Ultrasonic detection device and method for main beam of fan blade

Abstract

The invention provides an ultrasonic detection device and method for a main beam of a fan blade, and the device comprises a fixed frame which is disposed on a to-be-detected blade in a sleeving manner. A pulley assembly is mounted on the fixing frame and is in contact with the upper surface of the blade to be detected; the fixing frame is also provided with two ultrasonic detection assemblies, and the two ultrasonic detection assemblies are respectively contacted with the upper surface and the lower surface of the to-be-detected blade; the ultrasonic probe moves back and forth through the pulley assembly, so that the ultrasonic probe can completely cover the width of the blade main beam, and the problem of missing detection in the fan blade main beam detection in the prior art is solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of nondestructive testing, and in particular relates to an ultrasonic testing device and method for a main beam of a fan blade. Background Art

[0002] In recent years, with the increase in the installed capacity of a single wind turbine, the direct increase in the size of the wind turbine blades has continued. In addition, with the decrease in the manufacturing level of the wind turbine, the blade stiffness has decreased, the bending degree has increased, and the blade main beam has frequently broken. If cracks appear in the blade main beam, it will directly cause the blade to break, and even cause major accidents such as the collapse of the wind turbine tower and casualties. Therefore, it is more important to perform non-destructive testing on the blade main beam in daily inspection work and to detect small defects in the blade operation in advance.

[0003] At present, the main inspection method for blade main beams is internal and external macroscopic inspection. Due to the obstruction of paint film on the outside of the main beam and the obstruction of web adhesive on the inside, small defects inside the main beam cannot be found with the naked eye. A few units use manual ultrasonic testing to conduct ultrasonic testing on blade main beams, but this method requires the installation of a hanging basket or crane to lift the inspectors around the blades, which poses a great safety hazard to personnel. In addition, the manual ultrasonic testing method is a great test of the technical ability of personnel, and cannot ensure the complete detection of defects in the blade main beam, resulting in missed defects. Summary of the invention

[0004] The purpose of the present invention is to provide an ultrasonic detection device and method for a fan blade main beam, which solves the problem of missed detection in the fan blade main beam detection in the prior art.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is: The present invention provides an ultrasonic detection device for a fan blade main beam, comprising a fixing frame, wherein the fixing frame is sleeved on a blade to be tested; A pulley assembly is installed on the fixing frame, and the pulley assembly is in contact with the upper surface of the blade to be tested; Two ultrasonic detection components are also installed on the fixing frame, and the two ultrasonic detection components are in contact with the upper surface and the lower surface of the blade to be tested respectively.

[0006] Preferably, the fixing frame comprises an upper bracket and a lower bracket, a connecting beam is fixed to both end portions of the upper bracket and the lower bracket, and the upper bracket and the lower bracket are butt-jointed to form a frame structure.

[0007] Preferably, the pulley assembly includes two pulley blocks, and the two pulley blocks are respectively fixed at two ends of the upper bracket.

[0008] Preferably, the pulley block comprises a fixing member, a first spring is fixed to a free end of the fixing member, the free end of the first spring is fixed to a pulley bracket, a pulley is further mounted on the pulley bracket, and the pulley acts on the upper surface of the blade; The pulley bracket is also provided with a driving motor, and the output shaft of the driving motor is drivingly connected to the pulley.

[0009] Preferably, the ultrasonic detection component includes a mounting piece, which is fixedly mounted on the upper bracket or the lower bracket, a second spring is mounted on the free end of the mounting piece, an ultrasonic detection probe is fixedly connected to the free end of the second spring, and the ultrasonic detection probe acts on the upper surface or the lower surface of the blade.

[0010] Preferably, the pulse signal input end of the ultrasonic detection probe is connected to a power supply and a pulse signal transmitting end of an ultrasonic transmitter.

[0011] Preferably, the ultrasonic output end of the ultrasonic detection probe is connected to a signal receiver and a signal receiving end of a device operator.

[0012] Preferably, the upper bracket and the lower bracket are placed between two connecting beams at the same side end and connected via an annular electromagnet.

