An intelligent high-speed rotor dynamic balance detection device and method

Abstract

The present invention belongs to the technical field of high-speed rotor dynamic balancing, and discloses an intelligent high-speed rotor dynamic balancing detection device and method. The cascade installation between the main shaft variable frequency drive motor and the elastic shaft variable frequency drive motor means that the rotor of the former motor is connected to the stator of the latter motor through a shaft, and the rotor of the latter motor outputs a mechanical torque, so that the shaft speed of the latter motor is the sum of the rotor speeds of the two motors, thereby obtaining a higher shaft speed. The main shaft variable frequency drive motor and the main shaft follower servo motor are electrically connected by a torque amplifying self-synchronous machine, which means that under the control of a microcomputer signal, the speed and angle of the follower servo motor are kept strictly consistent with the main drive motor, so as to achieve synchronization of speed and angle under non-rigid connection conditions. The elastic shaft variable frequency drive motor and the follower detection barrel servo motor are also electrically connected by a torque amplifying self-synchronous machine to keep the speed and angle of rotation between the two synchronized under the control of a microcomputer.

Description

Technical Field

[0001] The invention belongs to the technical field of high-speed rotor dynamic balancing, and in particular relates to an intelligent high-speed rotor dynamic balancing detection device and method. Background Art

[0002] At present, with the development of science and technology, the demand for high-speed motors in the manufacturing industry is increasing, such as high-speed centrifuges for bioengineering, high-speed electric dental drills for medical equipment, spindle motors and high-speed drilling machines for machine tool industry, high-speed centrifugal pumps, high-speed camera guns, high-speed infrared scanners for aviation and aerospace, "flywheel batteries" and high-speed motors for laser technology, etc. High-speed motors usually refer to motors with speeds exceeding 10,000 r / min, and their manufacturing precision requirements are very high. However, due to the unevenness of the manufacturing material structure and the existence of dimensional errors, the dynamic balance of the high-speed running rotor is insufficient, which often causes the motor to vibrate violently, make strong noises, and even burn out the bearings due to severe friction, so the rotor needs to be dynamically balanced.

[0003] The rotor speed of traditional AC asynchronous motors is lower than 3000r / min, and the solution to dynamic balancing is relatively simple, which can be solved by the following methods: 1. Use axisymmetric design as much as possible; 2. For motors with higher dynamic balancing requirements, dynamic balancing detection can be performed on the fan impeller rigidly connected to the rotor by bench work, and the dynamic balancing of the rotor can be achieved by adding and subtracting mass loads; 3. For high-speed motors or high-speed rotating bodies with higher dynamic balancing requirements, special dynamic balancing trimming is required for the motor rotor or rotating body.

[0004] Existing technical solutions:

[0005] 1. Gravity rotor dynamic balance detection, such as engine crankshaft dynamic balance detection and balancing on the bench platform; high-speed motor rotor dynamic balance detection and balancing. The dynamic balance detection and balancing process is completed by the bench worker's manual operation.

[0006] 2. The detection of centrifugal rotor dynamic balance, such as the hand-cranked centrifugal rotor balancing device, does not require a benchwork platform, but requires plumb fixation, and relies on centrifugal force to mark the position of adding or subtracting mass loads. The detection and balancing process is still completed by manual operation of the benchworker.

[0007] 3. Currently, most high-speed motor rotor dynamic balancing technologies use balancing machines.

[0008] Disadvantages of the existing technology:

[0009] For the existing technical solutions 1 and 2, both adopt the traditional low-speed motor rotor balancing method to balance the high-speed motor rotor, and its disadvantages are obvious: first, the balancing time is long, which requires more than ten days or even several months; second, the balancing accuracy is low, and it is difficult to meet the required balancing requirements; third, after balancing, the high-speed rotor often needs to be repeatedly installed and tested for dynamic balancing effect, and rework is required if it does not meet the standards until the dynamic balancing requirements are met at a certain speed. The dynamic balancing efficiency is very low.

