JP4516321B2 - Marine straight wing vertical axis wind power generator - Google Patents

Description

  The present invention relates to a marine linear blade vertical axis wind power generator, and more particularly to a marine linear blade vertical axis wind power generator that can prevent damage to a windmill when a ship is shaken.

Conventionally, a wind turbine generator using a straight blade vertical axis type windmill is generally known.
Japanese Patent No. 3368537

  The conventional straight blade vertical axis type wind power generator is designed on the assumption that the windmill is installed on the ground. Therefore, when this is applied to a ship, an unreasonable force is applied to the windmill. May be damaged.

  That is, since the wind turbine in the conventional wind turbine generator is designed on the assumption that the rotation axis is vertical, the rotor arm can withstand the centrifugal force when the blade rotates and transmit the torque to the rotation shaft. In order to reduce the air resistance during rotation, a thin airfoil is adopted for the cross-sectional shape.

  However, in the case of a wind turbine generator mounted on a ship, a gyro moment acts on the windmill due to the shaking of the ship, so that a bending moment may act on the rotor arm and the windmill may be damaged.

  As a method for preventing this, it is conceivable to reduce the diameter of the windmill and increase the number of rotor arms. However, these preventive measures have certain limitations because they all lead to a decrease in the function of the windmill.

  The present invention has been made in view of the present situation, and an object of the present invention is to provide a marine linear blade vertical axis wind power generator capable of preventing the windmill from being damaged while minimizing the deterioration of the function of the windmill. To do.

  Another object of the present invention is to provide a marine linear blade vertical axis wind power generator capable of preventing damage to a windmill even when a gust of wind blows.

  Another object of the present invention is to provide a marine linear blade vertical axis wind power generator capable of improving power generation efficiency by efficiently rotating a windmill even in a weak wind.

  Another object of the present invention is to provide a marine linear blade vertical axis wind power generator that can be applied to an existing ship with a lighter weight by simplifying the device configuration.

  Still another object of the present invention is to provide a marine linear blade vertical axis wind power generator capable of improving the rigidity of a rotor arm to suppress an increase in the number of rotor arms, reducing the weight of a windmill and improving the power generation efficiency. In offer.

  In order to achieve the above object, the present invention provides a straight-blade vertical axis type windmill installed in a ship; power generation means driven by the rotation of the windmill; brake means for stopping the rotation of the windmill; , A sensor for detecting the angular velocity of the inclination of the rotating shaft of the windmill; an anemometer for detecting the wind speed; and a control means. The control means sets the sensor to a set value. The windmill is stopped when an angular velocity exceeding is detected.

  The present invention is also characterized in that the wind turbine is stopped when the anemometer detects a wind speed exceeding a set value by the control means.

  The present invention is also characterized in that the wind turbine is driven by the control means when the anemometer detects a wind speed exceeding a set value while the wind turbine is stopped.

  The present invention is also characterized in that the power generation means and the activation means are configured by a single device having a function switching mechanism.

  The present invention further includes a windmill, including a rotating shaft, a rotor arm extending in a radial direction from the rotating shaft, and a blade attached to a distal end portion of the rotor arm, the rotor arm having a main body portion having a rectangular cross section; It is characterized by comprising a tip part integrally formed on the rotating front end part of the main body part and having a circular arc shape and a rear end part integrally provided on the rear end part of the main body part and having a cross section spindle shape. And

  As described above, the present invention relates to a straight blade vertical axis type windmill installed in a ship; power generation means driven by the rotation of the windmill; brake means for stopping the rotation of the windmill; and a stopped windmill. A starting means for driving to a set rotational speed; a sensor for detecting an angular velocity of the inclination of the rotation axis of the windmill; an anemometer for detecting the wind speed; and a control means. Since the windmill is stopped when the angular velocity exceeding the limit is detected, it is possible to prevent the windmill from being damaged while minimizing the deterioration of the function of the windmill.

  In the present invention, since the wind turbine is stopped when the anemometer detects a wind speed exceeding the set value by the control means, even if a wind gust blows, damage to the wind turbine is caused in advance. Can be prevented.

