System for detecting clockwise and counterclockwise starting of fan

Abstract

The system comprises a test frame, a transmission shaft, a dynamic clamping structure, a variable frequency motor and an upper computer, the test frame is provided with an installation position used for installing a to-be-tested fan, one end of the transmission shaft is provided with a clamping transmission assembly, and after the dynamic clamping structure clamps the transmission shaft, the transmission shaft is clamped by the variable frequency motor. The variable frequency motor drives the dynamic clamping structure to rotate, the impeller of the to-be-tested fan is driven to rotate under the cooperative transmission of the transmission shaft and the clamping transmission assembly so as to simulate the rotation of the impeller of the to-be-tested fan in the forward and reverse wind state under the actual working condition, and the dynamic clamping structure is controlled to loosen the clamping of the transmission shaft after the rotating speed of the to-be-tested fan is stable. And immediately controlling the to-be-tested fan to start through the upper computer, and judging whether the to-be-tested fan is successfully started or not according to whether the rotating speed value of the to-be-tested fan collected by the upper computer reaches a set value or not. The variable frequency motor is controlled to start through the frequency converter, the effect of conveniently adjusting the rotating speed and the rotating direction of the to-be-tested fan is achieved, and meanwhile the provided rotating speed is higher compared with a counter-supporting fan.

Description

Technical Field

[0001] This application relates to the field of wind turbine testing technology, and in particular to a wind turbine start-up detection system for both wind and reverse wind. Background Technology

[0002] In actual operation, existing fan products may rotate in either the forward or reverse direction (reverse rotation) due to the pressure of the ventilation duct or the influence of external airflow, especially when in standby or power-off states. Restarting a fan in forward rotation indicates a start-up in the direction of the wind, while restarting in reverse rotation indicates a start-up against the wind. EC fans (brushless permanent magnet motors) have limitations due to current technology, resulting in an upper limit to their starting capacity and occasional start-up failures in both forward and reverse wind conditions. Therefore, testing the start-up failure rate of this type of fan can serve as one of the indicators for product reliability assessment. However, achieving the forward and reverse rotation states of the fan under test in actual operation is impractical in on-site testing; therefore, testing can only be conducted before formal installation and use. Traditional testing methods mainly rely on manual testing, but this process suffers from drawbacks such as being time-consuming and labor-intensive, unable to achieve uninterrupted testing, slow data acquisition, insufficient data volume, and inability to accurately assess the start-up failure rate of the fan under test in both forward and reverse wind conditions.

[0003] Due to the inconvenience of traditional manual testing methods, the industry has gradually begun to adopt a new testing method. This method connects the outlet of the fan under test (DUT) and the outlet of the supporting fan to a sealed test chamber. External air is then drawn in through the inlet of the supporting fan and discharged into the test chamber through its outlet. When the supporting fan delivers airflow into the sealed test chamber, the pressure inside the chamber increases, causing the airflow to enter through the outlet of the DUT and exit through its inlet. This puts the DUT in a reverse-wind state. The DUT reverses direction in this reverse-wind state, simulating the reverse rotation of the DUT under actual working conditions. The host computer then controls the DUT to start, and the success of the reverse-wind start is determined by whether the DUT's rotation speed reaches the set value.

[0004] While the above method improves the convenience of the testing process and speeds up the acquisition of test data compared to manual testing, it still has shortcomings in actual testing. Specifically, when it is necessary to adjust the speed of the test fan in the face of wind, it is necessary to adjust the air volume output of the counter-wind fan. However, the counter-wind fan provides a limited reverse wind speed to the test fan through airflow. If a higher speed is required, a more powerful counter-wind fan needs to be replaced, which places excessive demands on the fan. In addition, the above device can only detect the start-up of the fan in either the headwind or the face-wind state without disassembling or changing the direction of the fan, making it inconvenient to use overall. SUMMARY

[0005] In order to realize efficient and convenient adjustment of the rotational speed and direction of the test fan, thereby improving the convenience of the fan start-up detection process, the application provides a fan start-up detection system.

[0006] The application provides a fan start-up detection system, which adopts the following technical scheme: A fan start-up detection system, comprising a test frame, a transmission shaft and a dynamic clamping structure rotating on the test frame, a variable frequency motor for controlling the rotation of the dynamic clamping structure, and an upper computer arranged on the test frame, wherein the test frame is provided with a mounting position for mounting a fan to be tested, the dynamic clamping structure is used for dynamically clamping the transmission shaft, the transmission shaft is provided with a clamping transmission assembly at one end away from the dynamic clamping structure, the transmission shaft and the clamping transmission assembly cooperate to realize the transmission between the dynamic clamping structure and the impeller of the fan to be tested, the upper computer is used for controlling the operation and shutdown of the fan to be tested and collecting the rotational speed data of the impeller of the fan to be tested, after the dynamic clamping structure clamps the transmission shaft, the variable frequency motor drives the rotation of the dynamic clamping structure, and under the cooperation of the transmission shaft and the clamping transmission assembly, the impeller of the fan to be tested is driven to rotate, so as to simulate the rotation of the impeller of the fan to be tested under the conditions of forward and reverse wind in actual working conditions, after the rotational speed of the fan to be tested is stabilized, the dynamic clamping structure is controlled to release the clamping of the transmission shaft, and immediately the fan to be tested is started by the upper computer, and whether the fan to be tested is successfully started is judged according to whether the rotational speed value of the fan to be tested collected by the upper computer reaches the set value.

