Micro permanent magnet synchronous wind turbine vibration monitoring and diagnosis device and diagnosis method

Abstract

The present invention discloses a vibration monitoring and diagnostic device and a diagnostic method for a micro permanent magnet synchronous wind generator, comprising a truncated table, wherein a micro permanent magnet synchronous wind generator is arranged directly above the center of the truncated table, an output shaft of the micro permanent magnet synchronous wind generator is fixedly connected with a fan blade, and an auxiliary structure used in conjunction with the truncated table is arranged on the surface of the micro permanent magnet synchronous wind generator. By arranging the auxiliary structure, the micro permanent magnet synchronous wind generator is firstly provided with a stable rotation support, and the micro permanent magnet synchronous wind generator is also clamped and positioned, and vibration monitoring data of the micro permanent magnet synchronous wind generator with or without an external force is inductively collected, and by arranging a monitoring and diagnostic mechanism, external force monitoring conditions of different orientations and sizes are applied to the micro permanent magnet synchronous wind generator, thereby ensuring the accuracy and comprehensiveness of the vibration monitoring data of the micro permanent magnet synchronous wind generator.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation, and in particular to a vibration monitoring and diagnostic device and a diagnostic method for a micro permanent magnet synchronous wind generator. Background Art

[0002] Wind power generation is the conversion of wind kinetic energy into electrical energy. As a clean and renewable energy source, wind energy is increasingly valued by countries around the world. It has huge reserves. The global wind energy is about 2.74×10^9MW, of which 2×10^7MW is usable wind energy, which is 10 times larger than the total amount of exploitable hydropower on Earth. my country has a large amount of wind energy resources, so there are wind turbines of different types and specifications on the market, including micro permanent magnet synchronous wind turbines.

[0003] When inspectors perform vibration monitoring and diagnosis on micro permanent magnet synchronous wind turbines, they need to use a vibration monitoring and diagnosis device. During use, the existing vibration monitoring and diagnosis devices are mostly simple sensor induction monitoring, which cannot accurately and comprehensively monitor the vibration data of the micro permanent magnet synchronous wind turbine under different orientations and different sizes of external forces, which affects the accuracy of the final vibration data of the micro permanent magnet synchronous wind turbine, does not serve as an effective reference, and shortens the service life of the produced micro permanent magnet synchronous wind turbine. Therefore, a vibration monitoring and diagnosis device and a diagnosis method for a micro permanent magnet synchronous wind turbine are proposed. Summary of the invention

[0004] The purpose of the present invention is to provide a vibration monitoring and diagnostic device and a diagnostic method for a micro permanent magnet synchronous wind turbine generator, so as to solve the problem that the existing vibration monitoring and diagnostic device proposed in the above background technology cannot accurately and comprehensively monitor the vibration data of the micro permanent magnet synchronous wind turbine generator under different orientations and different magnitudes of external force conditions during use.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a vibration monitoring and diagnostic device for a micro permanent magnet synchronous wind turbine, comprising a truncated cone, a micro permanent magnet synchronous wind turbine is arranged just above the center of the truncated cone, a fan blade is fixedly connected to the output shaft of the micro permanent magnet synchronous wind turbine, and an auxiliary structure used in conjunction with the truncated cone is arranged on the surface of the micro permanent magnet synchronous wind turbine;

[0006] The bottom of the truncated table is fixedly connected with legs all around and the inner sides of the legs are fixedly connected with a control host. The surface of the truncated table is provided with a monitoring and diagnosis mechanism used in conjunction with the micro permanent magnet synchronous wind turbine generator and the wind blades.

[0007] Preferably, the auxiliary structure includes a data collector, which is fixed on the top of the micro permanent magnet synchronous wind turbine generator, a vibration velocity sensor is fixedly connected to the outer side of the micro permanent magnet synchronous wind turbine generator output shaft near the fan blades, and an upper vibration sensor is fixedly connected to the center of the top of the micro permanent magnet synchronous wind turbine generator, an annular slide rail is provided on the top of the truncated table, and a rotating shaft is rotatably connected to the center of the top of the truncated table, a slide bracket rotatably matched with the annular slide rail is fixedly connected to the top of the rotating shaft, a mounting seat is fixedly connected to the top of the rotating shaft, and threaded rods are threadedly connected to both sides of the mounting seat, a rotating handle is fixedly connected to the outer side of the threaded rod, and a clamping frame rotatably matched with the micro permanent magnet synchronous wind turbine generator is rotatably connected to the inner side of the threaded rod through a bearing.

