TWI532923B - Blade pitch angle control mechanism - Google Patents

Description

Blade device angle passive control mechanism

The present invention relates to a horizontal axis wind turbine, and more particularly to a blade device angular passive control mechanism for controlling the blade device angle of a wind turbine.

The wind turbine is mainly composed of a wind turbine and a generator. The wind turbine is connected with the generator. The wind turbine is used to capture the wind and convert the wind energy into mechanical energy to drive the generator to generate electricity.

The wind turbine driven by the wind to drive the generator is mainly composed of a plurality of blades radiatingly disposed on the outer circumference of a hub, and the angle between the chord line of the blade and the wind direction is the angle of the device, and the device for changing the blade The angle can change the moment of the blade to be driven by the wind to reduce the torque of the hub; when the wind speed is high, the angle of the device can reduce the force of the wind on the blade, avoid the vibration or even damage of the blade, and increase the upper limit of the wind speed of the wind driven wind turbine; Increasing the angle of the device at low times can increase the force of the wind on the blade and reduce the minimum wind speed requirement for wind-driven wind turbine operation.

The control device for controlling the angle of the wind turbine blade device mainly comprises a wind speed monitor, a calculation unit and a plurality of actuators, wherein the wind speed monitor is used for monitoring the wind speed and transmitting the measured wind speed data to the calculation unit The calculation unit calculates the optimal device angle of the blade according to the wind speed data, and controls the operation of each of the brakes according to the control, and each of the actuators is respectively disposed at the hub of the wind turbine corresponding to each blade, and is used for respectively swaying the blades, respectively a motor and a transmission The motor is connected to the blade through the transmission structure, and the calculation unit controls the rotation of the motor, and controls the rotation direction and angle of the motor according to the calculated optimum blade angle of the blade, thereby changing the device angle of the blade.

The conventional control device is configured to dispose a plurality of raking blades of the damper blades on the hub of the wind turbine, so that each of the dampers respectively sway the blades, and since each of the dampers is composed of a motor and a transmission structure, The wind turbine is generally provided with at least three blades, and at least three actuators are required to set three blades to respectively respectively, which greatly increases the weight burden of the tower for setting the wind turbine, and the hub structure of the wind turbine. The strength must be greatly increased, and the weight burden of the tower and the structural strength of the tower are significantly increased.

In order to solve the problem that the conventional control device greatly increases the load on the wind turbine and the tower structure, the main object of the present invention is to provide a blade device angle passive control mechanism, which is capable of passively controlling the blade by acting on the wind of the blade of the wind turbine. angle.

A second object of the present invention is to provide a blade device angular passive control mechanism which, by means of a damping structure, stabilizes the rotation of the blade when the blade changes its angle of wind.

In order to meet the intended purpose, the present invention is a blade device angle passive control mechanism, comprising a fixing base and an actuator, wherein the fixing seat is connected with a hub of a wind turbine, and the actuator is connected to a blade of the wind turbine, The actuator is pivotally connected to the fixing base, and the device angle of the blade is changed accordingly; the inside of the fixing seat is provided with two cylinders in the axial direction, and each of the cylinders forms a symmetry centering on the axis of the fixing seat, and the fixing seat is internally provided Two guide rails, each of the guide rails and the axial direction of the fixed seat And forming a slope in the radial direction, and each of the guide rails is symmetric with respect to the axis of the fixing seat; The actuator is provided with a middle column, two cross bars, a connecting member and two spring plates in the fixing seat, and the cross bar is symmetrically arranged on the outer edge of the center column, and each of the cross bars respectively extends and respectively The guide rail is adjacent to one side of the hub of the wind turbine, and the connecting member is axially connected to the center pillar, and each of the springs is respectively an arc-shaped sheet body made of an elastic material, and each of the spring pieces is disposed on the outer periphery of the connecting member. The two sides of the reed are symmetrically centered on the connecting member, and each of the reeds respectively extends and hooks with each of the cylinders, so that each of the reeds provides an elastic force for the rotation of the actuator.

The blade device angle passive control mechanism as described above, wherein the fixing seat is internally provided with a damping structure, and the actuator is coupled to the damping structure by the engaging member for retarding the rotation of the actuator.

The blade device angle passive control mechanism as described above, wherein the connecting member is a tubular body, the damping structure is mainly composed of a central shaft, a plurality of fins and a liquid damping material, and the central shaft is disposed in the tubular interior of the connecting member And one end of the central shaft is axially connected to the fixing base, and each fin is radially disposed on an outer circumference of the central shaft, and the damping material is filled inside the connecting member.

The blade device angle passive control mechanism as described above, wherein the damping structure is a rotary damper.

