WO2016082296A1

WO2016082296A1 - T-type ball screw electric speed regulation disc-type magnetic coupler

Info

Publication number: WO2016082296A1
Application number: PCT/CN2015/000716
Authority: WO
Inventors: 李启飞
Original assignee: 李启飞
Priority date: 2014-11-25
Filing date: 2015-10-26
Publication date: 2016-06-02
Also published as: CN105896893A

Abstract

A T-type ball screw electric speed regulation disc-type magnetic coupler, using an outer rotor motor ball screw speed regulation mechanism (3) and a high speed rotation conducting connector (6) to form a speed regulation system, and classified into four series: an air-cooling T-type ball screw electric speed regulation disc-type magnetic coupler, a liquid-cooling T-type ball screw electric speed regulation disc-type magnetic coupler, a series air-cooling T-type ball screw electric speed regulation disc-type magnetic coupler and a series liquid-cooling T-type ball screw electric speed regulation disc-type magnetic coupler, and the magnetic coupler providing an economical and feasible method for the speed regulation and energy conservation of a dynamic device.

Description

T-type ball screw electric speed disc type magnetic coupler

Technical field

Power transmission, energy saving, dynamic equipment, magnetic drive.

Background technique

Since the use of geomagnetically driven invention compasses by humans, the use of magnetic field energy has not stopped. With the development of modern magnetic theory, the application of magnetic drive products in the industry is endless, such as magnetic pumps, magnetic bearings, magnetic couplers, magnetic gears and so on. Limited to the constraints of magnetic materials, the magnetic drive technology developed slowly. Until 1983, China invented the high-performance permanent magnet material NdFeB, and the magnetic drive products were rapidly developed and applied.

Since the magnetic coupler has been developed as a separate branch from magnetic drive products such as magnetic pumps, various products have emerged, but they are limited to structural reasons and can only be limited to small and medium power, small and medium torque range dynamic equipment power transmission. In use, and expensive. Primary wind turbines such as thermal power plants (6000KW, 1496r/min), secondary fans (4550KW, 1495r/min), coal crushers (1200KW, 490r/min), and large wind turbines in steel mills and mines. Technology and products are unable to meet the needs of practical applications.

Energy conservation and emission reduction are urgent needs. Energy-saving equipment, currently more efficient, variable frequency speed control energy-saving and grooved cam mechanism speed magnetic coupling speed control energy saving. The inverter has a short service life, poor environmental adaptability, large space occupation, high maintenance demand, high failure rate of high-voltage inverter and poor reliability. The grooved cam mechanism variable speed magnetic coupling (cylinder and disc type) that has been applied at present has a limited application range and is expensive due to structural reasons. The liquid-cooled groove cam mechanism speed-regulating magnetic coupling can only be applied to the medium-speed dynamic equipment below 2500KW. The air-cooling groove cam mechanism speed-regulating magnetic coupling can only be applied to the medium-speed dynamic equipment below 350KW. in. The barrel magnetic coupling is even worse. The liquid-cooled speed control product can only be applied to the medium-speed dynamic equipment below 800KW, and the safety and reliability are not high.

Summary of the invention

The invention focuses on finding a technical method for solving the high-power, high-torque dynamic device speed regulation and energy saving, and along with this technical method, four series of T-type ball screw electric speed-regulating disc type magnetic couplers are introduced. Cold T-type ball screw electric speed disc type magnetic coupler (FTT series), liquid-cooled T-type ball screw electric speed disc type magnetic coupler (YTT series), series air-cooled T-type ball screw electric speed control Disc magnetic coupler (CFTT series), series liquid cooled T ball screw electric speed disc type magnetic coupler (CYTT series).

DRAWINGS

Figure 1 shows the air-cooled T-type ball screw electric speed disc type magnetic coupler (FTT series), liquid-cooled T-type ball screw electric speed disc type magnetic coupler (YTT series) with outer casing, coolant through the outer casing The upper pipe enters and exits, forced liquid cooling, and the high-speed rotary conductive joint is placed outside the casing.

Figure 9 is a series air-cooled T-type ball screw electric speed disc type magnetic coupler (CFTT series), series liquid-cooled T-type ball screw electric speed disc type magnetic coupler (CYTT series) with outer casing, coolant Through the pipe on the outer casing, the liquid cooling is forced, and the high-speed rotating conductive joint is placed outside the casing.

