阅读说明：本技术 有级永磁节能调速机的调速方法 (Speed regulating method of stepped permanent magnet energy-saving speed regulator ) 是由 程娟 于 2019-10-30 设计创作，主要内容包括：本发明提供一种方法简单、易于操作、可靠性好的有级永磁节能调速机的调速方法,它尤其适用于负载的实际功率比电机的额定功率小并需要调节转速固定在某一固定值上的情形。所述有级永磁节能调速机包括同轴线的驱动盘和被驱动盘；驱动盘上固定金属导体；被驱动盘外周固定永磁体；永磁体与金属导体在径向相对且有间隙；推远螺栓与驱动盘以螺旋副相连,推远螺栓的末端与被驱动盘接触；拉近螺栓穿过驱动盘与被驱动盘以螺旋副相连,拉近螺栓的头部与驱动盘侧面接触；调速时,把驱动盘在轴向位置固定,被驱动盘在从动轴上轴向活动,通过转动推远螺栓或拉近螺栓,沿轴向把被驱动盘向远离或靠近驱动盘的方向推动或拉近；调节完成,拆卸推远螺栓和拉近螺栓。(The invention provides a speed regulating method of a step permanent magnet energy-saving speed regulator, which has the advantages of simple method, easy operation and good reliability, and is particularly suitable for the situation that the actual power of a load is smaller than the rated power of a motor and the rotating speed needs to be regulated and fixed on a certain fixed value. The stepped permanent magnet energy-saving speed regulator comprises a driving disc and a driven disc which are coaxial; a metal conductor is fixed on the driving disc; the periphery of the driven disc is fixed with a permanent magnet; the permanent magnet and the metal conductor are opposite in the radial direction and have a gap; the pushing bolt is connected with the driving disc through a screw pair, and the tail end of the pushing bolt is contacted with the driven disc; the drawing bolt penetrates through the driving disc and is connected with the driven disc through a screw pair, and the head of the drawing bolt is in contact with the side face of the driving disc; when the speed is regulated, the driving disk is fixed at the axial position, the driven disk moves axially on the driven shaft, and the driven disk is pushed or pulled in the direction far away from or close to the driving disk along the axial direction by rotating the pushing bolt or the pulling bolt; and (5) after the adjustment is finished, detaching the pushing bolt and the pulling bolt.)

1. The speed regulating method of the step permanent magnet energy-saving speed regulator comprises a coaxial driving disk and a coaxial driven disk, wherein the driving disk is used for being connected with a driving shaft, and the driven disk is used for being connected with a driven shaft; a metal conductor is fixed on the driving disc; the periphery of the driven disc is fixed with a permanent magnet; the permanent magnet and the metal conductor are opposite in the radial direction, and a gap is reserved between the permanent magnet and the metal conductor; the method is characterized in that: the speed regulation method adopts a pushing bolt and a pulling bolt which are parallel to an axis; the pushing bolt is connected with the driving disc through a screw pair, and the tail end of the pushing bolt is contacted with the driven disc; the drawing bolt penetrates through the driving disc and is connected with the driven disc through a screw pair, and the head of the drawing bolt is in contact with the side face of the driving disc; when the speed is regulated, the driving disc is fixed at the axial position, the driven disc axially moves on the driven shaft, the driven disc is pushed in the direction far away from the driving disc along the axial direction by rotating the far-pushing bolt, and the driven disc is pulled in the direction close to the driving disc along the axial direction by rotating the near-pulling bolt; after the adjustment is completed, the driven disk is axially fixed on the driven shaft, and then the pushing bolt and the pulling bolt are disassembled.

2. The speed regulation method of the stepped permanent magnet energy-saving speed regulator as claimed in claim 1, characterized in that: the driving disc is connected with the coupler through a bolt, and a first expansion sleeve is arranged in an inner hole of the coupler.

3. The speed regulation method of the stepped permanent magnet energy-saving speed regulator as claimed in claim 1, characterized in that: and a second expansion sleeve is arranged in the inner hole of the driven disc.

4. The speed regulation method of the stepped permanent magnet energy-saving speed regulator as claimed in claim 1, characterized in that: the periphery of the driving disk is connected with a radiating fin.