[0008] Preferably, the monitoring and diagnostic mechanism includes a lower vibration sensor, which is fixed on the four sides of the top of the truncated table and the four sides of the outer side of the top of the truncated table are fixedly connected to an infrared signal transmitter, the bottom of the truncated table is fixedly connected to a stepper motor through a right-angle frame, the output shaft of the stepper motor is fixedly connected to a reducer and a driving gear in sequence from bottom to top, the surface of the driving gear is meshed with an annular gear rack and one side of the annular gear rack is fixedly connected to a fan frame, the inner side of the fan frame is fixedly connected to an infrared signal receiver used in conjunction with the infrared signal transmitter, and the inner cavity of the fan frame is fixedly connected to a stepless speed-regulating electric fan used in conjunction with fan blades.

[0009] Preferably, the slides are distributed in a triangular equidistant shape along the center of the annular slide rail, and an isolation pad used in conjunction with the micro permanent magnet synchronous wind turbine is fixedly connected to the top of the mounting seat.

[0010] Preferably, the number of the lower vibration sensors is four, the number of the infrared signal transmitters is eight, and the lower vibration sensors and the infrared signal transmitters are distributed in a circular structure along the center of the truncated table.

[0011] Preferably, a side of the fan frame close to the fan blades is fixedly connected to a flow-sharing grid, and a side of the fan frame away from the fan blades is fixedly connected to a dust-proof grid.

[0012] Preferably, a supporting slide rail is provided in an annular shape at the bottom of the inner cavity of the truncated cone, a supporting protrusion is rotatably connected to the inner cavity of the supporting slide rail, and the bottom of the supporting protrusion is fixedly connected to the top of the annular gear rack.

[0013] Preferably, direction signs are fixedly connected on all four sides of the top of the truncated table near the infrared signal transmitter, and the direction signs are divided into eight directions: "North", "South", "West", "East", "Northwest", "Northeast", "Southwest" and "Southeast".

[0014] The diagnostic method of the micro permanent magnet synchronous wind turbine vibration monitoring and diagnostic device, such as the micro permanent magnet synchronous wind turbine vibration monitoring and diagnostic device described above, comprises the following steps:

[0015] Step 1: The inspector first places the micro permanent magnet synchronous wind turbine generator to be diagnosed on the isolation pad surface of the mounting seat, and then holds the rotary handle to drive the threaded rod to rotate clockwise. The threaded rod drives the clamping frame to move inward to clamp and position the clamping surface of the micro permanent magnet synchronous wind turbine generator;

[0016] Step 2: Then the control host controls the micro permanent magnet synchronous wind turbine to start and drive the blades to rotate according to a predetermined program. The upper vibration sensor first monitors the vibration data of the micro permanent magnet synchronous wind turbine when it is turned on, and the vibration speed sensor monitors the rotation speed vibration data of the blades. The four groups of lower vibration sensors monitor the vibration data transmitted to the round table by the micro permanent magnet synchronous wind turbine. Then, the data of the micro permanent magnet synchronous wind turbine without external force is transmitted to the data collector, and the control host performs analysis and processing.

[0017] Step 3: Then the control host controls the stepper motor to start and drive the driving gear to rotate, the driving gear drives the annular gear rack to rotate in a circle, the annular gear rack drives the supporting protrusion to provide stable rotation support compensation in the supporting slide rail, and the annular gear rack drives the stepless speed regulation electric fan to rotate to the predetermined test position through the fan rack. At the same time, the infrared signal receiver on the fan rack receives the infrared signal transmitter signal corresponding to the direction of the upper mark plate on the circular table, then the control host controls the stepper motor to turn off and synchronously controls the reducer to start and slow down the driving gear to stop, then the stepless speed regulation in the fan rack The high-speed electric fan stops stably at the position opposite to the fan blade in the predetermined test position, and then the test personnel control the stepless speed-adjustable electric fan to start in sequence according to the wind force. Under the external action of wind forces of different magnitudes of the stepless speed-adjustable electric fan, the rotation speed and frequency of the fan blades are accelerated. At the same time, the external wind force also forces the micro permanent magnet synchronous wind turbine to drive the shaft to rotate on the round table, and the shaft drives the slide to provide stable rotation compensation in the annular slide rail. By analogy, the micro permanent magnet synchronous wind turbine is subjected to external wind force monitoring operations in eight different directions on eight sets of direction markers.

