High-speed shaft brake for wind power generation

Abstract

The high-speed shaft type brake for wind power generation comprises a shell, a main shaft is rotationally connected to one side of the shell, a main braking mechanism is fixedly connected to the bottom of the inner wall of the shell, an auxiliary braking mechanism is arranged in the shell, the main shaft penetrates through the main braking mechanism and the auxiliary braking mechanism, and a controller is fixedly connected to the inner wall of the shell. An expansion box is fixedly connected to the bottom of the shell, a motor is fixedly connected to the inner wall of the expansion box, a motor output shaft penetrates through the inner wall of the expansion box and extends into the shell, the base is fixedly connected to the bottom of the inner wall of the shell, the claw disc shell is fixedly connected to the top of the base, and the three bevel pinions evenly penetrate through the outer surface of the claw disc shell. The small bevel gear is rotationally connected with the claw disc shell, and the three clamping claws are slidably connected to one side of the claw disc shell. The main shaft can be rapidly braked, and meanwhile the problem that the friction performance is reduced due to friction overheating can be solved through alternate braking of double braking.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic station pressure balancing, and in particular to a high-speed shaft brake for wind power generation. Background Art

[0002] In the existing technology, the wind turbine main shaft is the core component of the wind turbine, connecting the wind wheel and the gearbox, transmitting the torque generated by the rotation of the blades to the transmission system to realize the conversion of wind energy into mechanical energy, bearing the mechanical loads such as the gravity and aerodynamic load of the wind wheel and maintaining the centration of the shaft system.

[0003] After searching, the invention of Chinese patent publication number CN219795446U discloses a braking device for a wind turbine generator, comprising a housing base provided with a drive motor, a blade rotating shaft rotatably connected to the housing base, two sets of wear-resistant sleeves spaced apart on the blade rotating shaft, the blade rotating shaft driven by the drive motor, two sets of support plates fixedly connected to the housing base at intervals, each set of support plates having a sliding groove, two sets of movable plates slidably connected in the sliding groove, the two sets of movable plates driven by a power device, two sets of damping rods fixedly connected to the two sets of movable plates at intervals, the protruding ends of the two sets of damping rods fixedly connected to brake plates corresponding to the wear-resistant sleeves, and a buffer spring provided between the brake plates and the movable plates. Although the above invention can increase friction by driving the movable plates toward the rotating shaft through a bidirectional screw, and can lock the blade rotating shaft at the same time with the help of components such as the buffer spring, the friction braking by the brake plates and the wear-resistant sleeves can cause the friction coefficient of the wear-resistant plates to decrease due to overheating under high-load braking, and the displacement of the brake plates is achieved by relying on the bidirectional screw, the mechanical transmission chain is long, and emergency braking cannot be achieved. Summary of the Invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a high-speed shaft brake for wind power generation.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A high-speed shaft brake for wind power generation includes a shell, one side of the shell is rotatably connected to a main shaft, the bottom of the inner wall of the shell is fixedly connected to a main brake mechanism, an auxiliary brake mechanism is provided inside the shell, and the main shaft passes through the main brake mechanism and the auxiliary brake mechanism, and a controller is fixedly connected to the inner wall of the shell.

[0007] As a further solution of the present invention: an expansion box is fixedly connected to the bottom of the shell, a motor is fixedly connected to the inner wall of the expansion box, and the motor output shaft passes through the inner wall of the expansion box and extends to the inside of the shell.

[0008] As a further solution of the present invention: the main brake mechanism includes a claw disc housing, a small bevel gear, a friction plate, a clamping claw, a base and a claw disc body, and the base is fixedly connected to the bottom of the inner wall of the shell.

[0009] As a further solution of the present invention: the claw disk shell is fixedly connected to the top of the base, the three small bevel gears evenly penetrate the outer surface of the claw disk shell, and the small bevel gears are rotatably connected to the claw disk shell, the three clamping claws are respectively slidably connected to one side of the claw disk shell, and one side of the clamping claw is fixedly connected to a rack, the friction plate is fixedly connected to one side of the clamping claw, and the claw disk body is rotatably connected to the inner wall of the claw disk shell.

[0010] As a further solution of the present invention: conical teeth are provided on one side of the claw disc body, and a flat thread is provided on the other side of the claw disc body, and the conical teeth of the claw disc body are meshed with the small bevel gear, and the flat thread on the other side of the claw disc body is meshed with the rack of the clamp, and one of the small bevel gears is fixedly connected to the output shaft of the motor.