[0013] Preferably, the annular electromagnet includes two U-shaped electromagnets, and the two electromagnets are butt-connected.

[0014] An ultrasonic detection method for a fan blade main beam, based on the detection device, comprises the following steps: Step 1, pitch the blade to be tested to 90°; Step 2, hoisting and installing the fixing frame on the outside of the blade to be tested; Step 3: Use an ultrasonic detection component to detect the suction side and pressure side of the blade to be tested respectively to determine whether there are safety hazards in the blade to be tested.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides an ultrasonic detection device for a fan blade main beam, which connects an ultrasonic probe to a fixing frame, so that the ultrasonic probe is pressed against the blade to perform nondestructive detection of the blade main beam. The ultrasonic probe is moved forward and backward by a pulley assembly, so that the ultrasonic probe can completely cover the width of the blade main beam.

[0016] Furthermore, two ultrasonic detection probes are installed to ensure that the suction side and pressure side main beams of the blade can be detected simultaneously, thereby improving the efficiency of ultrasonic detection of the blade main beam.

[0017] Furthermore, electromagnets are installed at both ends of the fixing frame. When the electromagnets are energized, magnetism is generated, and magnetic force is generated between the two electromagnets, which plays a role in stabilizing the fixing frame when encountering severe weather such as strong winds during the detection process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a working diagram of the ultrasonic detection device for the main beam of the fan blade after installation; Among them, 1. blades; 2. electromagnets; 3. fixed frames; 4. pulleys; 5. slide rails; 6. fixing parts; 7. ultrasonic detection probes; 8. power supplies and ultrasonic transmitters; 9. signal receivers and equipment operators. DETAILED DESCRIPTION

[0019] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0020] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or combinations thereof.

[0021] It should also be understood that the term “and / or” used in the specification and appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0022] As used in the specification and appended claims of this application, the term "if" can be interpreted as "when" or "uponce" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrase "if it is determined" or "if [described condition or event] is detected" can be interpreted as meaning "uponce it is determined" or "in response to determining" or "uponce [described condition or event] is detected" or "in response to detecting [described condition or event]", depending on the context.

[0023] In addition, in the description of the present application specification and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.

[0024] References to "one embodiment" or "some embodiments" etc. described in the specification of this application mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0025] Example 1 This embodiment provides an ultrasonic detection device for a main beam of a wind turbine blade, wherein the blade pitch is changed to 90° to ensure that the device can be stably placed on the blade.

[0026] The device specifically comprises a fixing frame, which is sleeved on the blade to be tested; A pulley assembly is installed on the fixing frame, and the pulley assembly is in contact with the upper surface of the blade to be tested; Two ultrasonic detection components are also installed on the fixing frame, and the two ultrasonic detection components are in contact with the upper surface and the lower surface of the blade to be tested respectively.

[0027] Example 2 The present embodiment provides an ultrasonic detection device for a fan blade main beam, comprising a fixing frame 3, a pulley 4, a slide rail 5, a drive motor, an ultrasonic detection probe 7, a power supply and an ultrasonic transmitter 8, a signal receiver and a device operator 9, wherein: The fixing frame 3 includes an upper bracket and a lower bracket. A connecting beam is fixed to both ends of the upper bracket and the lower bracket. The upper bracket and the lower bracket are butt-connected to form a frame structure.

[0028] A pulley set is installed at both ends of the bottom surface of the upper bracket to drive the fixing frame 3 to move along the axial direction of the blade.

[0029] Each pulley block includes a plurality of fixing members 6, and the free end of each fixing member is fixedly connected to a pulley bracket, on which a pulley 4 is also mounted, and the pulley 4 acts on the upper surface of the blade.

[0030] The installation direction of the plurality of fixing members 6 is perpendicular to the axial direction of the blade.

[0031] The pulley bracket is also provided with a driving motor, and the output shaft of the driving motor is drivingly connected to the pulley 4.

[0032] A first mounting piece is fixedly mounted on one end of the upper surface of the lower bracket, and a first ultrasonic detection probe 7 is fixedly mounted on the upper surface of the first mounting piece. The first ultrasonic detection probe 7 acts on the lower surface of the blade.