5. The speed regulation method of the stepped permanent magnet energy-saving speed regulator as claimed in claim 1, characterized in that: the conical generatrix on the inner surface of the metal conductor forms an included angle with the axis, and the included angle is 2-5 degrees.

Technical Field

The invention belongs to the field of electromechanics, and particularly relates to a speed regulating method of a stepped permanent magnet energy-saving speed regulator.

Background

The permanent magnet speed governor comprises a driving rotor and a driven rotor which are coaxial; a permanent magnet is fixed on the periphery of the driven rotor arranged on the driven shaft; fixing a metal conductor on the periphery of the driving rotor; the permanent magnet and the metal conductor are opposite in the radial direction, and a gap is reserved between the permanent magnet and the metal conductor; when the axial position of the driven rotor relative to the driving rotor is adjusted through the adjusting device, the permanent magnet on the driven rotor axially moves relative to the metal conductor, so that the length of the permanent magnet and the metal conductor which are overlapped in the axial direction is changed, the magnetic flux is also changed, the transmitted power is changed, and the speed regulation purpose is realized. However, the existing adjusting device has the disadvantages of complex structure, difficult installation and debugging and low overall reliability.

For example, ZL2015109117903 discloses a permanent magnet governor that is fixed by a drive rotor on a spline housing that mates with a splined output shaft; the spline output shaft is rotatably arranged on the positioning bearing sleeve through a positioning bearing; a worm and gear mechanism and an actuating mechanism for driving the worm to rotate are arranged on the positioning bearing sleeve; the spline sleeve is rotationally arranged on the speed-regulating bearing sleeve through a speed-regulating bearing, and a sliding guide rod and a screw rod which are parallel to the spline output shaft are fixed on the speed-regulating bearing sleeve; the screw rod is matched with a coaxial worm wheel; the sliding guide rod is in sliding fit with a positioning bearing seat supporting a positioning bearing sleeve in the direction parallel to the axis of the spline output shaft. The worm is driven by an actuating mechanism, the worm gear rotates, and a lead screw matched with the worm gear drives a speed regulating bearing sleeve, a spline sleeve, a driven rotor and a permanent magnet to axially move relative to a spline output shaft, so that the relative position of the permanent magnet and a metal conductor is changed.

The speed regulating device in the technology mainly comprises an actuating mechanism, a worm and gear mechanism, a screw rod, a speed regulating bearing sleeve, a sliding guide rod, a positioning bearing seat and the like, wherein the actuating mechanism acts to drive the worm to rotate, the worm gear matched with the worm rotates, and the screw rod matched with the worm gear (driving the speed regulating bearing sleeve, the speed regulating device, the spline sleeve, a driven rotor and the like) axially moves due to the fact that the worm gear cannot axially move, so that the relative position of the permanent magnet and the metal conductor is changed, and the speed regulating purpose is achieved. The sliding guide rod is in sliding fit with the positioning bearing seat, and plays a reliable guiding role in the movement of the screw rod and the speed regulation bearing sleeve.

The permanent magnet speed regulator has the advantages of high reliability, low cost and obvious energy-saving effect, but the speed regulator is complex, and is inconvenient to install, debug and maintain, and is particularly not suitable for the conditions that the actual power of a load is smaller than the rated power of a motor and the rotating speed is fixed on a certain fixed value.

Disclosure of Invention

The invention aims to provide a speed regulating method of a stepped permanent magnet energy-saving speed regulator, which is simple in method, easy to operate and good in reliability, and is particularly suitable for the situation that the actual power of a load is smaller than the rated power of a motor and the rotating speed needs to be regulated and fixed on a certain fixed value.

