CN215990534U - Electromagnetic actuator and electromagnetic vibration control device - Google Patents

Abstract

The utility model provides an electromagnetic actuating mechanism and an electromagnetic vibration control device, which comprise a stator structure, a circumferential conductive structure and a rotor structure, wherein the circumferential conductive structure is used for forming a driving magnetic field for driving the rotor structure to move along a first direction; the rotor structure comprises a rotor body, and the rotor body is provided with a first magnetic part and a second magnetic part which are symmetrically arranged along the first direction. Under the operation state of input current, the driving magnetic field can drive the rotor structure to move along a first direction, so that the vibration output of the electromagnetic actuating mechanism is realized; the first magnetic part and the second magnetic part can magnetize the stator structure, and when the rotor structure deviates from a static balance position due to external disturbance in a non-operation state without current input, a magnetic acting force opposite to the moving direction of the rotor structure can be generated to force the rotor structure to return to the static balance position, so that the automatic balance of the rotor structure in the electromagnetic execution mechanism is realized.

Description

Electromagnetic actuator and electromagnetic vibration control device

Technical Field

The utility model relates to the technical field of vibration control, in particular to an electromagnetic actuating mechanism and an electromagnetic vibration control device.

Background

The operation of the mechanical device generates vibrations that propagate from the mechanical device to the outside and radiate noise to the outside. The main sources of mechanical equipment vibration are internal combustion engines, power pumps and various power and transmission mechanisms, and the vibration of the power and transmission mechanisms is easily coupled with the inherent vibration of the structural system where the power and transmission mechanisms are located, so that the severity of the vibration and noise problem is increased. At the same time, the problems of vibration and noise that arise are becoming more serious with increasing power and speed of the machinery.

At present, the rapid development and engineering application of the vibration active control technology become one of effective means for solving the hazards. In a vibration active control system, an actuator is fixed on a vibration damping object (mechanical equipment), and an excitation electric signal emitted by the control system is converted into dynamic output force so as to counteract the vibration of the vibration damping object. The electromagnetic actuator can generally meet the output force requirements of various application occasions, and has the advantages of high frequency response range, small size and the like, so that the electromagnetic actuator is widely applied.

However, when the conventional electromagnetic actuator is not powered on, the mover of the electromagnetic actuator deviates from the working position under the influence of external vibration, and further subsequent work of the electromagnetic actuator is influenced; in addition, the electromagnetic force applied to the mover of the electromagnetic actuator changes along with the movement of the mover, so that the electromagnetic actuator also has the problem of nonlinear output force, and the actual use effect of the electromagnetic actuator is influenced; meanwhile, the electromagnetic actuator is also light in weight, so that the output force is small, and the use scene needing large output force cannot be met.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art and provides an electromagnetic actuator and an electromagnetic vibration control device, which can realize self-balancing reset of a rotor structure in a non-operation state while ensuring vibration output.

In order to achieve the above object, an electromagnetic actuator is provided, which includes a stator structure, a circumferential conductive structure, and a mover structure, wherein the stator structure is made of soft magnet; the circumferential conductive structure is arranged in the circumferential direction of the stator structure and used for forming a driving magnetic field for driving the rotor structure to move along the first direction, and the first direction is the direction of magnetic induction lines of the driving magnetic field in the stator structure; the rotor structure comprises a rotor body, the rotor body is provided with a first magnetic part and a second magnetic part which are symmetrically arranged along the first direction, and the directions of magnetic induction lines in the first magnetic part and the second magnetic part are opposite and are parallel to the first direction; the first magnetic part and the second magnetic part can magnetize the stator structure to provide a magnetic acting force for keeping the position of the mover structure when the driving magnetic field is not generated.

Optionally, the mover body is provided with two installation parts symmetrically arranged in the first direction, and the two installation parts are respectively used for assembling permanent magnets to form the first magnetic part and the second magnetic part.

Optionally, the mover structure includes at least one pair of the mover bodies arranged in pairs, each pair of the mover bodies is arranged in a circumferential direction of the stator structure and is symmetrical with respect to the stator structure, and each pair of the mover bodies are connected to each other.

