Dynamic balance testing device for magnetic suspension fan impeller

Abstract

The invention relates to the technical field of dynamic balance testing, in particular to a magnetic suspension fan impeller dynamic balance testing device which comprises a supporting table, a speed adjusting mechanism used for adjusting the speed of a belt is arranged in the middle of the top of the supporting table, and a lateral clamping mechanism used for laterally clamping and fixing an impeller rotor is arranged on the left side of the middle of the top of the supporting table. The right side of the top of the supporting table is fixedly connected with a second end fixing mechanism, and the left side of the top of the supporting table is slidably provided with a first end fixing mechanism. Through arrangement of the end fixing mechanisms, the rotating disc and the lateral clamping mechanism, multi-stage clamping and fixing of an impeller rotor are achieved, the clamping stability is improved, and the test error is reduced; when the lateral clamping mechanism carries out radial clamping on the impeller rotor, axial limiting and radial crimping are carried out on the belt driving the impeller rotor to rotate at the same time, the belt is prevented from slipping, the influence of belt slipping on a dynamic balance test result is avoided, and the test accuracy is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of dynamic balance testing, and particularly relates to a dynamic balance testing device for a magnetic levitation blower impeller. Background Art

[0002] A magnetic levitation blower is a blower device that utilizes magnetic levitation bearing technology. Compared with traditional blowers, it suspends the rotor through magnetic force, thereby eliminating mechanical contact, reducing friction loss and noise, and improving efficiency and reliability. Magnetic levitation blowers have a wide range of application scenarios and are also used in the refrigeration industry. The impeller rotor in a magnetic levitation blower is one of the most important parts. The impeller rotor mainly includes a central shaft and impellers installed at both ends of it. As shown in the appendix Figure 11 When magnetic levitation occurs, the entire impeller rotor is suspended, so it is necessary to perform dynamic balance testing on the impeller rotor as a whole. The following problems exist during the testing:

[0003] 1. During testing, usually, after clamping and fixing the blower impeller rotor with a fixture, a tensioned belt is sleeved on the central shaft of the impeller rotor, and the motor drives the belt to rotate, thereby driving the overall rotation of the impeller rotor. However, the belt relies on the tension force of the tensioning wheel to ensure the friction force between the belt and the central shaft. When the belt drives the impeller to rotate at high speed, there is no limiting mechanism on both sides of the belt sleeved on the central shaft. Therefore, when the dynamic balance of the impeller rotor is not good, the belt is prone to slipping under vibration, which exacerbates the vibration of the impeller rotor and thus reduces the accuracy of the testing.

[0004] 2. When performing dynamic balance testing on the blower impeller rotor, it is necessary to test the dynamic balance performance of the impeller rotor at different speeds, especially the dynamic balance performance at the critical speed. However, since the testing equipment uses the belt as the power source, the faster the motor speed, the easier it is for the belt to reduce the pressure between the belt and the central shaft under the action of centrifugal force, and thus the easier it is to slip. Therefore, at different speeds, the tension uniformity of the belt needs to be adjusted correspondingly. However, the existing equipment needs to adjust the belt tension after adjusting the speed and is difficult to adaptively adjust itself, thereby reducing the testing efficiency. Summary of the Invention

[0005] The purpose of the present invention is to provide a dynamic balance testing device for a magnetic levitation blower impeller with a simple structure and reasonable design to solve the above problems.

[0006] The present invention achieves the above purpose through the following technical solutions:

[0007] A dynamic balance test device for a magnetic levitation fan impeller, comprising a support platform. A speed regulating mechanism is arranged on the top of the support platform, and a lateral clamping mechanism is arranged on the left side of the top of the support platform. A second end fixing mechanism is fixedly connected to the right side of the top of the support platform, and a first end fixing mechanism is slidably arranged on the left side of the top of the support platform;

[0008] A column is arranged on the right front side of the support platform. The top of the column is hinged with a mounting rod, and a dynamic balance measuring instrument is arranged on the mounting rod;

[0009] The lateral clamping mechanism includes a clamping component and a pressing component. The pressing component is arranged on the clamping component. The clamping component includes a lead screw module fixedly connected to the top of the support platform. A bidirectional lead screw is rotatably connected inside the lead screw module, and a third servo motor is installed on the front side of the lead screw module. The output end of the third servo motor rotatably penetrates through the front side of the lead screw module and is fixedly connected to the front end of the bidirectional lead screw. Clamping arms are respectively threadedly connected to both ends of the bidirectional lead screw; The pressing component includes second side plates fixedly connected to the clamping arms. Two connecting plates are fixedly installed on each of the two second side plates. An arc-shaped clamping plate is fixedly installed on the side of the connecting plate close to the center of the lead screw module, and the two arc-shaped clamping plates on the same side limit and prevent slipping of the belt.

