CN112994398A

CN112994398A - Strong electromagnetic vibrator

Info

Publication number: CN112994398A
Application number: CN202110253152.2A
Authority: CN
Inventors: 张文谦; 薛欢; 李靖
Original assignee: Hubei University of Technology
Current assignee: Hubei University of Technology
Priority date: 2021-03-04
Filing date: 2021-03-04
Publication date: 2021-06-18
Anticipated expiration: 2041-03-04
Also published as: CN112994398B

Abstract

The invention provides a powerful electromagnetic vibrator, comprising: the vibration device comprises a base, a vibration body, an electromagnetic excitation device and a vibration head, wherein the vibration body is movably arranged in the base; the electromagnetic excitation device is arranged in the base at two sides of the vibration body; the vibrating head is fixedly arranged at the end part of the vibrating body and is positioned outside the base; when the superposed magnetic field generated by the two electromagnetic excitation devices after being electrified acts on the vibration body, the vibration body can drive the vibration head to do linear reciprocating motion. The invention adopts the coil and the reversible electromagnet to form an upper group of excitation devices and a lower group of excitation devices, and the two groups of excitation devices act on the middle permanent magnet in a cooperative manner, so that the middle permanent magnet reciprocates up and down to drive the vibrating head to reciprocate up and down.

Description

Strong electromagnetic vibrator

Technical Field

The invention relates to the technical field of vibrators, in particular to a powerful electromagnetic vibrator.

Background

In many places, such as various ore dressing screening, leisure and entertainment, vibration aging of mechanical parts and the like, a mechanical vibration mode is widely adopted for vibration screening of alternative ore materials, vibration shaking for comfort and leisure or massage, vibration excitation of mechanical parts for finishing aging treatment and residual stress elimination and the like. The traditional electromagnetic vibrator has the problems of insufficient electromagnetic bearing and thrust or overhigh energy consumption caused by overlarge electromagnetic coil.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. To this end, the present invention provides a powerful electromagnetic vibrator, comprising:

a base (1);

the vibrating body (2), the vibrating body (2) is movably arranged in the base (1);

the electromagnetic excitation device (3) is fixedly arranged in the base (1) on two sides of the vibration body (2);

the vibrating head (4), the said vibrating head (4) is fixed to the end of the said vibration body (2);

when a superposed magnetic field generated after the two electromagnetic excitation devices (3) are electrified acts on the vibration body (2), the vibration body (2) can drive the vibration head (4) to do linear reciprocating motion.

Furthermore, the vibration body (2) comprises a vibration body (21), a permanent magnet (22) and a guide body (23), the vibration body (21) is fixedly sleeved on the middle part of the guide body (23), the permanent magnet (22) is fixedly arranged on the vibration body (21), and the vibration head (4) is fixedly arranged at the end part of the guide body (23).

Further, the permanent magnet (22) is made of neodymium iron boron.

Furthermore, the electromagnetic excitation device (3) comprises an installation framework (31) fixedly arranged in the base, a reversible electromagnet (34) arranged on the installation framework (31), and a coil (35) wound on the installation framework (31), wherein the installation framework (31) is positioned near the vibrating body (21), the reversible electromagnet (34) is positioned in the coil (35), and the coils (35) positioned at two sides of the vibrating body (21) are connected with currents in opposite directions.

Furthermore, be provided with reversible electromagnet mounting groove (32), set up on installation skeleton (31) coil winding space (33) in the reversible electromagnet mounting groove (32) outside, the cross-section of coil winding space (33) is the annular cross-section of rectangle, the coil sets up in the coil winding space.

Further, the reversible electromagnet (34) is made of alnico.

Furthermore, a buffer (5) is arranged between the vibrating head (4) and the base (1).