  In the present invention, the wind turbine is driven by the control means when the anemometer detects a wind speed exceeding a set value while the wind turbine is stopped. Power generation efficiency can be improved by rotating well.

  In the present invention, since the power generation means and the start means are configured as a single device having a function switching mechanism, the device configuration is simplified to reduce the weight and can be easily applied to an existing ship. Can be.

  The present invention further includes a windmill, including a rotating shaft, a rotor arm extending in a radial direction from the rotating shaft, and a blade attached to a distal end portion of the rotor arm, the rotor arm having a main body portion having a rectangular cross section; Because it is configured with a tip part integrally formed at the rotating tip of the main body part and having a circular arc shape and a rear end part integrally provided at the rotating rear end part of the main body part and having a cross-sectional spindle shape, The rigidity of the rotor arm can be improved to suppress the increase in the number of rotor arms, the windmill can be reduced in weight, and the power generation efficiency can be improved.

The present invention will be described below with reference to the drawings.
FIG. 1 shows a marine linear blade vertical axis wind turbine generator according to an embodiment of the present invention. The wind turbine generator 1 includes a straight vane vertical axis wind turbine 2 installed on a marine vessel (not shown). The generator 3 is driven by the rotation of the windmill 2. The generator 3 can be used as a motor for starting the stopped windmill 2 by switching the internal mechanism. That is, the generator 3 serves as two means: a power generation means driven by the rotation of the windmill 2 and an activation means for driving the stopped windmill 2 to the set rotational speed.

  As shown in FIGS. 2 and 3, the windmill 2 includes a pair of left and right columns 5a erected on the hull 4, a top 5b connecting between the upper ends of both columns 5a, and a position near the lower ends of both columns 5a. A support frame 5 having a bottom member 5c for connecting between them and a support member 5d for supporting the column 5a is provided, and a windmill body 6 is rotatably supported in the support frame 5 The equipment part 7 is installed on the bottom material 5c. As shown in FIG. 1, a tachometer 9 for measuring the number of revolutions of the generator 3, the brake means 8 and the windmill body 6 is incorporated in the equipment unit 7. The measured values are sent to the control means 10 as control data.

In addition, as shown in FIG. 1, the control unit 10 is also configured to receive the measurement values from the wind direction / anemometer 11 and the gyro sensor 12 as control data, respectively. Based on these control data, the brake means 8 and the servo controller 13 are controlled to perform power generation control. This will be described in detail later.
In addition, in FIG. 1, the code | symbol 14 is a marine power supply of 3 phase AC200V, for example.

  As shown in FIGS. 2 and 3, the wind turbine main body 6 includes a rotating shaft 15 positioned at the center of rotation, a rotor arm 16 extending in the radial direction from the rotating shaft 15, and a blade attached to the tip of the rotor arm 16. 17, and the wind turbine body 6 always rotates in a constant direction with respect to the wind from any direction depending on the direction of the blade 17. In addition, since the rotation principle is a well-known technique in this type of wind turbine, detailed description thereof is omitted.

  As shown in FIG. 4, the rotor arm 16 includes a main body portion 16a having a box shape with a square cross section, a tip portion 16b having an arcuate cross section provided integrally with a rotating front end portion of the main body portion 16a, and a main body portion 16a. And a rear end portion 16c that is integrally provided at the rear end portion of the rotation and has a cross-sectional weight-proof shape, and is not a thin wing shape in cross section, and the main body portion 16a has a rectangular box shape in cross section. As a result, the yield strength against the external force in the bending direction applied to the rotor arm 16 can be greatly improved.

  As shown in FIGS. 5 and 6, the brake means 8 includes a disk 8a attached to the lower end of the rotary shaft 15 and, for example, pneumatically operated brake pads arranged at four locations around the disk 8a. As will be described in detail later, the brake means 8 is configured in such a manner that the rotating shaft 15 is inclined at an angular velocity exceeding a preset set value, or the wind direction / anemometer 11 is preset. It operates when the wind speed exceeding the set value is measured, and the rotating shaft 15 is forcibly stopped to prevent the wind turbine body 6 from being damaged.

