阅读说明：本技术 一种风机偏航控制系统 (Fan yaw control system ) 是由 崔巍 史祥 吕福元 纪辉 赵凤伟 延卫忠 卢引承 永胜 裴利忠 吕井波 李智楠 于 2020-12-03 设计创作，主要内容包括：本发明涉及风电风机的技术领域,具体而言,涉及一种风机偏航控制系统,包括控制单元、液压站和用于对偏航机构刹车的刹车油缸。液压站设置有油压传感器。控制单元根据油压传感器的监测数据控制液压站输出至刹车油缸的油压。本发明的风机偏航控制系统使用时,油压传感器监测液压站输送至刹车油缸的液压油的油压。控制单元根据油压控制液压站输出的油压。这种风机偏航控制系统的油压根据根据油压传感器的监测结果来控制,使得油压控制为闭环控制,避免盲目控制油压导致的油压过大或过小,使得油压大小合适。(The invention relates to the technical field of wind power fans, in particular to a fan yaw control system which comprises a control unit, a hydraulic station and a brake oil cylinder for braking a yaw mechanism. The hydraulic station is provided with an oil pressure sensor. And the control unit controls the oil pressure output to the brake oil cylinder by the hydraulic station according to the monitoring data of the oil pressure sensor. When the fan yaw control system is used, the oil pressure sensor monitors the oil pressure of hydraulic oil conveyed to the brake oil cylinder by the hydraulic station. The control unit controls the oil pressure output from the hydraulic station according to the oil pressure. The oil pressure of the fan yaw control system is controlled according to the monitoring result of the oil pressure sensor, so that the oil pressure control is closed-loop control, the phenomenon that the oil pressure is too large or too small due to blind control of the oil pressure is avoided, and the oil pressure is suitable.)

1. A fan yaw control system is characterized in that: the device comprises a control unit, a hydraulic station and a brake oil cylinder for braking a yaw mechanism; the hydraulic station is provided with an oil pressure sensor; and the control unit controls the hydraulic station to output the oil pressure to the brake oil cylinder according to the monitoring data of the oil pressure sensor.

2. The wind turbine yaw control system of claim 1, wherein: the system also comprises a communication unit and a remote terminal; the control unit and the remote terminal communicate through the communication unit.

3. The wind turbine yaw control system of claim 2, wherein: the communication unit is a wired communication module or a wireless communication module.

4. The wind turbine yaw control system of claim 1, wherein: the oil pressure sensor is provided with an oil pressure display.

5. A wind turbine yaw control system according to any of claims 2 or 3, wherein: the oil pressure of the hydraulic station comprises an upper threshold value and a lower threshold value; and when the residual pressure of the hydraulic station is higher than the upper threshold value or lower than the lower threshold value, the control unit sends an alarm signal to the remote terminal.

6. The wind turbine yaw control system of claim 5, wherein: the upper threshold value is 20 bar; the lower threshold is 5 bar.

7. The wind turbine yaw control system of claim 5, wherein: an electromagnetic valve is arranged between the brake oil cylinder and the hydraulic station; when the residual pressure of the hydraulic station is higher than the upper threshold value or lower than the lower threshold value, the control unit controls the electromagnetic valve to reset; and if the electromagnetic valve cannot enable the residual pressure of the hydraulic station to be between the upper threshold value and the lower threshold value after being reset for multiple times, the fan corresponding to the hydraulic station is stopped and a stop signal is sent to the remote terminal.

8. The wind turbine yaw control system of claim 7, wherein: and if the residual pressure of the hydraulic station cannot be between the upper threshold value and the lower threshold value after the electromagnetic valve is reset for three times, the fan corresponding to the hydraulic station is stopped and a stop signal is sent to the remote terminal.

9. The wind turbine yaw control system of claim 5, wherein: and after the control unit sends an alarm signal to the remote terminal for 24 hours, if the residual pressure of the hydraulic station is still higher than the upper threshold value or lower than the lower threshold value, the shutdown signal is sent to the remote terminal by the corresponding fan shutdown property of the hydraulic station.

Technical Field

The invention relates to the technical field of wind power fans, in particular to a fan yaw control system.

Background

In order to better obtain wind energy, wind power fans are provided with a yaw system. The function of the wind direction sensor is to quickly and smoothly align the wind direction when the direction of the wind speed vector changes. When the fact that the unit needs yaw is detected, the electric band-type brake of the yaw motor is loosened, the electromagnetic valve of the hydraulic station acts, the yaw pressure is reduced to the yaw residual pressure from the system pressure, the brake block is properly loosened, and the fan can conveniently yaw. And after the yawing is finished, the yawing pressure is restored to the system pressure, so that the yawing system is braked, and the yawing system is prevented from swinging randomly.

