A magnetic integrated roller press drive system

Abstract

The present invention provides a magnetic integration roller press drive system, which belongs to the field of mechatronic transmission technology, including a high-efficiency, low-speed, high-torque direct-drive permanent magnet motor, a magnetic coupling damper, a universal joint, a damper control system, a high-voltage frequency converter and a coupling, wherein the high-voltage frequency converter drives the high-efficiency, low-speed, high-torque direct-drive permanent magnet motor to generate torque and speed, the magnetic coupling damper is fixed to the motor shaft extension end through a support assembly, the universal joint is connected to the high-efficiency, low-speed, high-torque direct-drive permanent magnet motor shaft extension end and the roller press grinding roller through a coupling, and the magnetic coupling damper is controlled by a damper control system. The system of the present invention has a simple structure, a small volume, high efficiency, and low noise, and can greatly improve the transmission efficiency of the system, improve the reliability and stability of the system, reduce the maintenance cost of the transmission system, and ensure the safety of production.

Description

Technical Field

[0001] The invention relates to the technical field of mechatronic transmission, and in particular to a magnetic integrated roller press drive system. Background Art

[0002] Low-speed, high-torque transmission systems have extremely broad application prospects in industrial production, oil and coal mining, wind power generation, port lifting and ship propulsion. The traditional induction motor plus mechanical reduction mechanism drive system has the disadvantages of complex structure, easy wear of the reduction mechanism, lubricating oil leakage, poor operation reliability, high maintenance cost and low overall system efficiency, which does not meet the requirements of economic development, energy conservation and environmental protection. The use of low-speed direct drive to replace the traditional drive system has received widespread attention and application. When the induction motor is designed with a low rated speed, the number of poles is large, and the increase in excitation current seriously reduces the power factor and efficiency. Therefore, the induction motor is not suitable for low-speed, high-torque direct drive. With the development and progress of technology, people have higher and higher requirements on the functions and use environment of electromechanical transmission systems, especially on the efficiency, power factor, vibration and noise of the transmission system, equipment maintenance costs, system reliability, stability and safety.

[0003] Therefore, it is necessary to develop a new roller press drive system. Summary of the invention

[0004] In view of this, the present invention provides a magnetic integrated roller press drive system, which not only has the advantages of high efficiency and energy saving, high transmission efficiency, low vibration and noise, simple structure, low maintenance cost and high reliability and safety, but also can effectively improve the economic benefits of production, reduce production costs and ensure production safety.

[0005] In order to solve the above technical problems, the present invention provides a magnetic integrated roller press drive system, including a high-efficiency, low-speed, high-torque direct-drive permanent magnet motor, a high-voltage inverter, a magnetic coupling damper, a damper controller, a universal joint and a coupling. The high-voltage inverter is connected to the high-efficiency, low-speed, high-torque direct-drive permanent magnet motor, the magnetic coupling damper is fixed to the shaft extension end of the high-efficiency, low-speed, high-torque direct-drive permanent magnet motor through a supporting assembly, the damper controller is connected to the magnetic coupling damper, and the two ends of the universal joint are respectively connected to the shaft extension end of the high-efficiency, low-speed, high-torque direct-drive permanent magnet motor and the roller of the roller press through a coupling.

[0006] Specifically, an ultra-low-speed, high-efficiency, low-speed, high-torque direct-drive permanent magnet motor is used as the driving source of the magnetic integration roller press drive system. The electromagnetic scheme of the motor is a fractional slot concentrated winding pole slot combination, and the stator winding of the motor is a flat copper wire forming coil element embedded in one tooth. After the stator coil of the motor is embedded, it is connected to a balanced three-phase motor wiring form through internal wiring according to the wiring schematic diagram. The wiring and three-phase lead wire welding are done well, and the three-phase lead wire is connected to the motor terminal box. The motor rotor core is composed of high-performance silicon steel sheets stacked. The rotor core silicon steel sheets are stamped with slots for placing permanent magnets. The permanent magnets are installed alternately in N and S along the circumferential direction of the rotor core according to the number of motor poles.

