A wind turbine hub maintenance auxiliary method and system

Abstract

The present application discloses a wind turbine hub maintenance assistance method, including collecting the locking status information of the wind turbine rotor locking pin; when the result of the locking status information is yes, controlling the hub door cover to switch to the open state; controlling the state of the wind turbine to switch to the shutdown maintenance state; when the result of the locking status information is no, controlling the hub door cover to switch to the closed state; controlling the state of the wind turbine to switch to the running state. This method can ensure that after the unit is shut down and before the staff enters the hub for operation, the wind turbine rotor locking pin is in a completely locked state, the electromagnetic lock on the hub door cover is opened, and the unit is in a shutdown maintenance state, thereby ensuring the personal safety of the staff and the safe and stable operation of the unit, and avoiding damage to the wind turbine rotor. The present application also discloses a wind turbine hub maintenance assistance system, which has the same advantages as the above method.

Description

Technical Field

[0001] The present invention belongs to the technical field of wind power generation equipment, and in particular relates to a wind turbine hub maintenance auxiliary method and system. Background Art

[0002] The wind rotor is an important part of the wind turbine that connects the hub and the nacelle. When the hub of the wind turbine needs to be repaired, the staff needs to stop the machine, lock the wind rotor, and then enter the hub through the hub channel. Since one end of the locking hole of the wind rotor is inside the nacelle and the other end is outside the nacelle and is not easy to observe, under normal circumstances, when locking the wind rotor, it is impossible to determine by naked eyes whether the wind rotor locking pin is completely in the locking hole position, so it is impossible to ensure that the wind rotor locking pin is in a locked state. If the staff enters the hub to operate at this time, it will not be possible to ensure that the hub is in a stable state, and there is a risk of hub loss of control, which can easily cause damage to the wind rotor and casualties. Summary of the invention

[0003] To solve the above problems, the present invention provides a wind turbine hub maintenance auxiliary method and system, which can ensure that after the unit is shut down and before the staff enters the hub to operate, the wind wheel locking pin is in a completely locked state, the electromagnetic lock on the hub door cover is open, and the unit is in a shutdown maintenance state, thereby ensuring the personal safety of the staff and the safe and stable operation of the unit, and avoiding damage to the wind wheel.

[0004] The present invention provides a wind turbine hub maintenance auxiliary method comprising:

[0005] Collecting the locking status information of the wind turbine rotor locking pin;

[0006] When the result of the locking state information is yes, controlling the wheel hub door cover to switch to an open state;

[0007] Control the state of the wind turbine generator set to switch to shutdown maintenance state;

[0008] When the result of the locking state information is no, controlling the wheel hub door cover to switch to a closed state;

[0009] Control the state of the wind turbine to switch to the running state.

[0010] Preferably, in the above-mentioned auxiliary method for repairing the hub of a wind turbine generator set, before collecting the locking state information of the locking pin of the wind turbine generator set, the method further comprises:

[0011] The locking state information is generated by utilizing the triggering action of a limit switch installed on the wind wheel locking pin.

[0012] Preferably, in the above-mentioned auxiliary method for repairing the hub of a wind turbine generator set, the step of controlling the hub door cover to switch to an open state is:

[0013] Open the electromagnetic lock on the wheel hub door cover.

[0014] Preferably, in the above-mentioned wind turbine hub maintenance auxiliary method, the state of the wind turbine is controlled to switch to the shutdown maintenance state as follows:

[0015] Use PLC to control the state of the wind turbine to switch to the shutdown maintenance state.

[0016] Preferably, in the above-mentioned auxiliary method for repairing the hub of a wind turbine generator set, the step of controlling the hub door cover to switch to a closed state is:

[0017] Close the electromagnetic lock on the wheel hub door cover.

[0018] Preferably, in the above-mentioned wind turbine hub maintenance auxiliary method, the state of controlling the wind turbine to switch to the running state is:

[0019] Use PLC to control the state of the wind turbine to switch to the operating state.