[0033] A second mounting piece is fixedly mounted on one end of the lower surface of the upper bracket, a second ultrasonic detection probe is fixedly mounted on the lower surface of the second mounting piece, and the second ultrasonic detection probe acts on the upper surface of the blade.

[0034] The power input ends of the driving motor, the first ultrasonic detection probe and the second ultrasonic detection probe are all connected to the power output end of the power supply and the ultrasonic transmitter 8, and the power supply and the ultrasonic transmitter 8 are installed on the upper bracket.

[0035] The pulse signal input ends of the first ultrasonic detection probe and the second ultrasonic detection probe are connected to a power supply and a pulse signal transmitting end of an ultrasonic transmitter 8 .

[0036] The signal receiver and equipment operator 9 is used to receive the ultrasonic wave emitted by the ultrasonic detection probe, and has equipment operation buttons, including OFF1 / ON1, OFF2 / ON2, OFF3 / ON3, OFF4 / ON4, ←, →.

[0037] The working process of this embodiment: The detection blade 1 is pitched to 90°, and then the device is installed on the outside of the blade 1 by other lifting equipment such as a drone to ensure that the device can be placed stably on the blade.

[0038] Then two annular electromagnets are passed from the tip part of the blade; the pulley 4 contacts the upper surface of the blade.

[0039] Then, the power supply and ultrasonic transmitter 8 supply power to the drive motor 6 and provide a pulse signal to the ultrasonic detection probe, and the ultrasonic detection probe begins to perform non-destructive testing on the blade main beam. As the drive motor 6 is controlled to work, the ultrasonic detection probe can move forward and backward. When the area is inspected, the drive motor 6 controls the pulley 4 to move forward and backward, so that the device moves and covers other undetected areas. The detection results are transmitted back to the signal receiver and the equipment operator 9 through the wireless protocol for the inspector to determine whether there are safety hazards.

[0040] Example 3 The present embodiment provides an ultrasonic detection device for a fan blade main beam, comprising a fixing frame 3, a pulley 4, a slide rail 5, a drive motor, an ultrasonic detection probe 7, a power supply and an ultrasonic transmitter 8, a signal receiver and a device operator 9, wherein: The fixing frame 3 includes an upper bracket and a lower bracket. A connecting beam is fixed to both ends of the upper bracket and the lower bracket. The upper bracket and the lower bracket are connected between two connecting beams at the same end through an annular electromagnet.

[0041] The annular electromagnet comprises two U-shaped electromagnets 2, and the two electromagnets 2 are butt-connected.

[0042] A pulley set is installed at both ends of the bottom surface of the upper bracket to drive the fixing frame 3 to move along the axial direction of the blade.

[0043] Each pulley block includes a plurality of fixing members 6, and the free end of each fixing member is fixedly connected to a pulley bracket, on which a pulley 4 is also mounted, and the pulley 4 acts on the upper surface of the blade.

[0044] The installation direction of the plurality of fixing members 6 is perpendicular to the axial direction of the blade.

[0045] The pulley bracket is also provided with a driving motor, and the output shaft of the driving motor is drivingly connected to the pulley 4.

[0046] A first mounting piece is fixedly mounted on one end of the upper surface of the lower bracket, and a first ultrasonic detection probe 7 is fixedly mounted on the upper surface of the first mounting piece. The first ultrasonic detection probe 7 acts on the lower surface of the blade.

[0047] A second mounting piece is fixedly mounted on one end of the lower surface of the upper bracket, a second ultrasonic detection probe is fixedly mounted on the lower surface of the second mounting piece, and the second ultrasonic detection probe acts on the upper surface of the blade.

[0048] The power input ends of the driving motor, the first ultrasonic detection probe and the second ultrasonic detection probe are all connected to the power output end of the power supply and the ultrasonic transmitter 8, and the power supply and the ultrasonic transmitter 8 are installed on the upper bracket.

[0049] The pulse signal input ends of the first ultrasonic detection probe and the second ultrasonic detection probe are connected to a power supply and a pulse signal transmitting end of an ultrasonic transmitter 8 .