At present, when a fan deflects, the yawing residual pressure is invisible, and judgment can be carried out only by depending on experience during routing inspection. When the yaw residual voltage is too large, protection can be realized only by tripping the power switch in fault when the yaw motor is in overcurrent, which can cause that the yaw brake block is worn quickly, the brake disc is worn, and even the power switch of the yaw motor is frequently tripped. If the yaw residual pressure is too small or no residual pressure exists, the fan can only depend on the yaw gearbox to prevent the driving device from reversing when yawing, and abnormal impact damage and even tooth breakage of the yaw gearbox can be caused.

Content of application

The invention aims to provide a fan yaw control system which can adjust the output oil pressure of a hydraulic station according to the detected oil pressure so as to avoid too large or too small clamping force output by a brake oil cylinder.

The embodiment of the invention is realized by the following technical scheme:

a fan yaw control system comprises a control unit, a hydraulic station and a brake oil cylinder for braking a yaw mechanism; the hydraulic station is provided with an oil pressure sensor; and the control unit controls the hydraulic station to output the oil pressure to the brake oil cylinder according to the monitoring data of the oil pressure sensor.

Further, the system also comprises a communication unit and a remote terminal; the control unit and the remote terminal communicate through the communication unit.

Further, the communication unit is a wired communication module or a wireless communication module.

Further, the oil pressure sensor is provided with an oil pressure display.

Further, the oil pressure of the hydraulic station includes an upper threshold and a lower threshold; and when the residual pressure of the hydraulic station is higher than the upper threshold value or lower than the lower threshold value, the control unit sends an alarm signal to the remote terminal.

Further, the upper threshold is 20 bar; the lower threshold is 5 bar.

Furthermore, an electromagnetic valve is arranged between the brake oil cylinder and the hydraulic station; when the residual pressure of the hydraulic station is higher than the upper threshold value or lower than the lower threshold value, the control unit controls the electromagnetic valve to reset; and if the electromagnetic valve cannot enable the residual pressure of the hydraulic station to be between the upper threshold value and the lower threshold value after being reset for multiple times, the fan corresponding to the hydraulic station is stopped and a stop signal is sent to the remote terminal.

Further, if the residual pressure of the hydraulic station cannot be caused to be between the upper threshold value and the lower threshold value after the electromagnetic valve is reset for three times, the fan corresponding to the hydraulic station is stopped and a stop signal is sent to the remote terminal.

Further, after the control unit sends an alarm signal to the remote terminal for 24 hours, if the residual pressure of the hydraulic station is still higher than the upper threshold value or lower than the lower threshold value, the fan stopping performance corresponding to the hydraulic station sends a stopping signal to the remote terminal. The technical scheme of the embodiment of the invention at least has the following advantages and beneficial effects:

when the fan yaw control system is used, the oil pressure sensor monitors the oil pressure of hydraulic oil conveyed to the brake oil cylinder by the hydraulic station. The control unit controls the oil pressure output from the hydraulic station according to the oil pressure. The oil pressure of the fan yaw control system is controlled according to the monitoring result of the oil pressure sensor, so that the oil pressure control is closed-loop control, the phenomenon that the oil pressure is too large or too small due to blind control of the oil pressure is avoided, and the oil pressure is suitable.

The accurate thrust size that makes the brake hydro-cylinder apply for the brake block of oil pressure control is suitable, avoids the brake block brake to lead to the brake block wearing and tearing too fast too diely, also avoids the brake to lead to yaw motor output too big and then lead to yaw motor overcurrent outage too died. Meanwhile, the brake pad cannot play a braking role due to too small thrust is also avoided, and then the fan can only depend on the yaw gearbox to prevent the driving device from reversing when yawing, so that abnormal impact damage and even tooth breakage of the yaw gearbox can be caused.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a block diagram of a wind turbine yaw control system according to the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example (b):

the invention provides a fan yaw control system which comprises a control unit, a hydraulic station and a brake oil cylinder for braking a yaw mechanism. The hydraulic station is provided with an oil pressure sensor. And the control unit controls the oil pressure output to the brake oil cylinder by the hydraulic station according to the monitoring data of the oil pressure sensor.

The fan yaw control system further comprises a yaw mechanism and a yaw motor. The yaw motor is in transmission connection with the yaw mechanism through the reduction gearbox. The yaw motor acts to drive the yaw mechanism to rotate so as to execute the yaw action.

