CN114696568A - Mixed excitation eddy current speed regulation device - Google Patents

Abstract

The invention discloses a mixed excitation eddy current speed regulating device, which comprises an active rotating body and a passive rotating body, wherein the active rotating body comprises a rotating iron core, the rotating iron core is arranged on an active rotating shaft, a plurality of groups of electromagnet groups are arranged on the periphery of the outer side of the rotating iron core in a surrounding manner, each electromagnet group comprises a plurality of electromagnets, each electromagnet is provided with a field coil winding, a permanent magnet disc is arranged at the end part of the rotating iron core corresponding to the passive rotating body, a plurality of permanent magnets with alternately arranged magnetic poles are arranged on the permanent magnet disc, the passive rotating body comprises a passive rotating shaft arranged on a bracket, a copper pipe sleeved on the active rotating body is connected at the end part of the passive rotating shaft corresponding to the active rotating body, an iron pipe is wrapped outside the copper pipe, and the active rotating body extends into the copper pipe of the passive rotating body and is not connected with the inner wall of the copper pipe; the invention reduces the electric excitation loss, obtains controllable output torque and output power, realizes the non-contact regulation of the output torque and the output power and has higher operation efficiency.

Description

A hybrid excitation eddy current speed control device

technical field

The invention relates to the technical field of magnetic coupling transmission, in particular to a hybrid excitation eddy current speed regulating device.

Background technique

The traditional mechanical transmission structure mainly includes gear structure, pulley mechanism, chain structure, worm gear and other structures. These transmission mechanisms are directly and rigidly connected to the load, so there are friction and wear, vibration and noise in the transmission process. The research and application of magnetic coupler has extremely broad space and value. For example, the permanent magnet eddy current governor is a non-contact governor developed based on the principle of electromagnetic induction. Its main function is to realize the motion and power transmission between the motor drive shaft and the load output shaft in the motion system. Its working principle is that when the input shaft drives the permanent magnet disc to rotate, the input shaft and the output shaft form a rotational speed difference. The eddy current generates an anti-inductive magnetic field and interacts with the magnetic field generated by the permanent magnet, thereby realizing the torque transmission between the two, driving the output shaft to rotate, and controlling the speed of the output shaft by changing the size of the air gap between the copper disc and the permanent magnet. and torque magnitude. Another application of permanent magnet transmission technology is the electric excitation eddy current transmission device, which uses hysteresis material, which is a major feature of the device. The difference between the hysteresis material and the permanent magnet material is that the former is easy to change the polarity, so it is easy to adjust the torque and provide excellent operating performance, and it has been widely used at present. But its rated torque is small, because at rated torque, the clutch starts to slip, and the hysteresis material absorbs energy by the system. Due to the change of magnetic pole, the kinetic energy becomes heat, and this part of the heat should be dissipated and cooled in time. The adjustment and control of the torque of the electric excitation eddy current transmission device is provided by the excitation coil, which requires a DC power supply and a control system. It is the best choice in the automatic control system. The integration of magnetic devices with sensors and microprocessors can automate certain processes. For example, when the coil diameter of the winding machine is continuously increased, by controlling the change of the excitation current, the torque also changes accordingly to ensure a constant tension.

The permanent magnet drive has no excitation consumption, but it is inconvenient to use and operate because it adjusts the size of the air gap through a mechanical method or a servo mechanism. The electric excitation drive is easy to adjust, but the electric excitation power consumption is large. In addition, most of the traditional permanent magnet transmission adopts claw structure or disc structure. Although speed regulation can be achieved, the speed regulation efficiency is low, the speed regulation range is small, and the speed regulation is not stable enough.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a hybrid excitation eddy current speed regulating device to solve the problems raised in the above background technology.

For achieving the above object, the present invention realizes by following technical means:

A hybrid excitation eddy current speed regulating device includes an active rotating body and a passive rotating body, the active rotating body includes a rotating iron core, and the rotating iron core is arranged on an active rotating shaft that can adjust the distance relative to the passive rotating body, The outer circumferential position of the rotating iron core is surrounded by several groups of electromagnet groups that surround the rotating iron core, each of the electromagnet groups includes a number of electromagnets, and each of the electromagnets is respectively provided with an excitation coil winding, so the The rotating iron core is provided with a permanent magnet disk at the end position relative to the passive rotating body, the permanent magnet disk is provided with a plurality of permanent magnets with alternately arranged magnetic poles, and the passive rotating body includes a passive rotating shaft arranged on the bracket, The end of the passive rotating shaft relative to the active rotating body is connected with a copper pipe covering the active rotating body, the copper pipe is covered with an iron pipe, and the active rotating body extends into the copper pipe of the passive rotating body And it is not in contact with the inner wall of the copper pipe.