[0018] Step 4: Finally, the upper vibration sensor monitors the vibration data of the micro permanent magnet synchronous wind turbine under the interference of external forces, the vibration speed sensor monitors the rotational speed vibration data of the blades under the interference of external wind forces, and the four groups of lower vibration sensors monitor the vibration data transmitted to the circular table by the micro permanent magnet synchronous wind turbine under the interference of external forces. The data of the micro permanent magnet synchronous wind turbine under the external force is then transmitted to the data collector, and the control host performs analysis and processing, and compares it with the data of the micro permanent magnet synchronous wind turbine under the condition of no external force. The inspection personnel read the vibration monitoring data analyzed by the control host through an external computer, and can accurately and comprehensively diagnose the working vibration state of the micro permanent magnet synchronous wind turbine under different directions and different external wind force conditions.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. In the present invention, by setting an auxiliary structure, the data collector, the vibration velocity sensor and the upper vibration sensor cooperate to sense and collect the vibration monitoring data of the micro permanent magnet synchronous wind turbine with or without external force, and then the annular slide rail, the rotating shaft, the slide, the mounting seat, the threaded rod and the clamping frame cooperate to provide stable rotation support for the micro permanent magnet synchronous wind turbine, and also clamp and position the micro permanent magnet synchronous wind turbine to prevent the micro permanent magnet synchronous wind turbine from being unstable, loose and falling. By setting a monitoring and diagnostic mechanism, the lower vibration sensor, the infrared signal transmitter, the stepping motor, the reducer, the driving gear, the annular gear rack, the fan rack, the infrared signal receiver and the stepless speed regulating electric fan cooperate to apply external force monitoring conditions of different directions and sizes to the micro permanent magnet synchronous wind turbine, thereby ensuring the accuracy and comprehensiveness of the vibration monitoring data of the micro permanent magnet synchronous wind turbine, and providing an accurate reference for extending the service life of the micro permanent magnet synchronous wind turbine.

[0021] 2. In the present invention, the slide is distributed in a triangular equidistant shape along the center of the annular slide rail. According to the principle of stability of the triangle, the rotating shaft is provided with a stable rotation support, thereby ensuring the stability of the rotating shaft during rotation. The isolation pad is used to provide auxiliary isolation protection between the micro permanent magnet synchronous wind turbine and the mounting base to prevent the mounting base from causing damage to the surface of the micro permanent magnet synchronous wind turbine. The number of lower vibration sensors is four and the number of infrared signal transmitters is eight, which are all distributed in a circular structure along the center of the truncated table. The vibration data transmitted from the micro permanent magnet synchronous wind turbine to the truncated table is monitored and sensed, and it is also convenient for the infrared signal receiver to receive the infrared signal emitted by the infrared signal transmitter accordingly.

[0022] 3. In the present invention, a flow-equalizing grid is used to improve the uniformity of the airflow at the air outlet of the fan frame to prevent the wind force and airflow discharged from the fan frame from being turbulent; a dust-proof grid is used to perform dust-proof treatment on the air inlet of the fan frame to prevent dust from entering the fan frame and affecting the stepless speed-regulating electric fan; a supporting slide rail and a supporting protrusion are used to provide rotational support compensation for the annular gear frame to improve the stability of the rotation of the annular gear frame; and a direction marking plate is used to provide an accurate reference for inspectors to identify the direction, so that inspectors can quickly observe and confirm the current position of the fan blades and the stepless speed-regulating electric fan.

