Wind turbine generator set overspeed control device

Abstract

The utility model belongs to the field of wind turbine generators, and particularly relates to an overspeed control device of a wind turbine generator. The wind turbine generator system comprises a wind turbine generator system body and a controller, a rotating speed sensor is installed on the wind turbine generator system body and used for detecting the rotating speed of a rotating shaft on the wind turbine generator system body, and a friction plate used for reducing the rotating speed of the rotating shaft is horizontally arranged over the rotating shaft. A height adjusting assembly used for adjusting the height of the friction plate is installed on the wind turbine generator body, a groove is formed in the center of the bottom of the friction plate, a pressure sensor is installed at the bottom of the groove, and an extrusion assembly used for extruding the pressure sensor is installed in the groove. The height adjusting assembly, the rotating speed sensor and the pressure sensor are electrically connected with the controller, and the controller is used for receiving and processing information transmitted by the pressure sensor and the rotating speed sensor and controlling starting and stopping of the height adjusting assembly. According to the utility model, the rotating speed of the rotating shaft is reduced, and the rotating speeds of the blades and the hub are also reduced while the rotating speed of the rotating shaft is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of wind turbine generator system, especially relates to a wind turbine generator system overspeed control device. BACKGROUND

[0002] In the continuous development of electric power, there are many power generation methods, and wind power generation is one of them. The power supply of wind power generation is composed of a wind turbine generator set, a tower supporting the generator set, a battery charging controller, an inverter, a load dump, a grid-connected controller, a battery pack and the like. The wind turbine generator set (wind turbine generator set) includes a wind wheel and a generator; the wind wheel includes blades, a hub, reinforcing members and the like. In order to make the generator generate electricity, the hub will be connected with the generator through a rotating shaft, so that when the wind blows the blades, the hub will rotate with the blades, and at the same time the hub drives the rotating shaft to rotate, which drives the generator to rotate and makes the generator generate electricity.

[0003] The existing wind turbine generator set will cause the blades, the hub and the rotating shaft to rotate at a high speed when the wind speed is too high, which will cause damage to the wind turbine generator set. Therefore, the wind turbine generator set overspeed control device is proposed to reduce the rotating speed of the rotating shaft when the wind turbine generator set rotates at a high speed. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a wind turbine generator set overspeed control device which can reduce the rotating speed of the rotating shaft when the wind turbine generator set rotates at a high speed.

[0005] The wind turbine generator set overspeed control device comprises a wind turbine generator set body and a controller, a rotating speed sensor is installed on the wind turbine generator set body, the rotating speed sensor is used for detecting the rotating speed of the rotating shaft on the wind turbine generator set body, a friction plate for reducing the rotating speed of the rotating shaft is horizontally arranged above the rotating shaft, a height adjusting assembly for adjusting the height of the friction plate is installed on the wind turbine generator set body, a groove is formed in the center of the bottom of the friction plate, a pressure sensor is installed at the bottom of the groove, an extrusion assembly for extruding the pressure sensor is installed in the groove, the height adjusting assembly, the rotating speed sensor and the pressure sensor are electrically connected with the controller, the controller is used for receiving and processing the information transmitted by the pressure sensor and the rotating speed sensor, and controlling the opening and closing of the height adjusting assembly.

[0006] Further, the height adjusting assembly comprises a groove body mounted on the top of the wind turbine body, the groove body is downwardly open, a lead screw is vertically arranged in the groove body, a servo motor for driving the lead screw to rotate is mounted on the groove bottom of the groove body, a sliding plate is sleeved on the lead screw and rotationally matched with the lead screw, a sliding groove for allowing the sliding plate to only slide up and down is formed in the left inner wall of the groove body, a through groove is formed in the right wall of the groove body and communicates between the inside and the outside, the right half of the sliding plate passes out of the groove body through the through groove, the sliding plate is in up-and-down sliding cooperation with the through groove, a connecting rod is vertically mounted on the right end of the bottom of the sliding plate, the lower end of the connecting rod is fixedly connected with the top of the friction plate, the servo motor is electrically connected with the controller, and the controller is used for controlling the opening and closing of the servo motor.