[0010] For the prior art solution 3, there are the following disadvantages:

[0011] Under the condition that the balancing precision is very high, some parts of the balancing machine system have a great influence on the balancing effect. Due to the complexity of the actual situation, the adaptability of the balancing method of the existing balancing machine system is still not wide enough. For rotor systems with special shapes or special requirements, the balancing work relies more on experience than technology. The balancing time is long, and the balancing speed range often cannot meet customer requirements, and the imbalance problem cannot be fundamentally solved.

[0012] Modern variable frequency high-speed AC asynchronous motors can reach a maximum rotating magnetic field speed of 600,000 r / min because the AC power supply frequency can reach 10 kHz; if a high-speed dual-rotor AC asynchronous motor is used, the speed of the high-speed rotor can theoretically reach 400,000 r / min when the power supply frequency is 10 kHz and a three-pair magnetic pole structure is used. This high-speed rotor places higher demands on dynamic balancing, and neither the traditional balancing method nor the balancing machine can meet its balancing requirements. In theory, many scholars have applied a variety of effective methods to rotor dynamic balancing, such as the method of obtaining the influence coefficient matrix of the rotor without applying a test weight to the rotor when balancing the flexible rotor, that is, the modal balancing method without test weight. This method can determine the modal vibration function of the rotor using the known modal shape and mass of the rotor, and use this principle to develop a test system that does not require a test weight to estimate the correction amount required for rotor balancing. Deng Wangqun et al. successfully achieved the dynamic balancing of the rotor of a micro-turbine engine with a maximum speed of 120,000 r / min using a balancing clamp, and extended this technology to the dynamic balancing of all slender shaft flexible rotors. At present, relevant scholars have integrated various methods into one, fully improved and innovated the balancing methods, and brought into play the advantages of various algorithms. In the current information age, the rotor dynamic balancing algorithm is digitized, intelligentized and implemented using software programming, which improves the automation level of the rotor. It should be pointed out that although the above research has achieved great results, the essence of its research is still limited to the rotor itself. The mass load is added or subtracted on the rotor, and the balancing accuracy is ultimately subject to the balancing machine. More research focuses on various matching algorithms. Based on various literature and materials, the maximum speed of the motor used in the study of rotor dynamic balancing is 120,000 r / min. No research on the dynamic balancing of high-speed rotors with a speed of one million has been found, and the use of a balancing disc for high-speed rotor dynamic balancing technology has not been mentioned in various literature and materials.

[0013] In summary, the problems existing in the prior art are:

[0014] (1) The balancing time is long, which may take more than ten days or even several months; the balancing accuracy is low, and it is difficult to achieve the required balancing requirements; third, after balancing, the high-speed rotor often needs to be repeatedly installed and tested for dynamic balancing effect. If it does not meet the standard, it will be reworked until the dynamic balancing requirements are achieved at a certain speed. The dynamic balancing efficiency is very low.

[0015] (2) Under the condition that the balancing precision is very high, some parts of the balancing machine system have a great influence on the balancing effect. Due to the complexity of the actual situation, the adaptability of the balancing method of the existing balancing machine system is still not wide enough. For rotor systems with special shapes or special requirements, the balancing work relies more on experience than technology. The balancing time is long, and the balancing speed range often cannot meet customer requirements, and the imbalance problem cannot be fundamentally solved.

[0016] (3) Modern variable frequency high-speed AC asynchronous motors, because the AC power frequency can reach 10kHz, the maximum rotating magnetic field speed can reach 600,000r / min; if a high-speed dual-rotor AC asynchronous motor is used, the speed of the high-speed rotor can theoretically reach 400,000r / min when the power frequency is 10kHz and a three-pair magnetic pole structure is used. This high-speed rotor places higher requirements on dynamic balancing, and neither the traditional balancing method nor the balancing machine can meet its balancing requirements.

[0017] The difficulty of solving the above problems and defects is as follows: This invention is a scientific research project officially approved by the National Natural Science Foundation. The task requires that under the premise of 400,000 r / min of the rotor, the balancing disk is rigidly connected to the rotor to be balanced coaxially to achieve automatic balancing of dynamic balancing. The dynamic balancing process of traditional fitters is improved by comprehensively applying microcomputers, sensors, power electronics, high-voltage pulse spraying and other technologies, and the balancing performance is required to far exceed the existing balancing machine. Thus, a complete set of high-speed rotor balancing control systems with automated balancing process, short balancing cycle, high efficiency and high precision are developed.