[0007] By adopting the above technical scheme, when in use, the rotational speed and direction of the output shaft of the variable frequency motor are adjusted by the frequency converter, and then the transmission shaft is clamped by the dynamic clamping structure, so as to realize the purpose of driving the rotation of the impeller of the fan to be tested under the cooperation of the transmission shaft and the clamping transmission assembly, thereby realizing the rotation of the impeller of the fan to be tested under the conditions of forward and reverse wind in actual working conditions, when the rotational speed of the impeller of the fan to be tested is stabilized, the dynamic clamping structure is controlled to release the clamping of the transmission shaft, the fan to be tested continues to rotate under the action of inertia, at this time, the fan to be tested is immediately started, so as to realize the purpose of start-up detection of the fan to be tested under the conditions of forward and reverse wind, compared with the way of manufacturing air flow to control the rotation of the impeller of the fan to be tested in the prior art, the application is more convenient to use, and the adjustment of the rotational speed and direction of the impeller of the fan to be tested can be realized without disassembly.

[0008] Preferably, a lifting platform is arranged on the test frame and slides along the height direction of the test frame, a lifting adjusting mechanism is arranged on the test frame and is used to drive the lifting platform to slide, a mounting seat is arranged on the lifting platform and slides on the lifting platform, a horizontal adjusting mechanism is arranged on the lifting platform and is used to adjust the position of the mounting seat, and the variable frequency motor, the dynamic clamping structure and the transmission shaft are arranged on the mounting seat.

[0009] By adopting the technical scheme, when in use, the cooperation of the lifting adjusting mechanism and the horizontal adjusting mechanism realizes the adaptability of the starting detection of different types of to-be-tested fans, and can also reduce the influence of the installation or machining error on the coaxial connection of the transmission shaft and the to-be-tested fan.

[0010] Preferably, the lifting adjusting mechanism comprises a plurality of screw jacks arranged on the test stand, a gear reverser arranged on the test stand, a linkage rod for connecting the screw jacks and the gear reverser, and a driving motor arranged on the test stand, the gear reverser cooperates with the linkage rod to realize synchronous transmission of the plurality of screw jacks, the driving motor is used to control the rotation of the linkage rod, and the screw rod of the screw jack is fixedly connected with the lifting platform.

[0011] By adopting the technical scheme, when in use, the cooperation of the plurality of screw jacks and the gear reverser realizes the purpose of synchronous driving of the plurality of screw jacks by one driving motor, thereby ensuring the stability of the height adjustment of the lifting platform and making the use more convenient.

[0012] Preferably, the horizontal adjusting mechanism comprises a first sliding plate slidingly arranged on the lifting platform, a first positioning structure arranged on the lifting platform and used for positioning the first sliding plate after sliding, a second sliding plate slidingly arranged on the first sliding plate, and a second positioning structure used for positioning the second sliding plate after sliding, the mounting seat is fixed on the second sliding plate, and the sliding directions of the first sliding plate, the second sliding plate and the lifting platform are perpendicular to each other.

[0013] By adopting the technical scheme, when in use, the setting of the first sliding plate realizes the adjustment of the position of the transmission shaft in the horizontal direction, and the setting of the second sliding plate realizes the adjustment of the position of the transmission shaft in the axial direction of the to-be-tested fan, which is also conducive to the connection of the transmission shaft and the to-be-tested fan and makes the use more simple.

[0014] Preferably, the clamping transmission assembly comprises a flange plate used for connecting the outer rotor motor shell of the to-be-tested fan, a plug rod fixed on the flange plate, and a shaft coupling arranged between the plug rod and the transmission shaft, and the two ends of the shaft coupling are fixed in the circumferential direction of the transmission shaft and the plug rod by means of key connection.

[0015] By adopting the technical scheme, when in use, the flange plate can be installed on the to-be-tested fan, the to-be-tested fan can be installed on the mounting position, and finally the shaft coupling can be inserted on the plug rod. Compared with the installation of the to-be-tested fan first and the influence of the test stand on the installation of the flange plate by workers, the use is more convenient.

[0016] Preferably, a protection assembly is detachably arranged on the test stand, and the protection assembly is used for protecting the circumferential side of the to-be-tested fan to ensure the normal starting of the to-be-tested fan.

[0017] By adopting the technical scheme, when in use, the setting of the protection assembly prevents foreign matters from the outside from affecting the start of the to-be-tested fan during the start detection process of the to-be-tested fan, that is, ensures the normal start detection process of the to-be-tested fan, and also prevents the internal parts or debris of the to-be-tested fan from splashing during the start process of the to-be-tested fan.

[0018] Preferably, the protection assembly comprises a protection frame and a protection net arranged on the protection frame, the protection net and the mounting position form an air-permeable protection area, the to-be-tested fan can be installed in the air-permeable protection area, the bottom end of the protection frame is provided with a roller, and the test frame is provided with a locking mechanism for preventing the protection frame from being separated from the test frame.