[0007] Further, the extrusion assembly comprises a friction block mounted in the groove, the friction block is in up-and-down sliding cooperation with the groove, the friction block is mounted in the groove bottom through two vertical springs, the two springs are distributed left and right, the pressure sensor is located between the two springs, when the springs are in the natural length, there is a gap between the pressure sensor and the friction block, and the lower end of the friction block passes out of the groove.

[0008] Further, the wind turbine body is provided with a protection box, the controller is mounted in the protection box, a storage is mounted in the protection box and used for storing data, and the storage is electrically connected with the controller.

[0009] Further, the protection box is provided with a built-in antenna for transmitting information, and the built-in antenna is electrically connected with the controller.

[0010] Further, the front wall of the groove body is provided with a heat dissipation opening, and a dustproof net is mounted in the heat dissipation opening.

[0011] Further, a maintenance opening is formed in the side wall of the protection box, and a protection door for sealing the maintenance opening is hinged in the maintenance opening.

[0012] Compared with the prior art, the utility model has the advantages of the following:

[0013] The utility model discloses, through servo motor drive lead screw rotates, make the sliding plate move down, the sliding plate drives the connecting rod and the friction plate and moves down, make the bottom of friction plate reach on the rotating shaft, reduce the rotating speed of rotating shaft, the rotating speed of rotating shaft reduces simultaneously, also can make the rotating speed of blade and wheel hub reduce. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the structural schematic diagram of the utility model;

[0015] Figure 2 It is Figure 1 It is the enlarged structural schematic diagram of A place;

[0016] Figure 3 It is Figure 1The enlarged structural schematic view at B;

[0017] Figure 4 For Figure 1 The structural schematic view of the front side;

[0018] Figure 5 The flowchart of the utility model;

[0019] The names of various components in the figure: 1, wind turbine body; 2, screw rod; 3, groove body; 4, servo motor; 5, sliding plate; 6, connecting rod; 7, friction plate; 8, rotational speed sensor; 9, mounting block; 10, controller; 11, protective box; 12, memory; 13, built-in antenna; 14, friction block; 15, spring; 16, pressure sensor; 17, fixed plate; 18, dust screen; 19, protective door. DETAILED DESCRIPTION

[0020] The utility model will be further described below by specific embodiments in combination with the drawings, but not used to limit the utility model, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the invention. EMBODIMENT

[0021] The wind turbine overspeed control device described in this embodiment comprises a wind turbine body 1 and a controller 10, a rotational speed sensor 8 is installed on the wind turbine body 1, the rotational speed sensor 8 is used to detect the rotational speed of the rotating shaft on the wind turbine body 1, as shown in Figure 1 and Figure 4 The mounting block 9 is horizontally arranged right below the rotating shaft of the wind turbine body 1, the left side wall of the mounting block 9 is installed on the wind turbine body 1, the rotational speed sensor 8 is installed on the top of the mounting block 9, and the rotational speed sensor 8 is located right below the rotating shaft of the wind turbine body 1.

[0022] In actual application, the rotational speed sensor 8 is a sensor that converts the rotational speed of a rotating object into an electric quantity output; the rotational speed sensor 8 belongs to an indirect measuring device; it can be manufactured by mechanical, electrical, magnetic, optical and hybrid methods; according to the different signal forms, the rotational speed sensor can be divided into analog and digital types; according to different detection methods, the rotational speed sensor 8 can be divided into magnetic sensitive type, laser type, magnetic electric type, capacitance type and variable magnetic resistance type; the rotational speed sensor 8 of this embodiment can adopt laser type.