[0020] A wind turbine hub maintenance auxiliary system provided by the present invention comprises:

[0021] A collection device, used to collect the locking status information of the wind turbine rotor locking pin;

[0022] A switching device is used to control the hub door cover to switch to an open state when the result of the locking status information is yes, and to control the state of the wind turbine to switch to a shutdown maintenance state; when the result of the locking status information is no, the hub door cover is controlled to switch to a closed state, and to control the state of the wind turbine to switch to an operating state.

[0023] Preferably, in the above-mentioned wind turbine hub maintenance auxiliary system, the acquisition device is a limit switch installed on the wind wheel locking pin.

[0024] Preferably, in the above-mentioned wind turbine hub maintenance auxiliary system, the switching device includes a PLC connected to the limit switch, and a relay connected to the PLC.

[0025] Preferably, in the above-mentioned wind turbine hub maintenance auxiliary system, the switching device also includes an electromagnetic lock connected to the relay and installed on the hub door cover.

[0026] From the above description, it can be known that the above-mentioned wind turbine hub maintenance auxiliary method provided by the present invention includes collecting the locking status information of the wind turbine rotor locking pin; when the result of the locking status information is yes, controlling the hub door cover to switch to the open state; controlling the state of the wind turbine to switch to the shutdown maintenance state; when the result of the locking status information is no, controlling the hub door cover to switch to the closed state; controlling the state of the wind turbine to switch to the running state. It can be seen that this method associates the locking status information of the wind turbine rotor locking pin with the switch state of the hub door cover, so it can ensure that after the unit is shut down and before the staff enters the hub for operation, the wind turbine rotor locking pin is in a completely locked state, the electromagnetic lock on the hub door cover is opened, and the unit is in a shutdown maintenance state, ensuring the personal safety of the staff and the safe and stable operation of the unit, and avoiding damage to the wind turbine rotor. The above-mentioned wind turbine hub maintenance auxiliary system provided by the present invention has the same advantages as the above-mentioned method. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0028] Figure 1 A schematic diagram of an embodiment of a wind turbine hub maintenance auxiliary method provided by the present invention;

[0029] Figure 2 A schematic diagram of an embodiment of a wind turbine hub maintenance auxiliary system provided by the present invention;

[0030] Figure 3 This is a schematic diagram of the structure of installing a limit switch on the wind wheel locking pin;

[0031] Figure 4 It is a schematic diagram of the structure of the wheel hub door cover and electromagnetic lock. DETAILED DESCRIPTION

[0032] The core of the present invention is to provide a wind turbine hub maintenance auxiliary method and system, which can ensure that after the unit is shut down and before the staff enters the hub to operate, the wind wheel locking pin is in a completely locked state, the electromagnetic lock on the hub door cover is open, and the unit is in a shutdown maintenance state, thereby ensuring the personal safety of the staff and the safe and stable operation of the unit, and avoiding damage to the wind wheel.

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] The implementation example of the wind turbine hub maintenance auxiliary method provided by the present invention is as follows: Figure 1 As shown, Figure 1 The present invention provides a schematic diagram of an embodiment of a wind turbine hub maintenance auxiliary method, which may include the following steps:

[0035] S1: Collecting the locking status information of the wind turbine rotor locking pin;

[0036] Specifically, the wind wheel locking pin is used to lock the hub of the unit to ensure that the hub is in a stationary state. The PLC can be used to collect the locking status information, that is, whether the wind wheel is locked. Only when it is locked can personnel perform hub maintenance operations.

[0037] S2: When the result of the locking status information is yes, the wheel hub door cover is controlled to switch to the open state;

[0038] Specifically, when the wind wheel is completely locked, the relevant device can be triggered, so that the locking status information is yes, and the hub door cover can be opened, so that the maintenance personnel can enter the hub channel for maintenance operations while ensuring safety.

[0039] S3: Control the state of the wind turbine generator set to switch to the shutdown maintenance state;

[0040] Specifically, the wind turbine can be controlled to enter a shutdown maintenance state and will no longer work, thereby ensuring that no unexpected situations occur and further ensuring the safety of maintenance personnel.