[0010] Preferably, a limiting groove is opened on the left side of the top of the support platform. A unidirectional lead screw is rotatably connected inside the limiting groove. A movable block is threadedly connected to the unidirectional lead screw through a ball nut. The movable block is slidably connected inside the limiting groove. The top of the movable block is fixedly connected to the bottom of the first end fixing mechanism. A first servo motor is fixedly installed at the center of the left side of the support platform, and the output end of the first servo motor is fixedly connected to the left end of the unidirectional lead screw.

[0011] Preferably, the first end fixing mechanism and the second end fixing mechanism have the same structure. The first end fixing mechanism includes a lifting component, a lifting plate, a supporting roller and a pressing component. The lifting plate is arranged on the lifting component, and the pressing component is arranged on the lifting plate. The lifting component includes a fixed base fixedly installed on the top of the movable block. A hydraulic cylinder is fixedly installed at the center inside the fixed base. The top of the output end of the hydraulic cylinder is fixedly installed with a lifting plate. Guide rods are slidably penetrated through the front and rear sides of the fixed base, and the tops of the two guide rods are fixedly connected to the bottom of the lifting plate. Two supporting rollers for supporting the end of the impeller rotor are rotatably connected to the top of the lifting plate.

[0012] Preferably, the pressing component includes a second fixing seat fixedly installed on the front side of the top of the lifting plate. A reverse U-shaped frame is hinged to the top of the second fixing seat. A limiting cylinder is fixedly arranged on the top of the reverse U-shaped frame. A movable rod is slidably connected inside the limiting cylinder. The bottom of the movable rod is rotatably connected to a third pressing wheel. A locking handle for pressing and locking the movable rod is fixedly installed outside the limiting cylinder. A plugging rod is fixedly installed at one end of the reverse U-shaped frame away from the second fixing seat. A first fixing seat is slidably sleeved outside the plugging rod, and the first fixing seat is fixedly installed on the rear side of the top of the lifting plate.

[0013] Preferably, two second side plates are slidably penetrated through the centers thereof by second spring telescopic rods. On the sides of the two second spring telescopic rods close to each other, second mounting frames are fixedly connected. On the second mounting frames, second pressing wheels for pressing the belt are rotatably mounted. At the top of the rear second side plate, an L-shaped rod is provided. The top of the horizontal section of the L-shaped rod is slidably penetrated through by a first spring telescopic rod. At the bottom of the first spring telescopic rod, a first mounting frame is fixedly installed. At the bottom of the first mounting frame, a first pressing wheel is rotatably connected.

[0014] Preferably, electric slide rails are fixedly installed on both the left and right sides of the support platform. On the tops of the two electric slide rails, electric sliders are slidably connected. On the tops of the electric sliders, lifting rods are fixedly connected. At the tops of the lifting rods, fixed rods are fixedly installed. On the side of the fixed rod close to the support platform, a rotating disc for limiting the end face of the impeller rotor is rotatably connected.

[0015] Preferably, the speed regulating mechanism includes a fixing plate fixedly connected to the top of the support platform. On the fixing plate, a driving component, a speed regulating component and a tensioning component are provided. The speed regulating component is arranged below the driving component, and the tensioning component is arranged on the speed regulating component. On the left side of the fixing plate, a plurality of fixed belt pulleys are rotatably installed. A chute is formed on the fixing plate. Inside the chute, a limiting slider is slidably connected. The middle of the limiting slider is rotatably penetrated through by a mounting shaft. At the left end of the mounting shaft, a moving belt pulley is fixedly sleeved. A belt is commonly sleeved outside the plurality of fixed belt pulleys and the moving belt pulley. The top of the belt is sleeved outside the impeller rotor.

[0016] Preferably, the driving component includes a second servo motor fixedly installed on the right side of the fixing plate. At the output end of the second servo motor, a conical friction cylinder is fixedly installed.

[0017] Preferably, the speed regulating component includes two first side plates fixedly installed on the right side of the fixing plate. A fixed shaft is rotatably penetrated through the right sides between the two first side plates. At the front end of the fixed shaft, a rotating handle is fixedly connected. In the middle of the fixed shaft, a threaded rod is fixedly sleeved. In the middle of the threaded rod, a moving block is threadedly connected. At the bottom of the moving block, a connecting frame is fixedly installed. The end of the connecting frame away from the moving block is connected to the limiting slider.

[0018] Preferably, the tensioning component includes a rotating shaft rotatably connected between the left sides of the two first side plates. And an installation cylinder is slidably sleeved on the middle of the rotating shaft. A friction wheel is fixedly sleeved outside the installation cylinder. The top outside the friction wheel is attached to the bottom outside the conical friction cylinder. Two shift forks are fixedly installed on the left side of the moving block. The shift forks are rotatably sleeved outside the installation cylinder. At the front end of the installation cylinder, a driving bevel gear is fixedly installed. At the right end of the installation shaft, a driven bevel gear meshing with the driving bevel gear is fixedly sleeved.

