An EC motor rotor dynamic balance laser correction device

Abstract

This invention discloses a laser-based dynamic balancing device for an EC motor rotor, belonging to the field of laser cutting technology. It includes a frame module, a chuck module, and a balancing module. Two sets of chuck modules are mounted on the frame module to clamp the rotor from both ends of the rotor shaft. The balancing module is movably mounted on one side of the frame module. Each chuck module includes a hollow shaft cylinder and a shaft disc. The shaft disc is rotatably mounted at one end of the hollow shaft cylinder. Several support layers are slidably mounted on the shaft disc along the circumferential direction. Clamps are mounted on the inner diameter ends of the support layers. This invention uses the two sets of chuck modules in the frame module to center and clamp both ends of the EC motor rotor shaft, preventing rotor misalignment. A heat insulation layer is provided between the support layers and the clamps to block heat. The high thermal conductivity copper alloy clamps, combined with the coolant flow channel, efficiently exchange heat, maintaining the shaft at a low temperature and reducing magnet demagnetization.

Description

Technical Field

[0001] This invention belongs to the field of laser cutting technology, specifically relating to a laser correction device for dynamic balancing of EC motor rotors. Background Technology

[0002] The EC motor rotor dynamic balancing laser correction device is a structure that solves the vibration and noise problems caused by uneven mass distribution in EC motor rotors through precise detection and quantitative removal.

[0003] Existing dynamic balancing correction devices have low centering accuracy in the clamping structure, which easily leads to rotor misalignment and affects the correction basis. At the same time, they lack an efficient temperature control mechanism. When adjusting the mass distribution by laser ablation of silicon steel sheets, the heat from laser ablation is easily conducted to the rotor magnets, causing demagnetization. This makes the chuck prone to thermal shock and reduces measurement accuracy. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide an EC motor rotor dynamic balancing laser correction device to solve the problems mentioned in the background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A laser correction device for dynamic balancing of an EC motor rotor includes a frame module, a clamp module, and a correction module. The frame module is equipped with two sets of clamp modules for clamping the rotor from both ends of the shaft of the EC motor. The correction module is movably arranged on one side of the frame module. The chuck module includes a hollow shaft assembly and a chuck assembly. The hollow shaft assembly includes a hollow shaft cylinder and a shaft disc. The hollow shaft cylinder is a hollow tube. One end of the hollow shaft cylinder is mounted on the frame module, and the other end of the hollow shaft cylinder is rotatably mounted on the shaft disc. The chuck assembly includes a support layer and a clamp. Several support layers are arranged in an array along the circumferential direction and are slidably mounted on the shaft disk. The clamp is provided at the inner diameter end of the support layer.

[0006] As a further embodiment of the present invention, the frame module includes a machine base and a slide assembly. The slide assembly includes a slide base plate, a slide guide rail, a slide, a shaft bracket, and a motor bracket. Two sets of slide base plates are linearly arranged on the machine base. The slide base plate is equipped with a slide guide rail. One end of the slide is slidably mounted on the slide guide rail, and the other end of the slide is fixedly equipped with a shaft bracket and a motor bracket. A drive motor is also mounted on the motor bracket.

[0007] As a further embodiment of the present invention, the hollow shaft assembly further includes an angle bracket, a front rotary sealing groove, a front sealing ring, hydraulic conduits, a hydraulic actuator, and a hydraulic guide pipe. The angle bracket is fixedly mounted on the shaft disc along the circumferential direction. The front rotary sealing groove is located at the outer diameter end of the hollow shaft cylinder, and a hydraulic guide pipe is also provided at the end side of the hollow shaft cylinder. The hydraulic guide pipe is connected to the inner cavity of the front rotary sealing groove. The front sealing ring is rotatably sealed and mounted on the front rotary sealing groove, and several hydraulic conduits are connected to the front sealing ring. The hydraulic actuator is fixedly mounted on the angle bracket, with one end of the hydraulic actuator connected to the hydraulic conduits, and the movable shaft at the other end of the hydraulic actuator fixedly connected to the support layer.

