Maintenance test device of variable pitch system

Abstract

The utility model provides an overhaul testing device of a variable pitch system, which is convenient for carrying out accurate fault detection and performance evaluation on the variable pitch system in an off-site environment, improving the overhaul efficiency and accuracy of the variable pitch system and reducing the uncertainty and repair rate in the maintenance process, and comprises a variable pitch motor driving damping unit, a variable pitch motor driving damping unit and a variable pitch motor driving damping unit, the variable-pitch motor is connected with the brake, the brake is used for simulating the load of the variable-pitch motor, and a torque sensor is further arranged between the variable-pitch motor and the brake; the variable-pitch driving unit comprises a variable-pitch driver, and the variable-pitch driver is connected with the variable-pitch motor driving damping unit and is used for driving the variable-pitch motor to test; the variable-pitch battery manager is connected with the variable-pitch driver, the variable-pitch battery manager is connected with a power supply, and the variable-pitch battery manager can supply power to the variable-pitch driver; the variable-pitch driving unit and the variable-pitch motor driving damping unit are respectively mounted on the test workbench.

Description

Technical Field

[0001] The utility model relates to the technical field of wind power variable pitch systems, and in particular to a maintenance and testing device for variable pitch systems. Background Art

[0002] In recent years, with the adjustment of global energy structures and increasingly severe environmental issues, wind power generation has attracted widespread attention as a clean, renewable energy source. In wind power generation systems, the variable pitch system is a key component for ensuring the safe operation and power generation efficiency of wind turbines. It is responsible for adjusting the angle of the blades according to changes in wind speed, ensuring that the wind turbine can maintain optimal operating conditions under various operating conditions, maximizing power generation efficiency, and protecting the wind turbine from damage.

[0003] The stability and reliability of pitch system performance are crucial. However, in actual operation, due to factors such as harsh operating environments and heavy workloads, the battery manager and motor driver in the pitch system often experience various faults, leading to performance degradation or even failure, directly impacting the safe operation and economic efficiency of wind turbines.

[0004] Currently, maintenance of pitch battery managers and pitch motor drives primarily relies on experienced technicians through on-site disassembly, testing, and replacement. This approach is not only inefficient, but also often fails to accurately identify fault causes due to a lack of systematic testing and simulation. This leads to poor repair quality, increased repair returns, and difficulty in accurately locating faults and efficiently repairing them. Furthermore, on-site repairs increase worker workload and safety risks.

[0005] In view of the problems existing in the existing technology, developing a maintenance test device that can simulate the actual working conditions of the variable pitch system and perform comprehensive and accurate testing and diagnosis of the battery manager and motor driver is of great significance to improving the reliability and maintenance efficiency of the variable pitch system of wind turbines. Utility Model Content

[0006] In response to the above problems, the utility model provides a maintenance and testing device for a variable pitch system, so as to facilitate accurate fault detection and performance evaluation of the variable pitch system in an off-site environment, improve the efficiency and accuracy of the variable pitch system maintenance, and reduce the uncertainty and rework rate during the maintenance process.

[0007] The technical solution is as follows: a maintenance and testing device for a pitch system, characterized by comprising:

[0008] a pitch motor drive damping unit, the pitch motor drive damping unit including a pitch motor, the pitch motor being connected to a brake, the brake being used to simulate the load of the pitch motor, and a torque sensor being further provided between the pitch motor and the brake, the torque sensor being used to detect the load capacity of the pitch drive;

[0009] Pitch drive unit, including:

[0010] a pitch drive connected to the pitch motor drive damping unit and configured to drive the pitch motor for testing;

[0011] A pitch battery manager, the pitch battery manager being connected to the pitch drive and connected to a power source, and the pitch battery manager being capable of supplying power to the pitch drive;

[0012] A test workbench, on which the pitch drive unit and the pitch motor drive damping unit are respectively installed.

[0013] Furthermore, the pitch drive unit also includes a backup power supply, which is connected to the pitch battery manager.

[0014] Furthermore, the test workbench includes a multi-layer main frame, a platform base plate is provided on the lower layer of the multi-layer main frame, a storage cabinet is also provided on one side of the lower layer of the multi-layer main frame, the variable pitch motor drive damping unit is installed on the platform base plate, the upper end of the multi-layer main frame is provided with a mounting backplate, the variable pitch drive unit is installed on the mounting backplate, and a wire management groove is also provided on the mounting backplate.