[0019] The beneficial effects of the present invention are as follows:

[0020] 1. The present invention supports and presses and limits the ends of the impeller rotor through the first end fixing mechanism and the second end fixing mechanism, realizing the primary limit clamping of the impeller rotor. The first end fixing mechanism can slide along the support table, which is applicable to the tests of impeller rotors of different sizes. The rotating disk is used to axially press and limit the end faces at both ends of the impeller rotor, realizing the secondary limit clamping. The lateral clamping mechanism is used to radially clamp and limit the impeller rotor, realizing the tertiary limit clamping, which is conducive to realizing the stable clamping of the impeller rotor through multi-level limit clamping, reducing the vibration caused by unstable clamping during the test, and reducing the test error.

[0021] 2. During the process of the lateral clamping mechanism of the present invention radially clamping and clamping the impeller rotor, the belt used to drive the impeller rotor to rotate is located between two arc-shaped clamping plates. The arc-shaped clamping plates axially limit the belt to prevent the belt from axially slipping when rotating at high speed. Moreover, the pressing wheel in the pressing component radially presses and fixes the belt pulley to prevent the belt from slipping. And the three pressing wheels are arranged in a triangle, with strong stability, further improving the stability of the belt, avoiding the influence of belt slipping on the dynamic balance test result, and improving the accuracy of the test.

[0022] 3. Through the setting of the speed regulating mechanism, the present invention realizes the adjustment of the belt speed, facilitating the dynamic balance test of the impeller rotor at different speeds. And during the speed regulation process, the tensioning component is synchronously driven, realizing the synchronous adjustment of the belt tension during the speed regulation process, that is, the faster the speed, the greater the belt tension, without separate adjustment, saving time and effort, and improving the test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is the three-dimensional view of the overall structure of the present invention;

[0024] Figure 2 is the three-dimensional view of the partial structure of the present invention;

[0025] Figure 3 is the partial sectional view of the first end fixing mechanism of the present invention;

[0026] Figure 4 is the three-dimensional view of the support table, speed regulating mechanism and lateral clamping mechanism of the present invention;

[0027] Figure 5 is the front view of the speed regulating mechanism of the present invention;

[0028] Figure 6 is the three-dimensional view of the speed regulating mechanism of the present invention;

[0029] Figure 7 is the three-dimensional view of the speed regulating component, driving belt pulley, limit slider and mounting shaft of the present invention;

[0030] Figure 8 is the Figure 7 schematic enlarged view of area A in the present invention;

[0031] Figure 9 is the three-dimensional view of the moving block and the fork of the present invention;

[0032] Figure 10 is the three-dimensional view of the lateral clamping mechanism of the present invention;

[0033] Figure 11 is the three-dimensional view of the impeller rotor of the present invention.

[0034] In the figure: 1. Support platform; 2. Speed regulation mechanism; 21. Fixed plate; 22. Driving assembly; 221. Second servo motor; 222. Conical friction cylinder; 23. Speed regulation component; 231. Fixed shaft; 232. Threaded rod; 233. First side plate; 234. Connecting frame; 235. Moving block; 24. Tensioning component; 241. Rotating shaft; 242. Driven bevel gear; 243. Driving bevel gear; 244. Friction wheel; 245. Fork; 246. Installation cylinder; 25. Fixed pulley; 26. Movable pulley; 27. Chute; 28. Limit slider; 29. Installation shaft; 3. Lateral clamping mechanism; 31. Clamping component; 311. Third servo motor; 312. Lead screw module; 313. Clamping arm; 314. Arc-shaped clamping plate; 315. Connecting plate; 32. Pressing component; 321. L-shaped rod; 322. First spring telescopic rod; 323. First mounting frame; 324. First pressing wheel; 325. Second pressing wheel; 326. Second mounting frame; 327. Second spring telescopic rod; 328. Second side plate; 4. First end fixing mechanism; 41. Lifting component; 411. Fixed base; 412. Hydraulic cylinder; 413. Guide rod; 42. Lifting plate; 43. Supporting roller; 44. Pressing component; 441. Movable rod; 442. Limit cylinder; 443. First fixing seat; 444. Inverted U-shaped frame; 445. Second fixing seat; 446. Third pressing wheel; 447. Inserting rod; 5. First servo motor; 6. Electric slide rail; 7. Electric slider; 8. Lifting rod; 9. Fixed rod; 10. Rotating disc; 11. Dynamic balance measuring instrument; 12. Mounting rod; 13. Second end fixing mechanism; 14. Movable block; 15. Limit groove; 16. One-way lead screw. Specific embodiments

[0035] The following further describes the present application in detail with reference to the accompanying drawings. It is necessary to point out here that the following specific embodiments are only used to further illustrate the present application and cannot be understood as limiting the protection scope of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application according to the above application content.