[0018] The significance of solving the above problems and defects is: ① It breaks through the traditional research direction, and the research results of the subject can fundamentally solve the imbalance problem; ② It promotes the comprehensive development of the discipline. In the process of mechanical dynamic balancing correction, microcomputers, sensors, power electronics, high-voltage pulse spraying and other technologies are introduced, and the balancing accuracy is high; ③ The balancing process is continuous, and the balancing effect can be observed online from low speed to high speed; ④ The balancing period is short and efficient, and the balancing time is an average of 2 to 3 hours. Summary of the invention

[0019] In view of the problems existing in the prior art, the present invention provides an intelligent high-speed rotor dynamic balance detection device and method.

[0020] The present invention is implemented as follows: an intelligent high-speed rotor dynamic balance detection device, the intelligent high-speed rotor dynamic balance detection device is provided with:

[0021] Spindle variable frequency drive motor, base detection barrel;

[0022] The main shaft variable frequency drive motor and the elastic shaft variable frequency drive motor are installed in tandem.

[0023] A microcomputer and a liquid crystal touch screen operation and display interface are installed outside the base detection barrel, and electrodes of signal transmission capacitors are installed inside the barrel;

[0024] A cylindrical high-speed bearing is installed between the inner edge of the upper end of the base detection barrel and the outer edge of the upper end of the follow-up detection barrel; a main shaft follow-up servo motor is fixed to the bottom of the base detection barrel by bolts, and the main shaft follow-up servo motor and the elastic shaft follow-up servo motor are also connected in series;

[0025] The upper part of the bottom of the follow-up detection barrel and the concentric top cone are connected by a non-rigid concentric shaft connection, and the upper end of the concentric top cone and the center hole of the shaft end of the motor to be balanced are in sliding hard contact;

[0026] A concentric rigid connection is adopted between the upper end of the rotor shaft to be balanced and the lower end of the balancing disk, a concentric rigid connection is adopted between the upper end of the balancing disk and the lower end of the elastic shaft, and a concentric rigid connection is achieved between the upper end of the elastic shaft and the elastic drive motor shaft through a three-claw fastener.

[0027] Furthermore, a plurality of plates of a direction-finding capacitor are bonded and fixed to the inner edge of the upper portion of the follow-up detection barrel, and a detection gap exists between the outer cylindrical surface of the balancing disk cylinder serving as a common electrode of the direction-finding capacitor and the plurality of direction-finding capacitor plates fixed on the inner edge of the detection barrel.

[0028] Furthermore, an annular capacitor plate is bonded and fixed between the inner side wall of the base detection barrel and the outer side wall of the follower detection barrel to form a signal transmission capacitor between the rotating body and the stationary body.

[0029] Furthermore, a plurality of direction-determining capacitor plates are fixedly attached to the inner edge of the upper end of the follow-up detection barrel and form a direction-determining capacitor together with the outer cylindrical surface of the balancing disk; the upper end of the elastic shaft is clamped on the center claw, and the center claw is arranged on the rotating shaft of the elastic shaft variable frequency drive motor; the elastic shaft variable frequency drive motor and the main shaft variable frequency drive motor at the upper end are installed in series with the shaft.

[0030] Another object of the present invention is to provide an intelligent high-speed rotor dynamic balancing detection method for operating the intelligent high-speed rotor dynamic balancing detection device, the intelligent high-speed rotor dynamic balancing detection method comprising: the detection circuit is composed of a directional capacitor, a ring capacitor, and a basic capacitor in series, the change in capacitance causes the voltage division value of the capacitor to the DC or AC voltage to change accordingly, the amplifier circuit amplifies the detected radial displacement information to the volt level required for digital circuit processing, and sends it to a microcomputer after digital-to-analog conversion; the computer application software analyzes and compares the data in each direction, determines the actual direction and displacement of the radial displacement, and provides accurate balancing data for subsequent quality balancing.

