CN214077653U

CN214077653U - Vibration exciter of vibrating screen

Info

Publication number: CN214077653U
Application number: CN202022210982.0U
Authority: CN
Inventors: 叶诗豪; 杨运猛
Original assignee: Rishangsheng New Building Material Design And Research Institute Co ltd
Current assignee: Rishangsheng New Building Material Design And Research Institute Co ltd
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2021-08-31
Anticipated expiration: 2030-09-30

Abstract

The utility model discloses a vibration exciter of a vibrating screen, which relates to the field of vibrating screens and comprises winding conductors, permanent magnets and a screen, wherein a plurality of winding conductors are fixed on a screen box of the vibrating screen, a groove is arranged on each winding conductor, the screen is arranged in the screen box of the vibrating screen, the permanent magnets are fixedly arranged on two sides of the screen, and each permanent magnet is correspondingly embedded in the groove of one winding conductor; when the coil of the winding conductor is electrified with alternating current, the permanent magnet drives the screen mesh to vibrate up and down in the groove of the winding conductor. The utility model adopts the electromagnetic vibrator, can realize non-contact vibration, and has no noise pollution when the equipment runs; the vibration frequency and the vibration amplitude are stepless and adjustable, and the adaptability and the screening effect of the equipment are improved; mechanical transmission of a motor and a vibrator is omitted, the failure rate of equipment and the occupied area are reduced, and the operation cost is reduced; the structural form that the screen cloth vibrates, and the sieve case does not vibrate is adopted, compares traditional shale shaker, and the complete machine participates in the weight greatly reduced that shakes, and complete machine weight can alleviate a lot, and the energy is saved more.

Description

Vibration exciter of vibrating screen

Technical Field

The utility model relates to a field of shale shaker, concretely relates to shale shaker vibration exciter.

Background

The exciter is a device attached to some machines and equipments for generating exciting force, and is an important part for utilizing mechanical vibration. The vibration exciter can also be used as an exciting part to form a vibrating machine for realizing the work of conveying, screening, compacting and molding materials or objects, tamping soil gravels and the like.

At present, in vibration feeding (screening) equipment used in coal, metallurgical mine and other industries in China, one is a vibration motor (an electric vibration exciter or a vibration source three-phase asynchronous motor), and the other is a vibrator with an eccentric block driven by a common motor. The vibration force of the vibration exciters in the two forms can not be adjusted on line in the running process of equipment, and the superposition angle of eccentric blocks of a vibration motor or the number of auxiliary eccentric blocks must be adjusted to change the vibration force in a stop state. The obvious disadvantages of these two approaches are: only a plurality of fixed amplitude gears are adjustable, and stepless adjustment cannot be realized; the labor intensity of workers is high; manual adjustment is inconvenient.

Because the amplitude can not be adjusted on line, the starting torque of the equipment is larger, when the vibration shaft is driven by a motor, the impact on a power grid is larger, and the capacity of a power transformer is required to be higher; meanwhile, the driving power of the vibration machine during stable operation is greatly smaller than that during starting, and in order to start the vibration machine, a high-power driving motor must be selected, so that the cost of the motor is higher, and the power factor is lower when the driving motor runs.

In addition, the vibrating screen matched with the vibration exciter generally adopts a buffering steel spring to prevent vibration, so that the site noise is very large, and the comfort of people for using the equipment is greatly reduced.

Therefore, in the vibration equipment of coal and metallurgical mines in China, a vibration exciter which can conveniently change the magnitude of exciting force in the operation process, adjust the magnitude of production capacity on line and thoroughly change vibration noise in the structural form is particularly needed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the not enough of prior art existence, and provide a shale shaker vibration exciter, have the noiselessness of operation, screening efficiency is high, reduces the advantage of energy consumption.

The purpose of the utility model is accomplished through following technical scheme: the vibration exciter for the vibrating screen comprises winding conductors, permanent magnets and a screen mesh, wherein the winding conductors are fixed on a screen box of the vibrating screen, a groove is formed in each winding conductor, the screen mesh is arranged in the screen box of the vibrating screen, the permanent magnets are fixedly arranged on two sides of the screen mesh, and each permanent magnet is correspondingly embedded into the groove of one winding conductor; the polarity of the permanent magnets embedded into the grooves on two sides of the same screen is opposite, and when the coil of the winding conductor is electrified with alternating current, the permanent magnets drive the screen to vibrate up and down in the grooves of the winding conductor.