The four series of T-type ball screw electric speed-regulating disc type magnetic couplers all include the following parts: 1 and 5 in the figure are induction discs, 2 and 4 are magnetic block fixing discs, and 3 are outer rotor motor ball screws. Bar speed governing mechanism, 6 is a high-speed rotary conductive joint.

For series T-type ball screw electric speed disc type magnetic couplers (CFTT series, CYTT series), theoretically, any group can be connected in series, which can be determined according to needs. Figure 9 shows three groups in series, and the figure 8 is the middle. Inductive disk and magnetic block fixed disk in series.

In the four series of T-type ball screw electric speed disc type magnetic couplers, all the induction discs are connected by limit bolts to form the outer rotor, all the magnetic block fixed discs are connected in series on the central drive shaft, and the outer rotor motor ball wire The bar speed governing mechanism together constitutes an inner rotor, and the central drive shaft has a wire connecting motor (the motor stator is fixed on the central drive shaft, and the central rotating shaft is relatively stationary) and the carbon brush of the high-speed rotating conductive joint (relative to the central drive shaft) The slip ring of the high-speed rotary conductive joint is connected to the external power supply. The bidirectional switch controls the direction of current flow into the motor, thereby changing the direction of the motor. The outer rotor of the motor drives the screw to rotate (gear transmission), the screw rotates, and the screw nut (fixed together with the magnet fixing plate) moves in the axial direction, thereby changing the distance between the magnetic plate fixing plate and the sensing disk (magnetic field coupling) Gap), in order to achieve the purpose of speed regulation and energy saving (change of the magnetic field coupling gap, will lead to changes in the internal and external rotor slip of the magnetic coupling, that is, the change of input and output speed).

Figure 2 and Figure 3 show the ball screw speed regulation mechanism of the outer rotor motor. The center shaft of the motor can be made into a hollow structure (fixed on the center drive shaft with set screws), so that the motor can be mass-produced by professional manufacturers, and the screw can be used. The existing series of products, with gear interference.

Figure 4 and Figure 5 show the high-speed rotary conductive joints. The modular structure is adopted. The number of slip rings is determined according to the requirements. Three slip rings (which can be six or any one) are shown in the figure, and three wires are connected. Ring 6-3, protective layer 6-4 is made of electrically insulating material, 6-5 is a carbon brush, 6-6 is a slip ring (inset in the middle ring 6-3), and 6-7 is a fine-tuning spring (for balanced contact) Pressure), 6-8 for the wire, 6-9 for the right end cover, 6-1 for the left end cover, 6-11 for the bearing, and 6-15 for the bracket. The slip ring is internally connected with a carbon brush and an external external power supply. The carbon brush is mounted on the central drive shaft 6-14 and rotates in synchronism with the central drive shaft. The slip ring 6-6 is embedded in the middle ring 6-3 to form a stationary part, which is fixed on the bracket 6-15, and relies on the bearing 6-11 to isolate the influence of the high speed rotation of the central transmission shaft. The high-speed rotary conductive joint uses a carbon brush and a slip ring as a dynamic contact, and the carbon brush and the slip ring can also be reversely mounted by the carbon brush. Connect the slip ring and connect external power supply. In Fig. 5, the protective layer 6-4 is expanded to the circumferential surface to enhance the insulation protection.

Figure 6 and Figure 7 show the sensing disc with raised blades distributed on the disc surface to help dissipate heat. When the unknown device is rotated, the shape shown in Fig. 6 can be selected. If the device is rotated, the streamline shape shown in Fig. 7 can be selected to increase the heat dissipation and reduce the spoiler noise. In the case of sufficient heat dissipation, the induction disk can be used with a flat plate, and the blade is not required to simplify the manufacturing process.

Figure 8 shows the distribution and shape of the magnetic blocks on the magnetic block fixed disk, and the magnetic block arc transitions to avoid the induced magnetic field malformation caused by the square.

Figure 10 is a series T-type ball screw electric speed disc type magnetic coupler (CFTT series, CYTT series) in the middle of the series inductive disc and magnetic block fixed disc, positioning sleeve 8-1, 8-2 positioning the inductive disc in the magnetic On the coupling screw coupled to the outer rotor, the limiting sleeve 8-8 slides the magnetic block fixing plate on the central transmission shaft to limit the position.

Figure 11 shows the manufacturing process of the elongated hole in the center drive shaft (which can be directly processed for the elongated hole) - it is extruded by aluminum and then nested with the center drive shaft to simplify the machining process and reduce the manufacturing cost.