[0036] Embodiment: Please refer to Figure 1, A dynamic balance test device for a magnetic levitation fan impeller, including a support platform 1. In the middle of the top of the support platform 1, there is a speed regulation mechanism 2 for adjusting the speed of the belt. And on the left side of the middle of the top of the support platform 1, there is a lateral clamping mechanism 3 for laterally clamping and fixing the impeller rotor. On the right side of the top of the support platform 1, there is a second end fixing mechanism 13 fixedly connected. On the left side of the top of the support platform 1, there is a first end fixing mechanism 4 slidably arranged. The first end fixing mechanism 4 and the second end fixing mechanism 13 have exactly the same structure. On the right front side of the support platform 1, there is a column. At the top of the column, there is a mounting rod 12 hinged, and at the hinge of the column and the mounting rod 12, there is a tightening screw. On the mounting rod 12, there is a dynamic balance measuring instrument 11 for performing dynamic balance tests on the impeller. On both the left and right sides of the support platform 1, there are electric slide rails 6 fixedly installed. On the top of both electric slide rails 6, there are electric sliders 7 slidably connected. On the top of the electric slider 7, there is a lifting rod 8 fixedly connected. On the top of the lifting rod 8, there is a fixing rod 9 fixedly installed. On the lifting rod 8, there is a locking handle. On the side of the fixing rod 9 close to the support platform 1, there is a rotating disk 10 rotatably connected for limiting the end face of the impeller rotor.

[0037] During use, the two ends of the impeller rotor are supported, limited, and pressed from the top by the first end fixing mechanism 4 and the second end fixing mechanism 13, realizing the primary limit clamping of the impeller rotor. The lateral clamping mechanism 3 is used to perform radial limit clamping on the impeller rotor, realizing the secondary limit clamping. The rotating disk 10 is used to axially press and limit the end face of the impeller rotor, realizing the tertiary limit clamping. The dynamic balance measuring instrument 11 is used to perform dynamic balance tests on the impeller rotor. Loosen the locking handle and pull the fixing rod 9 up or down, then the height adjustment of the fixing rod 9 and the rotating disk 10 thereon is realized, which is convenient for limiting the end faces of impeller rotors of different sizes.

[0038] Please refer to Figure 1 , Figure 2 and Figure 4 , on the left side of the top of the support platform 1, there is a limit groove 15 opened. Inside the limit groove 15, there is a one-way lead screw 16 rotatably connected. On the one-way lead screw 16, there is a movable block 14 threadedly connected through a ball nut. The movable block 14 is slidably connected inside the limit groove 15. The top of the movable block 14 is fixedly connected to the bottom of the first end fixing mechanism 4. In the center of the left side of the support platform 1, there is a first servo motor 5 fixedly installed. The output end of the first servo motor 5 is fixedly connected to the left end of the one-way lead screw 16. During use, the cooperation of the first servo motor 5, the movable block 14, and the one-way lead screw 16 realizes the left and right lateral movement of the first end fixing mechanism 4, which is suitable for clamping and testing impeller rotors of different sizes.

[0039] Please refer to Figure 2 and Figure 3, the first end fixing mechanism 4 includes a lifting assembly 41, a lifting plate 42, a supporting roller 43 and a crimping assembly 44. The lifting plate 42 is arranged on the lifting assembly 41, and the crimping assembly 44 is arranged on the lifting plate 42. The lifting assembly 41 includes a fixed base 411 fixedly installed on the top of the movable block 14. A hydraulic cylinder 412 is fixedly installed at the center inside the fixed base 411. The top of the output end of the hydraulic cylinder 412 is fixedly installed with a lifting plate 42. Guide rods 413 are slidably penetrated through the front and rear sides of the fixed base 411. The tops of the two guide rods 413 are fixedly connected to the bottom of the lifting plate 42. Two supporting rollers 43 for supporting the end of the impeller rotor are symmetrically and rotatably connected to the front and rear of the top of the lifting plate 42.

[0040] Please refer to Figure 2 and Figure 3 , the crimping assembly 44 includes a second fixed seat 445 fixedly installed on the front side of the top of the lifting plate 42. A reverse U-shaped frame 444 is hinged to the top of the second fixed seat 445. A limiting cylinder 442 is fixedly arranged on the top of the reverse U-shaped frame 444. A movable rod 441 is slidably connected inside the limiting cylinder 442. A third crimping wheel 446 is rotatably connected to the bottom of the movable rod 441. A locking handle for crimping and locking the movable rod 441 is fixedly installed outside the limiting cylinder 442. A plugging rod 447 is fixedly installed at one end of the reverse U-shaped frame 444 away from the second fixed seat 445. A first fixed seat 443 is slidably sleeved outside the plugging rod 447, and a slant groove is opened at the top of the first fixed seat 443 to prevent interference when the plugging rod 447 is plugged in and pulled out. The first fixed seat 443 is fixedly installed on the rear side of the top of the lifting plate 42. The plugging rod 447 and the first fixed seat 443 are locked and fixed by the locking handle.