[0019] By adopting the technical scheme, when in use, the setting of the protection net realizes the protection of the to-be-tested fan, the setting of the roller facilitates the workers to move the protection frame and the protection net away when disassembling or installing the to-be-tested fan, and the setting of the locking mechanism ensures that the protection net will not be separated from the test frame during the start detection process of the to-be-tested fan, and the whole use is more convenient.

[0020] Preferably, the locking mechanism comprises a rotating plate rotatably arranged on the test frame and a locking bolt arranged on the rotating plate, the protection frame is provided with a positioning hole, and the locking bolt is threadedly matched with the positioning hole.

[0021] By adopting the technical scheme, when in use, after the protection frame is moved to cover the to-be-tested fan, the rotating plate can be rotated to align the locking bolt with the positioning hole, and then the locking bolt is screwed to be inserted into the positioning hole, so that the locking of the protection frame can be realized, and the use is simple and convenient.

[0022] In summary, the present application has at least one of the following beneficial technical effects: 1. The frequency converter adjusts the rotating speed and rotating direction of the output shaft of the variable frequency motor, and the dynamic clamping structure clamps the transmission shaft, so that the transmission shaft and the clamping transmission assembly drive the to-be-tested fan impeller to rotate, thereby realizing the rotation of the to-be-tested fan impeller in the actual working condition of the forward and reverse wind state. When the rotating speed of the to-be-tested fan impeller is stable, the dynamic clamping structure is controlled to release the clamping of the transmission shaft, and the to-be-tested fan continues to rotate under the action of inertia. At this time, the to-be-tested fan is immediately started, so as to realize the start detection of the to-be-tested fan in the forward and reverse wind state. Compared with the existing technology of controlling the to-be-tested fan impeller to rotate by manufacturing air flow, the use is more convenient, and the rotating direction and rotating speed of the to-be-tested fan impeller can be adjusted without disassembly. 2. By the cooperation of the lifting adjusting mechanism and the horizontal adjusting mechanism, the adaptability of the starting detection of different types of to-be-tested fans is realized, and the influence of the transmission shaft and the to-be-tested fan unable to be coaxially connected due to installation or machining errors is reduced, and the use is more convenient; 3. By the cooperation of the protective net, the protective frame, the roller and the locking mechanism, the protection of the side of the to-be-tested fan is realized without affecting the convenience of the installation of the to-be-tested fan, and the normal detection process of the to-be-tested fan is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is the axonometric view mainly embodying the installation state of the protective net in the embodiment one of the application; Figure 2 is the axonometric view mainly embodying the overall installation state structure of the device in the embodiment one of the application; Figure 3 is the axonometric view mainly embodying the installation structure of the lifting adjusting mechanism in the embodiment one of the application; Figure 4 is the exploded view mainly embodying the installation structure of the horizontal adjusting mechanism in the embodiment one of the application; Figure 5 is the axonometric view mainly embodying the connection structure of the transmission shaft in the embodiment one of the application; Figure 6 is the exploded view mainly embodying the installation structure of the clamping transmission assembly in the embodiment one of the application; Figure 7 is the exploded view mainly embodying the protective assembly structure in the embodiment one of the application; Figure 8 is Figure 7 is the local enlarged view mainly embodying the A part structure in the embodiment one of the application; Figure 9 is the axonometric view mainly embodying the installation position of the laser sensor in the embodiment two of the application.

[0024] Label: 1, test frame; 11, mounting position; 12, locking mechanism; 121, rotating plate; 122, locking bolt; 13, castor; 14, opening and closing door; 15, observation window; 2, transmission shaft; 3, dynamic clamping structure; 4, variable frequency motor; 5, upper computer; 6, clamping transmission assembly; 61, flange plate; 62, insertion rod; 63, shaft coupling; 7, lifting platform; 8, lifting adjusting mechanism; 81, screw elevator; 82, gear reverser; 83, linkage rod; 84, driving motor; 9, mounting seat; 10, horizontal adjusting mechanism; 101, first sliding plate; 102, first positioning structure; 1021, first folding plate; 1022, first bolt; 1023, first nut; 1024, first waist-shaped hole; 103, second sliding plate; 104, second positioning structure; 1041, second folding plate; 1042, second bolt; 1043, second nut; 1044, second waist-shaped hole; 105, first guide rail; 106, first sliding block; 107, second guide rail; 108, second sliding block; 20, protection assembly; 201, protection frame; 202, protection net; 203, roller; 30, positioning detection bump; 40, laser sensor. DETAILED DESCRIPTION

[0025] The following will be described in detail below in combination with the accompanying Figure 1 - the accompanying Figure 9 The present application is further described in detail.

[0026] The embodiment of the present application discloses a fan forward and reverse wind starting detection system.