[0007] Furthermore, the stator, rotor and other related components of the ultra-low-speed, high-efficiency, low-speed, high-torque direct-drive permanent magnet motor are assembled into a complete motor through the designed tooling.

[0008] Furthermore, a no-load drag test was carried out on the assembled low-speed, high-torque direct-drive permanent magnet motor to test the no-load back electromotive force and electromotive force waveform of the motor.

[0009] Furthermore, system control tests and motor type tests are carried out using high-voltage inverters and motors.

[0010] Furthermore, the magnetic coupling damper includes an excitation stator, a vibration-reducing rotor damping ring and related mounting components. The excitation stator is a four-salient pole structure. The four salient pole cores are equipped with excitation flat copper wire pole coils. The lead wires at both ends of each pole coil are separately led out for power supply. The vibration-reducing rotor damping ring is made of high-performance silicon steel sheets laminated and installed at a fixed position at the shaft extension end of the motor.

[0011] Furthermore, the four magnetic pole coils of the magnetic coupling damper are powered separately through the damper controller to adjust the eccentricity and vibration of the motor rotor during rotation.

[0012] Furthermore, two ends of the universal joint are respectively connected to the shaft extension end of the high-efficiency, low-speed, high-torque direct-drive permanent magnet motor and the grinding roller of the roller press through a coupling.

[0013] Furthermore, the power transmission system motor of the magnetic integrated roller press drive system and the roller press are connected together through a coupling and a universal joint.

[0014] Furthermore, the magnetic coupling damper provides protection for the motor and the entire transmission system, and the universal joint has the function of transmitting power and protecting the transmission system.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects:

[0016] 1. The present invention discloses a magnetic integrated roller press drive system, which includes a low-speed direct-drive high-torque permanent magnet motor, a high-voltage inverter, a magnetic coupling vibration reducer, a damper controller, a universal joint, and a coupling. The roller press drive system greatly simplifies the transmission system structure and eliminates the gearbox. The system has the characteristics of high efficiency and energy saving, high transmission efficiency, low vibration and noise, simple structure, low maintenance cost, and high reliability.

[0017] 2. The high-speed direct-drive high-torque permanent magnet motor with a near-pole slot multi-pole fractional slot concentrated winding structure design has the characteristics of simple structure, high efficiency, low noise, low temperature rise, low cost, high power factor and high reliability.

[0018] 3. The specially designed magnetic coupling damper has a simple structure, in which the excitation part and the rotor part are matched with a large gap. The eccentricity of the rotor is adjusted by controlling the current of the excitation part coil, so that the rotor is always located at the center of the shaft, which greatly reduces the damage to the motor bearing caused by the radial force generated by the roller press and effectively improves the reliability of the motor.

[0019] 4. Since the roller press drive system cancels the reduction box, the structure of the transmission system is greatly improved, and the transmission system also has the characteristics of more efficient energy saving, low vibration and noise, low maintenance cost and high reliability.

[0020] 5. The role of the universal joint. Since the roller of the roller press is eccentric during rotation, the motor transmission torque shaft is not concentric with the roller press. The eccentric roller press shaft produces obvious radial force, which causes great harm to the motor bearings. The universal joint enables the two shafts to rotate continuously even if they are not on the same axis through the existing axis angle, and reliably transmit torque and motion, which provides good protection for the motor and motor bearings, greatly improving the reliability of the motor and motor bearings, and also greatly improving the reliability of the entire roller press drive system.

[0021] 6. The magnetic integrated roller press drive system of the present invention is applicable to various low-speed direct-drive industrial equipment fields and has good economic and social benefits.