[0041] Please refer to Figure 4 , Figure 5 and Figure 6 , the speed regulating mechanism 2 includes a fixing plate 21 fixedly connected to the top of the support table 1. A driving assembly 22, a speed regulating assembly 23 and a tensioning assembly 24 are arranged on the fixing plate 21. The speed regulating assembly 23 is arranged below the driving assembly 22, and the tensioning assembly 24 is arranged on the speed regulating assembly 23. A plurality of fixed belt pulleys 25 are rotatably installed on the left side of the fixing plate 21. A chute 27 is opened on the fixing plate 21. A limiting slider 28 is slidably connected inside the chute 27. A mounting shaft 29 is rotatably penetrated through the middle of the limiting slider 28. A movable belt pulley 26 is fixedly sleeved on the left end of the mounting shaft 29. A belt is commonly sleeved outside the plurality of fixed belt pulleys 25 and the movable belt pulley 26. The top of the belt is sleeved outside the impeller rotor.

[0042] Please refer to Figure 5 , Figure 7 , Figure 8 and Figure 9, the driving assembly 22 includes a second servo motor 221 fixedly installed on the right side of the fixing plate 21. A conical friction cylinder 222 is fixedly installed at the output end of the second servo motor 221. The speed regulation assembly 23 includes two first side plates 233 fixedly installed symmetrically before and after on the right side of the fixing plate 21. A fixing shaft 231 is rotatably penetrated through the right side between the two first side plates 233. A rotating handle is fixedly connected to the front end of the fixing shaft 231. A threaded rod 232 is fixedly sleeved in the middle of the fixing shaft 231. A moving block 235 is threadedly connected to the middle of the threaded rod 232. A connecting frame 234 is fixedly installed at the bottom of the moving block 235. One end of the connecting frame 234 away from the moving block 235 is connected to the limiting slider 28.

[0043] Please refer to Figure 5 , Figure 7 , Figure 8 and Figure 9 , the tensioning assembly 24 includes a rotating shaft 241 rotatably connected to the left side between the two first side plates 233. An installation cylinder 246 is slidably sleeved in the middle of the rotating shaft 241. A friction wheel 244 is fixedly sleeved outside the installation cylinder 246. The top outside the friction wheel 244 is attached to the bottom outside the conical friction cylinder 222. Two fork-shaped levers 245 are fixedly installed on the left side of the moving block 235. The fork-shaped levers 245 are rotatably sleeved outside the installation cylinder 246. A number of balls are installed for rolling inside the inner wall of the fork-shaped levers 245, effectively reducing the friction between the fork-shaped levers 245 and the installation cylinder 246. A driving bevel gear 243 is fixedly installed at the front end of the installation cylinder 246. A driven bevel gear 242 meshing with the driving bevel gear 243 is fixedly sleeved at the right end of the installation shaft 29. The conical friction cylinder 222 and the second servo motor 221 are inclinedly installed to ensure that the friction wheel 244 always remains in contact with the conical friction cylinder 222 while sliding along the rotating shaft 241. Moreover, the outside of the conical friction cylinder 222 is made of a frosted material, with a relatively large friction force between it and the friction wheel 244.

[0044] During use, first loosen the buckle between the insertion rod 447 and the first fixed seat 443. At this time, turn the inverted U-shaped frame 444 around the hinged position, open the inverted U-shaped frame 444, that is, expose the supporting roller 43. Then pass the belt around the fixed pulley 25 and the moving pulley 26. Subsequently, use a crane to hoist the impeller rotor to be measured to the top of the equipment, put the belt on the middle part of the impeller rotor, lower the crane, place the bottom ends of both ends of the impeller rotor between the two supporting rollers 43, and use the supporting rollers 43 to support and limit the impeller rotor. At this time, loosen the locking handle on the limiting cylinder 442, lower the movable rod 441, and synchronously drive the third pressing wheel 446 to descend until the bottom of the third pressing wheel 446 fits against the top of both ends of the impeller rotor. Then lock the handle, realizing the limiting and fixing of both ends of the impeller rotor and achieving the primary clamping of the impeller rotor. When it is necessary to adjust the overall height of the impeller rotor, start the hydraulic cylinder 412. The output end of the hydraulic cylinder 412 drives the lifting plate 42 and the supporting roller 43 thereon to move upward, and at the same time drives the impeller rotor to move upward, realizing the height adjustment of the impeller rotor and the preliminary pre-tightening of the belt. At this time, start the electric slide rail 6. The electric slide rail 6 drives the electric slider 7 and the lifting rod 8 thereon to move towards the impeller rotor, and at the same time drives the rotating disc 10 to move towards the impeller rotor, using the rotating disc 10 to limit the two end faces of the impeller rotor, realizing the secondary limiting clamping of the impeller rotor.