Further, there are 4 groups of equidistantly arranged electromagnet groups around the rotating iron core at the outer circumferential position of the rotating iron core, and each group of the electromagnet groups includes 3 equidistantly arranged electromagnets. There are excitation coil windings on the electromagnets, and the inner magnetic poles and the outer magnetic poles of each electromagnet group are arranged alternately.

Further, the cross-sectional shape of the rotating iron core is an octagon with chamfers at the four corners of the square, and the center of the rotating iron core is provided with a coupling hole and a keyway that are connected with the active rotating shaft. The four surfaces of the device are respectively provided with threaded holes matched with the electromagnets and connection holes matched with the pressing plate.

Further, one end of the rotating iron core away from the passive rotating body is connected with a reversing end cover arranged on the active rotating shaft, and a commutator is connected on the reversing end cover, and the commutator is connected to the device through a wire. For the electrical connection of the excitation coil windings on each electromagnet, the reversing end cover is connected to the pressure plate set on the rotating iron core relative to the inner side of the rotating iron core, and the pressure plate is used to improve the circuit problem. The commutation end cover improves the wiring problem of the rotating iron core, and connects the wire with the commutator, so that the inner magnetic pole and the outer magnetic pole of each electromagnet group are alternately designed.

Further, the permanent magnet disk is provided with 8 permanent magnet slots arranged in a ring shape, and a permanent magnet matched with the permanent magnet slot is installed in each of the permanent magnet slots.

Further, the wire pressing plate includes a straight plate with a plurality of through holes for matching with the electromagnets, and a wire pressing groove and a plurality of connecting holes are formed on the straight plate.

Further, the reversing end cover is provided with several groups of bosses which are arranged in turn outwardly on the inner side of the rotating iron core, and the end of the reversing end cover is provided with screw holes that cooperate with the active rotating shaft, so The reversing end cover is provided with several groups of connecting pin holes matched with the rotating iron core.

Compared with the prior art, the present invention has the following beneficial effects:

The hybrid excitation eddy current transmission speed regulating device of the present invention combines the advantages of permanent magnet and electric excitation eddy current transmission technology, combines the high power density of permanent magnet transmission and the adjustable magnetic field of electric excitation eddy current transmission, and fully utilizes the advantages of both. Overcome their respective shortcomings and reduce the electrical excitation loss. Through the interaction of high-strength permanent magnet poles, adjustable active rotating body and passive rotating body, torque transmission between the motor and the load through the air gap is realized. They operate independently of each other without mechanical connection; by adjusting the current size of the excitation coil winding and the increase or decrease of the number of energized windings, as well as the air gap at the right end of the rotating iron core, the magnetization and weakening of the air gap magnetic field can be achieved to obtain a wider range. The controllable transmission torque can be obtained to obtain controllable output torque and output power, so as to realize the non-contact adjustment of output torque and output power, which has greater practicability and higher operating efficiency; in addition, the present invention adopts It adopts a drum-type structure, and its working performance is more stable than the traditional disk-type structure. It is mainly composed of an active rotating body and a passive rotating body. The active rotating body is connected to the driving side. It is composed of an adjustable excitation magnet rotor and a rotating iron core. The passive rotating body is composed of a hollow copper tube (copper cylinder) and an iron tube (iron cylinder) connected to the load side. There is an excitation coil winding. Since the active rotating body needs to rotate at a high speed to make the passive rotating body cut the magnetic field line, in order to avoid the cross short circuit of the wire in the high-speed rotation, the circuit will be damaged and the device will not operate normally. To improve the wiring problem, the commutation end cap is used to improve the wiring problem at the right end of the rotating iron core, and the wire is connected to the commutator, so that the inner magnetic pole and the outer magnetic pole of each group are alternately designed. The role of the copper tube is to cut the electromagnetic The magnetic field lines generated by iron generate eddy currents in the copper tube and then generate an anti-inductive magnetic field that interacts with the electromagnetic field, so as to achieve the purpose of contactless transmission of power; the iron tube wraps the copper tube, and the iron tube can increase the magnetic force and stabilize the transmission. the goal of.