Optionally, each pair of the mover bodies is connected through a counterweight structure.

Optionally, the air gap between the stator structure and the mover structure decreases with decreasing magnetic field strength of the driving magnetic field in the first direction.

Optionally, the mover structure forms a first air gap between both sides of the first magnetic portion in the first direction and the stator structure, the first air gap decreasing with decreasing magnetic field strength of the driving magnetic field in the first direction, and the mover structure forms a second air gap between both sides of the second magnetic portion in the first direction and the stator structure, the second air gap decreasing with decreasing magnetic field strength of the driving magnetic field in the first direction.

Optionally, one of the mover structure and the stator structure is provided with an edge on both sides of the first magnetic part along the first direction, the edge being close to the other one along the first direction with the decrease of the magnetic field strength of the driving magnetic field, so as to form the first air gap; one of the rotor structure and the stator structure is provided with an edge which is close to the other one along the first direction along with the reduction of the magnetic field intensity of the driving magnetic field along the first direction on two sides of the second magnetic part along the first direction so as to form the second air gap.

Optionally, the circumferential conductive structure is fixedly connected to the mover body.

Optionally, the circumferential conductive structure is disposed on a fixed frame, a middle mounting groove is disposed in the middle of the mover body, and the circumferential conductive structure and the fixed frame are fixed to the mover body through the middle mounting groove.

Optionally, the mover is further structurally connected with a counterweight structure, and the counterweight structure is provided with an avoiding portion corresponding to the circumferential conductive structure.

Optionally, the electromagnetic actuator further includes a guide structure, the guide structure includes a guide and a moving element engaged with the guide, the guide is disposed along the first direction, and the moving element is connected to the counterweight structure.

Optionally, the electromagnetic actuator includes at least one pair of the guide structures, and each pair of the guide structures is symmetrically disposed with the stator structure as a symmetry center.

Optionally, the counterweight structure is further connected with an elastic resetting structure arranged along the first direction, and is configured to provide an elastic resetting force along the first direction for the mover structure.

Optionally, the electromagnetic actuator includes at least one pair of the elastic reset structures, and each pair of the elastic reset structures is symmetrically disposed with the stator structure as a symmetry center.

The utility model also provides an electromagnetic vibration control device, which comprises the electromagnetic actuating mechanism and a bearing protection mechanism, wherein the electromagnetic actuating mechanism is arranged in the bearing protection mechanism.

The utility model has at least the following beneficial effects:

the utility model provides an electromagnetic actuator and an electromagnetic vibration control device, which are provided with a stator structure of a soft magnet and a rotor structure with a first magnetic part and a second magnetic part, wherein in the operating state of input current, a driving magnetic field can drive the rotor structure to move along a first direction, so that the vibration output of the electromagnetic actuator is realized, and due to an air gap arranged by variable pitch, the change of output force caused by the movement of the rotor structure is reduced, the output force is changed only along with the change of current, so that the accurate control of the output force of the electromagnetic actuator is realized, and particularly when the electromagnetic actuator is applied to vibration control, the effective vibration control on a vibration cancellation object can be realized; under the non-operation state without current input, when external disturbance occurs to enable the rotor structure to deviate from a static balance position, magnetic acting force opposite to the moving direction of the rotor structure can be generated between the rotor structure and the stator structure, the rotor structure is forced to return to the static balance position, and automatic balance of the rotor structure in the electromagnetic execution mechanism is achieved.

Drawings

Fig. 1 shows a schematic view of an electromagnetic actuator according to the utility model arranged in a load protection mechanism.

Fig. 2 schematically shows the top cover and the side wall of fig. 1 with the top cover and the side wall removed.

Fig. 3 exemplarily shows a front view of fig. 1.

Fig. 4 schematically shows a top view of fig. 1.

Fig. 5 schematically shows a top view of fig. 1 with the top cover removed.

Fig. 6 exemplarily shows a sectional view taken along a-a of fig. 3.

Fig. 7 exemplarily shows a sectional view taken along B-B of fig. 4.

Fig. 8 exemplarily shows a sectional view taken along line C-C of fig. 5.