[0008] As a further embodiment of the present invention, the clamp assembly further includes a heat insulation layer, and a plurality of such heat insulation layers are stacked and arranged between the support layer and the clamp.

[0009] As a further embodiment of the present invention, the clamp assembly further includes a drainage pipe, a drain pipe, convex rings, and a spiral flow channel. The drainage pipe and the drain pipe are also fixedly assembled on the support layer. The drainage pipe and the drain pipe pass through the support layer, the clamp, and the heat insulation layer, and the ends of the drainage pipe and the drain pipe are arranged in the inner cavity of the clamp. The inner diameter end of the clamp is also provided with a plurality of convex rings, which are spaced apart in a linear direction. The inner cavity of the clamp is also provided with a spiral flow channel, which divides the inner cavity of the clamp into two interconnected chambers. The drainage pipe and the drain pipe are respectively connected to the two chambers.

[0010] As a further embodiment of the present invention, the clamp module further includes a flow guiding component, which includes a rear rotary sealing groove, an inlet pipe, a drain pipe, and a rear sealing ring. The rear rotary sealing groove is fixedly sleeved on the outer surface of the hollow shaft cylinder. The rear rotary sealing groove has two independent cavities. One end of the rear rotary sealing groove is connected to the inlet pipe and the drain pipe. The inlet pipe and the drain pipe are respectively connected to the two independent cavities. The rear sealing ring is rotary sealed and assembled on the rear rotary sealing groove. The rear sealing ring is also equipped with several supply pipe ports and return pipe ports. The supply pipe ports and return pipe ports are respectively connected to the two cavities, and the other ends of the supply pipe ports and return pipe ports are respectively connected to the drainage pipe and the drain pipe.

[0011] As a further embodiment of the present invention, the correction module includes an ablation component, which includes a robotic arm guide rail, a robotic arm platform, a robotic arm, and a laser light source. The robotic arm guide rail is fixedly mounted on the machine platform, the robotic arm platform is slidably mounted on the robotic arm guide rail, the bottom of the robotic arm is fixedly mounted on the robotic arm platform, and a laser light source is assembled at the end of the movable arm of the robotic arm.

[0012] In summary, the embodiments of the present invention have the following beneficial effects compared with the prior art: The two sets of chuck modules on the frame module of the device can precisely clamp both ends of the EC motor rotor shaft. The hollow shaft assembly of the chuck module, together with the circumferential array of support layers and grippers, synchronously extends and retracts radially under hydraulic drive to achieve self-centering clamping of the shaft. At the same time, the cooperation between the angle bracket and the limiting groove ensures that the support layer slides smoothly, avoids rotor displacement during clamping, and prevents displacement during dynamic balancing. Furthermore, the heat insulation layer between the support layer and the clamp in the chuck assembly can block heat conduction, slow down the temperature rise of the rotor shaft, and prevent the magnet from being demagnetized at high temperature. The clamp is made of high thermal conductivity copper alloy, and together with the drain pipe, drain pipe and spiral flow channel, it can achieve efficient heat exchange of coolant. The convex ring structure reduces contact thermal resistance, avoids thermal shock, and ensures that the rotor shaft remains at a low temperature and stable during the calibration process, so as to avoid heat affecting the measurement accuracy. Furthermore, the gas guide shell of the laser light source of the ablation component forms a conical air curtain to prevent molten material from splashing and smoke from deflecting the laser. The outer gas guide layer draws out smoke and harmful gases, which not only protects the magnets and the environment, but also improves the cleanliness of the ablation surface. In conjunction with the drive motor, it drives the rotor to rotate stably, precisely adjusts the rotor mass, and improves the dynamic balance effect. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of one embodiment of the present invention.

[0014] Figure 2 This is a schematic diagram of the ablation component in one embodiment of the present invention.

[0015] Figure 3 This is a schematic diagram of the slide assembly in one embodiment of the present invention.

[0016] Figure 4 This is a partial structural schematic diagram of a hollow shaft assembly in one embodiment of the present invention.

[0017] Figure 5 This is a partial cross-sectional view of one embodiment of the present invention.

[0018] Figure 6 for Figure 5 Enlarged schematic diagram of reference numeral A in the attached figure.

