CN111167691A - High-frequency electromagnetic vibration exciter - Google Patents
High-frequency electromagnetic vibration exciter Download PDFInfo
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- CN111167691A CN111167691A CN202010141800.0A CN202010141800A CN111167691A CN 111167691 A CN111167691 A CN 111167691A CN 202010141800 A CN202010141800 A CN 202010141800A CN 111167691 A CN111167691 A CN 111167691A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
- B06B1/04—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with electromagnetism
Abstract
The invention relates to a high-frequency electromagnetic vibration exciter, which comprises a vibration exciter shell made of a non-magnetic material, a motor and a vibration exciting sheet, wherein the vibration exciting sheet is arranged in an inner cavity defined by the vibration exciter shell, the vibration exciting sheet comprises an upper vibration exciting sheet and a lower vibration exciting sheet, the upper vibration exciting sheet is arranged on a motor rotating shaft extending into the inner cavity and is driven by the motor to rotate, and the lower vibration exciting sheet is arranged on a vibration exciting connecting rod extending into the inner cavity; the upper excitation piece and the lower excitation piece are respectively provided with magnets which are the same in quantity and are uniformly arranged, the N pole and the S pole of adjacent magnets on the same excitation piece are opposite in direction, and the distance from the magnet arranged on the upper excitation piece to the circle center of the upper excitation piece is equal to the distance from the magnet arranged on the lower excitation piece to the circle center of the lower excitation piece; and a spring is also arranged between the upper vibration exciting sheet and the lower vibration exciting sheet, and is in a compressed state under the non-working state of the vibration exciter. The vibration exciter of the invention has the characteristics of low energy consumption, low noise, high frequency and the like.
Description
Technical Field
The invention belongs to the field of vibration exciters, and particularly relates to a high-frequency electromagnetic vibration exciter.
Background
The high-frequency vibration exciter is widely applied to metallurgy, mines and mechanical manufacturing industries. The traditional high-frequency vibration exciter is mostly motor centrifugal type, and its principle is that centrifugal inertial force or impact force that utilize eccentric mass rotation type to produce are as exciting force, and wherein the primary structure is that a motor drives eccentric rotation, and the vibration frequency is mostly within 50Hz, and the high-speed motor is adopted to the rare, and the vibration frequency is the highest only 200 Hz. More importantly, the energy conversion rate of the centrifugal vibration exciter is less than 50%, and the noise is large.
The traditional electromagnetic vibration exciter mostly adopts armature high-frequency vibration to generate acting force on an iron core to realize vibration, and the damage of vibration exciter components is often caused.
Disclosure of Invention
The invention aims to provide a high-frequency electromagnetic vibration exciter which has the characteristics of low energy consumption, low noise, high frequency and the like.
In order to achieve the purpose, the invention adopts the technical scheme that: a high-frequency electromagnetic vibration exciter comprises a vibration exciter shell made of nonmagnetic materials, a motor and a vibration exciting sheet, wherein the vibration exciting sheet is arranged in an inner cavity defined by the vibration exciter shell, the vibration exciting sheet comprises an upper vibration exciting sheet and a lower vibration exciting sheet, the upper vibration exciting sheet is arranged on a motor rotating shaft extending into the inner cavity and is driven by the motor to rotate, and the lower vibration exciting sheet is arranged on a vibration exciting connecting rod extending into the inner cavity; the upper excitation piece and the lower excitation piece are respectively provided with magnets which are the same in quantity and are uniformly arranged, the N pole and the S pole of adjacent magnets on the same excitation piece are opposite in direction, and the distance from the magnet arranged on the upper excitation piece to the circle center of the upper excitation piece is equal to the distance from the magnet arranged on the lower excitation piece to the circle center of the lower excitation piece; and a spring is also arranged between the upper vibration exciting sheet and the lower vibration exciting sheet, and is in a compressed state under the non-working state of the vibration exciter.
The magnet is a cylindrical permanent magnet and is embedded on the upper vibration exciting sheet and the lower vibration exciting sheet.
The number of the magnets is equal to the vibration frequency of the excitation connecting rod divided by the rotating speed of the motor.
The vibration exciter shell comprises an upper cover plate, a lower cover plate and a shell positioned between the two cover plates.