[0011] As a further solution of the present invention: the auxiliary braking mechanism includes a connecting seat, a bracket, a spring hydraulic cylinder, electromagnet 1, electromagnet 2, a clamp and a temperature sensor, and the connecting seat is fixedly connected to the inner wall of the shell, the two brackets are respectively fixedly connected to the two sides of the connecting seat, and the bottom of the bracket is respectively fixedly connected to electromagnet 1.

[0012] As a further solution of the present invention: a spring hydraulic cylinder is fixedly connected to the bottom of the connecting seat, a clamp is fixedly connected to the telescopic end of the spring hydraulic cylinder, an electromagnet 2 is fixedly connected to the top of the clamp, and the magnetic pole of electromagnet 2 is opposite to that of electromagnet 1, and the connecting seat, bracket, spring hydraulic cylinder, electromagnet 1, electromagnet 2 and clamp form an upper and lower symmetrical structure with the reference plane where the midpoint of the main shaft axis is located as the mirror plane, and the temperature sensor is fixedly connected to the top of the connecting seat near the bottom of the inner wall of the shell.

[0013] Compared with the prior art, the present invention provides a high-speed shaft brake for wind power generation, which has the following beneficial effects:

[0014] 1. When the spindle needs to be braked, the motor is started. At this time, the motor drives the main brake mechanism to clamp the spindle. During this process, the auxiliary brake mechanism continuously monitors the temperature of the contact area between the main brake mechanism and the spindle, and transmits the temperature signal to the controller in real time. When the monitored temperature exceeds the preset threshold, the controller sends a reverse command to the motor, driving the main brake mechanism to return to the initial position, releasing the brake on the spindle, and synchronously activating the auxiliary brake mechanism to quickly clamp the spindle. When the temperature drops back to a safe range, the controller controls the auxiliary brake mechanism to release the brake, and the motor resets forward at the same time, and the main brake mechanism resumes working state. In this way, the failure risk of traditional single-path braking system due to overheating is avoided and the braking reliability is significantly improved.

[0015] 2. When the spindle needs to be braked, the motor starts and drives the small bevel gear to rotate. At this time, the small bevel gear drives the claw disc body to perform circular motion in the claw disc housing. During this process, the flat thread of the claw disc body engages with the rack of the clamping jaw, and the rotational motion of the claw disc body is converted into linear motion of the clamping jaw, gradually approaching the center of the circle of the claw disc housing. The clamping jaw drives the friction plate to fit the surface of the spindle, and braking is achieved through friction. Since the three sets of clamping jaws are driven by the same flat thread, the radial force is evenly distributed during braking. Therefore, the rise angle design of the flat thread can produce a self-locking effect, ensuring that it will not loosen after clamping, and the response speed is fast, meeting the requirements of emergency braking for rapid response.

[0016] 3. When the main brake mechanism is braking, the temperature sensor monitors the temperature of the contact area between the friction plate of the main brake mechanism and the main shaft in real time. Once the detection value exceeds the preset threshold, the temperature signal is transmitted to the controller. The controller first controls the motor to reverse to make the clamp move away from the main shaft. At the same time, the controller controls electromagnet 1 and electromagnet 2 to cut off the power. At this time, electromagnet 1 and electromagnet 2 no longer attract each other, the telescopic end of the spring hydraulic cylinder gradually extends, and drives the clamp to approach and contact the outer wall of the main shaft. On the contrary, when the temperature sensor detects that the temperature at the contact point between the main brake mechanism and the main shaft drops to a normal value, the controller energizes electromagnet 2 and electromagnet 1, and electromagnet 2 and electromagnet 1 attract each other, and at the same time drives the clamp to squeeze the telescopic end of the spring hydraulic cylinder away from the main shaft, thereby achieving a circulating cooling effect of alternating heat dissipation between the main and auxiliary, and braking the main shaft at the same time, reducing the wear on the friction plate of the main brake mechanism and preventing the friction plate from overheating and reducing friction efficiency.

[0017] The parts not involved in the device are the same as those in the prior art or can be implemented by using the prior art. The present invention has a simple structure and is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a front view of a high-speed shaft brake for wind power generation proposed by the present invention;

[0019] Figure 2 A longitudinal cross-sectional view of a high-speed shaft brake for wind power generation proposed by the present invention;

[0020] Figure 3 This is a structural schematic diagram of a main brake mechanism in a high-speed shaft brake for wind power generation proposed by the present invention;

[0021] Figure 4 This is an exploded view of the main brake mechanism in a high-speed shaft brake for wind power generation proposed by the present invention;

[0022] Figure 5 for Figure 2 Enlarged view of point A.