As a further technical scheme, the polarity of the permanent magnet embedded into the groove on the left side of the screen is an N pole, and the polarity of the permanent magnet embedded into the groove on the right side of the screen is an S pole.

The utility model has the advantages that:

1. the electromagnetic vibrator is adopted, so that non-contact vibration can be realized, and no noise pollution is caused when the equipment runs;

2. the vibration frequency is adjustable, the amplitude is stepless and adjustable, and the adaptability and the screening effect of the equipment are greatly improved;

3. because the mechanical transmission of a motor and a vibrator is omitted, the failure rate and the occupied area of the equipment are reduced, and the overall operation cost of the equipment is reduced;

4. the structural form that the screen cloth vibrates, and the sieve case does not vibrate is adopted, compares traditional shale shaker, and the complete machine participates in the weight greatly reduced that shakes, and complete machine weight can alleviate a lot, and the energy is saved more.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Description of reference numerals: winding conductor 1, permanent magnet 2, screen cloth 3, recess 4.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings:

example (b): as shown in the attached drawing 1, the vibration exciter of the vibrating screen comprises winding conductors 1, permanent magnets 2 and a screen mesh 3, wherein the winding conductors 1 are fixed on a screen box of the vibrating screen, a groove 4 is formed in each winding conductor 1, the screen mesh 3 is arranged in the screen box of the vibrating screen, the permanent magnets 2 are fixedly arranged on two sides of the screen mesh 3, and each permanent magnet 2 is correspondingly embedded into the groove 4 of one winding conductor 1; the polarity that same screen cloth 3 both sides permanent magnet 2 was embedded in recess 4 is opposite (in this embodiment, the polarity that screen cloth 3 left side was embedded in recess 4 is the N utmost point, and the polarity that screen cloth 3 right side was embedded in recess 4 is the S utmost point), and when winding conductor 1 'S coil circular current, permanent magnet 2 drove screen cloth 3 and vibrates about in winding conductor 1' S recess 4.

The utility model discloses a working process: when the vibration exciter works, alternating current is conducted on a coil of a winding conductor 1, referring to the attached drawing 1, the outer part of a permanent magnet 2 on the left side of a screen 3 is taken as an N pole, the outer part of a permanent magnet 2 on the right side is taken as an S pole, an induced magnetic field is instantly generated by the winding conductor 1 on the left side of the screen 3, the upper part is an S level, the lower part is an N level, and the lower part is thrust and suction on the left side of the screen 3 according to the principle that like poles repel and opposite poles attract; meanwhile, the induced magnetic field generated by the winding conductor 1 on the right side of the screen mesh 3 is opposite in direction, so that the lower part of the right side of the screen mesh 3 is also pushed, and the upper part of the right side of the screen mesh is attracted. The screen 3 is accelerated to suspend. With the change of the alternating current direction, the direction of the induced magnetic field generated by the winding conductor 1 is changed, and the screen mesh 3 is accelerated to sink. Therefore, the screen can rapidly vibrate up and down in a reciprocating manner by controlling the frequency and the size of the alternating current, so that the function of screening materials is achieved; meanwhile, the vibration amplitude and the frequency of the screen 3 can be adjusted in a stepless manner.

It should be understood that equivalent substitutions or changes to the technical solution and the inventive concept of the present invention should be considered to fall within the scope of the appended claims for the skilled person.

Claims

1. A vibration exciter of a vibrating screen is characterized in that: the winding screen comprises winding conductors (1), permanent magnets (2) and a screen (3), wherein the winding conductors (1) are fixed on a screen box of a vibrating screen, a groove (4) is formed in each winding conductor (1), the screen (3) is arranged in the screen box of the vibrating screen, the permanent magnets (2) are fixedly arranged on two sides of the screen (3), and each permanent magnet (2) is correspondingly embedded into the groove (4) of one winding conductor (1); the polarity of the permanent magnets (2) embedded in the grooves (4) on two sides of the same screen (3) is opposite, and when the coil of the winding conductor (1) is electrified with alternating current, the permanent magnets (2) drive the screen (3) to vibrate up and down in the grooves (4) of the winding conductor (1).

2. A vibration exciter for a vibrating screen according to claim 1, wherein: the polarity that screen cloth (3) left side permanent magnet (2) were embedded in recess (4) is the N utmost point, and the polarity that screen cloth (3) right side permanent magnet (2) were embedded in recess (4) is the S utmost point.