[0015] Furthermore, protective covers are provided on the mounting back plate respectively corresponding to the pitch battery manager and the pitch driver, and heat dissipation holes are distributed on the protective covers.

[0016] Furthermore, the brake is connected to the pitch motor through a coupling, the pitch motor is horizontally mounted on the platform base plate through a motor bracket, the torque sensor is mounted on the platform base plate through a sensor support frame, the brake is arranged on the brake support frame, the pitch motor, the torque sensor and the brake are mounted at the same height, and the brake adopts a magnetic powder brake.

[0017] Furthermore, it also includes a controller, which is connected to the brake and the torque sensor, and can drive the brake and the torque sensor and record the torque data detected by the torque sensor.

[0018] Furthermore, the power supply includes a three-phase power supply and a 24V power supply. The three-phase power supply is connected to the air switch Q1 and then to the power input end of the pitch battery manager. The backup power supply is connected to the switch Q2 and then to the power input end of the pitch battery manager. A switch Q3 is provided between the 24V power supply and the mains power. The 24V power supply is connected to the switch Q4 and then to the power input end of the pitch battery manager. The power output end of the pitch battery manager is connected to the power input end of the pitch drive.

[0019] Furthermore, the backup power supply includes a plurality of batteries connected in series, and the batteries are also connected to the battery detection port of the pitch battery manager.

[0020] Furthermore, the pitch battery manager is connected to the pitch drive via a CAN bus, a fuse is connected between the power output end of the pitch battery manager and the power input end of the pitch drive, the pitch battery manager also includes a 24V output port, the 24V output port is connected to the EFC emergency pitch port of the pitch drive and the pitch battery manager, the axle box temperature measurement port and the hub central control box temperature port of the pitch battery manager are respectively connected to sensor resistors for simulating the working conditions of the pitch battery manager.

[0021] Furthermore, the three-phase output port of the pitch drive is connected to the pitch motor, the motor encoder port and blade encoder port of the pitch drive are respectively used to connect the encoder and blade encoder of the pitch motor, the brake port of the pitch drive is used to connect the brake of the pitch motor, and the motor temperature detection port of the pitch drive is used to connect the motor temperature detection port of the pitch motor.

[0022] Furthermore, the 24V output port of the pitch battery manager is respectively connected to one end of the controlled switches S1, S2, S3, and S4, and the controlled switches S1, S2, S3, and S4 are connected to the input port of the pitch drive. The controlled switches S1, S2, S3, and S4 can be controlled to close and input signals into the pitch drive to simulate the input state of the pitch drive.

[0023] The maintenance and testing device for the variable pitch system of the utility model is equipped with an electrical circuit that simulates the entire variable pitch system and can simulate the actual working conditions of the variable pitch device, so as to facilitate accurate fault detection and performance evaluation of the variable pitch battery manager and the variable pitch motor driver in the variable pitch system in an off-site environment. The data collected by the torque sensor can reflect the actual working conditions of the driver, the variable pitch battery manager and the variable pitch motor more quickly and accurately, thereby improving the efficiency and accuracy of the maintenance of the variable pitch battery manager and the variable pitch motor driver, reducing the uncertainty and rework rate in the maintenance process, and reducing the workload and safety risks of on-site operators.

[0024] By setting up a test workbench, the test platform can be miniaturized, which makes it convenient to conduct tests in different work sites and to change the work site for testing, thereby improving the flexibility and applicability of the platform. The reasonable layout of the variable pitch drive unit and the variable pitch motor drive damping unit on the test workbench makes the platform design more compact and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a system block diagram of a maintenance and testing device for a pitch system in an embodiment;

[0026] Figure 2 A system composition block diagram of a maintenance and testing device for a pitch system in one embodiment;

[0027] Figure 3 A system composition block diagram of a maintenance and testing device for a pitch system in another embodiment;

[0028] Figure 4 is a perspective view of a maintenance and testing device for a pitch system in an embodiment from a first perspective;

[0029] Figure 5 is a perspective view of the maintenance and testing device for the pitch system in the embodiment from a second perspective;

[0030] Figure 6 This is a circuit diagram of the power supply part of the maintenance and testing device for the pitch system in the embodiment;

[0031] Figure 7 A circuit diagram of a pitch battery manager of a maintenance and testing device for a pitch system in an embodiment;

[0032] Figure 8 A circuit diagram of a pitch drive of a maintenance and testing device for a pitch system in an embodiment;

[0033] Figure 9 is a circuit diagram of a maintenance and testing device for a pitch system in an embodiment;

[0034] Figure 10 Schematic diagram of a switch simulating the input state of a pitch drive in an embodiment. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments. Those skilled in the art can understand other advantages and functions of the present invention from the contents disclosed in this specification. It should be noted that the following embodiments and features in the embodiments can be combined with each other unless there is a conflict.