The invention adopts a coil and a reversible electromagnet to form an upper group of excitation devices and a lower group of excitation devices, the reversible electromagnet is a magnet which can change the magnetic pole direction along with the change of the electrifying current direction of the coil, the current in the opposite direction is conducted between the upper coil positioned above the permanent magnet and the lower coil positioned below the permanent magnet, the direction of the generated magnetic field is opposite, meanwhile, the direction of the magnetic field generated by the reversible electromagnet corresponding to the upper coil is the same as that of the magnetic field generated by the upper coil through the excitation of the coil, and the direction of the magnetic field generated by the reversible electromagnet corresponding to the lower coil is the same as that of the magnetic field generated by the lower coil, therefore, when one group of excitation devices generates electromagnetic attraction force to act on the middle permanent magnet, the other group of excitation devices generates electromagnetic thrust force in the same direction as the electromagnetic attraction force to act on the middle permanent magnet, and the two groups of excitation devices act, the middle permanent magnet reciprocates up and down to drive the vibrating head to reciprocate up and down, and under the condition of the same power consumption, the vibrating head provides larger vibrating force than a conventional electromagnetic vibrator, so that the effect of reducing the energy consumption is achieved.

Drawings

FIG. 1 is a schematic diagram of a falling structure of a vibration head of a powerful electromagnetic vibrator provided in the present invention;

FIG. 2 is a schematic diagram of a structure of the present invention for lifting the vibration head of a powerful electromagnetic vibrator;

FIG. 3 is a schematic longitudinal cross-sectional view of a mounting frame provided by the present invention;

FIG. 4 is a schematic top view of the mounting frame provided by the present invention;

FIG. 5 is a schematic top view of a reversible electromagnet according to the present invention mounted within a mounting frame;

wherein, 1, a base; 2. vibrating the body; 21. a vibrating body; 22. a permanent magnet; 23. a guide body; 3. an electromagnetic excitation device; 31. installing a framework; 32. a reversible electromagnet mounting groove; 33. a coil winding space; 34. a reversible electromagnet; 35. a coil; 4. a vibrating head; 5. a buffer member; 6. a shock pad; 7. and a guide sleeve.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can, for example, be fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 to 5, the present invention provides a powerful electromagnetic vibrator, including: the vibration device comprises a base 1, a vibration body 2, an electromagnetic excitation device 3 and a vibration head 4, wherein the vibration body 2 is movably arranged in the base 1; the electromagnetic excitation device 3 is fixedly arranged in the base 1 at two sides of the vibration body 2; the vibrating head 4 is fixedly arranged at the end part of the vibrating body 2, and the vibrating head 4 is positioned outside the base 1; when the superposed magnetic field generated by the two electromagnetic excitation devices 3 after being electrified acts on the vibration body 2, the vibration body 2 can drive the vibration head 4 to do linear reciprocating motion.

Further, the vibrating body 2 comprises a vibrating body 21, a permanent magnet 22 and a guide body 23, the vibrating body 21 is fixedly sleeved in the middle of the guide body 23, the permanent magnet 22 is fixedly arranged on the vibrating body 21, and the vibrating head 4 is fixedly arranged at the end of the guide body 23; the permanent magnet 22 is made of neodymium iron boron. Specifically, the cross section of the guide body 23 is circular or rectangular, and the middle part of the vibrating body 21 is provided with a fixing hole matched with the guide body 23, so that the vibrating body is fixedly sleeved on the guide body; the vibrator is provided with a plurality of permanent magnets which are annularly distributed on the vibrator.