[0019] Figure 7 for Figure 5 Enlarged schematic diagram of reference numeral B in the attached figure.

[0020] Figure label: 1-Machine; 2-Slide assembly, 201-Slide base plate, 202-Slide guide rail, 203-Slide, 204-Shaft bracket, 205-Motor bracket, 206-Drive motor; 3-Hollow shaft assembly, 301-Hollow shaft cylinder, 302-Shaft disc, 303-Angle bracket, 304-Front rotary seal groove, 305-Front seal ring, 306-Hydraulic conduit, 307-Hydraulic unit, 308-Hydraulic guide pipe, 309-Connecting arm; 4-Clamping assembly, 401-Support layer, 402-Clamper, 403-Insulation layer, 404-Drainage pipe, 405-Drainage pipe, 406-Protruding ring, 407-Spiral flow channel, 408-Connecting part; 5-Flow guiding assembly, 501-Rear rotary sealing groove, 502-Inlet pipe, 503-Drain pipe, 504-Rear sealing ring, 505-Supply port, 506-Return port; 6-Ablation component, 601-Robot arm guide rail, 602-Robot arm table, 603-Robot arm, 604-Laser source. Detailed Implementation

[0021] To more clearly illustrate the structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Please see Figures 1-7 According to one embodiment of the present invention, an EC motor rotor dynamic balancing laser correction device has a first direction x, a second direction y, and a third direction z. The EC motor rotor dynamic balancing laser correction device includes a frame module, a clamp module, and a correction module. Two sets of clamp modules are arranged on the frame module for clamping the rotor from both ends of the EC motor rotor shaft. The correction module is movably arranged on one side of the frame module. The clamp module includes a hollow shaft assembly. The components are 3 and 4. The hollow shaft assembly 3 includes a hollow shaft cylinder 301 and a shaft disk 302. The hollow shaft cylinder 301 is a hollow tube. One end of the hollow shaft cylinder 301 is mounted on the frame module, and the other end of the hollow shaft cylinder 301 is rotatably mounted on the shaft disk 302. The chuck assembly 4 includes a support layer 401 and a clamp 402. A plurality of the support layers 401 are arranged in an array along the circumferential direction and are slidably mounted on the shaft disk 302. The inner diameter end of the support layer 401 is provided with a clamp 402.

[0023] In practical application, the main structure of this EC motor rotor dynamic balancing laser correction device consists of a frame module, a clamp module, and a correction module. The frame module has two sets of clamp modules linearly arranged along the x-axis. These two sets of clamp modules can move precisely along the x-axis under the drive of a servo motor (the specific model of the servo motor is not limited), thereby clamping the shaft of the motor rotor at both ends. A hollow shaft assembly 3 of the clamp module contains a hollow shaft cylinder 301. One end of the hollow shaft cylinder 301 is mounted on the frame module, and the hollow shaft cylinder 301 has an internally hollow structure. A shaft disk 302 is rotatably mounted on the end of the hollow shaft cylinder 301 facing the motor rotor shaft. The shaft disk 302 has several circumferentially arranged limiting grooves. The end of the support layer 401 is connected to a connecting... The connecting part 408 is slidably fitted in the limiting groove. The inner diameter end of the support layer 401 is provided with a clamp 402. Several clamps 402 are arranged in a circumferential array along the electronic rotor axis. Under hydraulic drive, several support layers 401 and clamps 402 move synchronously to one side of the shaft and press together to achieve self-centering clamping of the shaft. The other end of the shaft disk 302 is fixedly connected to the motor shaft of the drive motor 206. The drive motor 206 can drive the motor rotor shaft to be processed to rotate at a set speed in the driving state. The dynamic balance error of the rotor is measured with the help of the balance sensor. Then, the silicon steel sheet on one side of the rotor end face is ablated by the ablation component 6 to slightly adjust the mass of the rotor, thereby improving the dynamic balance.

