angle drive device 90. The predetermined blade angle reduction signal is a signal that changes the blade pitch angle in a direction in which the load decreases by a predetermined amount from the steady blade angle. At this time, it is shown that the temperature of the planetary rollers 23 or 33 has risen to some extent, and since the temperature rise due to frictional heat generation is rapid, the blade angle reduction is set to be performed fairly quickly and with a large reduction amount. Good to do.

Next, referring to FIG. 2, each temperature detection value T1.about.
When all Tn have not reached the temperature set value Tset, the calculator 80 takes in the output set value Pset and the output detected value Pg, compares the output detected value Pg with the output set value Pset, and sets the output detected value Pg as the output set value. When it is smaller than the value Pset, a signal is sent to the blade angle drive unit 90 so that the blade angle is in a steady state. When the output detection value Pg is equal to or greater than the output set value Pset, the output excess value Pd is calculated, and a blade angle reduction signal determined corresponding to the value of the output excess value Pd is sent to the blade angle drive device 90. The arithmetic unit 80 repeats the above operation,
Always monitor whether the temperature of any of the rollers does not exceed the set value or the output does not exceed the set value, and if either of them exceeds the set value, decrease the blade angle of the rotary blade 10. Reduce the torque or output, and prevent accidents such as roller burnout.

In FIG. 1, thermocouples 71, 72,
Instead of 73 and 74, for example, a temperature sensor using the change in electric resistance depending on temperature may be used. Further, these temperature sensors are provided to detect the temperature states of the planetary rollers 23 and 33. However, since the planetary rollers 23 and 33 are rubber-like materials that are easily elastically deformed, the temperature of the thermocouple or the like is reduced. Since it is difficult to mount the sensor, the planetary rollers 23 and 33 come into contact with the contact surfaces of the first stage inner ring 22, the first stage sun body wheel 25, the second stage inner ring 32 and the second stage sun body 35. It is embedded and provided. However, it is desirable that these temperature sensors can directly detect the temperature states of the planetary rollers 23 and 33 if they can be embedded in the outer peripheral surfaces of the planetary rollers 23 and 33.

In FIG. 2, the temperature detection values T1 to T
When any of n becomes equal to or higher than the temperature set value Tset, the predetermined blade angle decrease signal is output, but the detected temperature value T1
Calculate the excess amount from the temperature set value Tset of ~ Tn,
A blade angle reduction signal having a magnitude determined according to the excess amount may be output. Further, when the output detection value Pg becomes equal to or larger than the output set value Pset, a predetermined blade angle decrease signal may be output without calculating the excess amount.

Although the friction transmission speed increaser 20 in the above embodiment is of the two-stage planetary roller speed increasing type, even if the friction transmission speed increasing device 20 is a friction transmission speed increaser of any other type, the above-described operation is performed. With the same configuration as the example, it is possible to reliably prevent accidents such as roller burnout due to frictional heat generation.

The temperature of the roller of the friction transmission gearbox 20 is greatly affected by the ambient temperature, direct sunlight, etc., and if the temperature is high, burnout occurs regardless of the reason. By detecting the above, it is possible to control the blade angle of the rotary blade by taking these effects into account, and to reliably prevent accidents such as burnout of the roller, and obtain an effect that cannot be obtained by the conventional means.

[0020]

As described above, according to the present invention, in addition to detecting the output of the generator by the output detector and reducing the blade angle of the rotor blade when the output exceeds the output, a temperature detector is provided. The temperature of the friction transmission gearbox roller is detected, and when the temperature rises, the blade angle of the rotor blade is reduced.
Accidents such as roller burnout can be reliably prevented.

[Brief description of drawings]

1 shows a wind turbine generator according to an embodiment of the present invention, (A) is a schematic vertical sectional view, (B) is a lateral sectional view of a first step portion of a friction transmission gearbox, and (C) is a sectional view. Second of friction transmission gearbox
It is a cross-sectional view of a step.

FIG. 2 is an operation flow chart of an arithmetic unit of the wind turbine generator according to the embodiment of the present invention.

FIG. 3 is a diagram showing a relationship between a generator output and a slip of a friction transmission speed increaser.

FIG. 4 is a schematic vertical sectional view of a conventional wind turbine generator.

[Explanation of symbols]

10: Rotor blade, 20: Friction transmission gearbox, 21: Input shaft,
22: first stage inner ring, 23: first stage planetary roller, 2
5: 1st stage solar body wheel, 32: 2nd stage inner ring, 33: 2nd stage planetary roller, 35: 2nd stage solar body wheel, 39: output shaft, 50: generator, 60: output detector , 71, 72, 7
3, 74: thermocouple, 75, 76, 77: slip ring, 79: temperature detector, 80: calculator, 90: blade angle drive device.

Claims (3)

[Claims] 1. In a wind turbine generator for transmitting power of a rotor blade rotated by wind power to a generator via a friction transmission speed increaser to generate electric power, an output detector for detecting an output of the generator, and the friction. A temperature detection device that detects the temperature of the roller of the transmission gearbox, and load the detected data from this temperature detection device and the output detector, and load it when it is determined to be high temperature or overload by performing a predetermined calculation. A wind power generator comprising: a calculator that outputs a predetermined signal so as to reduce power consumption; and a blade angle drive device that receives the signal from the calculator and changes and drives the blade pitch angle of the rotor blades. . 2. In a wind turbine generator for transmitting power of a rotor blade rotated by wind force to a generator via a friction transmission speed increaser to generate electric power, an output detector for detecting an output of the generator, and the friction. A temperature detecting device for detecting the temperature of the roller of the transmission gearbox, and each detection data is taken in from this temperature detecting device and the output detector, and each detection data is compared with each set value to indicate high temperature or overload. When it is determined that the load is reduced, a computing unit that outputs a predetermined signal to reduce the load, and a blade angle driving device that receives the signal from the computing unit and changes and drives the blade pitch angle of the rotary blade are provided. A characteristic wind power generator. 3. A wind power generator that transmits the power of a rotor rotating by wind force to a generator via a friction transmission speed increaser to generate electric power, and an output detector for detecting the output of the generator, and the friction. A temperature detection device that detects the temperature of the roller of the transmission gearbox, and first, when detecting data from this temperature detection device and determining that the temperature is high, output a predetermined signal to reduce the load, and then An arithmetic unit that outputs a predetermined signal so as to reduce the load when it is determined that an overload is obtained by taking in the detection data from the output detector, and a blade of a rotary blade that receives each of the signals from the arithmetic unit. A wind turbine generator, comprising: a blade angle drive device for changing and driving a pitch angle.