[0023] In the figure: 1. Main shaft; 2. Housing; 3. Extension box; 4. Main brake mechanism; 5. Auxiliary brake mechanism; 6. Controller; 7. Motor; 401. Claw plate housing; 402. Small bevel gear; 403. Friction plate; 404. Clamp; 405. Base; 406. Claw plate body; 501. Connecting seat; 502. Bracket; 503. Spring hydraulic cylinder; 504. Electromagnet 1; 505. Electromagnet 2; 506. Clamp; 507. Temperature sensor. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0025] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," and "disposed" should be understood in a broad sense. For example, they may refer to fixed connection or disposition, detachable connection or disposition, or integral connection or disposition. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0026] A high-speed shaft brake for wind power generation, such as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 As shown, it includes a shell 2, a main shaft 1 is rotatably connected to one side of the shell 2, a main brake mechanism 4 is fixedly connected to the bottom of the inner wall of the shell 2, an auxiliary brake mechanism 5 is arranged inside the shell 2, and the main shaft 1 passes through the main brake mechanism 4 and the auxiliary brake mechanism 5, a controller 6 is fixedly connected to the inner wall of the shell 2, an expansion box 3 is fixedly connected to the bottom of the shell 2, a motor 7 is fixedly connected to the inner wall of the expansion box 3, and the output shaft of the motor 7 passes through the inner wall of the extension box 3, and the output shaft of the motor 7 extends to the inside of the shell 2, and the model of the controller 6 is LOGO8.

[0027] When the spindle 1 needs to be braked, the motor 7 is started. At this time, the motor 7 drives the main brake mechanism 4 to clamp and brake the spindle 1. During this process, the auxiliary brake mechanism 5 continuously monitors the temperature of the contact area between the main brake mechanism 4 and the spindle 1, and transmits the temperature signal to the controller 6 in real time.

[0028] When the monitored temperature exceeds a preset threshold, the controller 6 sends a reverse command to the motor 7, driving the main brake mechanism 4 to return to its initial position, releasing the brake on the main shaft 1, and synchronously activating the auxiliary brake mechanism 5, so that the auxiliary brake mechanism 5 quickly clamps the main shaft 1. When the temperature drops back to a safe range, the controller 6 controls the auxiliary brake mechanism 5 to release the brake, and at the same time the motor 7 rotates forward and resets, and the main brake mechanism 4 resumes its working state. This avoids the risk of failure of the traditional single-path braking system due to overheating and significantly improves braking reliability.

[0029] In order to be able to brake the spindle 1 Figure 3 and Figure 4 As shown, the main brake mechanism 4 includes a claw plate housing 401, a small bevel gear 402, a friction plate 403, a clamping claw 404, a base 405 and a claw plate body 406, and the base 405 is fixedly connected to the bottom of the inner wall of the shell 2, the claw plate housing 401 is fixedly connected to the top of the base 405, three small bevel gears 402 evenly penetrate the outer surface of the claw plate housing 401, and the small bevel gear 402 is rotatably connected to the claw plate housing 401, and the three clamping claws 404 are respectively slidably connected to one side of the claw plate housing 401, and A rack is fixedly connected to one side of the clamping jaw 404, and the friction plate 403 is fixedly connected to one side of the clamping jaw 404. The claw disc body 406 is rotatably connected to the inner wall of the claw disc housing 401, and conical teeth are provided on one side of the claw disc body 406, and a flat thread is provided on the other side of the claw disc body 406. The conical tooth side of the claw disc body 406 is meshed with the small bevel gear 402, and the flat thread side of the other side of the claw disc body 406 is meshed with the rack of the clamping jaw 404, and one of the small bevel gears 402 is fixedly connected to the output shaft of the motor 7.

[0030] When the main shaft 1 needs to be braked, the motor 7 starts and drives the small bevel gear 402 to rotate. At this time, the small bevel gear 402 drives the claw plate body 406 to perform a circular motion in the claw plate housing 401.

[0031] During this process, since the flat thread of the claw plate body 406 is engaged with the rack of the clamping jaw 404, the rotational motion of the claw plate body 406 is converted into a linear motion of the clamping jaw 404, gradually approaching the center of the claw plate housing 401.

[0032] The clamping jaws 404 drive the friction plate 403 to fit the surface of the main shaft 1, and braking is achieved through friction. Since the three sets of clamping jaws 404 are driven by the same plane thread, the radial force is evenly distributed during braking. Therefore, the lead angle design of the plane thread can produce a self-locking effect, ensuring that it will not loosen after clamping, and the response speed is fast, meeting the requirements of emergency braking for rapid response.