[0050] The signal receiver and equipment operator 9 is used to receive the ultrasonic wave emitted by the ultrasonic detection probe, and has equipment operation buttons, including OFF1 / ON1, OFF2 / ON2, OFF3 / ON3, OFF4 / ON4, ←, →.

[0051] The working process of this embodiment: The detection blade 1 is pitched to 90°, and then the device is installed on the outside of the blade 1 by other lifting equipment such as a drone to ensure that the device can be placed stably on the blade.

[0052] Then two annular electromagnets are passed from the tip part of the blade; the pulley 4 contacts the upper surface of the blade.

[0053] The electromagnets 2 generate magnetism when energized, and generate magnetic force between the two electromagnets to stabilize the fixing frame 3.

[0054] Then, the power supply and ultrasonic transmitter 8 supply power to the drive motor 6 and provide a pulse signal to the ultrasonic detection probe, and the ultrasonic detection probe begins to perform non-destructive testing on the blade main beam. As the drive motor 6 is controlled to work, the ultrasonic detection probe can move forward and backward. When the area is inspected, the drive motor 6 controls the pulley 4 to move forward and backward, so that the device moves and covers other undetected areas. The detection results are transmitted back to the signal receiver and the equipment operator 9 through the wireless protocol for the inspector to determine whether there are safety hazards.

[0055] Example 4 The present embodiment provides an ultrasonic detection device for a fan blade main beam, comprising a fixing frame 3, a pulley 4, a slide rail 5, a drive motor, an ultrasonic detection probe 7, a power supply and an ultrasonic transmitter 8, a signal receiver and a device operator 9, wherein: The fixing frame 3 includes an upper bracket and a lower bracket. A connecting beam is fixed to both ends of the upper bracket and the lower bracket. The upper bracket and the lower bracket are connected between two connecting beams at the same end through an annular electromagnet.

[0056] The annular electromagnet comprises two U-shaped electromagnets 2, and the two electromagnets 2 are butt-connected.

[0057] A pulley set is installed at both ends of the bottom surface of the upper bracket to drive the fixing frame 3 to move along the axial direction of the blade.

[0058] Each pulley block includes a plurality of fixing members 6, the free end of each fixing member is fixedly connected to a first spring, the free end of the first spring is fixedly mounted on a pulley bracket, a pulley 4 is also mounted on the pulley bracket, and the pulley 4 acts on the upper surface of the blade.

[0059] The installation direction of the plurality of fixing members 6 is perpendicular to the axial direction of the blade.

[0060] The pulley bracket is also provided with a driving motor, and the output shaft of the driving motor is drivingly connected to the pulley 4.

[0061] A first mounting piece is fixedly mounted on one end of the upper surface of the lower bracket, and a first ultrasonic detection probe 7 is fixedly mounted on the upper surface of the first mounting piece. The first ultrasonic detection probe 7 acts on the lower surface of the blade.

[0062] A second mounting piece is fixedly mounted on one end of the lower surface of the upper bracket, a second ultrasonic detection probe is fixedly mounted on the lower surface of the second mounting piece, and the second ultrasonic detection probe acts on the upper surface of the blade.

[0063] The power input ends of the driving motor, the first ultrasonic detection probe and the second ultrasonic detection probe are all connected to the power output end of the power supply and the ultrasonic transmitter 8, and the power supply and the ultrasonic transmitter 8 are installed on the upper bracket.

[0064] The pulse signal input ends of the first ultrasonic detection probe and the second ultrasonic detection probe are connected to a power supply and a pulse signal transmitting end of an ultrasonic transmitter 8 .

[0065] The signal receiver and equipment operator 9 is used to receive the ultrasonic wave emitted by the ultrasonic detection probe, and has equipment operation buttons, including OFF1 / ON1, OFF2 / ON2, OFF3 / ON3, OFF4 / ON4, ←, →.

[0066] Example 5 The present embodiment provides an ultrasonic detection device for a fan blade main beam, comprising a fixing frame 3, a pulley 4, a slide rail 5, a drive motor, an ultrasonic detection probe 7, a power supply and an ultrasonic transmitter 8, a signal receiver and a device operator 9, wherein: The fixing frame 3 includes an upper bracket and a lower bracket. A connecting beam is fixed to both ends of the upper bracket and the lower bracket. The upper bracket and the lower bracket are connected between two connecting beams at the same end through an annular electromagnet.