In the figure: 1. the stator structure 2, the mover structure 21, the mover body 211, the first wedge-shaped bevel edge 212, the second wedge-shaped bevel edge 213, the third wedge-shaped bevel edge 214, the fourth wedge-shaped bevel edge 22, the first magnetic part 23, the second magnetic part 3, the circumferential conductive structure 31, the fixing frame 32, the conductive coil 4, the counterweight structure 41, the first counterweight 42, the second counterweight 5, the guide structure 51, the guide member 52, the moving member 6, the elastic reset structure 61, the elastic member 62, the elastic member positioning seat 7, the bearing protection mechanism 71, the base 72, the side wall 73 and the top cover.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 8, the present embodiment provides an electromagnetic actuator, which includes a stator structure 1, a mover structure 2, and a circumferential conductive structure 3. When current is introduced into the circumferential conductive structure 3, a driving magnetic field can be generated, and the driving magnetic field can drive the rotor structure 2 to move.

Wherein, stator structure 1 is made by soft magnet, if adopt silicon steel sheet coincide to form, circumference conducting structure 3 set up in stator structure 1's circumference, specifically, circumference conducting structure 3 includes along the circular telegram wire that stator structure 1's circumference set up. The stator structure 1 located in the middle of the circumferential conductive structure 3 can increase the magnetic flux in the middle of the circumferential conductive structure 3, so that the driving magnetic field can be strengthened.

In the following embodiments, the direction of the magnetic induction lines defining the driving magnetic field within the stator structure 1 is a first direction. Specifically, the vertical direction in fig. 6 is the first direction.

The rotor structure 2 is arranged at least one side of the stator structure 1, so that the driving magnetic field can drive the rotor structure 2 to move. The mover structure 2 includes a mover body 21, and the mover body 21 has a first magnetic part 22 and a second magnetic part 23 symmetrically disposed along the first direction. The symmetrical arrangement along the first direction means that a connecting line between the centers of the first magnetic part 22 and the second magnetic part 23 is parallel to the first direction, and the first magnetic part 22 and the second magnetic part 23 are symmetrically arranged on the mover body 21.

In some embodiments, the mover body 21 is made of soft magnetic material, such as silicon steel sheets, and is provided with two mounting portions, the two mounting portions are used for assembling permanent magnets to form the first magnetic portion 22 and the second magnetic portion 23, and the two mounting portions are symmetrically arranged on the mover body 21 along the first direction.

Specifically, referring to fig. 2 and 6, the vertical direction in fig. 6 is the direction of the magnetic induction lines of the driving magnetic field in the stator structure 1 (that is, the first direction is the vertical direction), the mover body 21 is provided with two upper and lower mounting grooves as mounting portions, the two upper and lower mounting grooves are respectively disposed in a shape similar to the first permanent magnet and the second permanent magnet, the upper mounting groove is used for embedding the first permanent magnet to form the first magnetic portion 22, and the lower mounting groove is used for embedding the second permanent magnet to form the second magnetic portion 23. Wherein the magnetic field strength of the first permanent magnet and the magnetic field strength of the second permanent magnet are the same. The connecting line of the centers of the upper and lower mounting grooves is parallel to the vertical direction, the upper and lower mounting grooves are vertically symmetrically arranged about the middle separation line of the rotor body 21, and the middle separation line is perpendicular to the first direction.

The magnetic induction lines in the first magnetic part 22 and the magnetic induction lines in the second magnetic part 23 are opposite in direction and are parallel to the first direction, that is, the magnetic induction lines generated in the first magnetic part 22 by the first magnetic part 22 due to its own magnetism are opposite in direction to the magnetic induction lines generated in the second magnetic part 23 by the second magnetic part 23 due to its own magnetism, and both directions are parallel to the first direction.

Specifically, referring to fig. 6, the first permanent magnet for forming the first magnetic part 22 has an N pole on the upper side and an S pole on the lower side, and the second permanent magnet for forming the second magnetic part 23 has an S pole on the upper side and an N pole on the lower side, and polarities of the first and second permanent magnets are opposite in a vertical direction (i.e., the first direction), so that magnetic induction lines in the first and second permanent magnets are opposite in direction and parallel to the first direction.