The inner wall of the shell is provided with an annular bulge, an upper excitation piece is accommodated between the annular bulge and the upper cover plate, and a lower excitation piece is accommodated between the annular bulge and the lower cover plate.
An adjusting device is further arranged between the lower cover plate and the shell to adjust the maximum amplitude of the vibration exciter.
Go up the excitation piece and include excitation piece apron and last excitation piece body, magnet is inlayed in last excitation piece body, presss from both sides the magnet at last excitation piece apron between the excitation piece body through installing the mounting on motor rotation epaxial.
The lower excitation piece comprises a lower excitation piece cover plate and a lower excitation piece body, the magnet is embedded in the lower excitation piece body, and the magnet is clamped between the lower excitation piece cover plate and the lower excitation piece body through a fixing piece arranged on the excitation connecting rod.
The spring is a non-magnetic spring.
The motor is a variable frequency motor.
The working process of the invention is as follows: turning on a power supply of the motor to rotate the motor; when the N pole of the cylindrical magnet in the upper excitation sheet meets the N pole of the cylindrical magnet in the lower excitation sheet, the upper excitation sheet and the lower excitation sheet repel each other; when the rotor rotates for 360 degrees/m (m is the number of the cylindrical magnets on each exciting piece), the S pole of the cylindrical magnet in the upper exciting piece meets the N pole of the cylindrical magnet in the lower exciting piece inevitably, the upper exciting piece and the lower exciting piece attract each other inevitably, the exciting connecting rod vibrates in high frequency under the action of the spring, and the vibration frequency is the product of the rotating speed of the motor and the number m of the cylindrical magnets on each exciting piece.
Compared with the prior art, the frequency of the high-frequency vibration exciter provided by the invention has the following advantages: 1. the frequency of the high-frequency vibration exciter is several times of the rotating speed of the motor, namely the vibration exciting frequency is not limited by the motor retransmission any more. 2. The energy conversion rate of the vibration exciter is greatly improved, and the noise is low.
Drawings
FIG. 1 is a front view of the present invention;
3 FIG. 3 2 3 is 3 a 3 cross 3- 3 sectional 3 view 3 taken 3 along 3 line 3 A 3- 3 A 3 of 3 FIG. 3 1 3; 3
The labels in the figure are: 1. a vibration exciter shell; 1-1, an upper cover plate; 1-1-1, an upper cover plate flange; 1-1-2, a motor support; 1-1-3, an upper cover plate central hole; 1-2, a shell; 1-2-1, annular protrusion; 1-2-2, a lower cover plate flange; 1-3, a lower cover plate; 1-4, a gasket;
2. a motor; 2-1, a motor body; 2-2 motor rotation axis; 2-3, fixing a nut on the upper excitation sheet;
3. an upper excitation sheet; 3-1, an upper excitation sheet body; 3-2, arranging a cylindrical magnet of an excitation sheet; 3-3, arranging a vibration sheet cover plate;
4. a lower vibration sheet; 4-1, lower excitation slice body; 4-2, lower excitation sheet cylindrical magnet; 4-3, a spring; 4-4, exciting a connecting rod; 4-5, fixing a nut on the lower excitation sheet; 4-6, lower exciting sheet cover plate;
5. and (5) fixing the bolt.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and examples, but the invention is not limited thereto.
As shown in the figure, the high-frequency electromagnetic vibration exciter comprises a vibration exciter shell 1, a motor, an upper vibration exciting sheet 3 and a lower vibration exciting sheet 4.
The vibration exciter shell 1 comprises a shell body 1-2, an upper cover plate 1-1, a lower cover plate 1-3 and a gasket 1-4, and the shell body, the upper cover plate, the lower cover plate and the gasket are all made of nonmagnetic materials. The middle of the inner wall of the shell 1-2 is provided with an annular bulge 1-2-1, an upper exciting sheet 3 is arranged between the annular bulge 1-2-1 and the upper cover plate 1-1, a lower exciting sheet 4 is arranged between the annular bulge 1-2-1 and the lower cover plate 1-3, and the annular bulge 1-2-1 can also be used for limiting the upper stroke position of the lower exciting sheet 4, so that the lower exciting sheet 4 and the upper exciting sheet 3 are prevented from directly colliding, and the generation of noise is avoided.