[0031] Furthermore, the intelligent high-speed rotor dynamic balancing detection method includes: a detection gap exists between the outer cylindrical surface of the balancing disk as the common electrode of the direction-detecting capacitor and a plurality of direction-detecting capacitor plates fixed on the inner edge of the detection barrel, the gap changes with the centrifugal force generated by the rotation of the balancing disk, the change of the gap between the capacitor plates is converted into an electrical signal through a detection bridge, and the detection signal is transmitted to a microcomputer through a transmission capacitor on the cylindrical surface of a follow-up detection barrel to control and identify the direction of action of the rotating centrifugal force.

[0032] In summary, the advantages and positive effects of the present invention are as follows: the intelligent high-speed rotor dynamic balancing detection and balancing technology is a comprehensive application of microcomputers and high-speed dynamic balancing detection equipment, sensors, power electronics, high-voltage pulse spraying and other technologies, to improve the traditional benchwork dynamic balancing process, and develop a complete set of high-speed rotor balancing control systems that make the balancing process automated, short-cycle, efficient and high-precision. Intelligent high-speed rotor dynamic balancing detection is one of the detection links. Intelligent high-speed rotor dynamic balancing detection can give full play to the excellent performance of modern high technology during use, making the detection and balancing process and the operating interface humanized, simple and easy to use, and the balancing effect can be observed online, without the need for repeated installation to test the dynamic balancing effect.

[0033] The present invention can be popularized in all fields of dynamic balancing and trimming. As long as it is an axial rotating body, it can be trimmed, and the trimming time is reduced to 2-3 hours or one shift. Once the system is successfully developed, its price can be more than 300,000. The intelligent rotating body dynamic balancing detection and trimming system solves the long cycle and uncertainty of dynamic balancing and trimming, and has a huge market at home and abroad. Research on the theory and implementation technology of dynamic balancing has been continuously conducted at home and abroad. The first balancing machine has a history of more than 100 years. With the advancement of science and technology, there are many balancing methods. In principle, it is mainly divided into soft-bearing balancing machine and hard-bearing balancing machine. Because the hard-bearing balancing machine has many advantages, such as measuring the unbalanced centrifugal force of the rotor, it can realize "permanent calibration", simple operation, etc., it has been more and more widely used. From the development trend, in addition to the balancing of high-speed and small rotors, the hard-bearing balancing machine will replace the soft-bearing balancing machine. The invention proposes a high-speed rotor continuous balancing control system developed by using a balancing disk with the comprehensive application of microcomputers, sensors, power electronics, high-voltage pulse spraying and other technologies under the premise of a rotor speed of 400,000 r / min. It has high precision and short balancing cycle, and is the first of its kind at home and abroad. The invention can give full play to the excellent performance of modern high technology during use, making the detection and balancing process and the operating interface humanized, simple and easy to use, and easy to operate. The balancing effect can be observed online, and there is no need to repeatedly install the machine to check the dynamic balancing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a structural schematic diagram of an intelligent high-speed rotor dynamic balance detection device provided by an embodiment of the present invention;

[0035] Figure 2 It is a schematic diagram of the structure of the central fastening claw and the elastic shaft provided in an embodiment of the present invention;

[0036] Figure 3 It is a schematic diagram of the structure of a trim plate, a follow-up detection channel, a base detection barrel and a direction-finding capacitor plate provided in an embodiment of the present invention;

[0037] In the figure: 1. Spindle variable frequency drive motor; 2. Active shaft; 3. Elastic shaft variable frequency drive motor; 4. Central fastening claw; 5. Elastic shaft; 6. Mass balancing disk; 7. Follow-up detection barrel; 8. Base detection barrel; 9. Cylindrical high-speed bearing; 10. Ring transmission capacitor plate; 11. Directional capacitor plate; 12. Motor rotor to be balanced; 13. Concentric top cone; 14. Elastic shaft follow-up servo motor; 15. Spindle follow-up servo motor; 16. Single-chip microcomputer; 17. Analog-to-digital conversion; 18. Programmable amplifier. DETAILED DESCRIPTION

[0038] In order to further understand the content, features and effects of the present invention, the following embodiments are given as examples and described in detail with reference to the accompanying drawings.