When a variable current is applied to the circumferential conductive structure 3, the driving magnetic field is generated, and the first magnetic part 22 and the second magnetic part 23 symmetrically arranged in the first direction are opposite in magnetic field direction, so that a component force perpendicular to the first direction generated by the driving magnetic field is balanced, and only a magnetic field force for driving the mover structure 2 to move up and down in the first direction is generated, so that the mover structure 2 moves up and down in the first direction and vibration output is realized.

Also, since the stator structure 1 is made of soft magnetic material, the first magnetic part 22 and the second magnetic part 23 can magnetize the stator structure 1 and form a magnetic force to maintain the position of the mover structure 2. Therefore, when no current is applied to the circumferential conductive structure 3, that is, when the driving magnetic field is not generated, if the electromagnetic actuator is disturbed by external vibration, the mover structure 2 is displaced relative to the stator structure 1, and the magnetic acting force applied to the stator structure 1 by the first magnetic part 22 and the second magnetic part 23 can cause the mover structure 2 to generate a movement tendency of returning to an initial static equilibrium position, thereby achieving self-balancing reset of the mover structure 2.

In some embodiments, the mover structure 2 may include at least one pair of the mover bodies 21 arranged in pairs, each pair of the mover bodies 21 is arranged in a circumferential direction of the stator structure 1 and is axisymmetric with respect to the stator structure 1, and each pair of the mover bodies 21 are connected to each other; more conveniently, all mover bodies 21 may be interconnected, for example, the mover bodies 21 are respectively connected to a counterweight structure 4, so that the interconnection between the mover bodies 21 is realized by the counterweight structure 4. Therefore, the mover bodies 21 are symmetrically arranged in pairs in the circumferential direction of the stator structure 1, and therefore, the component force generated by the driving magnetic field in the direction perpendicular to the first direction can be more balanced. Taking fig. 6 as an example, when the first magnetic part 22 of the left mover body 21 in fig. 6 is subjected to the magnetic force directed to the upper left, the first magnetic part 22 of the right mover body 21 in fig. 6 is subjected to the magnetic force directed to the upper right, so that the magnetic force in the horizontal direction (i.e. the component force perpendicular to the first direction) can be balanced, and the motion stability of the mover structure 2 can be optimized.

Therefore, according to the present invention, by providing the stator structure 1 made of soft magnetic material and the mover structure 2 having the first magnetic part 22 and the second magnetic part 23, when a current is input, the driving magnetic field can drive the mover structure 2 to move in a first direction, so as to achieve a vibration output of the electromagnetic actuator; in addition, under the condition of no current input, when external disturbance occurs to make the rotor structure 2 deviate from a static balance position, a magnetic acting force opposite to the moving direction of the rotor structure 2 is generated between the rotor structure 2 and the stator structure 1 to force the rotor structure 2 to return to the static balance position, and thus, the automatic balance reset of the rotor structure 2 in the electromagnetic actuator is realized.

In some embodiments, referring to fig. 6, the air gap between the stator structure 1 and the mover structure 2 decreases with decreasing magnetic field strength of the driving magnetic field in the first direction.

Further, the mover structure 2 forms a first air gap between both sides of the first magnetic part 22 in the first direction and the stator structure 1, the first air gap decreasing with a decrease in the magnetic field strength of the driving magnetic field in the first direction, and the mover structure 2 forms a second air gap between both sides of the second magnetic part 23 in the first direction and the stator structure 1, the second air gap decreasing with a decrease in the magnetic field strength of the driving magnetic field in the first direction.

Specifically, one of the mover structure 2 and the stator structure 1 is provided with an edge on both sides of the first magnetic part 22 in the first direction that is closer to the other one as the magnetic field strength of the driving magnetic field decreases in the first direction to form the first air gap that decreases as the magnetic field strength of the driving magnetic field decreases in the first direction; one of the mover structure 2 and the stator structure 1 is provided with an edge on both sides of the second magnetic portion 23 in the first direction, the edge being closer to the other one with a decrease in the magnetic field strength of the driving magnetic field in the first direction, so as to form the second air gap that decreases with a decrease in the magnetic field strength of the driving magnetic field in the first direction.

