Turbocharger dynamic balance correcting device

Abstract

The utility model belongs to the technical field of dynamic balance correction of turbochargers, and particularly relates to a dynamic balance correction device of a turbocharger, which comprises an operating platform, a detection assembly and a correction assembly, the detection assembly comprises an eddy current sensor and a laser sensor, the correction assembly comprises a guide plate, a sliding groove is formed in the guide plate, a sliding block is assembled in the sliding groove, and the guide plate is connected with the operating platform. A mounting block is mounted on the sliding block, an IPG optical fiber laser and a three-dimensional scanning camera are mounted on the mounting block, a variable frequency motor in the turbocharger is controlled by the PLC to operate, a rotor is accelerated to a rated rotating speed, and the eddy current sensor and the laser sensor simultaneously send monitoring signals to the PLC, provide key phases and lock unbalanced angles. The data fusion improves the precision of the full rotation speed section; the three-dimensional scanning camera monitors the laser de-weighting process in real time, the IPG optical fiber laser emits laser beams to the unbalanced position of the hub or the impeller, micron-sized material removal is achieved, and the accuracy and precision of balance correction can be improved.

Description

Technical Field

[0001] This utility model relates to the field of turbocharger dynamic balancing correction technology, specifically a turbocharger dynamic balancing correction device. Background Technology

[0002] A turbocharger is a device that uses the energy of exhaust gases from an engine to drive a turbine to rotate, thereby compressing the intake air and increasing the amount of air entering the engine. In order to ensure that the vibration of the rotor inside the turbocharger is controlled within the allowable range when rotating at high speed, a dynamic balancing device is needed to correct the rotor.

[0003] The turbocharger dynamic balancing correction device includes initial imbalance detection. By rotating the rotor, vibration sensors collect amplitude and phase signals in the X / Y directions. The system establishes a rotor dynamic model using the influence coefficient method, calculates the magnitude and angular position of the initial imbalance, and, based on the calculation results, places the drill bit at a designated position on the rotor to avoid affecting structural strength. The system repeats the operation and measures residual vibration until the balance level specified by the standard is reached.

[0004] Existing balancing devices may experience elastic deformation of the rotor at high speeds during the balancing process of turbocharger rotors, leading to low-speed balancing failure. Furthermore, the use of a single-structure vibration sensor to detect amplitude results in low accuracy of balancing and affects the accuracy of the balancing process. Therefore, a turbocharger dynamic balancing device is proposed to address the above problems. Utility Model Content

[0005] In order to overcome the shortcomings of the existing technology and solve the problems existing in the existing technology, this utility model proposes a turbocharger dynamic balancing correction device.

[0006] The technical solution adopted by this utility model to solve its technical problem is a turbocharger dynamic balancing correction device, including a workbench, on which a PLC controller is installed. A moving component is installed on the workbench, and a mounting plate is connected to the moving component. A detection component and a correction component are installed on the mounting plate. The detection component includes an eddy current sensor and a laser sensor, which are fixedly mounted on the mounting plate and connected to the PLC controller via internal circuitry. The correction component includes a guide plate with a groove inside. A first stepper motor is mounted on the side wall of the guide plate via a base. A first lead screw is mounted on the output shaft of the first stepper motor and rotatably mounted on the inner wall of the groove. A slider is assembled in the groove, and a mounting block is mounted on the slider. An IPG fiber laser and a 3D scanning camera are mounted on the mounting block. The laser and 3D scanning camera are connected to the PLC controller via internal circuitry. A slot is provided on the worktable, housing a turbocharger. A variable frequency motor is installed inside the turbocharger, with a rotor mounted on its output shaft. A hub is mounted on the rotor, and multiple impellers are mounted on the hub. The variable frequency motor is connected to the PLC controller via wires. Eddy current sensors and laser sensors correspond to the hub and impeller positions, respectively. The PLC controller controls the operation of the variable frequency motor inside the turbocharger, accelerating the rotor to its rated speed. The eddy current sensors and laser sensors simultaneously send monitoring signals to the PLC controller, providing key phase, locking the imbalance angle, and data fusion improves accuracy across the entire speed range. The 3D scanning camera monitors the laser de-weighting process in real time. The IPG fiber laser emits a laser beam towards the imbalance position of the hub or impeller, achieving micron-level material removal, which helps improve the accuracy and precision of balance correction.