[0022] 7. The magnetic integrated roller press drive system of the present invention eliminates the reduction box of the traditional low-speed system, greatly simplifies the structure of the traditional roller press drive system, and the transmission system has the characteristics of high efficiency and energy saving, high transmission efficiency, low vibration and noise, simple structure, low maintenance cost, high reliability, etc. The present invention has the characteristics of wide application field, good economic and social benefits, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the present invention;

[0024] Figure 2Schematic diagram of the structure of the magnetic coupling damper in the present invention;

[0025] Figure 3 It is a schematic diagram of the stator module structure of a unit motor of the high-efficiency, low-speed, high-torque direct-drive permanent magnet motor in the present invention;

[0026] Figure 4 It is a schematic diagram of the rotor module structure of a unit motor of a high-efficiency, low-speed, high-torque direct-drive permanent magnet motor in the present invention;

[0027] In the figure:

[0028] 1. High-efficiency, low-speed, high-torque direct-drive permanent magnet motor; 2. Coupling; 3. Magnetic coupling damper; 4. High-voltage inverter; 5. Universal joint; 6. Damper controller; 7. Roller press roller; Base 8; 9. Main pole shoe; 10. Main pole coil; 11. Auxiliary pole shoe; 12. Auxiliary pole coil; 13. Magnetic coupling damper rotor; 14. Main pole N; 15. Auxiliary pole S; 16. First and last wire end identification of the main pole coil; 17. Stator core; 18. Coil element; 19. Permanent magnet; 20. Rotor pole core; 21. Non-magnetic magnetic isolation block; 22. Rotor pole shoe support block; 23. Rotor pole mounting ring; 24. Rotor support rib; 25. Solid shaft. DETAILED DESCRIPTION

[0029] To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the following will be combined with the appended drawings of the embodiments of the present invention. Figure 1-4 , the technical scheme of the embodiment of the present invention is clearly and completely described. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0030] like Figure 1 As shown, a magnetic integrated roller press drive system includes a high-efficiency, low-speed, high-torque direct-drive permanent magnet motor 1, a high-voltage inverter 4, a magnetic coupling damper 3, a damper controller 6, a universal joint 5 and a coupling 2. The high-voltage inverter 4 is connected to the high-efficiency, low-speed, high-torque direct-drive permanent magnet motor 1, the magnetic coupling damper 3 is fixed to the shaft extension end of the high-efficiency, low-speed, high-torque direct-drive permanent magnet motor 1 through a supporting assembly, the damper controller 6 is connected to the magnetic coupling damper 3, and both ends of the universal joint 5 are respectively connected to the shaft extension end of the high-efficiency, low-speed, high-torque direct-drive permanent magnet motor 1 and the roller press grinding roller 7 through a coupling 2.

[0031] In this embodiment, the high-efficiency, low-speed, high-torque direct-drive permanent magnet motor 1 and the magnetic coupling damper 3 are installed on the base 8, the motor shaft extension and the left shaft extension of the magnetic coupling damper 3 rotor are connected as a whole through the coupling 2, and the two ends of the universal joint 5 are respectively connected to the right shaft extension of the magnetic coupling damper 3 rotor and the roller mill 7 through the coupling 2. The high-efficiency, low-speed, high-torque direct-drive permanent magnet motor 1 is controlled by the high-voltage inverter 4 to generate the speed and torque required by the roller mill, and the speed and torque are transmitted to the roller mill 7 through the motor shaft extension, the magnetic coupling damper 3 and the universal joint 5, thereby driving the load roller mill to work. Since the roller mill 7 is eccentric during the rotation process, the motor transmission torque shaft is not concentric with the roller mill, and the eccentric roller mill shaft generates obvious radial force, which causes great harm to the motor bearing. The universal joint enables the two shafts to achieve continuous rotation of the connected two shafts through the existing axis angle even if they are not on the same axis, and reliably transmit torque and motion, which protects the motor and the motor bearing. Similarly, the eccentricity of the rotor is adjusted by controlling the current of the excitation part coil of the magnetic coupling damper 3 through the damper controller 6, so that the rotor is always located at the center of the shaft to reduce the damage to the motor bearing caused by the radial force generated by the roller press, thereby improving the reliability of the motor and the reliability of the entire roller press drive system.