[0041] S4: When the result of the locking state information is no, the wheel hub door cover is controlled to switch to a closed state;

[0042] It should be noted that in this case, when the wind wheel locking pin is not locked, the hub door cover is kept in a closed state, so that maintenance personnel cannot enter the hub for maintenance, thereby avoiding danger.

[0043] S5: Control the state of the wind turbine generator set to switch to the running state.

[0044] It should be noted that if maintenance cannot be performed at this time, the wind turbine can be operated, which makes the operation safer and will not harm the maintenance personnel.

[0045] From the above description, it can be seen that in the embodiment of the above-mentioned wind turbine hub maintenance auxiliary method provided by the present invention, since it includes collecting the locking status information of the wind turbine rotor locking pin; when the result of the locking status information is yes, controlling the hub door cover to switch to the open state; controlling the state of the wind turbine to switch to the shutdown maintenance state; when the result of the locking status information is no, controlling the hub door cover to switch to the closed state; controlling the state of the wind turbine to switch to the running state, it can be seen that this method associates the locking status information of the wind turbine rotor locking pin with the switching state of the hub door cover, thereby ensuring that after the unit is shut down and before the staff enters the hub for operation, the wind turbine rotor locking pin is in a completely locked state, the electromagnetic lock on the hub door cover is open, and the unit is in a shutdown maintenance state, thereby ensuring the personal safety of the staff and the safe and stable operation of the unit, and avoiding damage to the wind turbine rotor.

[0046] In a specific embodiment of the above-mentioned wind turbine hub maintenance auxiliary method, before collecting the locking state information of the wind turbine rotor locking pin, the following steps may also be included:

[0047] The locking state information is generated by utilizing the triggering action of the limit switch installed on the wind wheel locking pin.

[0048] Specifically, the limit switch is used to monitor the locking stroke of the wind wheel locking pin. It is installed at the rear end of the wind wheel locking pin bearing seat through an installation bracket. A trigger bracket is installed on the wind wheel locking pin. The limit switch stroke trigger position is determined according to the depth of the locking hole corresponding to the locking pin. When the locking pin completely enters the locking hole and locks, the limit switch is triggered, and a switch signal is input to the unit PLC module at the same time. The locking pin state in the unit control system becomes locked. Based on this, the switch control of the hub door cover can be realized. Of course, other methods can be used to generate locking state information according to actual needs, which is not limited here.

[0049] In another specific embodiment of the above-mentioned auxiliary method for the maintenance of the hub of the wind turbine, the control of switching the hub door cover to the open state can be specifically: opening the electromagnetic lock on the hub door cover. In this case, the hub door cover is a necessary way to the hub, so the switch state of the hub door cover can be switched more conveniently and efficiently, and the switch is more accurate without misjudgment. In this way, the electromagnetic lock of the hub door cover can be opened only after the wind wheel is locked, and the maintenance personnel can enter the hub from the hub door cover for maintenance, ensuring that everything is safe. Of course, other control methods can be selected according to actual needs, which are not limited here. Moreover, the control of the state of the wind turbine to switch to the shutdown maintenance state can be: using PLC to control the state of the wind turbine to switch to the shutdown maintenance state. In this case, the PLC can be used to directly switch the state of the wind turbine, and the wind turbine can be allowed to enter the shutdown maintenance state when the wind turbine is locked, so that it will not run in the maintenance state and hurt the maintenance personnel. It can be seen that this PLC can realize automatic control and improve maintenance efficiency. Of course, other methods can be selected according to actual needs, which are not limited here.

[0050] In another specific embodiment of the above-mentioned auxiliary method for the maintenance of the hub of a wind turbine, controlling the hub door cover to switch to a closed state can be specifically: closing the electromagnetic lock on the hub door cover. In this case, using the electromagnetic lock to close the hub door cover makes the adjustment more efficient and accurate, so that when the unit is operating normally, it can be ensured that maintenance personnel cannot enter the hub to ensure the safety of personnel. Moreover, controlling the state of the wind turbine to switch to the operating state can be: using PLC to control the state of the wind turbine to switch to the operating state, so that automatic switching can be achieved, the accuracy and efficiency of the switching can be ensured, the safety of the maintenance personnel can be fully guaranteed, and the unit can be automatically operated immediately after the maintenance is completed.