[0027] Embodiment 1: Referring to Figure 1 and Figure 2 A fan forward and reverse wind starting detection system, comprising a test frame 1, a transmission shaft 2, a dynamic clamping structure 3, a variable frequency motor 4 and an upper computer 5, wherein the test frame 1 adopts a rectangular frame structure in the present application, and a castor 13 with a brake function is installed at the bottom of the test frame 1, and an opening and closing door 14 is hingedly arranged on the test frame 1, the opening and closing door 14 cooperates with the side wall on the test frame 1 to form a mounting cavity, the transmission shaft 2, the dynamic clamping structure 3 and the variable frequency motor 4 are all arranged in the mounting cavity, and the upper computer 5 is arranged outside the test frame 1, so as to facilitate the operation of workers; the transparent observation window 15 is arranged on the opening and closing door 14, so as to facilitate the workers to observe the running state of each module in the test frame 1; when in use, the simple protection of the inner transmission shaft 2, the dynamic clamping structure 3 and the variable frequency motor 4 is realized through the arrangement of the opening and closing door 14, and meanwhile the normal installation and use of the transmission shaft 2 are not affected.

[0028] Referring to Figure 2 and Figure 3The lifting platform 7 and the lifting adjusting mechanism 8 are arranged in the test rack 1, the lifting adjusting mechanism 8 is used for driving the lifting platform 7 to slide along the height direction of the test rack 1, and the lifting adjusting mechanism 8 comprises a screw lifter 81, a gear reverser 82, a linkage rod 83 and a driving motor 84, wherein the screw lifter 81, the gear reverser 82 and the linkage rod 83 are arranged in plurality, the plurality of gear reversers 82 and the plurality of linkage rods 83 are matched with each other to realize synchronous transmission between the plurality of screw lifters 81, and specifically, in the embodiment, the screw lifter 81 is arranged as four, and the four screw lifters 81 are symmetrically arranged around the lifting platform 7, each screw lifter 81 is installed on the test rack 1, and the screw rod top end of the screw lifter 81 is fixedly connected with the lifting platform 7 through bolts.

[0029] With reference to Figure 2 and Figure 3 The gear reverser 82 is arranged in three, the three gear reversers 82 are connected together through two linkage rods 83, the output shafts of the gear reversers 82 on both sides are respectively connected with the input shafts of one screw lifter 81 through one linkage rod 83, that is, the three gear reversers 82 and the six linkage rods 83 are matched to link together the four screw lifters 81, the driving motor 84 is installed on the test rack 1, the driving motor 84 preferably adopts a speed reducer, and the output shaft of the driving motor 84 is coaxially connected with the input shaft of one gear reverser 82 through one linkage rod 83; in use, one linkage shaft is driven to rotate through the driving motor 84, the gear reverser 82 is synchronously driven to start, under the transmission of the linkage rod 83, the screw rods of all the screw lifters 81 can be synchronously lifted, so that the purpose of driving the lifting platform 7 to lift is realized; in other embodiments, the driving motor 84 can also be replaced by a hand wheel, that is, the electric adjustment is replaced by manual adjustment, which is more beneficial to workers.

[0030] With reference to Figure 3 and Figure 4The mounting seat 9 and a horizontal adjusting mechanism 10 are further arranged on the lifting platform 7, the horizontal adjusting mechanism 10 is used for adjusting the position of the mounting seat 9 on the lifting platform 7, and the horizontal adjusting mechanism 10 comprises a first sliding plate 101, a first positioning structure 102, a second sliding plate 103 and a second positioning structure 104. Specifically, two first guide rails 105 parallel to each other are fixed on the lifting platform 7, a first sliding block 106 is slidably arranged on the first guide rail 105, the first sliding block 106 is connected with the first sliding plate 101 through bolts, the length direction of the first guide rail 105 is parallel to the width direction of the lifting platform 7, two second guide rails 107 parallel to each other are fixed on the first sliding plate 101, a second sliding block 108 is slidably arranged on the second guide rail 107, the second sliding block 108 is connected with the second sliding plate 103 through bolts, the length direction of the second guide rail 107 is parallel to the length direction of the lifting platform 7, that is, the sliding direction of the second sliding block 108 is perpendicular to the sliding direction of the first sliding block 106, and the mounting seat 9 is fixed on the second sliding plate 103 through bolts.

[0031] With reference to Figure 3 and Figure 4 , the first positioning structure 102 is used for positioning after the first sliding block 106 slides, the first positioning structure 102 comprises a first folding plate 1021 fixed on the side wall of the first sliding block 106 through bolts, a first bolt 1022 fixed on the first folding plate 1021, a first nut 1023 threadedly connected on the first bolt 1022, a first waist-shaped hole 1024 is formed on the side of the lifting platform 7 corresponding to the first guide rail 105, the length direction of the first waist-shaped hole 1024 is parallel to the length direction of the first guide rail 105, the bottom end of the first bolt 1022 is arranged through the first waist-shaped hole 1024, and the first nut 1023 is arranged on the bottom side of the lifting platform 7 and abuts against the bottom wall of the lifting platform 7. When in use, the first nut 1023 is loosened, so that the first nut 1023 is separated from the bottom wall of the lifting platform 7, then the first sliding block 106 is slid to drive the first sliding plate 101 to move, after the movement, the first nut 1023 is screwed to abut against the bottom wall of the lifting platform 7, so that the positioning of the first sliding block 106 is realized, and the positioning of the first sliding plate 101 is realized.