[0007] Preferably, the moving component includes a fixed plate, which is fixedly mounted on the workbench. A moving slot is formed within the fixed plate. A second stepper motor is mounted on the side wall of the fixed plate via a base. The second and first stepper motors are connected to a PLC controller via an internal circuit. A second lead screw is mounted on the output shaft of the second stepper motor. The second lead screw is rotatably mounted on the inner wall of the moving slot. A moving block is assembled within the moving slot, and a moving frame is mounted on the moving block. The moving frame is fixedly connected to the mounting plate and accurately and stably locked in the slot by a turbocharger. At this time, the hub and impeller on the rotor are in a balanced state. Then, the mounting plate drives the detection and calibration components to be positioned directly above the turbocharger, enabling rapid and convenient alignment of the hub and impeller by the eddy current sensor, laser sensor, IPG fiber laser, and 3D scanning camera, thus improving the ease of positioning.

[0008] The advantages of this utility model are:

[0009] 1. This utility model controls the operation of the variable frequency motor inside the turbocharger through a PLC controller. The rotor is accelerated to the rated speed. The eddy current sensor and the laser sensor simultaneously send monitoring signals to the PLC controller, providing key phase, locking the unbalance angle, and the data fusion improves the accuracy across the entire speed range. The three-dimensional scanning camera monitors the laser deweighting process in real time. The IPG fiber laser emits a laser beam to the unbalanced position of the hub or impeller to achieve micron-level material removal, which is beneficial to improving the accuracy and precision of balance correction.

[0010] 2. This utility model accurately and stably locks the turbocharger into the slot, at which point the hub and impeller on the rotor are in a balanced state. Then, the mounting plate drives the detection and correction components to be positioned directly above the turbocharger, realizing the rapid and convenient alignment of the eddy current sensor, laser sensor, IPG fiber laser and three-dimensional scanning camera with the hub and impeller, which is beneficial to improving the convenience of positioning. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a first-person perspective 3D structural diagram;

[0013] Figure 2 This is a schematic diagram of the three-dimensional structure of the mounting plate;

[0014] Figure 3 This is a schematic diagram of the three-dimensional structure of the guide plate;

[0015] Figure 4 This is a schematic diagram of the three-dimensional structure of a turbocharger;

[0016] Figure 5 This is a schematic diagram of the three-dimensional structure of the fixed plate.

[0017] In the diagram: 1. Workbench; 2. PLC controller; 3. Mounting plate; 301. Eddy current sensor; 302. Laser sensor; 4. Guide plate; 401. Slide groove; 402. First stepper motor; 403. First lead screw; 404. Slider; 405. Mounting block; 406. IPG fiber laser; 407. 3D scanning camera; 5. Slot; 501. Turbocharger; 502. Hub; 503. Impeller; 6. Fixed plate; 601. Moving slot; 602. Second stepper motor; 603. Second lead screw; 604. Moving block; 605. Moving frame. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0019] Please see Figure 1-4As shown, a turbocharger dynamic balancing device includes a workbench 1, a PLC controller 2 mounted on the workbench 1, a moving component mounted on the workbench 1, a mounting plate 3 connected to the moving component, and a detection component and a calibration component mounted on the mounting plate 3. The detection component includes an eddy current sensor 301 and a laser sensor 302, which are fixedly mounted on the mounting plate 3 and connected to the PLC controller 2 via internal circuitry. The calibration component includes a guide... Plate 4, guide plate 4 has a slide groove 401. A first stepper motor 402 is mounted on the side wall of guide plate 4 via a base. A first lead screw 403 is mounted on the output shaft of the first stepper motor 402. The first lead screw 403 is rotatably mounted on the inner wall of slide groove 401. A slider 404 is assembled in slide groove 401. A mounting block 405 is mounted on slider 404. An IPG fiber laser 406 and a 3D scanning camera 407 are mounted on mounting block 405. The IPG fiber laser 406 and the 3D scanning camera 407 are connected to the PLC via internal circuitry. The PLC controller 2 is connected. A slot 5 is provided on the workbench 1, containing a turbocharger 501. A variable frequency motor is installed inside the turbocharger 501, with a rotor mounted on the output shaft. A hub 502 is mounted on the rotor, and multiple impellers 503 are mounted on the hub 502. The variable frequency motor is connected to the PLC controller 2 via wires. An eddy current sensor 301 and a laser sensor 302 correspond to the positions of the hub 502 and impellers 503, respectively. During operation, the existing balancing device adjusts the rotor of the turbocharger 501. During the balancing process, the rotor may undergo elastic deformation at high speed, causing low-speed balancing failure. Because a single-structure vibration sensor is used to detect the amplitude, the accuracy of the balancing is low, affecting the accuracy of the balancing. By placing the turbocharger 501 in the slot 5, the structure of the slot 5 is adapted to the structure of the turbocharger 501. This structure can only perform balancing on one type of turbocharger 501. The turbocharger 501 is accurately and stably locked in the slot 5. At this time, the hub 502 and impeller 503 on the rotor are in a balanced state.