[0039] The structure of the present invention is described in detail below in conjunction with the accompanying drawings.

[0040] like Figure 1-Figure 2 As shown, the intelligent high-speed rotor dynamic balancing detection device provided by the present invention includes: a main shaft variable frequency drive motor 1, a driving shaft 2, an elastic shaft variable frequency drive motor 3, a central fastening claw 4, an elastic shaft 5, a mass balancing disk 6, a follow-up detection barrel 7, a base detection barrel 8, a cylindrical high-speed bearing 9, an annular transmission capacitor plate 10, a direction-identifying capacitor plate 11, a motor rotor to be balanced 12, a concentric top cone 13, an elastic shaft follow-up servo motor 14, a main shaft follow-up servo motor 15, a single-chip microcomputer 16, an analog-to-digital conversion 17, and a programmable amplifier 18.

[0041] The main shaft variable frequency drive motor 1 and the elastic shaft variable frequency drive motor 3 are installed in tandem; a microcomputer and a liquid crystal touch screen operation and display interface are installed outside the base detection barrel 8, and electrodes of a signal transmission capacitor are installed inside the base detection barrel 8;

[0042] A cylindrical high-speed bearing 9 is installed between the inner edge of the upper end of the base detection barrel 8 and the outer edge of the upper end of the follow-up detection barrel 7; a main shaft follow-up servo motor 15 is fixed to the bottom of the base detection barrel 8 by bolts, and the main shaft follow-up servo motor 15 and the elastic shaft follow-up servo motor 14 are also connected in series with the shaft.

[0043] The upper part of the bottom of the follow-up detection barrel 7 is connected to the concentric top cone 13 by a non-rigid connection, and the upper end of the concentric top cone 13 is in sliding hard contact with the center hole of the shaft end of the motor rotor 12 to be balanced;

[0044] A concentric rigid connection (such as a spline shaft) is adopted between the upper end of the rotor 12 to be balanced and the lower end of the balancing disk, a concentric rigid connection is adopted between the upper end of the balancing disk and the lower end of the elastic shaft 5, and a concentric rigid connection is achieved between the upper end of the elastic shaft 5 and the elastic drive motor shaft through a three-claw fastener.

[0045] A plurality of direction-detecting capacitor plates 11 are bonded and fixed to the inner edge of the upper portion of the follow-up detection barrel 7. A detection gap exists between the cylindrical outer surface of the trim disk serving as a common electrode of the direction-detecting capacitor and the plurality of direction-detecting capacitor plates 11 fixed on the inner edge of the follow-up detection barrel 7. This gap changes with the centrifugal force of the rotation of the trim disk. The change in the gap between the direction-detecting capacitor plates 11 is converted into an electrical signal through a detection bridge. Since the trim disk and the follow-up detection barrel 7 rotate synchronously, the detection signal is relatively stable. The detection signal is transmitted to the microcomputer through the cylindrical transmission capacitor of the follow-up detection barrel 7 to control and identify the direction of action of the rotating centrifugal force, thereby providing an accurate basis for subsequent quality balancing.

[0046] An annular transmission capacitor plate 10 is bonded and fixed to the inner side wall of the base detection barrel 8 and the outer side wall of the follow-up detection barrel 7 .

[0047] A plurality of directional capacitor plates 11 are glued and fixed to the inner edge of the upper end of the follow-up detection barrel 7, and there is a detection gap with the outer cylindrical surface of the balancing disk. This gap will change with the centrifugal force offset of the balancing disk. The upper end of the elastic shaft 5 is clamped on the central fastening claw 4, and the central fastening claw 4 is arranged on the elastic shaft variable frequency drive motor shaft. The elastic shaft variable frequency drive motor 3 and the main shaft variable frequency drive motor shaft are installed in series.

[0048] The main shaft follow-up servo motor and the elastic shaft follow-up servo motor 14 are also installed in tandem.

[0049] The spindle variable frequency drive motor 1 and the lower spindle follower servo motor 15 are electrically connected by a torque amplifying self-synchronous machine; the upper elastic shaft variable frequency drive motor 3 and the lower elastic shaft follower servo motor 14 are also electrically connected by a torque amplifying self-synchronous machine.