[0067] The annular electromagnet comprises two U-shaped electromagnets 2, and the two electromagnets 2 are butt-connected.

[0068] A pulley set is installed at both ends of the bottom surface of the upper bracket to drive the fixing frame 3 to move along the axial direction of the blade.

[0069] Each pulley block includes a plurality of fixing members 6, and a first spring is fixedly connected to the free end of each fixing member. The free end of the first spring is mounted on a pulley bracket, and a pulley 4 is also mounted on the pulley bracket. The pulley 4 acts on the upper surface of the blade.

[0070] The installation direction of the plurality of fixing members 6 is perpendicular to the axial direction of the blade.

[0071] The pulley bracket is also provided with a driving motor, and the output shaft of the driving motor is drivingly connected to the pulley 4.

[0072] A first mounting piece is fixedly provided at one end of the upper surface of the lower bracket, a second spring is fixedly installed on the upper surface of the first mounting piece, a first ultrasonic detection probe 7 is fixed at the free end of the second spring, and the first ultrasonic detection probe 7 acts on the lower surface of the blade.

[0073] A second mounting piece is fixedly provided at one end of the lower surface of the upper bracket, a third spring is fixedly installed on the lower surface of the second mounting piece, a second ultrasonic detection probe is fixed at the free end of the third spring, and the second ultrasonic detection probe acts on the upper surface of the blade.

[0074] The power input ends of the driving motor, the first ultrasonic detection probe and the second ultrasonic detection probe are all connected to the power output end of the power supply and the ultrasonic transmitter 8, and the power supply and the ultrasonic transmitter 8 are installed on the upper bracket.

[0075] The pulse signal input ends of the first ultrasonic detection probe and the second ultrasonic detection probe are connected to a power supply and a pulse signal transmitting end of an ultrasonic transmitter 8 .

[0076] The signal receiver and equipment operator 9 is used to receive the ultrasonic wave emitted by the ultrasonic detection probe, and has equipment operation buttons, including OFF1 / ON1, OFF2 / ON2, OFF3 / ON3, OFF4 / ON4, ←, →.

[0077] Example 6 On the basis of Example 2, the present invention provides an ultrasonic detection device for a fan blade main beam, wherein the ultrasonic detection probe is a φ300 straight probe, which is used to completely cover the width of the blade main beam.

[0078] How this application works: This application changes the pitch of the detection blade to 90° in advance, and then installs the device on the outside of the blade by other lifting equipment such as drones to ensure that the device can be placed stably on the blade. The ultrasonic transmitter then provides a pulse signal to the probe, and the drive motor drives the ultrasonic probe to move back and forth to start ultrasonic testing of the blade main beam. The test results are transmitted back to the signal receiver and the equipment operator through the wireless protocol for the test personnel to determine whether there are any safety hazards.

[0079] Example 4 The present embodiment provides an ultrasonic detection method for a main beam of a wind turbine blade, based on an ultrasonic detection device for a main beam of a wind turbine blade, the device comprising a fixing frame, the fixing frame being mounted on a blade to be detected; A pulley assembly is installed on the fixing frame, and the pulley assembly is in contact with the upper surface of the blade to be tested; Two ultrasonic detection components are also installed on the fixing frame, and the two ultrasonic detection components are in contact with the upper surface and the lower surface of the blade to be tested respectively.

[0080] The fixing frame comprises an upper bracket and a lower bracket, both ends of the upper bracket and the lower bracket are fixed with a connecting beam, and the upper bracket and the lower bracket are connected between two connecting beams at the same side end through an annular electromagnet.

[0081] The annular electromagnet comprises two U-shaped electromagnets, which are butt-connected.

[0082] The pulley assembly comprises two pulley blocks, and the two pulley blocks are respectively fixed at two ends of the upper bracket.