Description of drawings:

Fig. 1 is the product structure schematic diagram of the present invention;

Fig. 2 is the enlarged schematic diagram of the partial structure of the product of the present invention;

Fig. 3 is a schematic diagram of the partial structure of the product of the present invention;

Fig. 4 is the partial structural schematic diagram of the product of the present invention;

Fig. 5 is the partial structural schematic diagram of the product of the present invention;

6 is a schematic diagram of the structure of a part of the product of the present invention;

Fig. 7 is the partial structural schematic diagram of the product of the present invention;

Fig. 8 is a schematic diagram of the partial structure of the product of the present invention;

FIG. 9 is a schematic diagram of the magnetic poles of the active rotating body of the present invention.

Detailed ways:

In order to make those skilled in the art better understand the technical scheme of the present invention, the present invention will be further described below in conjunction with the examples:

specific embodiment

It is one of the specific embodiments of the present invention: refer to the accompanying drawings.

In this embodiment, a hybrid excitation eddy current speed regulating device includes an active rotating body 1 and a passive rotating body 2, the active rotating body includes a rotating iron core 3, and the rotating iron core 3 is arranged in an adjustable relative On the active rotating shaft 4 at the distance of the passive rotating body 2, the outer circumferential position of the rotating iron core 3 is surrounded by several groups of electromagnet groups 5 surrounding the rotating iron core 3, and each of the electromagnet groups 5 includes a number of electromagnets. Iron 6, each of the electromagnets 6 is provided with an excitation coil winding 7, and the end position of the rotating iron core 3 relative to the passive rotating body 2 is provided with a permanent magnet disk 8, and the permanent magnet disk 8 is provided with several The permanent magnets 9 with alternately arranged magnetic poles, the passive rotating body 2 includes a passive rotating shaft 11 arranged on the bracket 10 , and the end of the passive rotating shaft 11 relative to the active rotating body 1 is connected with a sleeve that covers the active rotating body 1 . The copper pipe 12 is covered with an iron pipe 13 on the outside, and the active rotating body 1 extends into the copper pipe 12 of the passive rotating body 2 and is not in contact with the inner wall of the copper pipe 12 .

Further, the outer circumferential position of the rotating iron core 3 is surrounded by 4 groups of equidistantly arranged electromagnet groups 5 around the rotating iron core 3, and each group of the electromagnet groups 5 includes 3 equidistantly arranged electromagnets. 6. Each of the electromagnets 6 is provided with an excitation coil winding 7, and the inner magnetic poles and the outer magnetic poles of each electromagnet group 5 are arranged alternately.

Further, the cross-sectional shape of the rotating iron core 3 is an octagon with chamfered corners at the four corners of the square, and the center of the rotating iron core 3 is provided with a coupling hole and a keyway that are connected with the active rotating shaft 4. The four surfaces of the rotating iron core 3 are respectively provided with threaded holes matched with the electromagnet 6 and connection holes matched with the wire pressing plate.

Further, one end of the rotating iron core 3 away from the passive rotating body 2 is connected with a reversing end cover 14 arranged on the active rotating shaft, and a commutator 15 is connected on the reversing end cover 14 . The device 15 is electrically connected to the excitation coil winding 7 provided on each electromagnet 6 through wires, and the reversing end cover 14 is connected to the pressure plate 16 provided on the rotary iron core 3 relative to the inner side of the rotary iron core 3 , use the pressure plate 16 to improve the wiring problem, use the commutation end cover 14 to improve the wiring problem of the rotating iron core 3, and connect the wire with the commutator 15, so that each group of electromagnets has 5 sets of magnetic poles, The outer magnetic poles are alternately designed.

Further, the permanent magnet disk 8 is provided with 8 permanent magnet slots 81 arranged in a ring shape, and each of the permanent magnet slots 81 is provided with a permanent magnet 9 which is respectively matched with the permanent magnet slot 81 .

Further, the wire pressing plate 16 includes a straight plate with a plurality of through holes 161 for cooperating with the electromagnets, and a wire pressing groove 162 and a plurality of connecting holes 163 are formed on the straight plate.

Further, the reversing end cover 14 is provided with several groups of bosses 141 which are arranged in turn outwardly on the inner side of the rotating iron core 3 , and the end of the reversing end cover 14 is provided with a matching with the active rotating shaft 4 . The reversing end cover 14 is provided with several groups of connecting pin holes 143 which are matched with the rotating iron core 3 .