The upper cover plate 1-1 comprises a shell flat cover plate and a supporting table of the motor 2, wherein the center of the shell flat cover plate and the supporting table are provided with corresponding upper cover plate center holes 1-1-3 for the motor rotating shaft 2-2 to pass through, an upper excitation piece 3 is arranged between the shell flat cover plate and the annular bulge 1-2-1, and the upper cover plate 1-1 is connected with the shell body 1-2 through an upper cover plate flange 1-1-1.
The motor 2 comprises a motor body 2-1 and a motor rotating shaft 2-2, the motor body 2-1 is a variable frequency motor and is fixed on the supporting table of the upper cover plate 1-1, the motor rotating shaft 2-2 is provided with external threads, and two upper excitation piece fixing nuts 2-3 are installed.
The upper excitation piece 3 comprises an upper excitation piece cover plate 3-3, an upper excitation piece body 3-1 and a plurality of cylindrical magnets. The cylindrical magnets are embedded in the upper vibration piece body 3-1 and are arranged in a circular array, and the N poles and the S poles of the adjacent magnets are arranged in different directions. The upper excitation piece 3 is arranged on the motor rotating shaft 2-2, and the cylindrical magnet is clamped between the upper excitation piece cover plate 3-3 and the upper excitation piece body 3-1 through two upper excitation piece fixing nuts 2-3.
A central hole is formed in the center of the lower cover plate 1-3, so that the excitation connecting rod 4-4 can pass through the hole conveniently; a lower vibration exciting sheet 4 is arranged between the lower cover plate 1-3 and the annular bulge 1-2-1 of the shell 1-2; and a gasket 1-4 is arranged between the lower cover plate flange 1-2-2 and the shell flange, and the maximum amplitude of the vibration exciter can be adjusted according to the thickness of the gasket 1-4.
The lower excitation piece 4 comprises a lower excitation piece body 4-1, a lower excitation piece cover plate 4-6, a plurality of cylindrical magnets, springs 4-3, excitation connecting rods 4-4 and lower excitation piece fixing nuts 4-5. The cylindrical magnets are embedded in the lower excitation sheet body 4-1 and are arranged in a manner completely consistent with the magnets in the upper excitation sheet 3. The excitation connecting rod 4-4 is made of nonmagnetic materials and is provided with an external thread rod and two lower excitation piece fixing nuts 4-5. After the lower excitation piece 4 is arranged on the excitation connecting rod 4-4, the cylindrical magnet is clamped between the lower excitation piece cover plate 4-6 and the lower excitation piece body 4-1 through two lower excitation piece fixing nuts 4-5 on the excitation connecting rod 4-4. The upper part of the lower excitation piece cover plate 4-6 is connected with a spring 4-3, the length of the spring 4-3 is larger than the gap between the upper excitation piece 3 and the lower excitation piece 4, namely, a certain thrust exists between the upper excitation piece and the lower excitation piece under the non-working state.
Preferably, the vibration exciter housing 1 is made of high-strength plastic, aluminum alloy, titanium alloy or ceramic material, and more preferably, the vibration exciter housing 1 is made of high-strength plastic or aluminum alloy.
Preferably, the spring 4-3 is a high-elasticity spring, and more preferably a non-magnetic material spring, and the outer diameter of the spring is 2mm-5mm smaller than the inner diameter of the annular boss 1-2-1, and the length of the spring is 2mm-5mm larger than the gap between the upper excitation sheet and the lower excitation sheet, namely, the spring 4-3 is positioned in the cavity formed by the annular boss 1-2-1, so that the annular boss 1-2-1 can limit and support the spring 4-3.
Preferably, the cylindrical magnets are permanent magnets, the number of which is dependent on the excitation frequency and the motor speed. Typically, the number of cylindrical magnets is equal to the excitation frequency divided by the motor speed.
Preferably, the range of the vibration exciter can be adjusted by using the gasket 1-4, and other methods for enlarging the distance between the annular bulge 1-2-1 and the lower cover plate 1-3 are available.