In the running process of the fan yaw control system, when the control unit detects that the unit needs yaw, the electric brake of the yaw motor is released, the electromagnetic valve of the hydraulic station acts, so that the yaw pressure is reduced from the system pressure (140-160bar) to the yaw residual pressure (10-15bar), the thrust of the brake cylinder to the brake pad is reduced, and the yaw mechanism can rotate under the driving of the yaw motor. At this moment, the brake block still has the power of hugging the yaw mechanism for the yaw mechanism can only rotate under the drive of yaw motor, and can not rotate at will. And then, the yaw motor is electrified to start yawing.

In this process, the oil pressure sensor monitors the oil pressure of the hydraulic oil delivered to the brake cylinder by the hydraulic station. The control unit controls the oil pressure output from the hydraulic station according to the oil pressure. The oil pressure of the fan yaw control system is controlled according to the monitoring result of the oil pressure sensor, so that the oil pressure control is closed-loop control, the phenomenon that the oil pressure is too large or too small due to blind control of the oil pressure is avoided, and the oil pressure is suitable.

The accurate thrust size that makes the brake hydro-cylinder apply for the brake block of oil pressure control is suitable, avoids the brake block brake to lead to the brake block wearing and tearing too fast too diely, also avoids the brake to lead to yaw motor output too big and then lead to yaw motor overcurrent outage too died. Meanwhile, the brake pad cannot play a braking role due to too small thrust is also avoided, and then the fan can only depend on the yaw gearbox to prevent the driving device from reversing when yawing, so that abnormal impact damage and even tooth breakage of the yaw gearbox can be caused.

In this embodiment, the system further includes a communication unit and a remote terminal. The control unit and the remote terminal communicate through the communication unit. The communication unit is a wired communication module or a wireless communication module. Specifically, the communication unit may be a network cable interface or the like; or a 5G communication module or a WIFI communication module. The remote terminal is arranged in the control room. In use, an operator can check the state of the fan at the far end in the control room, such as oil pressure and other parameters. Meanwhile, an operator can send an instruction to the control unit through the remote terminal so as to control the hydraulic station.

In this embodiment, the oil pressure sensor is provided with an oil pressure display. Oil pressure sensor not only can show the oil pressure to the control unit input signal, can also show the oil pressure simultaneously, and people can the current oil pressure of audio-visual definite when making things convenient for the inspection.

In the present embodiment, the oil pressure of the hydraulic station includes an upper threshold value and a lower threshold value. The upper threshold is 20bar and the lower threshold is 5 bar. When the residual pressure of the hydraulic station is higher than the upper threshold value or lower than the lower threshold value, the control unit sends an alarm signal to the remote terminal. This just makes the condition of single fan can be timely transmission to the control room, and the timely grasp condition of operating personnel of being convenient for operations such as the maintenance of fan are more timely.

In this embodiment, an electromagnetic valve is arranged between the brake cylinder and the hydraulic station. When the residual pressure of the hydraulic station is higher than the upper threshold value or lower than the lower threshold value, the control unit controls the electromagnetic valve to reset. If the electromagnetic valve cannot enable the residual pressure of the hydraulic station to be between the upper threshold value and the lower threshold value after being reset for multiple times, the fan corresponding to the hydraulic station is stopped, and a stop signal is sent to the remote terminal.

There are various factors that cause the residual pressure of the hydraulic station to be abnormal. When the residual pressure of the hydraulic station is abnormal, the control unit controls the electromagnetic valve to reset. If the residual pressure of the hydraulic station cannot be between the upper threshold value and the lower threshold value after the electromagnetic valve is reset for many times, the problem cannot be solved by the electromagnetic valve resetting mode, and the machine should be stopped to wait for maintenance. If the electromagnetic valve can be reset to solve the problem, the machine does not need to be stopped. This arrangement avoids a reduction in production due to a blind shutdown.

In practice, if the electromagnetic valve cannot be reset for three times so that the residual pressure of the hydraulic station is between the upper threshold value and the lower threshold value, the fan corresponding to the hydraulic station is stopped and a stop signal is sent to the remote terminal.

In this embodiment, after the control unit sends the alarm signal to the remote terminal for 24 hours, if the residual pressure of the hydraulic station is still higher than the upper threshold or lower than the lower threshold, the fan corresponding to the hydraulic station is stopped and sends a stop signal to the remote terminal.

In actual use, the problem may be solved by resetting the solenoid valve, but the problem still reappears. In this case, the fan can continue to operate. However, long-term operation of the fan under such conditions may result in brake pad damage, gearbox damage, or yaw motor damage. Therefore, in the case where such a problem occurs, the blower can be allowed to operate for 24 hours for a short time. Within 24 hours, it can be overhauled. If the problem is not solved for more than 24 hours, the machine can be stopped to wait for maintenance. This has both guaranteed output, has also guaranteed that the fan can be timely overhauld.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.