Anti-resonant vibrating screen

Abstract

The present application relates to the technical field of screening equipment, and particularly relates to a counter-resonance vibrating screen, which comprises a vibration exciter, the top of the vibration exciter is connected with one side of an elastic body, the other side of the elastic body is connected with a screen box, wherein the elastic body comprises a plurality of main vibration springs, the main vibration springs are in a cylindrical structure, the axial direction of the main vibration springs is arranged in parallel with the screen surface of the screen box, one side of the outer circumferential surface of the main vibration springs is connected with the vibration exciter, the other side of the outer circumferential surface of the main vibration springs is connected with the screen box, and the vibration exciter and the screen box are oppositely arranged with respect to the main vibration springs. The present application has the beneficial effect that when the vibration exciter vibrates to make the vibration table vibrate, due to the limitation of the structural shape of the main vibration springs, the main vibration springs can only elastically deform in the direction perpendicular to the axial direction of the main vibration springs to transmit the vibration of the vibration table to the screen box, the torsion in the left-right direction of the main vibration springs is greatly reduced or even eliminated, and finally the screen box can only vibrate in the direction perpendicular to the screen surface, and a limiter is not needed.

Description

Technical Field

[0001] This invention relates to the field of screening equipment technology, and specifically to an anti-resonance vibrating screen. Background Technology

[0002] In the metallurgical, mining, and coal preparation industries, screening is an indispensable and crucial step. Vibrating screens are among the most commonly used screening equipment. Traditional vibrating screens come in many types, classified by application (coal grading vibrating screens, ore grading vibrating screens, cold ore screens, hot ore screens, etc.), by screening principle (probability screens, equal thickness screens, probability equal thickness screens, etc.), by drive principle (elastic linkage type, electromagnetic type, inertial type, pneumatic and hydraulic type, etc.), by dynamic characteristics (e.g., by the position of the operating point in the frequency response curve, such as far-resonance screens, non-resonance screens, low-critical near-resonance screens, and anti-resonance screens), by whether the vibration system is linear or nonlinear (linear vibrating screens and nonlinear vibrating screens), and by the motion trajectory of the working parts (linear motion vibrating screens, circular motion vibrating screens, and elliptical motion vibrating screens, etc.).

[0003] In an anti-resonance vibrating screen, the screen box is the upper mass and the exciter is the lower mass. Under anti-resonance conditions, the upper mass operates according to the required amplitude of the screen, while the lower mass remains almost stationary, easily achieving good vibration isolation. The upper mass of the anti-resonance vibrating screen lacks an exciter, resulting in a small vibrating mass. This allows for a lower screen box height and eliminates the need for exciter reinforcement, further reducing the vibrating mass by 20%–30%. This reduction in vibrating mass also reduces the excitation force and motor power, contributing to energy savings. With the lower mass barely vibrating, it's easier to ensure the required stiffness and strength during design. The exciter can be designed primarily for static loads, significantly reducing overall machine noise.

[0004] Current anti-resonance vibrating screens mostly use helical springs to transmit vibration from the exciter to the screen box. During vibration, the helical springs experience torque and a force perpendicular to the screen surface. The torque on the helical springs causes the screen box to deflect during vibration. Therefore, existing technologies typically include a limiter, with one end fixedly connected to the screen box and the other end fixedly connected to the exciter, constraining the relative movement of the screen box and the exciter, ensuring that the screen box and the exciter only produce relative movement perpendicular to the screen surface. However, this approach has two drawbacks: first, the torque of the helical spring is only limited by the limiter, not reduced; second, it increases the design cost, manufacturing cost, and placement space required for the limiter. Summary of the Invention

[0005] To address the technical problem that the helical springs in existing anti-resonance vibrating screens have torque, resulting in low effective vibration force and requiring additional limiters, this invention provides an anti-resonance vibrating screen.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] An anti-resonance vibrating screen includes an exciter, the top of which is connected to one side of an elastic body, and the other side of the elastic body is connected to a screen box. The elastic body includes a plurality of main vibration springs, each with a cylindrical structure. The axial direction of the main vibration springs is parallel to the screen surface of the screen box. One side of the outer circumferential surface of the main vibration spring is connected to the exciter, and the other side of the outer circumferential surface of the main vibration spring is connected to the screen box. The exciter and the screen box are arranged opposite to each other about the main vibration springs.

[0008] With the above structural scheme, when the vibrating body vibrates and the vibrating table vibrates, due to the limitation of the structural shape of the main vibration spring, the main vibration spring can only undergo elastic deformation in the direction perpendicular to its own axial direction to transmit the vibration of the vibrating table to the screen box, which greatly reduces or even eliminates the torque in the left and right directions on the main vibration spring, and finally makes the screen box vibrate only in the direction perpendicular to the screen surface, and there is no need to set a limiter.