[0023] The present invention provides an auxiliary structure to firstly provide a stable rotation support for the micro permanent magnet synchronous wind turbine, and also clamps and positions the micro permanent magnet synchronous wind turbine, and performs sensing and collection of vibration monitoring data of the micro permanent magnet synchronous wind turbine in the presence or absence of external forces. By providing a monitoring and diagnostic mechanism, monitoring conditions of external forces of different orientations and sizes are applied to the micro permanent magnet synchronous wind turbine, thereby ensuring the accuracy and comprehensiveness of the vibration monitoring data of the micro permanent magnet synchronous wind turbine. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the present invention;

[0025] Figure 2 A bottom view of the structure of the present invention;

[0026] Figure 3 It is a partial top view of the structure of the present invention;

[0027] Figure 4 A bottom view of the structure of the truncated table of the present invention;

[0028] Figure 5 A partial bottom view of the structure of the monitoring and diagnosis mechanism of the present invention;

[0029] Figure 6 It is a partial top view of the structure of the monitoring and diagnostic mechanism of the present invention.

[0030] In the figure: 1. round table; 2. micro permanent magnet synchronous wind turbine; 3. fan blade; 4. auxiliary structure; 41. data acquisition device; 42. vibration speed sensor; 43. upper vibration sensor; 44. annular slide rail; 45. rotating shaft; 46. slide rack; 47. mounting seat; 48. threaded rod; 49. clamping frame; 5. control host; 6. monitoring and diagnosis mechanism; 61. lower vibration sensor; 62. infrared signal transmitter; 63. stepping motor; 64. reducer; 65. driving gear; 66. annular gear rack; 67. fan rack; 68. infrared signal receiver; 69. stepless speed regulating electric fan; 7. supporting slide rail; 8. supporting protrusion; 9. direction marking plate. DETAILED DESCRIPTION

[0031] 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.

[0032] Example 1

[0033] See also Figure 1-Figure 6 The present invention provides a technical solution: a vibration monitoring and diagnostic device for a micro permanent magnet synchronous wind turbine generator, comprising a truncated table 1, a micro permanent magnet synchronous wind turbine generator 2 is arranged just above the center of the truncated table 1, a fan blade 3 is fixedly connected to the output shaft of the micro permanent magnet synchronous wind turbine generator 2, and an auxiliary structure 4 used in conjunction with the truncated table 1 is arranged on the surface of the micro permanent magnet synchronous wind turbine generator 2. By setting the auxiliary structure 4, the vibration monitoring data of the micro permanent magnet synchronous wind turbine generator 2 with or without an external force is sensed and collected by the cooperation of a data collector 41, a vibration velocity sensor 42 and an upper vibration sensor 43, and then the cooperation of an annular slide rail 44, a rotating shaft 45, a slide 46, a mounting seat 47, a threaded rod 48 and a clamping frame 49 plays a role in stable rotation support for the micro permanent magnet synchronous wind turbine generator 2, and also clamps and positions the micro permanent magnet synchronous wind turbine generator 2 to prevent the micro permanent magnet synchronous wind turbine generator 2 from becoming unstable and loose and falling;

[0034] The bottom of the truncated table 1 is fixedly connected with legs all around and the inner side of the legs is fixedly connected with a control host 5. The surface of the truncated table 1 is provided with a monitoring and diagnostic mechanism 6 used in conjunction with the micro permanent magnet synchronous wind turbine 2 and the fan blades 3. By setting up the monitoring and diagnostic mechanism 6, the cooperation of the lower vibration sensor 61, the infrared signal transmitter 62, the stepping motor 63, the reducer 64, the driving gear 65, the annular gear rack 66, the fan rack 67, the infrared signal receiver 68 and the stepless speed regulating electric fan 69 can apply external force monitoring conditions of different directions and sizes to the micro permanent magnet synchronous wind turbine 2, thereby ensuring the accuracy and comprehensiveness of the vibration monitoring data of the micro permanent magnet synchronous wind turbine 2 and providing an accurate reference for extending the service life of the micro permanent magnet synchronous wind turbine 2.