[0033] In order to prevent the main brake mechanism 4 from overheating due to continuous braking, Figure 5As shown, the auxiliary brake mechanism 5 includes a connecting seat 501, a bracket 502, a spring hydraulic cylinder 503, an electromagnet 1 504, an electromagnet 2 505, a clamp 506 and a temperature sensor 507, and the connecting seat 501 is fixedly connected to the inner wall of the shell 2, the two brackets 502 are fixedly connected to the two sides of the connecting seat 501, the bottom of the bracket 502 is fixedly connected to the electromagnet 1 504, the bottom of the connecting seat 501 is fixedly connected to the spring hydraulic cylinder 503, and the telescopic end of the spring hydraulic cylinder 503 is fixedly connected to the clamp 506, the top of the clamp 506 is fixedly connected to the electromagnet 2 505, and the magnetic poles of the electromagnet 2 505 are opposite to those of the electromagnet 1 504, and the connecting seat 501, the bracket 502, the spring hydraulic cylinder 503, the electromagnet 1 504, the electromagnet 2 505 and the clamp 506 form a vertically symmetrical structure with the reference plane where the midpoint of the axis of the main shaft 1 is located as the mirror plane, and the temperature sensor 507 is fixedly connected to the top of the connecting seat 501 near the bottom of the inner wall of the shell 2, and the model of the temperature sensor 507 is PT100.

[0034] When the main brake mechanism 4 is braking, the temperature sensor 507 monitors the temperature of the contact area between the friction plate 403 of the main brake mechanism 4 and the main shaft 1 in real time. Once the detection value exceeds a preset threshold, the temperature signal is transmitted to the controller 6.

[0035] The controller 6 first controls the motor 7 to reverse, so that the clamping claw 404 moves away from the main shaft 1. At the same time, the controller 6 controls the electromagnet 1 504 and the electromagnet 2 505 to cut off the power. At this time, the electromagnet 1 504 and the electromagnet 2 505 no longer attract each other, and the telescopic end of the spring hydraulic cylinder 503 gradually extends, and drives the clamp 506 to approach and contact the outer wall of the main shaft 1.

[0036] On the contrary, when the temperature sensor 507 detects that the temperature at the contact point between the main brake mechanism 4 and the main shaft 1 has dropped to a normal value, the controller 6 energizes the electromagnet 2 505 and the electromagnet 1 504, and the electromagnet 2 505 and the electromagnet 1 504 attract each other, and at the same time drive the clamp 506 to squeeze the telescopic end of the spring hydraulic cylinder 503 away from the main shaft 1, thereby achieving a circulating cooling effect of alternating heat dissipation between the main and auxiliary, and at the same time braking the main shaft 1, reducing the wear on the friction plate 403 of the main brake mechanism 4, and preventing the friction plate 403 from overheating and causing a decrease in friction efficiency.

[0037] Working principle: When the main shaft 1 needs to be braked, the motor 7 is started. At this time, the motor 7 drives the main brake mechanism 4 to clamp and brake the main shaft 1. During this process, the auxiliary brake mechanism 5 continuously monitors the temperature of the contact area between the main brake mechanism 4 and the main shaft 1, and transmits the temperature signal to the controller 6 in real time.

[0038] When the monitored temperature exceeds the preset threshold, the controller 6 sends a reverse command to the motor 7, driving the main brake mechanism 4 to return to the initial position, releasing the brake on the main shaft 1, and synchronously activating the auxiliary brake mechanism 5, so that the auxiliary brake mechanism 5 quickly clamps the main shaft 1. When the temperature drops back to a safe range, the controller 6 controls the auxiliary brake mechanism 5 to release the brake, and at the same time the motor 7 rotates forward and resets, and the main brake mechanism 4 resumes working state.

[0039] When the main shaft 1 needs to be braked, the motor 7 starts and drives the small bevel gear 402 to rotate. At this time, the small bevel gear 402 drives the claw plate body 406 to perform a circular motion in the claw plate housing 401.

[0040] During this process, since the flat thread of the claw plate body 406 is engaged with the rack of the clamping jaw 404, the rotational motion of the claw plate body 406 is converted into a linear motion of the clamping jaw 404, gradually approaching the center of the claw plate housing 401.

[0041] The clamping jaws 404 drive the friction plate 403 to fit the surface of the main shaft 1, and brake is achieved through friction. Since the three sets of clamping jaws 404 are driven by the same plane thread, the radial force is evenly distributed during braking.

[0042] When the main brake mechanism 4 is braking, the temperature sensor 507 monitors the temperature of the contact area between the friction plate 403 of the main brake mechanism 4 and the main shaft 1 in real time. Once the detection value exceeds a preset threshold, the temperature signal is transmitted to the controller 6.