[0009] As a preferred implementation of an anti-resonance vibrating screen, a vibration table is connected to the output component of the exciter, the elastic body and the exciter are connected through the vibration table, and multiple main vibration springs are connected to the table surface.

[0010] The above structural design ensures that all main vibration springs are subjected to uniform force simultaneously.

[0011] As a preferred implementation of an anti-resonance vibrating screen, the bottom of the screen box is equipped with multiple crossbeams, and multiple main vibration springs are divided into multiple groups, with each group of main vibration springs connected to a corresponding crossbeam.

[0012] The above structural design can securely and effectively connect the main vibration spring and the screen box, and ensure that all parts of the screen box are subjected to uniform force.

[0013] As a preferred implementation of an anti-resonance vibrating screen, each set of main vibration springs is divided into transverse main vibration springs and longitudinal main vibration springs, with the axial directions of the transverse and longitudinal main vibration springs being perpendicular.

[0014] With the above structural design, there are both transverse main vibration springs and longitudinal main vibration springs on the same crossarm. These two types of main vibration springs can constrain each other's deformation in directions other than the direction perpendicular to the screen surface, thereby constraining the relative movement of the exciter and the screen box in other directions.

[0015] As a preferred implementation of an anti-resonance vibrating screen, the transverse main vibration spring and the longitudinal main vibration spring are alternately arranged.

[0016] With the above structural design, the cross-sectional and longitudinal main vibration springs are staggered, which can better constrain the deformation in directions other than the direction perpendicular to the screen surface. This allows the main vibration spring on each crossarm to vibrate in the direction perpendicular to the screen surface, ultimately making the screen box vibrate only in the direction perpendicular to the screen surface, without the need for limiters.

[0017] As a preferred implementation of an anti-resonance vibrating screen, the outer circumferential surface of the main vibration spring between the exciter direction and the screen box direction is arc-shaped.

[0018] By adopting the above structural design, the main vibration spring can only deform along the direction from the exciter to the screen box, thus reducing torque.

[0019] As a preferred implementation of an anti-resonance vibrating screen, the cross-section of the main vibration spring is circular, elliptical, or oblong.

[0020] As a preferred implementation of an anti-resonance vibrating screen, the screen box is inclined with one end higher than the other.

[0021] Using the above structural design, this application is mainly applicable to the anti-resonance vibration of inclined screen boxes.

[0022] As a preferred implementation method for an anti-resonance vibrating screen, the main vibration spring is a rubber-metal composite spring.

[0023] By adopting the above structural design, the main vibration spring has higher structural strength, further reducing deformation in other directions on the main vibration spring.

[0024] The beneficial effects of this invention are as follows:

[0025] When the vibrating body vibrates and causes the vibrating table to vibrate, due to the structural shape limitation of the main vibration spring, the main vibration spring can only undergo elastic deformation in a direction perpendicular to its own axial direction to transmit the vibration of the vibrating table to the screen box. This greatly reduces or even eliminates the left-right torque on the main vibration spring, ultimately causing the screen box to vibrate only in a direction perpendicular to the screen surface, and there is no need to set a limiter. Attached Figure Description

[0026] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a side view of an anti-resonance vibrating screen according to a specific embodiment of the present invention.

[0028] Figure 2 for Figure 1 A cross-sectional view along the AA direction;

[0029] Figure 3 for Figure 1 Enlarged view of section B in the diagram.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1. Exciter; 11. Vibration table; 2. Main vibration spring; 21. Transverse main vibration spring; 22. Longitudinal main vibration spring; 3. Screen box; 31. Crossbeam. Detailed Implementation