Examples
According to the technical scheme of the invention, a 7300Hz high-frequency vibration exciter is designed, and a common motor of 1050 revolutions per minute and 12 cylindrical magnets are purchased.
As shown in fig. 2, 12 cylindrical magnets are respectively embedded on the upper excitation plate body 3-1 and the lower excitation plate body 4-1, that is, each excitation plate body has 6 cylindrical magnets. On any exciting piece, the adjacent two cylindrical magnets have opposite polarities; the upper excitation piece body 3-1 and the lower excitation piece body 4-1 are circular with the same diameter, and the distance from the upper excitation piece cylindrical magnet 3-2 arranged on the upper excitation piece body 3-1 to the circle center of the upper excitation piece body 3-1 is equal to the distance from the lower excitation piece cylindrical magnet 4-2 arranged on the lower excitation piece body 4-1 to the circle center of the lower excitation piece body 4-1.
The following describes the structure of the vibration exciter in conjunction with the mounting sequence of the vibration exciter.
As shown in figure 1, a motor rotating shaft 2-2 of a motor 2 passes through a center hole 1-1-3 of an upper cover plate of a vibration exciter, an upper vibration exciting sheet fixing nut 2-3 is installed, then an upper excitation piece body 3-1 embedded with an upper excitation piece cylindrical magnet 3-2 and an upper excitation piece cover plate 3-3 are arranged on a motor rotating shaft 2-2, another excitation piece fixing nut 2-3 is arranged on the motor rotating shaft 2-2, the upper excitation piece body 3-1 and the upper excitation piece cover plate 3-3 are fixed and clamped by the two upper excitation piece fixing nuts 2-3, the upper excitation piece cylindrical magnet 3-2 between the upper excitation piece body and the upper excitation piece cover plate is clamped, and finally the upper cover plate flange and the shell 1-2 of the vibration exciter are fixed by the fixing bolt 5, so that the upper excitation piece 3 is installed and fixed on the vibration exciter.
Continuing as shown in figure 1, a lower excitation sheet cover plate 4-6 provided with a spring 4-3 and a lower excitation sheet body 4-1 embedded with a lower excitation sheet cylindrical magnet 4-2 are arranged on an excitation connecting rod 4-4, the lower excitation sheet cover plate 4-6 and the lower excitation sheet body 4-1 are fixed together by two lower excitation sheet fixing nuts 4-5 on the excitation connecting rod 4-4, the lower excitation sheet cylindrical magnet 4-2 is clamped between the lower excitation sheet cover plate 4-6 and the lower excitation sheet body 4-1, then the lower part of a shell 1-2 of the vibration exciter is placed, the spring 4-3 is pressed against the bottom of the upper excitation sheet 3, namely against the upper excitation sheet cover plate 3-3, then a gasket 1-4 is arranged, the lower vibration exciter cover plate 1-3 is pressed against a lower cover plate flange 1-2-2 by a fixing bolt 5, and the lower vibration exciter cover plate 1-3 is pressed against a lower cover plate flange 1-2-2, And the gaskets 1-4 and the lower cover plate 1-3 are fixed, so that the assembly of the high-frequency electromagnetic vibration exciter is completed.