[0032] With reference to Figure 3 and Figure 4The second positioning structure 104 is used for positioning after the second sliding block 108 slides. The structure and use principle of the second positioning structure 104 are the same as those of the first positioning structure 102. Specifically, the second positioning structure 104 comprises a second folded plate 1041 fixed on the side wall of the second sliding block 108 by a bolt, a second bolt 1042 fixed on the second folded plate 1041, a second nut 1043 threadedly connected on the second bolt 1042, and a second waist-shaped hole 1044 provided on the first sliding plate 101 corresponding to the side of the second guide rail 107. The length direction of the second waist-shaped hole 1044 is parallel to the length direction of the second guide rail 107. The bottom end of the second bolt 1042 is arranged through the second waist-shaped hole 1044. The second nut 1043 is arranged on the bottom side of the first sliding plate 101 and abuts against the bottom wall of the first sliding plate 101.

[0033] With reference to Figure 2 , Figure 3 and Figure 5 , the transmission shaft 2 and the dynamic clamping structure 3 are both rotationally arranged on the mounting seat 9, and the transmission shaft 2 and the dynamic clamping structure 3 are coaxially arranged. The dynamic clamping structure 3 is dynamically clamped with one end of the transmission shaft 2. In this embodiment, the dynamic clamping structure 3 preferably adopts an electromagnetic clutch. The variable frequency motor 4 is fixed on the mounting seat 9 by bolts. The output shaft of the variable frequency motor 4 is connected with the driving part of the electromagnetic clutch. The transmission shaft 2 is connected with the driven part of the electromagnetic clutch. The clamping transmission assembly 6 is further arranged at the end of the transmission shaft 2 away from the dynamic clamping structure 3. The clamping transmission assembly 6 is used for realizing the detachable connection between the to-be-tested fan impeller and the transmission shaft 2. The mounting position 11 is arranged on the outside of the test stand 1. The bolt holes are provided around the mounting position 11, which can be used for mounting and fixing different models of to-be-tested fans. In use, the to-be-tested fan is mounted on the mounting position 11 by bolts. The impeller of the to-be-tested fan faces the transmission shaft 2, so as to facilitate the detachable connection of the clamping transmission assembly 6.

[0034] With reference to Figure 5 and Figure 6The clamping transmission assembly 6 includes a flange plate 61, a plug rod 62 and a shaft coupling 63. In the embodiment shown in the drawings, the fan to be tested is an EC fan, which uses an outer rotor motor as a driving source, that is, the impeller of the fan to be tested is installed on the shell of the outer rotor motor. Therefore, in the present application, the flange plate 61 is directly fixed on the shell of the outer rotor motor by bolts, one end of the plug rod 62 is integrally formed with the flange plate 61, the other end of the plug rod 62 is keyed connected with the shaft coupling 63, and the end of the shaft coupling 63 away from the plug rod 62 is keyed connected with the transmission shaft 2. In use, the flange plate 61 is first fixed on the fan to be tested, then the fan to be tested is installed on the installation position 11, and then the transmission shaft 2 and the shaft coupling 63 are moved close to the plug rod 62 by moving the second sliding plate 103 until the shaft coupling 63 and the plug rod 62 are plugged together, and then the position of the second sliding plate 103 is fixed, so that the circumferential fixing of the transmission shaft 2, the clamping transmission assembly 6 and the fan to be tested is realized.

[0035] With reference to Figure 5 and Figure 6 When the transmission shaft 2 and the fan to be tested are connected, the dynamic clamping structure 3 can be controlled to clamp the transmission shaft 2, and after the speed and direction of the variable frequency motor 4 are adjusted by the frequency converter, the variable frequency motor 4 is started to drive the dynamic clamping structure 3 to rotate, which synchronously drives the transmission shaft 2 to rotate, so as to realize the purpose of driving the impeller of the fan to be tested to rotate. When the speed of the impeller of the fan to be tested is stable, the dynamic clamping structure 3 is controlled to release the clamping of the transmission shaft 2. At this time, the fan to be tested is started by the upper computer 5, and the speed value of the impeller of the fan to be tested is synchronously collected. Since the transmission shaft 2 continues to rotate under the action of inertia, the speed value of the starting process of the fan to be tested is compared with the lowest speed value required for successful starting which is set in advance, so as to judge whether the fan to be tested is started successfully, thereby achieving the purpose of starting detection of the fan under the conditions of forward and reverse wind.

[0036] With reference to Figure 5 and Figure 6 By using the variable frequency motor 4 to drive the impeller of the fan to be tested to rotate in cooperation with the dynamic clamping structure 3, compared with the prior art which drives the impeller of the fan to be tested to rotate by using the air flow generated by the supporting fan, the speed of the impeller of the fan to be tested can be easily adjusted or fine-tuned, the direction of the impeller of the fan to be tested can be easily adjusted without disassembling the fan, and the use process is more convenient.