[0045] Please refer to Figure 2 and Figure 10 As shown in FIGS. and, the side clamping mechanism 3 includes a clamping assembly 31 and a pressing assembly 32. The pressing assembly 32 is arranged on the clamping assembly 31. The clamping assembly 31 includes a lead screw module 312 fixedly connected to the top of the support table 1. A bidirectional lead screw is rotatably connected inside the lead screw module 312, and a third servo motor 311 is fixedly installed in the middle of the front side of the lead screw module 312. The output end of the third servo motor 311 rotatably penetrates the front side of the lead screw module 312 and is fixedly connected to the front end of the bidirectional lead screw. Both ends of the bidirectional lead screw are respectively threadedly connected with a clamping arm 313 through a ball nut; the pressing assembly 32 includes a second side plate 328 fixedly connected to the clamping arm 313. On the side where the two second side plates 328 are close to each other, two connecting plates 315 are symmetrically fixedly installed on the left and right. On the side of the connecting plate 315 close to the center of the lead screw module 312, an arc-shaped clamping plate 314 for laterally clamping the impeller rotor is fixedly installed, and the two arc-shaped clamping plates 314 on the same side limit and prevent the belt from slipping, and a number of steel balls are evenly and rotatably installed on the side of the arc-shaped clamping plate 314 close to the impeller rotor.

[0046] Please refer to Figure 2 and Figure 10, a second spring telescopic rod 327 slidably penetrates through the centers of both second side plates 328. On the side where the two second spring telescopic rods 327 are close to each other, a second mounting bracket 326 is fixedly connected. A second pressing wheel 325 for pressing the belt is rotatably mounted on the second mounting bracket 326. At the top of the rear second side plate 328, an L-shaped rod 321 is provided. A first spring telescopic rod 322 slidably penetrates through the top of the horizontal section of the L-shaped rod 321. At the bottom of the first spring telescopic rod 322, a first mounting bracket 323 is fixedly installed. A first pressing wheel 324 is rotatably connected to the bottom of the first mounting bracket 323.

[0047] After the belt is initially pre-tightened, the third servo motor 311 is started at this time. The output end of the third servo motor 311 drives the bidirectional lead screw to rotate, synchronously driving the clamping arms 313 and the second side plates 328 thereon to move towards each other, and at the same time driving the arc-shaped clamping plates 314 to clamp in the middle, realizing radial limit clamping of the impeller rotor, realizing three-stage limit clamping of the impeller rotor, and clamping the belt between two adjacent arc-shaped clamping plates 314 on the same side, realizing axial limit of the belt, reducing the axial slip of the belt during high-speed rotation, reducing the interference to the dynamic balance test, and improving the accuracy of the test. When the second side plate 328 moves towards the impeller rotor, it synchronously drives the second spring telescopic rod 327 and the second mounting bracket 326 thereon to move towards the impeller rotor, and at the same time drives the second pressing wheel 325 to move towards the impeller rotor, using the second pressing wheel 325 to perform radial pressing on the belt. At the same time, the first pressing wheel 324 performs radial pressing on the top of the belt. The first pressing wheel 324 and the two second pressing wheels 325 are distributed in a triangle, further improving the stability of the belt and avoiding the problem of belt slipping during rotation.

[0048] When the lateral clamping mechanism 3 is stably clamped, rotate the rotary handle on the fixed shaft 231 at this time, synchronously drive the threaded rod 232 to rotate, and then drive the moving block 235 and the connecting frame 234 thereon to move forward simultaneously, and synchronously drive the limit slider 28 and the mounting shaft 29 thereon to move forward, and then synchronously drive the moving pulley 26 to move forward. When the moving pulley 26 moves forward, the tension of the belt is realized, and the tension degree of the belt is adjusted. At the same time, start the second servo motor 221, the output end of the second servo motor 221 drives the conical friction cylinder 222 to rotate, synchronously drives the friction wheel 244 and the mounting cylinder 246 thereon to rotate, and at the same time drives the driving bevel gear 243 and the driven bevel gear 242 to rotate, synchronously drives the mounting shaft 29 and the moving pulley 26 thereon to rotate, and then drives the belt to rotate, so that the rotation of the impeller rotor is realized through the belt. When rotating the rotary handle on the fixed shaft 231, synchronously drive the moving block 235 and the fork 245 thereon to move forward, and then drive the mounting cylinder 246 and the friction wheel 244 thereon to move forward, and then adjust the contact position between the friction wheel 244 and the conical friction cylinder 222. The conical friction cylinder 222 is conical, and the cross-sectional area of the conical friction cylinder 222 becomes larger from back to front. Then when the friction wheel 244 moves from back to front, the rotation speed of the friction wheel 244 becomes faster and faster, and the speed adjustment of the friction wheel 244 is realized, and the speed adjustment of the belt and the impeller rotor is indirectly realized. When the speed is increased, the moving pulley 26 moves forward synchronously, so as to increase the tension of the belt, and the self-adaptive adjustment of the belt tension is realized synchronously during speed adjustment, without separate adjustment, which saves time and effort and improves the test speed.