[0024] Please see Figure 3 In a preferred embodiment of the present invention, the frame module includes a machine base 1 and a slide assembly 2. The slide assembly 2 includes a slide base plate 201, a slide guide rail 202, a slide 203, a shaft support 204, and a motor support 205. Two sets of slide base plates 201 are linearly arranged on the machine base 1. The slide base plate 201 is equipped with the slide guide rail 202. One end of the slide 203 is slidably mounted on the slide guide rail 202, and the other end of the slide 203 is fixedly equipped with the shaft support 204 and the motor support 205. The motor support 205 is also equipped with a drive motor 206.

[0025] In practical application, the two sets of slide base plates 201 are fixedly arranged at both ends of the machine base 1 along the x-axis. Slide guide rails 202 are arranged on the slide base plates 201 along the x-axis. The slide 203 is limited and slidably assembled on the slide guide rails 202. A shaft bracket 204 and a motor bracket 205 are also fixedly assembled on the slide 203. The shaft bracket 204 and the hollow shaft cylinder 301 are fixedly connected to each other so that the position of the hollow shaft cylinder 301 in the yoz plane is fixed. A drive motor 206 is fixedly installed on one side of the motor bracket 205. The shaft of the drive motor 206 passes through the hollow shaft cylinder 301 and is fixedly connected to the shaft disk 302, thereby driving the shaft disk 302 to rotate on a fixed axis.

[0026] Please see Figure 6 In a preferred embodiment of the present invention, the hollow shaft assembly 3 further includes a bracket 303, a front rotary sealing groove 304, a front sealing ring 305, a hydraulic conduit 306, a hydraulic actuator 307, and a hydraulic guide pipe 308. The bracket 303 is fixedly mounted on the shaft disc 302 along the circumferential direction.

[0027] In practical application, several of the aforementioned brackets 303 are fixedly assembled on the shaft disk 302, and the connecting part 408 is slidably assembled on the brackets 303, so that several support layers 401 can be radially extended and retracted to clamp the rotor shaft.

[0028] Furthermore, the front rotary sealing groove 304 is arranged at the outer diameter end of the hollow shaft cylinder 301, and a hydraulic guide pipe 308 is also provided at the end side of the hollow shaft cylinder 301. The hydraulic guide pipe 308 is connected to the inner cavity of the front rotary sealing groove 304. The front rotary sealing groove 304 is arranged at the outer diameter end of the hollow shaft cylinder 301. An annular cavity is provided in the front rotary sealing groove 304. A perforated pipe is also arranged in the pipe wall of the hollow shaft cylinder 301. One end of the perforated pipe is connected to the annular cavity, and the other end of the perforated pipe is connected to the hydraulic guide pipe 308. A hydraulic pump is connected to the end of the hydraulic guide pipe 308, which can pump oil into the annular cavity. The hydraulic guide pipe 308 is arranged at the end of the hollow shaft cylinder 301 to avoid mechanical interference with the guide assembly 5.

[0029] Furthermore, the front sealing ring 305 is rotatably sealed and mounted on the front rotary sealing groove 304, and several hydraulic conduits 306 are connected to the front sealing ring 305. The hydraulic actuator 307 is fixedly mounted on the bracket 303, with one end of the hydraulic actuator 307 connected to the hydraulic conduit 306, and the movable shaft at the other end of the hydraulic actuator 307 fixedly connected to the support layer 401. The front sealing ring 305 is rotatably sleeved on the front rotary sealing groove 304 via a rotary sealing valve, and several circumferentially arranged valves are also provided on the front sealing ring 305. The hydraulic conduit 306 is connected to the annular cavity inside the front rotary sealing groove 304. The other end of the hydraulic conduit 306 is connected to the hydraulic actuator 307. Since the hydraulic actuator 307 is fixedly installed on the corner bracket 303 and the movable shaft of the hydraulic actuator 307 is connected to the support layer 401, after the hydraulic oil is pumped into the hydraulic actuator 307 along the hydraulic conduit 306, the sliding of the support layer 401 and the connecting part 408 on one side of the shaft disk 302 can be controlled by the hydraulic pressure, thereby controlling the radial expansion and contraction of the support layer 401.