[0032] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0033] Reference Figure 1-3 This embodiment proposes an anti-resonance vibrating screen, which includes an exciter 1. A vibrating table 11 is connected to the output component of the exciter 1. The top surface of the vibrating table 11 is connected to one side of an elastic body, and the other side of the elastic body is connected to a crossbeam 31 at the bottom of the screen box 3. The screen box 3 is inclined with one end higher than the other. The elastic body includes multiple main vibration springs 2, which are rubber-metal composite springs or resin-based composite springs. All the main vibration springs 2 are connected to the surface of the vibrating table 11. The bottom of the screen box 3 is provided with multiple crossbeams 31. The multiple main vibration springs 2 are divided into multiple groups, and each group of main vibration springs 2 is connected to a corresponding crossbeam 31. The main vibration springs 2 have a cylindrical structure, and their axial direction is parallel to the screen surface of the screen box 3. One side of the outer circumferential surface of the main vibration spring 2 is connected to the vibration table 11, and the other side of the outer circumferential surface of the main vibration spring 2 is connected to the crossarm 31. The exciter 1 and the screen box 3 are arranged opposite each other about the main vibration spring 2. The outer circumferential surface of the main vibration spring 2 from the direction of the exciter 1 to the direction of the screen box 3 is arc-shaped. Specifically, the cross-section of the main vibration spring 2 is oblong. The two straight sides of the outer circumferential surface of the main vibration spring 2 with oblong cross-section are connected to the crossarm 31 and the vibration table 11 respectively, and the two arc-shaped sides of the outer circumferential surface are located between the crossarm 31 and the vibration table 11. In other embodiments, the cross-section of the main vibration spring 2 can also be circular, elliptical, etc., as long as the outer circumferential surface of the main vibration spring 2 from the direction of the exciter 1 to the direction of the screen box 3 is arc-shaped. Each group of main vibration springs 2 is divided into a transverse main vibration spring 21 and a longitudinal main vibration spring 22. The axial directions of the transverse main vibration spring 21 and the longitudinal main vibration spring 22 are arranged perpendicularly. The transverse main vibration spring 21 and the longitudinal main vibration spring 22 are arranged alternately.

[0034] The principle of this embodiment is as follows:

[0035] When the vibrating body 1 vibrates, causing the vibrating table 11 to vibrate, the structural shape of the main vibration spring 2 restricts its elastic deformation to occur only in a direction perpendicular to its own axial direction. This greatly reduces or even eliminates the left-right torque on the main vibration spring 2. Furthermore, because the transverse main vibration spring 21 and the longitudinal main vibration spring 22 are staggered, they constrain each other's deformation in directions other than perpendicular to the screen surface. This allows the main vibration spring 2 on each crossbeam 31 to vibrate in a direction perpendicular to the screen surface, ultimately ensuring that the screen box 3 can only vibrate in a direction perpendicular to the screen surface. Therefore, the cylindrical structure and staggered arrangement of the main vibration spring 2 enable the screen box 3 to vibrate only in a direction perpendicular to the screen surface, eliminating the need for the limiters found in existing anti-resonance vibrating screens.

[0036] In this embodiment, the transverse main vibration spring 21 and the longitudinal main vibration spring 22 are arranged alternately. The transverse main vibration spring 21 and the longitudinal main vibration spring 22 on the same crossbeam 31 can be arranged alternately or alternately, so as to constrain the deformation of each other in other directions. Other directions are those other than those perpendicular to the screen surface.

[0037] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An anti-resonance vibrating screen, comprising an exciter (1), the top of which is connected to one side of an elastic body, and the other side of which is connected to a screen box (3), characterized in that: The elastic body includes multiple main vibration springs (2). The main vibration springs (2) are cylindrical structures. The axial direction of the main vibration springs (2) is parallel to the screen surface of the screen box (3). One side of the outer peripheral surface of the main vibration springs (2) is connected to the exciter (1), and the other side of the outer peripheral surface of the main vibration springs (2) is connected to the screen box (3). The exciter (1) and the screen box (3) are arranged opposite to the main vibration springs (2). A vibration table (11) is connected to the output component of the exciter (1). The elastic body is connected to the exciter (1) through the vibration table (11). Multiple main vibration springs (2) are connected to the table surface of the vibration table (11). The bottom of the sieve box (3) is provided with multiple crossarms (31), and multiple main vibration springs (2) are divided into multiple groups. Each group of main vibration springs (2) is connected to a crossarm (31). Each set of main vibration springs (2) is divided into a transverse main vibration spring (21) and a longitudinal main vibration spring (22), and the axial directions of the transverse main vibration spring (21) and the longitudinal main vibration spring (22) are set perpendicularly. The transverse main vibration spring (21) and the longitudinal main vibration spring (22) are arranged alternately.

2. The anti-resonance vibrating screen according to claim 1, characterized in that, The outer circumference of the main vibration spring (2) between the direction of the exciter (1) and the direction of the screen box (3) is arc-shaped.

3. The anti-resonance vibrating screen according to claim 2, characterized in that, The cross-section of the main oscillation spring (2) is circular, elliptical or oblong.

4. The anti-resonance vibrating screen according to claim 1, characterized in that, The sieve box (3) is set at an angle with one end higher than the other.

5. The anti-resonance vibrating screen according to claim 1, characterized in that, The main vibration spring (2) is a rubber-metal composite spring or a resin-based composite spring.

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