[0051] The present invention also provides an implementation example of a wind turbine hub maintenance auxiliary system. Figure 2 As shown, Figure 2 A schematic diagram of an embodiment of a wind turbine hub maintenance auxiliary system provided by the present invention, the system may include:

[0052] A collection device 201 is used to collect the locking status information of the wind turbine rotor locking pin;

[0053] The switching device 202 is used to control the hub door cover to switch to the open state when the result of the locking status information is yes, and control the state of the wind turbine to switch to the shutdown maintenance state; when the result of the locking status information is no, control the hub door cover to switch to the closed state, and control the state of the wind turbine to switch to the running state.

[0054] Specifically, the solution is to first collect information on whether the wind rotor locking pin is locked, and then switch the hub door cover and the wind turbine status based on the information, so as to ensure that when the maintenance personnel enter the hub channel, the wind rotor locking pin has been locked in place, and the wind turbine will not rotate during the maintenance process, thereby ensuring the safety of personnel during the maintenance process.

[0055] From the above description, it can be seen that the above-mentioned wind turbine hub maintenance auxiliary system can ensure that after the unit is shut down and before the staff enters the hub to operate, the wind wheel locking pin is in a completely locked state, the electromagnetic lock on the hub door cover is open, and the unit is in a shutdown maintenance state, thereby ensuring the personal safety of the staff and the safe and stable operation of the unit, and avoiding damage to the wind wheel.

[0056] In a specific embodiment of the above-mentioned wind turbine hub maintenance auxiliary system, the acquisition device 201 can be a limit switch installed on the wind rotor locking pin, and the above-mentioned switching device 202 can include a PLC connected to the limit switch and a relay connected to the PLC. When the limit switch of the wind rotor locking pin is triggered, the limit switch trigger signal is fed back to the unit cabin PLC through the action of the relay contact. Specifically, a trigger bracket can be installed on the wind rotor locking pin to trigger the limit switch when the wind rotor is completely locked. At this time, the locking signal can be transmitted to the PLC to realize the opening and closing control of the hub door. Furthermore, the switching device 202 may also include an electromagnetic lock connected to a relay and installed on the wheel hub door cover, so that the switch of the wheel hub door cover can be controlled more accurately and efficiently to ensure correct control. Only when the wind wheel is locked can maintenance personnel open the wheel hub door cover and enter the wheel hub channel for maintenance. When the wind wheel is not locked, the electromagnetic lock on the wheel hub door cover is in a locked state and maintenance personnel cannot open it, so they cannot enter the wheel hub channel for maintenance. It can be seen that this linkage control method is very convenient and efficient, and can better ensure the safety of maintenance work.