[0035] Example 2

[0036] See also Figure 1-Figure 6The present invention provides a technical solution: a vibration monitoring and diagnostic device for a micro permanent magnet synchronous wind turbine, comprising a truncated table 1, wherein direction marking signs 9 are fixedly connected to the four sides of the top of the truncated table 1 near the infrared signal transmitter 62, and the direction marking signs 9 are divided into eight directions: "north", "south", "west", "east", "northwest", "northeast", "southwest" and "southeast", providing an accurate reference for detection personnel to identify the direction, so that the detection personnel can quickly observe and confirm the current position of the fan blade 3 and the stepless speed regulating electric fan 69, and a micro permanent magnet synchronous wind turbine 2 is arranged directly above the center of the truncated table 1, and the output shaft of the micro permanent magnet synchronous wind turbine 2 is fixedly connected to the fan blade 3. The surface of the micro permanent magnet synchronous wind turbine 2 is provided with an auxiliary structure 4 used in conjunction with the truncated table 1. The auxiliary structure 4 includes a data collector 41. The data collector 41 is fixed to the top of the micro permanent magnet synchronous wind turbine 2. A vibration velocity sensor 42 is fixedly connected to the outer side of the output shaft of the micro permanent magnet synchronous wind turbine 2 near the fan blade 3, and an upper vibration sensor 43 is fixedly connected to the center of the top of the micro permanent magnet synchronous wind turbine 2. An annular slide rail 44 is provided on the top of the truncated table 1, and a rotating shaft 45 is rotatably connected to the center of the top of the truncated table 1. A slide 46 that rotatably cooperates with the annular slide rail 44 is fixedly connected to the top of the rotating shaft 45. The slide 46 moves along the annular slide rail. The center of 44 is distributed in a triangular equidistant shape. According to the principle that the triangle has stability, it plays a role in stabilizing the rotation support of the shaft 45 to ensure the stability of the shaft 45 during rotation. The top of the shaft 45 is fixedly connected with a mounting seat 47 and both sides of the mounting seat 47 are threadedly connected with threaded rods 48. The top of the mounting seat 47 is fixedly connected with an isolation pad used in conjunction with the micro permanent magnet synchronous wind turbine 2 to provide auxiliary isolation protection between the micro permanent magnet synchronous wind turbine 2 and the mounting seat 47 to prevent the mounting seat 47 from causing bumps and damage to the surface of the micro permanent magnet synchronous wind turbine 2. The outer side of the threaded rod 48 is fixedly connected with a rotating handle and the inner side of the threaded rod 48 is threaded through the shaft. The bearing is rotatably connected with a clamping frame 49 which is clamped and matched with the micro permanent magnet synchronous wind turbine 2. By setting the auxiliary structure 4, the data collector 41, the vibration velocity sensor 42 and the upper vibration sensor 43 cooperate to sense and collect the vibration monitoring data of the micro permanent magnet synchronous wind turbine 2 with or without external force. Then, the annular slide rail 44, the rotating shaft 45, the slide 46, the mounting seat 47, the threaded rod 48 and the clamping frame 49 cooperate to provide stable rotation support for the micro permanent magnet synchronous wind turbine 2. At the same time, the micro permanent magnet synchronous wind turbine 2 is clamped and positioned to prevent the micro permanent magnet synchronous wind turbine 2 from becoming unstable and loose and falling.The bottom of the truncated platform 1 is fixedly connected with legs all around, and the inner side of the legs is fixedly connected with a control host 5. The surface of the truncated platform 1 is provided with a monitoring and diagnostic mechanism 6 used in conjunction with the micro permanent magnet synchronous wind turbine 2 and the wind blades 3. The monitoring and diagnostic mechanism 6 includes a lower vibration sensor 61, which is fixed around the top of the truncated platform 1 and the outer side of the top of the truncated platform 1 is fixedly connected with an infrared signal transmitter 62 all around. The number of the lower vibration sensors 61 is four, and the number of the infrared signal transmitters 62 is eight. The lower vibration sensors 61 and the infrared signal transmitters 62 are distributed in a circular structure along the center of the truncated platform 1, which can monitor the micro permanent magnet synchronous wind turbine 2 and the wind blades 3. The synchronous wind turbine 2 transmits vibration data to the truncated table 1 for monitoring and sensing, and it is also convenient for the infrared signal receiver 68 to receive the infrared signal emitted by the infrared signal transmitter 62. The bottom of the truncated table 1 is fixedly connected to a stepper motor 63 through a right-angle frame. The output shaft of the stepper motor 63 is fixedly connected to a reducer 64 and a driving gear 65 from bottom to top in sequence. The surface of the driving gear 65 is meshed with an annular gear rack 66 and one side of the annular gear rack 66 is fixedly connected to a fan rack 67. A supporting slide rail 7 is provided in an annular shape at the bottom of the inner cavity of the truncated table 1. The inner cavity of the supporting slide rail 7 is rotatably connected to a supporting protrusion 8. The bottom of the supporting protrusion 8 is connected to the annular gear rack 66. The top of the frame 66 is fixedly connected to provide rotation support compensation for the annular gear frame 66 to improve the stability of the rotation of the annular gear frame 66. The side of the fan frame 67 close to the fan blade 3 is fixedly connected with a flow-equalizing grid frame to improve the uniformity of the airflow at the air outlet of the fan frame 67 and prevent the wind force and airflow discharged by the fan frame 67 from being turbulent. The side of the fan frame 67 away from the fan blade 3 is fixedly connected with a dustproof grid frame to perform dustproof treatment on the air inlet position of the fan frame 67 to prevent dust from entering the fan frame 67 and affecting the stepless speed regulating electric fan 69. The inner side of the fan frame 67 is fixedly connected with an infrared signal receiver 68 used in conjunction with the infrared signal transmitter 62. The inner cavity of the fan frame 67 is fixedly connected with a stepless speed-regulating electric fan 69 used in conjunction with the fan blades 3. By setting up a monitoring and diagnostic mechanism 6, the cooperation of the lower vibration sensor 61, the infrared signal transmitter 62, the stepping motor 63, the reducer 64, the driving gear 65, the annular gear frame 66, the fan frame 67, the infrared signal receiver 68 and the stepless speed-regulating electric fan 69 can apply different directions and different sizes of external force monitoring conditions to the micro permanent magnet synchronous wind turbine 2, thereby ensuring the accuracy and comprehensiveness of the vibration monitoring data of the micro permanent magnet synchronous wind turbine 2, and providing an accurate reference for extending the service life of the micro permanent magnet synchronous wind turbine 2;