[0023] The friction plate 7 for reducing the rotational speed of the rotating shaft is horizontally arranged right above the rotating shaft, as shown in Figure 1 and Figure 4 In actual application, the upper friction lines are opened at the bottom of the friction plate 7 to increase the friction force of the friction plate 7 on the rotating shaft of the wind turbine body 1 so that the friction plate 7 can better slow down the rotating shaft.

[0024] Further illustrate, as Figure 1 The top of the wind turbine body 1 is provided with a groove 3, the groove 3 is open downward, the inside of the groove 3 is vertically provided with a lead screw 2, the bottom of the groove 3 is provided with a servo motor 4 for driving the lead screw 2 to rotate, the lead screw 2 is sleeved with a sliding plate 5 which is in rotational cooperation with the lead screw 2, the left inner wall of the groove 3 is provided with a sliding groove for enabling the sliding plate 5 to slide up and down only, the right wall of the groove 3 is provided with a through groove which is in communication with the inside and outside, the right half of the sliding plate 5 passes through the through groove and out of the groove 3, the sliding plate 5 is in up and down sliding cooperation with the through groove, the right end of the bottom of the sliding plate 5 is vertically provided with a connecting rod 6, the lower end of the connecting rod 6 is fixedly connected with the top of a friction plate 7, the servo motor 4 is electrically connected with a controller 10, the controller 10 is used for controlling the opening and closing of the servo motor 4; the whole of this paragraph constitutes a height adjusting assembly for adjusting the height of the friction plate 7.

[0025] As shown in Figure 1 The right half of the sliding plate 5 is located directly above the rotating shaft, the motor shaft of the servo motor 4 is fixedly connected with the upper end of the lead screw 2 through a shaft coupling, the lower end of the connecting rod 6 is installed at the center position of the top of the friction plate 7, the left end of the sliding plate 5 is located in the sliding groove, the side wall of the sliding plate 5 is in close contact with the inner wall of the sliding groove, preventing the sliding plate 5 from shaking when sliding up and down; in actual application, the servo motor 4 is connected with the controller 10 through wires.

[0026] As shown in Figure 1 and Figure 3 The right inner wall of the groove 3 is horizontally provided with two fixed plates 17 which are distributed in an up and down manner, the through groove is located between the two fixed plates 17, the fixed plates 17 are both provided with through holes which are in communication with the up and down, the through holes are horizontally provided with bearings which are in communication with the up and down, the lower end of the lead screw 2 is sleeved in the inner ring of the bearing in the through hole of the lower fixed plate 17, the upper end of the lead screw 2 passes through the inner ring of the bearing in the through hole of the upper fixed plate 17, the side wall of the lead screw 2 is in interference fit with the inner wall of the inner ring of the bearing.

[0027] In actual application, the height adjusting assembly can also be composed of an electric push rod, an installation plate and an installation column, the installation column is vertically installed to the top of the wind turbine body 1, the installation plate is horizontally installed on the right wall of the installation column, the installation plate is located directly above the friction plate 7, the electric push rod is vertically installed at the bottom of the installation plate, the motor of the electric push rod is installed at the bottom of the installation plate, the push rod movable end of the electric push rod is fixedly connected with the top of the friction plate 7.

[0028] The center position of the bottom of the friction plate 7 is provided with a groove, the groove is provided with a pressure sensor 16 at the groove bottom, as shown in Figure 1 and Figure 2 The groove is located at the center position of the top of the friction plate 7, the pressure sensor 16 is located at the center position of the groove bottom.

[0029] In practical application, the pressure sensor 16 is a prior art, which is usually composed of a pressure sensitive element and a signal processing unit. According to different test pressure types, the pressure sensor 11 can be divided into a gauge pressure sensor, a differential pressure sensor and an absolute pressure sensor.

