CN-224233532-U - Axial magnetic flux electromagnetic coupling

CN224233532UCN 224233532 UCN224233532 UCN 224233532UCN-224233532-U

Abstract

The utility model relates to an axial magnetic flux electromagnetic coupling which comprises a driving shaft, a driving shaft rotor, permanent magnets, iron cores, magnetic pole coils and a driven shaft, wherein the driving shaft rotor is fixed on the driving shaft, a plurality of permanent magnets which are alternately arranged along the circumferential direction are embedded in the driving shaft rotor, the polarities of adjacent permanent magnets are opposite, the iron cores are fixed on the driven shaft through a fixing frame, the magnetic pole coils are wound on the iron cores, the winding directions of the magnetic pole coils of the adjacent iron cores are opposite, and the magnetic field directions of the permanent magnets are parallel to the magnetic field direction of the magnetized iron cores to form axial magnetic flux coupling. Compared with the traditional rigid, elastic coupling and permanent magnet coupling, the axial magnetic flux electromagnetic coupling has adjustable torque and self-centering operation, and realizes high-quality transmission of electromagnetic torque.

Inventors

ZHANG YANG
WU YI
CHENG ZHAOJUN
DING YAN
YE YUHAN

Assignees

中国船舶集团有限公司第七〇四研究所

Dates

Publication Date: 20260512
Application Date: 20250530

Claims (7)

1. An axial magnetic flux electromagnetic coupling is characterized by comprising a driving shaft, a driving shaft rotor, permanent magnets, iron cores, magnetic pole coils and a driven shaft, wherein the driving shaft rotor is fixed on the driving shaft, a plurality of permanent magnets which are alternately arranged along the circumferential direction are embedded in the driving shaft rotor, the polarities of adjacent permanent magnets are opposite, the iron cores are fixed on the driven shaft through a fixing frame, the magnetic pole coils are wound on the iron cores, the winding directions of the magnetic pole coils of the adjacent iron cores are opposite, and the magnetic field directions of the permanent magnets are parallel to the magnetic field direction of the magnetized iron cores to form axial magnetic flux coupling.
2. The axial flux electromagnetic coupling of claim 1, wherein the permanent magnets are secured to the drive shaft rotor by a rotor yoke.
3. The axial magnetic flux electromagnetic coupling of claim 1, wherein a guard ring is arranged outside the permanent magnet and is sleeved outside the magnetic pole coil.
4. The electromagnetic coupling of claim 1, wherein a baffle is disposed between the core and the mount, the baffle is fixed to the core, the mount is fixed to the driven shaft, and the core is fixed to the mount.
5. The axial flux electromagnetic coupling of claim 1, wherein the drive shaft and the driven shaft are coaxially disposed.
6. The axial flux electromagnetic coupling of claim 1, wherein the pole coils are connected to an external DC power source via a coupling line for adjusting the magnetic field strength.
7. The axial flux electromagnetic coupling of claim 6, wherein the external DC power source is provided by brushes, a brushless excitation system or a wireless energy transfer device.

Description

Axial magnetic flux electromagnetic coupling Technical Field The utility model relates to a non-contact transmission device, in particular to an axial magnetic flux electromagnetic coupling which realizes torque adjustment through coupling of a permanent magnet and an electromagnetic coil. Background Rotary machines typically connect a drive shaft and a driven shaft through a coupling and transmit motion and torque from the drive shaft. The traditional coupling is generally a rigid coupling or an elastic coupling, and is a contact type transmission. The magnetic coupling is a contactless transmission device for transmitting torque based on magnetic field coupling, and generally utilizes a permanent magnet to establish a magnetic field between a driving shaft and a driven shaft so as to realize torque transmission. In the prior art, a magnetic field between a driving shaft and a driven shaft of a magnetic coupling is established by permanent magnets, the magnetic field strength cannot be changed, the electromagnetic torque cannot be adjusted, the permanent magnets of the magnetic coupling are more in consumption and high in cost, the interaction force of the permanent magnets between the driving shaft and the driven shaft is large, centering is difficult, and the starting torque of the magnetic coupling is large. In the prior art, as in CN103765742A, a coil is additionally arranged on a permanent magnet to regulate magnetic flux, but the structure is complex and the magnetic field distribution is not optimized, and the electromagnetic actuator of CN110821958A relates to axial control and does not solve the problem of regulating the torque of a coupler. Therefore, there is a need for a coupling that is simple in construction, torque adjustable and self-centering. Disclosure of Invention In order to solve the problems in the prior art, the utility model provides an axial magnetic flux electromagnetic coupler with adjustable torque, which realizes high-quality transmission of electromagnetic torque and adjustable electromagnetic torque through reasonable combination of a driving shaft rotor, a permanent magnet, an iron core, a magnetic pole coil, a fixing frame, a connecting wire and the like. The axial magnetic flux electromagnetic coupler comprises a driving shaft, a driving shaft rotor, permanent magnets, iron cores, magnetic pole coils and a driven shaft, wherein the driving shaft rotor is fixed on the driving shaft, a plurality of permanent magnets which are alternately arranged along the circumferential direction are embedded in the driving shaft rotor, the polarities of adjacent permanent magnets are opposite, the iron cores are fixed on the driven shaft through fixing frames, the magnetic pole coils are wound on the iron cores, the winding directions of the magnetic pole coils of the adjacent iron cores are opposite, and the magnetic field directions of the permanent magnets are parallel to the magnetic field directions of the magnetized iron cores to form axial magnetic flux coupling. Further, the permanent magnet is fixed in the drive shaft rotor through a rotor yoke. Further, a guard ring is arranged on the outer side of the permanent magnet, and the guard ring is sleeved outside the magnetic pole coil. Further, a baffle is arranged between the iron core and the fixing frame, the baffle is fixed on the iron core, the fixing frame is fixed on the driven shaft, and the iron core is fixed on the fixing frame. Further, the driving shaft and the driven shaft are coaxially arranged. Further, the magnetic pole coil is connected with an external direct current power supply through a connecting wire and used for adjusting the magnetic field intensity; Further, the external direct current power supply is provided by a brush, a brushless excitation system or a wireless energy transmission device. The utility model has the beneficial effects that: The axial magnetic flux electromagnetic coupler is applied to non-contact transmission, provides an excitation energy source for a magnetic pole coil of the electromagnetic coupler through an external direct current power supply, establishes a magnetic field, and is coupled with the magnetic field established by a driving shaft permanent magnet, so that electromagnetic torque is transmitted from a driving shaft to a driven shaft. Compared with the traditional rigid, elastic coupling and permanent magnet coupling, the axial magnetic flux electromagnetic coupling has adjustable torque and self-centering operation, and realizes high-quality transmission of electromagnetic torque. Drawings FIG. 1 is a schematic view of an axial electromagnetic coupling according to the present utility model; In the figure, a driving shaft 1, a driving shaft rotor 2, a rotor yoke 3, a permanent magnet 4, a baffle 5, a guard ring 6, a fixing frame 7, an iron core 8, a magnetic pole coil 9, a connecting wire 10 and a driven shaft 11 are shown. Detailed Description The utility model will now b