The invention relates to a speed regulating method of a stepped permanent magnet energy-saving speed regulator, wherein the stepped permanent magnet energy-saving speed regulator comprises a coaxial driving disk and a coaxial driven disk, wherein the coaxial driving disk is used for being connected with a driving shaft, and the coaxial driven disk is used for being connected with a driven shaft; a metal conductor is fixed on the driving disc; the periphery of the driven disc is fixed with a permanent magnet; the permanent magnet and the metal conductor are opposite in the radial direction, and a gap is reserved between the permanent magnet and the metal conductor; the speed regulation method adopts a pushing bolt and a pulling bolt which are parallel to an axis; the pushing bolt is connected with the driving disc through a screw pair, and the tail end of the pushing bolt is contacted with the driven disc; the drawing bolt penetrates through the driving disc and is connected with the driven disc through a screw pair, and the head of the drawing bolt is in contact with the side face of the driving disc; when the speed is regulated, the driving disc is fixed at the axial position, the driven disc axially moves on the driven shaft, the driven disc is pushed in the direction far away from the driving disc along the axial direction by rotating the far-pushing bolt, and the driven disc is pulled in the direction close to the driving disc along the axial direction by rotating the near-pulling bolt; after the adjustment is completed, the driven disk is axially fixed on the driven shaft, and then the pushing bolt and the pulling bolt are disassembled.

According to the speed regulating method of the stepped permanent magnet energy-saving speed regulator, the driving disc is connected with the coupler through the bolt, and the first expansion sleeve is arranged in the inner hole of the coupler.

In the speed regulating method of the stepped permanent magnet energy-saving speed regulator, the second expansion sleeve is arranged in the inner hole of the driven disk.

In the speed regulating method of the stepped permanent magnet energy-saving speed regulator, the periphery of the driving disk is connected with the radiating fins.

In the speed regulating method of the stepped permanent magnet energy-saving speed regulator, the conical generatrix on the inner surface of the metal conductor forms an included angle with the axis, and the included angle is 2-5 degrees.

The implementation of the invention is based on the principle that: when a bulk metal conductor is placed in an alternating magnetic field, eddy currents will flow in the conductor. The magnetic field generated by the eddy current interacts with the original alternating magnetic field to generate magnetic interaction. When the magnetism acts on a rotating driven disk mutually, torque is generated, and power transmission is realized. To adjust the axial position of the driven disk, this patent uses a push bolt and a pull bolt parallel to the axis. By adopting the structure, when the remote bolt pushes the permanent magnet on the driven disk to move towards the non-driving end, the magnetic flux is reduced, the eddy current is correspondingly reduced, the magnetic field generated by the eddy current is weakened, the magnetic field generated by the eddy current interacts with the magnetic field of the permanent magnet on the circumference of the driven disk, the magnetic force is weakened, the output torque is reduced, and the load rotating speed is reduced. When the permanent magnet on the driven disk is adjusted to move towards the driving end by the drawing bolt, magnetic flux is increased, eddy current is correspondingly increased, a magnetic field generated by the eddy current is increased, the magnetic field generated by the eddy current interacts with a magnetic field of the permanent magnet on the circumference of the driven disk, magnetic force is increased, output torque is increased, and load rotating speed is increased. The patent utilizes the characteristic of permanent magnet speed regulation to regulate the driven disk to the rotating speed required by a client by utilizing the regulating bolts (the pushing bolt and the pulling bolt), and then the regulating bolts are disassembled and opened, thus realizing the step speed regulation. The application range is as follows: in general, the actual power of the load is lower than the rated power of the electric machine and the rotational speed is fixed at a fixed value.

The energy-conserving governor of level permanent magnetism that this patent adopted reliability is high, simple to operate, and simple structure, complete soft start, stifled commentaries on classics automatic protection can adapt to adverse circumstances, and electric power and pipe loss are saved to the high steerable flow of practicality, can frequently open and stop and reduce the damage probability and reduce the loss, and easy maintenance has wide application prospect in the speed governing field.

Drawings

FIG. 1 is a schematic structural diagram of a horizontal type stepped permanent magnet energy-saving speed governor;

fig. 2 is a schematic diagram of the horizontal type step permanent magnet energy-saving speed regulator in a use state.

In the figure, a coupler 1, a bolt 2, a pushing bolt 31, a screw hole 41, a pulling bolt 32, a unthreaded hole 42, a pulling bolt head 321, a driving disk framework 4, a cooling fin 5, a cooling fin screw 6, a metal conductor 7, a permanent magnet 8, a driven disk 9, a threaded hole 92, a second expansion sleeve 10, a first expansion sleeve 11, a motor 12 and a load 13.