[0037] The diagnostic method of the micro permanent magnet synchronous wind turbine vibration monitoring and diagnostic device, such as the above-mentioned micro permanent magnet synchronous wind turbine vibration monitoring and diagnostic device, comprises the following steps:

[0038] Step 1: The inspector first places the micro permanent magnet synchronous wind turbine generator 2 to be diagnosed on the isolation pad surface of the mounting seat 47, and then respectively holds the rotary handle to drive the threaded rod 48 to rotate clockwise, and the threaded rod 48 drives the clamping frame 49 to move inward to clamp and position the clamping surface of the micro permanent magnet synchronous wind turbine generator 2;

[0039] Step 2: Then the control host 5 controls the micro permanent magnet synchronous wind turbine 2 to start and drive the fan blades 3 to rotate according to a predetermined program, the upper vibration sensor 43 first monitors the vibration data of the micro permanent magnet synchronous wind turbine 2 in the start-up state, the vibration speed sensor 42 monitors the rotation speed vibration data of the fan blades 3, and the four groups of lower vibration sensors 61 monitor the vibration data transmitted to the truncated table 1 by the micro permanent magnet synchronous wind turbine 2, and then the data of the micro permanent magnet synchronous wind turbine 2 in the absence of external force is transmitted to the data collector 41, and the control host 5 performs analysis and processing;

[0040] Step 3: Then the control host 5 controls the stepper motor 63 to turn on and drive the driving gear 65 to rotate, the driving gear 65 drives the annular gear rack 66 to rotate in a circle, the annular gear rack 66 drives the supporting protrusion 8 to provide stable rotation support compensation in the supporting slide rail 7, the annular gear rack 66 drives the stepless speed regulating electric fan 69 to rotate to the predetermined test position through the fan rack 67, and at the same time, the infrared signal receiver 68 on the fan rack 67 receives the infrared signal transmitter 62 signal corresponding to the direction mark plate 9 on the round table 1, then the control host 5 controls the stepper motor 63 to turn off and synchronously controls the reducer 64 to turn on and decelerate and stop the driving gear 65, then the fan The stepless speed-adjustable electric fan 69 in the frame 67 stops stably at the position opposite to the fan blade 3 in the predetermined test orientation, and then the inspector controls the stepless speed-adjustable electric fan 69 to start in sequence according to the wind force level. Under the external action of wind forces of different magnitudes of the stepless speed-adjustable electric fan 69, the rotation speed and frequency of the fan blade 3 are accelerated. At the same time, the external wind force also forces the micro permanent magnet synchronous wind turbine generator 2 to drive the rotating shaft 45 to rotate on the round table 1, and the rotating shaft 45 drives the slide 46 to provide stable rotation compensation in the annular slide rail 44. By analogy, the micro permanent magnet synchronous wind turbine generator 2 is subjected to external wind force monitoring operations in eight different directions on the eight sets of direction marking signs 9;

