Four-short shock exciting motor elliptical vibrating screen coupled with torsion springs

Abstract

The invention discloses a four-short shock exciting motor elliptical vibrating screen coupled with a torsion spring. The four-short shock exciting motor elliptical vibrating screen coupled with the torsion spring mainly consists of a feed hopper, four shock exciting motors, a protective cover, a motor base, a screen box, a vibration isolation spring, a base, coupling eccentric blocks and the torsion springs. The shock exciting motors are pairwise coaxially mounted on the motor base in parallel; and the torsion springs connect the coupling eccentric blocks of two shock exciting motors with overlapped axes to absorb shock caused by starting of the two and to realize zero-phase synchronization of the two. Two coupled shock exciting motors adopt the same mass torques, and are synchronously started in the same direction. Two shock exciting motors near a feed end use higher eccentric mass torques; two shock exciting motors near a discharge end use lower eccentric mass torques; the two sets of shock exciting motors reversely rotate at the same speed; and the generated shock exciting force realizes an elliptic motion of the vibration screen. After stable operation, one of two coupled shock exciting motors is electrified. The vibrating screen can fully exert the shock exciting force of the shock exciting motors, realizes high vibrating amplitude, and is low in energy consumption and noise.

Description

technical field [0001] The patent of the invention relates to a vibrating screen for solid-liquid separation and solid material screening, especially a four-machine-driven translational elliptical vibrating screen with large screening area used in ore dressing, coal preparation, metallurgy, oil drilling and other operations. Background technique [0002] The translational elliptical vibrating screen can be realized by double excitation motors. When dual excitation motors are used, the total excitation force is limited, and it is difficult to achieve the excitation force required for large-area and high-efficiency screening of the vibrating screen. ZL200910187748.6 adopts four excitation motors for self-synchronous vibration. The four excitation motors are divided into two pairs and installed symmetrically on the vibration motor bases of the two auxiliary rigid body units. There is no connection between each pair of vibration motors. , to realize the linear motion track of t...

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Problems solved by technology

When dual excitation motors are used, the total excitation force is limited, and it is difficult to meet the requirements of the excitation force required for large-area and high-efficiency screening of vibrating screens

ZL200910187748.6 adopts four excitation motors for self-synchronous vibration. The four excitation motors are divided into two pairs and installed symmetrically on the vibration motor bases of the two auxiliary rigid body units. There is no connection between each pair of vibration motors. , to realize the linear motion track of the vibrating screen, two auxiliary rigid bodies are symmetrically installed on the position of the screen body with the longitudinal axis as the symmetrical axis. The vibrating motors will appear in an anti-phase synchronous state. This structure cannot avoid the electromechanical coupling between each pair of motors running in the same direction. The phase difference angle between the coaxial vibrating motors makes the exciting force on the screen box in the width direction asymmetric. , so that the effective excitation force received by the vibrating screen is reduced, and the purpose of increasing the excitation force with multiple excitation motors cannot be achieved. At the same time, the excitation forces received by the two pairs of motors in the width direction of the screen box cannot cancel each other out. The sieve box will produce a large lateral swing. In order to overcome the shortcomings of the insufficient excitation force of the elliptical vibrating screen with double excitation motors and the fact that the effective excitation force of the elliptical vibrating screen with four excitation motors may not be able to increase due to electromechanical coupling, this paper is proposed. Invented torsion spring coupled four-short excitation motor elliptical vibrating screen

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