[0043] The controller 6 first controls the motor 7 to reverse, so that the clamping claw 404 moves away from the main shaft 1. At the same time, the controller 6 controls the electromagnet 1 504 and the electromagnet 2 505 to cut off the power. At this time, the electromagnet 1 504 and the electromagnet 2 505 no longer attract each other, and the telescopic end of the spring hydraulic cylinder 503 gradually extends, and drives the clamp 506 to approach and contact the outer wall of the main shaft 1.

[0044] On the contrary, when the temperature sensor 507 detects that the temperature at the contact point between the main brake mechanism 4 and the main shaft 1 has dropped to a normal value, the controller 6 energizes the electromagnet 2 505 and the electromagnet 1 504, and the electromagnet 2 505 and the electromagnet 1 504 attract each other, and at the same time drive the clamp 506 to squeeze the telescopic end of the spring hydraulic cylinder 503 away from the main shaft 1.

[0045] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A high-speed shaft brake for wind power generation, comprising a housing (2), characterized in that: One side of the housing (2) is rotatably connected to a main shaft (1), the bottom of the inner wall of the housing (2) is fixedly connected to a main brake mechanism (4), an auxiliary brake mechanism (5) is provided inside the housing (2), and the main shaft (1) passes through the main brake mechanism (4) and the auxiliary brake mechanism (5), and a controller (6) is fixedly connected to the inner wall of the housing (2).

2. A high-speed shaft brake for wind power generation according to claim 1, characterized in that: The bottom of the shell (2) is fixedly connected to an expansion box (3), the inner wall of the expansion box (3) is fixedly connected to a motor (7), and the output shaft of the motor (7) passes through the inner wall of the expansion box (3), and the output shaft of the motor (7) extends to the interior of the shell (2).

3. The high-speed shaft brake for wind power generation according to claim 1, characterized in that: The main brake mechanism (4) comprises a claw disc housing (401), a small bevel gear (402), a friction plate (403), a clamping claw (404), a base (405) and a claw disc body (406), and the base (405) is fixedly connected to the bottom of the inner wall of the housing (2).

4. A high-speed shaft brake for wind power generation according to claim 3, characterized in that: The claw disc housing (401) is fixedly connected to the top of the base (405), three small bevel gears (402) evenly penetrate the outer surface of the claw disc housing (401), and the small bevel gears (402) are rotatably connected to the claw disc housing (401), three clamping claws (404) are respectively slidably connected to one side of the claw disc housing (401), and one side of the clamping claw (404) is fixedly connected to a rack, a friction plate (403) is fixedly connected to one side of the clamping claw (404), and the claw disc body (406) is rotatably connected to the inner wall of the claw disc housing (401).

5. The high-speed shaft brake for wind power generation according to claim 3, characterized in that: One side of the claw disc body (406) is provided with conical teeth, and the other side of the claw disc body (406) is provided with a flat thread, and the conical tooth side of the claw disc body (406) is meshed with the small bevel gear (402), and the flat thread side of the other side of the claw disc body (406) is meshed with the rack of the clamping claw (404), and one of the small bevel gears (402) is fixedly connected to the output shaft of the motor (7).

6. The high-speed shaft brake for wind power generation according to claim 1, characterized in that: The auxiliary braking mechanism (5) comprises a connecting seat (501), a bracket (502), a spring hydraulic cylinder (503), an electromagnet 1 (504), an electromagnet 2 (505), a clamp (506) and a temperature sensor (507), wherein the connecting seat (501) is fixedly connected to the inner wall of the housing (2), the two brackets (502) are respectively fixedly connected to both sides of the connecting seat (501), and the bottom of the brackets (502) is respectively fixedly connected to the electromagnet 1 (504).

7. A high-speed shaft brake for wind power generation according to claim 6, characterized in that: The bottom of the connecting seat (501) is fixedly connected to a spring hydraulic cylinder (503), the telescopic end of the spring hydraulic cylinder (503) is fixedly connected to a clamp (506), the top of the clamp (506) is fixedly connected to an electromagnet 2 (505), and the magnetic poles of the electromagnet 2 (505) and the electromagnet 1 (504) are opposite, and the connecting seat (501), the bracket (502), the spring hydraulic cylinder (503), the electromagnet 1 (504), the electromagnet 2 (505) and the clamp (506) form a vertically symmetrical structure with the reference plane where the midpoint of the main shaft (1) axis is located as a mirror plane, and the temperature sensor (507) is fixedly connected to the top of the connecting seat (501) near the bottom of the inner wall of the shell (2).

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