[0037] With reference to Figure 1 and Figure 7During the detection process of the to-be-detected fan, the rotation of the impeller of the to-be-detected fan will generate airflow. In order to avoid that small foreign matters in the external environment enter the impeller under the influence of the airflow and affect the normal start detection, the protection assembly 20 is detachably arranged on the test stand 1. The protection assembly 20 is used for isolating the to-be-detected fan, thereby protecting the periphery of the to-be-detected fan to ensure the normal start of the to-be-detected fan. The protection assembly 20 comprises a protection frame 201 and a protection net 202. The protection frame 201 adopts a rectangular frame structure. The protection net 202 is arranged on three sides and upper and lower end faces of the protection frame 201, that is, the protection net 202 and the protection frame 201 form a cover structure with a single opening. A roller 203 is arranged at the lower end of the protection frame 201, which facilitates the movement of the protection frame 201 by workers. When the single opening of the protection frame 201 is aligned with the to-be-detected fan, the protection frame 201 is pushed to be close to the test stand 1, so that the side wall of the protection frame 201 abuts against the side wall of the test stand 1. At this time, the protection net 202 and the mounting position 11 form an air-permeable protection area, and the to-be-detected fan is located in the air-permeable protection area. In this way, the protection of the to-be-detected fan can be realized.

[0038] With reference to Figure 7 and Figure 8 In addition, the locking mechanism 12 is arranged on the test stand 1. The locking mechanism 12 is used for locking the protection frame 201 and the test stand 1 together, so as to prevent the protection frame 201 from being separated from the test stand 1 during the start of the to-be-detected fan. The locking mechanism 12 comprises two groups, and the two locking mechanisms 12 are arranged on the test stand 1 at the two sides of the corresponding mounting position 11. The locking mechanism 12 comprises a rotating plate 121 and a locking bolt 122. One end of the rotating plate 121 is rotatably connected to the test stand 1, and the locking bolt 122 is arranged at the other end of the rotating plate 121. A positioning hole is arranged on the protection frame 201, and the locking bolt 122 is threadedly connected with the positioning hole. During use, when the side wall of the protection frame 201 abuts against the test stand 1, the rotating plate 121 is rotated to align the locking bolt 122 with the positioning hole. Then, the locking bolt 122 is screwed into the positioning hole, so that the protection frame 201 can be locked.

[0039] The implementation principle of the embodiment of the application is as follows: in use, first, the flange plate 61 is installed on the fan to be tested, the fan to be tested is installed on the installation site 11, the protective frame 201 is moved to cover the fan to be tested in the protective net 202, and the position of the protective frame 201 is locked through the locking mechanism 12; second, the position of the mounting seat 9 is adjusted by adjusting the height of the lifting platform 7 and the horizontal position of the first sliding plate 101, so that the transmission shaft 2, the coupling 63 and the insertion rod 62 are coaxial, then the second sliding plate 103 is pushed to make the coupling 63 and the insertion rod 62 be inserted and fixed to form a key connection, the position of the second sliding plate 103 is fixed, then the dynamic clamping structure 3 is started, and the transmission shaft 2 is clamped through the dynamic clamping structure 3; the speed and direction of the variable frequency motor 4 are adjusted through the frequency converter, when the output shaft of the variable frequency motor 4 rotates, the dynamic clamping structure 3 is driven to rotate, so that the impeller of the fan to be tested is driven to rotate synchronously under the cooperation of the transmission shaft 2, the coupling 63 and the insertion rod 62, when the speed of the impeller of the fan to be tested tends to be stable, the dynamic clamping structure 3 is loosened to clamp the transmission shaft 2, and the fan to be tested is immediately started through the upper computer 5, at this time, the transmission shaft 2 and the impeller of the fan to be tested continue to rotate under the action of inertia, and the fan to be tested is started to simulate the starting process of the fan in the forward and reverse wind state under the actual working condition; after the fan to be tested is started, the speed value of the impeller of the fan to be tested is synchronously collected by the upper computer 5, and the collected speed value is compared with the lowest speed value required for the successful starting of the fan to be tested in the forward and reverse wind state, so that whether the fan to be tested is successfully started can be judged, and whether the performance of the fan to be tested is good can be judged. At the same time, in order to ensure the accuracy of the test result, the above test steps can be repeated to test the fan to be tested for multiple times, if the test results of multiple times are all successful starting, it is proved that the performance index of the fan to be tested meets the standard; if the test results of one or more times are starting failure, the fan to be tested is removed after failure, the worker removes the fault problem, and the fan to be tested is installed on the test frame 1 again for re-detection after the removal is completed, until the test results of multiple times are all successful, and then the next fan to be tested is replaced.

[0040] Embodiment 2 With reference to Figure 9The difference between the embodiment and embodiment 1 is that the insertion rod 62 and the shaft coupling 63 are fixedly connected, the shaft coupling 63 and the transmission shaft 2 are key connected, and the positioning detection protrusion 30 is arranged on the outer side wall of the shaft coupling 63, and the laser sensor 40 is arranged on the test stand 1, the laser sensor 40 is used for detecting the position of the positioning detection protrusion 30 in real time, and is compared with the initial position of the positioning detection protrusion 30, in the embodiment, the probe of the laser sensor 40 is aligned in the tangent direction of the shaft coupling 63, so as to judge whether the positioning detection protrusion 30 rotates, whether the shaft coupling 63 rotates and the corresponding rotating speed, and the detection result is compared with the rotating speed of the variable frequency motor 4 and the rotating speed of the to-be-tested fan detected by the upper computer 5, so as to judge the matching transmission effect of the transmission shaft 2 and the clamping transmission assembly 6, and the detection of the worker after installing the clamping transmission assembly 6 is also realized, so as to ensure that the starting detection process of the to-be-tested fan is normally carried out.