[0030] Please see Figure 7In a preferred embodiment of this embodiment, the clamp assembly 4 further includes a heat insulation layer 403, and a plurality of heat insulation layers 403 are stacked and arranged between the support layer 401 and the clamp 402.

[0031] In practical application, several heat insulation layers 403 are stacked between the support layer 401 and the clamp 402. The heat insulation layers 403 are used to prevent heat from being conducted from the inner clamp 402 to the outer support layer 401. Since the shaft of the motor rotor is thermally conductive, if the ends of the rotor shaft and the clamp module have high thermal conductivity during laser ablation of the silicon steel sheet, the heat on the surface of the silicon steel sheet will be quickly transferred to the rotor shaft and the clamp module, causing the heat to quickly approach the shaft. The magnet area of ​​the part further causes the magnet to heat up, which in turn leads to high-temperature demagnetization. The heat insulation layer 403 can prevent the heat from dissipating rapidly from the chuck module side, thereby slowing down the heating rate of the motor rotor shaft and keeping the motor rotor shaft at a low temperature close to room temperature during the ablation process. If there is no heat insulation layer 403, when the laser stops processing, the heat stored in the support layer 401 will be conducted back to the clamp 402 layer and then back to the rotor shaft, causing the shaft to continue to heat up after processing, affecting the subsequent measurement accuracy.

[0032] Furthermore, the heat insulation layer 403 is filled with low thermal conductivity materials such as ceramic fibers to form a thermal diode effect, that is, heat can only flow from the clamp 402 to the liquid cooling channel and cannot flow back from the support layer 401.

[0033] Furthermore, the clamp 402 is preferably made of a copper alloy with high thermal conductivity. The thermal conductivity of copper alloy is about 380 W / (m·K), which is 10-20 times that of steel. It can quickly diffuse the incoming heat to the entire clamp 402, avoid local overheating, and ensure that the heat is evenly transferred to the liquid cooling area. The support layer 401 is preferably made of stainless steel.

[0034] Please see Figure 7 In a preferred embodiment of the present invention, the clamp assembly 4 further includes a drainage pipe 404, a drain pipe 405, a convex ring 406, and a spiral flow channel 407. The drainage pipe 404 and the drain pipe 405 are also fixedly assembled on the support layer 401. The drainage pipe 404 and the drain pipe 405 pass through the support layer 401, the clamp 402, and the heat insulation layer 403, and the ends of the drainage pipe 404 and the drain pipe 405 are arranged in the inner cavity of the clamp 402.

[0035] In practical application, the drain pipe 404 and the outlet pipe 405 are used to deliver coolant to and output coolant into the inner cavity of the clamp 402, respectively. After the coolant is pumped into the inner cavity of the clamp 402 along the drain pipe 404, since the inner diameter of the clamp 402 is in contact with the motor rotor shaft, and the clamp 402 is made of a copper alloy with high thermal conductivity, the heat is evenly distributed on the clamp 402. By pumping coolant into the inner cavity of the clamp 402, the coolant can fully exchange heat with the clamp 402, thereby allowing the heat absorbed by the clamp 402 to be quickly released to the outside, except for thermal radiation.

[0036] Furthermore, the inner diameter end of the clamp 402 is also provided with a plurality of protruding rings 406. The protruding rings 406 are spaced apart along a linear direction. The protruding rings 406 at the inner diameter end of the clamp 402 are stacked ring-shaped protrusions. Compared with normal surface contact, this structure changes surface contact to line contact, which greatly reduces the contact area, increases the contact thermal resistance, and limits the rate at which heat flows into the chuck module. If the chuck module and the rotor shaft are in surface contact, a large amount of heat will rush into the chuck module instantly, causing the surface temperature of the chuck module to rise sharply and form a thermal shock.

[0037] Furthermore, a spiral flow channel 407 is also provided in the inner cavity of the clamp 402. The spiral flow channel 407 divides the inner cavity of the clamp 402 into two interconnected chambers. The drain pipe 404 and the outlet pipe 405 connect the two chambers respectively. On the one hand, the spiral flow channel 407 makes the liquid cooling channel fit tightly against the outer wall of the clamp 402, shortening the heat conduction path. On the other hand, the spiral structure increases the contact area between the coolant and the wall surface and the flow turbulence, improving the heat exchange efficiency and ensuring that the inner layer temperature of the clamp module is constant.