[0041] Step 4: Finally, the upper vibration sensor 43 monitors the vibration data of the micro permanent magnet synchronous wind turbine 2 under the interference of external forces, the vibration speed sensor 42 monitors the rotational speed vibration data of the fan blade 3 under the interference of external wind force, and the four groups of lower vibration sensors 61 monitor the vibration data transmitted to the truncated table 1 by the micro permanent magnet synchronous wind turbine 2 under the interference of external forces. The data of the micro permanent magnet synchronous wind turbine 2 under the external force is then transmitted to the data acquisition device 41, and is analyzed and processed by the control host 5, and compared with the data of the micro permanent magnet synchronous wind turbine 2 under the condition of no external force. The detection personnel read the vibration monitoring data analyzed by the control host 5 through an external computer, and can accurately and comprehensively diagnose the working vibration state of the micro permanent magnet synchronous wind turbine 2 under different directions and different external wind force conditions.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A vibration monitoring and diagnostic device for a micro permanent magnet synchronous wind turbine generator, comprising a round table, characterized in that: A micro permanent magnet synchronous wind generator is arranged just above the center of the truncated table, the output shaft of the micro permanent magnet synchronous wind generator is fixedly connected with a fan blade, and the surface of the micro permanent magnet synchronous wind generator is provided with an auxiliary structure used in conjunction with the truncated table; The bottom of the truncated platform is fixedly connected with legs all around and the inner side of the legs is fixedly connected with a control host. The surface of the truncated platform is provided with a monitoring and diagnosis mechanism used in conjunction with the micro permanent magnet synchronous wind turbine generator and the wind blades. The auxiliary structure includes a data collector, which is fixed on the top of the micro permanent magnet synchronous wind turbine generator. A vibration speed sensor is fixedly connected to the outer side of the micro permanent magnet synchronous wind turbine generator output shaft near the fan blade, and an upper vibration sensor is fixedly connected to the center of the top of the micro permanent magnet synchronous wind turbine generator. An annular slide rail is provided on the top of the truncated table, and a rotating shaft is rotatably connected to the center of the top of the truncated table. A slide bracket rotatably matched with the annular slide rail is fixedly connected to the top of the rotating shaft. A mounting seat is fixedly connected to the top of the rotating shaft, and threaded rods are threadedly connected to both sides of the mounting seat. A rotating handle is fixedly connected to the outer side of the threaded rod, and a clamping frame rotatably matched with the micro permanent magnet synchronous wind turbine generator is rotatably connected to the inner side of the threaded rod through a bearing. The monitoring and diagnostic mechanism includes a lower vibration sensor, which is fixed around the top of the truncated table and is fixedly connected to infrared signal transmitters around the outer side of the top of the truncated table. The bottom of the truncated table is fixedly connected to a stepper motor through a right-angle frame. The output shaft of the stepper motor is fixedly connected to a reducer and a driving gear in sequence from bottom to top. The surface of the driving gear is meshed with an annular gear rack and one side of the annular gear rack is fixedly connected to a fan rack. The inner side of the fan rack is fixedly connected to an infrared signal receiver used in conjunction with the infrared signal transmitter, and the inner cavity of the fan rack is fixedly connected to a stepless speed-regulating electric fan used in conjunction with a fan blade. Direction signs are fixedly connected on all sides of the top of the truncated platform near the infrared signal transmitter. The direction signs are divided into eight directions: "north", "south", "west", "east", "northwest", "northeast", "southwest" and "southeast".

2. The vibration monitoring and diagnostic device for a micro permanent magnet synchronous wind turbine generator according to claim 1 is characterized in that: The slides are distributed in a triangular equidistant shape along the center of the annular slide rail, and an isolation pad used in conjunction with a micro permanent magnet synchronous wind turbine generator is fixedly connected to the top of the mounting seat.