[0041] The implementation principle of the embodiment of the application is as follows: in use, first, the flange plate 61 is installed on the to-be-tested fan, at this time, the shaft coupling 63 is fixed on the to-be-tested fan, then the to-be-tested fan is installed on the installation position 11, the protective frame 201 is moved to cover the to-be-tested fan in the protective net 202, and the position of the protective frame 201 is locked through the locking mechanism 12; secondly, after the position of the mounting seat 9 is adjusted by adjusting the height of the lifting table 7 and the horizontal position of the first sliding plate 101, so that the transmission shaft 2 and the shaft coupling 63 are coaxial, the second sliding plate 103 is pushed, the shaft coupling 63 is inserted and fixed with the transmission shaft 2 to form a key connection, after the position of the second sliding plate 103 is fixed, the dynamic clamping structure 3 is started, and the transmission shaft 2 is clamped through the dynamic clamping structure 3; then the rotating speed and direction of the variable frequency motor 4 are adjusted through the frequency converter, when the output shaft of the variable frequency motor 4 rotates, the dynamic clamping structure 3 is driven to rotate, so that the impeller of the to-be-tested fan is synchronously rotated under the cooperation of the transmission shaft 2, the shaft coupling 63 and the insertion rod 62, in this process, the laser sensor 40 cooperates with the positioning detection protrusion 30 to realize the monitoring of the rotating state of the shaft coupling 63, so as to judge whether the shaft coupling 63 rotates normally and whether the rotating speed is consistent with the rotating speed of the variable frequency motor 4, if the shaft coupling 63 does not rotate or the rotating speed is obviously smaller than the rotating speed of the variable frequency motor 4, it is proved that the connection between the transmission shaft 2 and the shaft coupling 63 is unstable, and needs to be adjusted, at this time, the upper computer 5 sends a prompt signal and controls the variable frequency motor 4 to stop running, and reminds the worker to detect the connection between the shaft coupling 63 and the transmission shaft 2; if the rotating speed difference between the shaft coupling 63 and the variable frequency motor 4 is within the error range, the subsequent forward and reverse wind detection is normally carried out, and the detection steps are the same as those of embodiment 1.

[0042] Embodiment 3: The embodiment is different from the embodiment 1 in that the dynamic clamping structure 3 adopts a three-jaw chuck in the embodiment, that is, a connecting flange is coaxially fixedly connected on the output shaft of the variable frequency motor 4, the connecting flange is fixedly connected with a disc body of the three-jaw chuck, and one end of the transmission shaft 2 extends into the middle of three clamping jaws of the three-jaw chuck. In use, the three clamping jaws of the three-jaw chuck clamps the transmission shaft 2 after the three-jaw chuck is started. At this time, the output shaft of the variable frequency motor 4 rotates to drive the three-jaw chuck to rotate, thereby driving the transmission shaft 2 to rotate. When the clamping jaws of the three-jaw chuck are loosened to clamp the transmission shaft 2, the transmission shaft 2 continues to rotate under the action of inertia. At this time, the starting of the fan to be measured is controlled by the upper computer 5, so that the purpose of starting detection of the fan in the wind state and the reverse wind state can be achieved.

[0043] The above are preferred embodiments of the application, and are not intended to limit the protection scope of the application. Therefore, equivalent changes made on the basis of the structure, shape, and principle of the application should be covered within the protection scope of the application.

Claims

1. A wind turbine start-up detection system for both forward and reverse winds, characterized in that: The utility model provides a wind turbine test device, including test frame (1), transmission shaft (2) and dynamic clamping structure (3) rotate on test frame (1), variable frequency motor (4) for controlling dynamic clamping structure (3) rotation, host computer (5) set up on test frame (1), the installation site (11) for installing the fan to be measured is provided on test frame (1), dynamic clamping structure (3) is used for dynamic clamping transmission shaft (2), the transmission shaft (2) is provided with the joint transmission assembly (6) away from dynamic clamping structure (3) one end, and the transmission shaft (2) and joint transmission assembly (6) cooperate to realize the transmission between dynamic clamping structure (3) and the impeller of fan to be measured, host computer (5) is used to control the running and shutdown of fan to be measured and gather the rotational speed data of impeller in fan to be measured, after dynamic clamping structure (3) clamps transmission shaft (2), variable frequency motor (4) drives dynamic clamping structure (3) to rotate, drives the impeller rotation of fan to be measured under the cooperation transmission of transmission shaft (2) and joint transmission assembly (6) to simulate the rotation of impeller of fan to be measured in actual working condition under the state of head wind and adverse wind, controls the clamping of dynamic clamping structure (3) to transmission shaft (2) after the rotational speed of fan to be measured is stable, and immediately starts fan to be measured through host computer (5), and whether the rotational speed value of fan to be measured reaches the set value according to the acquisition of host computer (5) judges whether fan to be measured starts successfully.