Detailed Description

For a detailed description of the present invention, reference will now be made in detail to the accompanying drawings.

Referring to the horizontal type step permanent magnet energy-saving speed regulator shown in fig. 1, a coupler 1 connected with a driving shaft of a motor 12 extending in the horizontal direction is connected with a driving disc 4 through a bolt 2, and a first expansion sleeve (Z2 expansion sleeve) 11 is arranged in an inner hole of the coupler. The inner bore of the driven disk 9 for connection to the driven shaft of a horizontally extending load 13 is provided with a second expansion sleeve (Z3 expansion sleeve) 10. The driving plate 4 is coaxial with the driven plate 9. A metal conductor 7 is fixed on the driving disc 4; the periphery of the driven disc 9 is fixed with a permanent magnet 8; the permanent magnet 8 is diametrically opposed to the metal conductor 7 with a gap therebetween. The conical generatrix on the inner surface of the metal conductor 7 forms an included angle with the axis, and the included angle is 2-5 degrees. The driving disk 4 is connected with a radiating fin 5 on the periphery through a screw 6.

The pushing bolt 31 parallel to the axis is connected with the screw hole 41 on the driving disk in a screw pair, and the tail end of the pushing bolt is contacted with the driven disk; the axial parallel drawing bolt 32 passes through the unthreaded hole 42 on the driving disk and is connected with the threaded hole 92 on the driven disk in a screw pair, and the head 321 of the drawing bolt is contacted with the side surface of the driving disk.

When the driving disc is fixed in the axial position (for example, when the first expansion sleeve 11 is tightened, the driving shaft of the motor is connected with the coupler), and the driven disc can move axially, the driven disc is pushed in the axial direction to a direction far away from the driving disc by rotating the distancing bolt (at this time, the head of the distancing bolt cannot be contacted with the side face of the driving disc), and the driven disc is approached in the axial direction to a direction close to the driving disc by rotating the distancing bolt (at this time, the tail end of the distancing bolt cannot be contacted with the driven disc). Specifically, when the driven disc 9 is axially moved (moved rightward) toward the non-driving end by rotating and pushing the bolt 31 clockwise, the overlapping area between the metal conductor (e.g., copper ring) 7 on the driving disc and the permanent magnet 8 on the driven disc is reduced, the magnetic flux is reduced, the magnetic field generated by eddy current in the metal conductor 7 is weakened, the magnetic field generated by eddy current interacts with the magnetic field of the permanent magnet 8 on the circumference of the driven disc, the magnetic force is weakened, the output torque is reduced, and the load rotation speed is reduced. When the driven disc 9 is pulled by rotating the pulling-up bolt 32 clockwise, the driven disc 9 moves axially (moves leftwards) towards the driving end of the motor, at this time, the overlapping area of the metal conductor 7 on the driving disc and the permanent magnet 8 on the driven disc is increased, the magnetic flux is increased, the magnetic field generated by eddy current in the metal conductor 7 is strengthened, the magnetic field generated by the eddy current interacts with the magnetic field of the permanent magnet 8 on the circumference of the driven rotor, the magnetic force is strengthened, the output torque is increased, and the load rotating speed is increased.

After the driven disk is adjusted to the corresponding position, the driven disk is axially fixed, and the pushing bolt 31 and the pulling bolt 32 can be detached, so that the step speed regulation is realized.

In order to take away the heat generated by the eddy current, the heat radiating fins 5 are arranged on the periphery of the driving disk 4, so that when the driving disk 4 is driven by the motor to rotate, part of cooling air cools the outer surface of the driving disk through the heat radiating fins 5; while another part of the cooling air passes inside the drive disc, cooling the metal conductor 7. In order to improve the cooling effect of the cooling air, the conical generatrix on the inner surface of the metal conductor 7 is designed to form an included angle with the axis of the motor shaft, and the included angle is 2 degrees.

This patent utilizes the adjusting bolt who is connected on driving-disc and the driven disc to adjust the driven disc and carry out axial displacement, has just so changed the magnetic flux between driving-disc and the driven disc, and there is the slip driving-disc and driven disc, and the eddy current size changes, and then changes the output torque, realizes the purpose to the load speed governing.