Further, the electromagnetic excitation device 3 includes a mounting frame 31 fixedly disposed in the base, a reversible electromagnet 34 disposed on the mounting frame 31, and a coil 35 wound around the mounting frame 31, wherein the mounting frame 31 is located near the vibrator 21, the reversible electromagnet 34 is located in the coil 35, and the coils 35 located on both sides of the vibrator 21 are supplied with currents in opposite directions. Specifically, the mounting frame 31 is provided with a reversible electromagnet mounting groove 32 and a coil winding space 33 disposed outside the reversible electromagnet mounting groove 32, the section of the coil winding space 33 is a rectangular annular section, the coil is disposed in the coil winding space, and the coil winding space can adopt a structure of overlapping silicon steel sheets to reduce eddy current, so as to reduce energy loss caused by the eddy current; as shown in fig. 5, the reversible electromagnet mounting groove 32 is annular, the reversible electromagnets 34 are annularly distributed in the reversible electromagnet mounting groove 32, and the reversible electromagnets 34 are made of alnico. The magnet material with medium coercive force such as alnico has the advantages of high remanence (up to 1.35T) and the defects of very low intrinsic coercive force (usually less than 160kA/m), non-linear demagnetization curve and non-coincidence of a return line and a demagnetization curve, so the advantages and the disadvantages of the alnico magnet are fully utilized, the directions of the magnetic fields generated by the upper coil and the lower coil are continuously changed by continuously changing the current directions of the upper coil positioned above the permanent magnet and the lower coil positioned below the permanent magnet, the directions of the magnetic fields generated by the upper coil and the lower coil are opposite, meanwhile, the direction of the magnetic field generated by the reversible electromagnet corresponding to the upper coil is the same as the direction of the magnetic field generated by the upper coil, and the direction of the magnetic field generated by the reversible electromagnet corresponding to the lower coil is the same as the direction of the magnetic field generated by the lower coil, therefore, when one group of the excitation devices generates electromagnetic attraction to act on the middle permanent magnet, the other group of the excitation devices generates electromagnetic thrust in the same direction as the electromagnetic attraction to act on the middle permanent magnet, and the electromagnetic forces generated by the two groups of the excitation devices act on the middle permanent magnet in a synergistic manner, so that the middle permanent magnet reciprocates up and down to drive the vibrating head to reciprocate up and down, and under the condition of the same electric energy consumption, the electromagnetic vibrator provides larger vibrating force than that of a conventional electromagnetic vibrator; as shown in fig. 1, the excitation devices above the permanent magnets generate downward electromagnetic thrust to act on the permanent magnets, the excitation devices below the permanent magnets generate downward electromagnetic attraction to act on the permanent magnets, and the electromagnetic forces generated by the two groups of excitation devices act on the permanent magnets in the middle in a cooperative manner, so that the vibration head is kept in a falling state; as shown in fig. 2, by changing the direction of the current, the upper excitation device generates an upward electromagnetic attraction to act on the permanent magnet, the lower excitation device generates an upward electromagnetic thrust to act on the permanent magnet, the electromagnetic forces generated by the two excitation devices act on the middle permanent magnet in a cooperative manner, so that the vibration head keeps a lifted state, and by continuously changing the direction of the coil to connect the current, the vibration head is continuously switched between a falling state and a lifted state, thereby achieving the purpose of frequently vibrating.

Further, a buffer piece 5 is arranged between the vibration head 4 and the base 1, and the buffer piece can be a buffer cushion block or a buffer spring so as to reduce impact and noise generated in the motion process of the impact head. Specifically, the guide body 23 is further provided with a shock absorption pad 6 to reduce the vibration generated in the upward movement process of the guide body; specifically, as shown in fig. 2, the guide device further comprises a guide sleeve 7, a mounting seat is arranged in the base 1, the mounting framework is mounted in the mounting seat, the guide sleeve is arranged in the middle of the mounting seat, and the mounting seat is sleeved on the guide body through the guide sleeve, so that the guide body can slide up and down more smoothly.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A powerful electromagnetic vibrator, comprising:

a base (1);

2. The powerful electromagnetic vibrator according to claim 1, wherein the vibrating body (2) comprises a vibrating body (21), a permanent magnet (22) and a guide body (23), the vibrating body (21) is fixedly sleeved on the middle portion of the guide body (23), the permanent magnet (22) is fixedly arranged on the vibrating body (21), and the vibrating head (4) is fixedly arranged at the end portion of the guide body (23).

3. The powerful electromagnetic vibrator according to claim 2, characterized in that the permanent magnet (22) is made of neodymium iron boron.

4. The powerful electromagnetic vibrator according to claim 2, wherein the electromagnetic excitation device (3) includes a mounting frame (31) fixedly disposed in the base, a reversible electromagnet (34) disposed on the mounting frame (31), and a coil (35) wound around the mounting frame (31), the mounting frame (31) is located near the vibrator (21), the reversible electromagnet (34) is located in the coil (35), and the coils (35) located on both sides of the vibrator (21) are turned on with currents in opposite directions.

5. The powerful electromagnetic vibrator according to claim 4, wherein the mounting frame (31) is provided with a reversible electromagnet mounting groove (32), and a coil winding space (33) provided outside the reversible electromagnet mounting groove (32), the coil winding space (33) having a rectangular annular cross section, the coil being disposed in the coil winding space.

6. A powerful electromagnetic vibrator according to claim 4, characterized in that the reversible electromagnet (34) is made of alnico.

7. A powerful electromagnetic vibrator according to claim 1, characterized in that a buffer (5) is arranged between the vibrating head (4) and the base (1).