[0049] It should be noted that for this magnetic levitation fan impeller dynamic balance test device, during use, first loosen the buckle between the insertion rod 447 and the first fixed seat 443. At this time, turn the inverted U-shaped frame 444 around the position of the hinge shaft to open the inverted U-shaped frame 444, that is, expose the supporting roller 43. Then, pass the belt around the fixed pulley 25 and the moving pulley 26. Subsequently, use a crane to hoist the impeller rotor to be tested to the top of the device, put the belt on the middle part of the impeller rotor, lower the crane, and place the bottom ends of both ends of the impeller rotor between the two supporting rollers 43. Use the supporting rollers 43 to support and limit the impeller rotor. At this time, loosen the locking handle on the limiting cylinder 442, lower the movable rod 441, and synchronously drive the third pressing wheel 446 to descend until the bottom of the third pressing wheel 446 fits against the top of both ends of the impeller rotor. Then lock the handle to achieve the limit fixation of both ends of the impeller rotor, realizing the primary clamping of the impeller rotor. Then, use the rotating disk 10 to limit the two end faces of the impeller rotor, realizing the secondary limiting clamping of the impeller rotor. Then, through the lateral clamping mechanism 3, the impeller rotor is radially fixed and clamped, realizing the tertiary clamping of the impeller rotor. The clamping stability is good, and the lateral clamping mechanism 3 is used to axially limit the belt and perform a triangular pressing in the radial direction, avoiding the occurrence of belt slipping and reducing the error during testing. Then, use the speed regulating mechanism 2 to adjust the speed of the impeller rotor, facilitating the testing of the dynamic balance performance of the impeller rotor at different speeds, and synchronously adjusting the belt tension during speed regulation. During measurement, start the second servo motor 221, and the second servo motor 221 indirectly drives the impeller rotor to rotate. At this time, adjust the dynamic balance measuring instrument 11, align the dynamic balance measuring instrument 11 with the impeller blade position of the impeller rotor, and use the laser excitation method to collect the vibration signal of the impeller blade. The vibration signal is transmitted to the processor, the vibration signal is analyzed to determine the unbalanced position and magnitude, and then the data is transmitted to the display for display. Based on this information, add or remove weights at the corresponding angular positions to achieve a balanced state, realizing the dynamic balance test of the impeller rotor.

[0050] The above embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A dynamic balance test device for a magnetic levitation fan impeller, comprising a support table (1), characterized in that: A speed regulating mechanism (2) is arranged on the top of the support table (1), and a lateral clamping mechanism (3) is arranged on the left side of the top of the support table (1). A second end fixing mechanism (13) is fixedly connected to the right side of the top of the support table (1), and a first end fixing mechanism (4) is slidably arranged on the left side of the top of the support table (1); A column is arranged on the right front side of the support table (1), and a mounting rod (12) is hinged to the top of the column. A dynamic balance measuring instrument (11) is arranged on the mounting rod (12); The lateral clamping mechanism (3) includes a clamping component (31) and a pressing component (32). The pressing component (32) is arranged on the clamping component (31). The clamping component (31) includes a lead screw module (312) fixedly connected to the top of the support table (1). A bidirectional lead screw is rotatably connected inside the lead screw module (312), and a third servo motor (311) is installed on the front side of the lead screw module (312). The output end of the third servo motor (311) rotatably penetrates through the front side of the lead screw module (312) and is fixedly connected to the front end of the bidirectional lead screw. Clamping arms (313) are respectively threadedly connected to both ends of the bidirectional lead screw; The pressing component (32) includes second side plates (328) fixedly connected to the clamping arms (313). Two connecting plates (315) are fixedly installed on each of the two second side plates (328). An arc-shaped clamping plate (314) is fixedly installed on the side of the connecting plate (315) close to the center of the lead screw module (312), and the two arc-shaped clamping plates (314) on the same side limit and prevent slipping of the belt.

2. The dynamic balance test device for the impeller of a magnetic levitation blower according to claim 1, characterized in that: A limiting groove (15) is opened on the left side of the top of the support table (1). A unidirectional lead screw (16) is rotatably connected inside the limiting groove (15). A movable block (14) is threadedly connected to the unidirectional lead screw (16) through a ball nut. The movable block (14) is slidably connected inside the limiting groove (15). The top of the movable block (14) is fixedly connected to the bottom of the first end fixing mechanism (4). A first servo motor (5) is fixedly installed at the center of the left side of the support table (1), and the output end of the first servo motor (5) is fixedly connected to the left end of the unidirectional lead screw (16).

3. The dynamic balance test device for the impeller of a magnetic levitation blower according to claim 2, wherein: The first end fixing mechanism (4) and the second end fixing mechanism (13) have the same structure. The first end fixing mechanism (4) includes a lifting component (41), a lifting plate (42), a supporting roller (43), and a pressing component (44). The lifting plate (42) is arranged on the lifting component (41). The pressing component (44) is arranged on the lifting plate (42). The lifting component (41) includes a fixed base (411) fixedly installed on the top of the movable block (14). A hydraulic cylinder (412) is fixedly installed at the center inside the fixed base (411). The top of the output end of the hydraulic cylinder (412) is fixedly installed with a lifting plate (42). Guide rods (413) are slidably penetrated through the front and rear sides of the fixed base (411). The tops of the two guide rods (413) are fixedly connected to the bottom of the lifting plate (42). Two supporting rollers (43) for supporting the end of the impeller rotor are rotatably connected to the top of the lifting plate (42).