For example, referring to fig. 6, the vertical direction in fig. 6 is the first direction, at the position of the first magnetic part 22 formed by the first permanent magnet, the first magnetic part 22 gradually moves away from the end of the stator structure 1 upwards, so that the magnetic field strength of the driving magnetic field upwards from the first magnetic part 22 decreases, and thus the edge of the mover structure 2 upwards from the first magnetic part 22 gradually approaches the stator structure 1, forming a first wedge-shaped oblique side 211. And downward from the first magnetic part 22 will also gradually get away from the end of the stator structure 1, so that the magnetic field strength of the driving magnetic field downward from the first magnetic part 22 will decrease, and thus the edge of the mover structure 2 downward from the first magnetic part 22 gradually gets closer to the stator structure 1, forming a first wedge-shaped oblique side 212. Thereby, first air gaps that decrease in the vertical direction (i.e., the first direction) with a decrease in the magnetic field strength of the driving magnetic field are formed on both upper and lower sides (i.e., both sides in the first direction) of the first magnetic part 22.

Likewise, at the position of the second magnetic part 23 formed by the second permanent magnet, the second magnetic part 23 gradually moves away from the end of the stator structure 1 upwards, so that the magnetic field strength of the driving magnetic field upwards from the second magnetic part 23 decreases, and thus the edge of the mover structure 2 gradually approaches the stator structure 1 upwards from the second magnetic part 23, forming a first wedge-shaped inclined edge 213. And downward from the second magnetic part 23 will also gradually get away from the end of the stator structure 1, so that the magnetic field strength of the driving magnetic field downward from the second magnetic part 23 will decrease, and thus the edge of the mover structure 2 downward from the second magnetic part 23 gradually gets closer to the stator structure 1, forming a first wedge-shaped inclined edge 214. Thereby, second air gaps that decrease in the vertical direction (i.e., the first direction) with a decrease in the magnetic field strength of the driving magnetic field are formed on both upper and lower sides (i.e., both sides in the first direction) of the second magnetic part 23.

It can be understood that, edges (such as wedge-shaped oblique edges) close to the mover structure 2 may also be respectively disposed at corresponding positions of the stator structure 1 to form the first air gap and the second air gap that decrease with the decrease of the magnetic field strength of the driving magnetic field, and the principle and the arrangement manner of the first air gap and the second air gap are the same as those described in the foregoing embodiments, and are not described again in this embodiment.

Therefore, according to the utility model, the air gap between the rotor structure 2 and the stator structure 1 is arranged in a variable pitch manner, so that the air gap is reduced along with the reduction of the magnetic field intensity of the driving magnetic field along the first direction, the magnetic acting force applied to the rotor structure 2 can be kept unchanged due to the reduction of the air gap at the position where the magnetic field intensity of the driving magnetic field is reduced, the defect that the magnitude of the electromagnetic output force can be changed along with the displacement of the rotor structure 2 is overcome, the electromagnetic actuating mechanism can output the acting force with the same magnitude under the excitation of the current with the same magnitude, and the controllability and the output stability of the electromagnetic actuating mechanism are ensured.

In some embodiments, the circumferential conductive structure 3 is fixedly connected with the mover body 21 to increase the mass of the mover body 21.

Specifically, referring to fig. 6 and 7, the circumferential conductive structure 3 is a conductive coil 32, the conductive coil 32 is wound on a fixing frame 31, and a middle mounting groove is formed in the middle of the mover body 21 for mounting the conductive coil 32 and the fixing frame 31, so that the conductive coil 32 can be fixed to the mover body 21. For example, the fixing frame 31 is embedded in the middle mounting groove together with the conductive coil 32. In addition, in this embodiment, since the conductive coil 32 is embedded in the middle mounting groove, that is, located at the middle position of the mover body 21, the first magnetic part 22 and the second magnetic part 23 are symmetric with respect to the conductive coil 32 along the first direction, so that stable driving of the mover structure 2 can be better ensured.

Therefore, according to the utility model, the circumferential conductive structure 3 is fixedly connected with the mover body 21, so that the mass of the mover structure 2 is increased, and the reduction of the counter weight and the increase of the output force of the electromagnetic actuator are facilitated.