  As shown in FIGS. 5 and 6, a large pulley 18 is attached to a position immediately above the disk 8 a of the rotating shaft 15, and this large pulley is attached to the input / output shaft 3 a of the generator 3. The small pulley 19 and the endless belt 20 are linked and connected. When the generator 3 is used as a power generation means, the large pulley 18 transmits power by transmitting the rotation of the rotary shaft 15 to the input / output shaft 3a of the power generator 3, and uses the power generator 3 as a starting means. When used, the rotation of the input / output shaft 3a is transmitted to the rotation shaft 15 so that the rotation shaft 15 can be driven.

FIG. 7 and FIG. 8 are flowcharts showing operations at the start and stop of automatic driving, respectively, and the operation of the present embodiment will be described below with reference to both flowcharts.
When starting the operation of the windmill 2, it is first determined in step S1 of FIG. 7 whether or not the wind speed is below an upper limit set value (for example, 25 m / sec). Specifically, the control means 10 shown in FIG. 1 takes in the measured value from the wind direction / anemometer 11 as control data, and compares this control data with the upper limit set value. When the wind speed is below the upper limit set value, the next step S2 is executed.

  In step S2, it is determined whether or not the angular velocity of the inclination of the rotating shaft 15 is below a set value (for example, 5 ° / sec). Specifically, the control means 10 shown in FIG. 1 takes the measurement value from the gyro sensor 12 as control data, and compares this control data with the set value. If the angular velocity of the inclination of the rotating shaft 15 is below the set value, the next step S3 is executed.

  In step S3, it is determined whether or not the wind speed is equal to or higher than a lower limit set value (for example, 5 m / sec). Specifically, the control means 10 shown in FIG. 1 takes in the measured value from the wind direction / anemometer 11 as control data, and compares this control data with the lower limit set value. If the wind speed is equal to or higher than the lower limit set value, the brake means 8 is turned off in step S4.

  At this time, if there is a sufficient wind speed, the wind turbine body 6 starts to rotate at a speed sufficient for power generation only by turning off the brake means 8, but the lower limit set value or a wind speed close to this is set. In this case, the windmill main body 6 does not rotate or rotates only at a very slow speed even if it rotates.

  Therefore, in the present embodiment, if the brake means 8 is turned off in step S4, it is determined in step S5 whether or not the windmill body 6 is rotating at a set rotational speed (for example, 53 rpm) or more. Specifically, the control means 10 shown in FIG. 1 takes the measurement value from the tachometer 9 as control data, and compares this control data with the set rotational speed. If the rotational speed of the rotary shaft 15 is below the set rotational speed, the rotary shaft 15 is forcibly rotated in step S6. Specifically, after the function of the generator 3 shown in FIG. 1 is switched to the motor side, the rotating shaft 15 is forcibly rotated using the generator 3.

  If the rotational speed of the rotary shaft 15 becomes equal to or higher than the set rotational speed due to the forced rotation, the forced rotation of the rotary shaft 15 is canceled in step S7. Specifically, the function of the generator 3 shown in FIG. 1 is switched to the generator side to perform wind power generation.

  On the other hand, when stopping the rotating windmill 2, it is first determined in step S11 in FIG. 8 whether or not the wind speed is equal to or higher than an upper limit set value. Specifically, the control means 10 shown in FIG. 1 takes in a measured value from the wind direction / anemometer 11 as control data, and compares this control data with the upper limit set value. When the wind speed is below the upper limit value, the next step S12 is executed.

  In step S12, it is determined whether or not the angular velocity of the inclination of the rotating shaft 15 is greater than or equal to a set value. Specifically, the control means 10 shown in FIG. 1 takes the measurement value from the gyro sensor 12 as control data, and compares this control data with the set value. If the angular velocity of the inclination of the rotation shaft 15 is below the set value, the next step S13 is executed.

