CN101972742A - elliptical track vibrating screen - Google Patents

Abstract

The invention relates to an elliptical track vibrating screen, which belongs to the field of vibratory screening machines, can ensure that material particles move in an elliptical track on a screen surface, solve the problem of mesh blockage caused by materials which are difficult to screen or critical particle materials, and improve the sieving rate of the vibrating screen. The vibrating screen mainly comprises a screen frame, the screen surface, a double-shaft gear forced-synchronization exciter, a single-shaft exciter, a vibration reduction support device and a motor transmission device, wherein the double-shaft gear forced-synchronization exciter is arranged on a driving girder of the screen frame to ensure that a screen box vibrates in a linear track according to a 30 to 60 DEG vibration direction angle; an axis of the single-shaft exciter traverses the screen frame and is arranged under two lateral plates of the screen frame or the driving girder to ensure that the screen box vibrates in a circular track; and combination of vibration of the double-shaft gear forced-synchronization exciter and the single-shaft exciter drives the screen box to vibrate in the elliptical track in a longitudinal plane. The elliptical track vibrating screen has the characteristics of compact structure, steady operation, high sieving efficiency and the like, is convenient to adjust, and is suitable for screening the materials which are difficult to screen in various industries.

Description

Elliptical track vibrating screen

technical field

The invention belongs to the field of vibrating screening machinery, and mainly relates to an elliptical track vibrating screen for sieving difficult-to-sieve materials or solving the problem of critical particles stuck in holes on the sieve surface.

Background technique

In the existing linear vibrating screen and circular vibrating screen, the projecting angle of the linear vibrating screen is single, and the critical particles in the material are easy to form stuck holes on the screen. The conveying capacity is poor, and only the elliptical orbit vibrating screen has the advantages of no material blocking and strong conveying capacity at the same time. In the existing three-axis elliptical vibrating screen, the elliptical trajectory is realized by the forced synchronous transmission of the three axes through gears. The structure is complex, the manufacturing cost is high, the amplitude adjustment is inconvenient, and the failure rate during operation is relatively high.

Contents of the invention

The purpose of the present invention is to provide an elliptical track vibrating screen, which can better solve the problems of screening of difficult-to-sieve materials and material stuck holes, and improve the screening efficiency of the vibrating screen.

The present invention is realized through the following measures, mainly composed of a screen box composed of a screen frame and a screen surface, a vibration exciter, a vibration damping support device and a motor transmission device, and is characterized in that: the elliptical track vibrating screen is formed on the screen frame There are two types of exciters installed on it, which are two-axis gear forced synchronous exciter and single-axis exciter. The dual-axis gear forced synchronous vibrator is installed on the top of the driving main beam on the screen frame. The two shafts rotate in the opposite direction through gears with equal parameters and a transmission ratio of 1. The motor transmission is connected with one of the shafts to generate The resultant force line of excitation passes through the center of mass of the vibrating screen box, so that the screen box forms a linear vibration track in the longitudinal plane, and the adjustment range of the vibration direction angle is 30-60°. The single-axis vibrator is installed on the two side plates of the screen frame or under the driving main beam, the axis is perpendicular to the side plate of the screen frame, and its center is set on the resultant force line of the double-axis gear forced synchronous vibrator. Driven by the motor drive, the screen box forms a circular vibration track in the longitudinal plane. The vibration synthesis of the dual-axis gear forced synchronous exciter and the single-axis exciter makes the screen box produce an elliptical vibration track in the longitudinal plane.

According to the specifications of the vibrating screen and the needs of screening materials, the shape of the elliptical vibration track, that is, the eccentric mass of the eccentric block on the dual-axis gear forced synchronous vibrator and the single-axis vibrator can be adjusted, thereby changing the long axis of the elliptical vibration track. and the size of the minor axis. The long axis of the elliptical vibration track is adjusted by the eccentric mass on the dual-axis gear forced synchronous exciter; the short axis of the elliptical vibration track is adjusted by the eccentric mass on the single-axis vibrator. Two shaft gear forced synchronous vibrators can be arranged in series on the vibrator mounting beam. The single-axis vibration exciter can be replaced by a vibration motor, which is installed under the driving main beam of the screen frame. The sieve surface has 1-3 layers, the inclination angle of the sieve surface is 0-30°, and the shape of the sieve surface is straight line or broken line.