[0050] The structure of the present invention is further described below in conjunction with specific embodiments.

[0051] Example 1

[0052] The present invention comprehensively applies mechanical elastic shaft technology, capacitive sensing technology, and microcomputer control technology to the dynamic balance detection technology of rotating bodies. The capacitive sensing technology applies concepts such as directional capacitor (position-changing capacitor), annular capacitor (slip capacitor), and basic capacitor. The radial elastic displacement change of the concentric top cone 11 in high-speed motion is perfectly converted into the high and low voltage change of the basic capacitor terminal, and the voltage is led out and transmitted to a stationary workbench, which provides feasibility for subsequent signal processing.

[0053] Example 2

[0054] The follow-up detection channel 5 rotates synchronously with the high-speed rotating body. It is the carrier of the direction-detecting capacitor and the annular capacitor. It is also the intermediate carrier that converts the radial displacement in high-speed motion into an electrical signal and transmits it to the stationary stage, providing a basis for the direction-detecting capacitor to detect the direction and scale of the radial displacement change in a relatively static environment.

[0055] Example 3

[0056] The direction determination accuracy is proportional to the number of direction determination capacitor plates 7. The more direction determination capacitor plates 7 there are, the higher the direction determination accuracy is. In order to simplify the detection circuit structure, the number of direction determination capacitor plates 7 in the present invention is 8, and the software subdivision technology is used to double the direction determination accuracy. If a higher direction determination accuracy is required, the number of direction determination capacitor plates 7 can be increased, such as 16, 32, 64, etc.

[0057] The specific process of the intelligent dynamic balance detection method provided by the embodiment of the present invention is as follows:

[0058] like Figure 3 As shown, the specific model of the single-chip microcomputer 16 can be flexibly selected according to the requirements of the product performance indicators. In this embodiment, the single-chip microcomputer is 89S51, the analog-to-digital converter 17 is ADC0809, and the program-controlled amplifier 18AD526; the multiple signals from the direction identification information acquisition capacitor bridge, each of which corresponds to a program-controlled amplifier 18, the amplification amount of multiple program-controlled amplifiers 18 is set by the microcomputer program, and the output of each program-controlled amplifier 18 is connected to an analog input terminal of the analog-to-digital converter 17 chip. The 0809 chip has eight analog input terminals. A certain analog input terminal is selected for analog-to-digital conversion 17 through a three-bit binary digital control terminal. The control terminal selects each analog input terminal in turn. The direction identification signal is sent to the analog-to-digital converter 17 chip for digitization after program-controlled amplification. The single-chip microcomputer compares the digitized amount from the direction identification acquisition, selects the minimum amount, the maximum amount, and the adjacent amount, determines the actual offset direction of the current rotor according to the control algorithm, and lights up the corresponding light-emitting diode to indicate the actual offset direction of the current rotor.

[0059] Due to the non-uniformity of rotor mass distribution and manufacturing tolerance, the high-speed rotating body will inevitably generate radial centrifugal force during the rotation process, causing the elastic shaft to deform, and then causing the capacity of the directional capacitor in a certain direction of synchronous rotation to change. The detection circuit is composed of the directional capacitor, the annular capacitor, and the basic capacitor in series. The change in capacity causes the voltage divider value of the capacitor to change with the DC or AC voltage. The amplifier circuit amplifies the detected radial displacement information to the volt level required for digital circuit processing, and sends it to the microcomputer after digital-to-analog conversion; the computer application software analyzes and compares the data in each direction to determine the actual direction and displacement of the radial displacement, and provides balancing data for subsequent mass balancing.

[0060] The working principle of the present invention is:

[0061] In order to objectively and accurately detect the radial displacement in high-speed rotation, a follow-up detection barrel 7 that rotates synchronously with the rotating body is used. The follow-up detection barrel 7 and the concentric top cone 13 are non-rigidly connected, and the elastic shaft follow-up servo motor 14 realizes synchronous rotation with the concentric top cone 13. In use, synchronous or asynchronous rotation can be flexibly adopted according to application needs. The follow-up detection barrel 7 is also the carrier of the direction-identifying capacitor plate 11 and the annular capacitor plate 10. The rotating radial displacement voltage information is transmitted to the fixed basic capacitor through the annular capacitor with constant capacity, so that the amplification circuit receives and processes the information.