Figure 12 shows the structure of the FTT series magnetic coupling with the internal two ends of the support bearing. The expansion between the drive shafts is extended. Other series can also be used, but this solution can only be used in low load conditions and the shaft is very The minute case is as follows: the induction discs 1 and 5 are composed of bolted joints to form the outer rotor, and the magnet block fixing discs 2 and 4 are connected to the outer rotor motor ball screw speed governing mechanism 3 by the central drive shaft to form the inner rotor, and the inner and outer rotors are not mutually Contact, but because it is difficult to ensure the parallelism between the induction disk and the magnetic plate fixing plate during assembly, it will cause alternating stress (the effect of magnetic field coupling and additional bending moment) on the bearing support of the motor central shaft bearing and the bearing of the load transmission shaft. As a result, the shaft is excessively worn out. In addition, the effects of the shaft will cause unstable operation and, in severe cases, an accident. In general, such programs should be used with caution.

detailed description

The various components and components included in the T-type ball screw electric speed disc type magnetic coupler can be processed and manufactured by modern industrial manufacturing technology. Ball screws, motors, magnetic blocks, and bearings can be produced by professional manufacturers. Other parts can be machined, molded, and welded.

T-type ball screw electric speed disc type magnetic coupler as a kind of dynamic equipment, the finished product must have the following two conditions to successfully apply: (1) Power calibration - establish a complete test bench (each power torque Interval) to complete the calibration of serialized products. (2) Dynamic balance detection - Rotating equipment must meet the dynamic balance requirements specified by relevant standards to achieve the necessary safety and reliability.

Claims

Air-cooled T-type ball screw electric speed disc type magnetic coupler (FTT series) structure scheme - characterized by outer rotor motor ball screw speed governing mechanism, high-speed rotary conductive joint.
The structural scheme of the liquid-cooled T-type ball screw electric speed-regulating disc type magnetic coupler (YTT series) is characterized by an outer rotor motor ball screw speed governing mechanism, a high-speed rotary conductive joint, an outer casing, and forced liquid cooling.
The structural scheme of the series air-cooled T-type ball screw electric speed-regulating disc type magnetic coupler (CFTT series) is characterized by an outer rotor motor ball screw speed governing mechanism, a high-speed rotary conductive joint, and a series structure (shown in the manual) For three groups of series, two or more groups can be connected in series, and the structure is the same).
The structural scheme of the series liquid-cooled T-type ball screw electric speed-disc type magnetic coupler (CYTT series) is characterized by an outer rotor motor ball screw speed governing mechanism, a high-speed rotary conductive joint, and a series structure (shown in the manual) For three groups in series, two or more groups can be connected in series, the structure is the same), the outer casing is added, and the liquid cooling is forced.
The T-type ball screw electric speed regulating disc type magnetic coupler according to claim 1, claim 2, claim 3, and claim 4 is characterized in that the outer rotor motor ball screw speed regulating mechanism is used for speed regulation Method—the combination of the outer rotor motor and the ball screw. When the power is not connected, the stator, rotor and ball screw assemblies of the outer rotor motor rotate synchronously with the central drive shaft, and are relatively stationary. After the power switch is turned on, the outer rotor motor rotor The stator and the stator rotate relative to each other (the stator of the motor rotates synchronously with the central transmission shaft), so that the screw drive rotates the screw, the screw rotates, and the screw nut moves along the axial direction to drive the magnetic block fixing plate to slide along the central transmission shaft. Thereby changing the distance between the fixed block of the magnetic block and the sensing disk (magnetic field coupling gap), achieving the purpose of speed regulation and energy saving.
The T-type ball screw electric speed-regulating disc type magnetic coupler according to claim 1, claim 2, claim 3 and claim 4 is characterized in that the technical method of using a high-speed rotary conductive joint - using a carbon brush and The slip ring is used as a dynamic contact, the carbon ring is connected to the slip ring, and the external power source is externally connected. The carbon brush is mounted on the central drive shaft and rotates synchronously with the central drive shaft. The slip ring is embedded in the insulating material to form a stationary component, which is fixed on the bracket and depends on Bearing isolation center drive shaft high-speed rotation, you can also reverse the carbon brush and slip ring, the carbon brush is connected to the slip ring, external external power supply.
The series T-type ball screw electric speed regulating disc type magnetic coupler according to claim 3 and claim 4, wherein the magnetic coupling series outer rotor motor ball screw electric speed regulation technology is adopted, The main cable in the shaft controls several sets of external rotor motor ball screw electric speed governing mechanism to move at the same time. This method is used to solve the speed regulation and energy saving of high power and high torque moving equipment.