[0032] like Figure 2 As shown in the figure, it is a schematic diagram of the structure of the magnetic coupling damper 3 in the present invention, 9 is the main magnetic pole shoe, 10 is the main magnetic pole coil, 11 is the auxiliary magnetic pole shoe, 12 is the auxiliary magnetic pole coil, 13 is the magnetic coupling damper rotor, 14 is the main magnetic pole N, 15 is the auxiliary magnetic pole S, and 16 is the head and tail wire end mark of the main magnetic pole coil. Through the wiring method shown in the figure, four main magnetic poles are formed, a single main magnetic pole includes a main magnetic pole coil and two adjacent auxiliary magnetic pole coils, the head and tail wire ends of a single main magnetic pole coil are marked as Yp^+, Xp^-, and the four main magnetic pole coils are separately led out according to the head and tail wire end marks in the figure and are independently powered by the damper controller 6. When a single main magnetic pole coil is powered, the magnetic pole structure of the single main magnetic pole is S, N, S type. When the four main magnetic pole coils are powered at the same time, the stator side forms a magnetic pole structure of S, N, S, S, N, S, S, S, N, S, S, S, N, S alternating along the circumferential direction as shown in the figure. According to the eccentricity signal of the coupling damper rotor detected by the displacement sensor, the magnitude of the excitation coil current is controlled to ensure that the motor shaft and the coupling damper rotor are always located at the center of the rotating shaft.

[0033] like Figure 3 and Figure 4As shown, the high-efficiency, low-speed, high-torque direct-drive permanent magnet motor 1 adopts a near-pole slot matching structure with a high winding factor, and the stator winding structure of the motor is a fractional slot concentrated winding, that is, a single stator sleeve straight coil element structure, and this scheme has the characteristics of high power density and torque density. The stator and rotor of the motor are designed in the structural form of a unit motor, and the stator and rotor are modularly installed, and the manufacturing cost of the stator and rotor is low, and the modular installation is simple.

[0034] in, Figure 3 It is a stator module structure of a unit motor, 17 is a stator core of a unit motor, the stator core is made of high magnetic induction and low loss silicon steel sheets, 18 is a coil element, two coil element edges are embedded side by side in each stator slot, and the coil element is made of flat copper wire through a special coil mill. This solution has short motor stator winding ends, less copper consumption, high motor efficiency, easy coil installation, and easy modular stator manufacturing and installation.

[0035] in, Figure 4 The rotor module structure of a unit motor, the motor rotor shaft adopts a reinforcing shaft structure, such as Figure 4 In the invention, the rotor shaft is composed of 23 rotor pole mounting rings, 24 rotor support ribs and 25 solid shafts. The structure is simple to manufacture and uses less materials. A hollow axial ventilation duct is formed between 24 rotor support ribs, so that the motor has good heat dissipation. The outer circle of 23 rotor pole mounting rings is processed with mounting holes for mounting rotor pole shoes according to the magnetic pole structure. First, the rotor pole shoes are fixed according to the rotor pole shoe mounting holes of the outer circle of 23 rotor pole mounting rings. The rotor pole shoes are composed of 20 rotor pole cores and 22 rotor pole shoe support blocks. In order to maximize the performance of the motor and reduce the rotor leakage, 20 rotor pole cores are made of high magnetic induction and low loss silicon steel sheets, and 22 rotor pole shoe support blocks are made of non-magnetic stainless steel. After the rotor pole shoes are installed, 21 non-magnetic magnetic isolation blocks are installed at the bottom of the gap between the two rotor pole shoes. After winding, 19 permanent magnets are installed above 21 non-magnetic magnetic isolation blocks according to the N and S polarities of the permanent magnets.

[0036] The present invention provides a magnetic integrated roller press drive system with high efficiency and energy saving, high transmission efficiency, low vibration and noise, simple structure, low maintenance cost, and high reliability and safety, and can effectively improve the economic benefits of production, reduce production costs, and ensure production safety. The present invention mainly includes a high-efficiency, low-speed, high-torque direct-drive permanent magnet motor 1, a magnetic coupling damper 3, and a damper controller 6. The present invention includes the above-mentioned modular stator and modular rotor of the high-efficiency, low-speed, high-torque direct-drive permanent magnet motor, and also includes the above-mentioned structure and scheme of the magnetic coupling damper 3.