[0062] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are within the scope of the technical solution of the present invention.

Claims

1. An intelligent high-speed rotor dynamic balance detection device, characterized in that: The intelligent high-speed rotor dynamic balance detection device is provided with: Spindle variable frequency drive motor, base detection barrel; The main shaft variable frequency drive motor and the elastic shaft variable frequency drive motor are installed in tandem; A microcomputer and a liquid crystal touch screen operation and display interface are installed outside the base detection barrel, and electrodes of signal transmission capacitors are installed on the inner edge of the barrel; A cylindrical high-speed bearing is installed between the inner edge of the upper end of the base detection barrel and the outer edge of the upper end of the follow-up detection barrel; a main shaft follow-up servo motor is fixed to the bottom of the base detection barrel by bolts, and the main shaft follow-up servo motor and the elastic shaft follow-up servo motor are also connected in series with the shaft; The upper part of the bottom of the follow-up detection barrel and the concentric top cone are connected by a non-rigid concentric shaft connection, and the upper end of the concentric top cone and the center hole of the shaft end of the motor to be balanced are in sliding hard contact; The upper end of the rotor shaft to be balanced is connected to the lower end of the balance plate by a concentric rigid connection, the upper end of the balance plate is connected to the lower end of the elastic shaft by a concentric rigid connection, and the upper end of the elastic shaft is connected to the elastic drive motor shaft by a three-claw fastener by a concentric rigid connection; A plurality of polar plates of a direction-finding capacitor are bonded and fixed to the inner edge of the upper portion of the follow-up detection barrel, and a detection gap exists between the outer cylindrical surface of the trim plate cylinder as a common electrode of the direction-finding capacitor and the plurality of polar plates of the direction-finding capacitor fixed on the inner edge of the follow-up detection barrel; An annular capacitor plate is bonded and fixed between the inner side wall of the base detection barrel and the outer side wall of the follower detection barrel to form a signal transmission capacitor between the rotating body and the stationary body.

2. The intelligent high-speed rotor dynamic balance detection device according to claim 1, characterized in that: The inner edge of the upper end of the follow-up detection barrel is fixedly attached with multiple direction-determining capacitor plates, which together with the outer cylindrical surface of the balancing disk form a direction-determining capacitor; the upper end of the elastic shaft is clamped on the center claw, and the center claw is arranged on the rotating shaft of the elastic shaft variable frequency drive motor; the elastic shaft variable frequency drive motor and the main shaft variable frequency drive motor at the upper end are installed in axial tandem.

3. An intelligent high-speed rotor dynamic balance detection method using the intelligent high-speed rotor dynamic balance detection device according to any one of claims 1 to 2, characterized in that: The intelligent high-speed rotor dynamic balancing detection method includes: the detection circuit is composed of a direction-detecting capacitor, a ring capacitor, and a basic capacitor connected in series, the change in capacitance causes the voltage division value of the capacitor to change accordingly, the amplifier circuit amplifies the detected radial displacement information to the volt level required for digital circuit processing, and sends it to a microcomputer after digital-to-analog conversion; the computer application software analyzes and compares the data in each direction, determines the actual direction and displacement of the radial displacement, and provides accurate balancing data for subsequent quality balancing.

4. The intelligent high-speed rotor dynamic balance detection method according to claim 3, characterized in that: The intelligent high-speed rotor dynamic balancing detection method comprises: a detection gap exists between the outer cylindrical surface of the balancing disk as the common electrode of the direction-detecting capacitor and a plurality of direction-detecting capacitor plates fixed on the inner edge of the detection barrel, the gap changes with the centrifugal force generated by the rotation of the balancing disk, the change of the gap between the capacitor plates is converted into an electrical signal through a detection bridge, and the detection signal is transmitted to a microcomputer through a transmission capacitor on the cylindrical surface of the follow-up detection barrel to control and identify the direction of action of the rotating centrifugal force.

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