2. The system for detecting forward and reverse starting of a fan according to claim 1, wherein: The utility model provides a wind turbine test device, including test frame (1), transmission shaft (2) and dynamic clamping structure (3) rotate on test frame (1), variable frequency motor (4) for controlling dynamic clamping structure (3) rotation, host computer (5) set up on test frame (1), the installation site (11) for installing the fan to be measured is provided on test frame (1), dynamic clamping structure (3) is used for dynamic clamping transmission shaft (2), the transmission shaft (2) is provided with the joint transmission assembly (6) away from dynamic clamping structure (3) one end, and the transmission shaft (2) and joint transmission assembly (6) cooperate to realize the transmission between dynamic clamping structure (3) and the impeller of fan to be measured, host computer (5) is used to control the running and shutdown of fan to be measured and gather the rotational speed data of impeller in fan to be measured, after dynamic clamping structure (3) clamps transmission shaft (2), variable frequency motor (4) drives dynamic clamping structure (3) to rotate, drives the impeller rotation of fan to be measured under the cooperation transmission of transmission shaft (2) and joint transmission assembly (6) to simulate the rotation of impeller of fan to be measured in actual working condition under the state of head wind and adverse wind, controls the clamping of dynamic clamping structure (3) to transmission shaft (2) after the rotational speed of fan to be measured is stable, and immediately starts fan to be measured through host computer (5), and whether the rotational speed value of fan to be measured reaches the set value according to the acquisition of host computer (5) judges whether fan to be measured starts successfully.

3. The system according to claim 2, wherein: The utility model provides a wind turbine test device, including test frame (1), transmission shaft (2) and dynamic clamping structure (3) rotate on test frame (1), variable frequency motor (4) for controlling dynamic clamping structure (3) rotation, host computer (5) set up on test frame (1), the installation site (11) for installing the fan to be measured is provided on test frame (1), dynamic clamping structure (3) is used for dynamic clamping transmission shaft (2), the transmission shaft (2) is provided with the joint transmission assembly (6) away from dynamic clamping structure (3) one end, and the transmission shaft (2) and joint transmission assembly (6) cooperate to realize the transmission between dynamic clamping structure (3) and the impeller of fan to be measured, host computer (5) is used to control the running and shutdown of fan to be measured and gather the rotational speed data of impeller in fan to be measured, after dynamic clamping structure (3) clamps transmission shaft (2), variable frequency motor (4) drives dynamic clamping structure (3) to rotate, drives the impeller rotation of fan to be measured under the cooperation transmission of transmission shaft (2) and joint transmission assembly (6) to simulate the rotation of impeller of fan to be measured in actual working condition under the state of head wind and adverse wind, controls the clamping of dynamic clamping structure (3) to transmission shaft (2) after the rotational speed of fan to be measured is stable, and immediately starts fan to be measured through host computer (5), and whether the rotational speed value of fan to be measured reaches the set value according to the acquisition of host computer (5) judges whether fan to be measured starts successfully.

4. The system for detecting forward and reverse starting of a fan according to claim 2, wherein: The horizontal adjusting mechanism (10) comprises a first sliding plate (101) slidingly arranged on a lifting platform (7), a first positioning structure (102) arranged on the lifting platform (7) for positioning the first sliding plate (101) after sliding, a second sliding plate (103) slidingly arranged on the first sliding plate (101), and a second positioning structure (104) for positioning the second sliding plate (103) after sliding, the mounting seat (9) is fixed on the second sliding plate (103), and sliding directions of the first sliding plate (101), the second sliding plate (103) and the lifting platform (7) are perpendicular to each other.

5. The system for detecting forward and reverse starting of a fan according to claim 1, wherein: The clamping transmission assembly (6) comprises a flange plate (61) for connecting an outer rotor motor shell in the to-be-tested fan, a plug rod (62) fixed on the flange plate (61), and a shaft coupling (63) arranged between the plug rod (62) and the transmission shaft (2), and the shaft coupling (63) is fixed in the circumferential direction with the transmission shaft (2) and the plug rod (62) by means of key connection at both ends.

6. The system for detecting forward and reverse starting of a fan according to claim 1, wherein: The test rack (1) is detachably provided with a protection assembly (20), and the protection assembly (20) is used for protecting the side of the to-be-tested fan to ensure the normal starting of the to-be-tested fan.

7. The system according to claim 6, wherein: The protection assembly (20) comprises a protection frame (201) and a protection net (202) arranged on the protection frame (201), the protection net (202) and the mounting position (11) form an air-permeable protection area, the to-be-tested fan can be installed in the air-permeable protection area, the protection frame (201) is provided with a roller (203) at the bottom end, and the test rack (1) is provided with a locking mechanism (12) for preventing the protection frame (201) from being separated from the test rack (1).

8. The system according to claim 7, wherein: The locking mechanism (12) comprises a rotating plate (121) rotatably arranged on the test rack (1) and a locking bolt (122) arranged on the rotating plate (121), the protection frame (201) is provided with a positioning hole, and the locking bolt (122) is threadedly matched with the positioning hole.

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