Vibrating screen natural frequency regulating method and device

Abstract

The invention discloses a vibrating screen natural frequency regulating method and device; the method comprises the steps that the free vibration in a vertical direction of a vibrating screen on which a natural frequency regulating device is preinstalled is actually measured and analyzed to obtain the actually measured natural frequency; calculated natural frequency and a corresponding regular vibration mode are calculated through a general mathematical model; the actually measured natural frequency is compared with design natural frequency, and whether the natural frequency needs to be adjusted or not is judged according to the error criteria of the natural frequency. If adjustment is needed, an adjustment target value is determined and regulation is carried out through the regulating device, so as to judge whether to repeat the steps to the actually measured natural frequency after adjustment according to the error criteria. The device comprises a dovetail groove guide rail and a slider, a slider steel wire rope and a connector, a double-lug spring base and a pressure plate, a force adjusting bolt pair, a suspension compression spiral spring, a pressure plate steel wire rope, a connector and a three-lug suspension. The device has the characteristics of good economy, simplicity in operation, and assistance in absorbing the shock of a screen body and reducing the swinging and torsion of the screen body.

Description

technical field [0001] The invention relates to a method and device for adjusting the natural frequency of equipment, in particular to a method and device for adjusting the natural frequency of a vibrating screen. Background technique [0002] In the field of mineral screening, the main damping device of the vibrating screen is usually composed of a single metal cylindrical helical compression spring or a parallel combination of multiple such springs, one end of which is connected to the support of the screen body, and the other end is generally installed on the on the base. Due to the long-term impact of dynamically changing pressure loads and humid and harsh working environments, it is often found in actual production that the spring is severely distorted, the spring wire is corroded and cracked, or the spring force is insufficient. When the vibrating screen vibrates under strong alternating loads, the damage or failure of the spring will change the actual stiffness value...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method and device for adjusting the natural frequency of a vibrating screen, which solves the conventional problem of complex operation and uneconomical operation of changing the natural frequency by replacing or increasing or decreasing the existing damping spring

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