[0036] See Figure 1 , Figure 2 , a maintenance and testing device for a pitch system, comprising:

[0037] The pitch motor drives the damping unit 100, which includes a pitch motor 101. The pitch motor 101 is connected to a brake 102. A torque sensor 103 is further provided between the pitch motor 101 and the brake 102. The brake 102 is used to simulate the load of the pitch motor, and the torque sensor is used to detect the load capacity of the pitch drive.

[0038] The pitch drive unit 200 includes:

[0039] Pitch driver 201, which is connected to the pitch motor drive damping unit 100 and is used to drive the pitch motor 101 for testing;

[0040] Pitch battery manager 202, pitch battery manager 202 is connected to pitch driver 201, pitch battery manager 202 is connected to a power source, pitch battery manager 202 can supply power to pitch driver 201, and pitch driver 201 can drive pitch motor 101 and brake 102 for testing;

[0041] See Figure 4 5. In the embodiment, a test bench 300 is provided for the maintenance and testing device of the pitch system, and the pitch drive unit 100 and the pitch motor drive damping unit 200 are respectively installed on the test bench 300.

[0042] The maintenance and testing device of the variable pitch system in the embodiment can simulate the actual working conditions of the variable pitch device, so as to facilitate accurate fault detection and performance evaluation of the variable pitch battery manager and the variable pitch motor driver in an off-site environment, which can improve the efficiency and accuracy of the maintenance of the variable pitch battery manager and the variable pitch motor driver, reduce the uncertainty and return rate in the maintenance process, ensure that the repaired equipment can operate stably in the wind turbine, and help to establish a complete variable pitch system maintenance system and improve the overall operation and maintenance level; the maintenance and testing device of the variable pitch system in the embodiment will greatly reduce the workload of on-site operators, improve the judgment of the working condition of the driver, support direct detection on the platform without the need to install it on the wind turbine for testing, and can perform comprehensive diagnosis and analysis of the performance of the driver, thereby improving the troubleshooting efficiency of maintenance personnel.

[0043] In one embodiment, the test workbench includes a multi-layer main frame 301, which is provided with two layers. A platform base plate 302 is further provided on the lower layer of the multi-layer main frame 301. The platform base plate 302 can be a wooden flat plate. The pitch motor drives the damping unit 100 to be installed on the platform base plate 302; the pitch motor 101 is horizontally installed on the platform base plate 302 through a motor bracket 308, the torque sensor 103 is installed on the platform base plate 302 through a sensor support frame 309, and the brake 102 is provided on a brake support frame 307 to realize the connection between the pitch motor and the torque sensor and the brake. The brake is installed at the same height as the rotor, and the brake support frame 307 and the motor support 308 fixing bracket can be of integrated design or of separate design; the brake adopts a magnetic powder brake, and the brake 102 is connected to the pitch motor 101 through a coupling 102. The pitch motor drive damping unit can be used to test the load capacity of the driver and simulate the overcurrent fault of the driver. The pitch motor drive damping unit in the embodiment has excellent dynamic balancing performance, and the pitch motor can test the actual load capacity at high speed, complete the performance test of the pitch motor and the driver, and ensure that the tested equipment can operate stably on the wind turbine.

[0044] A storage cabinet 303 is also provided on one side of the lower platform of the multi-layer main frame 301 for storing commonly used tools, maintenance consumables and drawing-related materials. The multi-layer main frame 301 can be easily moved and can also be designed with casters; the setting of the test workbench realizes the miniaturization and portability of the test platform, which is convenient for testing work in different work sites.

[0045] The upper platform of the multi-layer main frame 301 can generally be provided with a wooden flat plate, and the surface is treated with anti-static treatment. A mounting backboard 304 is provided at the upper end of the multi-layer main frame 301, and the pitch drive unit 100 is installed on the mounting backboard 304. The mounting backboard 304 adopts a wooden panel to increase the insulation performance and perform fireproof and anti-static treatment. Part of the backboard of the mounting backboard 304 reserves space for the subsequent expansion of the power distribution device. A wire management groove 310 is also provided on the mounting backboard 304.