[0020] Since the rotor is located inside the turbocharger 501, while the hub 502 and impeller 503 are located on the surface of the turbocharger 501, the rotor can be balanced by monitoring and adjusting the hub 502.

[0021] After the turbocharger 501 is positioned, the mounting plate 3 moves the detection and correction components to a position directly above the turbocharger 501 via the operation of the moving components. At this time, the eddy current sensor 301 is aligned with the hub 502, the laser sensor 302 is aligned with the impeller 503, and the IPG fiber laser 406 and the 3D scanning camera 407 are movable components that can move above the hub 502 and the impeller 503. This is achieved by the operation of the first stepper motor 402, which drives the first lead screw 403 to rotate. The first lead screw 403 drives the slider 404 on it to move horizontally back and forth. The slider 404 drives the mounting block 405 to move horizontally back and forth. The mounting block 405 drives the IPG fiber laser 406 and the 3D scanning camera 407 to move horizontally back and forth.

[0022] When performing balance testing on the rotor of turbocharger 501, the variable frequency motor inside turbocharger 501 is controlled by PLC controller 2. The variable frequency motor drives the rotor to the working speed, and then the rotor is accelerated to the rated speed to avoid low-speed balance failure. At this time, the eddy current sensor 301 is a Bently Nevada 3300. The eddy current sensor 301 monitors the vibration of hub 502 in real time, that is, monitors the radial vibration displacement of the rotor.

[0023] The laser sensor 302 is model Micro-Epsilon optoNCDT, and the laser sensor 302 is triggered by the reflective mark of the impeller 503.

[0024] Eddy current sensor 301 and laser sensor 302 simultaneously send monitoring signals to PLC controller 2. The internal system of PLC controller 2 establishes a rotor dynamics model using the influence coefficient method to calculate the magnitude and angular position of the initial imbalance. This structure, through the cooperation of eddy current sensor 301 and laser sensor 302, provides a key phase, locks the imbalance angle, and data fusion improves the accuracy across the entire speed range.

[0025] During the rotor balancing process, a Keyence VL-800 series 3D scanning camera 407 monitors the laser weight removal process in real time to prevent misoperation, such as weight removal position deviation or over-cutting. During this process, the 3D scanning camera 407 performs visual-assisted positioning, process monitoring, and quality inspection. During the balancing process, based on calculation results, when the IPG fiber laser 406 and the 3D scanning camera 407 move horizontally to the unbalanced position, and the unbalanced position rotates to the point where the IPG fiber laser 406 is directly below, the PLC controller 2 controls the IPG fiber laser 406 to operate. The IPG fiber laser 406 emits a laser beam towards the unbalanced position of the hub 502 or impeller 503, achieving micron-level material removal through laser ablation. This method achieves a weight removal accuracy of ±0.01g and is three times faster than mechanical drilling. Through this structure, the turbocharger dynamic balancing device can significantly improve accuracy, efficiency, and reliability, which is beneficial for improving the accuracy and precision of the balancing process.