[0030] Further, as shown in Figure 1 and Figure 2 , the friction block 14 is installed in the groove and is in sliding cooperation with the groove in an up-down direction. The friction block 14 is installed in the groove bottom through two vertical springs 15, which are distributed in a left-right direction. The pressure sensor 16 is located between the two springs 15. When the spring 15 is in a natural length, there is a gap between the pressure sensor 16 and the friction block 14, and the lower end of the friction block 14 penetrates out of the groove. The whole text constitutes an extrusion assembly for extruding the pressure sensor 16.

[0031] As shown in Figure 1 and Figure 2 , the upper end of the spring 15 is installed in the groove bottom, and the lower end of the spring 15 is installed in the top of the friction block 14. In practical application, when the friction plate 7 is pressed against the rotating shaft to slow down the rotating shaft, the friction block 14 will be pressed back into the groove, and the top of the friction block 14 will be pressed onto the detection surface of the pressure sensor 16.

[0032] In practical application, the extrusion assembly can also be composed of a friction block and a spring. The spring is installed vertically between the groove bottom and the friction block. The upper end of the spring is installed at the center position of the groove bottom, and the lower end of the spring is installed at the center position of the top of the friction block. The pressure sensor is located in the interior of the spring.

[0033] The height adjusting assembly, the rotating speed sensor 8 and the pressure sensor 16 are respectively electrically connected with the controller 10. The controller 10 is used for receiving and processing the information transmitted by the pressure sensor 16 and the rotating speed sensor 8, and controlling the opening and closing of the height adjusting assembly. The height adjusting assembly, the rotating speed sensor 8 and the pressure sensor 16 are respectively connected with the controller 10 through wires. In practical application, the controller 10 is a single-chip microcomputer or a PLC controller.

[0034] In this embodiment, during use, the speed sensor 8 detects the rotational speed of the shaft and transmits the detected data to the controller 10. When the shaft overspeeds, the controller 10 activates the servo motor 4, which drives the lead screw 2 to rotate, causing the slide plate 5 to move downwards. The slide plate 5 then moves the connecting rod 6 and the friction plate 7 downwards, causing the bottom of the friction plate 7 to press against the shaft, thus slowing down the shaft. As the shaft speed decreases, the speed of the blades and hub also decreases, preventing damage to the wind turbine body 1. Simultaneously, when the bottom of the friction plate 7 presses against the shaft, the friction block 14 is pressed back into the groove, causing the top of the friction block 14 to press against the detection surface of the pressure sensor 16. The pressure sensor 16 transmits the detected information to the controller 10. After processing, the controller 10 shuts down the servo motor 4 to prevent the friction plate 7 from pressing excessively against the shaft. Example

[0035] This embodiment further illustrates the technology. A protective box 11 is installed on the wind turbine body 1, and a controller 10 is installed inside the protective box 11. A memory 12 for storing data is installed inside the protective box 11, and the memory 12 is electrically connected to the controller 10. Figure 1 and Figure 4 As shown, the protective box 11 is installed on the front side wall of the wind turbine body 1; the memory 12 is connected to the controller 10 through wires; in actual application, the protective box 11 protects the controller 10 and the memory 12, and the memory 12 stores the detected speed and other data, and backs up the detected data.

[0036] In practical applications, heat dissipation holes are opened on the side wall of the protective box 11 to dissipate heat from the inside of the protective box 11 and prevent the temperature inside the protective box 11 from becoming too high.

[0037] To further explain, such as Figure 1 As shown, the protective box 11 is equipped with a built-in antenna 13 for transmitting information. The built-in antenna 13 is electrically connected to the controller 10. The built-in antenna 13 is connected to the controller 10 through a wire. The built-in antenna 13 is a 4G antenna or a 5G antenna. In actual application, the data is transmitted to the background through the built-in antenna. The staff can query the rotation speed of the shaft in real time, so that the staff can quickly determine whether the wind turbine body 1 is overspeeding. Example

[0038] This embodiment further illustrates the technology. A heat dissipation vent is provided on the front side wall of the tank 3, and a dustproof mesh 18 is installed inside the vent. Figure 4 As shown; heat dissipation is achieved through the heat dissipation vents to prevent the internal temperature of the tank 3 from becoming too high; dust screen 18 is used to prevent dust and other contaminants from entering the tank 3 through the heat dissipation vents.