The blade device angle passive control mechanism as described above, wherein the fixed seat system is mainly composed of a tubular member having one end portion sealed at one end, each of the cylinders being adjacent to an inner wall of the pipe member, and each of the cylinders One end is connected to the end.

The invention can passively control the device angle change of the blade when the wind speed rises and falls; the invention can further utilize a damping structure, so that when the blade rotates to change the angle of the device when the wind changes, the rotation of the blade is stable and does not generate an instant. A phenomenon of rapid action.

(10) ‧ ‧ fixed seat

(11) ‧‧‧Pipe fittings

(12) ‧ ‧ end

(14) ‧‧‧Cylinder

(15)‧‧‧ Guide rails

(20) ‧‧‧ actuator

(22)‧‧‧中柱

(23)‧‧‧ crossbar

(24)‧‧‧Connecting pieces

(25)‧‧‧Reed

(30) ‧‧‧damped construction

(32)‧‧‧Axis

(34)‧‧‧Fins

(36) ‧‧‧damping substances

The first figure is an exploded perspective view of the first embodiment of the present invention.

The second drawing is a schematic axial cross-sectional view of the first embodiment of the present invention.

The third figure is a 3-3 cross-sectional view of the second figure showing the relative configuration of the crossbar and the guide rail.

The fourth figure is a 4-4 cross-sectional view of the second figure showing the construction of the damping structure.

The fifth drawing is a schematic axial cross-sectional view of the second embodiment of the present invention.

As shown in the first figure, the first embodiment of the angular passive control mechanism of the blade device of the present invention comprises a fixing base (10) and an actuator (20), wherein the fixing seat (10) and the hub of the wind turbine (figure The actuator (20) is connected to a blade (not shown) of the wind turbine, and the fixing seat (10) is pivotally connected to the actuator (20), and the actuator (20) It is used to tilt the blade to rotate, thereby changing the device angle of the blade.

As shown in the first to fourth figures, the fixing base (10) is mainly composed of a tubular member (11) having a cylindrical body formed by one end portion (12) at one end, and the inside of the fixing base (10) is axially a second cylinder (14), each of the cylinders (14) being adjacent to an inner wall of the tubular member (11), one end of each of the cylinders (14) is in contact with the end portion (12), and each of the cylinders (14) The symmetry is centered on the axis of the fixing base (10), and two fixing rails (15) are disposed inside the fixing base (10), and two ends of the guiding rails (15) are respectively connected to the inner wall of the tubular member (11). Each of the guide rails (15) and the fixing base (10) are respectively inclined in an axial direction and a radial direction, and each of the guide rails (15) is symmetrical with each other according to an axial center of the fixing base (10).

The actuator (20) is provided with a middle column (22), two cross bars (23), a connecting member (24) and two spring plates (25) inside the fixing base (10), and the cross bar (23) The symmetry is divided into the diameter of the middle column (22) To the outer edges of the two ends, and each of the crossbars (23) respectively extends to a side of each of the guide rails (15) adjacent to the hub of the wind turbine, and the connecting member (24) is coupled to the center pillar (22) Each of the reeds (25) is a curved piece formed of an elastic material, and each of the reeds (25) is disposed on two sides of the outer periphery of the engaging member (24), and each of the reeds (25) is accordingly The engaging members (24) are symmetrically formed at the center, and each of the springs (25) respectively extends and hooks with each of the cylinders (14), so that each of the springs (25) provides an elastic force for the rotation of the actuator (20).

The inside of the fixing base (10) is further provided with a damping structure (30). The actuator (20) is engaged with the damping structure (30) by the connecting member (24), and the damping structure (30) is used for retarding the actuator. (20) rotating; the connecting member (24) is a tubular body, and the damping structure (30) is mainly composed of a central shaft (32), a plurality of fins (34) and a liquid damping substance (36), wherein the central axis (32) disposed in the tubular interior of the connecting member (24), and one end of the central shaft (32) is in contact with the end portion (12) of the fixing base (10), and each of the fins (34) is radially disposed on The outer circumference of the central shaft (32), the damping material (36) is filled inside the connecting member (24), according to which the damping material (36) is rotated when the actuator (20) rotates relative to the fixing base (10). The frictional force between the connecting member (24), the central shaft (32) and each of the fins (34) forms a damping effect of retarding the rotation of the actuator (20), and improves the operation of the blade changing device angle of the wind turbine stability.

When the wind speed rises, the rotational speed of the wind turbine increases, and the centrifugal force acting on the blades of the wind turbine increases, and the blade guides the actuator (20) to move away from the hub of the wind turbine. At this time, the actuator (20) each of the crossbars (23) slides along the inclined rails (15) toward the hub away from the wind turbine, thereby causing the actuator (20) to be received by each of the guide rails (15) Guided to bring the blade to rotate, and the device angle of the blade can be passively controlled as the wind rises, and the spring (25) is elastically deformed due to the rotation of the actuator (20), each of the springs The elastic stress generated by the sheet (25) and the damping effect of the damping structure (30) stabilize the operation of the blade changing device angle.