The specific embodiments disclosed in the present invention fall within the protection scope of the claims of the present invention, and are the specific lower-level implementation scope of the characteristic parts of the present invention. The scope is not limited to the protection content of the specific embodiments, and the protection content of the specific embodiments should not be construed as limiting the protection scope of the claims of the present invention.

In addition, the related components of the present invention are not disclosed in the description and the drawings, which does not hinder the understanding of the present invention by those skilled in the art. understand.

The connection relationship of the product structure that falls within the protection scope of the present invention falls into the protection content of the present invention; on the premise of not departing from the protection essence of the present invention, conventional technical improvements are made to the structure of the product components, as in the specific embodiments of the present invention Such improvements to the part structure of the product will also fall within the protection essence of the present invention.

The foregoing has described certain exemplary embodiments of the present invention by way of illustration only, and it is needless to say that those skilled in the art may, without departing from the scope of the invention, Examples are revised. Therefore, the above description is illustrative in nature and should not be construed as limiting the scope of the claims of the present invention.

Unless otherwise defined, all academic and scientific terms used herein have the same meaning as understood by one of ordinary skill in the art to which this invention belongs.

In case of conflict, the definitions in this specification will control.

Claims (7)

1. A hybrid excitation eddy current speed regulating device is characterized in that: comprising an active rotating body, a passive rotating body, the active rotating body includes a rotating iron core, and the rotating iron core is arranged in an adjustable relative passive rotating body spacing On the active rotating shaft, the outer circumferential position of the rotating iron core is surrounded by several groups of electromagnet groups that surround the rotating iron core, each of the electromagnet groups includes a number of electromagnets, and each of the electromagnets is respectively provided with There is an excitation coil winding, the rotating iron core is provided with a permanent magnet disk at the end position relative to the passive rotating body, and a plurality of permanent magnets with alternately arranged magnetic poles are arranged on the permanent magnet disk. The passive rotating shaft is connected with a copper tube covering the active rotating body at the end of the passive rotating shaft relative to the active rotating body. The copper tube is covered with an iron pipe, and the active rotating body extends into the passive rotating body. Inside the copper tube of the rotating body and not in contact with the inner wall of the copper tube. 2. A hybrid excitation eddy current speed regulating device according to claim 1, wherein the outer circumferential position of the rotating iron core is surrounded by 4 groups of equidistantly arranged electromagnet groups around the rotating iron core, each group The electromagnet group includes three equidistantly arranged electromagnets, and each of the electromagnets is provided with excitation coil windings, and the inner magnetic poles and the outer magnetic poles of each group of electromagnet groups are alternately arranged. 3. A hybrid excitation eddy current speed regulating device according to claim 2, characterized in that: the cross-sectional shape of the rotating iron core is an octagon with four corners of a square provided with chamfers, and the center of the rotating iron core is opened There are connecting shaft holes and key grooves which are matched and connected with the active rotating shaft. The four surfaces of the rotating iron core are respectively provided with threaded holes matched with electromagnets and connection holes matched with wire pressing plates. 4 . The hybrid excitation eddy current speed regulating device according to claim 1 , wherein the end of the rotating iron core away from the passive rotating body is connected with a reversing end cover arranged on the active rotating shaft, and the A commutator is connected to the end cover, and the commutator is electrically connected to the excitation coil windings provided on each electromagnet through wires. Clamp connections on the core. 5 . A hybrid excitation eddy current speed regulating device according to claim 1 , wherein the permanent magnet disk is provided with 8 permanent magnet slots arranged in a ring, and each of the permanent magnet slots is provided with a corresponding mating permanent magnets. 6 . The hybrid excitation eddy current speed regulating device according to claim 1 , wherein the pressing plate comprises a straight plate with a plurality of through holes for matching with the electromagnets, and the straight plate is provided with a pressing line. 7 . slot and several connecting holes. 7 . The hybrid excitation eddy current speed control device according to claim 4 , wherein the reversing end cover is provided with several groups of bosses that are arranged in a circle outward in sequence on the inner side of the reversing end cover relative to the rotating iron core. 8 . The end of the reversing end cover is provided with screw holes matched with the active rotating shaft, and several groups of connecting pin holes matched with the rotating iron core are provided on the reversing end cover.

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