[0039] Further, as shown in Figure 4 the side wall of the protection box 11 is provided with an access hole, and a protection door 19 is hinged in the access hole to seal the access hole; the protection door 19 is hinged in the access hole through a hinge or a hinge leaf; in actual application, the components inside the protection box 11 can be conveniently maintained and replaced by opening the protection door 19.

Claims

1. A wind turbine overspeed control device comprising a wind turbine body (1) and a controller (10), characterized in that: The wind turbine body (1) is provided with a rotating speed sensor (8) for detecting the rotating speed of the rotating shaft of the wind turbine body (1), a friction plate (7) is horizontally arranged above the rotating shaft for reducing the rotating speed of the rotating shaft, the wind turbine body (1) is provided with a height adjusting assembly for adjusting the height of the friction plate (7), a recess is formed in the central position of the bottom of the friction plate (7), a pressure sensor (16) is arranged in the recess, an extruding assembly is arranged in the recess for extruding the pressure sensor (16), the height adjusting assembly, the rotating speed sensor (8) and the pressure sensor (16) are electrically connected with a controller (10), the controller (10) is used for receiving and processing the information transmitted by the pressure sensor (16) and the rotating speed sensor (8) and controlling the opening and closing of the height adjusting assembly.

2. The wind turbine overspeed control apparatus of claim 1, wherein: The height adjusting assembly comprises a groove body (3) arranged on the top of the wind turbine body (1), the groove body (3) is downwardly open, a screw rod (2) is vertically arranged in the groove body (3), a servo motor (4) is arranged on the bottom of the groove body (3) for driving the screw rod (2) to rotate, a sliding plate (5) is sleeved on the screw rod (2) and is in rotational cooperation with the screw rod (2), a sliding groove is formed in the left inner wall of the groove body (3) for allowing the sliding plate (5) to slide upwardly and downwardly, a through groove is formed in the right wall of the groove body (3) and communicates with the outside, the right half of the sliding plate (5) passes through the through groove and extends out of the groove body (3), the sliding plate (5) is in upward and downward sliding cooperation with the through groove, a connecting rod (6) is vertically arranged on the right end of the bottom of the sliding plate (5) and is fixedly connected with the top of the friction plate (7), the servo motor (4) is electrically connected with the controller (10), and the controller (10) is used for controlling the opening and closing of the servo motor (4).

3. The wind turbine overspeed control apparatus of claim 1, wherein: The extruding assembly comprises a friction block (14) arranged in the recess, the friction block (14) is in upward and downward sliding cooperation with the recess, the friction block (14) is arranged on the bottom of the recess through two vertical springs (15), the two springs (15) are distributed leftward and rightward, the pressure sensor (16) is located between the two springs (15), when the springs (15) are in natural length, there is a gap between the pressure sensor (16) and the friction block (14), and the lower end of the friction block (14) extends out of the recess.

4. The wind turbine overspeed control apparatus of claim 1, wherein: The wind turbine body (1) is provided with a protection box (11), the controller (10) is arranged in the protection box (11), a storage (12) for storing data is arranged in the protection box (11), and the storage (12) is electrically connected with the controller (10).

5. The wind turbine overspeed control apparatus of claim 4, wherein: A built-in antenna (13) for transmitting information is arranged in the protection box (11) and is electrically connected with the controller (10).

6. The wind turbine overspeed control apparatus of claim 2, wherein: A heat dissipation opening is formed in the front wall of the groove body (3), and a dustproof net (18) is arranged in the heat dissipation opening.

7. The wind turbine overspeed control apparatus of claim 4, wherein: A maintenance opening is formed in the side wall of the protection box (11), and a protection door (19) for sealing the maintenance opening is hingedly arranged in the maintenance opening.

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