[0046] In one embodiment, protective covers 305 are provided on the mounting back plate 304 corresponding to the pitch battery manager 202 and the pitch driver 201 , respectively. Heat dissipation holes 306 are evenly distributed on the protective covers 305 .

[0047] See Figure 3 In one embodiment, the pitch drive unit 200 also includes a backup power supply 203, which is connected to the pitch battery manager 202 and is used to maintain the operation of the system in the event of a grid failure or emergency. The setting of the backup power supply 203 can restore the actual situation of the wind turbine pitch system.

[0048] In one embodiment, a controller 104 is further included. The controller 104 is connected to the brake 102 and the torque sensor 103. The controller 104 can drive the brake 102 and the torque sensor 103 and record the torque data detected by the torque sensor 103. The controller 104 in the embodiment can be a PLC device or an industrial PC.

[0049] The data collected by the torque sensor can reflect the actual working conditions of the drive, pitch battery manager and pitch motor more quickly and accurately, providing comprehensive and effective data support for subsequent equipment maintenance and processing, reducing the probability of rework, and can conduct a comprehensive diagnosis and analysis of the drive's performance. The controller's display panel can directly pop up faults, improving the troubleshooting efficiency of maintenance personnel.

[0050] In the embodiment, after the pitch motor drive damping unit 100 and the pitch drive unit 200 are fixed, the electrical connection between the motor drive damping unit 100 and the pitch drive unit 200 is also included, such as Figure 6 As shown, the power supply includes a three-phase power supply and a 24V power supply. The three-phase power supply is connected to the air switch Q1 and then to the power input terminals X18.6, X18.5, and X18.4 of the pitch battery manager. The backup power supply is connected to the switch Q2 and then to the power input terminals X19.3 and X19.4 of the pitch battery manager. A switch Q3 is provided between the 24V power supply and the mains power. The 24V power supply is connected to the switch Q4 and then to the power input terminal of the pitch battery manager. The power output terminals X19.5 and X19.6 of the pitch battery manager are connected to the power input terminals X8:3 and X8:2 of the pitch drive.

[0051] See Figure 10 In the embodiment, the backup power supply includes several batteries 1, battery 2, battery 3, battery 4, battery 6, and battery 6 connected in series. Battery 1, battery 2, battery 3, battery 4, battery 6, and battery 6 are also connected to the battery detection port X17 of the pitch battery manager.

[0052] See Figure 7 、 8In the embodiment, precise control and signal acquisition of the pitch drive and battery manager can be achieved. The X11 port of the pitch battery manager and the X1 port of the pitch drive are connected through a CAN bus. Smooth data exchange is achieved through CAN communication, thereby improving the accuracy of fault simulation. A fuse F1 is connected between the power output terminal X19.6 of the pitch battery manager and the power input terminal X8:2 of the pitch drive. The pitch battery manager also includes a 24V output port, one of which, X20:4, is connected to the EFC emergency feathering port X2:3 of the pitch drive and the EFC emergency feathering port X13:10 of the pitch battery manager. The axle box temperature measurement port X15:1 and X15:2 of the pitch battery manager and the wheel hub central control box temperature port are respectively connected to sensor resistors R1 and R2 for simulating the working conditions of the pitch battery manager.

[0053] See Figure 7 、 8 The three-phase output ports X9:1, X9:2, and X9:3 of the pitch drive are connected to the pitch motor. The motor encoder port X5 and the blade encoder port X3 of the pitch drive are used to connect the encoder and blade encoder of the pitch motor respectively. The brake ports X6:3 and X6:4 of the pitch drive are used to connect the brake of the pitch motor. The motor temperature detection ports X6:1 and X6:2 of the pitch drive are used to connect the motor temperature detection port of the pitch motor, which are used to restore the actual connection status of the pitch motor and the pitch drive.

[0054] See Figure 9 The 24V output ports of the pitch battery manager are respectively connected to one end of the controlled switches S1, S2, S3, and S4, and the controlled switches S1, S2, S3, and S4 are connected to the input ports of the pitch drive. The controlled switches S1, S2, S3, and S4 are respectively used to simulate the input status of the pitch drive. These input ports can simulate the status of various fault inputs of the wind turbine, and fully present the actual fault points in the pitch system.

[0055] The maintenance and testing device for the variable pitch system in the embodiment can accurately simulate the load capacity and overcurrent fault of the driver, thereby improving the accuracy of fault detection; the electrical circuit is reasonably designed and can fully access the functions of the driver and the variable pitch battery manager. The tested equipment will not miss any test, and all actual working data will be collected. The actual fault points in the variable pitch system can be fully presented, ensuring that the test is not missed and improving the reliability of the test results.