3. The vibration monitoring and diagnostic device for a micro permanent magnet synchronous wind turbine generator according to claim 2 is characterized in that: The number of the lower vibration sensors is four, the number of the infrared signal transmitters is eight, and the lower vibration sensors and the infrared signal transmitters are distributed in a circular structure along the center of the truncated table.

4. The vibration monitoring and diagnostic device for a micro permanent magnet synchronous wind turbine generator according to claim 3 is characterized in that: A side of the fan frame close to the fan blades is fixedly connected with a current balancing grid frame, and a side of the fan frame away from the fan blades is fixedly connected with a dustproof grid frame.

5. The vibration monitoring and diagnostic device for a micro permanent magnet synchronous wind turbine generator according to claim 4 is characterized in that: A supporting slide rail is provided in an annular shape at the bottom of the inner cavity of the truncated cone. A supporting convex block is rotatably connected to the inner cavity of the supporting slide rail. The bottom of the supporting convex block is fixedly connected to the top of the annular gear rack.

6. A diagnostic method using the vibration monitoring and diagnostic device for a micro permanent magnet synchronous wind turbine generator as claimed in claim 5, characterized in that: The steps include: Step 1: The inspector first places the micro permanent magnet synchronous wind turbine generator to be diagnosed on the isolation pad surface of the mounting seat, and then holds the rotary handle to drive the threaded rod to rotate clockwise. The threaded rod drives the clamping frame to move inward to clamp and position the clamping surface of the micro permanent magnet synchronous wind turbine generator; Step 2: Then the control host controls the micro permanent magnet synchronous wind turbine to start and drive the blades to rotate according to a predetermined program. The upper vibration sensor first monitors the vibration data of the micro permanent magnet synchronous wind turbine when it is turned on, and the vibration speed sensor monitors the rotation speed vibration data of the blades. The four groups of lower vibration sensors monitor the vibration data transmitted to the round table by the micro permanent magnet synchronous wind turbine. Then, the data of the micro permanent magnet synchronous wind turbine without external force is transmitted to the data collector, and the control host performs analysis and processing. Step 3: Then the control host controls the stepper motor to start and drive the driving gear to rotate, the driving gear drives the annular gear rack to rotate in a circle, the annular gear rack drives the supporting protrusion to provide stable rotation support compensation in the supporting slide rail, and the annular gear rack drives the stepless speed regulation electric fan to rotate to the predetermined test position through the fan rack. At the same time, the infrared signal receiver on the fan rack receives the infrared signal transmitter signal corresponding to the direction of the upper mark plate on the circular table, then the control host controls the stepper motor to turn off and synchronously controls the reducer to start and slow down the driving gear to stop, then the stepless speed regulation in the fan rack The high-speed electric fan stops stably at the position opposite to the fan blade in the predetermined test position, and then the test personnel control the stepless speed-adjustable electric fan to start in sequence according to the wind force. Under the external action of wind forces of different magnitudes of the stepless speed-adjustable electric fan, the rotation speed and frequency of the fan blades are accelerated. At the same time, the external wind force also forces the micro permanent magnet synchronous wind turbine to drive the shaft to rotate on the round table, and the shaft drives the slide to provide stable rotation compensation in the annular slide rail. By analogy, the micro permanent magnet synchronous wind turbine is subjected to external wind force monitoring operations in eight different directions on eight sets of direction markers. Step 4: Finally, the upper vibration sensor monitors the vibration data of the micro permanent magnet synchronous wind turbine under the interference of external forces, the vibration speed sensor monitors the rotational speed vibration data of the blades under the interference of external wind forces, and the four groups of lower vibration sensors monitor the vibration data transmitted to the circular table by the micro permanent magnet synchronous wind turbine under the interference of external forces. The data of the micro permanent magnet synchronous wind turbine under the external force is then transmitted to the data collector, and the control host performs analysis and processing, and compares it with the data of the micro permanent magnet synchronous wind turbine under the condition of no external force. The inspection personnel read the vibration monitoring data analyzed by the control host through an external computer, and can accurately and comprehensively diagnose the working vibration state of the micro permanent magnet synchronous wind turbine under different directions and different external wind force conditions.

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