The basic working process of the vibration exciter is as follows: turning on the power supply of the motor 2 to enable the motor to rotate at the speed of 1050 revolutions per minute; when the N pole of the cylindrical magnet 3-2 of the upper vibration excitation sheet meets the N pole of the cylindrical magnet 4-2 of the lower vibration excitation sheet, the upper vibration excitation sheet 3 and the lower vibration excitation sheet 4 repel each other; when the upper vibration excitation piece 3 rotates by 60 degrees again, the S pole of the cylindrical magnet 3-2 of the upper vibration excitation piece and the N pole of the cylindrical magnet 4-2 of the lower vibration excitation piece meet with each other inevitably, the upper vibration excitation piece 3 and the lower vibration excitation piece 4 attract with each other inevitably, the vibration excitation connecting rod 4-4 vibrates at high frequency under the action of the spring 4-3, the vibration frequency is the product of 1050 rotations/min of the motor and 6 cylindrical magnets, and then the product is divided by 60, namely 105 Hz.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (10)
1. The utility model provides a high frequency electromagnetism vibration exciter, includes vibration exciter shell (1), motor (2) and the excitation piece that non-magnetic material made, the excitation piece sets up in the inner chamber that vibration exciter shell (1) encloses, its characterized in that: the vibration exciting sheet comprises an upper vibration exciting sheet (3) and a lower vibration exciting sheet (4), the upper vibration exciting sheet (3) is arranged on a motor rotating shaft (2-2) extending into the inner cavity and is driven by a motor (2) to rotate, and the lower vibration exciting sheet (4) is arranged on a vibration exciting connecting rod (4-4) extending into the inner cavity; the upper vibration exciting sheet (3) and the lower vibration exciting sheet (4) are respectively provided with magnets which are the same in quantity and are uniformly arranged, the N poles and S poles of adjacent magnets on the same vibration exciting sheet are opposite in direction, and the distance from the magnet arranged on the upper vibration exciting sheet (3) to the circle center of the upper vibration exciting sheet (3) is equal to the distance from the magnet arranged on the lower vibration exciting sheet (4) to the circle center of the lower vibration exciting sheet (4); and a spring (4-3) is also arranged between the upper vibration piece (3) and the lower vibration piece (4), and the spring (4-3) is in a compressed state in the non-working state of the vibration exciter.
2. A high-frequency electromagnetic exciter according to claim 1 wherein: the magnet is a cylindrical permanent magnet and is embedded on the upper vibration sheet (3) and the lower vibration sheet (4).
3. A high-frequency electromagnetic exciter according to claim 1 wherein: the number of the magnets is equal to the vibration frequency of the exciting connecting rods (4-4) divided by the rotating speed of the motor (2).
4. A high-frequency electromagnetic exciter according to claim 1 wherein: the vibration exciter shell (1) comprises an upper cover plate (1-1), a lower cover plate (1-3) and a shell (1-2) positioned between the two cover plates.
5. A high-frequency electromagnetic exciter according to claim 4 wherein: the inner wall of the shell (1-2) is provided with an annular bulge (1-2-1), an upper vibration sheet (3) is accommodated between the annular bulge (1-2-1) and the upper cover plate (1-1), and a lower vibration sheet (4) is accommodated between the annular bulge (1-2-1) and the lower cover plate (1-3).
6. A high-frequency electromagnetic exciter according to claim 4 wherein: an adjusting device is further arranged between the lower cover plate (1-3) and the shell (1-2) to adjust the maximum amplitude of the vibration exciter.
7. A high-frequency electromagnetic exciter according to claim 1 wherein: the upper vibration sheet (3) comprises an upper vibration sheet body (3-1) and an upper vibration sheet cover plate (3-3), the magnet is embedded in the upper vibration sheet body (3-1), and the magnet is clamped between the upper vibration sheet cover plate (3-3) and the upper vibration sheet body (3-1) through a fixing piece arranged on the motor rotating shaft (2-2).
8. A high-frequency electromagnetic exciter according to claim 1 wherein: the lower vibration excitation piece (4) comprises a lower vibration excitation piece body (4-1) and a lower vibration excitation piece cover plate (4-6), the magnet is embedded in the lower vibration excitation piece body (4-1), and the magnet is clamped between the lower vibration excitation piece cover plate (4-6) and the lower vibration excitation piece body (4-1) through a fixing piece arranged on the vibration excitation connecting rod (4-4).
9. A high-frequency electromagnetic exciter according to claim 1 wherein: the spring (4-3) is a non-magnetic spring.
10. A high-frequency electromagnetic exciter according to claim 1 wherein: the motor (2) is a variable frequency motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010141800.0A CN111167691A (en) | 2020-03-04 | 2020-03-04 | High-frequency electromagnetic vibration exciter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010141800.0A CN111167691A (en) | 2020-03-04 | 2020-03-04 | High-frequency electromagnetic vibration exciter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111167691A true CN111167691A (en) | 2020-05-19 |
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ID=70626103
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010141800.0A Pending CN111167691A (en) | 2020-03-04 | 2020-03-04 | High-frequency electromagnetic vibration exciter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111167691A (en) |
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2020
- 2020-03-04 CN CN202010141800.0A patent/CN111167691A/en active Pending
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