[0038] Please see Figure 6 In a preferred embodiment of the present invention, the clamp module further includes a flow guiding component 5, which includes a rear rotary sealing groove 501, an inlet pipe 502, a drain pipe 503, and a rear sealing ring 504. The rear rotary sealing groove 501 is fixedly sleeved on the outer surface of the hollow shaft cylinder 301. The rear rotary sealing groove 501 has two independent cavities. One end of the rear rotary sealing groove 501 is connected to the inlet pipe 502 and the drain pipe 503. The inlet pipe 502 and the outlet pipe 503 are respectively connected to two sets of independent cavities. The rear sealing ring 504 is rotary sealed and assembled on the rear rotary sealing groove 501. The rear sealing ring 504 is also equipped with several supply pipe ports 505 and return pipe ports 506. The supply pipe ports 505 and return pipe ports 506 are respectively connected to the two sets of cavities, and the other end of the supply pipe ports 505 and return pipe ports 506 are respectively connected to the drainage pipe 404 and the outlet pipe 405.

[0039] In practical application, the rear rotary sealing groove 501 is fixedly sleeved on the surface of the hollow shaft cylinder 301, and the rear rotary sealing groove 501 has two sets of independent annular cavities. The two sets of cavities are respectively connected to the drain pipe 404 and the drain pipe 405 through the liquid supply port 505 and the return port 506. One end of the two sets of cavities is also provided with a liquid inlet pipe 502 and a liquid outlet pipe 503 for controlling the pumping flow of coolant. The rear sealing ring 504 is fixedly connected to the shaft disk 302 and the front sealing ring 305 through the connecting arm 309 so that they rotate synchronously.

[0040] Please see Figure 2 In a preferred embodiment of the present invention, the correction module includes an ablation component 6, which includes a robotic arm guide rail 601, a robotic arm platform 602, a robotic arm 603, and a laser source 604. The robotic arm guide rail 601 is fixedly mounted on the machine base 1, the robotic arm platform 602 is slidably mounted on the robotic arm guide rail 601, the bottom of the robotic arm 603 is fixedly mounted on the robotic arm platform 602, and the end of the movable arm of the robotic arm 603 is equipped with a laser source 604.

[0041] In practical application, the robotic arm guide rail 601 is fixedly mounted on the machine base 1, the robotic arm platform 602 is slidably mounted on the robotic arm guide rail 601, the bottom of the robotic arm 603 is fixedly mounted on the robotic arm platform 602, and the end of the movable arm of the robotic arm 603 is equipped with a laser light source 604.

[0042] Furthermore, the laser source 604 is fitted with a conical gas-guiding shell. An inner gas-guiding layer is provided inside the shell to eject gas outwards, and an outer gas-guiding layer is provided outside the shell to draw in gas. The two gas-guiding layers are isolated from each other so that during laser ablation, the gas ejected from the inner gas-guiding layer can form a conical air curtain at some points on the laser beam. This air curtain prevents molten material from splashing and ablating the magnet, and also blows away the smoke and dust generated during ablation, preventing the smoke and dust from deflecting the laser beam, improving the surface cleanliness of the ablation surface, and increasing the heat conduction of the silicon steel sheet surface, thus reducing the heating rate of the magnet. On the other hand, the outer gas-guiding layer can draw in smoke and dust, preventing the smoke and dust from scattering, and adsorbing gases such as ozone generated in the molten pool, avoiding environmental pollution.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A laser correction device for dynamic balancing of an EC motor rotor, characterized in that, include: The frame module, the chuck module, and the calibration module are provided. The frame module is equipped with two sets of chuck modules for clamping the rotor from both ends of the shaft of the EC motor. The calibration module is movably arranged on one side of the frame module. The chuck module includes a hollow shaft assembly and a chuck assembly. The hollow shaft assembly includes a hollow shaft cylinder and a shaft disc. The hollow shaft cylinder is a hollow tube. One end of the hollow shaft cylinder is mounted on the frame module, and the other end of the hollow shaft cylinder is rotatably mounted on the shaft disc. The chuck assembly includes a support layer and a clamp. Several support layers are arranged in an array along the circumferential direction and are slidably mounted on the shaft disk. The clamp is provided at the inner diameter end of the support layer.