[0026] Please see Figure 5 As shown, the moving component includes a fixed plate 6, which is fixedly installed on the workbench 1. A moving groove 601 is provided inside the fixed plate 6. A second stepper motor 602 is mounted on the side wall of the fixed plate 6 via a base. The second stepper motor 602 and the first stepper motor 402 are connected to the PLC controller 2 via an internal circuit. A second lead screw 603 is mounted on the output shaft of the second stepper motor 602. The second lead screw 603 is rotatably mounted on the inner wall of the moving groove 601. A moving block 604 is assembled inside the moving groove 601, and a moving frame 605 is mounted on the moving block 604. The moving frame 605 is fixedly connected to the mounting plate 3. During operation, the existing balancing correction device has difficulty in conveniently positioning the device during the balancing correction of the rotor of the turbocharger 501, resulting in poor positioning convenience. By placing the turbocharger 501 in the slot 5, the turbocharger 501 is accurately and stably positioned. The rotor is secured in slot 5, at which point the hub 502 and impeller 503 on the rotor are in a balanced state. Then, the second stepper motor 602 operates, driving the second lead screw 603 to rotate. The second lead screw 603 drives the moving block 604 to move horizontally, the moving block 604 drives the moving frame 605 to move horizontally, and the moving frame 605 drives the mounting plate 3 to move horizontally. The mounting plate 3 drives the detection component and the correction component to be positioned directly above the turbocharger 501. At this time, the eddy current sensor 301 is aligned with the hub 502, the laser sensor 302 is aligned with the impeller 503, and the IPG fiber laser 406 and the 3D scanning camera 407 are above the hub 502 and the impeller 503. This enables the eddy current sensor 301, the laser sensor 302, the IPG fiber laser 406, and the 3D scanning camera 407 to quickly and conveniently align the hub 502 and the impeller 503, which is beneficial to improving the convenience of positioning.

[0027] Working principle: Existing balancing devices struggle with convenient positioning during the balancing process of the turbocharger 501 rotor. By placing the turbocharger 501 into the slot 5, it is accurately and stably secured. At this point, the rotor hub 502 and impeller 503 are balanced. Then, the second stepper motor 602 rotates the second lead screw 603, which in turn moves the moving block 604 horizontally. The moving block 604 moves the moving frame 605 horizontally, which in turn moves the mounting plate 3 horizontally. The mounting plate 3 then positions the detection and balancing components on the turbocharger 501. Directly above 01, the eddy current sensor 301 is aligned with the hub 502, the laser sensor 302 is aligned with the impeller 503, and the IPG fiber laser 406 and 3D scanning camera 407 are above the hub 502 and impeller 503. This enables the eddy current sensor 301, laser sensor 302, IPG fiber laser 406, and 3D scanning camera 407 to quickly and easily align the hub 502 and impeller 503, which improves the ease of positioning. In existing balance correction devices, during the balance correction of the rotor of the turbocharger 501, the rotor may undergo elastic deformation at high speeds, leading to low-speed balance failure. Because a single-structure vibration sensor is used to monitor vibration... The traditional method of testing the entire rotor's length leads to lower accuracy in balance correction, affecting the accuracy of the correction. By placing the turbocharger 501 in the slot 5, whose structure is compatible with the turbocharger 501, and which can only perform balance correction on one type of turbocharger 501, the turbocharger 501 is accurately and stably secured in the slot 5. At this point, the hub 502 and impeller 503 on the rotor are in a balanced state. Since the rotor is located inside the turbocharger 501, while the hub 502 and impeller 503 are located on the surface of the turbocharger 501, balance correction of the rotor can be achieved by monitoring and correcting the hub 502. After the turbocharger 501 is positioned, it is moved... When the components are in operation, the mounting plate 3 moves the detection and calibration components directly above the turbocharger 501. At this time, the eddy current sensor 301 is aligned with the hub 502, the laser sensor 302 is aligned with the impeller 503, and the IPG fiber laser 406 and the 3D scanning camera 407 are movable parts that can move above the hub 502 and the impeller 503. This is achieved by the operation of the first stepper motor 402, which drives the first lead screw 403 to rotate. The first lead screw 403 drives the slider 404 on it to move horizontally back and forth. The slider 404 drives the mounting block 405 to move horizontally back and forth. The mounting block 405 drives the IPG fiber laser 406 and the 3D scanning camera 407 to move horizontally back and forth.During the balancing test of the turbocharger 501 rotor, the PLC controller 2 controls the operation of the variable frequency motor inside the turbocharger 501. The variable frequency motor drives the rotor to the operating speed, and then the rotor is accelerated to the rated speed. At this time, the eddy current sensor 301 (model Bently Nevada 3300) monitors the vibration of the hub 502 in real time, that is, it monitors the radial vibration displacement of the rotor. The laser sensor 302 (model Micro-Epsilon optoNCDT) triggers pulses through the reflective mark on the impeller 503. The eddy current sensor 301 and the laser sensor 302 simultaneously send monitoring signals to the PLC controller 2. The internal system of the PLC controller 2 establishes a rotor dynamics model using the influence coefficient method to calculate the magnitude and angular position of the initial imbalance. This structure, through the cooperation of the eddy current sensor 301 and the laser sensor 302, provides a key phase, locks the imbalance angle, and the data fusion improves the accuracy across the entire speed range. During the rotor balancing correction process, the 3D scanning camera 407 (model Basler ace) is used. The acA2000-165um 3D scanning camera 407 monitors the laser de-weighting process in real time to prevent misoperation, such as de-weighting position misalignment or over-cutting. During this process, the 3D scanning camera 407 performs visual-assisted positioning, process monitoring, and quality inspection. During correction, when the IPG fiber laser 406 and the 3D scanning camera 407 move horizontally to the unbalanced position, and the unbalanced position rotates to the point where the IPG fiber laser 406 is directly below, the PLC controller 2 controls the IPG fiber laser 406 to operate. The IPG fiber laser 406 emits a laser beam towards the unbalanced position of the hub 502 or impeller 503, achieving micron-level material removal through laser ablation. This method achieves a de-weighting accuracy of ±0.01g and is three times faster than mechanical drilling. Through this structure, the turbocharger dynamic balancing correction device can significantly improve accuracy, efficiency, and reliability, which is beneficial for improving the accuracy and precision of balancing correction.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A turbocharger dynamic balancing correction device, characterized in that: The system includes a workbench (1), on which a PLC controller (2) is installed, and a moving component is installed on the workbench (1). A mounting plate (3) is connected to the moving component, and a detection component and a calibration component are installed on the mounting plate (3). The detection component includes an eddy current sensor (301) and a laser sensor (302), which are fixedly mounted on a mounting plate (3). The eddy current sensor (301) and the laser sensor (302) are connected to a PLC controller (2) through an internal circuit. The calibration component includes a guide plate (4), which has a groove (401) inside. A first stepper motor (402) is mounted on the side wall of the guide plate (4) via a base. A first lead screw (403) is installed on the output shaft of (402). The first lead screw (403) is rotatably mounted on the inner wall of the slide groove (401). A slider (404) is assembled in the slide groove (401). An mounting block (405) is installed on the slider (404). An IPG fiber laser (406) and a three-dimensional scanning camera (407) are installed on the mounting block (405). The IPG fiber laser (406) and the three-dimensional scanning camera (407) are connected to the PLC controller (2) through internal circuits.