  In step S13, it is determined whether or not the windmill 2 is stopped. If the windmill body 6 is rotating even if it is less than the provisional rotation speed, the process returns to step S11 to repeat the above determination.

  On the other hand, if the wind speed is greater than or equal to the upper limit set value in the determination in step S11, or if the angular velocity of the tilt of the rotating shaft 15 is greater than or equal to the set value in the determination in step S12, further in the determination in step S13. If it is found that the windmill 2 is stopped, the brake means 8 is turned on in step S14 to forcibly stop the windmill 2.

By the way, as one of the conditions for stopping the windmill 2, it is necessary to determine whether the angular velocity of the inclination of the rotating shaft 15 is equal to or higher than a set value for the following reason.
That is, in the state where the windmill body 6 is rotating, if the rotation shaft 15 is inclined slowly, there is no particular problem because the entire windmill body 6 is inclined without difficulty, but the rotation shaft 15 is at a rapid speed. When tilted, the blade 17 tends to tilt in a direction different from the direction in which the rotating shaft 15 tilts due to the law of inertia, so that a large bending stress acts on the rotor arm 16 and the rotor arm 16 is damaged. This is because there is a risk of deformation.

  Thus, the wind turbine 2 is forcibly stopped not only when the wind speed exceeds the upper limit setting value but also when the angular velocity of the inclination of the rotary shaft 15 exceeds the set value. 2 damage can be prevented.

  As described above, the marine linear blade vertical axis wind power generator according to the present invention is useful as a wind power generator mounted on a ship, and in particular can prevent damage to the windmill when the ship is shaken. Suitable as a wind power generator.

1 is an overall configuration diagram showing a marine linear blade vertical axis wind power generator according to an embodiment of the present invention. It is detail drawing of the windmill shown in FIG. FIG. 3 is a right side view of FIG. 2. FIG. 3 is an enlarged cross-sectional view of the rotor arm shown in FIG. 2. FIG. 3 is a detailed view showing an internal structure of the device unit in FIG. 2. FIG. 6 is a plan view of FIG. 5. It is a flowchart which shows the operation | movement at the time of an automatic driving | operation start. It is a flowchart which shows the operation | movement at the time of an automatic driving | operation stop.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Wind power generator 2 Windmill 3 Generator 3a Input / output shaft 4 Hull 5 Support frame 6 Windmill main body 7 Equipment part 8 Brake means 9 Tachometer 10 Control means 11 Wind direction and anemometer 12 Gyro sensor 13 Servo controller 14 Marine power supply 15 Rotating shaft 16 Rotor arm 16a Main body portion 16b Front end portion 16c Rear end portion 17 Blade 18 Large pulley 19 Small pulley 20 Endless belt

Claims (5)

  A straight blade vertical axis type windmill installed in a ship; power generation means driven by rotation of the windmill; brake means for stopping the rotation of the windmill; start means for driving the stopped windmill to a set rotational speed; A sensor for detecting an angular velocity of the rotation axis of the windmill; an anemometer for detecting the wind speed; and a control means. The control means detects the windmill when the sensor detects an angular speed exceeding a set value. A marine linear blade vertical axis wind power generator characterized by being stopped.   The marine linear blade vertical wind power generator according to claim 1, wherein the control means stops the wind turbine when the anemometer detects a wind speed exceeding a set value.   3. The marine linear blade vertical axis wind power generator according to claim 1, wherein the control means drives the windmill when the anemometer detects a wind speed exceeding a set value while the windmill is stopped. 4. .   4. A marine linear blade vertical axis wind power generator according to claim 1, wherein the power generating means and the starting means are constituted by a single device having a function switching mechanism.   The windmill includes a rotating shaft, a rotor arm extending in a radial direction from the rotating shaft, and a blade attached to a tip portion of the rotor arm. The rotor arm includes a main body portion having a rectangular cross section, and a rotating tip of the main body portion. And a rear end portion integrally formed at a rotating rear end portion of the main body portion and having a cross-sectional spindle shape. , 3 or 4, the marine linear blade vertical axis wind power generator.

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