CN103909060A - Self-synchronizing translation elliptical vibrating screen with three shock excitation motors - Google Patents

Abstract

The invention discloses a self-synchronous translational elliptical vibrating screen with three exciting motors, which consists of a feeding hopper, a first exciting motor, a second exciting motor, a third exciting motor, a screen box, a vibration isolation spring and a base composition. The second excitation motor is parallel to the axis of the third excitation motor, adopts the same eccentric mass moment and rotates in the opposite direction at a constant speed. The linear excitation force makes the center of mass of the screen box move in a straight line and swing around the center of mass; the axis of the first excitation motor is parallel to the axes of the second and third excitation motors, and the excitation force generated by the first excitation motor makes the screen box The center of mass makes a circular motion and swings around the center of mass. By properly designing the installation positions of the three excitation motors, the translational elliptical motion of the screen box can be realized. The invention can provide a large excitation force, and the installation position of the motor is not limited by the structure of the screen box during design, the structure is simple, the manufacture and installation are easy, the maintenance is simple, the noise is small, and the cost is low.

Description

Three-excitation motor self-synchronous translational elliptical vibrating screen

technical field

The invention relates to a self-synchronized translational elliptical vibrating screen with three excitation motors for solid-liquid separation and solid-phase separation, especially a large-area elliptical vibrating screen used in operations such as coal, mining, metallurgy, and oil drilling.

Background technique

The inertial elliptical vibrating screen can be realized with double excitation motors, three excitation motors, or even more excitation motors. When dual excitation motors are used, due to the limitation of the excitation force of the motors, when the screening area of the vibrating screen is large, it is difficult to achieve the working parameters such as the amplitude required for efficient screening of the vibrating screen. Three excitation motors are used to better meet the excitation force requirements of large-area vibrating screens. ZL200420061661.7 proposes an elliptical vibration multi-vibration vibrating screen, and ZL200710011470.8 and ZL200720012353.9 propose a three-axis self-synchronizing elliptical vibrating screen. The three excitation axes are installed in the same horizontal plane on the screen box. The structure is simple and easy to install. It is convenient, but the installation position between the motors will cause the center of gravity of the screen box to be more inclined to the side of the discharge outlet when realizing translational motion, so that the vibration-damping support spring of the screen box will be stressed unevenly. In addition, the synchronous phase difference angle between the motors will affect the vibration The balance of the sieve vibration movement is greatly affected. ZL200520036270.4 relates to a three-motor full-vibration self-synchronizing vibrating screen, in which two motors are installed on the upper part of the screen box and rotate in the opposite direction at a constant speed, and the other motor is installed at the center of mass of the screen box, and the three excitation motors simultaneously The elliptical trajectory movement of the vibrating screen is realized during working hours. It is a harsh condition that a motor is installed at the center of mass of the screen box, which is difficult to achieve in actual design. In order to overcome the above-mentioned shortcomings of the elliptical vibrating screen with three exciting motors, the self-synchronized translational elliptical vibrating screen with three exciting motors of the present invention is proposed.

Contents of the invention

The purpose of the present invention is to provide a self-synchronized translational elliptical vibrating screen with three exciting motors, which is simple in structure, easy to install, uniform in force on the supporting damping spring, and does not need to be limited by the condition of passing the center of mass for the installation of the exciting motors.

In order to achieve the above object, the present invention adopts the following technical solutions.

The self-synchronizing translational elliptical vibrating screen with three exciting motors of the present invention is composed of a feed hopper, a first exciting motor, a second exciting motor, a third exciting motor, a screen box, a vibration isolation spring and a base. The screen box is supported on the base by vibration-isolation springs; the axes of the second and third excitation motors are installed parallel to each other, and the plane where the axes are located is at a certain angle with the horizontal plane, and the same eccentric mass moment is used for constant velocity reaction. Rotate in the opposite direction, the resultant force of the generated excitation inertia force is a linear excitation force. The vertical line connecting the shaft centers of the second excitation motor and the third excitation motor deviates from the total center of mass of the screen box by a certain distance, so that the linear excitation force generated by the second vibration motor and the third vibration motor is also the same as the total screen box. The center of mass deviates by a certain distance, and the linear exciting force makes the center of mass of the screen box move in a straight line, and makes the screen box swing around the center of mass. The axes of the first vibration motor and the second vibration motor and the third vibration motor are horizontally installed on the upper part of the screen box, and the axes do not pass through the centroid of the screen box. The exciting force generated by the first exciting motor makes the center of mass of the screen box move in a circle, and makes the screen box swing around the center of mass. Under the joint action of the exciting forces of the three exciting motors, through proper design of the installation positions of the first exciting motor, the second exciting motor and the third exciting motor, the exciting force of the first exciting motor makes the screen The swing around the center of mass generated by the box and the excitation force of the second and third excitation motors cancel the swing around the center of mass of the screen box, thereby realizing the translational elliptical motion of the screen box. The first vibration motor, the second vibration motor and the third vibration motor can adopt long cylindrical vibration motor or short vibration motor simultaneously. The first vibration motor can adopt the same eccentric mass moment as that of the second vibration motor and the third vibration motor, or can adopt a different eccentric mass moment from the second vibration motor and the third vibration motor.