The beneficial effect of the present invention is that, due to the application of the dual-axis gear to force the synchronous vibrator and the single-axis vibrator to work at the same time, the elliptical vibration track of the screen box runs accurately and stably, and the material layer is uniform, and at the same time it has The advantages of not blocking the screen hole and strong conveying capacity. And the shape of the elliptical vibration track of the screen box can be determined according to the specific conditions of the screened materials. It has the characteristics of compact structure, stable operation, convenient adjustment and high screening efficiency, and is suitable for screening difficult-to-screen materials in various industries.

Description of drawings

Fig. 1 and Fig. 2 are schematic structural diagrams of the present invention, and Fig. 2 is a view from the direction A of Fig. 1 . In the figure, 1 is the screen frame, 2 is the screen surface, 3 is the double-axis gear forced synchronous vibration exciter, 4 is the single-axis vibration exciter, 5 is the vibration-reducing support device, 6 is the double-axis vibration exciter motor transmission device, 7 8 is the drive main beam, L is the resultant force line of the dual-axis gear forced synchronous vibrator 3, α is the vibration direction angle, and K is the center of mass of the vibrating screen box.

Detailed ways

An embodiment of the present invention is described below in conjunction with the accompanying drawings. It consists of a screen box composed of a screen frame 1 and a screen surface 2, a vibration exciter 3, 4, a vibration damping support device 5, and a motor transmission device 6, 7. The synchronous vibrator 3 is installed on the top of the driving main beam 8 on the screen frame 1, and the two shafts rotate in the opposite direction through gears with equal parameters and a transmission ratio of 1, and the motor transmission device 6 is connected with one shaft of the vibrator , the resultant line of action L that produces excitation passes through the center of mass K of the vibrating screen box, so that the screen box forms a linear vibration track in the longitudinal plane, and the vibration direction angle α is 45°. The single-axis vibrator 4 is installed on the two side plates of the screen frame 1, the center is located on the resultant force line L of the double-axis gear forced synchronous vibrator 3, the axis is perpendicular to the side plate of the screen frame 1, and the motor transmission device 7 connections, so that the screen box forms a circular vibration track in the longitudinal plane. The vibration synthesis of the dual-axis gear forced synchronous vibrator 3 and the uniaxial vibrator 4 makes the screen box produce an elliptical vibration track in the longitudinal plane.

Two double-shaft gear forced synchronous vibrators 3 are arranged in series on the driving main beam 8, and are driven by the motor transmission device 6; The sieve surface 2 is a single layer, the inclination angle of the sieve surface 2 is 0°, and the shape of the sieve surface 2 is linear.

Claims (4)

1. An elliptical track vibrating screen mainly consists of a sieve box, an exciter, a vibration damping support device and a motor transmission device composed of a screen frame and a screen surface, and is characterized in that: the elliptical track vibrating screen is placed in the screen frame ( 1) There are two types of exciters installed on the top, which are two-shaft gear forced synchronous exciter (3) and single-shaft synchronous exciter (4); double-shaft gear forced synchronous exciter (3) is installed on the screen On the top of the driving main beam (8) on the frame (1), its two shafts rotate in the opposite direction through gears with equal parameters and a transmission ratio of 1, and the motor transmission (6) is connected to one of the shafts to generate excitation The resultant force line L of the vibrating screen box passes through the center of mass K of the vibrating screen box, so that the screen box forms a linear vibration track in the longitudinal plane, and the adjustment range of the vibration direction angle α is 30-60°; The two side plates of the frame (1) or the underside of the driving main beam (8), the axis is perpendicular to the side plates of the screen frame (1), and its center is set at the resultant force of the double-shaft gear forced synchronous vibrator (3) On the line L, it is driven by the motor transmission device (7), so that the screen box forms a circular vibration track in the longitudinal plane; The box produces an elliptical vibration trajectory in the longitudinal plane. 2. The elliptical trajectory vibrating screen according to claim 1, characterized in that: the shape of the elliptical vibration trajectory is the eccentric mass of the eccentric block on the dual-axis gear forced synchronous vibrator (3) and the uniaxial vibrator (4) It can be adjusted, the long axis of the elliptical vibration track is adjusted by the eccentric mass on the dual-axis gear forced synchronous exciter (3), and the short axis of the elliptical vibration track is adjusted by the eccentric mass on the single-axis vibrator (4). 3. The elliptical track vibrating screen according to claim 1, characterized in that: the uniaxial vibrator (4) can be replaced by a vibrating motor, installed under the driving main beam (8) of the screen frame (1). 4. The elliptical trajectory vibrating screen according to claim 1, characterized in that: the screen surface (2) has 1-3 layers, the inclination angle of the screen surface (2) is 0-30°, and the shape of the screen surface (2) is Straight or curved.

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