[0037] In the present invention, unless otherwise clearly stipulated and limited, for example, it can be a fixed connection, a detachable connection, or an integrated one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, for ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0038] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A magnetic integrated roller press drive system, characterized in that: It includes a high-efficiency, low-speed, high-torque direct-drive permanent magnet motor, a high-voltage frequency converter, a magnetic coupling damper, a damper controller, a universal joint and a coupling. The high-voltage frequency converter is connected to the high-efficiency, low-speed, high-torque direct-drive permanent magnet motor. The magnetic coupling damper is fixed to the shaft extension end of the high-efficiency, low-speed, high-torque direct-drive permanent magnet motor through a supporting component. The damper controller is connected to the magnetic coupling damper. The motor shaft extension and the left shaft extension of the magnetic coupling damper rotor are connected as a whole through a coupling. The two ends of the universal joint are respectively connected to the right shaft extension of the magnetic coupling damper rotor and the roller of the roller press through a coupling. The magnetic coupling damper comprises a main magnetic pole shoe, a main magnetic pole coil, an auxiliary magnetic pole shoe, an auxiliary magnetic pole coil, a magnetic coupling damper rotor, a main magnetic pole N, and an auxiliary magnetic pole S. After connection, four main magnetic poles are formed. A single main magnetic pole comprises a main magnetic pole coil and two adjacent auxiliary magnetic pole coils. When a single main magnetic pole coil of the magnetic coupling damper is powered, the magnetic pole structure of the single main magnetic pole is S, N, S type. When the four main magnetic pole coils are powered at the same time, a magnetic pole structure of S, N, S, S, N, S, S, S, N, S, alternating along the circumferential direction of the stator side is formed. The high-efficiency, low-speed, high-torque direct-drive permanent magnet motor adopts a near-pole slot matching structure with a high winding factor; the motor stator winding structure is a fractional slot concentrated winding; the motor rotor shaft adopts a rib-hugging shaft structure, and the rotor shaft is composed of a rotor pole mounting ring, rotor support ribs and a solid shaft; a hollow axial ventilation duct is formed between the rotor support ribs; the outer circle of the rotor pole mounting ring is processed with mounting holes for installing the rotor pole shoes according to the pole structure, and the rotor pole shoes are fixed according to the rotor pole shoe mounting holes on the outer circle of the rotor pole mounting ring. The rotor pole shoes are composed of a rotor pole core and a rotor pole shoe support block. In order to maximize the performance of the motor, the rotor pole core is made of high-magnetic induction and low-loss silicon steel sheets stacked, and the rotor pole shoe support block is made of non-magnetic stainless steel. After the rotor pole shoes are installed, a non-magnetic magnetic isolation block is installed at the bottom of the gap between the two rotor pole shoes, and then the permanent magnet is installed above the non-magnetic magnetic isolation block according to the N and S polarities of the permanent magnet.

2. The magnetic integrated roller press drive system according to claim 1, characterized in that: The rotor core is slotted to install permanent magnets, and the motor rotor runs at low speed.

3. The magnetic integrated roller press drive system according to claim 1 or 2, characterized in that: The input terminal of the high-voltage frequency converter is connected to the power grid, and the output terminal is connected to the terminal of the high-efficiency, low-speed, high-torque direct-drive permanent magnet motor.

4. The magnetic integrated roller press drive system according to claim 1 or 2, characterized in that: The magnetic coupling damper is fixed to the shaft extension end of the high-efficiency, low-speed, high-torque direct-drive permanent magnet motor through a supporting assembly. The magnetic coupling damper includes four groups of coils. The limit protection device is fixed to both ends of the magnetic coupling damper through an assembly. The four groups of coils are evenly distributed along the stator circumference of the magnetic coupling damper, and the four groups of coils are separately connected.

5. The magnetic integrated roller press drive system according to claim 1 or 2, characterized in that: The four output terminals of the damper controller are respectively connected to the four coil connection terminals of the magnetic coupling damper.

6. The magnetic integrated roller press drive system according to claim 1 or 2, characterized in that: The coupling is connected with the shaft extension end of the high-efficiency, low-speed, high-torque direct-drive permanent magnet motor, the roller of the roller press and the two ends of the universal joint, so that the mechanical transmission of the magnetic integrated roller press drive system is integrated.

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