4. A dynamic balance testing device for a magnetic levitation blower impeller according to claim 3, characterized in that: The crimping assembly (44) includes a second fixed seat (445) fixedly installed on the front side of the top of the lifting plate (42). A reverse U-shaped frame (444) is hinged to the top of the second fixed seat (445). A limiting cylinder (442) is fixedly installed on the top of the reverse U-shaped frame (444). An active rod (441) is slidably connected inside the limiting cylinder (442). A third crimping wheel (446) is rotatably connected to the bottom of the active rod (441). A locking handle for crimping and locking the active rod (441) is fixedly installed outside the limiting cylinder (442). A plugging rod (447) is fixedly installed at one end of the reverse U-shaped frame (444) away from the second fixed seat (445). A first fixed seat (443) is slidably sleeved outside the plugging rod (447). The first fixed seat (443) is fixedly installed on the rear side of the top of the lifting plate (42).

5. The dynamic balance test device for the impeller of a magnetic levitation blower according to claim 1, wherein: A second spring telescopic rod (327) slidably penetrates through the centers of the two second side plates (328). Second mounting frames (326) are fixedly connected to the sides of the two second spring telescopic rods (327) close to each other. A second crimping wheel (325) for crimping the belt is rotatably installed on the second mounting frame (326). An L-shaped rod (321) is arranged at the top of the rear second side plate (328). A first spring telescopic rod (322) slidably penetrates through the top of the horizontal section of the L-shaped rod (321). A first mounting frame (323) is fixedly installed at the bottom of the first spring telescopic rod (322). A first crimping wheel (324) is rotatably connected to the bottom of the first mounting frame (323).

6. The dynamic balance test device for the impeller of a magnetic levitation blower according to claim 1, characterized in that: Electric slide rails (6) are fixedly installed on both the left and right sides of the support table (1). Electric sliders (7) are slidably connected to the tops of the two electric slide rails (6). A lifting rod (8) is fixedly connected to the top of the electric slider (7). A fixed rod (9) is fixedly installed at the top of the lifting rod (8). A rotating disc (10) for limiting the end face of the impeller rotor is rotatably connected to the side of the fixed rod (9) close to the support table (1).

7. A dynamic balance test device for a magnetic levitation fan impeller according to claim 1, characterized in that: The speed regulating mechanism (2) includes a fixing plate (21) fixedly connected to the top of the support table (1). A driving component (22), a speed regulating component (23), and a tensioning component (24) are arranged on the fixing plate (21). The speed regulating component (23) is arranged below the driving component (22). The tensioning component (24) is arranged on the speed regulating component (23). A plurality of fixed belt pulleys (25) are rotatably installed on the left side of the fixing plate (21). A chute (27) is formed on the fixing plate (21). A limiting slider (28) is slidably connected inside the chute (27). A mounting shaft (29) rotatably penetrates through the middle of the limiting slider (28). A moving belt pulley (26) is fixedly sleeved on the left end of the mounting shaft (29). A belt is commonly sleeved outside the plurality of fixed belt pulleys (25) and the moving belt pulley (26). The top of the belt is sleeved outside the impeller rotor.

8. A dynamic balance test device for a magnetic levitation fan impeller according to claim 7, characterized in that: The driving component (22) includes a second servo motor (221) fixedly installed on the right side of the fixing plate (21). A conical friction cylinder (222) is fixedly installed at the output end of the second servo motor (221).

9. A dynamic balance testing device for a magnetic levitation blower impeller according to claim 8, characterized in that: The speed regulation component (23) includes two first side plates (233) fixedly installed on the right side of the fixed plate (21). A fixed shaft (231) rotatably penetrates through the right side between the two first side plates (233). The front end of the fixed shaft (231) is fixedly connected to a rotating handle. A threaded rod (232) is fixedly sleeved in the middle of the fixed shaft (231). A moving block (235) is threadedly connected to the middle of the threaded rod (232). A connecting frame (234) is fixedly installed at the bottom of the moving block (235). One end of the connecting frame (234) away from the moving block (235) is connected to the limit slider (28).

10. A dynamic balance test device for a magnetic levitation blower impeller according to claim 9, characterized in that: The tensioning component (24) includes a rotating shaft (241) rotatably connected to the left side between the two first side plates (233). An installation cylinder (246) is slidably sleeved in the middle of the rotating shaft (241). A friction wheel (244) is fixedly sleeved outside the installation cylinder (246). The top outside the friction wheel (244) is in contact with the bottom outside the conical friction cylinder (222). Two fork-shaped levers (245) are fixedly installed on the left side of the moving block (235). The fork-shaped levers (245) are rotatably sleeved outside the installation cylinder (246). A driving bevel gear (243) is fixedly installed at the front end of the installation cylinder (246). A driven bevel gear (242) meshing with the driving bevel gear (243) is fixedly sleeved at the right end of the installation shaft (29).

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