In a further embodiment, referring to fig. 7, in order to further increase the mass of the mover body 21 and thus enhance the output force of the electromagnetic actuator, a counterweight structure 4 is further connected to the mover structure 2, for example, the mover structure 2 and the counterweight structure 4 are detachably connected by bolts, and the counterweight structure 4 is provided with an avoiding portion, for example, an avoiding groove, corresponding to the circumferential conductive structure 3, and the avoiding portion is used for avoiding the circumferential conductive structure 3 so as to prevent the circumferential conductive structure 3 from being obstructed along the circumferential direction of the stator structure 1.

Therefore, the counterweight structure 4 is arranged on the mover body 21, so that the output force of the electromagnetic actuator can be further increased, and the counterweight structures 4 with different weights can be assembled according to requirements, so as to meet the requirements of different output forces.

In some embodiments, a guiding structure 5 is coupled to the mover structure 2, and the guiding structure 5 is configured to provide guidance for the movement of the mover structure 2 along the first direction.

Further, the guiding structure 5 includes a guiding element 51 and a moving element 52 engaged with the guiding element 51, the guiding element 51 is disposed along the first direction, and the moving element 52 is directly or indirectly connected to the mover body 21 to provide guidance for the movement of the mover structure 2 along the first direction.

Specifically, referring to fig. 2, 7 and 8, the weight structure 4 and the guide structure 5 are coupled to the mover structure 2. Wherein, the counterweight structure 4 includes first counterweight 41 and second counterweight 42 that link to each other, first counterweight 41 compare in second counterweight 42 is close to mover body 21, just be equipped with on the first counterweight 41 and be used for dodging the portion of dodging of circumference conducting structure 3. The guide structure 5 includes a linear bearing (i.e., a guide 51) and a guide post (i.e., a moving member 52) engaged with the linear bearing, the linear bearing is disposed along the first direction, and the guide post is fixedly connected to the second weight member 42 by a bolt.

In a further embodiment, in order to enable the mover structure 2 to return to the initial position better after being driven by the driving magnetic field or after being disturbed by the outside, an elastic restoring structure 6 is further directly or indirectly connected to the mover body 21, and the elastic restoring structure 6 is disposed along the first direction to provide an elastic restoring force to the mover structure 2 along the first direction.

Specifically, referring to fig. 8, an elastic member 61 and an elastic member positioning seat 62, such as a cylindrical spring and a spring seat, are further connected to the second counterweight member 42 of the counterweight structure 4 connected to the mover body 21, and the spring seat is fixed to a base 71, and the cylindrical spring is disposed between the second counterweight member 42 and the spring seat in the vertical direction (i.e., the first direction) and is used for providing an elastic restoring force in the vertical direction to the counterweight structure 4 and the mover structure 2.

The guide structures 5 and the elastic reset structures 6 may be respectively disposed in pairs, that is, the electromagnetic actuator includes at least one pair of the guide structures 5 and/or at least one pair of the elastic reset members, and each pair of the guide structures 5 and each pair of the elastic reset structures 6 are symmetrically disposed with the stator structure 1 as a center of symmetry, so as to better ensure a guiding and/or elastic reset effect.

Specifically, referring to fig. 2, the second weight member 42 is a hollow rectangular structure, the hollow portion of the rectangular structure is used for accommodating the stator structure 1, the mover structure 2 and the first weight member 41, and the stator structure 1 is located in the hollow portion of the middle portion of the second weight member 42, so that a compact layout is formed, and the size of the electromagnetic actuator is reduced. And a pair of the elastic restoring structures 6 is arranged at one pair of opposite corners of the second counterweight 42, and the guide structures 5 are arranged at the other pair of opposite corners of the second counterweight 42.

It is understood that in other embodiments, the second weight member 42 may be provided in other shapes than a hollow rectangular structure, such as a ring shape, etc., and the guiding structure 5 and/or the elastic restoring structure 6 may also be provided in two pairs, three pairs, four pairs, or other numbers, etc., to achieve the guiding and/or restoring effect on the mover structure 2.