2. The turbocharger dynamic balancing correction device according to claim 1, characterized in that: The workbench (1) is provided with a slot (5), in which a turbocharger (501) is placed. A variable frequency motor is installed inside the turbocharger (501). A rotor is installed on the output shaft of the variable frequency motor. A hub (502) is installed on the rotor. Multiple impellers (503) are installed on the hub (502). The variable frequency motor is connected to the PLC controller (2) through wires.

3. The turbocharger dynamic balancing correction device according to claim 1, characterized in that: The eddy current sensor (301) and the laser sensor (302) correspond to the positions of the hub (502) and the impeller (503), respectively.

4. The turbocharger dynamic balancing correction device according to claim 1, characterized in that: The moving component includes a fixed plate (6), which is fixedly installed on the workbench (1), and a moving groove (601) is provided in the fixed plate (6).

5. The turbocharger dynamic balancing correction device according to claim 4, characterized in that: A second stepper motor (602) is mounted on the side wall of the fixed plate (6) via a base. The second stepper motor (602) and the first stepper motor (402) are connected to the PLC controller (2) via an internal circuit. A second lead screw (603) is mounted on the output shaft of the second stepper motor (602). The second lead screw (603) is rotatably mounted on the inner wall of the slot moving groove (601).

6. The turbocharger dynamic balancing correction device according to claim 4, characterized in that: The movable slot (601) is equipped with a movable block (604), and a movable frame (605) is installed on the movable block (604). The movable frame (605) is fixedly connected to the mounting plate (3).

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