When the wind speed decreases, the rotational speed of the wind turbine decreases, and the centrifugal force acting on the blades of the wind turbine decreases, and the elastic stress generated by the elastic deformation of each of the reeds (25) causes the actuator (20) to rotate in the opposite direction. And the angle of the device that passively controls the blade can be increased as the wind is lowered, and each of the crossbars (23) of the actuator (20) is respectively inclined along each of the guide rails (15) toward the wind turbine The direction of the hub slides, and the action of the blade changing device angle is stabilized due to the damping effect of the damping structure (30).

The second embodiment of the present invention is based on the foregoing embodiment. The second embodiment is the same as the configuration of the first embodiment, and the detailed description is not repeated. As shown in the fifth embodiment, the second embodiment includes a fixing base (10) and An actuator (20), wherein the actuator (20) is provided with a center pillar (22), two crossbars (23), a connecting member (24) and a two-spring piece (25) inside the fixing base (10). The connecting member (24) is a rod-shaped body. The fixing base (10) is internally provided with a damping structure (30). The actuator (20) is coupled to the damping structure (30) by the connecting member (24). The damper structure (30) is a rotary damper for retarding the rotation of the engaging member (24). Since the rotary damper is a conventional component, the specific configuration of the rotary damper will not be described in detail.

According to the first invention, when the wind speed rises and falls, the angle of the device of the blade of the wind turbine is passively controlled, and the weight burden on the wind turbine is small due to the simplification of the wind turbine, and the structure of the wind turbine and the tower of the wind turbine is arranged. Further, the present invention has a small impact effect; further, the damper structure is such that when the blade rotates and changes the angle of the device when the wind changes, the rotation of the blade is stable, and no sudden rapid operation occurs, especially in a short time. Under the environmental conditions with large changes in lift and fall, the fatigue of the material is prevented from occurring due to the overshoot or drop of the device angle.

(10) ‧ ‧ fixed seat

(11) ‧‧‧Pipe fittings

(12) ‧ ‧ end

(14) ‧‧‧Cylinder

(15)‧‧‧ Guide rails

(20) ‧‧‧ actuator

(22)‧‧‧中柱

(23)‧‧‧ crossbar

(24)‧‧‧Connecting pieces

(25)‧‧‧Reed

(30) ‧‧‧damped construction

(32)‧‧‧Axis

(34)‧‧‧Fins

Claims (5)

A blade device angle passive control mechanism includes a fixed seat and an actuator, wherein the fixed seat is coupled to a hub of a wind turbine, the actuator is coupled to a blade of the wind turbine, and the actuator is pivotally coupled to the fixed seat According to this, the device angle of the blade is changed; the inside of the fixing seat is provided with two cylinders in the axial direction, and each of the cylinders is symmetrically formed according to the axis of the fixing seat, and two guiding rails are disposed inside the fixing seat, and the guiding rails and the guiding rails are respectively The axial direction and the radial direction of the fixing seat are respectively inclined, and each of the guiding rails is symmetric with respect to the axial center of the fixing seat; the actuator is provided with a center pillar, two crossbars, a connecting member and a double spring inside the fixing seat Each of the crossbars is symmetrically disposed on an outer edge of the center pillar, and each of the crossbars respectively extends to a side of each of the guide rails adjacent to the hub of the wind turbine, and the connecting member is coupled to the center pillar Each of the reeds is a curved piece formed of an elastic material, and each of the reeds is disposed on two sides of the outer periphery of the engaging member, and each of the reeds is symmetrically formed according to the connecting member, and each of the reeds respectively Extending and hooking with each of the cylinders, so that each of the reeds is provided Actuating the rotation actuator spring force. The blade device angle passive control mechanism according to claim 1, wherein the fixing seat is internally provided with a damping structure, and the actuator is coupled to the damping structure by the engaging member, and the damping structure is used for retarding the actuator. Turn. The blade device angle passive control mechanism according to claim 2, wherein the connecting member is a tubular body, and the damping structure is mainly composed of a middle shaft, a plurality of fins and a liquid damping material, wherein the central shaft is disposed on the The tubular inner portion of the connecting member is axially connected to the fixing seat, and the fins are radially disposed on the outer circumference of the central shaft, and the damping material is filled inside the connecting member. The blade device angle passive control mechanism according to claim 2, wherein the damping structure is a rotary damper. The blade device angle passive control mechanism according to claim 1, wherein the fixed seat is mainly composed of a tubular member having one end portion sealed at one end, and each of the cylinders is adjacent to an inner wall of the tubular member. And one end of each of the cylinders is in contact with the end.