Therefore, the guide structure 5 is arranged to help ensure the movement direction of the rotor structure 2, and the elastic reset structure 6 is further arranged to help realize the flexible reset of the rotor structure 2, so that the rotor structure 2 can be more conveniently and flexibly reset to the initial static balance position in the self-balancing process that a driving magnetic field is not generated and is disturbed by the outside and the vibration process under the action of the driving magnetic field.

Referring to fig. 1 to 8, the present embodiment further provides an electromagnetic vibration control device, which includes the electromagnetic actuator and a load protection mechanism 7, where the electromagnetic actuator is disposed in the load protection mechanism 7.

In some embodiments, as shown in fig. 1 to 5, the load protection mechanism 7 includes a base 71, a side wall 72, and a top cover 73, the electromagnetic actuator is mounted on the base 71, and the base 71, the side wall 72, and the top cover 73 enclose a receiving space for receiving the electromagnetic actuator.

Specifically, referring to fig. 6, the stator structure 1 is connected to the middle of the base 71 by bolts or other connection methods, the mover structures 2 are symmetrically arranged around the stator structure 1, the mover structures 2 are connected by a counterweight structure 4, and the circumferential conductive structure 3 is fixed to the mover structures 2. Meanwhile, as shown in fig. 7, an avoiding portion is disposed at a position corresponding to the circumferential conductive structure 3 on the counterweight structure 4, as shown in fig. 8, a guide structure 5 and an elastic reset structure 6 are connected to the counterweight structure 4, the guide 51 of the guide structure 5 is fixed to the base 71, and the elastic positioning seat 62 of the elastic reset structure 6 is fixed to the base 71. Referring to fig. 1 and 2, the side wall 72 is connected to the base 71 and located on the circumferential outer side of the electromagnetic actuator, and the top cover 73 is connected to the side wall 72 and located on the top of the side wall 72. Therefore, the base 71, the side wall 72 and the top cover 73 enclose an accommodating space, so that the influence of the outside on the electromagnetic actuating mechanism is reduced, and the electromagnetic actuating mechanism is protected.

It is understood that, the specific structural configuration and principle of the electromagnetic actuator in the above embodiments can be applied to the electromagnetic vibration control device in this embodiment, and the specific technical effects achieved by the electromagnetic actuator are also the same, and are not described in detail in this embodiment.

When the electromagnetic vibration control device is used, the electromagnetic vibration control device is fixed on a small vibration elimination object, for example, a power unit of a ship through the base 71, then a variable current is introduced into the circumferential conductive structure 3 to form a variable driving magnetic field, so that a magnetic field in an air gap between the rotor structure 2 and the stator structure 1 is changed, the rotor structure 2 moves up and down along the first direction under the action of the driving magnetic field, the accuracy, the stability and the fluency of the rotor structure 2 during movement are improved through the guide structure 5 and the elastic reset structure 6, and the rotor structure 2 of the electromagnetic execution mechanism outputs vibration to the base 71 through the up and down movement along the first direction and transmits the vibration to the vibration elimination object through the base 71, so that the vibration control of the vibration elimination object is realized.

As described above, in the electromagnetic actuator and the electromagnetic vibration control device according to the present invention, the stator structure 1 made of soft magnetic material and the mover structure 2 having the first magnetic portion 22 and the second magnetic portion 23 are provided, and in an operating state where a current is input, the generated driving magnetic field can drive the mover structure 2 to move in the first direction, so that a vibration output of the electromagnetic actuator is realized, and a variation in an output force due to the movement of the mover structure 2 is reduced by an air gap provided by a variable pitch, and the output force varies only with a variation in the current, so that an accurate control of the output force of the electromagnetic actuator is realized; meanwhile, in a non-operation state without current input, when external disturbance occurs to cause the rotor structure 2 to deviate from a static balance position, a magnetic acting force opposite to the moving direction of the rotor structure 2 is generated between the stator structure 1 and the rotor structure 2 to force the rotor structure 2 to recover to the static balance position, so that automatic balance reset of the rotor structure 2 is realized; particularly, when the vibration control device is applied to vibration control, such as vibration control of a ship, effective vibration control of a vibration damping object can be realized, resonance of vibration of the vibration damping object and the structure of a system where the vibration damping object is located is prevented, and noise can be reduced based on the vibration control.