The advantages of the present invention are: (1) Compared with the currently used elliptical vibrating screen with dual-motor excitation, it can provide greater exciting force, and can improve screening efficiency, processing capacity and The transportation speed of materials is greatly improved. (2) Compared with the existing three-motor elliptical vibrating screen, the axis of any exciting motor does not need to pass through the center of mass of the screen box, and the installation position of the motor is not limited by the structure of the screen box during design. (3) It is easier to achieve the ideal ellipticity than the existing dual-motor or three-motor elliptical vibrating screen. (4) The three motors operate synchronously, with simple structure, easy manufacture and installation, easy maintenance, low noise and low cost.

Description of drawings

Fig. 1 is the front view of the structural schematic diagram of the self-synchronized translational elliptical vibrating screen with three excitation motors of the present invention.

Fig. 2 is a top view of the structure diagram of the long excitation motor of the present invention.

Fig. 3 is a top view of the structure diagram of the short excitation motor of the present invention.

In the figure: 1. Feed hopper, 2. The first vibration excitation motor, 3. The second vibration excitation motor, 4. The third vibration excitation motor, 5. Screen box, 6. Vibration isolation spring, 7. Base.

Detailed ways

Embodiment of the present invention is described in detail below in conjunction with accompanying drawing:

As shown in Fig. 1, Fig. 2 and Fig. 3, the self-synchronized translational elliptical vibrating screen with three excitation motors of the present invention is composed of a feed hopper 1, a first excitation motor 2, a second excitation motor 3, and a third excitation motor. Motor 4, sieve box 5, vibration isolation spring 6 and base 7 form. The screen box 5 is supported on the base 7 by the vibration isolation spring 6 . The axes of the second excitation motor 3 and the third excitation motor 4 are installed parallel to each other, the plane where the axes are located and the horizontal plane form a certain angle α, and the same eccentric mass moment is used to rotate in the opposite direction at a constant speed, and the generated excitation The resultant force of the inertial force is a linear excitation force. The vertical line of the second vibration motor 3 and the 4th shaft center line of the third vibration motor deviates from a certain distance from the total center of mass of the screen box, so that the linear vibration force combined by the second vibration motor 3 and the third vibration motor 4 is also Deviating from the total center of mass of the screen box by a certain distance, the linear exciting force makes the center of mass of the screen box move in a straight line and makes the screen box swing around the center of mass. The axes of the first vibration motor 2 and the second vibration motor 3 and the third vibration motor 4 are horizontally installed on the top of the screen box, and the axes do not pass through the center of mass of the screen box. The exciting force generated by the first exciting motor 2 makes the center of mass of the screen box move in a circle, and makes the screen box swing around the center of mass. Under the combined action of the first vibration motor 2, the second vibration motor 3 and the third vibration motor 4, the first vibration motor 2, the second vibration motor 3 and the third vibration motor 4 are properly designed The installation position, the excitation force of the first vibration motor 2 makes the screen box swing around the center of mass and the excitation force of the second vibration motor 3 and the third vibration motor 4 makes the screen box swing around the center of mass. , so as to realize the translational elliptical motion of the screen box. The first vibration motor 2, the second vibration motor 3 and the third vibration motor 4 can simultaneously adopt a long cylindrical vibration motor or a short vibration motor. The first vibration motor 2 can adopt the same eccentric mass moment as the second vibration motor 3 and the third vibration motor 4, and can also adopt a different eccentric mass moment from the second vibration motor 3 and the third vibration motor 4 .

Claims (2)

1. three shock electric machine self-synchronous Translation elliptic vibrating screens, by feed hopper (1), the first shock electric machine (2), the second shock electric machine (3), the 3rd shock electric machine (4), screen box (5), isolation spring (6) and base (7) composition, screen box (5) is bearing on base (7) by isolation spring (6), it is characterized in that, described the second shock electric machine (3), the 3rd shock electric machine (4) axis is installed abreast, its axis place plane is horizontal by certain angle α, and adopt identical eccentric mass square constant speed to counter-rotate, making a concerted effort of the exciting inertia force producing is a straight line exciting force, perpendicular bisector and the total barycenter of screen box of the second shock electric machine (3), the 3rd shock electric machine (4) axial connecting line depart from certain distance, make the synthetic straight line exciting force of the second shock electric machine (3) and the 3rd shock electric machine (4) also depart from certain distance with the total barycenter of screen box, this straight line exciting force makes screen box barycenter moving linearly, and screen box is swung around barycenter, the axis of the first shock electric machine (2) and the second shock electric machine (3) and the 3rd shock electric machine (4) abreast level is arranged on screen box top, and axis is by screen box barycenter, and the exciting force of its generation makes screen box barycenter do circular motion, and screen box is swung around barycenter, under the acting in conjunction of the first shock electric machine (2) and the second shock electric machine (3) and the 3rd shock electric machine (4), screen box is cancelled and does balanced elliptic motion around the swing of barycenter.

2. three shock electric machine self-synchronous Translation elliptic vibrating screens as claimed in claim 1, is characterized in that, the first shock electric machine (2) can adopt long tubular shock electric machine or short shock electric machine with the second shock electric machine (3) and the 3rd shock electric machine (4) simultaneously.