[0083] The pulley block comprises a fixing member, a first spring is fixed to a free end of the fixing member, the free end of the first spring is fixed to a pulley bracket, a pulley is also mounted on the pulley bracket, and the pulley acts on the upper surface of the blade; The pulley bracket is also provided with a driving motor, and the output shaft of the driving motor is drivingly connected to the pulley.

[0084] The ultrasonic detection assembly includes a mounting member, which is fixedly mounted on an upper bracket or a lower bracket, a second spring is mounted on the free end of the mounting member, an ultrasonic detection probe is fixedly connected to the free end of the second spring, and the ultrasonic detection probe acts on the upper surface or the lower surface of the blade.

[0085] The pulse signal input end of the ultrasonic detection probe is connected to a power supply and a pulse signal transmitting end of an ultrasonic transmitter.

[0086] The ultrasonic output end of the ultrasonic detection probe is connected to a signal receiver and a signal receiving end of an equipment operator.

[0087] The following steps are involved: Step 1, pitch the blade to be tested to 90°; Step 2, hoisting and installing the fixing frame on the outside of the blade to be tested; Step 3: Use an ultrasonic detection component to detect the suction side and pressure side of the blade to be tested respectively to determine whether there are safety hazards in the blade to be tested.

[0088] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. An ultrasonic detection device for a fan blade main beam, characterized in that: It comprises a fixing frame, and the fixing frame is sleeved on the blade to be tested; A pulley assembly is installed on the fixing frame, and the pulley assembly is in contact with the upper surface of the blade to be tested; Two ultrasonic detection components are also installed on the fixing frame, and the two ultrasonic detection components are in contact with the upper surface and the lower surface of the blade to be tested respectively.

2. The ultrasonic detection device for a fan blade main beam according to claim 1, characterized in that: The fixing frame comprises an upper bracket and a lower bracket. A connecting beam is fixed to both end portions of the upper bracket and the lower bracket. The upper bracket and the lower bracket are butt-connected to form a frame structure.

3. The ultrasonic detection device for a fan blade main beam according to claim 2, characterized in that: The pulley assembly comprises two pulley blocks, and the two pulley blocks are respectively fixed at two ends of the upper bracket.

4. The ultrasonic detection device for a fan blade main beam according to claim 3, characterized in that: The pulley block comprises a fixing member, a first spring is fixed to a free end of the fixing member, the free end of the first spring is fixed to a pulley bracket, a pulley is also mounted on the pulley bracket, and the pulley acts on the upper surface of the blade; The pulley bracket is also provided with a driving motor, and the output shaft of the driving motor is drivingly connected to the pulley.

5. The ultrasonic detection device for a fan blade main beam according to claim 2, characterized in that: The ultrasonic detection assembly includes a mounting member, which is fixedly mounted on an upper bracket or a lower bracket, a second spring is mounted on the free end of the mounting member, an ultrasonic detection probe is fixedly connected to the free end of the second spring, and the ultrasonic detection probe acts on the upper surface or the lower surface of the blade.

6. The ultrasonic detection device for a fan blade main beam according to claim 5, characterized in that: The pulse signal input end of the ultrasonic detection probe is connected to a power supply and a pulse signal transmitting end of an ultrasonic transmitter.

7. The ultrasonic detection device for a fan blade main beam according to claim 5, characterized in that: The ultrasonic output end of the ultrasonic detection probe is connected to a signal receiver and a signal receiving end of an equipment operator.

8. The ultrasonic detection device for a fan blade main beam according to claim 2, characterized in that: The upper bracket and the lower bracket are placed between two connecting beams at the same side end and connected via an annular electromagnet.

9. The ultrasonic detection device for a fan blade main beam according to claim 8, characterized in that: The annular electromagnet comprises two U-shaped electromagnets, which are butt-connected.

10. An ultrasonic detection method for a fan blade main beam, characterized in that: The detection device according to any one of claims 1 to 8 comprises the following steps: Step 1, pitch the blade to be tested to 90°; Step 2, hoisting and installing the fixing frame on the outside of the blade to be tested; Step 3: Use an ultrasonic detection component to detect the suction side and pressure side of the blade to be tested respectively to determine whether there are safety hazards in the blade to be tested.

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