Claims (15)

1. An electromagnetic actuator is characterized by comprising a stator structure, a circumferential conductive structure and a rotor structure, wherein,

the stator structure is made of soft magnet;

the circumferential conductive structure is arranged in the circumferential direction of the stator structure and used for forming a driving magnetic field for driving the rotor structure to move along a first direction, and the first direction is the direction of magnetic induction lines of the driving magnetic field in the stator structure;

the rotor structure comprises a rotor body, the rotor body is provided with a first magnetic part and a second magnetic part which are symmetrically arranged along the first direction, and the directions of magnetic induction lines in the first magnetic part and the second magnetic part are opposite and are parallel to the first direction; the first magnetic part and the second magnetic part can magnetize the stator structure to provide a magnetic acting force for keeping the position of the mover structure when the driving magnetic field is not generated.

2. The electromagnetic actuator according to claim 1, wherein the mover body is provided with two mounting portions symmetrically arranged in the first direction, and the two mounting portions are respectively used for mounting permanent magnets to form the first magnetic portion and the second magnetic portion.

3. The electromagnetic actuator of claim 1, wherein the mover structure includes at least one pair of the mover bodies arranged in pairs, each pair of the mover bodies being arranged circumferentially of and symmetrically about the stator structure, and each pair of the mover bodies being interconnected.

4. The electromagnetic actuator of claim 3, wherein each pair of the mover bodies are coupled by a counterweight structure.

5. The electromagnetic actuator of claim 1, wherein the air gap between the stator structure and the mover structure decreases in the first direction as the strength of the drive magnetic field decreases.

6. The electromagnetic actuator of claim 5, wherein the mover structure forms a first air gap between both sides of the first magnetic portion in the first direction and the stator structure, the first air gap decreasing with decreasing magnetic field strength of the driving magnetic field in the first direction, and forms a second air gap between both sides of the second magnetic portion in the first direction and the stator structure, the second air gap decreasing with decreasing magnetic field strength of the driving magnetic field in the first direction.

7. The electromagnetic actuator of claim 6,

one of the rotor structure and the stator structure is provided with an edge which is close to the other one along the first direction along with the reduction of the magnetic field intensity of the driving magnetic field along the first direction at two sides of the first magnetic part along the first direction so as to form the first air gap;

one of the rotor structure and the stator structure is provided with an edge which is close to the other one along the first direction along with the reduction of the magnetic field intensity of the driving magnetic field along the first direction on two sides of the second magnetic part along the first direction so as to form the second air gap.

8. The electromagnetic actuator of claim 1, wherein the circumferential conductive structure is fixedly coupled to the mover body.

9. The electromagnetic actuator according to claim 8, wherein the circumferential conductive structure is disposed on a fixed frame, a middle mounting groove is disposed in a middle portion of the mover body, and the circumferential conductive structure and the fixed frame are fixed to the mover body through the middle mounting groove.

10. The electromagnetic actuator according to claim 8, wherein a counterweight structure is further connected to the mover structure, and the counterweight structure is provided with an escape portion corresponding to the circumferential conductive structure.

11. The electromagnetic actuator of claim 4 or 10, further comprising a guide structure including a guide member and a moving member engaged with the guide member, the guide member being disposed along the first direction, the moving member being coupled to the counterweight structure.

12. The electromagnetic actuator of claim 11, wherein the electromagnetic actuator includes at least one pair of the guide structures, each pair of the guide structures being symmetrically disposed about the stator structure.

13. The electromagnetic actuator of claim 11, wherein the weight structure further includes an elastic restoring structure disposed along the first direction, and configured to provide an elastic restoring force along the first direction to the mover structure.

14. The electromagnetic actuator of claim 13, wherein the electromagnetic actuator includes at least one pair of the resilient return structures, each pair of the resilient return structures being symmetrically disposed about the stator structure.

15. An electromagnetic vibration control device, comprising:

the electromagnetic actuator of any one of claims 1-14; and

and the electromagnetic executing mechanism is arranged in the bearing protection mechanism.

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