2. The laser correction device for dynamic balancing of an EC motor rotor according to claim 1, characterized in that, The frame module includes a machine base and a slide assembly. The slide assembly includes a slide base plate, a slide guide rail, a slide, a shaft bracket, and a motor bracket. Two sets of slide base plates are linearly arranged on the machine base. The slide base plate is equipped with a slide guide rail. One end of the slide is slidably mounted on the slide guide rail, and the other end of the slide is fixedly equipped with a shaft bracket and a motor bracket. The motor bracket is also equipped with a drive motor.

3. The laser correction device for dynamic balancing of an EC motor rotor according to claim 1, characterized in that, The hollow shaft assembly also includes a corner bracket, a front rotary sealing groove, a front sealing ring, a hydraulic conduit, a hydraulic actuator, and a hydraulic guide pipe. The corner bracket is fixedly assembled on the shaft disc along the circumferential direction. The front rotary sealing groove is arranged at the outer diameter end of the hollow shaft cylinder, and a hydraulic guide pipe is also provided at the end side of the hollow shaft cylinder. The hydraulic guide pipe is connected to the inner cavity of the front rotary sealing groove. The front sealing ring is rotatably sealed and assembled on the front rotating sealing groove, and several hydraulic conduits are connected to the front sealing ring. The hydraulic device is fixedly assembled on the corner bracket, one end of the hydraulic device is connected to the hydraulic conduits, and the movable shaft at the other end of the hydraulic device is fixedly connected to the support layer.

4. The laser correction device for dynamic balancing of an EC motor rotor according to claim 1, characterized in that, The clamp assembly also includes a heat insulation layer, and several heat insulation layers are stacked between the support layer and the clamp.

5. The laser correction device for dynamic balancing of an EC motor rotor according to claim 1, characterized in that, The clamp assembly also includes a drain pipe, a drain pipe, a convex ring, and a spiral flow channel. The drain pipe and the drain pipe are also fixedly assembled on the support layer. The drain pipe and the drain pipe pass through the support layer, the clamp, and the heat insulation layer, and the ends of the drain pipe and the drain pipe are arranged in the inner cavity of the clamp. The inner diameter end of the clamp is also provided with a number of protruding rings, which are spaced apart along a linear direction. The inner cavity of the clamp is also provided with a spiral flow channel, which divides the inner cavity of the clamp into two interconnected chambers. The drainage pipe and the drain pipe are respectively connected to the two chambers.

6. The laser correction device for dynamic balancing of an EC motor rotor according to claim 5, characterized in that, The clamp module also includes a flow guiding component, which includes a rear rotary sealing groove, an inlet pipe, a drain pipe, and a rear sealing ring. The rear rotary sealing groove is fixedly sleeved on the outer surface of the hollow shaft cylinder. The rear rotary sealing groove is divided into two independent cavities. One end of the rear rotary sealing groove is connected to the inlet pipe and the drain pipe. The inlet pipe and the drain pipe are respectively connected to the two independent cavities. The rear sealing ring is rotary sealed and assembled on the rear rotary sealing groove. The rear sealing ring is also equipped with several liquid supply ports and return ports. The liquid supply ports and return ports are respectively connected to two sets of cavities, and the other ends of the liquid supply ports and return ports are respectively connected to the drainage pipe and the drain pipe.

7. The laser correction device for dynamic balancing of an EC motor rotor according to claim 1, characterized in that, The correction module includes an ablation component, which includes a robotic arm guide rail, a robotic arm platform, a robotic arm, and a laser light source. The robotic arm guide rail is fixedly mounted on the machine platform, the robotic arm platform is slidably mounted on the robotic arm guide rail, the bottom of the robotic arm is fixedly mounted on the robotic arm platform, and a laser light source is assembled at the end of the movable arm of the robotic arm.

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