[0056] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be embraced within the present invention.

[0057] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A maintenance and testing device for a pitch system, characterized in that: include: a pitch motor drive damping unit, the pitch motor drive damping unit including a pitch motor, the pitch motor being connected to a brake, the brake being used to simulate the load of the pitch motor, and a torque sensor being further provided between the pitch motor and the brake, the torque sensor being used to detect the load capacity of the pitch drive; Pitch drive unit, including: a pitch drive connected to the pitch motor drive damping unit and configured to drive the pitch motor for testing; A pitch battery manager, the pitch battery manager being connected to the pitch drive and connected to a power source, and the pitch battery manager being capable of supplying power to the pitch drive; A test workbench, on which the pitch drive unit and the pitch motor drive damping unit are respectively installed.

2. A maintenance and testing device for a pitch system according to claim 1, characterized in that: The pitch drive unit further includes a backup power supply, which is connected to the pitch battery manager.

3. The maintenance and testing device for a pitch system according to claim 1, characterized in that: The test workbench includes a multi-layer main frame, a platform base plate is provided on the lower layer of the multi-layer main frame, a storage cabinet is also provided on one side of the lower layer of the multi-layer main frame, the pitch motor drive damping unit is installed on the platform base plate, the upper end of the multi-layer main frame is provided with a mounting backplate, the pitch drive unit is installed on the mounting backplate, a wire management groove is also provided on the mounting backplate, and protective covers are respectively provided on the mounting backplate corresponding to the pitch battery manager and the pitch drive, and heat dissipation holes are evenly distributed on the protective covers.

4. The maintenance and testing device for a pitch system according to claim 3, characterized in that: The brake is connected to the pitch motor through a coupling, the pitch motor is horizontally mounted on the platform base plate through a motor bracket, the torque sensor is mounted on the platform base plate through a sensor support frame, the brake is arranged on the brake support frame, the pitch motor, the torque sensor and the brake are mounted at the same height, and the brake adopts a magnetic powder brake.

5. The maintenance and testing device for a pitch system according to claim 1, characterized in that: The invention further comprises a controller connected with the brake and the torque sensor. The controller is capable of driving the brake and the torque sensor and recording torque data detected by the torque sensor.

6. The maintenance and testing device for a pitch system according to claim 2, characterized in that: The power supply includes a three-phase power supply and a 24V power supply. The three-phase power supply is connected to the air switch Q1 and then to the power input end of the pitch battery manager. The backup power supply is connected to the switch Q2 and then to the power input end of the pitch battery manager. A switch Q3 is provided between the 24V power supply and the mains power. The 24V power supply is connected to the switch Q4 and then to the power input end of the pitch battery manager. The power output end of the pitch battery manager is connected to the power input end of the pitch drive.

7. The maintenance and testing device for a pitch system according to claim 2, characterized in that: The backup power supply includes a plurality of batteries connected in series, and the batteries are also connected to the battery detection port of the pitch battery manager.

8. The maintenance and testing device for a pitch system according to claim 6, characterized in that: The pitch battery manager is connected to the pitch drive via a CAN bus. A fuse is connected between the power output end of the pitch battery manager and the power input end of the pitch drive. The pitch battery manager also includes a 24V output port, which is connected to the EFC emergency pitch port of the pitch drive and the pitch battery manager. The axle box temperature measurement port and the wheel hub central control box temperature port of the pitch battery manager are respectively connected to sensor resistors for simulating the working conditions of the pitch battery manager.

9. The maintenance and testing device for a pitch system according to claim 8, characterized in that: The three-phase output port of the pitch drive is connected to the pitch motor, the motor encoder port and blade encoder port of the pitch drive are respectively used to connect the encoder and blade encoder of the pitch motor, the brake port of the pitch drive is used to connect the brake of the pitch motor, and the motor temperature detection port of the pitch drive is used to connect the motor temperature detection port of the pitch motor.

10. The maintenance and testing device for a pitch system according to claim 8, characterized in that: The 24V output port of the pitch battery manager is respectively connected to one end of the controlled switches S1, S2, S3, and S4, and the controlled switches S1, S2, S3, and S4 are connected to the input port of the pitch drive. The controlled switches S1, S2, S3, and S4 can be controlled to close and input signals into the pitch drive to simulate the input state of the pitch drive.

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