[0057] Reference below Figure 3 and Figure 4 , the above wind turbine hub maintenance auxiliary system is described in detail, Figure 3 This is a schematic diagram of the structure of installing a limit switch on the wind wheel locking pin. Figure 4The schematic diagram of the structure of the hub door cover and the electromagnetic lock includes: a wind wheel locking pin bearing seat cover 1, a bolt 2, a washer 3, a protective cover 4, a trigger bracket 5, a limit switch gasket 6, a bolt 7, a washer 8, a nut 9, a limit switch 10, a mounting bracket 11, a wind wheel locking pin 12, a hub door cover 13, a mechanical hinge 14 and an electromagnetic lock 15. Specifically, a trigger bracket 5 is installed on the wind wheel locking pin 12, and the limit switch 10 is triggered when the wind wheel is completely locked. The wind wheel locking pin 12 is used to lock the unit hub to ensure that the hub is in a stationary state. The limit switch 10 is used to monitor the locking stroke of the wind wheel locking pin 12. It is installed at the rear end of the bearing seat of the wind wheel locking pin 12 through the mounting bracket. According to the depth of the corresponding locking hole of the wind wheel locking pin 12, the stroke trigger position of the limit switch 10 is determined. When the wind wheel locking pin 12 completely enters the locking hole and locks, the limit switch 10 is triggered, and the switch signal is input to the unit PLC module at the same time, and the locking pin state in the unit control system changes to locked. The above-mentioned mounting bracket 11 is welded by a flange plate and an L-shaped support plate. The limit switch 10 is fixed on the L-shaped support plate. The entire bracket is fixed to the outer side of the bearing seat cover plate through the flange plate. The bolt holes for fixing the mounting bracket 11 and the limit switch 10 are processed into waist-shaped holes with adjustable distances, which are used to fine-tune the position when installing the limit switch 10. There are threading holes at the bottom of the above-mentioned flange plate and the end of the L-shaped plate. A protective cover is installed on the outside of the cover plate to protect the trigger bracket 5, and the side of the protective cover 4 is processed with threading holes for wire outlet. The limit switch bracket and the protective cover can be fixed to the bearing seat cover plate with bolts. According to the principle of the limit switch action, in order to prevent the wind wheel locking pin 12 from hitting the trigger point of the limit switch 10 and exceeding its maximum stroke to cause damage, a pad is installed on the surface of the trigger end of the limit switch 10 for protection. The pad is coated with glass glue and is tightly attached to the trigger end face of the limit switch 10. When the wind wheel locking pin 12 is fully retracted, the end of the bracket and the end of the wind wheel locking pin 12 will not interfere with each other. The protective cover 4 is used to protect the limit switch 10. When the wind wheel locking pin 12 is fully retracted, the trigger bracket 5 will extend out of the bearing seat cover plate and be protected by the protective cover 4.

[0058] In addition, a relay can be used to realize the interlock between the limit switch and the electromagnetic lock, which is used to lock the hub door cover and is installed at the junction of the cover and the hub air shroud. The hub door cover can be connected to the hub air shroud through a mechanical hinge. PLC can also be used to control the action status of the limit switch 10 and the electromagnetic lock on the hub door, analyze the operating status of the limit switch and the hub door electromagnetic lock, and feed back the operating data to the background SCADA system in real time, so that the background staff can understand the status of the limit switch and the hub door electromagnetic lock in real time.

[0059] In summary, by monitoring the locking state of the wind turbine rotor locking pin and controlling the closing of the hub door cover plate by the locking state of the locking pin, it is more accurate and safer than the traditional scheme of observing the state of the wind turbine rotor locking pin with the naked eye. The locking state of the wind turbine rotor locking pin is fed back through the triggering action of the limit switch, and a program control strategy is formulated. The electromagnetic lock on the hub door cover plate is controlled by the PLC according to the state of the limit switch to ensure the safety of the wind turbine equipment and staff. When the limit switch of the wind turbine rotor locking pin is triggered, the limit switch trigger signal is fed back to the PLC of the unit cabin through the action of the relay contact, and the unit operation state and the electromagnetic lock on the hub channel door are controlled by the PLC, thereby ensuring that the wind turbine rotor locking pin is completely locked, the electromagnetic lock on the hub door cover plate is opened, and the unit is in a shutdown maintenance state before the staff enters the hub for operation, thereby ensuring the personal safety of the staff and the safe and stable operation of the unit.

[0060] In addition, a specific implementation scheme may be as follows:

[0061] The hub entrance door is installed on the channel of the nacelle into the hub by using two common hinges and rivets according to the holes opened on the nacelle cover on site; the electromagnetic lock is installed on the hub door cover, and the electromagnetic lock is unlocked when the power is off. It belongs to the continuous power supply type. The power supply circuit is connected in series with the wind wheel locking pin position feedback circuit. When the wind wheel locking pin is locked, the electromagnetic lock is powered off and the lock tongue is retracted before the hub entrance door can be opened; a limit switch is added on both sides of the front bearing seat of the unit main shaft, and the mounting bracket is welded by a flange plate and an L-shaped support plate. The limit switch is fixed on the L-shaped support plate, and the entire bracket is fixed to the outside of the bearing seat cover plate through the flange plate. The bolt hole for fixing the bracket and the limit switch is processed into a waist-shaped hole with adjustable distance, which is used to fine-tune the position when installing the limit switch. There are threading holes at the bottom of the flange plate and the end of the L-shaped plate. A protective cover is installed on the outside of the cover plate to protect the trigger bracket, and a threading hole is processed on the side of the protective cover for wire outlet. The limit switch bracket and protective cover are fixed to the bearing seat cover plate with bolts. According to the action principle of the limit switch, in order to prevent the wind wheel locking pin from hitting the limit switch trigger point and exceeding its maximum stroke to cause damage, a pad is installed on the surface of the limit switch trigger end for protection. The limit switch wiring can be routed through the cage bridge in the cabin together with the yaw motor cable wiring until it is routed to the inside of the cabin control cabinet; the electromagnetic lock wiring can be routed along the cabin wall to the cabin light circuit breaker, and then routed to the inside of the control cabinet together. The cabin wall wiring part uses a cable fixing frame to fix the cable, and the installation position is equipped with a Ф3.2 hole, and the cable fixing frame is fixed with self-tapping screws. Add a new terminal block inside the control cabinet to determine the DI point on the PLC; connect the wind wheel lock limit switch signal to the main control PLC, monitor the position of the wind wheel locking pin, and when the wind wheel is fully locked, the hub electromagnetic lock is opened, and when the wind wheel is not fully locked, the hub electromagnetic lock is closed. The unit uploads the signal to SCADA and displays the status on the SCADA interface.

[0062] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A wind turbine hub maintenance auxiliary method, It is characterized in that include: A trigger bracket is installed on the wind wheel locking pin, and the limit switch is installed at the rear end of the bearing seat of the wind wheel locking pin through the mounting bracket. The travel trigger position of the limit switch is determined according to the depth of the locking hole corresponding to the wind wheel locking pin. The limit switch is used to monitor the locking travel of the wind wheel locking pin. When the wind wheel locking pin completely enters the locking hole and is locked, the limit switch is triggered and a switch signal is input to the PLC at the same time, and the locking pin state in the wind turbine control unit changes to locked; The locking state information is generated by triggering the limit switch installed on the wind wheel locking pin; Collecting the locking status information of the wind turbine rotor locking pin; When the result of the locking state information is yes, controlling the wheel hub door cover to switch to an open state; Use PLC to control the state of the wind turbine to switch to shutdown maintenance state; When the result of the locking state information is no, controlling the wheel hub door cover to switch to a closed state; Use PLC to control the state of the wind turbine to switch to the operating state.

2. The wind turbine hub maintenance auxiliary method according to claim 1, It is characterized in that The control wheel hub door cover is switched to the open state as follows: Open the electromagnetic lock on the wheel hub door cover.

3. The wind turbine hub maintenance auxiliary method according to claim 1, It is characterized in that The control wheel hub door cover is switched to the closed state as follows: Close the electromagnetic lock on the wheel hub door cover.

4. A wind turbine hub maintenance auxiliary system, It is characterized in that include: A collection device, used to collect the locking status information of the wind turbine rotor locking pin; A switching device, used for controlling the hub door cover to switch to an open state and controlling the state of the wind turbine generator set to switch to a shutdown maintenance state when the result of the locking state information is yes, and controlling the hub door cover to switch to a closed state and controlling the state of the wind turbine generator set to switch to a running state when the result of the locking state information is no; The acquisition device is a limit switch installed on the wind wheel locking pin, and also includes a trigger bracket installed on the wind wheel locking pin. The limit switch is installed at the rear end of the bearing seat of the wind wheel locking pin through the mounting bracket. The limit switch is used to monitor the locking stroke of the wind wheel locking pin. The wind wheel locking pin is used to be triggered after fully entering the locking hole and locking, and at the same time input a switch signal to the PLC to change the state of the locking pin in the wind turbine control unit to locked.

5. The wind turbine hub maintenance auxiliary system according to claim 4, It is characterized in that The switching device includes a PLC connected to the limit switch, and a relay connected to the PLC.

6. The wind turbine hub maintenance auxiliary system according to claim 5, It is characterized in that The switching device also includes an electromagnetic lock connected to the relay and installed on the wheel hub door cover.

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